diff --git a/.idea/jsLibraryMappings.xml b/.idea/jsLibraryMappings.xml index 02b6bbf..cffc550 100644 --- a/.idea/jsLibraryMappings.xml +++ b/.idea/jsLibraryMappings.xml @@ -1,6 +1,7 @@ + \ No newline at end of file diff --git a/build.gradle b/build.gradle index e7e3a11..ab148a7 100644 --- a/build.gradle +++ b/build.gradle @@ -69,6 +69,9 @@ dependencies { implementation 'com.formdev:flatlaf-intellij-themes:3.2.1' // 官方主题包 implementation 'org.python:jython-standalone:2.7.3' + implementation 'org.graalvm.python:python-embedding:24.2.1' + + implementation files('libs/JNC-1.0-jnc.jar') implementation 'org.fxmisc.richtext:richtextfx:0.11.0' // 更新后的richtextfx implementation 'org.bitbucket.mstrobel:procyon-core:0.5.36' // 使用JitPack版本 @@ -146,6 +149,8 @@ dependencies { implementation 'com.github.axet:TarsosDSP:2.4' + implementation 'org.json:json:20231013' + // Eclipse 组件 // https://mvnrepository.com/artifact/org.eclipse.swt/org.eclipse.swt.win32.win32.x86_64 //implementation 'org.eclipse.swt:org.eclipse.swt.win32.win32.x86_64:4.3' @@ -155,6 +160,9 @@ dependencies { //implementation 'org.eclipse.platform:org.eclipse.jface.text:3.27.0' // 使用兼容版本 //implementation 'org.eclipse.platform:org.eclipse.core.runtime:3.33.0' //implementation 'org.eclipse.platform:org.eclipse.equinox.common:3.20.0' + + + } // 分离依赖项到 libs 目录 diff --git a/javascript/CCodeEditor.html b/javascript/CCodeEditor.html new file mode 100644 index 0000000..5f5605c --- /dev/null +++ b/javascript/CCodeEditor.html @@ -0,0 +1,364 @@ + + + + C语言编辑器 + + + + + +
+
+ +
+
+
+ 

+    

+

+
+
+
+
+
\ No newline at end of file
diff --git a/javascript/CodeEditor.html b/javascript/CodeEditor.html
new file mode 100644
index 0000000..c32212d
--- /dev/null
+++ b/javascript/CodeEditor.html
@@ -0,0 +1,164 @@
+
+
+
+    
+    在线代码编辑器
+    
+    
+
+
+

+    
+    
+

+
+

+
+

+    就绪
+

+
+

+
+
+
+
\ No newline at end of file
diff --git a/javascript/extLibs/http_cdn.jsdelivr.net_npm_katex@0.16.9_dist_contrib_auto-render.js b/javascript/extLibs/http_cdn.jsdelivr.net_npm_katex@0.16.9_dist_contrib_auto-render.js
new file mode 100644
index 0000000..0ec4f69
--- /dev/null
+++ b/javascript/extLibs/http_cdn.jsdelivr.net_npm_katex@0.16.9_dist_contrib_auto-render.js
@@ -0,0 +1,349 @@
+(function webpackUniversalModuleDefinition(root, factory) {
+	if(typeof exports === 'object' && typeof module === 'object')
+		module.exports = factory(require("katex"));
+	else if(typeof define === 'function' && define.amd)
+		define(["katex"], factory);
+	else if(typeof exports === 'object')
+		exports["renderMathInElement"] = factory(require("katex"));
+	else
+		root["renderMathInElement"] = factory(root["katex"]);
+})((typeof self !== 'undefined' ? self : this), function(__WEBPACK_EXTERNAL_MODULE__771__) {
+return /******/ (function() { // webpackBootstrap
+/******/ 	"use strict";
+/******/ 	var __webpack_modules__ = ({
+
+/***/ 771:
+/***/ (function(module) {
+
+module.exports = __WEBPACK_EXTERNAL_MODULE__771__;
+
+/***/ })
+
+/******/ 	});
+/************************************************************************/
+/******/ 	// The module cache
+/******/ 	var __webpack_module_cache__ = {};
+/******/ 	
+/******/ 	// The require function
+/******/ 	function __webpack_require__(moduleId) {
+/******/ 		// Check if module is in cache
+/******/ 		var cachedModule = __webpack_module_cache__[moduleId];
+/******/ 		if (cachedModule !== undefined) {
+/******/ 			return cachedModule.exports;
+/******/ 		}
+/******/ 		// Create a new module (and put it into the cache)
+/******/ 		var module = __webpack_module_cache__[moduleId] = {
+/******/ 			// no module.id needed
+/******/ 			// no module.loaded needed
+/******/ 			exports: {}
+/******/ 		};
+/******/ 	
+/******/ 		// Execute the module function
+/******/ 		__webpack_modules__[moduleId](module, module.exports, __webpack_require__);
+/******/ 	
+/******/ 		// Return the exports of the module
+/******/ 		return module.exports;
+/******/ 	}
+/******/ 	
+/************************************************************************/
+/******/ 	/* webpack/runtime/compat get default export */
+/******/ 	!function() {
+/******/ 		// getDefaultExport function for compatibility with non-harmony modules
+/******/ 		__webpack_require__.n = function(module) {
+/******/ 			var getter = module && module.__esModule ?
+/******/ 				function() { return module['default']; } :
+/******/ 				function() { return module; };
+/******/ 			__webpack_require__.d(getter, { a: getter });
+/******/ 			return getter;
+/******/ 		};
+/******/ 	}();
+/******/ 	
+/******/ 	/* webpack/runtime/define property getters */
+/******/ 	!function() {
+/******/ 		// define getter functions for harmony exports
+/******/ 		__webpack_require__.d = function(exports, definition) {
+/******/ 			for(var key in definition) {
+/******/ 				if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {
+/******/ 					Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
+/******/ 				}
+/******/ 			}
+/******/ 		};
+/******/ 	}();
+/******/ 	
+/******/ 	/* webpack/runtime/hasOwnProperty shorthand */
+/******/ 	!function() {
+/******/ 		__webpack_require__.o = function(obj, prop) { return Object.prototype.hasOwnProperty.call(obj, prop); }
+/******/ 	}();
+/******/ 	
+/************************************************************************/
+var __webpack_exports__ = {};
+// This entry need to be wrapped in an IIFE because it need to be isolated against other modules in the chunk.
+!function() {
+
+// EXPORTS
+__webpack_require__.d(__webpack_exports__, {
+  "default": function() { return /* binding */ auto_render; }
+});
+
+// EXTERNAL MODULE: external "katex"
+var external_katex_ = __webpack_require__(771);
+var external_katex_default = /*#__PURE__*/__webpack_require__.n(external_katex_);
+;// CONCATENATED MODULE: ./contrib/auto-render/splitAtDelimiters.js
+/* eslint no-constant-condition:0 */
+var findEndOfMath = function findEndOfMath(delimiter, text, startIndex) {
+  // Adapted from
+  // https://github.com/Khan/perseus/blob/master/src/perseus-markdown.jsx
+  var index = startIndex;
+  var braceLevel = 0;
+  var delimLength = delimiter.length;
+
+  while (index < text.length) {
+    var character = text[index];
+
+    if (braceLevel <= 0 && text.slice(index, index + delimLength) === delimiter) {
+      return index;
+    } else if (character === "\\") {
+      index++;
+    } else if (character === "{") {
+      braceLevel++;
+    } else if (character === "}") {
+      braceLevel--;
+    }
+
+    index++;
+  }
+
+  return -1;
+};
+
+var escapeRegex = function escapeRegex(string) {
+  return string.replace(/[-/\\^$*+?.()|[\]{}]/g, "\\$&");
+};
+
+var amsRegex = /^\\begin{/;
+
+var splitAtDelimiters = function splitAtDelimiters(text, delimiters) {
+  var index;
+  var data = [];
+  var regexLeft = new RegExp("(" + delimiters.map(function (x) {
+    return escapeRegex(x.left);
+  }).join("|") + ")");
+
+  while (true) {
+    index = text.search(regexLeft);
+
+    if (index === -1) {
+      break;
+    }
+
+    if (index > 0) {
+      data.push({
+        type: "text",
+        data: text.slice(0, index)
+      });
+      text = text.slice(index); // now text starts with delimiter
+    } // ... so this always succeeds:
+
+
+    var i = delimiters.findIndex(function (delim) {
+      return text.startsWith(delim.left);
+    });
+    index = findEndOfMath(delimiters[i].right, text, delimiters[i].left.length);
+
+    if (index === -1) {
+      break;
+    }
+
+    var rawData = text.slice(0, index + delimiters[i].right.length);
+    var math = amsRegex.test(rawData) ? rawData : text.slice(delimiters[i].left.length, index);
+    data.push({
+      type: "math",
+      data: math,
+      rawData: rawData,
+      display: delimiters[i].display
+    });
+    text = text.slice(index + delimiters[i].right.length);
+  }
+
+  if (text !== "") {
+    data.push({
+      type: "text",
+      data: text
+    });
+  }
+
+  return data;
+};
+
+/* harmony default export */ var auto_render_splitAtDelimiters = (splitAtDelimiters);
+;// CONCATENATED MODULE: ./contrib/auto-render/auto-render.js
+/* eslint no-console:0 */
+
+
+/* Note: optionsCopy is mutated by this method. If it is ever exposed in the
+ * API, we should copy it before mutating.
+ */
+
+var renderMathInText = function renderMathInText(text, optionsCopy) {
+  var data = auto_render_splitAtDelimiters(text, optionsCopy.delimiters);
+
+  if (data.length === 1 && data[0].type === 'text') {
+    // There is no formula in the text.
+    // Let's return null which means there is no need to replace
+    // the current text node with a new one.
+    return null;
+  }
+
+  var fragment = document.createDocumentFragment();
+
+  for (var i = 0; i < data.length; i++) {
+    if (data[i].type === "text") {
+      fragment.appendChild(document.createTextNode(data[i].data));
+    } else {
+      var span = document.createElement("span");
+      var math = data[i].data; // Override any display mode defined in the settings with that
+      // defined by the text itself
+
+      optionsCopy.displayMode = data[i].display;
+
+      try {
+        if (optionsCopy.preProcess) {
+          math = optionsCopy.preProcess(math);
+        }
+
+        external_katex_default().render(math, span, optionsCopy);
+      } catch (e) {
+        if (!(e instanceof (external_katex_default()).ParseError)) {
+          throw e;
+        }
+
+        optionsCopy.errorCallback("KaTeX auto-render: Failed to parse `" + data[i].data + "` with ", e);
+        fragment.appendChild(document.createTextNode(data[i].rawData));
+        continue;
+      }
+
+      fragment.appendChild(span);
+    }
+  }
+
+  return fragment;
+};
+
+var renderElem = function renderElem(elem, optionsCopy) {
+  for (var i = 0; i < elem.childNodes.length; i++) {
+    var childNode = elem.childNodes[i];
+
+    if (childNode.nodeType === 3) {
+      // Text node
+      // Concatenate all sibling text nodes.
+      // Webkit browsers split very large text nodes into smaller ones,
+      // so the delimiters may be split across different nodes.
+      var textContentConcat = childNode.textContent;
+      var sibling = childNode.nextSibling;
+      var nSiblings = 0;
+
+      while (sibling && sibling.nodeType === Node.TEXT_NODE) {
+        textContentConcat += sibling.textContent;
+        sibling = sibling.nextSibling;
+        nSiblings++;
+      }
+
+      var frag = renderMathInText(textContentConcat, optionsCopy);
+
+      if (frag) {
+        // Remove extra text nodes
+        for (var j = 0; j < nSiblings; j++) {
+          childNode.nextSibling.remove();
+        }
+
+        i += frag.childNodes.length - 1;
+        elem.replaceChild(frag, childNode);
+      } else {
+        // If the concatenated text does not contain math
+        // the siblings will not either
+        i += nSiblings;
+      }
+    } else if (childNode.nodeType === 1) {
+      (function () {
+        // Element node
+        var className = ' ' + childNode.className + ' ';
+        var shouldRender = optionsCopy.ignoredTags.indexOf(childNode.nodeName.toLowerCase()) === -1 && optionsCopy.ignoredClasses.every(function (x) {
+          return className.indexOf(' ' + x + ' ') === -1;
+        });
+
+        if (shouldRender) {
+          renderElem(childNode, optionsCopy);
+        }
+      })();
+    } // Otherwise, it's something else, and ignore it.
+
+  }
+};
+
+var renderMathInElement = function renderMathInElement(elem, options) {
+  if (!elem) {
+    throw new Error("No element provided to render");
+  }
+
+  var optionsCopy = {}; // Object.assign(optionsCopy, option)
+
+  for (var option in options) {
+    if (options.hasOwnProperty(option)) {
+      optionsCopy[option] = options[option];
+    }
+  } // default options
+
+
+  optionsCopy.delimiters = optionsCopy.delimiters || [{
+    left: "$$",
+    right: "$$",
+    display: true
+  }, {
+    left: "\\(",
+    right: "\\)",
+    display: false
+  }, // LaTeX uses $…$, but it ruins the display of normal `$` in text:
+  // {left: "$", right: "$", display: false},
+  // $ must come after $$
+  // Render AMS environments even if outside $$…$$ delimiters.
+  {
+    left: "\\begin{equation}",
+    right: "\\end{equation}",
+    display: true
+  }, {
+    left: "\\begin{align}",
+    right: "\\end{align}",
+    display: true
+  }, {
+    left: "\\begin{alignat}",
+    right: "\\end{alignat}",
+    display: true
+  }, {
+    left: "\\begin{gather}",
+    right: "\\end{gather}",
+    display: true
+  }, {
+    left: "\\begin{CD}",
+    right: "\\end{CD}",
+    display: true
+  }, {
+    left: "\\[",
+    right: "\\]",
+    display: true
+  }];
+  optionsCopy.ignoredTags = optionsCopy.ignoredTags || ["script", "noscript", "style", "textarea", "pre", "code", "option"];
+  optionsCopy.ignoredClasses = optionsCopy.ignoredClasses || [];
+  optionsCopy.errorCallback = optionsCopy.errorCallback || console.error; // Enable sharing of global macros defined via `\gdef` between different
+  // math elements within a single call to `renderMathInElement`.
+
+  optionsCopy.macros = optionsCopy.macros || {};
+  renderElem(elem, optionsCopy);
+};
+
+/* harmony default export */ var auto_render = (renderMathInElement);
+}();
+__webpack_exports__ = __webpack_exports__["default"];
+/******/ 	return __webpack_exports__;
+/******/ })()
+;
+});
\ No newline at end of file
diff --git a/javascript/extLibs/http_cdn.jsdelivr.net_npm_katex@0.16.9_dist_katex.css b/javascript/extLibs/http_cdn.jsdelivr.net_npm_katex@0.16.9_dist_katex.css
new file mode 100644
index 0000000..7f3704e
--- /dev/null
+++ b/javascript/extLibs/http_cdn.jsdelivr.net_npm_katex@0.16.9_dist_katex.css
@@ -0,0 +1,1086 @@
+/* stylelint-disable font-family-no-missing-generic-family-keyword */
+@font-face {
+  font-family: 'KaTeX_AMS';
+  src: url(fonts/KaTeX_AMS-Regular.woff2) format('woff2'), url(fonts/KaTeX_AMS-Regular.woff) format('woff'), url(fonts/KaTeX_AMS-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Caligraphic';
+  src: url(fonts/KaTeX_Caligraphic-Bold.woff2) format('woff2'), url(fonts/KaTeX_Caligraphic-Bold.woff) format('woff'), url(fonts/KaTeX_Caligraphic-Bold.ttf) format('truetype');
+  font-weight: bold;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Caligraphic';
+  src: url(fonts/KaTeX_Caligraphic-Regular.woff2) format('woff2'), url(fonts/KaTeX_Caligraphic-Regular.woff) format('woff'), url(fonts/KaTeX_Caligraphic-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Fraktur';
+  src: url(fonts/KaTeX_Fraktur-Bold.woff2) format('woff2'), url(fonts/KaTeX_Fraktur-Bold.woff) format('woff'), url(fonts/KaTeX_Fraktur-Bold.ttf) format('truetype');
+  font-weight: bold;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Fraktur';
+  src: url(fonts/KaTeX_Fraktur-Regular.woff2) format('woff2'), url(fonts/KaTeX_Fraktur-Regular.woff) format('woff'), url(fonts/KaTeX_Fraktur-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Main';
+  src: url(fonts/KaTeX_Main-Bold.woff2) format('woff2'), url(fonts/KaTeX_Main-Bold.woff) format('woff'), url(fonts/KaTeX_Main-Bold.ttf) format('truetype');
+  font-weight: bold;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Main';
+  src: url(fonts/KaTeX_Main-BoldItalic.woff2) format('woff2'), url(fonts/KaTeX_Main-BoldItalic.woff) format('woff'), url(fonts/KaTeX_Main-BoldItalic.ttf) format('truetype');
+  font-weight: bold;
+  font-style: italic;
+}
+@font-face {
+  font-family: 'KaTeX_Main';
+  src: url(fonts/KaTeX_Main-Italic.woff2) format('woff2'), url(fonts/KaTeX_Main-Italic.woff) format('woff'), url(fonts/KaTeX_Main-Italic.ttf) format('truetype');
+  font-weight: normal;
+  font-style: italic;
+}
+@font-face {
+  font-family: 'KaTeX_Main';
+  src: url(fonts/KaTeX_Main-Regular.woff2) format('woff2'), url(fonts/KaTeX_Main-Regular.woff) format('woff'), url(fonts/KaTeX_Main-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Math';
+  src: url(fonts/KaTeX_Math-BoldItalic.woff2) format('woff2'), url(fonts/KaTeX_Math-BoldItalic.woff) format('woff'), url(fonts/KaTeX_Math-BoldItalic.ttf) format('truetype');
+  font-weight: bold;
+  font-style: italic;
+}
+@font-face {
+  font-family: 'KaTeX_Math';
+  src: url(fonts/KaTeX_Math-Italic.woff2) format('woff2'), url(fonts/KaTeX_Math-Italic.woff) format('woff'), url(fonts/KaTeX_Math-Italic.ttf) format('truetype');
+  font-weight: normal;
+  font-style: italic;
+}
+@font-face {
+  font-family: 'KaTeX_SansSerif';
+  src: url(fonts/KaTeX_SansSerif-Bold.woff2) format('woff2'), url(fonts/KaTeX_SansSerif-Bold.woff) format('woff'), url(fonts/KaTeX_SansSerif-Bold.ttf) format('truetype');
+  font-weight: bold;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_SansSerif';
+  src: url(fonts/KaTeX_SansSerif-Italic.woff2) format('woff2'), url(fonts/KaTeX_SansSerif-Italic.woff) format('woff'), url(fonts/KaTeX_SansSerif-Italic.ttf) format('truetype');
+  font-weight: normal;
+  font-style: italic;
+}
+@font-face {
+  font-family: 'KaTeX_SansSerif';
+  src: url(fonts/KaTeX_SansSerif-Regular.woff2) format('woff2'), url(fonts/KaTeX_SansSerif-Regular.woff) format('woff'), url(fonts/KaTeX_SansSerif-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Script';
+  src: url(fonts/KaTeX_Script-Regular.woff2) format('woff2'), url(fonts/KaTeX_Script-Regular.woff) format('woff'), url(fonts/KaTeX_Script-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Size1';
+  src: url(fonts/KaTeX_Size1-Regular.woff2) format('woff2'), url(fonts/KaTeX_Size1-Regular.woff) format('woff'), url(fonts/KaTeX_Size1-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Size2';
+  src: url(fonts/KaTeX_Size2-Regular.woff2) format('woff2'), url(fonts/KaTeX_Size2-Regular.woff) format('woff'), url(fonts/KaTeX_Size2-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Size3';
+  src: url(fonts/KaTeX_Size3-Regular.woff2) format('woff2'), url(fonts/KaTeX_Size3-Regular.woff) format('woff'), url(fonts/KaTeX_Size3-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Size4';
+  src: url(fonts/KaTeX_Size4-Regular.woff2) format('woff2'), url(fonts/KaTeX_Size4-Regular.woff) format('woff'), url(fonts/KaTeX_Size4-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+@font-face {
+  font-family: 'KaTeX_Typewriter';
+  src: url(fonts/KaTeX_Typewriter-Regular.woff2) format('woff2'), url(fonts/KaTeX_Typewriter-Regular.woff) format('woff'), url(fonts/KaTeX_Typewriter-Regular.ttf) format('truetype');
+  font-weight: normal;
+  font-style: normal;
+}
+.katex {
+  font: normal 1.21em KaTeX_Main, Times New Roman, serif;
+  line-height: 1.2;
+  text-indent: 0;
+  text-rendering: auto;
+}
+.katex * {
+  -ms-high-contrast-adjust: none !important;
+}
+.katex * {
+  border-color: currentColor;
+}
+.katex .katex-version::after {
+  content: "0.16.9";
+}
+.katex .katex-mathml {
+  /* Accessibility hack to only show to screen readers
+         Found at: http://a11yproject.com/posts/how-to-hide-content/ */
+  position: absolute;
+  clip: rect(1px, 1px, 1px, 1px);
+  padding: 0;
+  border: 0;
+  height: 1px;
+  width: 1px;
+  overflow: hidden;
+}
+.katex .katex-html {
+  /* \newline is an empty block at top level, between .base elements */
+}
+.katex .katex-html > .newline {
+  display: block;
+}
+.katex .base {
+  position: relative;
+  display: inline-block;
+  white-space: nowrap;
+  width: -webkit-min-content;
+  width: -moz-min-content;
+  width: min-content;
+}
+.katex .strut {
+  display: inline-block;
+}
+.katex .textbf {
+  font-weight: bold;
+}
+.katex .textit {
+  font-style: italic;
+}
+.katex .textrm {
+  font-family: KaTeX_Main;
+}
+.katex .textsf {
+  font-family: KaTeX_SansSerif;
+}
+.katex .texttt {
+  font-family: KaTeX_Typewriter;
+}
+.katex .mathnormal {
+  font-family: KaTeX_Math;
+  font-style: italic;
+}
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+.katex .fontsize-ensurer.reset-size11.size6 {
+  font-size: 0.40192926em;
+}
+.katex .sizing.reset-size11.size7,
+.katex .fontsize-ensurer.reset-size11.size7 {
+  font-size: 0.48231511em;
+}
+.katex .sizing.reset-size11.size8,
+.katex .fontsize-ensurer.reset-size11.size8 {
+  font-size: 0.57877814em;
+}
+.katex .sizing.reset-size11.size9,
+.katex .fontsize-ensurer.reset-size11.size9 {
+  font-size: 0.69453376em;
+}
+.katex .sizing.reset-size11.size10,
+.katex .fontsize-ensurer.reset-size11.size10 {
+  font-size: 0.83360129em;
+}
+.katex .sizing.reset-size11.size11,
+.katex .fontsize-ensurer.reset-size11.size11 {
+  font-size: 1em;
+}
+.katex .delimsizing.size1 {
+  font-family: KaTeX_Size1;
+}
+.katex .delimsizing.size2 {
+  font-family: KaTeX_Size2;
+}
+.katex .delimsizing.size3 {
+  font-family: KaTeX_Size3;
+}
+.katex .delimsizing.size4 {
+  font-family: KaTeX_Size4;
+}
+.katex .delimsizing.mult .delim-size1 > span {
+  font-family: KaTeX_Size1;
+}
+.katex .delimsizing.mult .delim-size4 > span {
+  font-family: KaTeX_Size4;
+}
+.katex .nulldelimiter {
+  display: inline-block;
+  width: 0.12em;
+}
+.katex .delimcenter {
+  position: relative;
+}
+.katex .op-symbol {
+  position: relative;
+}
+.katex .op-symbol.small-op {
+  font-family: KaTeX_Size1;
+}
+.katex .op-symbol.large-op {
+  font-family: KaTeX_Size2;
+}
+.katex .op-limits > .vlist-t {
+  text-align: center;
+}
+.katex .accent > .vlist-t {
+  text-align: center;
+}
+.katex .accent .accent-body {
+  position: relative;
+}
+.katex .accent .accent-body:not(.accent-full) {
+  width: 0;
+}
+.katex .overlay {
+  display: block;
+}
+.katex .mtable .vertical-separator {
+  display: inline-block;
+  min-width: 1px;
+}
+.katex .mtable .arraycolsep {
+  display: inline-block;
+}
+.katex .mtable .col-align-c > .vlist-t {
+  text-align: center;
+}
+.katex .mtable .col-align-l > .vlist-t {
+  text-align: left;
+}
+.katex .mtable .col-align-r > .vlist-t {
+  text-align: right;
+}
+.katex .svg-align {
+  text-align: left;
+}
+.katex svg {
+  display: block;
+  position: absolute;
+  width: 100%;
+  height: inherit;
+  fill: currentColor;
+  stroke: currentColor;
+  fill-rule: nonzero;
+  fill-opacity: 1;
+  stroke-width: 1;
+  stroke-linecap: butt;
+  stroke-linejoin: miter;
+  stroke-miterlimit: 4;
+  stroke-dasharray: none;
+  stroke-dashoffset: 0;
+  stroke-opacity: 1;
+}
+.katex svg path {
+  stroke: none;
+}
+.katex img {
+  border-style: none;
+  min-width: 0;
+  min-height: 0;
+  max-width: none;
+  max-height: none;
+}
+.katex .stretchy {
+  width: 100%;
+  display: block;
+  position: relative;
+  overflow: hidden;
+}
+.katex .stretchy::before,
+.katex .stretchy::after {
+  content: "";
+}
+.katex .hide-tail {
+  width: 100%;
+  position: relative;
+  overflow: hidden;
+}
+.katex .halfarrow-left {
+  position: absolute;
+  left: 0;
+  width: 50.2%;
+  overflow: hidden;
+}
+.katex .halfarrow-right {
+  position: absolute;
+  right: 0;
+  width: 50.2%;
+  overflow: hidden;
+}
+.katex .brace-left {
+  position: absolute;
+  left: 0;
+  width: 25.1%;
+  overflow: hidden;
+}
+.katex .brace-center {
+  position: absolute;
+  left: 25%;
+  width: 50%;
+  overflow: hidden;
+}
+.katex .brace-right {
+  position: absolute;
+  right: 0;
+  width: 25.1%;
+  overflow: hidden;
+}
+.katex .x-arrow-pad {
+  padding: 0 0.5em;
+}
+.katex .cd-arrow-pad {
+  padding: 0 0.55556em 0 0.27778em;
+}
+.katex .x-arrow,
+.katex .mover,
+.katex .munder {
+  text-align: center;
+}
+.katex .boxpad {
+  padding: 0 0.3em;
+}
+.katex .fbox,
+.katex .fcolorbox {
+  box-sizing: border-box;
+  border: 0.04em solid;
+}
+.katex .cancel-pad {
+  padding: 0 0.2em;
+}
+.katex .cancel-lap {
+  margin-left: -0.2em;
+  margin-right: -0.2em;
+}
+.katex .sout {
+  border-bottom-style: solid;
+  border-bottom-width: 0.08em;
+}
+.katex .angl {
+  box-sizing: border-box;
+  border-top: 0.049em solid;
+  border-right: 0.049em solid;
+  margin-right: 0.03889em;
+}
+.katex .anglpad {
+  padding: 0 0.03889em;
+}
+.katex .eqn-num::before {
+  counter-increment: katexEqnNo;
+  content: "(" counter(katexEqnNo) ")";
+}
+.katex .mml-eqn-num::before {
+  counter-increment: mmlEqnNo;
+  content: "(" counter(mmlEqnNo) ")";
+}
+.katex .mtr-glue {
+  width: 50%;
+}
+.katex .cd-vert-arrow {
+  display: inline-block;
+  position: relative;
+}
+.katex .cd-label-left {
+  display: inline-block;
+  position: absolute;
+  right: calc(50% + 0.3em);
+  text-align: left;
+}
+.katex .cd-label-right {
+  display: inline-block;
+  position: absolute;
+  left: calc(50% + 0.3em);
+  text-align: right;
+}
+.katex-display {
+  display: block;
+  margin: 1em 0;
+  text-align: center;
+}
+.katex-display > .katex {
+  display: block;
+  text-align: center;
+  white-space: nowrap;
+}
+.katex-display > .katex > .katex-html {
+  display: block;
+  position: relative;
+}
+.katex-display > .katex > .katex-html > .tag {
+  position: absolute;
+  right: 0;
+}
+.katex-display.leqno > .katex > .katex-html > .tag {
+  left: 0;
+  right: auto;
+}
+.katex-display.fleqn > .katex {
+  text-align: left;
+  padding-left: 2em;
+}
+body {
+  counter-reset: katexEqnNo mmlEqnNo;
+}
+
diff --git a/javascript/extLibs/http_cdn.jsdelivr.net_npm_katex@0.16.9_dist_katex.js b/javascript/extLibs/http_cdn.jsdelivr.net_npm_katex@0.16.9_dist_katex.js
new file mode 100644
index 0000000..568e8f3
--- /dev/null
+++ b/javascript/extLibs/http_cdn.jsdelivr.net_npm_katex@0.16.9_dist_katex.js
@@ -0,0 +1,18829 @@
+(function webpackUniversalModuleDefinition(root, factory) {
+	if(typeof exports === 'object' && typeof module === 'object')
+		module.exports = factory();
+	else if(typeof define === 'function' && define.amd)
+		define([], factory);
+	else if(typeof exports === 'object')
+		exports["katex"] = factory();
+	else
+		root["katex"] = factory();
+})((typeof self !== 'undefined' ? self : this), function() {
+return /******/ (function() { // webpackBootstrap
+/******/ 	"use strict";
+/******/ 	// The require scope
+/******/ 	var __webpack_require__ = {};
+/******/ 	
+/************************************************************************/
+/******/ 	/* webpack/runtime/define property getters */
+/******/ 	!function() {
+/******/ 		// define getter functions for harmony exports
+/******/ 		__webpack_require__.d = function(exports, definition) {
+/******/ 			for(var key in definition) {
+/******/ 				if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {
+/******/ 					Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
+/******/ 				}
+/******/ 			}
+/******/ 		};
+/******/ 	}();
+/******/ 	
+/******/ 	/* webpack/runtime/hasOwnProperty shorthand */
+/******/ 	!function() {
+/******/ 		__webpack_require__.o = function(obj, prop) { return Object.prototype.hasOwnProperty.call(obj, prop); }
+/******/ 	}();
+/******/ 	
+/************************************************************************/
+var __webpack_exports__ = {};
+
+// EXPORTS
+__webpack_require__.d(__webpack_exports__, {
+  "default": function() { return /* binding */ katex_webpack; }
+});
+
+;// CONCATENATED MODULE: ./src/ParseError.js
+
+
+/**
+ * This is the ParseError class, which is the main error thrown by KaTeX
+ * functions when something has gone wrong. This is used to distinguish internal
+ * errors from errors in the expression that the user provided.
+ *
+ * If possible, a caller should provide a Token or ParseNode with information
+ * about where in the source string the problem occurred.
+ */
+var ParseError = // Error start position based on passed-in Token or ParseNode.
+// Length of affected text based on passed-in Token or ParseNode.
+// The underlying error message without any context added.
+function ParseError(message, // The error message
+token // An object providing position information
+) {
+  this.name = void 0;
+  this.position = void 0;
+  this.length = void 0;
+  this.rawMessage = void 0;
+  var error = "KaTeX parse error: " + message;
+  var start;
+  var end;
+  var loc = token && token.loc;
+
+  if (loc && loc.start <= loc.end) {
+    // If we have the input and a position, make the error a bit fancier
+    // Get the input
+    var input = loc.lexer.input; // Prepend some information
+
+    start = loc.start;
+    end = loc.end;
+
+    if (start === input.length) {
+      error += " at end of input: ";
+    } else {
+      error += " at position " + (start + 1) + ": ";
+    } // Underline token in question using combining underscores
+
+
+    var underlined = input.slice(start, end).replace(/[^]/g, "$&\u0332"); // Extract some context from the input and add it to the error
+
+    var left;
+
+    if (start > 15) {
+      left = "…" + input.slice(start - 15, start);
+    } else {
+      left = input.slice(0, start);
+    }
+
+    var right;
+
+    if (end + 15 < input.length) {
+      right = input.slice(end, end + 15) + "…";
+    } else {
+      right = input.slice(end);
+    }
+
+    error += left + underlined + right;
+  } // Some hackery to make ParseError a prototype of Error
+  // See http://stackoverflow.com/a/8460753
+  // $FlowFixMe
+
+
+  var self = new Error(error);
+  self.name = "ParseError"; // $FlowFixMe
+
+  self.__proto__ = ParseError.prototype;
+  self.position = start;
+
+  if (start != null && end != null) {
+    self.length = end - start;
+  }
+
+  self.rawMessage = message;
+  return self;
+}; // $FlowFixMe More hackery
+
+
+ParseError.prototype.__proto__ = Error.prototype;
+/* harmony default export */ var src_ParseError = (ParseError);
+;// CONCATENATED MODULE: ./src/utils.js
+/**
+ * This file contains a list of utility functions which are useful in other
+ * files.
+ */
+
+/**
+ * Return whether an element is contained in a list
+ */
+var contains = function contains(list, elem) {
+  return list.indexOf(elem) !== -1;
+};
+/**
+ * Provide a default value if a setting is undefined
+ * NOTE: Couldn't use `T` as the output type due to facebook/flow#5022.
+ */
+
+
+var deflt = function deflt(setting, defaultIfUndefined) {
+  return setting === undefined ? defaultIfUndefined : setting;
+}; // hyphenate and escape adapted from Facebook's React under Apache 2 license
+
+
+var uppercase = /([A-Z])/g;
+
+var hyphenate = function hyphenate(str) {
+  return str.replace(uppercase, "-$1").toLowerCase();
+};
+
+var ESCAPE_LOOKUP = {
+  "&": "&",
+  ">": ">",
+  "<": "<",
+  "\"": """,
+  "'": "'"
+};
+var ESCAPE_REGEX = /[&><"']/g;
+/**
+ * Escapes text to prevent scripting attacks.
+ */
+
+function utils_escape(text) {
+  return String(text).replace(ESCAPE_REGEX, function (match) {
+    return ESCAPE_LOOKUP[match];
+  });
+}
+/**
+ * Sometimes we want to pull out the innermost element of a group. In most
+ * cases, this will just be the group itself, but when ordgroups and colors have
+ * a single element, we want to pull that out.
+ */
+
+
+var getBaseElem = function getBaseElem(group) {
+  if (group.type === "ordgroup") {
+    if (group.body.length === 1) {
+      return getBaseElem(group.body[0]);
+    } else {
+      return group;
+    }
+  } else if (group.type === "color") {
+    if (group.body.length === 1) {
+      return getBaseElem(group.body[0]);
+    } else {
+      return group;
+    }
+  } else if (group.type === "font") {
+    return getBaseElem(group.body);
+  } else {
+    return group;
+  }
+};
+/**
+ * TeXbook algorithms often reference "character boxes", which are simply groups
+ * with a single character in them. To decide if something is a character box,
+ * we find its innermost group, and see if it is a single character.
+ */
+
+
+var isCharacterBox = function isCharacterBox(group) {
+  var baseElem = getBaseElem(group); // These are all they types of groups which hold single characters
+
+  return baseElem.type === "mathord" || baseElem.type === "textord" || baseElem.type === "atom";
+};
+
+var assert = function assert(value) {
+  if (!value) {
+    throw new Error('Expected non-null, but got ' + String(value));
+  }
+
+  return value;
+};
+/**
+ * Return the protocol of a URL, or "_relative" if the URL does not specify a
+ * protocol (and thus is relative).
+ */
+
+var protocolFromUrl = function protocolFromUrl(url) {
+  var protocol = /^\s*([^\\/#]*?)(?::|�*58|�*3a)/i.exec(url);
+  return protocol != null ? protocol[1] : "_relative";
+};
+/* harmony default export */ var utils = ({
+  contains: contains,
+  deflt: deflt,
+  escape: utils_escape,
+  hyphenate: hyphenate,
+  getBaseElem: getBaseElem,
+  isCharacterBox: isCharacterBox,
+  protocolFromUrl: protocolFromUrl
+});
+;// CONCATENATED MODULE: ./src/Settings.js
+/* eslint no-console:0 */
+
+/**
+ * This is a module for storing settings passed into KaTeX. It correctly handles
+ * default settings.
+ */
+
+
+
+// TODO: automatically generate documentation
+// TODO: check all properties on Settings exist
+// TODO: check the type of a property on Settings matches
+var SETTINGS_SCHEMA = {
+  displayMode: {
+    type: "boolean",
+    description: "Render math in display mode, which puts the math in " + "display style (so \\int and \\sum are large, for example), and " + "centers the math on the page on its own line.",
+    cli: "-d, --display-mode"
+  },
+  output: {
+    type: {
+      enum: ["htmlAndMathml", "html", "mathml"]
+    },
+    description: "Determines the markup language of the output.",
+    cli: "-F, --format "
+  },
+  leqno: {
+    type: "boolean",
+    description: "Render display math in leqno style (left-justified tags)."
+  },
+  fleqn: {
+    type: "boolean",
+    description: "Render display math flush left."
+  },
+  throwOnError: {
+    type: "boolean",
+    default: true,
+    cli: "-t, --no-throw-on-error",
+    cliDescription: "Render errors (in the color given by --error-color) ins" + "tead of throwing a ParseError exception when encountering an error."
+  },
+  errorColor: {
+    type: "string",
+    default: "#cc0000",
+    cli: "-c, --error-color ",
+    cliDescription: "A color string given in the format 'rgb' or 'rrggbb' " + "(no #). This option determines the color of errors rendered by the " + "-t option.",
+    cliProcessor: function cliProcessor(color) {
+      return "#" + color;
+    }
+  },
+  macros: {
+    type: "object",
+    cli: "-m, --macro ",
+    cliDescription: "Define custom macro of the form '\\foo:expansion' (use " + "multiple -m arguments for multiple macros).",
+    cliDefault: [],
+    cliProcessor: function cliProcessor(def, defs) {
+      defs.push(def);
+      return defs;
+    }
+  },
+  minRuleThickness: {
+    type: "number",
+    description: "Specifies a minimum thickness, in ems, for fraction lines," + " `\\sqrt` top lines, `{array}` vertical lines, `\\hline`, " + "`\\hdashline`, `\\underline`, `\\overline`, and the borders of " + "`\\fbox`, `\\boxed`, and `\\fcolorbox`.",
+    processor: function processor(t) {
+      return Math.max(0, t);
+    },
+    cli: "--min-rule-thickness ",
+    cliProcessor: parseFloat
+  },
+  colorIsTextColor: {
+    type: "boolean",
+    description: "Makes \\color behave like LaTeX's 2-argument \\textcolor, " + "instead of LaTeX's one-argument \\color mode change.",
+    cli: "-b, --color-is-text-color"
+  },
+  strict: {
+    type: [{
+      enum: ["warn", "ignore", "error"]
+    }, "boolean", "function"],
+    description: "Turn on strict / LaTeX faithfulness mode, which throws an " + "error if the input uses features that are not supported by LaTeX.",
+    cli: "-S, --strict",
+    cliDefault: false
+  },
+  trust: {
+    type: ["boolean", "function"],
+    description: "Trust the input, enabling all HTML features such as \\url.",
+    cli: "-T, --trust"
+  },
+  maxSize: {
+    type: "number",
+    default: Infinity,
+    description: "If non-zero, all user-specified sizes, e.g. in " + "\\rule{500em}{500em}, will be capped to maxSize ems. Otherwise, " + "elements and spaces can be arbitrarily large",
+    processor: function processor(s) {
+      return Math.max(0, s);
+    },
+    cli: "-s, --max-size ",
+    cliProcessor: parseInt
+  },
+  maxExpand: {
+    type: "number",
+    default: 1000,
+    description: "Limit the number of macro expansions to the specified " + "number, to prevent e.g. infinite macro loops. If set to Infinity, " + "the macro expander will try to fully expand as in LaTeX.",
+    processor: function processor(n) {
+      return Math.max(0, n);
+    },
+    cli: "-e, --max-expand ",
+    cliProcessor: function cliProcessor(n) {
+      return n === "Infinity" ? Infinity : parseInt(n);
+    }
+  },
+  globalGroup: {
+    type: "boolean",
+    cli: false
+  }
+};
+
+function getDefaultValue(schema) {
+  if (schema.default) {
+    return schema.default;
+  }
+
+  var type = schema.type;
+  var defaultType = Array.isArray(type) ? type[0] : type;
+
+  if (typeof defaultType !== 'string') {
+    return defaultType.enum[0];
+  }
+
+  switch (defaultType) {
+    case 'boolean':
+      return false;
+
+    case 'string':
+      return '';
+
+    case 'number':
+      return 0;
+
+    case 'object':
+      return {};
+  }
+}
+/**
+ * The main Settings object
+ *
+ * The current options stored are:
+ *  - displayMode: Whether the expression should be typeset as inline math
+ *                 (false, the default), meaning that the math starts in
+ *                 \textstyle and is placed in an inline-block); or as display
+ *                 math (true), meaning that the math starts in \displaystyle
+ *                 and is placed in a block with vertical margin.
+ */
+
+
+var Settings = /*#__PURE__*/function () {
+  function Settings(options) {
+    this.displayMode = void 0;
+    this.output = void 0;
+    this.leqno = void 0;
+    this.fleqn = void 0;
+    this.throwOnError = void 0;
+    this.errorColor = void 0;
+    this.macros = void 0;
+    this.minRuleThickness = void 0;
+    this.colorIsTextColor = void 0;
+    this.strict = void 0;
+    this.trust = void 0;
+    this.maxSize = void 0;
+    this.maxExpand = void 0;
+    this.globalGroup = void 0;
+    // allow null options
+    options = options || {};
+
+    for (var prop in SETTINGS_SCHEMA) {
+      if (SETTINGS_SCHEMA.hasOwnProperty(prop)) {
+        // $FlowFixMe
+        var schema = SETTINGS_SCHEMA[prop]; // TODO: validate options
+        // $FlowFixMe
+
+        this[prop] = options[prop] !== undefined ? schema.processor ? schema.processor(options[prop]) : options[prop] : getDefaultValue(schema);
+      }
+    }
+  }
+  /**
+   * Report nonstrict (non-LaTeX-compatible) input.
+   * Can safely not be called if `this.strict` is false in JavaScript.
+   */
+
+
+  var _proto = Settings.prototype;
+
+  _proto.reportNonstrict = function reportNonstrict(errorCode, errorMsg, token) {
+    var strict = this.strict;
+
+    if (typeof strict === "function") {
+      // Allow return value of strict function to be boolean or string
+      // (or null/undefined, meaning no further processing).
+      strict = strict(errorCode, errorMsg, token);
+    }
+
+    if (!strict || strict === "ignore") {
+      return;
+    } else if (strict === true || strict === "error") {
+      throw new src_ParseError("LaTeX-incompatible input and strict mode is set to 'error': " + (errorMsg + " [" + errorCode + "]"), token);
+    } else if (strict === "warn") {
+      typeof console !== "undefined" && console.warn("LaTeX-incompatible input and strict mode is set to 'warn': " + (errorMsg + " [" + errorCode + "]"));
+    } else {
+      // won't happen in type-safe code
+      typeof console !== "undefined" && console.warn("LaTeX-incompatible input and strict mode is set to " + ("unrecognized '" + strict + "': " + errorMsg + " [" + errorCode + "]"));
+    }
+  }
+  /**
+   * Check whether to apply strict (LaTeX-adhering) behavior for unusual
+   * input (like `\\`).  Unlike `nonstrict`, will not throw an error;
+   * instead, "error" translates to a return value of `true`, while "ignore"
+   * translates to a return value of `false`.  May still print a warning:
+   * "warn" prints a warning and returns `false`.
+   * This is for the second category of `errorCode`s listed in the README.
+   */
+  ;
+
+  _proto.useStrictBehavior = function useStrictBehavior(errorCode, errorMsg, token) {
+    var strict = this.strict;
+
+    if (typeof strict === "function") {
+      // Allow return value of strict function to be boolean or string
+      // (or null/undefined, meaning no further processing).
+      // But catch any exceptions thrown by function, treating them
+      // like "error".
+      try {
+        strict = strict(errorCode, errorMsg, token);
+      } catch (error) {
+        strict = "error";
+      }
+    }
+
+    if (!strict || strict === "ignore") {
+      return false;
+    } else if (strict === true || strict === "error") {
+      return true;
+    } else if (strict === "warn") {
+      typeof console !== "undefined" && console.warn("LaTeX-incompatible input and strict mode is set to 'warn': " + (errorMsg + " [" + errorCode + "]"));
+      return false;
+    } else {
+      // won't happen in type-safe code
+      typeof console !== "undefined" && console.warn("LaTeX-incompatible input and strict mode is set to " + ("unrecognized '" + strict + "': " + errorMsg + " [" + errorCode + "]"));
+      return false;
+    }
+  }
+  /**
+   * Check whether to test potentially dangerous input, and return
+   * `true` (trusted) or `false` (untrusted).  The sole argument `context`
+   * should be an object with `command` field specifying the relevant LaTeX
+   * command (as a string starting with `\`), and any other arguments, etc.
+   * If `context` has a `url` field, a `protocol` field will automatically
+   * get added by this function (changing the specified object).
+   */
+  ;
+
+  _proto.isTrusted = function isTrusted(context) {
+    if (context.url && !context.protocol) {
+      context.protocol = utils.protocolFromUrl(context.url);
+    }
+
+    var trust = typeof this.trust === "function" ? this.trust(context) : this.trust;
+    return Boolean(trust);
+  };
+
+  return Settings;
+}();
+
+
+;// CONCATENATED MODULE: ./src/Style.js
+/**
+ * This file contains information and classes for the various kinds of styles
+ * used in TeX. It provides a generic `Style` class, which holds information
+ * about a specific style. It then provides instances of all the different kinds
+ * of styles possible, and provides functions to move between them and get
+ * information about them.
+ */
+
+/**
+ * The main style class. Contains a unique id for the style, a size (which is
+ * the same for cramped and uncramped version of a style), and a cramped flag.
+ */
+var Style = /*#__PURE__*/function () {
+  function Style(id, size, cramped) {
+    this.id = void 0;
+    this.size = void 0;
+    this.cramped = void 0;
+    this.id = id;
+    this.size = size;
+    this.cramped = cramped;
+  }
+  /**
+   * Get the style of a superscript given a base in the current style.
+   */
+
+
+  var _proto = Style.prototype;
+
+  _proto.sup = function sup() {
+    return styles[_sup[this.id]];
+  }
+  /**
+   * Get the style of a subscript given a base in the current style.
+   */
+  ;
+
+  _proto.sub = function sub() {
+    return styles[_sub[this.id]];
+  }
+  /**
+   * Get the style of a fraction numerator given the fraction in the current
+   * style.
+   */
+  ;
+
+  _proto.fracNum = function fracNum() {
+    return styles[_fracNum[this.id]];
+  }
+  /**
+   * Get the style of a fraction denominator given the fraction in the current
+   * style.
+   */
+  ;
+
+  _proto.fracDen = function fracDen() {
+    return styles[_fracDen[this.id]];
+  }
+  /**
+   * Get the cramped version of a style (in particular, cramping a cramped style
+   * doesn't change the style).
+   */
+  ;
+
+  _proto.cramp = function cramp() {
+    return styles[_cramp[this.id]];
+  }
+  /**
+   * Get a text or display version of this style.
+   */
+  ;
+
+  _proto.text = function text() {
+    return styles[_text[this.id]];
+  }
+  /**
+   * Return true if this style is tightly spaced (scriptstyle/scriptscriptstyle)
+   */
+  ;
+
+  _proto.isTight = function isTight() {
+    return this.size >= 2;
+  };
+
+  return Style;
+}(); // Export an interface for type checking, but don't expose the implementation.
+// This way, no more styles can be generated.
+
+
+// IDs of the different styles
+var D = 0;
+var Dc = 1;
+var T = 2;
+var Tc = 3;
+var S = 4;
+var Sc = 5;
+var SS = 6;
+var SSc = 7; // Instances of the different styles
+
+var styles = [new Style(D, 0, false), new Style(Dc, 0, true), new Style(T, 1, false), new Style(Tc, 1, true), new Style(S, 2, false), new Style(Sc, 2, true), new Style(SS, 3, false), new Style(SSc, 3, true)]; // Lookup tables for switching from one style to another
+
+var _sup = [S, Sc, S, Sc, SS, SSc, SS, SSc];
+var _sub = [Sc, Sc, Sc, Sc, SSc, SSc, SSc, SSc];
+var _fracNum = [T, Tc, S, Sc, SS, SSc, SS, SSc];
+var _fracDen = [Tc, Tc, Sc, Sc, SSc, SSc, SSc, SSc];
+var _cramp = [Dc, Dc, Tc, Tc, Sc, Sc, SSc, SSc];
+var _text = [D, Dc, T, Tc, T, Tc, T, Tc]; // We only export some of the styles.
+
+/* harmony default export */ var src_Style = ({
+  DISPLAY: styles[D],
+  TEXT: styles[T],
+  SCRIPT: styles[S],
+  SCRIPTSCRIPT: styles[SS]
+});
+;// CONCATENATED MODULE: ./src/unicodeScripts.js
+/*
+ * This file defines the Unicode scripts and script families that we
+ * support. To add new scripts or families, just add a new entry to the
+ * scriptData array below. Adding scripts to the scriptData array allows
+ * characters from that script to appear in \text{} environments.
+ */
+
+/**
+ * Each script or script family has a name and an array of blocks.
+ * Each block is an array of two numbers which specify the start and
+ * end points (inclusive) of a block of Unicode codepoints.
+ */
+
+/**
+ * Unicode block data for the families of scripts we support in \text{}.
+ * Scripts only need to appear here if they do not have font metrics.
+ */
+var scriptData = [{
+  // Latin characters beyond the Latin-1 characters we have metrics for.
+  // Needed for Czech, Hungarian and Turkish text, for example.
+  name: 'latin',
+  blocks: [[0x0100, 0x024f], // Latin Extended-A and Latin Extended-B
+  [0x0300, 0x036f] // Combining Diacritical marks
+  ]
+}, {
+  // The Cyrillic script used by Russian and related languages.
+  // A Cyrillic subset used to be supported as explicitly defined
+  // symbols in symbols.js
+  name: 'cyrillic',
+  blocks: [[0x0400, 0x04ff]]
+}, {
+  // Armenian
+  name: 'armenian',
+  blocks: [[0x0530, 0x058F]]
+}, {
+  // The Brahmic scripts of South and Southeast Asia
+  // Devanagari (0900–097F)
+  // Bengali (0980–09FF)
+  // Gurmukhi (0A00–0A7F)
+  // Gujarati (0A80–0AFF)
+  // Oriya (0B00–0B7F)
+  // Tamil (0B80–0BFF)
+  // Telugu (0C00–0C7F)
+  // Kannada (0C80–0CFF)
+  // Malayalam (0D00–0D7F)
+  // Sinhala (0D80–0DFF)
+  // Thai (0E00–0E7F)
+  // Lao (0E80–0EFF)
+  // Tibetan (0F00–0FFF)
+  // Myanmar (1000–109F)
+  name: 'brahmic',
+  blocks: [[0x0900, 0x109F]]
+}, {
+  name: 'georgian',
+  blocks: [[0x10A0, 0x10ff]]
+}, {
+  // Chinese and Japanese.
+  // The "k" in cjk is for Korean, but we've separated Korean out
+  name: "cjk",
+  blocks: [[0x3000, 0x30FF], // CJK symbols and punctuation, Hiragana, Katakana
+  [0x4E00, 0x9FAF], // CJK ideograms
+  [0xFF00, 0xFF60] // Fullwidth punctuation
+  // TODO: add halfwidth Katakana and Romanji glyphs
+  ]
+}, {
+  // Korean
+  name: 'hangul',
+  blocks: [[0xAC00, 0xD7AF]]
+}];
+/**
+ * Given a codepoint, return the name of the script or script family
+ * it is from, or null if it is not part of a known block
+ */
+
+function scriptFromCodepoint(codepoint) {
+  for (var i = 0; i < scriptData.length; i++) {
+    var script = scriptData[i];
+
+    for (var _i = 0; _i < script.blocks.length; _i++) {
+      var block = script.blocks[_i];
+
+      if (codepoint >= block[0] && codepoint <= block[1]) {
+        return script.name;
+      }
+    }
+  }
+
+  return null;
+}
+/**
+ * A flattened version of all the supported blocks in a single array.
+ * This is an optimization to make supportedCodepoint() fast.
+ */
+
+var allBlocks = [];
+scriptData.forEach(function (s) {
+  return s.blocks.forEach(function (b) {
+    return allBlocks.push.apply(allBlocks, b);
+  });
+});
+/**
+ * Given a codepoint, return true if it falls within one of the
+ * scripts or script families defined above and false otherwise.
+ *
+ * Micro benchmarks shows that this is faster than
+ * /[\u3000-\u30FF\u4E00-\u9FAF\uFF00-\uFF60\uAC00-\uD7AF\u0900-\u109F]/.test()
+ * in Firefox, Chrome and Node.
+ */
+
+function supportedCodepoint(codepoint) {
+  for (var i = 0; i < allBlocks.length; i += 2) {
+    if (codepoint >= allBlocks[i] && codepoint <= allBlocks[i + 1]) {
+      return true;
+    }
+  }
+
+  return false;
+}
+;// CONCATENATED MODULE: ./src/svgGeometry.js
+/**
+ * This file provides support to domTree.js and delimiter.js.
+ * It's a storehouse of path geometry for SVG images.
+ */
+// In all paths below, the viewBox-to-em scale is 1000:1.
+var hLinePad = 80; // padding above a sqrt vinculum. Prevents image cropping.
+// The vinculum of a \sqrt can be made thicker by a KaTeX rendering option.
+// Think of variable extraVinculum as two detours in the SVG path.
+// The detour begins at the lower left of the area labeled extraVinculum below.
+// The detour proceeds one extraVinculum distance up and slightly to the right,
+// displacing the radiused corner between surd and vinculum. The radius is
+// traversed as usual, then the detour resumes. It goes right, to the end of
+// the very long vinculum, then down one extraVinculum distance,
+// after which it resumes regular path geometry for the radical.
+
+/*                                                  vinculum
+                                                   /
+         /▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒←extraVinculum
+        / █████████████████████←0.04em (40 unit) std vinculum thickness
+       / /
+      / /
+     / /\
+    / / surd
+*/
+
+var sqrtMain = function sqrtMain(extraVinculum, hLinePad) {
+  // sqrtMain path geometry is from glyph U221A in the font KaTeX Main
+  return "M95," + (622 + extraVinculum + hLinePad) + "\nc-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5,-10,-9.5,-14\nc0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54\nc44.2,-33.3,65.8,-50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10\ns173,378,173,378c0.7,0,35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429\nc69,-144,104.5,-217.7,106.5,-221\nl" + extraVinculum / 2.075 + " -" + extraVinculum + "\nc5.3,-9.3,12,-14,20,-14\nH400000v" + (40 + extraVinculum) + "H845.2724\ns-225.272,467,-225.272,467s-235,486,-235,486c-2.7,4.7,-9,7,-19,7\nc-6,0,-10,-1,-12,-3s-194,-422,-194,-422s-65,47,-65,47z\nM" + (834 + extraVinculum) + " " + hLinePad + "h400000v" + (40 + extraVinculum) + "h-400000z";
+};
+
+var sqrtSize1 = function sqrtSize1(extraVinculum, hLinePad) {
+  // size1 is from glyph U221A in the font KaTeX_Size1-Regular
+  return "M263," + (601 + extraVinculum + hLinePad) + "c0.7,0,18,39.7,52,119\nc34,79.3,68.167,158.7,102.5,238c34.3,79.3,51.8,119.3,52.5,120\nc340,-704.7,510.7,-1060.3,512,-1067\nl" + extraVinculum / 2.084 + " -" + extraVinculum + "\nc4.7,-7.3,11,-11,19,-11\nH40000v" + (40 + extraVinculum) + "H1012.3\ns-271.3,567,-271.3,567c-38.7,80.7,-84,175,-136,283c-52,108,-89.167,185.3,-111.5,232\nc-22.3,46.7,-33.8,70.3,-34.5,71c-4.7,4.7,-12.3,7,-23,7s-12,-1,-12,-1\ns-109,-253,-109,-253c-72.7,-168,-109.3,-252,-110,-252c-10.7,8,-22,16.7,-34,26\nc-22,17.3,-33.3,26,-34,26s-26,-26,-26,-26s76,-59,76,-59s76,-60,76,-60z\nM" + (1001 + extraVinculum) + " " + hLinePad + "h400000v" + (40 + extraVinculum) + "h-400000z";
+};
+
+var sqrtSize2 = function sqrtSize2(extraVinculum, hLinePad) {
+  // size2 is from glyph U221A in the font KaTeX_Size2-Regular
+  return "M983 " + (10 + extraVinculum + hLinePad) + "\nl" + extraVinculum / 3.13 + " -" + extraVinculum + "\nc4,-6.7,10,-10,18,-10 H400000v" + (40 + extraVinculum) + "\nH1013.1s-83.4,268,-264.1,840c-180.7,572,-277,876.3,-289,913c-4.7,4.7,-12.7,7,-24,7\ns-12,0,-12,0c-1.3,-3.3,-3.7,-11.7,-7,-25c-35.3,-125.3,-106.7,-373.3,-214,-744\nc-10,12,-21,25,-33,39s-32,39,-32,39c-6,-5.3,-15,-14,-27,-26s25,-30,25,-30\nc26.7,-32.7,52,-63,76,-91s52,-60,52,-60s208,722,208,722\nc56,-175.3,126.3,-397.3,211,-666c84.7,-268.7,153.8,-488.2,207.5,-658.5\nc53.7,-170.3,84.5,-266.8,92.5,-289.5z\nM" + (1001 + extraVinculum) + " " + hLinePad + "h400000v" + (40 + extraVinculum) + "h-400000z";
+};
+
+var sqrtSize3 = function sqrtSize3(extraVinculum, hLinePad) {
+  // size3 is from glyph U221A in the font KaTeX_Size3-Regular
+  return "M424," + (2398 + extraVinculum + hLinePad) + "\nc-1.3,-0.7,-38.5,-172,-111.5,-514c-73,-342,-109.8,-513.3,-110.5,-514\nc0,-2,-10.7,14.3,-32,49c-4.7,7.3,-9.8,15.7,-15.5,25c-5.7,9.3,-9.8,16,-12.5,20\ns-5,7,-5,7c-4,-3.3,-8.3,-7.7,-13,-13s-13,-13,-13,-13s76,-122,76,-122s77,-121,77,-121\ns209,968,209,968c0,-2,84.7,-361.7,254,-1079c169.3,-717.3,254.7,-1077.7,256,-1081\nl" + extraVinculum / 4.223 + " -" + extraVinculum + "c4,-6.7,10,-10,18,-10 H400000\nv" + (40 + extraVinculum) + "H1014.6\ns-87.3,378.7,-272.6,1166c-185.3,787.3,-279.3,1182.3,-282,1185\nc-2,6,-10,9,-24,9\nc-8,0,-12,-0.7,-12,-2z M" + (1001 + extraVinculum) + " " + hLinePad + "\nh400000v" + (40 + extraVinculum) + "h-400000z";
+};
+
+var sqrtSize4 = function sqrtSize4(extraVinculum, hLinePad) {
+  // size4 is from glyph U221A in the font KaTeX_Size4-Regular
+  return "M473," + (2713 + extraVinculum + hLinePad) + "\nc339.3,-1799.3,509.3,-2700,510,-2702 l" + extraVinculum / 5.298 + " -" + extraVinculum + "\nc3.3,-7.3,9.3,-11,18,-11 H400000v" + (40 + extraVinculum) + "H1017.7\ns-90.5,478,-276.2,1466c-185.7,988,-279.5,1483,-281.5,1485c-2,6,-10,9,-24,9\nc-8,0,-12,-0.7,-12,-2c0,-1.3,-5.3,-32,-16,-92c-50.7,-293.3,-119.7,-693.3,-207,-1200\nc0,-1.3,-5.3,8.7,-16,30c-10.7,21.3,-21.3,42.7,-32,64s-16,33,-16,33s-26,-26,-26,-26\ns76,-153,76,-153s77,-151,77,-151c0.7,0.7,35.7,202,105,604c67.3,400.7,102,602.7,104,\n606zM" + (1001 + extraVinculum) + " " + hLinePad + "h400000v" + (40 + extraVinculum) + "H1017.7z";
+};
+
+var phasePath = function phasePath(y) {
+  var x = y / 2; // x coordinate at top of angle
+
+  return "M400000 " + y + " H0 L" + x + " 0 l65 45 L145 " + (y - 80) + " H400000z";
+};
+
+var sqrtTall = function sqrtTall(extraVinculum, hLinePad, viewBoxHeight) {
+  // sqrtTall is from glyph U23B7 in the font KaTeX_Size4-Regular
+  // One path edge has a variable length. It runs vertically from the vinculum
+  // to a point near (14 units) the bottom of the surd. The vinculum
+  // is normally 40 units thick. So the length of the line in question is:
+  var vertSegment = viewBoxHeight - 54 - hLinePad - extraVinculum;
+  return "M702 " + (extraVinculum + hLinePad) + "H400000" + (40 + extraVinculum) + "\nH742v" + vertSegment + "l-4 4-4 4c-.667.7 -2 1.5-4 2.5s-4.167 1.833-6.5 2.5-5.5 1-9.5 1\nh-12l-28-84c-16.667-52-96.667 -294.333-240-727l-212 -643 -85 170\nc-4-3.333-8.333-7.667-13 -13l-13-13l77-155 77-156c66 199.333 139 419.667\n219 661 l218 661zM702 " + hLinePad + "H400000v" + (40 + extraVinculum) + "H742z";
+};
+
+var sqrtPath = function sqrtPath(size, extraVinculum, viewBoxHeight) {
+  extraVinculum = 1000 * extraVinculum; // Convert from document ems to viewBox.
+
+  var path = "";
+
+  switch (size) {
+    case "sqrtMain":
+      path = sqrtMain(extraVinculum, hLinePad);
+      break;
+
+    case "sqrtSize1":
+      path = sqrtSize1(extraVinculum, hLinePad);
+      break;
+
+    case "sqrtSize2":
+      path = sqrtSize2(extraVinculum, hLinePad);
+      break;
+
+    case "sqrtSize3":
+      path = sqrtSize3(extraVinculum, hLinePad);
+      break;
+
+    case "sqrtSize4":
+      path = sqrtSize4(extraVinculum, hLinePad);
+      break;
+
+    case "sqrtTall":
+      path = sqrtTall(extraVinculum, hLinePad, viewBoxHeight);
+  }
+
+  return path;
+};
+var innerPath = function innerPath(name, height) {
+  // The inner part of stretchy tall delimiters
+  switch (name) {
+    case "\u239C":
+      return "M291 0 H417 V" + height + " H291z M291 0 H417 V" + height + " H291z";
+
+    case "\u2223":
+      return "M145 0 H188 V" + height + " H145z M145 0 H188 V" + height + " H145z";
+
+    case "\u2225":
+      return "M145 0 H188 V" + height + " H145z M145 0 H188 V" + height + " H145z" + ("M367 0 H410 V" + height + " H367z M367 0 H410 V" + height + " H367z");
+
+    case "\u239F":
+      return "M457 0 H583 V" + height + " H457z M457 0 H583 V" + height + " H457z";
+
+    case "\u23A2":
+      return "M319 0 H403 V" + height + " H319z M319 0 H403 V" + height + " H319z";
+
+    case "\u23A5":
+      return "M263 0 H347 V" + height + " H263z M263 0 H347 V" + height + " H263z";
+
+    case "\u23AA":
+      return "M384 0 H504 V" + height + " H384z M384 0 H504 V" + height + " H384z";
+
+    case "\u23D0":
+      return "M312 0 H355 V" + height + " H312z M312 0 H355 V" + height + " H312z";
+
+    case "\u2016":
+      return "M257 0 H300 V" + height + " H257z M257 0 H300 V" + height + " H257z" + ("M478 0 H521 V" + height + " H478z M478 0 H521 V" + height + " H478z");
+
+    default:
+      return "";
+  }
+};
+var path = {
+  // The doubleleftarrow geometry is from glyph U+21D0 in the font KaTeX Main
+  doubleleftarrow: "M262 157\nl10-10c34-36 62.7-77 86-123 3.3-8 5-13.3 5-16 0-5.3-6.7-8-20-8-7.3\n 0-12.2.5-14.5 1.5-2.3 1-4.8 4.5-7.5 10.5-49.3 97.3-121.7 169.3-217 216-28\n 14-57.3 25-88 33-6.7 2-11 3.8-13 5.5-2 1.7-3 4.2-3 7.5s1 5.8 3 7.5\nc2 1.7 6.3 3.5 13 5.5 68 17.3 128.2 47.8 180.5 91.5 52.3 43.7 93.8 96.2 124.5\n 157.5 9.3 8 15.3 12.3 18 13h6c12-.7 18-4 18-10 0-2-1.7-7-5-15-23.3-46-52-87\n-86-123l-10-10h399738v-40H218c328 0 0 0 0 0l-10-8c-26.7-20-65.7-43-117-69 2.7\n-2 6-3.7 10-5 36.7-16 72.3-37.3 107-64l10-8h399782v-40z\nm8 0v40h399730v-40zm0 194v40h399730v-40z",
+  // doublerightarrow is from glyph U+21D2 in font KaTeX Main
+  doublerightarrow: "M399738 392l\n-10 10c-34 36-62.7 77-86 123-3.3 8-5 13.3-5 16 0 5.3 6.7 8 20 8 7.3 0 12.2-.5\n 14.5-1.5 2.3-1 4.8-4.5 7.5-10.5 49.3-97.3 121.7-169.3 217-216 28-14 57.3-25 88\n-33 6.7-2 11-3.8 13-5.5 2-1.7 3-4.2 3-7.5s-1-5.8-3-7.5c-2-1.7-6.3-3.5-13-5.5-68\n-17.3-128.2-47.8-180.5-91.5-52.3-43.7-93.8-96.2-124.5-157.5-9.3-8-15.3-12.3-18\n-13h-6c-12 .7-18 4-18 10 0 2 1.7 7 5 15 23.3 46 52 87 86 123l10 10H0v40h399782\nc-328 0 0 0 0 0l10 8c26.7 20 65.7 43 117 69-2.7 2-6 3.7-10 5-36.7 16-72.3 37.3\n-107 64l-10 8H0v40zM0 157v40h399730v-40zm0 194v40h399730v-40z",
+  // leftarrow is from glyph U+2190 in font KaTeX Main
+  leftarrow: "M400000 241H110l3-3c68.7-52.7 113.7-120\n 135-202 4-14.7 6-23 6-25 0-7.3-7-11-21-11-8 0-13.2.8-15.5 2.5-2.3 1.7-4.2 5.8\n-5.5 12.5-1.3 4.7-2.7 10.3-4 17-12 48.7-34.8 92-68.5 130S65.3 228.3 18 247\nc-10 4-16 7.7-18 11 0 8.7 6 14.3 18 17 47.3 18.7 87.8 47 121.5 85S196 441.3 208\n 490c.7 2 1.3 5 2 9s1.2 6.7 1.5 8c.3 1.3 1 3.3 2 6s2.2 4.5 3.5 5.5c1.3 1 3.3\n 1.8 6 2.5s6 1 10 1c14 0 21-3.7 21-11 0-2-2-10.3-6-25-20-79.3-65-146.7-135-202\n l-3-3h399890zM100 241v40h399900v-40z",
+  // overbrace is from glyphs U+23A9/23A8/23A7 in font KaTeX_Size4-Regular
+  leftbrace: "M6 548l-6-6v-35l6-11c56-104 135.3-181.3 238-232 57.3-28.7 117\n-45 179-50h399577v120H403c-43.3 7-81 15-113 26-100.7 33-179.7 91-237 174-2.7\n 5-6 9-10 13-.7 1-7.3 1-20 1H6z",
+  leftbraceunder: "M0 6l6-6h17c12.688 0 19.313.3 20 1 4 4 7.313 8.3 10 13\n 35.313 51.3 80.813 93.8 136.5 127.5 55.688 33.7 117.188 55.8 184.5 66.5.688\n 0 2 .3 4 1 18.688 2.7 76 4.3 172 5h399450v120H429l-6-1c-124.688-8-235-61.7\n-331-161C60.687 138.7 32.312 99.3 7 54L0 41V6z",
+  // overgroup is from the MnSymbol package (public domain)
+  leftgroup: "M400000 80\nH435C64 80 168.3 229.4 21 260c-5.9 1.2-18 0-18 0-2 0-3-1-3-3v-38C76 61 257 0\n 435 0h399565z",
+  leftgroupunder: "M400000 262\nH435C64 262 168.3 112.6 21 82c-5.9-1.2-18 0-18 0-2 0-3 1-3 3v38c76 158 257 219\n 435 219h399565z",
+  // Harpoons are from glyph U+21BD in font KaTeX Main
+  leftharpoon: "M0 267c.7 5.3 3 10 7 14h399993v-40H93c3.3\n-3.3 10.2-9.5 20.5-18.5s17.8-15.8 22.5-20.5c50.7-52 88-110.3 112-175 4-11.3 5\n-18.3 3-21-1.3-4-7.3-6-18-6-8 0-13 .7-15 2s-4.7 6.7-8 16c-42 98.7-107.3 174.7\n-196 228-6.7 4.7-10.7 8-12 10-1.3 2-2 5.7-2 11zm100-26v40h399900v-40z",
+  leftharpoonplus: "M0 267c.7 5.3 3 10 7 14h399993v-40H93c3.3-3.3 10.2-9.5\n 20.5-18.5s17.8-15.8 22.5-20.5c50.7-52 88-110.3 112-175 4-11.3 5-18.3 3-21-1.3\n-4-7.3-6-18-6-8 0-13 .7-15 2s-4.7 6.7-8 16c-42 98.7-107.3 174.7-196 228-6.7 4.7\n-10.7 8-12 10-1.3 2-2 5.7-2 11zm100-26v40h399900v-40zM0 435v40h400000v-40z\nm0 0v40h400000v-40z",
+  leftharpoondown: "M7 241c-4 4-6.333 8.667-7 14 0 5.333.667 9 2 11s5.333\n 5.333 12 10c90.667 54 156 130 196 228 3.333 10.667 6.333 16.333 9 17 2 .667 5\n 1 9 1h5c10.667 0 16.667-2 18-6 2-2.667 1-9.667-3-21-32-87.333-82.667-157.667\n-152-211l-3-3h399907v-40zM93 281 H400000 v-40L7 241z",
+  leftharpoondownplus: "M7 435c-4 4-6.3 8.7-7 14 0 5.3.7 9 2 11s5.3 5.3 12\n 10c90.7 54 156 130 196 228 3.3 10.7 6.3 16.3 9 17 2 .7 5 1 9 1h5c10.7 0 16.7\n-2 18-6 2-2.7 1-9.7-3-21-32-87.3-82.7-157.7-152-211l-3-3h399907v-40H7zm93 0\nv40h399900v-40zM0 241v40h399900v-40zm0 0v40h399900v-40z",
+  // hook is from glyph U+21A9 in font KaTeX Main
+  lefthook: "M400000 281 H103s-33-11.2-61-33.5S0 197.3 0 164s14.2-61.2 42.5\n-83.5C70.8 58.2 104 47 142 47 c16.7 0 25 6.7 25 20 0 12-8.7 18.7-26 20-40 3.3\n-68.7 15.7-86 37-10 12-15 25.3-15 40 0 22.7 9.8 40.7 29.5 54 19.7 13.3 43.5 21\n 71.5 23h399859zM103 281v-40h399897v40z",
+  leftlinesegment: "M40 281 V428 H0 V94 H40 V241 H400000 v40z\nM40 281 V428 H0 V94 H40 V241 H400000 v40z",
+  leftmapsto: "M40 281 V448H0V74H40V241H400000v40z\nM40 281 V448H0V74H40V241H400000v40z",
+  // tofrom is from glyph U+21C4 in font KaTeX AMS Regular
+  leftToFrom: "M0 147h400000v40H0zm0 214c68 40 115.7 95.7 143 167h22c15.3 0 23\n-.3 23-1 0-1.3-5.3-13.7-16-37-18-35.3-41.3-69-70-101l-7-8h399905v-40H95l7-8\nc28.7-32 52-65.7 70-101 10.7-23.3 16-35.7 16-37 0-.7-7.7-1-23-1h-22C115.7 265.3\n 68 321 0 361zm0-174v-40h399900v40zm100 154v40h399900v-40z",
+  longequal: "M0 50 h400000 v40H0z m0 194h40000v40H0z\nM0 50 h400000 v40H0z m0 194h40000v40H0z",
+  midbrace: "M200428 334\nc-100.7-8.3-195.3-44-280-108-55.3-42-101.7-93-139-153l-9-14c-2.7 4-5.7 8.7-9 14\n-53.3 86.7-123.7 153-211 199-66.7 36-137.3 56.3-212 62H0V214h199568c178.3-11.7\n 311.7-78.3 403-201 6-8 9.7-12 11-12 .7-.7 6.7-1 18-1s17.3.3 18 1c1.3 0 5 4 11\n 12 44.7 59.3 101.3 106.3 170 141s145.3 54.3 229 60h199572v120z",
+  midbraceunder: "M199572 214\nc100.7 8.3 195.3 44 280 108 55.3 42 101.7 93 139 153l9 14c2.7-4 5.7-8.7 9-14\n 53.3-86.7 123.7-153 211-199 66.7-36 137.3-56.3 212-62h199568v120H200432c-178.3\n 11.7-311.7 78.3-403 201-6 8-9.7 12-11 12-.7.7-6.7 1-18 1s-17.3-.3-18-1c-1.3 0\n-5-4-11-12-44.7-59.3-101.3-106.3-170-141s-145.3-54.3-229-60H0V214z",
+  oiintSize1: "M512.6 71.6c272.6 0 320.3 106.8 320.3 178.2 0 70.8-47.7 177.6\n-320.3 177.6S193.1 320.6 193.1 249.8c0-71.4 46.9-178.2 319.5-178.2z\nm368.1 178.2c0-86.4-60.9-215.4-368.1-215.4-306.4 0-367.3 129-367.3 215.4 0 85.8\n60.9 214.8 367.3 214.8 307.2 0 368.1-129 368.1-214.8z",
+  oiintSize2: "M757.8 100.1c384.7 0 451.1 137.6 451.1 230 0 91.3-66.4 228.8\n-451.1 228.8-386.3 0-452.7-137.5-452.7-228.8 0-92.4 66.4-230 452.7-230z\nm502.4 230c0-111.2-82.4-277.2-502.4-277.2s-504 166-504 277.2\nc0 110 84 276 504 276s502.4-166 502.4-276z",
+  oiiintSize1: "M681.4 71.6c408.9 0 480.5 106.8 480.5 178.2 0 70.8-71.6 177.6\n-480.5 177.6S202.1 320.6 202.1 249.8c0-71.4 70.5-178.2 479.3-178.2z\nm525.8 178.2c0-86.4-86.8-215.4-525.7-215.4-437.9 0-524.7 129-524.7 215.4 0\n85.8 86.8 214.8 524.7 214.8 438.9 0 525.7-129 525.7-214.8z",
+  oiiintSize2: "M1021.2 53c603.6 0 707.8 165.8 707.8 277.2 0 110-104.2 275.8\n-707.8 275.8-606 0-710.2-165.8-710.2-275.8C311 218.8 415.2 53 1021.2 53z\nm770.4 277.1c0-131.2-126.4-327.6-770.5-327.6S248.4 198.9 248.4 330.1\nc0 130 128.8 326.4 772.7 326.4s770.5-196.4 770.5-326.4z",
+  rightarrow: "M0 241v40h399891c-47.3 35.3-84 78-110 128\n-16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20\n 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7\n 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85\n-40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5\n-12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67\n 151.7 139 205zm0 0v40h399900v-40z",
+  rightbrace: "M400000 542l\n-6 6h-17c-12.7 0-19.3-.3-20-1-4-4-7.3-8.3-10-13-35.3-51.3-80.8-93.8-136.5-127.5\ns-117.2-55.8-184.5-66.5c-.7 0-2-.3-4-1-18.7-2.7-76-4.3-172-5H0V214h399571l6 1\nc124.7 8 235 61.7 331 161 31.3 33.3 59.7 72.7 85 118l7 13v35z",
+  rightbraceunder: "M399994 0l6 6v35l-6 11c-56 104-135.3 181.3-238 232-57.3\n 28.7-117 45-179 50H-300V214h399897c43.3-7 81-15 113-26 100.7-33 179.7-91 237\n-174 2.7-5 6-9 10-13 .7-1 7.3-1 20-1h17z",
+  rightgroup: "M0 80h399565c371 0 266.7 149.4 414 180 5.9 1.2 18 0 18 0 2 0\n 3-1 3-3v-38c-76-158-257-219-435-219H0z",
+  rightgroupunder: "M0 262h399565c371 0 266.7-149.4 414-180 5.9-1.2 18 0 18\n 0 2 0 3 1 3 3v38c-76 158-257 219-435 219H0z",
+  rightharpoon: "M0 241v40h399993c4.7-4.7 7-9.3 7-14 0-9.3\n-3.7-15.3-11-18-92.7-56.7-159-133.7-199-231-3.3-9.3-6-14.7-8-16-2-1.3-7-2-15-2\n-10.7 0-16.7 2-18 6-2 2.7-1 9.7 3 21 15.3 42 36.7 81.8 64 119.5 27.3 37.7 58\n 69.2 92 94.5zm0 0v40h399900v-40z",
+  rightharpoonplus: "M0 241v40h399993c4.7-4.7 7-9.3 7-14 0-9.3-3.7-15.3-11\n-18-92.7-56.7-159-133.7-199-231-3.3-9.3-6-14.7-8-16-2-1.3-7-2-15-2-10.7 0-16.7\n 2-18 6-2 2.7-1 9.7 3 21 15.3 42 36.7 81.8 64 119.5 27.3 37.7 58 69.2 92 94.5z\nm0 0v40h399900v-40z m100 194v40h399900v-40zm0 0v40h399900v-40z",
+  rightharpoondown: "M399747 511c0 7.3 6.7 11 20 11 8 0 13-.8 15-2.5s4.7-6.8\n 8-15.5c40-94 99.3-166.3 178-217 13.3-8 20.3-12.3 21-13 5.3-3.3 8.5-5.8 9.5\n-7.5 1-1.7 1.5-5.2 1.5-10.5s-2.3-10.3-7-15H0v40h399908c-34 25.3-64.7 57-92 95\n-27.3 38-48.7 77.7-64 119-3.3 8.7-5 14-5 16zM0 241v40h399900v-40z",
+  rightharpoondownplus: "M399747 705c0 7.3 6.7 11 20 11 8 0 13-.8\n 15-2.5s4.7-6.8 8-15.5c40-94 99.3-166.3 178-217 13.3-8 20.3-12.3 21-13 5.3-3.3\n 8.5-5.8 9.5-7.5 1-1.7 1.5-5.2 1.5-10.5s-2.3-10.3-7-15H0v40h399908c-34 25.3\n-64.7 57-92 95-27.3 38-48.7 77.7-64 119-3.3 8.7-5 14-5 16zM0 435v40h399900v-40z\nm0-194v40h400000v-40zm0 0v40h400000v-40z",
+  righthook: "M399859 241c-764 0 0 0 0 0 40-3.3 68.7-15.7 86-37 10-12 15-25.3\n 15-40 0-22.7-9.8-40.7-29.5-54-19.7-13.3-43.5-21-71.5-23-17.3-1.3-26-8-26-20 0\n-13.3 8.7-20 26-20 38 0 71 11.2 99 33.5 0 0 7 5.6 21 16.7 14 11.2 21 33.5 21\n 66.8s-14 61.2-42 83.5c-28 22.3-61 33.5-99 33.5L0 241z M0 281v-40h399859v40z",
+  rightlinesegment: "M399960 241 V94 h40 V428 h-40 V281 H0 v-40z\nM399960 241 V94 h40 V428 h-40 V281 H0 v-40z",
+  rightToFrom: "M400000 167c-70.7-42-118-97.7-142-167h-23c-15.3 0-23 .3-23\n 1 0 1.3 5.3 13.7 16 37 18 35.3 41.3 69 70 101l7 8H0v40h399905l-7 8c-28.7 32\n-52 65.7-70 101-10.7 23.3-16 35.7-16 37 0 .7 7.7 1 23 1h23c24-69.3 71.3-125 142\n-167z M100 147v40h399900v-40zM0 341v40h399900v-40z",
+  // twoheadleftarrow is from glyph U+219E in font KaTeX AMS Regular
+  twoheadleftarrow: "M0 167c68 40\n 115.7 95.7 143 167h22c15.3 0 23-.3 23-1 0-1.3-5.3-13.7-16-37-18-35.3-41.3-69\n-70-101l-7-8h125l9 7c50.7 39.3 85 86 103 140h46c0-4.7-6.3-18.7-19-42-18-35.3\n-40-67.3-66-96l-9-9h399716v-40H284l9-9c26-28.7 48-60.7 66-96 12.7-23.333 19\n-37.333 19-42h-46c-18 54-52.3 100.7-103 140l-9 7H95l7-8c28.7-32 52-65.7 70-101\n 10.7-23.333 16-35.7 16-37 0-.7-7.7-1-23-1h-22C115.7 71.3 68 127 0 167z",
+  twoheadrightarrow: "M400000 167\nc-68-40-115.7-95.7-143-167h-22c-15.3 0-23 .3-23 1 0 1.3 5.3 13.7 16 37 18 35.3\n 41.3 69 70 101l7 8h-125l-9-7c-50.7-39.3-85-86-103-140h-46c0 4.7 6.3 18.7 19 42\n 18 35.3 40 67.3 66 96l9 9H0v40h399716l-9 9c-26 28.7-48 60.7-66 96-12.7 23.333\n-19 37.333-19 42h46c18-54 52.3-100.7 103-140l9-7h125l-7 8c-28.7 32-52 65.7-70\n 101-10.7 23.333-16 35.7-16 37 0 .7 7.7 1 23 1h22c27.3-71.3 75-127 143-167z",
+  // tilde1 is a modified version of a glyph from the MnSymbol package
+  tilde1: "M200 55.538c-77 0-168 73.953-177 73.953-3 0-7\n-2.175-9-5.437L2 97c-1-2-2-4-2-6 0-4 2-7 5-9l20-12C116 12 171 0 207 0c86 0\n 114 68 191 68 78 0 168-68 177-68 4 0 7 2 9 5l12 19c1 2.175 2 4.35 2 6.525 0\n 4.35-2 7.613-5 9.788l-19 13.05c-92 63.077-116.937 75.308-183 76.128\n-68.267.847-113-73.952-191-73.952z",
+  // ditto tilde2, tilde3, & tilde4
+  tilde2: "M344 55.266c-142 0-300.638 81.316-311.5 86.418\n-8.01 3.762-22.5 10.91-23.5 5.562L1 120c-1-2-1-3-1-4 0-5 3-9 8-10l18.4-9C160.9\n 31.9 283 0 358 0c148 0 188 122 331 122s314-97 326-97c4 0 8 2 10 7l7 21.114\nc1 2.14 1 3.21 1 4.28 0 5.347-3 9.626-7 10.696l-22.3 12.622C852.6 158.372 751\n 181.476 676 181.476c-149 0-189-126.21-332-126.21z",
+  tilde3: "M786 59C457 59 32 175.242 13 175.242c-6 0-10-3.457\n-11-10.37L.15 138c-1-7 3-12 10-13l19.2-6.4C378.4 40.7 634.3 0 804.3 0c337 0\n 411.8 157 746.8 157 328 0 754-112 773-112 5 0 10 3 11 9l1 14.075c1 8.066-.697\n 16.595-6.697 17.492l-21.052 7.31c-367.9 98.146-609.15 122.696-778.15 122.696\n -338 0-409-156.573-744-156.573z",
+  tilde4: "M786 58C457 58 32 177.487 13 177.487c-6 0-10-3.345\n-11-10.035L.15 143c-1-7 3-12 10-13l22-6.7C381.2 35 637.15 0 807.15 0c337 0 409\n 177 744 177 328 0 754-127 773-127 5 0 10 3 11 9l1 14.794c1 7.805-3 13.38-9\n 14.495l-20.7 5.574c-366.85 99.79-607.3 139.372-776.3 139.372-338 0-409\n -175.236-744-175.236z",
+  // vec is from glyph U+20D7 in font KaTeX Main
+  vec: "M377 20c0-5.333 1.833-10 5.5-14S391 0 397 0c4.667 0 8.667 1.667 12 5\n3.333 2.667 6.667 9 10 19 6.667 24.667 20.333 43.667 41 57 7.333 4.667 11\n10.667 11 18 0 6-1 10-3 12s-6.667 5-14 9c-28.667 14.667-53.667 35.667-75 63\n-1.333 1.333-3.167 3.5-5.5 6.5s-4 4.833-5 5.5c-1 .667-2.5 1.333-4.5 2s-4.333 1\n-7 1c-4.667 0-9.167-1.833-13.5-5.5S337 184 337 178c0-12.667 15.667-32.333 47-59\nH213l-171-1c-8.667-6-13-12.333-13-19 0-4.667 4.333-11.333 13-20h359\nc-16-25.333-24-45-24-59z",
+  // widehat1 is a modified version of a glyph from the MnSymbol package
+  widehat1: "M529 0h5l519 115c5 1 9 5 9 10 0 1-1 2-1 3l-4 22\nc-1 5-5 9-11 9h-2L532 67 19 159h-2c-5 0-9-4-11-9l-5-22c-1-6 2-12 8-13z",
+  // ditto widehat2, widehat3, & widehat4
+  widehat2: "M1181 0h2l1171 176c6 0 10 5 10 11l-2 23c-1 6-5 10\n-11 10h-1L1182 67 15 220h-1c-6 0-10-4-11-10l-2-23c-1-6 4-11 10-11z",
+  widehat3: "M1181 0h2l1171 236c6 0 10 5 10 11l-2 23c-1 6-5 10\n-11 10h-1L1182 67 15 280h-1c-6 0-10-4-11-10l-2-23c-1-6 4-11 10-11z",
+  widehat4: "M1181 0h2l1171 296c6 0 10 5 10 11l-2 23c-1 6-5 10\n-11 10h-1L1182 67 15 340h-1c-6 0-10-4-11-10l-2-23c-1-6 4-11 10-11z",
+  // widecheck paths are all inverted versions of widehat
+  widecheck1: "M529,159h5l519,-115c5,-1,9,-5,9,-10c0,-1,-1,-2,-1,-3l-4,-22c-1,\n-5,-5,-9,-11,-9h-2l-512,92l-513,-92h-2c-5,0,-9,4,-11,9l-5,22c-1,6,2,12,8,13z",
+  widecheck2: "M1181,220h2l1171,-176c6,0,10,-5,10,-11l-2,-23c-1,-6,-5,-10,\n-11,-10h-1l-1168,153l-1167,-153h-1c-6,0,-10,4,-11,10l-2,23c-1,6,4,11,10,11z",
+  widecheck3: "M1181,280h2l1171,-236c6,0,10,-5,10,-11l-2,-23c-1,-6,-5,-10,\n-11,-10h-1l-1168,213l-1167,-213h-1c-6,0,-10,4,-11,10l-2,23c-1,6,4,11,10,11z",
+  widecheck4: "M1181,340h2l1171,-296c6,0,10,-5,10,-11l-2,-23c-1,-6,-5,-10,\n-11,-10h-1l-1168,273l-1167,-273h-1c-6,0,-10,4,-11,10l-2,23c-1,6,4,11,10,11z",
+  // The next ten paths support reaction arrows from the mhchem package.
+  // Arrows for \ce{<-->} are offset from xAxis by 0.22ex, per mhchem in LaTeX
+  // baraboveleftarrow is mostly from glyph U+2190 in font KaTeX Main
+  baraboveleftarrow: "M400000 620h-399890l3 -3c68.7 -52.7 113.7 -120 135 -202\nc4 -14.7 6 -23 6 -25c0 -7.3 -7 -11 -21 -11c-8 0 -13.2 0.8 -15.5 2.5\nc-2.3 1.7 -4.2 5.8 -5.5 12.5c-1.3 4.7 -2.7 10.3 -4 17c-12 48.7 -34.8 92 -68.5 130\ns-74.2 66.3 -121.5 85c-10 4 -16 7.7 -18 11c0 8.7 6 14.3 18 17c47.3 18.7 87.8 47\n121.5 85s56.5 81.3 68.5 130c0.7 2 1.3 5 2 9s1.2 6.7 1.5 8c0.3 1.3 1 3.3 2 6\ns2.2 4.5 3.5 5.5c1.3 1 3.3 1.8 6 2.5s6 1 10 1c14 0 21 -3.7 21 -11\nc0 -2 -2 -10.3 -6 -25c-20 -79.3 -65 -146.7 -135 -202l-3 -3h399890z\nM100 620v40h399900v-40z M0 241v40h399900v-40zM0 241v40h399900v-40z",
+  // rightarrowabovebar is mostly from glyph U+2192, KaTeX Main
+  rightarrowabovebar: "M0 241v40h399891c-47.3 35.3-84 78-110 128-16.7 32\n-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0\n13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39\n-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85-40.5\n-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5\n-12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67\n151.7 139 205zm96 379h399894v40H0zm0 0h399904v40H0z",
+  // The short left harpoon has 0.5em (i.e. 500 units) kern on the left end.
+  // Ref from mhchem.sty: \rlap{\raisebox{-.22ex}{$\kern0.5em
+  baraboveshortleftharpoon: "M507,435c-4,4,-6.3,8.7,-7,14c0,5.3,0.7,9,2,11\nc1.3,2,5.3,5.3,12,10c90.7,54,156,130,196,228c3.3,10.7,6.3,16.3,9,17\nc2,0.7,5,1,9,1c0,0,5,0,5,0c10.7,0,16.7,-2,18,-6c2,-2.7,1,-9.7,-3,-21\nc-32,-87.3,-82.7,-157.7,-152,-211c0,0,-3,-3,-3,-3l399351,0l0,-40\nc-398570,0,-399437,0,-399437,0z M593 435 v40 H399500 v-40z\nM0 281 v-40 H399908 v40z M0 281 v-40 H399908 v40z",
+  rightharpoonaboveshortbar: "M0,241 l0,40c399126,0,399993,0,399993,0\nc4.7,-4.7,7,-9.3,7,-14c0,-9.3,-3.7,-15.3,-11,-18c-92.7,-56.7,-159,-133.7,-199,\n-231c-3.3,-9.3,-6,-14.7,-8,-16c-2,-1.3,-7,-2,-15,-2c-10.7,0,-16.7,2,-18,6\nc-2,2.7,-1,9.7,3,21c15.3,42,36.7,81.8,64,119.5c27.3,37.7,58,69.2,92,94.5z\nM0 241 v40 H399908 v-40z M0 475 v-40 H399500 v40z M0 475 v-40 H399500 v40z",
+  shortbaraboveleftharpoon: "M7,435c-4,4,-6.3,8.7,-7,14c0,5.3,0.7,9,2,11\nc1.3,2,5.3,5.3,12,10c90.7,54,156,130,196,228c3.3,10.7,6.3,16.3,9,17c2,0.7,5,1,9,\n1c0,0,5,0,5,0c10.7,0,16.7,-2,18,-6c2,-2.7,1,-9.7,-3,-21c-32,-87.3,-82.7,-157.7,\n-152,-211c0,0,-3,-3,-3,-3l399907,0l0,-40c-399126,0,-399993,0,-399993,0z\nM93 435 v40 H400000 v-40z M500 241 v40 H400000 v-40z M500 241 v40 H400000 v-40z",
+  shortrightharpoonabovebar: "M53,241l0,40c398570,0,399437,0,399437,0\nc4.7,-4.7,7,-9.3,7,-14c0,-9.3,-3.7,-15.3,-11,-18c-92.7,-56.7,-159,-133.7,-199,\n-231c-3.3,-9.3,-6,-14.7,-8,-16c-2,-1.3,-7,-2,-15,-2c-10.7,0,-16.7,2,-18,6\nc-2,2.7,-1,9.7,3,21c15.3,42,36.7,81.8,64,119.5c27.3,37.7,58,69.2,92,94.5z\nM500 241 v40 H399408 v-40z M500 435 v40 H400000 v-40z"
+};
+var tallDelim = function tallDelim(label, midHeight) {
+  switch (label) {
+    case "lbrack":
+      return "M403 1759 V84 H666 V0 H319 V1759 v" + midHeight + " v1759 h347 v-84\nH403z M403 1759 V0 H319 V1759 v" + midHeight + " v1759 h84z";
+
+    case "rbrack":
+      return "M347 1759 V0 H0 V84 H263 V1759 v" + midHeight + " v1759 H0 v84 H347z\nM347 1759 V0 H263 V1759 v" + midHeight + " v1759 h84z";
+
+    case "vert":
+      return "M145 15 v585 v" + midHeight + " v585 c2.667,10,9.667,15,21,15\nc10,0,16.667,-5,20,-15 v-585 v" + -midHeight + " v-585 c-2.667,-10,-9.667,-15,-21,-15\nc-10,0,-16.667,5,-20,15z M188 15 H145 v585 v" + midHeight + " v585 h43z";
+
+    case "doublevert":
+      return "M145 15 v585 v" + midHeight + " v585 c2.667,10,9.667,15,21,15\nc10,0,16.667,-5,20,-15 v-585 v" + -midHeight + " v-585 c-2.667,-10,-9.667,-15,-21,-15\nc-10,0,-16.667,5,-20,15z M188 15 H145 v585 v" + midHeight + " v585 h43z\nM367 15 v585 v" + midHeight + " v585 c2.667,10,9.667,15,21,15\nc10,0,16.667,-5,20,-15 v-585 v" + -midHeight + " v-585 c-2.667,-10,-9.667,-15,-21,-15\nc-10,0,-16.667,5,-20,15z M410 15 H367 v585 v" + midHeight + " v585 h43z";
+
+    case "lfloor":
+      return "M319 602 V0 H403 V602 v" + midHeight + " v1715 h263 v84 H319z\nMM319 602 V0 H403 V602 v" + midHeight + " v1715 H319z";
+
+    case "rfloor":
+      return "M319 602 V0 H403 V602 v" + midHeight + " v1799 H0 v-84 H319z\nMM319 602 V0 H403 V602 v" + midHeight + " v1715 H319z";
+
+    case "lceil":
+      return "M403 1759 V84 H666 V0 H319 V1759 v" + midHeight + " v602 h84z\nM403 1759 V0 H319 V1759 v" + midHeight + " v602 h84z";
+
+    case "rceil":
+      return "M347 1759 V0 H0 V84 H263 V1759 v" + midHeight + " v602 h84z\nM347 1759 V0 h-84 V1759 v" + midHeight + " v602 h84z";
+
+    case "lparen":
+      return "M863,9c0,-2,-2,-5,-6,-9c0,0,-17,0,-17,0c-12.7,0,-19.3,0.3,-20,1\nc-5.3,5.3,-10.3,11,-15,17c-242.7,294.7,-395.3,682,-458,1162c-21.3,163.3,-33.3,349,\n-36,557 l0," + (midHeight + 84) + "c0.2,6,0,26,0,60c2,159.3,10,310.7,24,454c53.3,528,210,\n949.7,470,1265c4.7,6,9.7,11.7,15,17c0.7,0.7,7,1,19,1c0,0,18,0,18,0c4,-4,6,-7,6,-9\nc0,-2.7,-3.3,-8.7,-10,-18c-135.3,-192.7,-235.5,-414.3,-300.5,-665c-65,-250.7,-102.5,\n-544.7,-112.5,-882c-2,-104,-3,-167,-3,-189\nl0,-" + (midHeight + 92) + "c0,-162.7,5.7,-314,17,-454c20.7,-272,63.7,-513,129,-723c65.3,\n-210,155.3,-396.3,270,-559c6.7,-9.3,10,-15.3,10,-18z";
+
+    case "rparen":
+      return "M76,0c-16.7,0,-25,3,-25,9c0,2,2,6.3,6,13c21.3,28.7,42.3,60.3,\n63,95c96.7,156.7,172.8,332.5,228.5,527.5c55.7,195,92.8,416.5,111.5,664.5\nc11.3,139.3,17,290.7,17,454c0,28,1.7,43,3.3,45l0," + (midHeight + 9) + "\nc-3,4,-3.3,16.7,-3.3,38c0,162,-5.7,313.7,-17,455c-18.7,248,-55.8,469.3,-111.5,664\nc-55.7,194.7,-131.8,370.3,-228.5,527c-20.7,34.7,-41.7,66.3,-63,95c-2,3.3,-4,7,-6,11\nc0,7.3,5.7,11,17,11c0,0,11,0,11,0c9.3,0,14.3,-0.3,15,-1c5.3,-5.3,10.3,-11,15,-17\nc242.7,-294.7,395.3,-681.7,458,-1161c21.3,-164.7,33.3,-350.7,36,-558\nl0,-" + (midHeight + 144) + "c-2,-159.3,-10,-310.7,-24,-454c-53.3,-528,-210,-949.7,\n-470,-1265c-4.7,-6,-9.7,-11.7,-15,-17c-0.7,-0.7,-6.7,-1,-18,-1z";
+
+    default:
+      // We should not ever get here.
+      throw new Error("Unknown stretchy delimiter.");
+  }
+};
+;// CONCATENATED MODULE: ./src/tree.js
+
+
+/**
+ * This node represents a document fragment, which contains elements, but when
+ * placed into the DOM doesn't have any representation itself. It only contains
+ * children and doesn't have any DOM node properties.
+ */
+var DocumentFragment = /*#__PURE__*/function () {
+  // HtmlDomNode
+  // Never used; needed for satisfying interface.
+  function DocumentFragment(children) {
+    this.children = void 0;
+    this.classes = void 0;
+    this.height = void 0;
+    this.depth = void 0;
+    this.maxFontSize = void 0;
+    this.style = void 0;
+    this.children = children;
+    this.classes = [];
+    this.height = 0;
+    this.depth = 0;
+    this.maxFontSize = 0;
+    this.style = {};
+  }
+
+  var _proto = DocumentFragment.prototype;
+
+  _proto.hasClass = function hasClass(className) {
+    return utils.contains(this.classes, className);
+  }
+  /** Convert the fragment into a node. */
+  ;
+
+  _proto.toNode = function toNode() {
+    var frag = document.createDocumentFragment();
+
+    for (var i = 0; i < this.children.length; i++) {
+      frag.appendChild(this.children[i].toNode());
+    }
+
+    return frag;
+  }
+  /** Convert the fragment into HTML markup. */
+  ;
+
+  _proto.toMarkup = function toMarkup() {
+    var markup = ""; // Simply concatenate the markup for the children together.
+
+    for (var i = 0; i < this.children.length; i++) {
+      markup += this.children[i].toMarkup();
+    }
+
+    return markup;
+  }
+  /**
+   * Converts the math node into a string, similar to innerText. Applies to
+   * MathDomNode's only.
+   */
+  ;
+
+  _proto.toText = function toText() {
+    // To avoid this, we would subclass documentFragment separately for
+    // MathML, but polyfills for subclassing is expensive per PR 1469.
+    // $FlowFixMe: Only works for ChildType = MathDomNode.
+    var toText = function toText(child) {
+      return child.toText();
+    };
+
+    return this.children.map(toText).join("");
+  };
+
+  return DocumentFragment;
+}();
+;// CONCATENATED MODULE: ./src/fontMetricsData.js
+// This file is GENERATED by buildMetrics.sh. DO NOT MODIFY.
+/* harmony default export */ var fontMetricsData = ({
+  "AMS-Regular": {
+    "32": [0, 0, 0, 0, 0.25],
+    "65": [0, 0.68889, 0, 0, 0.72222],
+    "66": [0, 0.68889, 0, 0, 0.66667],
+    "67": [0, 0.68889, 0, 0, 0.72222],
+    "68": [0, 0.68889, 0, 0, 0.72222],
+    "69": [0, 0.68889, 0, 0, 0.66667],
+    "70": [0, 0.68889, 0, 0, 0.61111],
+    "71": [0, 0.68889, 0, 0, 0.77778],
+    "72": [0, 0.68889, 0, 0, 0.77778],
+    "73": [0, 0.68889, 0, 0, 0.38889],
+    "74": [0.16667, 0.68889, 0, 0, 0.5],
+    "75": [0, 0.68889, 0, 0, 0.77778],
+    "76": [0, 0.68889, 0, 0, 0.66667],
+    "77": [0, 0.68889, 0, 0, 0.94445],
+    "78": [0, 0.68889, 0, 0, 0.72222],
+    "79": [0.16667, 0.68889, 0, 0, 0.77778],
+    "80": [0, 0.68889, 0, 0, 0.61111],
+    "81": [0.16667, 0.68889, 0, 0, 0.77778],
+    "82": [0, 0.68889, 0, 0, 0.72222],
+    "83": [0, 0.68889, 0, 0, 0.55556],
+    "84": [0, 0.68889, 0, 0, 0.66667],
+    "85": [0, 0.68889, 0, 0, 0.72222],
+    "86": [0, 0.68889, 0, 0, 0.72222],
+    "87": [0, 0.68889, 0, 0, 1.0],
+    "88": [0, 0.68889, 0, 0, 0.72222],
+    "89": [0, 0.68889, 0, 0, 0.72222],
+    "90": [0, 0.68889, 0, 0, 0.66667],
+    "107": [0, 0.68889, 0, 0, 0.55556],
+    "160": [0, 0, 0, 0, 0.25],
+    "165": [0, 0.675, 0.025, 0, 0.75],
+    "174": [0.15559, 0.69224, 0, 0, 0.94666],
+    "240": [0, 0.68889, 0, 0, 0.55556],
+    "295": [0, 0.68889, 0, 0, 0.54028],
+    "710": [0, 0.825, 0, 0, 2.33334],
+    "732": [0, 0.9, 0, 0, 2.33334],
+    "770": [0, 0.825, 0, 0, 2.33334],
+    "771": [0, 0.9, 0, 0, 2.33334],
+    "989": [0.08167, 0.58167, 0, 0, 0.77778],
+    "1008": [0, 0.43056, 0.04028, 0, 0.66667],
+    "8245": [0, 0.54986, 0, 0, 0.275],
+    "8463": [0, 0.68889, 0, 0, 0.54028],
+    "8487": [0, 0.68889, 0, 0, 0.72222],
+    "8498": [0, 0.68889, 0, 0, 0.55556],
+    "8502": [0, 0.68889, 0, 0, 0.66667],
+    "8503": [0, 0.68889, 0, 0, 0.44445],
+    "8504": [0, 0.68889, 0, 0, 0.66667],
+    "8513": [0, 0.68889, 0, 0, 0.63889],
+    "8592": [-0.03598, 0.46402, 0, 0, 0.5],
+    "8594": [-0.03598, 0.46402, 0, 0, 0.5],
+    "8602": [-0.13313, 0.36687, 0, 0, 1.0],
+    "8603": [-0.13313, 0.36687, 0, 0, 1.0],
+    "8606": [0.01354, 0.52239, 0, 0, 1.0],
+    "8608": [0.01354, 0.52239, 0, 0, 1.0],
+    "8610": [0.01354, 0.52239, 0, 0, 1.11111],
+    "8611": [0.01354, 0.52239, 0, 0, 1.11111],
+    "8619": [0, 0.54986, 0, 0, 1.0],
+    "8620": [0, 0.54986, 0, 0, 1.0],
+    "8621": [-0.13313, 0.37788, 0, 0, 1.38889],
+    "8622": [-0.13313, 0.36687, 0, 0, 1.0],
+    "8624": [0, 0.69224, 0, 0, 0.5],
+    "8625": [0, 0.69224, 0, 0, 0.5],
+    "8630": [0, 0.43056, 0, 0, 1.0],
+    "8631": [0, 0.43056, 0, 0, 1.0],
+    "8634": [0.08198, 0.58198, 0, 0, 0.77778],
+    "8635": [0.08198, 0.58198, 0, 0, 0.77778],
+    "8638": [0.19444, 0.69224, 0, 0, 0.41667],
+    "8639": [0.19444, 0.69224, 0, 0, 0.41667],
+    "8642": [0.19444, 0.69224, 0, 0, 0.41667],
+    "8643": [0.19444, 0.69224, 0, 0, 0.41667],
+    "8644": [0.1808, 0.675, 0, 0, 1.0],
+    "8646": [0.1808, 0.675, 0, 0, 1.0],
+    "8647": [0.1808, 0.675, 0, 0, 1.0],
+    "8648": [0.19444, 0.69224, 0, 0, 0.83334],
+    "8649": [0.1808, 0.675, 0, 0, 1.0],
+    "8650": [0.19444, 0.69224, 0, 0, 0.83334],
+    "8651": [0.01354, 0.52239, 0, 0, 1.0],
+    "8652": [0.01354, 0.52239, 0, 0, 1.0],
+    "8653": [-0.13313, 0.36687, 0, 0, 1.0],
+    "8654": [-0.13313, 0.36687, 0, 0, 1.0],
+    "8655": [-0.13313, 0.36687, 0, 0, 1.0],
+    "8666": [0.13667, 0.63667, 0, 0, 1.0],
+    "8667": [0.13667, 0.63667, 0, 0, 1.0],
+    "8669": [-0.13313, 0.37788, 0, 0, 1.0],
+    "8672": [-0.064, 0.437, 0, 0, 1.334],
+    "8674": [-0.064, 0.437, 0, 0, 1.334],
+    "8705": [0, 0.825, 0, 0, 0.5],
+    "8708": [0, 0.68889, 0, 0, 0.55556],
+    "8709": [0.08167, 0.58167, 0, 0, 0.77778],
+    "8717": [0, 0.43056, 0, 0, 0.42917],
+    "8722": [-0.03598, 0.46402, 0, 0, 0.5],
+    "8724": [0.08198, 0.69224, 0, 0, 0.77778],
+    "8726": [0.08167, 0.58167, 0, 0, 0.77778],
+    "8733": [0, 0.69224, 0, 0, 0.77778],
+    "8736": [0, 0.69224, 0, 0, 0.72222],
+    "8737": [0, 0.69224, 0, 0, 0.72222],
+    "8738": [0.03517, 0.52239, 0, 0, 0.72222],
+    "8739": [0.08167, 0.58167, 0, 0, 0.22222],
+    "8740": [0.25142, 0.74111, 0, 0, 0.27778],
+    "8741": [0.08167, 0.58167, 0, 0, 0.38889],
+    "8742": [0.25142, 0.74111, 0, 0, 0.5],
+    "8756": [0, 0.69224, 0, 0, 0.66667],
+    "8757": [0, 0.69224, 0, 0, 0.66667],
+    "8764": [-0.13313, 0.36687, 0, 0, 0.77778],
+    "8765": [-0.13313, 0.37788, 0, 0, 0.77778],
+    "8769": [-0.13313, 0.36687, 0, 0, 0.77778],
+    "8770": [-0.03625, 0.46375, 0, 0, 0.77778],
+    "8774": [0.30274, 0.79383, 0, 0, 0.77778],
+    "8776": [-0.01688, 0.48312, 0, 0, 0.77778],
+    "8778": [0.08167, 0.58167, 0, 0, 0.77778],
+    "8782": [0.06062, 0.54986, 0, 0, 0.77778],
+    "8783": [0.06062, 0.54986, 0, 0, 0.77778],
+    "8785": [0.08198, 0.58198, 0, 0, 0.77778],
+    "8786": [0.08198, 0.58198, 0, 0, 0.77778],
+    "8787": [0.08198, 0.58198, 0, 0, 0.77778],
+    "8790": [0, 0.69224, 0, 0, 0.77778],
+    "8791": [0.22958, 0.72958, 0, 0, 0.77778],
+    "8796": [0.08198, 0.91667, 0, 0, 0.77778],
+    "8806": [0.25583, 0.75583, 0, 0, 0.77778],
+    "8807": [0.25583, 0.75583, 0, 0, 0.77778],
+    "8808": [0.25142, 0.75726, 0, 0, 0.77778],
+    "8809": [0.25142, 0.75726, 0, 0, 0.77778],
+    "8812": [0.25583, 0.75583, 0, 0, 0.5],
+    "8814": [0.20576, 0.70576, 0, 0, 0.77778],
+    "8815": [0.20576, 0.70576, 0, 0, 0.77778],
+    "8816": [0.30274, 0.79383, 0, 0, 0.77778],
+    "8817": [0.30274, 0.79383, 0, 0, 0.77778],
+    "8818": [0.22958, 0.72958, 0, 0, 0.77778],
+    "8819": [0.22958, 0.72958, 0, 0, 0.77778],
+    "8822": [0.1808, 0.675, 0, 0, 0.77778],
+    "8823": [0.1808, 0.675, 0, 0, 0.77778],
+    "8828": [0.13667, 0.63667, 0, 0, 0.77778],
+    "8829": [0.13667, 0.63667, 0, 0, 0.77778],
+    "8830": [0.22958, 0.72958, 0, 0, 0.77778],
+    "8831": [0.22958, 0.72958, 0, 0, 0.77778],
+    "8832": [0.20576, 0.70576, 0, 0, 0.77778],
+    "8833": [0.20576, 0.70576, 0, 0, 0.77778],
+    "8840": [0.30274, 0.79383, 0, 0, 0.77778],
+    "8841": [0.30274, 0.79383, 0, 0, 0.77778],
+    "8842": [0.13597, 0.63597, 0, 0, 0.77778],
+    "8843": [0.13597, 0.63597, 0, 0, 0.77778],
+    "8847": [0.03517, 0.54986, 0, 0, 0.77778],
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+    "123": [0.08333, 0.69444, 0, 0, 0.525],
+    "124": [0.08333, 0.69444, 0, 0, 0.525],
+    "125": [0.08333, 0.69444, 0, 0, 0.525],
+    "126": [0, 0.61111, 0, 0, 0.525],
+    "127": [0, 0.61111, 0, 0, 0.525],
+    "160": [0, 0, 0, 0, 0.525],
+    "176": [0, 0.61111, 0, 0, 0.525],
+    "184": [0.19445, 0, 0, 0, 0.525],
+    "305": [0, 0.43056, 0, 0, 0.525],
+    "567": [0.22222, 0.43056, 0, 0, 0.525],
+    "711": [0, 0.56597, 0, 0, 0.525],
+    "713": [0, 0.56555, 0, 0, 0.525],
+    "714": [0, 0.61111, 0, 0, 0.525],
+    "715": [0, 0.61111, 0, 0, 0.525],
+    "728": [0, 0.61111, 0, 0, 0.525],
+    "730": [0, 0.61111, 0, 0, 0.525],
+    "770": [0, 0.61111, 0, 0, 0.525],
+    "771": [0, 0.61111, 0, 0, 0.525],
+    "776": [0, 0.61111, 0, 0, 0.525],
+    "915": [0, 0.61111, 0, 0, 0.525],
+    "916": [0, 0.61111, 0, 0, 0.525],
+    "920": [0, 0.61111, 0, 0, 0.525],
+    "923": [0, 0.61111, 0, 0, 0.525],
+    "926": [0, 0.61111, 0, 0, 0.525],
+    "928": [0, 0.61111, 0, 0, 0.525],
+    "931": [0, 0.61111, 0, 0, 0.525],
+    "933": [0, 0.61111, 0, 0, 0.525],
+    "934": [0, 0.61111, 0, 0, 0.525],
+    "936": [0, 0.61111, 0, 0, 0.525],
+    "937": [0, 0.61111, 0, 0, 0.525],
+    "8216": [0, 0.61111, 0, 0, 0.525],
+    "8217": [0, 0.61111, 0, 0, 0.525],
+    "8242": [0, 0.61111, 0, 0, 0.525],
+    "9251": [0.11111, 0.21944, 0, 0, 0.525]
+  }
+});
+;// CONCATENATED MODULE: ./src/fontMetrics.js
+
+
+/**
+ * This file contains metrics regarding fonts and individual symbols. The sigma
+ * and xi variables, as well as the metricMap map contain data extracted from
+ * TeX, TeX font metrics, and the TTF files. These data are then exposed via the
+ * `metrics` variable and the getCharacterMetrics function.
+ */
+// In TeX, there are actually three sets of dimensions, one for each of
+// textstyle (size index 5 and higher: >=9pt), scriptstyle (size index 3 and 4:
+// 7-8pt), and scriptscriptstyle (size index 1 and 2: 5-6pt).  These are
+// provided in the arrays below, in that order.
+//
+// The font metrics are stored in fonts cmsy10, cmsy7, and cmsy5 respectively.
+// This was determined by running the following script:
+//
+//     latex -interaction=nonstopmode \
+//     '\documentclass{article}\usepackage{amsmath}\begin{document}' \
+//     '$a$ \expandafter\show\the\textfont2' \
+//     '\expandafter\show\the\scriptfont2' \
+//     '\expandafter\show\the\scriptscriptfont2' \
+//     '\stop'
+//
+// The metrics themselves were retrieved using the following commands:
+//
+//     tftopl cmsy10
+//     tftopl cmsy7
+//     tftopl cmsy5
+//
+// The output of each of these commands is quite lengthy.  The only part we
+// care about is the FONTDIMEN section. Each value is measured in EMs.
+var sigmasAndXis = {
+  slant: [0.250, 0.250, 0.250],
+  // sigma1
+  space: [0.000, 0.000, 0.000],
+  // sigma2
+  stretch: [0.000, 0.000, 0.000],
+  // sigma3
+  shrink: [0.000, 0.000, 0.000],
+  // sigma4
+  xHeight: [0.431, 0.431, 0.431],
+  // sigma5
+  quad: [1.000, 1.171, 1.472],
+  // sigma6
+  extraSpace: [0.000, 0.000, 0.000],
+  // sigma7
+  num1: [0.677, 0.732, 0.925],
+  // sigma8
+  num2: [0.394, 0.384, 0.387],
+  // sigma9
+  num3: [0.444, 0.471, 0.504],
+  // sigma10
+  denom1: [0.686, 0.752, 1.025],
+  // sigma11
+  denom2: [0.345, 0.344, 0.532],
+  // sigma12
+  sup1: [0.413, 0.503, 0.504],
+  // sigma13
+  sup2: [0.363, 0.431, 0.404],
+  // sigma14
+  sup3: [0.289, 0.286, 0.294],
+  // sigma15
+  sub1: [0.150, 0.143, 0.200],
+  // sigma16
+  sub2: [0.247, 0.286, 0.400],
+  // sigma17
+  supDrop: [0.386, 0.353, 0.494],
+  // sigma18
+  subDrop: [0.050, 0.071, 0.100],
+  // sigma19
+  delim1: [2.390, 1.700, 1.980],
+  // sigma20
+  delim2: [1.010, 1.157, 1.420],
+  // sigma21
+  axisHeight: [0.250, 0.250, 0.250],
+  // sigma22
+  // These font metrics are extracted from TeX by using tftopl on cmex10.tfm;
+  // they correspond to the font parameters of the extension fonts (family 3).
+  // See the TeXbook, page 441. In AMSTeX, the extension fonts scale; to
+  // match cmex7, we'd use cmex7.tfm values for script and scriptscript
+  // values.
+  defaultRuleThickness: [0.04, 0.049, 0.049],
+  // xi8; cmex7: 0.049
+  bigOpSpacing1: [0.111, 0.111, 0.111],
+  // xi9
+  bigOpSpacing2: [0.166, 0.166, 0.166],
+  // xi10
+  bigOpSpacing3: [0.2, 0.2, 0.2],
+  // xi11
+  bigOpSpacing4: [0.6, 0.611, 0.611],
+  // xi12; cmex7: 0.611
+  bigOpSpacing5: [0.1, 0.143, 0.143],
+  // xi13; cmex7: 0.143
+  // The \sqrt rule width is taken from the height of the surd character.
+  // Since we use the same font at all sizes, this thickness doesn't scale.
+  sqrtRuleThickness: [0.04, 0.04, 0.04],
+  // This value determines how large a pt is, for metrics which are defined
+  // in terms of pts.
+  // This value is also used in katex.less; if you change it make sure the
+  // values match.
+  ptPerEm: [10.0, 10.0, 10.0],
+  // The space between adjacent `|` columns in an array definition. From
+  // `\showthe\doublerulesep` in LaTeX. Equals 2.0 / ptPerEm.
+  doubleRuleSep: [0.2, 0.2, 0.2],
+  // The width of separator lines in {array} environments. From
+  // `\showthe\arrayrulewidth` in LaTeX. Equals 0.4 / ptPerEm.
+  arrayRuleWidth: [0.04, 0.04, 0.04],
+  // Two values from LaTeX source2e:
+  fboxsep: [0.3, 0.3, 0.3],
+  //        3 pt / ptPerEm
+  fboxrule: [0.04, 0.04, 0.04] // 0.4 pt / ptPerEm
+
+}; // This map contains a mapping from font name and character code to character
+// metrics, including height, depth, italic correction, and skew (kern from the
+// character to the corresponding \skewchar)
+// This map is generated via `make metrics`. It should not be changed manually.
+
+ // These are very rough approximations.  We default to Times New Roman which
+// should have Latin-1 and Cyrillic characters, but may not depending on the
+// operating system.  The metrics do not account for extra height from the
+// accents.  In the case of Cyrillic characters which have both ascenders and
+// descenders we prefer approximations with ascenders, primarily to prevent
+// the fraction bar or root line from intersecting the glyph.
+// TODO(kevinb) allow union of multiple glyph metrics for better accuracy.
+
+var extraCharacterMap = {
+  // Latin-1
+  'Å': 'A',
+  'Ð': 'D',
+  'Þ': 'o',
+  'å': 'a',
+  'ð': 'd',
+  'þ': 'o',
+  // Cyrillic
+  'А': 'A',
+  'Б': 'B',
+  'В': 'B',
+  'Г': 'F',
+  'Д': 'A',
+  'Е': 'E',
+  'Ж': 'K',
+  'З': '3',
+  'И': 'N',
+  'Й': 'N',
+  'К': 'K',
+  'Л': 'N',
+  'М': 'M',
+  'Н': 'H',
+  'О': 'O',
+  'П': 'N',
+  'Р': 'P',
+  'С': 'C',
+  'Т': 'T',
+  'У': 'y',
+  'Ф': 'O',
+  'Х': 'X',
+  'Ц': 'U',
+  'Ч': 'h',
+  'Ш': 'W',
+  'Щ': 'W',
+  'Ъ': 'B',
+  'Ы': 'X',
+  'Ь': 'B',
+  'Э': '3',
+  'Ю': 'X',
+  'Я': 'R',
+  'а': 'a',
+  'б': 'b',
+  'в': 'a',
+  'г': 'r',
+  'д': 'y',
+  'е': 'e',
+  'ж': 'm',
+  'з': 'e',
+  'и': 'n',
+  'й': 'n',
+  'к': 'n',
+  'л': 'n',
+  'м': 'm',
+  'н': 'n',
+  'о': 'o',
+  'п': 'n',
+  'р': 'p',
+  'с': 'c',
+  'т': 'o',
+  'у': 'y',
+  'ф': 'b',
+  'х': 'x',
+  'ц': 'n',
+  'ч': 'n',
+  'ш': 'w',
+  'щ': 'w',
+  'ъ': 'a',
+  'ы': 'm',
+  'ь': 'a',
+  'э': 'e',
+  'ю': 'm',
+  'я': 'r'
+};
+
+/**
+ * This function adds new font metrics to default metricMap
+ * It can also override existing metrics
+ */
+function setFontMetrics(fontName, metrics) {
+  fontMetricsData[fontName] = metrics;
+}
+/**
+ * This function is a convenience function for looking up information in the
+ * metricMap table. It takes a character as a string, and a font.
+ *
+ * Note: the `width` property may be undefined if fontMetricsData.js wasn't
+ * built using `Make extended_metrics`.
+ */
+
+function getCharacterMetrics(character, font, mode) {
+  if (!fontMetricsData[font]) {
+    throw new Error("Font metrics not found for font: " + font + ".");
+  }
+
+  var ch = character.charCodeAt(0);
+  var metrics = fontMetricsData[font][ch];
+
+  if (!metrics && character[0] in extraCharacterMap) {
+    ch = extraCharacterMap[character[0]].charCodeAt(0);
+    metrics = fontMetricsData[font][ch];
+  }
+
+  if (!metrics && mode === 'text') {
+    // We don't typically have font metrics for Asian scripts.
+    // But since we support them in text mode, we need to return
+    // some sort of metrics.
+    // So if the character is in a script we support but we
+    // don't have metrics for it, just use the metrics for
+    // the Latin capital letter M. This is close enough because
+    // we (currently) only care about the height of the glyph
+    // not its width.
+    if (supportedCodepoint(ch)) {
+      metrics = fontMetricsData[font][77]; // 77 is the charcode for 'M'
+    }
+  }
+
+  if (metrics) {
+    return {
+      depth: metrics[0],
+      height: metrics[1],
+      italic: metrics[2],
+      skew: metrics[3],
+      width: metrics[4]
+    };
+  }
+}
+var fontMetricsBySizeIndex = {};
+/**
+ * Get the font metrics for a given size.
+ */
+
+function getGlobalMetrics(size) {
+  var sizeIndex;
+
+  if (size >= 5) {
+    sizeIndex = 0;
+  } else if (size >= 3) {
+    sizeIndex = 1;
+  } else {
+    sizeIndex = 2;
+  }
+
+  if (!fontMetricsBySizeIndex[sizeIndex]) {
+    var metrics = fontMetricsBySizeIndex[sizeIndex] = {
+      cssEmPerMu: sigmasAndXis.quad[sizeIndex] / 18
+    };
+
+    for (var key in sigmasAndXis) {
+      if (sigmasAndXis.hasOwnProperty(key)) {
+        metrics[key] = sigmasAndXis[key][sizeIndex];
+      }
+    }
+  }
+
+  return fontMetricsBySizeIndex[sizeIndex];
+}
+;// CONCATENATED MODULE: ./src/Options.js
+/**
+ * This file contains information about the options that the Parser carries
+ * around with it while parsing. Data is held in an `Options` object, and when
+ * recursing, a new `Options` object can be created with the `.with*` and
+ * `.reset` functions.
+ */
+
+var sizeStyleMap = [// Each element contains [textsize, scriptsize, scriptscriptsize].
+// The size mappings are taken from TeX with \normalsize=10pt.
+[1, 1, 1], // size1: [5, 5, 5]              \tiny
+[2, 1, 1], // size2: [6, 5, 5]
+[3, 1, 1], // size3: [7, 5, 5]              \scriptsize
+[4, 2, 1], // size4: [8, 6, 5]              \footnotesize
+[5, 2, 1], // size5: [9, 6, 5]              \small
+[6, 3, 1], // size6: [10, 7, 5]             \normalsize
+[7, 4, 2], // size7: [12, 8, 6]             \large
+[8, 6, 3], // size8: [14.4, 10, 7]          \Large
+[9, 7, 6], // size9: [17.28, 12, 10]        \LARGE
+[10, 8, 7], // size10: [20.74, 14.4, 12]     \huge
+[11, 10, 9] // size11: [24.88, 20.74, 17.28] \HUGE
+];
+var sizeMultipliers = [// fontMetrics.js:getGlobalMetrics also uses size indexes, so if
+// you change size indexes, change that function.
+0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.2, 1.44, 1.728, 2.074, 2.488];
+
+var sizeAtStyle = function sizeAtStyle(size, style) {
+  return style.size < 2 ? size : sizeStyleMap[size - 1][style.size - 1];
+}; // In these types, "" (empty string) means "no change".
+
+
+/**
+ * This is the main options class. It contains the current style, size, color,
+ * and font.
+ *
+ * Options objects should not be modified. To create a new Options with
+ * different properties, call a `.having*` method.
+ */
+var Options = /*#__PURE__*/function () {
+  // A font family applies to a group of fonts (i.e. SansSerif), while a font
+  // represents a specific font (i.e. SansSerif Bold).
+  // See: https://tex.stackexchange.com/questions/22350/difference-between-textrm-and-mathrm
+
+  /**
+   * The base size index.
+   */
+  function Options(data) {
+    this.style = void 0;
+    this.color = void 0;
+    this.size = void 0;
+    this.textSize = void 0;
+    this.phantom = void 0;
+    this.font = void 0;
+    this.fontFamily = void 0;
+    this.fontWeight = void 0;
+    this.fontShape = void 0;
+    this.sizeMultiplier = void 0;
+    this.maxSize = void 0;
+    this.minRuleThickness = void 0;
+    this._fontMetrics = void 0;
+    this.style = data.style;
+    this.color = data.color;
+    this.size = data.size || Options.BASESIZE;
+    this.textSize = data.textSize || this.size;
+    this.phantom = !!data.phantom;
+    this.font = data.font || "";
+    this.fontFamily = data.fontFamily || "";
+    this.fontWeight = data.fontWeight || '';
+    this.fontShape = data.fontShape || '';
+    this.sizeMultiplier = sizeMultipliers[this.size - 1];
+    this.maxSize = data.maxSize;
+    this.minRuleThickness = data.minRuleThickness;
+    this._fontMetrics = undefined;
+  }
+  /**
+   * Returns a new options object with the same properties as "this".  Properties
+   * from "extension" will be copied to the new options object.
+   */
+
+
+  var _proto = Options.prototype;
+
+  _proto.extend = function extend(extension) {
+    var data = {
+      style: this.style,
+      size: this.size,
+      textSize: this.textSize,
+      color: this.color,
+      phantom: this.phantom,
+      font: this.font,
+      fontFamily: this.fontFamily,
+      fontWeight: this.fontWeight,
+      fontShape: this.fontShape,
+      maxSize: this.maxSize,
+      minRuleThickness: this.minRuleThickness
+    };
+
+    for (var key in extension) {
+      if (extension.hasOwnProperty(key)) {
+        data[key] = extension[key];
+      }
+    }
+
+    return new Options(data);
+  }
+  /**
+   * Return an options object with the given style. If `this.style === style`,
+   * returns `this`.
+   */
+  ;
+
+  _proto.havingStyle = function havingStyle(style) {
+    if (this.style === style) {
+      return this;
+    } else {
+      return this.extend({
+        style: style,
+        size: sizeAtStyle(this.textSize, style)
+      });
+    }
+  }
+  /**
+   * Return an options object with a cramped version of the current style. If
+   * the current style is cramped, returns `this`.
+   */
+  ;
+
+  _proto.havingCrampedStyle = function havingCrampedStyle() {
+    return this.havingStyle(this.style.cramp());
+  }
+  /**
+   * Return an options object with the given size and in at least `\textstyle`.
+   * Returns `this` if appropriate.
+   */
+  ;
+
+  _proto.havingSize = function havingSize(size) {
+    if (this.size === size && this.textSize === size) {
+      return this;
+    } else {
+      return this.extend({
+        style: this.style.text(),
+        size: size,
+        textSize: size,
+        sizeMultiplier: sizeMultipliers[size - 1]
+      });
+    }
+  }
+  /**
+   * Like `this.havingSize(BASESIZE).havingStyle(style)`. If `style` is omitted,
+   * changes to at least `\textstyle`.
+   */
+  ;
+
+  _proto.havingBaseStyle = function havingBaseStyle(style) {
+    style = style || this.style.text();
+    var wantSize = sizeAtStyle(Options.BASESIZE, style);
+
+    if (this.size === wantSize && this.textSize === Options.BASESIZE && this.style === style) {
+      return this;
+    } else {
+      return this.extend({
+        style: style,
+        size: wantSize
+      });
+    }
+  }
+  /**
+   * Remove the effect of sizing changes such as \Huge.
+   * Keep the effect of the current style, such as \scriptstyle.
+   */
+  ;
+
+  _proto.havingBaseSizing = function havingBaseSizing() {
+    var size;
+
+    switch (this.style.id) {
+      case 4:
+      case 5:
+        size = 3; // normalsize in scriptstyle
+
+        break;
+
+      case 6:
+      case 7:
+        size = 1; // normalsize in scriptscriptstyle
+
+        break;
+
+      default:
+        size = 6;
+      // normalsize in textstyle or displaystyle
+    }
+
+    return this.extend({
+      style: this.style.text(),
+      size: size
+    });
+  }
+  /**
+   * Create a new options object with the given color.
+   */
+  ;
+
+  _proto.withColor = function withColor(color) {
+    return this.extend({
+      color: color
+    });
+  }
+  /**
+   * Create a new options object with "phantom" set to true.
+   */
+  ;
+
+  _proto.withPhantom = function withPhantom() {
+    return this.extend({
+      phantom: true
+    });
+  }
+  /**
+   * Creates a new options object with the given math font or old text font.
+   * @type {[type]}
+   */
+  ;
+
+  _proto.withFont = function withFont(font) {
+    return this.extend({
+      font: font
+    });
+  }
+  /**
+   * Create a new options objects with the given fontFamily.
+   */
+  ;
+
+  _proto.withTextFontFamily = function withTextFontFamily(fontFamily) {
+    return this.extend({
+      fontFamily: fontFamily,
+      font: ""
+    });
+  }
+  /**
+   * Creates a new options object with the given font weight
+   */
+  ;
+
+  _proto.withTextFontWeight = function withTextFontWeight(fontWeight) {
+    return this.extend({
+      fontWeight: fontWeight,
+      font: ""
+    });
+  }
+  /**
+   * Creates a new options object with the given font weight
+   */
+  ;
+
+  _proto.withTextFontShape = function withTextFontShape(fontShape) {
+    return this.extend({
+      fontShape: fontShape,
+      font: ""
+    });
+  }
+  /**
+   * Return the CSS sizing classes required to switch from enclosing options
+   * `oldOptions` to `this`. Returns an array of classes.
+   */
+  ;
+
+  _proto.sizingClasses = function sizingClasses(oldOptions) {
+    if (oldOptions.size !== this.size) {
+      return ["sizing", "reset-size" + oldOptions.size, "size" + this.size];
+    } else {
+      return [];
+    }
+  }
+  /**
+   * Return the CSS sizing classes required to switch to the base size. Like
+   * `this.havingSize(BASESIZE).sizingClasses(this)`.
+   */
+  ;
+
+  _proto.baseSizingClasses = function baseSizingClasses() {
+    if (this.size !== Options.BASESIZE) {
+      return ["sizing", "reset-size" + this.size, "size" + Options.BASESIZE];
+    } else {
+      return [];
+    }
+  }
+  /**
+   * Return the font metrics for this size.
+   */
+  ;
+
+  _proto.fontMetrics = function fontMetrics() {
+    if (!this._fontMetrics) {
+      this._fontMetrics = getGlobalMetrics(this.size);
+    }
+
+    return this._fontMetrics;
+  }
+  /**
+   * Gets the CSS color of the current options object
+   */
+  ;
+
+  _proto.getColor = function getColor() {
+    if (this.phantom) {
+      return "transparent";
+    } else {
+      return this.color;
+    }
+  };
+
+  return Options;
+}();
+
+Options.BASESIZE = 6;
+/* harmony default export */ var src_Options = (Options);
+;// CONCATENATED MODULE: ./src/units.js
+/**
+ * This file does conversion between units.  In particular, it provides
+ * calculateSize to convert other units into ems.
+ */
+
+ // This table gives the number of TeX pts in one of each *absolute* TeX unit.
+// Thus, multiplying a length by this number converts the length from units
+// into pts.  Dividing the result by ptPerEm gives the number of ems
+// *assuming* a font size of ptPerEm (normal size, normal style).
+
+var ptPerUnit = {
+  // https://en.wikibooks.org/wiki/LaTeX/Lengths and
+  // https://tex.stackexchange.com/a/8263
+  "pt": 1,
+  // TeX point
+  "mm": 7227 / 2540,
+  // millimeter
+  "cm": 7227 / 254,
+  // centimeter
+  "in": 72.27,
+  // inch
+  "bp": 803 / 800,
+  // big (PostScript) points
+  "pc": 12,
+  // pica
+  "dd": 1238 / 1157,
+  // didot
+  "cc": 14856 / 1157,
+  // cicero (12 didot)
+  "nd": 685 / 642,
+  // new didot
+  "nc": 1370 / 107,
+  // new cicero (12 new didot)
+  "sp": 1 / 65536,
+  // scaled point (TeX's internal smallest unit)
+  // https://tex.stackexchange.com/a/41371
+  "px": 803 / 800 // \pdfpxdimen defaults to 1 bp in pdfTeX and LuaTeX
+
+}; // Dictionary of relative units, for fast validity testing.
+
+var relativeUnit = {
+  "ex": true,
+  "em": true,
+  "mu": true
+};
+
+/**
+ * Determine whether the specified unit (either a string defining the unit
+ * or a "size" parse node containing a unit field) is valid.
+ */
+var validUnit = function validUnit(unit) {
+  if (typeof unit !== "string") {
+    unit = unit.unit;
+  }
+
+  return unit in ptPerUnit || unit in relativeUnit || unit === "ex";
+};
+/*
+ * Convert a "size" parse node (with numeric "number" and string "unit" fields,
+ * as parsed by functions.js argType "size") into a CSS em value for the
+ * current style/scale.  `options` gives the current options.
+ */
+
+var calculateSize = function calculateSize(sizeValue, options) {
+  var scale;
+
+  if (sizeValue.unit in ptPerUnit) {
+    // Absolute units
+    scale = ptPerUnit[sizeValue.unit] // Convert unit to pt
+    / options.fontMetrics().ptPerEm // Convert pt to CSS em
+    / options.sizeMultiplier; // Unscale to make absolute units
+  } else if (sizeValue.unit === "mu") {
+    // `mu` units scale with scriptstyle/scriptscriptstyle.
+    scale = options.fontMetrics().cssEmPerMu;
+  } else {
+    // Other relative units always refer to the *textstyle* font
+    // in the current size.
+    var unitOptions;
+
+    if (options.style.isTight()) {
+      // isTight() means current style is script/scriptscript.
+      unitOptions = options.havingStyle(options.style.text());
+    } else {
+      unitOptions = options;
+    } // TODO: In TeX these units are relative to the quad of the current
+    // *text* font, e.g. cmr10. KaTeX instead uses values from the
+    // comparably-sized *Computer Modern symbol* font. At 10pt, these
+    // match. At 7pt and 5pt, they differ: cmr7=1.138894, cmsy7=1.170641;
+    // cmr5=1.361133, cmsy5=1.472241. Consider $\scriptsize a\kern1emb$.
+    // TeX \showlists shows a kern of 1.13889 * fontsize;
+    // KaTeX shows a kern of 1.171 * fontsize.
+
+
+    if (sizeValue.unit === "ex") {
+      scale = unitOptions.fontMetrics().xHeight;
+    } else if (sizeValue.unit === "em") {
+      scale = unitOptions.fontMetrics().quad;
+    } else {
+      throw new src_ParseError("Invalid unit: '" + sizeValue.unit + "'");
+    }
+
+    if (unitOptions !== options) {
+      scale *= unitOptions.sizeMultiplier / options.sizeMultiplier;
+    }
+  }
+
+  return Math.min(sizeValue.number * scale, options.maxSize);
+};
+/**
+ * Round `n` to 4 decimal places, or to the nearest 1/10,000th em. See
+ * https://github.com/KaTeX/KaTeX/pull/2460.
+ */
+
+var makeEm = function makeEm(n) {
+  return +n.toFixed(4) + "em";
+};
+;// CONCATENATED MODULE: ./src/domTree.js
+/**
+ * These objects store the data about the DOM nodes we create, as well as some
+ * extra data. They can then be transformed into real DOM nodes with the
+ * `toNode` function or HTML markup using `toMarkup`. They are useful for both
+ * storing extra properties on the nodes, as well as providing a way to easily
+ * work with the DOM.
+ *
+ * Similar functions for working with MathML nodes exist in mathMLTree.js.
+ *
+ * TODO: refactor `span` and `anchor` into common superclass when
+ * target environments support class inheritance
+ */
+
+
+
+
+
+
+/**
+ * Create an HTML className based on a list of classes. In addition to joining
+ * with spaces, we also remove empty classes.
+ */
+var createClass = function createClass(classes) {
+  return classes.filter(function (cls) {
+    return cls;
+  }).join(" ");
+};
+
+var initNode = function initNode(classes, options, style) {
+  this.classes = classes || [];
+  this.attributes = {};
+  this.height = 0;
+  this.depth = 0;
+  this.maxFontSize = 0;
+  this.style = style || {};
+
+  if (options) {
+    if (options.style.isTight()) {
+      this.classes.push("mtight");
+    }
+
+    var color = options.getColor();
+
+    if (color) {
+      this.style.color = color;
+    }
+  }
+};
+/**
+ * Convert into an HTML node
+ */
+
+
+var _toNode = function toNode(tagName) {
+  var node = document.createElement(tagName); // Apply the class
+
+  node.className = createClass(this.classes); // Apply inline styles
+
+  for (var style in this.style) {
+    if (this.style.hasOwnProperty(style)) {
+      // $FlowFixMe Flow doesn't seem to understand span.style's type.
+      node.style[style] = this.style[style];
+    }
+  } // Apply attributes
+
+
+  for (var attr in this.attributes) {
+    if (this.attributes.hasOwnProperty(attr)) {
+      node.setAttribute(attr, this.attributes[attr]);
+    }
+  } // Append the children, also as HTML nodes
+
+
+  for (var i = 0; i < this.children.length; i++) {
+    node.appendChild(this.children[i].toNode());
+  }
+
+  return node;
+};
+/**
+ * Convert into an HTML markup string
+ */
+
+
+var _toMarkup = function toMarkup(tagName) {
+  var markup = "<" + tagName; // Add the class
+
+  if (this.classes.length) {
+    markup += " class=\"" + utils.escape(createClass(this.classes)) + "\"";
+  }
+
+  var styles = ""; // Add the styles, after hyphenation
+
+  for (var style in this.style) {
+    if (this.style.hasOwnProperty(style)) {
+      styles += utils.hyphenate(style) + ":" + this.style[style] + ";";
+    }
+  }
+
+  if (styles) {
+    markup += " style=\"" + utils.escape(styles) + "\"";
+  } // Add the attributes
+
+
+  for (var attr in this.attributes) {
+    if (this.attributes.hasOwnProperty(attr)) {
+      markup += " " + attr + "=\"" + utils.escape(this.attributes[attr]) + "\"";
+    }
+  }
+
+  markup += ">"; // Add the markup of the children, also as markup
+
+  for (var i = 0; i < this.children.length; i++) {
+    markup += this.children[i].toMarkup();
+  }
+
+  markup += "";
+  return markup;
+}; // Making the type below exact with all optional fields doesn't work due to
+// - https://github.com/facebook/flow/issues/4582
+// - https://github.com/facebook/flow/issues/5688
+// However, since *all* fields are optional, $Shape<> works as suggested in 5688
+// above.
+// This type does not include all CSS properties. Additional properties should
+// be added as needed.
+
+
+/**
+ * This node represents a span node, with a className, a list of children, and
+ * an inline style. It also contains information about its height, depth, and
+ * maxFontSize.
+ *
+ * Represents two types with different uses: SvgSpan to wrap an SVG and DomSpan
+ * otherwise. This typesafety is important when HTML builders access a span's
+ * children.
+ */
+var Span = /*#__PURE__*/function () {
+  function Span(classes, children, options, style) {
+    this.children = void 0;
+    this.attributes = void 0;
+    this.classes = void 0;
+    this.height = void 0;
+    this.depth = void 0;
+    this.width = void 0;
+    this.maxFontSize = void 0;
+    this.style = void 0;
+    initNode.call(this, classes, options, style);
+    this.children = children || [];
+  }
+  /**
+   * Sets an arbitrary attribute on the span. Warning: use this wisely. Not
+   * all browsers support attributes the same, and having too many custom
+   * attributes is probably bad.
+   */
+
+
+  var _proto = Span.prototype;
+
+  _proto.setAttribute = function setAttribute(attribute, value) {
+    this.attributes[attribute] = value;
+  };
+
+  _proto.hasClass = function hasClass(className) {
+    return utils.contains(this.classes, className);
+  };
+
+  _proto.toNode = function toNode() {
+    return _toNode.call(this, "span");
+  };
+
+  _proto.toMarkup = function toMarkup() {
+    return _toMarkup.call(this, "span");
+  };
+
+  return Span;
+}();
+/**
+ * This node represents an anchor () element with a hyperlink.  See `span`
+ * for further details.
+ */
+
+var Anchor = /*#__PURE__*/function () {
+  function Anchor(href, classes, children, options) {
+    this.children = void 0;
+    this.attributes = void 0;
+    this.classes = void 0;
+    this.height = void 0;
+    this.depth = void 0;
+    this.maxFontSize = void 0;
+    this.style = void 0;
+    initNode.call(this, classes, options);
+    this.children = children || [];
+    this.setAttribute('href', href);
+  }
+
+  var _proto2 = Anchor.prototype;
+
+  _proto2.setAttribute = function setAttribute(attribute, value) {
+    this.attributes[attribute] = value;
+  };
+
+  _proto2.hasClass = function hasClass(className) {
+    return utils.contains(this.classes, className);
+  };
+
+  _proto2.toNode = function toNode() {
+    return _toNode.call(this, "a");
+  };
+
+  _proto2.toMarkup = function toMarkup() {
+    return _toMarkup.call(this, "a");
+  };
+
+  return Anchor;
+}();
+/**
+ * This node represents an image embed () element.
+ */
+
+var Img = /*#__PURE__*/function () {
+  function Img(src, alt, style) {
+    this.src = void 0;
+    this.alt = void 0;
+    this.classes = void 0;
+    this.height = void 0;
+    this.depth = void 0;
+    this.maxFontSize = void 0;
+    this.style = void 0;
+    this.alt = alt;
+    this.src = src;
+    this.classes = ["mord"];
+    this.style = style;
+  }
+
+  var _proto3 = Img.prototype;
+
+  _proto3.hasClass = function hasClass(className) {
+    return utils.contains(this.classes, className);
+  };
+
+  _proto3.toNode = function toNode() {
+    var node = document.createElement("img");
+    node.src = this.src;
+    node.alt = this.alt;
+    node.className = "mord"; // Apply inline styles
+
+    for (var style in this.style) {
+      if (this.style.hasOwnProperty(style)) {
+        // $FlowFixMe
+        node.style[style] = this.style[style];
+      }
+    }
+
+    return node;
+  };
+
+  _proto3.toMarkup = function toMarkup() {
+    var markup = "" + this.alt + " 0) {
+      span = document.createElement("span");
+      span.style.marginRight = makeEm(this.italic);
+    }
+
+    if (this.classes.length > 0) {
+      span = span || document.createElement("span");
+      span.className = createClass(this.classes);
+    }
+
+    for (var style in this.style) {
+      if (this.style.hasOwnProperty(style)) {
+        span = span || document.createElement("span"); // $FlowFixMe Flow doesn't seem to understand span.style's type.
+
+        span.style[style] = this.style[style];
+      }
+    }
+
+    if (span) {
+      span.appendChild(node);
+      return span;
+    } else {
+      return node;
+    }
+  }
+  /**
+   * Creates markup for a symbol node.
+   */
+  ;
+
+  _proto4.toMarkup = function toMarkup() {
+    // TODO(alpert): More duplication than I'd like from
+    // span.prototype.toMarkup and symbolNode.prototype.toNode...
+    var needsSpan = false;
+    var markup = " 0) {
+      styles += "margin-right:" + this.italic + "em;";
+    }
+
+    for (var style in this.style) {
+      if (this.style.hasOwnProperty(style)) {
+        styles += utils.hyphenate(style) + ":" + this.style[style] + ";";
+      }
+    }
+
+    if (styles) {
+      needsSpan = true;
+      markup += " style=\"" + utils.escape(styles) + "\"";
+    }
+
+    var escaped = utils.escape(this.text);
+
+    if (needsSpan) {
+      markup += ">";
+      markup += escaped;
+      markup += "";
+      return markup;
+    } else {
+      return escaped;
+    }
+  };
+
+  return SymbolNode;
+}();
+/**
+ * SVG nodes are used to render stretchy wide elements.
+ */
+
+var SvgNode = /*#__PURE__*/function () {
+  function SvgNode(children, attributes) {
+    this.children = void 0;
+    this.attributes = void 0;
+    this.children = children || [];
+    this.attributes = attributes || {};
+  }
+
+  var _proto5 = SvgNode.prototype;
+
+  _proto5.toNode = function toNode() {
+    var svgNS = "http://www.w3.org/2000/svg";
+    var node = document.createElementNS(svgNS, "svg"); // Apply attributes
+
+    for (var attr in this.attributes) {
+      if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
+        node.setAttribute(attr, this.attributes[attr]);
+      }
+    }
+
+    for (var i = 0; i < this.children.length; i++) {
+      node.appendChild(this.children[i].toNode());
+    }
+
+    return node;
+  };
+
+  _proto5.toMarkup = function toMarkup() {
+    var markup = "";
+    } else {
+      return "";
+    }
+  };
+
+  return PathNode;
+}();
+var LineNode = /*#__PURE__*/function () {
+  function LineNode(attributes) {
+    this.attributes = void 0;
+    this.attributes = attributes || {};
+  }
+
+  var _proto7 = LineNode.prototype;
+
+  _proto7.toNode = function toNode() {
+    var svgNS = "http://www.w3.org/2000/svg";
+    var node = document.createElementNS(svgNS, "line"); // Apply attributes
+
+    for (var attr in this.attributes) {
+      if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
+        node.setAttribute(attr, this.attributes[attr]);
+      }
+    }
+
+    return node;
+  };
+
+  _proto7.toMarkup = function toMarkup() {
+    var markup = " but got " + String(group) + ".");
+  }
+}
+;// CONCATENATED MODULE: ./src/symbols.js
+/**
+ * This file holds a list of all no-argument functions and single-character
+ * symbols (like 'a' or ';').
+ *
+ * For each of the symbols, there are three properties they can have:
+ * - font (required): the font to be used for this symbol. Either "main" (the
+     normal font), or "ams" (the ams fonts).
+ * - group (required): the ParseNode group type the symbol should have (i.e.
+     "textord", "mathord", etc).
+     See https://github.com/KaTeX/KaTeX/wiki/Examining-TeX#group-types
+ * - replace: the character that this symbol or function should be
+ *   replaced with (i.e. "\phi" has a replace value of "\u03d5", the phi
+ *   character in the main font).
+ *
+ * The outermost map in the table indicates what mode the symbols should be
+ * accepted in (e.g. "math" or "text").
+ */
+// Some of these have a "-token" suffix since these are also used as `ParseNode`
+// types for raw text tokens, and we want to avoid conflicts with higher-level
+// `ParseNode` types. These `ParseNode`s are constructed within `Parser` by
+// looking up the `symbols` map.
+var ATOMS = {
+  "bin": 1,
+  "close": 1,
+  "inner": 1,
+  "open": 1,
+  "punct": 1,
+  "rel": 1
+};
+var NON_ATOMS = {
+  "accent-token": 1,
+  "mathord": 1,
+  "op-token": 1,
+  "spacing": 1,
+  "textord": 1
+};
+var symbols = {
+  "math": {},
+  "text": {}
+};
+/* harmony default export */ var src_symbols = (symbols);
+/** `acceptUnicodeChar = true` is only applicable if `replace` is set. */
+
+function defineSymbol(mode, font, group, replace, name, acceptUnicodeChar) {
+  symbols[mode][name] = {
+    font: font,
+    group: group,
+    replace: replace
+  };
+
+  if (acceptUnicodeChar && replace) {
+    symbols[mode][replace] = symbols[mode][name];
+  }
+} // Some abbreviations for commonly used strings.
+// This helps minify the code, and also spotting typos using jshint.
+// modes:
+
+var math = "math";
+var symbols_text = "text"; // fonts:
+
+var main = "main";
+var ams = "ams"; // groups:
+
+var accent = "accent-token";
+var bin = "bin";
+var symbols_close = "close";
+var inner = "inner";
+var mathord = "mathord";
+var op = "op-token";
+var symbols_open = "open";
+var punct = "punct";
+var rel = "rel";
+var spacing = "spacing";
+var textord = "textord"; // Now comes the symbol table
+// Relation Symbols
+
+defineSymbol(math, main, rel, "\u2261", "\\equiv", true);
+defineSymbol(math, main, rel, "\u227A", "\\prec", true);
+defineSymbol(math, main, rel, "\u227B", "\\succ", true);
+defineSymbol(math, main, rel, "\u223C", "\\sim", true);
+defineSymbol(math, main, rel, "\u22A5", "\\perp");
+defineSymbol(math, main, rel, "\u2AAF", "\\preceq", true);
+defineSymbol(math, main, rel, "\u2AB0", "\\succeq", true);
+defineSymbol(math, main, rel, "\u2243", "\\simeq", true);
+defineSymbol(math, main, rel, "\u2223", "\\mid", true);
+defineSymbol(math, main, rel, "\u226A", "\\ll", true);
+defineSymbol(math, main, rel, "\u226B", "\\gg", true);
+defineSymbol(math, main, rel, "\u224D", "\\asymp", true);
+defineSymbol(math, main, rel, "\u2225", "\\parallel");
+defineSymbol(math, main, rel, "\u22C8", "\\bowtie", true);
+defineSymbol(math, main, rel, "\u2323", "\\smile", true);
+defineSymbol(math, main, rel, "\u2291", "\\sqsubseteq", true);
+defineSymbol(math, main, rel, "\u2292", "\\sqsupseteq", true);
+defineSymbol(math, main, rel, "\u2250", "\\doteq", true);
+defineSymbol(math, main, rel, "\u2322", "\\frown", true);
+defineSymbol(math, main, rel, "\u220B", "\\ni", true);
+defineSymbol(math, main, rel, "\u221D", "\\propto", true);
+defineSymbol(math, main, rel, "\u22A2", "\\vdash", true);
+defineSymbol(math, main, rel, "\u22A3", "\\dashv", true);
+defineSymbol(math, main, rel, "\u220B", "\\owns"); // Punctuation
+
+defineSymbol(math, main, punct, ".", "\\ldotp");
+defineSymbol(math, main, punct, "\u22C5", "\\cdotp"); // Misc Symbols
+
+defineSymbol(math, main, textord, "#", "\\#");
+defineSymbol(symbols_text, main, textord, "#", "\\#");
+defineSymbol(math, main, textord, "&", "\\&");
+defineSymbol(symbols_text, main, textord, "&", "\\&");
+defineSymbol(math, main, textord, "\u2135", "\\aleph", true);
+defineSymbol(math, main, textord, "\u2200", "\\forall", true);
+defineSymbol(math, main, textord, "\u210F", "\\hbar", true);
+defineSymbol(math, main, textord, "\u2203", "\\exists", true);
+defineSymbol(math, main, textord, "\u2207", "\\nabla", true);
+defineSymbol(math, main, textord, "\u266D", "\\flat", true);
+defineSymbol(math, main, textord, "\u2113", "\\ell", true);
+defineSymbol(math, main, textord, "\u266E", "\\natural", true);
+defineSymbol(math, main, textord, "\u2663", "\\clubsuit", true);
+defineSymbol(math, main, textord, "\u2118", "\\wp", true);
+defineSymbol(math, main, textord, "\u266F", "\\sharp", true);
+defineSymbol(math, main, textord, "\u2662", "\\diamondsuit", true);
+defineSymbol(math, main, textord, "\u211C", "\\Re", true);
+defineSymbol(math, main, textord, "\u2661", "\\heartsuit", true);
+defineSymbol(math, main, textord, "\u2111", "\\Im", true);
+defineSymbol(math, main, textord, "\u2660", "\\spadesuit", true);
+defineSymbol(math, main, textord, "\xA7", "\\S", true);
+defineSymbol(symbols_text, main, textord, "\xA7", "\\S");
+defineSymbol(math, main, textord, "\xB6", "\\P", true);
+defineSymbol(symbols_text, main, textord, "\xB6", "\\P"); // Math and Text
+
+defineSymbol(math, main, textord, "\u2020", "\\dag");
+defineSymbol(symbols_text, main, textord, "\u2020", "\\dag");
+defineSymbol(symbols_text, main, textord, "\u2020", "\\textdagger");
+defineSymbol(math, main, textord, "\u2021", "\\ddag");
+defineSymbol(symbols_text, main, textord, "\u2021", "\\ddag");
+defineSymbol(symbols_text, main, textord, "\u2021", "\\textdaggerdbl"); // Large Delimiters
+
+defineSymbol(math, main, symbols_close, "\u23B1", "\\rmoustache", true);
+defineSymbol(math, main, symbols_open, "\u23B0", "\\lmoustache", true);
+defineSymbol(math, main, symbols_close, "\u27EF", "\\rgroup", true);
+defineSymbol(math, main, symbols_open, "\u27EE", "\\lgroup", true); // Binary Operators
+
+defineSymbol(math, main, bin, "\u2213", "\\mp", true);
+defineSymbol(math, main, bin, "\u2296", "\\ominus", true);
+defineSymbol(math, main, bin, "\u228E", "\\uplus", true);
+defineSymbol(math, main, bin, "\u2293", "\\sqcap", true);
+defineSymbol(math, main, bin, "\u2217", "\\ast");
+defineSymbol(math, main, bin, "\u2294", "\\sqcup", true);
+defineSymbol(math, main, bin, "\u25EF", "\\bigcirc", true);
+defineSymbol(math, main, bin, "\u2219", "\\bullet", true);
+defineSymbol(math, main, bin, "\u2021", "\\ddagger");
+defineSymbol(math, main, bin, "\u2240", "\\wr", true);
+defineSymbol(math, main, bin, "\u2A3F", "\\amalg");
+defineSymbol(math, main, bin, "&", "\\And"); // from amsmath
+// Arrow Symbols
+
+defineSymbol(math, main, rel, "\u27F5", "\\longleftarrow", true);
+defineSymbol(math, main, rel, "\u21D0", "\\Leftarrow", true);
+defineSymbol(math, main, rel, "\u27F8", "\\Longleftarrow", true);
+defineSymbol(math, main, rel, "\u27F6", "\\longrightarrow", true);
+defineSymbol(math, main, rel, "\u21D2", "\\Rightarrow", true);
+defineSymbol(math, main, rel, "\u27F9", "\\Longrightarrow", true);
+defineSymbol(math, main, rel, "\u2194", "\\leftrightarrow", true);
+defineSymbol(math, main, rel, "\u27F7", "\\longleftrightarrow", true);
+defineSymbol(math, main, rel, "\u21D4", "\\Leftrightarrow", true);
+defineSymbol(math, main, rel, "\u27FA", "\\Longleftrightarrow", true);
+defineSymbol(math, main, rel, "\u21A6", "\\mapsto", true);
+defineSymbol(math, main, rel, "\u27FC", "\\longmapsto", true);
+defineSymbol(math, main, rel, "\u2197", "\\nearrow", true);
+defineSymbol(math, main, rel, "\u21A9", "\\hookleftarrow", true);
+defineSymbol(math, main, rel, "\u21AA", "\\hookrightarrow", true);
+defineSymbol(math, main, rel, "\u2198", "\\searrow", true);
+defineSymbol(math, main, rel, "\u21BC", "\\leftharpoonup", true);
+defineSymbol(math, main, rel, "\u21C0", "\\rightharpoonup", true);
+defineSymbol(math, main, rel, "\u2199", "\\swarrow", true);
+defineSymbol(math, main, rel, "\u21BD", "\\leftharpoondown", true);
+defineSymbol(math, main, rel, "\u21C1", "\\rightharpoondown", true);
+defineSymbol(math, main, rel, "\u2196", "\\nwarrow", true);
+defineSymbol(math, main, rel, "\u21CC", "\\rightleftharpoons", true); // AMS Negated Binary Relations
+
+defineSymbol(math, ams, rel, "\u226E", "\\nless", true); // Symbol names preceeded by "@" each have a corresponding macro.
+
+defineSymbol(math, ams, rel, "\uE010", "\\@nleqslant");
+defineSymbol(math, ams, rel, "\uE011", "\\@nleqq");
+defineSymbol(math, ams, rel, "\u2A87", "\\lneq", true);
+defineSymbol(math, ams, rel, "\u2268", "\\lneqq", true);
+defineSymbol(math, ams, rel, "\uE00C", "\\@lvertneqq");
+defineSymbol(math, ams, rel, "\u22E6", "\\lnsim", true);
+defineSymbol(math, ams, rel, "\u2A89", "\\lnapprox", true);
+defineSymbol(math, ams, rel, "\u2280", "\\nprec", true); // unicode-math maps \u22e0 to \npreccurlyeq. We'll use the AMS synonym.
+
+defineSymbol(math, ams, rel, "\u22E0", "\\npreceq", true);
+defineSymbol(math, ams, rel, "\u22E8", "\\precnsim", true);
+defineSymbol(math, ams, rel, "\u2AB9", "\\precnapprox", true);
+defineSymbol(math, ams, rel, "\u2241", "\\nsim", true);
+defineSymbol(math, ams, rel, "\uE006", "\\@nshortmid");
+defineSymbol(math, ams, rel, "\u2224", "\\nmid", true);
+defineSymbol(math, ams, rel, "\u22AC", "\\nvdash", true);
+defineSymbol(math, ams, rel, "\u22AD", "\\nvDash", true);
+defineSymbol(math, ams, rel, "\u22EA", "\\ntriangleleft");
+defineSymbol(math, ams, rel, "\u22EC", "\\ntrianglelefteq", true);
+defineSymbol(math, ams, rel, "\u228A", "\\subsetneq", true);
+defineSymbol(math, ams, rel, "\uE01A", "\\@varsubsetneq");
+defineSymbol(math, ams, rel, "\u2ACB", "\\subsetneqq", true);
+defineSymbol(math, ams, rel, "\uE017", "\\@varsubsetneqq");
+defineSymbol(math, ams, rel, "\u226F", "\\ngtr", true);
+defineSymbol(math, ams, rel, "\uE00F", "\\@ngeqslant");
+defineSymbol(math, ams, rel, "\uE00E", "\\@ngeqq");
+defineSymbol(math, ams, rel, "\u2A88", "\\gneq", true);
+defineSymbol(math, ams, rel, "\u2269", "\\gneqq", true);
+defineSymbol(math, ams, rel, "\uE00D", "\\@gvertneqq");
+defineSymbol(math, ams, rel, "\u22E7", "\\gnsim", true);
+defineSymbol(math, ams, rel, "\u2A8A", "\\gnapprox", true);
+defineSymbol(math, ams, rel, "\u2281", "\\nsucc", true); // unicode-math maps \u22e1 to \nsucccurlyeq. We'll use the AMS synonym.
+
+defineSymbol(math, ams, rel, "\u22E1", "\\nsucceq", true);
+defineSymbol(math, ams, rel, "\u22E9", "\\succnsim", true);
+defineSymbol(math, ams, rel, "\u2ABA", "\\succnapprox", true); // unicode-math maps \u2246 to \simneqq. We'll use the AMS synonym.
+
+defineSymbol(math, ams, rel, "\u2246", "\\ncong", true);
+defineSymbol(math, ams, rel, "\uE007", "\\@nshortparallel");
+defineSymbol(math, ams, rel, "\u2226", "\\nparallel", true);
+defineSymbol(math, ams, rel, "\u22AF", "\\nVDash", true);
+defineSymbol(math, ams, rel, "\u22EB", "\\ntriangleright");
+defineSymbol(math, ams, rel, "\u22ED", "\\ntrianglerighteq", true);
+defineSymbol(math, ams, rel, "\uE018", "\\@nsupseteqq");
+defineSymbol(math, ams, rel, "\u228B", "\\supsetneq", true);
+defineSymbol(math, ams, rel, "\uE01B", "\\@varsupsetneq");
+defineSymbol(math, ams, rel, "\u2ACC", "\\supsetneqq", true);
+defineSymbol(math, ams, rel, "\uE019", "\\@varsupsetneqq");
+defineSymbol(math, ams, rel, "\u22AE", "\\nVdash", true);
+defineSymbol(math, ams, rel, "\u2AB5", "\\precneqq", true);
+defineSymbol(math, ams, rel, "\u2AB6", "\\succneqq", true);
+defineSymbol(math, ams, rel, "\uE016", "\\@nsubseteqq");
+defineSymbol(math, ams, bin, "\u22B4", "\\unlhd");
+defineSymbol(math, ams, bin, "\u22B5", "\\unrhd"); // AMS Negated Arrows
+
+defineSymbol(math, ams, rel, "\u219A", "\\nleftarrow", true);
+defineSymbol(math, ams, rel, "\u219B", "\\nrightarrow", true);
+defineSymbol(math, ams, rel, "\u21CD", "\\nLeftarrow", true);
+defineSymbol(math, ams, rel, "\u21CF", "\\nRightarrow", true);
+defineSymbol(math, ams, rel, "\u21AE", "\\nleftrightarrow", true);
+defineSymbol(math, ams, rel, "\u21CE", "\\nLeftrightarrow", true); // AMS Misc
+
+defineSymbol(math, ams, rel, "\u25B3", "\\vartriangle");
+defineSymbol(math, ams, textord, "\u210F", "\\hslash");
+defineSymbol(math, ams, textord, "\u25BD", "\\triangledown");
+defineSymbol(math, ams, textord, "\u25CA", "\\lozenge");
+defineSymbol(math, ams, textord, "\u24C8", "\\circledS");
+defineSymbol(math, ams, textord, "\xAE", "\\circledR");
+defineSymbol(symbols_text, ams, textord, "\xAE", "\\circledR");
+defineSymbol(math, ams, textord, "\u2221", "\\measuredangle", true);
+defineSymbol(math, ams, textord, "\u2204", "\\nexists");
+defineSymbol(math, ams, textord, "\u2127", "\\mho");
+defineSymbol(math, ams, textord, "\u2132", "\\Finv", true);
+defineSymbol(math, ams, textord, "\u2141", "\\Game", true);
+defineSymbol(math, ams, textord, "\u2035", "\\backprime");
+defineSymbol(math, ams, textord, "\u25B2", "\\blacktriangle");
+defineSymbol(math, ams, textord, "\u25BC", "\\blacktriangledown");
+defineSymbol(math, ams, textord, "\u25A0", "\\blacksquare");
+defineSymbol(math, ams, textord, "\u29EB", "\\blacklozenge");
+defineSymbol(math, ams, textord, "\u2605", "\\bigstar");
+defineSymbol(math, ams, textord, "\u2222", "\\sphericalangle", true);
+defineSymbol(math, ams, textord, "\u2201", "\\complement", true); // unicode-math maps U+F0 to \matheth. We map to AMS function \eth
+
+defineSymbol(math, ams, textord, "\xF0", "\\eth", true);
+defineSymbol(symbols_text, main, textord, "\xF0", "\xF0");
+defineSymbol(math, ams, textord, "\u2571", "\\diagup");
+defineSymbol(math, ams, textord, "\u2572", "\\diagdown");
+defineSymbol(math, ams, textord, "\u25A1", "\\square");
+defineSymbol(math, ams, textord, "\u25A1", "\\Box");
+defineSymbol(math, ams, textord, "\u25CA", "\\Diamond"); // unicode-math maps U+A5 to \mathyen. We map to AMS function \yen
+
+defineSymbol(math, ams, textord, "\xA5", "\\yen", true);
+defineSymbol(symbols_text, ams, textord, "\xA5", "\\yen", true);
+defineSymbol(math, ams, textord, "\u2713", "\\checkmark", true);
+defineSymbol(symbols_text, ams, textord, "\u2713", "\\checkmark"); // AMS Hebrew
+
+defineSymbol(math, ams, textord, "\u2136", "\\beth", true);
+defineSymbol(math, ams, textord, "\u2138", "\\daleth", true);
+defineSymbol(math, ams, textord, "\u2137", "\\gimel", true); // AMS Greek
+
+defineSymbol(math, ams, textord, "\u03DD", "\\digamma", true);
+defineSymbol(math, ams, textord, "\u03F0", "\\varkappa"); // AMS Delimiters
+
+defineSymbol(math, ams, symbols_open, "\u250C", "\\@ulcorner", true);
+defineSymbol(math, ams, symbols_close, "\u2510", "\\@urcorner", true);
+defineSymbol(math, ams, symbols_open, "\u2514", "\\@llcorner", true);
+defineSymbol(math, ams, symbols_close, "\u2518", "\\@lrcorner", true); // AMS Binary Relations
+
+defineSymbol(math, ams, rel, "\u2266", "\\leqq", true);
+defineSymbol(math, ams, rel, "\u2A7D", "\\leqslant", true);
+defineSymbol(math, ams, rel, "\u2A95", "\\eqslantless", true);
+defineSymbol(math, ams, rel, "\u2272", "\\lesssim", true);
+defineSymbol(math, ams, rel, "\u2A85", "\\lessapprox", true);
+defineSymbol(math, ams, rel, "\u224A", "\\approxeq", true);
+defineSymbol(math, ams, bin, "\u22D6", "\\lessdot");
+defineSymbol(math, ams, rel, "\u22D8", "\\lll", true);
+defineSymbol(math, ams, rel, "\u2276", "\\lessgtr", true);
+defineSymbol(math, ams, rel, "\u22DA", "\\lesseqgtr", true);
+defineSymbol(math, ams, rel, "\u2A8B", "\\lesseqqgtr", true);
+defineSymbol(math, ams, rel, "\u2251", "\\doteqdot");
+defineSymbol(math, ams, rel, "\u2253", "\\risingdotseq", true);
+defineSymbol(math, ams, rel, "\u2252", "\\fallingdotseq", true);
+defineSymbol(math, ams, rel, "\u223D", "\\backsim", true);
+defineSymbol(math, ams, rel, "\u22CD", "\\backsimeq", true);
+defineSymbol(math, ams, rel, "\u2AC5", "\\subseteqq", true);
+defineSymbol(math, ams, rel, "\u22D0", "\\Subset", true);
+defineSymbol(math, ams, rel, "\u228F", "\\sqsubset", true);
+defineSymbol(math, ams, rel, "\u227C", "\\preccurlyeq", true);
+defineSymbol(math, ams, rel, "\u22DE", "\\curlyeqprec", true);
+defineSymbol(math, ams, rel, "\u227E", "\\precsim", true);
+defineSymbol(math, ams, rel, "\u2AB7", "\\precapprox", true);
+defineSymbol(math, ams, rel, "\u22B2", "\\vartriangleleft");
+defineSymbol(math, ams, rel, "\u22B4", "\\trianglelefteq");
+defineSymbol(math, ams, rel, "\u22A8", "\\vDash", true);
+defineSymbol(math, ams, rel, "\u22AA", "\\Vvdash", true);
+defineSymbol(math, ams, rel, "\u2323", "\\smallsmile");
+defineSymbol(math, ams, rel, "\u2322", "\\smallfrown");
+defineSymbol(math, ams, rel, "\u224F", "\\bumpeq", true);
+defineSymbol(math, ams, rel, "\u224E", "\\Bumpeq", true);
+defineSymbol(math, ams, rel, "\u2267", "\\geqq", true);
+defineSymbol(math, ams, rel, "\u2A7E", "\\geqslant", true);
+defineSymbol(math, ams, rel, "\u2A96", "\\eqslantgtr", true);
+defineSymbol(math, ams, rel, "\u2273", "\\gtrsim", true);
+defineSymbol(math, ams, rel, "\u2A86", "\\gtrapprox", true);
+defineSymbol(math, ams, bin, "\u22D7", "\\gtrdot");
+defineSymbol(math, ams, rel, "\u22D9", "\\ggg", true);
+defineSymbol(math, ams, rel, "\u2277", "\\gtrless", true);
+defineSymbol(math, ams, rel, "\u22DB", "\\gtreqless", true);
+defineSymbol(math, ams, rel, "\u2A8C", "\\gtreqqless", true);
+defineSymbol(math, ams, rel, "\u2256", "\\eqcirc", true);
+defineSymbol(math, ams, rel, "\u2257", "\\circeq", true);
+defineSymbol(math, ams, rel, "\u225C", "\\triangleq", true);
+defineSymbol(math, ams, rel, "\u223C", "\\thicksim");
+defineSymbol(math, ams, rel, "\u2248", "\\thickapprox");
+defineSymbol(math, ams, rel, "\u2AC6", "\\supseteqq", true);
+defineSymbol(math, ams, rel, "\u22D1", "\\Supset", true);
+defineSymbol(math, ams, rel, "\u2290", "\\sqsupset", true);
+defineSymbol(math, ams, rel, "\u227D", "\\succcurlyeq", true);
+defineSymbol(math, ams, rel, "\u22DF", "\\curlyeqsucc", true);
+defineSymbol(math, ams, rel, "\u227F", "\\succsim", true);
+defineSymbol(math, ams, rel, "\u2AB8", "\\succapprox", true);
+defineSymbol(math, ams, rel, "\u22B3", "\\vartriangleright");
+defineSymbol(math, ams, rel, "\u22B5", "\\trianglerighteq");
+defineSymbol(math, ams, rel, "\u22A9", "\\Vdash", true);
+defineSymbol(math, ams, rel, "\u2223", "\\shortmid");
+defineSymbol(math, ams, rel, "\u2225", "\\shortparallel");
+defineSymbol(math, ams, rel, "\u226C", "\\between", true);
+defineSymbol(math, ams, rel, "\u22D4", "\\pitchfork", true);
+defineSymbol(math, ams, rel, "\u221D", "\\varpropto");
+defineSymbol(math, ams, rel, "\u25C0", "\\blacktriangleleft"); // unicode-math says that \therefore is a mathord atom.
+// We kept the amssymb atom type, which is rel.
+
+defineSymbol(math, ams, rel, "\u2234", "\\therefore", true);
+defineSymbol(math, ams, rel, "\u220D", "\\backepsilon");
+defineSymbol(math, ams, rel, "\u25B6", "\\blacktriangleright"); // unicode-math says that \because is a mathord atom.
+// We kept the amssymb atom type, which is rel.
+
+defineSymbol(math, ams, rel, "\u2235", "\\because", true);
+defineSymbol(math, ams, rel, "\u22D8", "\\llless");
+defineSymbol(math, ams, rel, "\u22D9", "\\gggtr");
+defineSymbol(math, ams, bin, "\u22B2", "\\lhd");
+defineSymbol(math, ams, bin, "\u22B3", "\\rhd");
+defineSymbol(math, ams, rel, "\u2242", "\\eqsim", true);
+defineSymbol(math, main, rel, "\u22C8", "\\Join");
+defineSymbol(math, ams, rel, "\u2251", "\\Doteq", true); // AMS Binary Operators
+
+defineSymbol(math, ams, bin, "\u2214", "\\dotplus", true);
+defineSymbol(math, ams, bin, "\u2216", "\\smallsetminus");
+defineSymbol(math, ams, bin, "\u22D2", "\\Cap", true);
+defineSymbol(math, ams, bin, "\u22D3", "\\Cup", true);
+defineSymbol(math, ams, bin, "\u2A5E", "\\doublebarwedge", true);
+defineSymbol(math, ams, bin, "\u229F", "\\boxminus", true);
+defineSymbol(math, ams, bin, "\u229E", "\\boxplus", true);
+defineSymbol(math, ams, bin, "\u22C7", "\\divideontimes", true);
+defineSymbol(math, ams, bin, "\u22C9", "\\ltimes", true);
+defineSymbol(math, ams, bin, "\u22CA", "\\rtimes", true);
+defineSymbol(math, ams, bin, "\u22CB", "\\leftthreetimes", true);
+defineSymbol(math, ams, bin, "\u22CC", "\\rightthreetimes", true);
+defineSymbol(math, ams, bin, "\u22CF", "\\curlywedge", true);
+defineSymbol(math, ams, bin, "\u22CE", "\\curlyvee", true);
+defineSymbol(math, ams, bin, "\u229D", "\\circleddash", true);
+defineSymbol(math, ams, bin, "\u229B", "\\circledast", true);
+defineSymbol(math, ams, bin, "\u22C5", "\\centerdot");
+defineSymbol(math, ams, bin, "\u22BA", "\\intercal", true);
+defineSymbol(math, ams, bin, "\u22D2", "\\doublecap");
+defineSymbol(math, ams, bin, "\u22D3", "\\doublecup");
+defineSymbol(math, ams, bin, "\u22A0", "\\boxtimes", true); // AMS Arrows
+// Note: unicode-math maps \u21e2 to their own function \rightdasharrow.
+// We'll map it to AMS function \dashrightarrow. It produces the same atom.
+
+defineSymbol(math, ams, rel, "\u21E2", "\\dashrightarrow", true); // unicode-math maps \u21e0 to \leftdasharrow. We'll use the AMS synonym.
+
+defineSymbol(math, ams, rel, "\u21E0", "\\dashleftarrow", true);
+defineSymbol(math, ams, rel, "\u21C7", "\\leftleftarrows", true);
+defineSymbol(math, ams, rel, "\u21C6", "\\leftrightarrows", true);
+defineSymbol(math, ams, rel, "\u21DA", "\\Lleftarrow", true);
+defineSymbol(math, ams, rel, "\u219E", "\\twoheadleftarrow", true);
+defineSymbol(math, ams, rel, "\u21A2", "\\leftarrowtail", true);
+defineSymbol(math, ams, rel, "\u21AB", "\\looparrowleft", true);
+defineSymbol(math, ams, rel, "\u21CB", "\\leftrightharpoons", true);
+defineSymbol(math, ams, rel, "\u21B6", "\\curvearrowleft", true); // unicode-math maps \u21ba to \acwopencirclearrow. We'll use the AMS synonym.
+
+defineSymbol(math, ams, rel, "\u21BA", "\\circlearrowleft", true);
+defineSymbol(math, ams, rel, "\u21B0", "\\Lsh", true);
+defineSymbol(math, ams, rel, "\u21C8", "\\upuparrows", true);
+defineSymbol(math, ams, rel, "\u21BF", "\\upharpoonleft", true);
+defineSymbol(math, ams, rel, "\u21C3", "\\downharpoonleft", true);
+defineSymbol(math, main, rel, "\u22B6", "\\origof", true); // not in font
+
+defineSymbol(math, main, rel, "\u22B7", "\\imageof", true); // not in font
+
+defineSymbol(math, ams, rel, "\u22B8", "\\multimap", true);
+defineSymbol(math, ams, rel, "\u21AD", "\\leftrightsquigarrow", true);
+defineSymbol(math, ams, rel, "\u21C9", "\\rightrightarrows", true);
+defineSymbol(math, ams, rel, "\u21C4", "\\rightleftarrows", true);
+defineSymbol(math, ams, rel, "\u21A0", "\\twoheadrightarrow", true);
+defineSymbol(math, ams, rel, "\u21A3", "\\rightarrowtail", true);
+defineSymbol(math, ams, rel, "\u21AC", "\\looparrowright", true);
+defineSymbol(math, ams, rel, "\u21B7", "\\curvearrowright", true); // unicode-math maps \u21bb to \cwopencirclearrow. We'll use the AMS synonym.
+
+defineSymbol(math, ams, rel, "\u21BB", "\\circlearrowright", true);
+defineSymbol(math, ams, rel, "\u21B1", "\\Rsh", true);
+defineSymbol(math, ams, rel, "\u21CA", "\\downdownarrows", true);
+defineSymbol(math, ams, rel, "\u21BE", "\\upharpoonright", true);
+defineSymbol(math, ams, rel, "\u21C2", "\\downharpoonright", true);
+defineSymbol(math, ams, rel, "\u21DD", "\\rightsquigarrow", true);
+defineSymbol(math, ams, rel, "\u21DD", "\\leadsto");
+defineSymbol(math, ams, rel, "\u21DB", "\\Rrightarrow", true);
+defineSymbol(math, ams, rel, "\u21BE", "\\restriction");
+defineSymbol(math, main, textord, "\u2018", "`");
+defineSymbol(math, main, textord, "$", "\\$");
+defineSymbol(symbols_text, main, textord, "$", "\\$");
+defineSymbol(symbols_text, main, textord, "$", "\\textdollar");
+defineSymbol(math, main, textord, "%", "\\%");
+defineSymbol(symbols_text, main, textord, "%", "\\%");
+defineSymbol(math, main, textord, "_", "\\_");
+defineSymbol(symbols_text, main, textord, "_", "\\_");
+defineSymbol(symbols_text, main, textord, "_", "\\textunderscore");
+defineSymbol(math, main, textord, "\u2220", "\\angle", true);
+defineSymbol(math, main, textord, "\u221E", "\\infty", true);
+defineSymbol(math, main, textord, "\u2032", "\\prime");
+defineSymbol(math, main, textord, "\u25B3", "\\triangle");
+defineSymbol(math, main, textord, "\u0393", "\\Gamma", true);
+defineSymbol(math, main, textord, "\u0394", "\\Delta", true);
+defineSymbol(math, main, textord, "\u0398", "\\Theta", true);
+defineSymbol(math, main, textord, "\u039B", "\\Lambda", true);
+defineSymbol(math, main, textord, "\u039E", "\\Xi", true);
+defineSymbol(math, main, textord, "\u03A0", "\\Pi", true);
+defineSymbol(math, main, textord, "\u03A3", "\\Sigma", true);
+defineSymbol(math, main, textord, "\u03A5", "\\Upsilon", true);
+defineSymbol(math, main, textord, "\u03A6", "\\Phi", true);
+defineSymbol(math, main, textord, "\u03A8", "\\Psi", true);
+defineSymbol(math, main, textord, "\u03A9", "\\Omega", true);
+defineSymbol(math, main, textord, "A", "\u0391");
+defineSymbol(math, main, textord, "B", "\u0392");
+defineSymbol(math, main, textord, "E", "\u0395");
+defineSymbol(math, main, textord, "Z", "\u0396");
+defineSymbol(math, main, textord, "H", "\u0397");
+defineSymbol(math, main, textord, "I", "\u0399");
+defineSymbol(math, main, textord, "K", "\u039A");
+defineSymbol(math, main, textord, "M", "\u039C");
+defineSymbol(math, main, textord, "N", "\u039D");
+defineSymbol(math, main, textord, "O", "\u039F");
+defineSymbol(math, main, textord, "P", "\u03A1");
+defineSymbol(math, main, textord, "T", "\u03A4");
+defineSymbol(math, main, textord, "X", "\u03A7");
+defineSymbol(math, main, textord, "\xAC", "\\neg", true);
+defineSymbol(math, main, textord, "\xAC", "\\lnot");
+defineSymbol(math, main, textord, "\u22A4", "\\top");
+defineSymbol(math, main, textord, "\u22A5", "\\bot");
+defineSymbol(math, main, textord, "\u2205", "\\emptyset");
+defineSymbol(math, ams, textord, "\u2205", "\\varnothing");
+defineSymbol(math, main, mathord, "\u03B1", "\\alpha", true);
+defineSymbol(math, main, mathord, "\u03B2", "\\beta", true);
+defineSymbol(math, main, mathord, "\u03B3", "\\gamma", true);
+defineSymbol(math, main, mathord, "\u03B4", "\\delta", true);
+defineSymbol(math, main, mathord, "\u03F5", "\\epsilon", true);
+defineSymbol(math, main, mathord, "\u03B6", "\\zeta", true);
+defineSymbol(math, main, mathord, "\u03B7", "\\eta", true);
+defineSymbol(math, main, mathord, "\u03B8", "\\theta", true);
+defineSymbol(math, main, mathord, "\u03B9", "\\iota", true);
+defineSymbol(math, main, mathord, "\u03BA", "\\kappa", true);
+defineSymbol(math, main, mathord, "\u03BB", "\\lambda", true);
+defineSymbol(math, main, mathord, "\u03BC", "\\mu", true);
+defineSymbol(math, main, mathord, "\u03BD", "\\nu", true);
+defineSymbol(math, main, mathord, "\u03BE", "\\xi", true);
+defineSymbol(math, main, mathord, "\u03BF", "\\omicron", true);
+defineSymbol(math, main, mathord, "\u03C0", "\\pi", true);
+defineSymbol(math, main, mathord, "\u03C1", "\\rho", true);
+defineSymbol(math, main, mathord, "\u03C3", "\\sigma", true);
+defineSymbol(math, main, mathord, "\u03C4", "\\tau", true);
+defineSymbol(math, main, mathord, "\u03C5", "\\upsilon", true);
+defineSymbol(math, main, mathord, "\u03D5", "\\phi", true);
+defineSymbol(math, main, mathord, "\u03C7", "\\chi", true);
+defineSymbol(math, main, mathord, "\u03C8", "\\psi", true);
+defineSymbol(math, main, mathord, "\u03C9", "\\omega", true);
+defineSymbol(math, main, mathord, "\u03B5", "\\varepsilon", true);
+defineSymbol(math, main, mathord, "\u03D1", "\\vartheta", true);
+defineSymbol(math, main, mathord, "\u03D6", "\\varpi", true);
+defineSymbol(math, main, mathord, "\u03F1", "\\varrho", true);
+defineSymbol(math, main, mathord, "\u03C2", "\\varsigma", true);
+defineSymbol(math, main, mathord, "\u03C6", "\\varphi", true);
+defineSymbol(math, main, bin, "\u2217", "*", true);
+defineSymbol(math, main, bin, "+", "+");
+defineSymbol(math, main, bin, "\u2212", "-", true);
+defineSymbol(math, main, bin, "\u22C5", "\\cdot", true);
+defineSymbol(math, main, bin, "\u2218", "\\circ", true);
+defineSymbol(math, main, bin, "\xF7", "\\div", true);
+defineSymbol(math, main, bin, "\xB1", "\\pm", true);
+defineSymbol(math, main, bin, "\xD7", "\\times", true);
+defineSymbol(math, main, bin, "\u2229", "\\cap", true);
+defineSymbol(math, main, bin, "\u222A", "\\cup", true);
+defineSymbol(math, main, bin, "\u2216", "\\setminus", true);
+defineSymbol(math, main, bin, "\u2227", "\\land");
+defineSymbol(math, main, bin, "\u2228", "\\lor");
+defineSymbol(math, main, bin, "\u2227", "\\wedge", true);
+defineSymbol(math, main, bin, "\u2228", "\\vee", true);
+defineSymbol(math, main, textord, "\u221A", "\\surd");
+defineSymbol(math, main, symbols_open, "\u27E8", "\\langle", true);
+defineSymbol(math, main, symbols_open, "\u2223", "\\lvert");
+defineSymbol(math, main, symbols_open, "\u2225", "\\lVert");
+defineSymbol(math, main, symbols_close, "?", "?");
+defineSymbol(math, main, symbols_close, "!", "!");
+defineSymbol(math, main, symbols_close, "\u27E9", "\\rangle", true);
+defineSymbol(math, main, symbols_close, "\u2223", "\\rvert");
+defineSymbol(math, main, symbols_close, "\u2225", "\\rVert");
+defineSymbol(math, main, rel, "=", "=");
+defineSymbol(math, main, rel, ":", ":");
+defineSymbol(math, main, rel, "\u2248", "\\approx", true);
+defineSymbol(math, main, rel, "\u2245", "\\cong", true);
+defineSymbol(math, main, rel, "\u2265", "\\ge");
+defineSymbol(math, main, rel, "\u2265", "\\geq", true);
+defineSymbol(math, main, rel, "\u2190", "\\gets");
+defineSymbol(math, main, rel, ">", "\\gt", true);
+defineSymbol(math, main, rel, "\u2208", "\\in", true);
+defineSymbol(math, main, rel, "\uE020", "\\@not");
+defineSymbol(math, main, rel, "\u2282", "\\subset", true);
+defineSymbol(math, main, rel, "\u2283", "\\supset", true);
+defineSymbol(math, main, rel, "\u2286", "\\subseteq", true);
+defineSymbol(math, main, rel, "\u2287", "\\supseteq", true);
+defineSymbol(math, ams, rel, "\u2288", "\\nsubseteq", true);
+defineSymbol(math, ams, rel, "\u2289", "\\nsupseteq", true);
+defineSymbol(math, main, rel, "\u22A8", "\\models");
+defineSymbol(math, main, rel, "\u2190", "\\leftarrow", true);
+defineSymbol(math, main, rel, "\u2264", "\\le");
+defineSymbol(math, main, rel, "\u2264", "\\leq", true);
+defineSymbol(math, main, rel, "<", "\\lt", true);
+defineSymbol(math, main, rel, "\u2192", "\\rightarrow", true);
+defineSymbol(math, main, rel, "\u2192", "\\to");
+defineSymbol(math, ams, rel, "\u2271", "\\ngeq", true);
+defineSymbol(math, ams, rel, "\u2270", "\\nleq", true);
+defineSymbol(math, main, spacing, "\xA0", "\\ ");
+defineSymbol(math, main, spacing, "\xA0", "\\space"); // Ref: LaTeX Source 2e: \DeclareRobustCommand{\nobreakspace}{%
+
+defineSymbol(math, main, spacing, "\xA0", "\\nobreakspace");
+defineSymbol(symbols_text, main, spacing, "\xA0", "\\ ");
+defineSymbol(symbols_text, main, spacing, "\xA0", " ");
+defineSymbol(symbols_text, main, spacing, "\xA0", "\\space");
+defineSymbol(symbols_text, main, spacing, "\xA0", "\\nobreakspace");
+defineSymbol(math, main, spacing, null, "\\nobreak");
+defineSymbol(math, main, spacing, null, "\\allowbreak");
+defineSymbol(math, main, punct, ",", ",");
+defineSymbol(math, main, punct, ";", ";");
+defineSymbol(math, ams, bin, "\u22BC", "\\barwedge", true);
+defineSymbol(math, ams, bin, "\u22BB", "\\veebar", true);
+defineSymbol(math, main, bin, "\u2299", "\\odot", true);
+defineSymbol(math, main, bin, "\u2295", "\\oplus", true);
+defineSymbol(math, main, bin, "\u2297", "\\otimes", true);
+defineSymbol(math, main, textord, "\u2202", "\\partial", true);
+defineSymbol(math, main, bin, "\u2298", "\\oslash", true);
+defineSymbol(math, ams, bin, "\u229A", "\\circledcirc", true);
+defineSymbol(math, ams, bin, "\u22A1", "\\boxdot", true);
+defineSymbol(math, main, bin, "\u25B3", "\\bigtriangleup");
+defineSymbol(math, main, bin, "\u25BD", "\\bigtriangledown");
+defineSymbol(math, main, bin, "\u2020", "\\dagger");
+defineSymbol(math, main, bin, "\u22C4", "\\diamond");
+defineSymbol(math, main, bin, "\u22C6", "\\star");
+defineSymbol(math, main, bin, "\u25C3", "\\triangleleft");
+defineSymbol(math, main, bin, "\u25B9", "\\triangleright");
+defineSymbol(math, main, symbols_open, "{", "\\{");
+defineSymbol(symbols_text, main, textord, "{", "\\{");
+defineSymbol(symbols_text, main, textord, "{", "\\textbraceleft");
+defineSymbol(math, main, symbols_close, "}", "\\}");
+defineSymbol(symbols_text, main, textord, "}", "\\}");
+defineSymbol(symbols_text, main, textord, "}", "\\textbraceright");
+defineSymbol(math, main, symbols_open, "{", "\\lbrace");
+defineSymbol(math, main, symbols_close, "}", "\\rbrace");
+defineSymbol(math, main, symbols_open, "[", "\\lbrack", true);
+defineSymbol(symbols_text, main, textord, "[", "\\lbrack", true);
+defineSymbol(math, main, symbols_close, "]", "\\rbrack", true);
+defineSymbol(symbols_text, main, textord, "]", "\\rbrack", true);
+defineSymbol(math, main, symbols_open, "(", "\\lparen", true);
+defineSymbol(math, main, symbols_close, ")", "\\rparen", true);
+defineSymbol(symbols_text, main, textord, "<", "\\textless", true); // in T1 fontenc
+
+defineSymbol(symbols_text, main, textord, ">", "\\textgreater", true); // in T1 fontenc
+
+defineSymbol(math, main, symbols_open, "\u230A", "\\lfloor", true);
+defineSymbol(math, main, symbols_close, "\u230B", "\\rfloor", true);
+defineSymbol(math, main, symbols_open, "\u2308", "\\lceil", true);
+defineSymbol(math, main, symbols_close, "\u2309", "\\rceil", true);
+defineSymbol(math, main, textord, "\\", "\\backslash");
+defineSymbol(math, main, textord, "\u2223", "|");
+defineSymbol(math, main, textord, "\u2223", "\\vert");
+defineSymbol(symbols_text, main, textord, "|", "\\textbar", true); // in T1 fontenc
+
+defineSymbol(math, main, textord, "\u2225", "\\|");
+defineSymbol(math, main, textord, "\u2225", "\\Vert");
+defineSymbol(symbols_text, main, textord, "\u2225", "\\textbardbl");
+defineSymbol(symbols_text, main, textord, "~", "\\textasciitilde");
+defineSymbol(symbols_text, main, textord, "\\", "\\textbackslash");
+defineSymbol(symbols_text, main, textord, "^", "\\textasciicircum");
+defineSymbol(math, main, rel, "\u2191", "\\uparrow", true);
+defineSymbol(math, main, rel, "\u21D1", "\\Uparrow", true);
+defineSymbol(math, main, rel, "\u2193", "\\downarrow", true);
+defineSymbol(math, main, rel, "\u21D3", "\\Downarrow", true);
+defineSymbol(math, main, rel, "\u2195", "\\updownarrow", true);
+defineSymbol(math, main, rel, "\u21D5", "\\Updownarrow", true);
+defineSymbol(math, main, op, "\u2210", "\\coprod");
+defineSymbol(math, main, op, "\u22C1", "\\bigvee");
+defineSymbol(math, main, op, "\u22C0", "\\bigwedge");
+defineSymbol(math, main, op, "\u2A04", "\\biguplus");
+defineSymbol(math, main, op, "\u22C2", "\\bigcap");
+defineSymbol(math, main, op, "\u22C3", "\\bigcup");
+defineSymbol(math, main, op, "\u222B", "\\int");
+defineSymbol(math, main, op, "\u222B", "\\intop");
+defineSymbol(math, main, op, "\u222C", "\\iint");
+defineSymbol(math, main, op, "\u222D", "\\iiint");
+defineSymbol(math, main, op, "\u220F", "\\prod");
+defineSymbol(math, main, op, "\u2211", "\\sum");
+defineSymbol(math, main, op, "\u2A02", "\\bigotimes");
+defineSymbol(math, main, op, "\u2A01", "\\bigoplus");
+defineSymbol(math, main, op, "\u2A00", "\\bigodot");
+defineSymbol(math, main, op, "\u222E", "\\oint");
+defineSymbol(math, main, op, "\u222F", "\\oiint");
+defineSymbol(math, main, op, "\u2230", "\\oiiint");
+defineSymbol(math, main, op, "\u2A06", "\\bigsqcup");
+defineSymbol(math, main, op, "\u222B", "\\smallint");
+defineSymbol(symbols_text, main, inner, "\u2026", "\\textellipsis");
+defineSymbol(math, main, inner, "\u2026", "\\mathellipsis");
+defineSymbol(symbols_text, main, inner, "\u2026", "\\ldots", true);
+defineSymbol(math, main, inner, "\u2026", "\\ldots", true);
+defineSymbol(math, main, inner, "\u22EF", "\\@cdots", true);
+defineSymbol(math, main, inner, "\u22F1", "\\ddots", true);
+defineSymbol(math, main, textord, "\u22EE", "\\varvdots"); // \vdots is a macro
+
+defineSymbol(math, main, accent, "\u02CA", "\\acute");
+defineSymbol(math, main, accent, "\u02CB", "\\grave");
+defineSymbol(math, main, accent, "\xA8", "\\ddot");
+defineSymbol(math, main, accent, "~", "\\tilde");
+defineSymbol(math, main, accent, "\u02C9", "\\bar");
+defineSymbol(math, main, accent, "\u02D8", "\\breve");
+defineSymbol(math, main, accent, "\u02C7", "\\check");
+defineSymbol(math, main, accent, "^", "\\hat");
+defineSymbol(math, main, accent, "\u20D7", "\\vec");
+defineSymbol(math, main, accent, "\u02D9", "\\dot");
+defineSymbol(math, main, accent, "\u02DA", "\\mathring"); // \imath and \jmath should be invariant to \mathrm, \mathbf, etc., so use PUA
+
+defineSymbol(math, main, mathord, "\uE131", "\\@imath");
+defineSymbol(math, main, mathord, "\uE237", "\\@jmath");
+defineSymbol(math, main, textord, "\u0131", "\u0131");
+defineSymbol(math, main, textord, "\u0237", "\u0237");
+defineSymbol(symbols_text, main, textord, "\u0131", "\\i", true);
+defineSymbol(symbols_text, main, textord, "\u0237", "\\j", true);
+defineSymbol(symbols_text, main, textord, "\xDF", "\\ss", true);
+defineSymbol(symbols_text, main, textord, "\xE6", "\\ae", true);
+defineSymbol(symbols_text, main, textord, "\u0153", "\\oe", true);
+defineSymbol(symbols_text, main, textord, "\xF8", "\\o", true);
+defineSymbol(symbols_text, main, textord, "\xC6", "\\AE", true);
+defineSymbol(symbols_text, main, textord, "\u0152", "\\OE", true);
+defineSymbol(symbols_text, main, textord, "\xD8", "\\O", true);
+defineSymbol(symbols_text, main, accent, "\u02CA", "\\'"); // acute
+
+defineSymbol(symbols_text, main, accent, "\u02CB", "\\`"); // grave
+
+defineSymbol(symbols_text, main, accent, "\u02C6", "\\^"); // circumflex
+
+defineSymbol(symbols_text, main, accent, "\u02DC", "\\~"); // tilde
+
+defineSymbol(symbols_text, main, accent, "\u02C9", "\\="); // macron
+
+defineSymbol(symbols_text, main, accent, "\u02D8", "\\u"); // breve
+
+defineSymbol(symbols_text, main, accent, "\u02D9", "\\."); // dot above
+
+defineSymbol(symbols_text, main, accent, "\xB8", "\\c"); // cedilla
+
+defineSymbol(symbols_text, main, accent, "\u02DA", "\\r"); // ring above
+
+defineSymbol(symbols_text, main, accent, "\u02C7", "\\v"); // caron
+
+defineSymbol(symbols_text, main, accent, "\xA8", '\\"'); // diaresis
+
+defineSymbol(symbols_text, main, accent, "\u02DD", "\\H"); // double acute
+
+defineSymbol(symbols_text, main, accent, "\u25EF", "\\textcircled"); // \bigcirc glyph
+// These ligatures are detected and created in Parser.js's `formLigatures`.
+
+var ligatures = {
+  "--": true,
+  "---": true,
+  "``": true,
+  "''": true
+};
+defineSymbol(symbols_text, main, textord, "\u2013", "--", true);
+defineSymbol(symbols_text, main, textord, "\u2013", "\\textendash");
+defineSymbol(symbols_text, main, textord, "\u2014", "---", true);
+defineSymbol(symbols_text, main, textord, "\u2014", "\\textemdash");
+defineSymbol(symbols_text, main, textord, "\u2018", "`", true);
+defineSymbol(symbols_text, main, textord, "\u2018", "\\textquoteleft");
+defineSymbol(symbols_text, main, textord, "\u2019", "'", true);
+defineSymbol(symbols_text, main, textord, "\u2019", "\\textquoteright");
+defineSymbol(symbols_text, main, textord, "\u201C", "``", true);
+defineSymbol(symbols_text, main, textord, "\u201C", "\\textquotedblleft");
+defineSymbol(symbols_text, main, textord, "\u201D", "''", true);
+defineSymbol(symbols_text, main, textord, "\u201D", "\\textquotedblright"); //  \degree from gensymb package
+
+defineSymbol(math, main, textord, "\xB0", "\\degree", true);
+defineSymbol(symbols_text, main, textord, "\xB0", "\\degree"); // \textdegree from inputenc package
+
+defineSymbol(symbols_text, main, textord, "\xB0", "\\textdegree", true); // TODO: In LaTeX, \pounds can generate a different character in text and math
+// mode, but among our fonts, only Main-Regular defines this character "163".
+
+defineSymbol(math, main, textord, "\xA3", "\\pounds");
+defineSymbol(math, main, textord, "\xA3", "\\mathsterling", true);
+defineSymbol(symbols_text, main, textord, "\xA3", "\\pounds");
+defineSymbol(symbols_text, main, textord, "\xA3", "\\textsterling", true);
+defineSymbol(math, ams, textord, "\u2720", "\\maltese");
+defineSymbol(symbols_text, ams, textord, "\u2720", "\\maltese"); // There are lots of symbols which are the same, so we add them in afterwards.
+// All of these are textords in math mode
+
+var mathTextSymbols = "0123456789/@.\"";
+
+for (var i = 0; i < mathTextSymbols.length; i++) {
+  var ch = mathTextSymbols.charAt(i);
+  defineSymbol(math, main, textord, ch, ch);
+} // All of these are textords in text mode
+
+
+var textSymbols = "0123456789!@*()-=+\";:?/.,";
+
+for (var _i = 0; _i < textSymbols.length; _i++) {
+  var _ch = textSymbols.charAt(_i);
+
+  defineSymbol(symbols_text, main, textord, _ch, _ch);
+} // All of these are textords in text mode, and mathords in math mode
+
+
+var letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+for (var _i2 = 0; _i2 < letters.length; _i2++) {
+  var _ch2 = letters.charAt(_i2);
+
+  defineSymbol(math, main, mathord, _ch2, _ch2);
+  defineSymbol(symbols_text, main, textord, _ch2, _ch2);
+} // Blackboard bold and script letters in Unicode range
+
+
+defineSymbol(math, ams, textord, "C", "\u2102"); // blackboard bold
+
+defineSymbol(symbols_text, ams, textord, "C", "\u2102");
+defineSymbol(math, ams, textord, "H", "\u210D");
+defineSymbol(symbols_text, ams, textord, "H", "\u210D");
+defineSymbol(math, ams, textord, "N", "\u2115");
+defineSymbol(symbols_text, ams, textord, "N", "\u2115");
+defineSymbol(math, ams, textord, "P", "\u2119");
+defineSymbol(symbols_text, ams, textord, "P", "\u2119");
+defineSymbol(math, ams, textord, "Q", "\u211A");
+defineSymbol(symbols_text, ams, textord, "Q", "\u211A");
+defineSymbol(math, ams, textord, "R", "\u211D");
+defineSymbol(symbols_text, ams, textord, "R", "\u211D");
+defineSymbol(math, ams, textord, "Z", "\u2124");
+defineSymbol(symbols_text, ams, textord, "Z", "\u2124");
+defineSymbol(math, main, mathord, "h", "\u210E"); // italic h, Planck constant
+
+defineSymbol(symbols_text, main, mathord, "h", "\u210E"); // The next loop loads wide (surrogate pair) characters.
+// We support some letters in the Unicode range U+1D400 to U+1D7FF,
+// Mathematical Alphanumeric Symbols.
+// Some editors do not deal well with wide characters. So don't write the
+// string into this file. Instead, create the string from the surrogate pair.
+
+var wideChar = "";
+
+for (var _i3 = 0; _i3 < letters.length; _i3++) {
+  var _ch3 = letters.charAt(_i3); // The hex numbers in the next line are a surrogate pair.
+  // 0xD835 is the high surrogate for all letters in the range we support.
+  // 0xDC00 is the low surrogate for bold A.
+
+
+  wideChar = String.fromCharCode(0xD835, 0xDC00 + _i3); // A-Z a-z bold
+
+  defineSymbol(math, main, mathord, _ch3, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDC34 + _i3); // A-Z a-z italic
+
+  defineSymbol(math, main, mathord, _ch3, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDC68 + _i3); // A-Z a-z bold italic
+
+  defineSymbol(math, main, mathord, _ch3, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDD04 + _i3); // A-Z a-z Fractur
+
+  defineSymbol(math, main, mathord, _ch3, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDD6C + _i3); // A-Z a-z bold Fractur
+
+  defineSymbol(math, main, mathord, _ch3, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDDA0 + _i3); // A-Z a-z sans-serif
+
+  defineSymbol(math, main, mathord, _ch3, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDDD4 + _i3); // A-Z a-z sans bold
+
+  defineSymbol(math, main, mathord, _ch3, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDE08 + _i3); // A-Z a-z sans italic
+
+  defineSymbol(math, main, mathord, _ch3, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDE70 + _i3); // A-Z a-z monospace
+
+  defineSymbol(math, main, mathord, _ch3, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+
+  if (_i3 < 26) {
+    // KaTeX fonts have only capital letters for blackboard bold and script.
+    // See exception for k below.
+    wideChar = String.fromCharCode(0xD835, 0xDD38 + _i3); // A-Z double struck
+
+    defineSymbol(math, main, mathord, _ch3, wideChar);
+    defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+    wideChar = String.fromCharCode(0xD835, 0xDC9C + _i3); // A-Z script
+
+    defineSymbol(math, main, mathord, _ch3, wideChar);
+    defineSymbol(symbols_text, main, textord, _ch3, wideChar);
+  } // TODO: Add bold script when it is supported by a KaTeX font.
+
+} // "k" is the only double struck lower case letter in the KaTeX fonts.
+
+
+wideChar = String.fromCharCode(0xD835, 0xDD5C); // k double struck
+
+defineSymbol(math, main, mathord, "k", wideChar);
+defineSymbol(symbols_text, main, textord, "k", wideChar); // Next, some wide character numerals
+
+for (var _i4 = 0; _i4 < 10; _i4++) {
+  var _ch4 = _i4.toString();
+
+  wideChar = String.fromCharCode(0xD835, 0xDFCE + _i4); // 0-9 bold
+
+  defineSymbol(math, main, mathord, _ch4, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch4, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDFE2 + _i4); // 0-9 sans serif
+
+  defineSymbol(math, main, mathord, _ch4, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch4, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDFEC + _i4); // 0-9 bold sans
+
+  defineSymbol(math, main, mathord, _ch4, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch4, wideChar);
+  wideChar = String.fromCharCode(0xD835, 0xDFF6 + _i4); // 0-9 monospace
+
+  defineSymbol(math, main, mathord, _ch4, wideChar);
+  defineSymbol(symbols_text, main, textord, _ch4, wideChar);
+} // We add these Latin-1 letters as symbols for backwards-compatibility,
+// but they are not actually in the font, nor are they supported by the
+// Unicode accent mechanism, so they fall back to Times font and look ugly.
+// TODO(edemaine): Fix this.
+
+
+var extraLatin = "\xD0\xDE\xFE";
+
+for (var _i5 = 0; _i5 < extraLatin.length; _i5++) {
+  var _ch5 = extraLatin.charAt(_i5);
+
+  defineSymbol(math, main, mathord, _ch5, _ch5);
+  defineSymbol(symbols_text, main, textord, _ch5, _ch5);
+}
+;// CONCATENATED MODULE: ./src/wide-character.js
+/**
+ * This file provides support for Unicode range U+1D400 to U+1D7FF,
+ * Mathematical Alphanumeric Symbols.
+ *
+ * Function wideCharacterFont takes a wide character as input and returns
+ * the font information necessary to render it properly.
+ */
+
+/**
+ * Data below is from https://www.unicode.org/charts/PDF/U1D400.pdf
+ * That document sorts characters into groups by font type, say bold or italic.
+ *
+ * In the arrays below, each subarray consists three elements:
+ *      * The CSS class of that group when in math mode.
+ *      * The CSS class of that group when in text mode.
+ *      * The font name, so that KaTeX can get font metrics.
+ */
+
+var wideLatinLetterData = [["mathbf", "textbf", "Main-Bold"], // A-Z bold upright
+["mathbf", "textbf", "Main-Bold"], // a-z bold upright
+["mathnormal", "textit", "Math-Italic"], // A-Z italic
+["mathnormal", "textit", "Math-Italic"], // a-z italic
+["boldsymbol", "boldsymbol", "Main-BoldItalic"], // A-Z bold italic
+["boldsymbol", "boldsymbol", "Main-BoldItalic"], // a-z bold italic
+// Map fancy A-Z letters to script, not calligraphic.
+// This aligns with unicode-math and math fonts (except Cambria Math).
+["mathscr", "textscr", "Script-Regular"], // A-Z script
+["", "", ""], // a-z script.  No font
+["", "", ""], // A-Z bold script. No font
+["", "", ""], // a-z bold script. No font
+["mathfrak", "textfrak", "Fraktur-Regular"], // A-Z Fraktur
+["mathfrak", "textfrak", "Fraktur-Regular"], // a-z Fraktur
+["mathbb", "textbb", "AMS-Regular"], // A-Z double-struck
+["mathbb", "textbb", "AMS-Regular"], // k double-struck
+// Note that we are using a bold font, but font metrics for regular Fraktur.
+["mathboldfrak", "textboldfrak", "Fraktur-Regular"], // A-Z bold Fraktur
+["mathboldfrak", "textboldfrak", "Fraktur-Regular"], // a-z bold Fraktur
+["mathsf", "textsf", "SansSerif-Regular"], // A-Z sans-serif
+["mathsf", "textsf", "SansSerif-Regular"], // a-z sans-serif
+["mathboldsf", "textboldsf", "SansSerif-Bold"], // A-Z bold sans-serif
+["mathboldsf", "textboldsf", "SansSerif-Bold"], // a-z bold sans-serif
+["mathitsf", "textitsf", "SansSerif-Italic"], // A-Z italic sans-serif
+["mathitsf", "textitsf", "SansSerif-Italic"], // a-z italic sans-serif
+["", "", ""], // A-Z bold italic sans. No font
+["", "", ""], // a-z bold italic sans. No font
+["mathtt", "texttt", "Typewriter-Regular"], // A-Z monospace
+["mathtt", "texttt", "Typewriter-Regular"] // a-z monospace
+];
+var wideNumeralData = [["mathbf", "textbf", "Main-Bold"], // 0-9 bold
+["", "", ""], // 0-9 double-struck. No KaTeX font.
+["mathsf", "textsf", "SansSerif-Regular"], // 0-9 sans-serif
+["mathboldsf", "textboldsf", "SansSerif-Bold"], // 0-9 bold sans-serif
+["mathtt", "texttt", "Typewriter-Regular"] // 0-9 monospace
+];
+var wideCharacterFont = function wideCharacterFont(wideChar, mode) {
+  // IE doesn't support codePointAt(). So work with the surrogate pair.
+  var H = wideChar.charCodeAt(0); // high surrogate
+
+  var L = wideChar.charCodeAt(1); // low surrogate
+
+  var codePoint = (H - 0xD800) * 0x400 + (L - 0xDC00) + 0x10000;
+  var j = mode === "math" ? 0 : 1; // column index for CSS class.
+
+  if (0x1D400 <= codePoint && codePoint < 0x1D6A4) {
+    // wideLatinLetterData contains exactly 26 chars on each row.
+    // So we can calculate the relevant row. No traverse necessary.
+    var i = Math.floor((codePoint - 0x1D400) / 26);
+    return [wideLatinLetterData[i][2], wideLatinLetterData[i][j]];
+  } else if (0x1D7CE <= codePoint && codePoint <= 0x1D7FF) {
+    // Numerals, ten per row.
+    var _i = Math.floor((codePoint - 0x1D7CE) / 10);
+
+    return [wideNumeralData[_i][2], wideNumeralData[_i][j]];
+  } else if (codePoint === 0x1D6A5 || codePoint === 0x1D6A6) {
+    // dotless i or j
+    return [wideLatinLetterData[0][2], wideLatinLetterData[0][j]];
+  } else if (0x1D6A6 < codePoint && codePoint < 0x1D7CE) {
+    // Greek letters. Not supported, yet.
+    return ["", ""];
+  } else {
+    // We don't support any wide characters outside 1D400–1D7FF.
+    throw new src_ParseError("Unsupported character: " + wideChar);
+  }
+};
+;// CONCATENATED MODULE: ./src/buildCommon.js
+/* eslint no-console:0 */
+
+/**
+ * This module contains general functions that can be used for building
+ * different kinds of domTree nodes in a consistent manner.
+ */
+
+
+
+
+
+
+
+/**
+ * Looks up the given symbol in fontMetrics, after applying any symbol
+ * replacements defined in symbol.js
+ */
+var lookupSymbol = function lookupSymbol(value, // TODO(#963): Use a union type for this.
+fontName, mode) {
+  // Replace the value with its replaced value from symbol.js
+  if (src_symbols[mode][value] && src_symbols[mode][value].replace) {
+    value = src_symbols[mode][value].replace;
+  }
+
+  return {
+    value: value,
+    metrics: getCharacterMetrics(value, fontName, mode)
+  };
+};
+/**
+ * Makes a symbolNode after translation via the list of symbols in symbols.js.
+ * Correctly pulls out metrics for the character, and optionally takes a list of
+ * classes to be attached to the node.
+ *
+ * TODO: make argument order closer to makeSpan
+ * TODO: add a separate argument for math class (e.g. `mop`, `mbin`), which
+ * should if present come first in `classes`.
+ * TODO(#953): Make `options` mandatory and always pass it in.
+ */
+
+
+var makeSymbol = function makeSymbol(value, fontName, mode, options, classes) {
+  var lookup = lookupSymbol(value, fontName, mode);
+  var metrics = lookup.metrics;
+  value = lookup.value;
+  var symbolNode;
+
+  if (metrics) {
+    var italic = metrics.italic;
+
+    if (mode === "text" || options && options.font === "mathit") {
+      italic = 0;
+    }
+
+    symbolNode = new SymbolNode(value, metrics.height, metrics.depth, italic, metrics.skew, metrics.width, classes);
+  } else {
+    // TODO(emily): Figure out a good way to only print this in development
+    typeof console !== "undefined" && console.warn("No character metrics " + ("for '" + value + "' in style '" + fontName + "' and mode '" + mode + "'"));
+    symbolNode = new SymbolNode(value, 0, 0, 0, 0, 0, classes);
+  }
+
+  if (options) {
+    symbolNode.maxFontSize = options.sizeMultiplier;
+
+    if (options.style.isTight()) {
+      symbolNode.classes.push("mtight");
+    }
+
+    var color = options.getColor();
+
+    if (color) {
+      symbolNode.style.color = color;
+    }
+  }
+
+  return symbolNode;
+};
+/**
+ * Makes a symbol in Main-Regular or AMS-Regular.
+ * Used for rel, bin, open, close, inner, and punct.
+ */
+
+
+var mathsym = function mathsym(value, mode, options, classes) {
+  if (classes === void 0) {
+    classes = [];
+  }
+
+  // Decide what font to render the symbol in by its entry in the symbols
+  // table.
+  // Have a special case for when the value = \ because the \ is used as a
+  // textord in unsupported command errors but cannot be parsed as a regular
+  // text ordinal and is therefore not present as a symbol in the symbols
+  // table for text, as well as a special case for boldsymbol because it
+  // can be used for bold + and -
+  if (options.font === "boldsymbol" && lookupSymbol(value, "Main-Bold", mode).metrics) {
+    return makeSymbol(value, "Main-Bold", mode, options, classes.concat(["mathbf"]));
+  } else if (value === "\\" || src_symbols[mode][value].font === "main") {
+    return makeSymbol(value, "Main-Regular", mode, options, classes);
+  } else {
+    return makeSymbol(value, "AMS-Regular", mode, options, classes.concat(["amsrm"]));
+  }
+};
+/**
+ * Determines which of the two font names (Main-Bold and Math-BoldItalic) and
+ * corresponding style tags (mathbf or boldsymbol) to use for font "boldsymbol",
+ * depending on the symbol.  Use this function instead of fontMap for font
+ * "boldsymbol".
+ */
+
+
+var boldsymbol = function boldsymbol(value, mode, options, classes, type) {
+  if (type !== "textord" && lookupSymbol(value, "Math-BoldItalic", mode).metrics) {
+    return {
+      fontName: "Math-BoldItalic",
+      fontClass: "boldsymbol"
+    };
+  } else {
+    // Some glyphs do not exist in Math-BoldItalic so we need to use
+    // Main-Bold instead.
+    return {
+      fontName: "Main-Bold",
+      fontClass: "mathbf"
+    };
+  }
+};
+/**
+ * Makes either a mathord or textord in the correct font and color.
+ */
+
+
+var makeOrd = function makeOrd(group, options, type) {
+  var mode = group.mode;
+  var text = group.text;
+  var classes = ["mord"]; // Math mode or Old font (i.e. \rm)
+
+  var isFont = mode === "math" || mode === "text" && options.font;
+  var fontOrFamily = isFont ? options.font : options.fontFamily;
+  var wideFontName = "";
+  var wideFontClass = "";
+
+  if (text.charCodeAt(0) === 0xD835) {
+    var _wideCharacterFont = wideCharacterFont(text, mode);
+
+    wideFontName = _wideCharacterFont[0];
+    wideFontClass = _wideCharacterFont[1];
+  }
+
+  if (wideFontName.length > 0) {
+    // surrogate pairs get special treatment
+    return makeSymbol(text, wideFontName, mode, options, classes.concat(wideFontClass));
+  } else if (fontOrFamily) {
+    var fontName;
+    var fontClasses;
+
+    if (fontOrFamily === "boldsymbol") {
+      var fontData = boldsymbol(text, mode, options, classes, type);
+      fontName = fontData.fontName;
+      fontClasses = [fontData.fontClass];
+    } else if (isFont) {
+      fontName = fontMap[fontOrFamily].fontName;
+      fontClasses = [fontOrFamily];
+    } else {
+      fontName = retrieveTextFontName(fontOrFamily, options.fontWeight, options.fontShape);
+      fontClasses = [fontOrFamily, options.fontWeight, options.fontShape];
+    }
+
+    if (lookupSymbol(text, fontName, mode).metrics) {
+      return makeSymbol(text, fontName, mode, options, classes.concat(fontClasses));
+    } else if (ligatures.hasOwnProperty(text) && fontName.slice(0, 10) === "Typewriter") {
+      // Deconstruct ligatures in monospace fonts (\texttt, \tt).
+      var parts = [];
+
+      for (var i = 0; i < text.length; i++) {
+        parts.push(makeSymbol(text[i], fontName, mode, options, classes.concat(fontClasses)));
+      }
+
+      return makeFragment(parts);
+    }
+  } // Makes a symbol in the default font for mathords and textords.
+
+
+  if (type === "mathord") {
+    return makeSymbol(text, "Math-Italic", mode, options, classes.concat(["mathnormal"]));
+  } else if (type === "textord") {
+    var font = src_symbols[mode][text] && src_symbols[mode][text].font;
+
+    if (font === "ams") {
+      var _fontName = retrieveTextFontName("amsrm", options.fontWeight, options.fontShape);
+
+      return makeSymbol(text, _fontName, mode, options, classes.concat("amsrm", options.fontWeight, options.fontShape));
+    } else if (font === "main" || !font) {
+      var _fontName2 = retrieveTextFontName("textrm", options.fontWeight, options.fontShape);
+
+      return makeSymbol(text, _fontName2, mode, options, classes.concat(options.fontWeight, options.fontShape));
+    } else {
+      // fonts added by plugins
+      var _fontName3 = retrieveTextFontName(font, options.fontWeight, options.fontShape); // We add font name as a css class
+
+
+      return makeSymbol(text, _fontName3, mode, options, classes.concat(_fontName3, options.fontWeight, options.fontShape));
+    }
+  } else {
+    throw new Error("unexpected type: " + type + " in makeOrd");
+  }
+};
+/**
+ * Returns true if subsequent symbolNodes have the same classes, skew, maxFont,
+ * and styles.
+ */
+
+
+var canCombine = function canCombine(prev, next) {
+  if (createClass(prev.classes) !== createClass(next.classes) || prev.skew !== next.skew || prev.maxFontSize !== next.maxFontSize) {
+    return false;
+  } // If prev and next both are just "mbin"s or "mord"s we don't combine them
+  // so that the proper spacing can be preserved.
+
+
+  if (prev.classes.length === 1) {
+    var cls = prev.classes[0];
+
+    if (cls === "mbin" || cls === "mord") {
+      return false;
+    }
+  }
+
+  for (var style in prev.style) {
+    if (prev.style.hasOwnProperty(style) && prev.style[style] !== next.style[style]) {
+      return false;
+    }
+  }
+
+  for (var _style in next.style) {
+    if (next.style.hasOwnProperty(_style) && prev.style[_style] !== next.style[_style]) {
+      return false;
+    }
+  }
+
+  return true;
+};
+/**
+ * Combine consecutive domTree.symbolNodes into a single symbolNode.
+ * Note: this function mutates the argument.
+ */
+
+
+var tryCombineChars = function tryCombineChars(chars) {
+  for (var i = 0; i < chars.length - 1; i++) {
+    var prev = chars[i];
+    var next = chars[i + 1];
+
+    if (prev instanceof SymbolNode && next instanceof SymbolNode && canCombine(prev, next)) {
+      prev.text += next.text;
+      prev.height = Math.max(prev.height, next.height);
+      prev.depth = Math.max(prev.depth, next.depth); // Use the last character's italic correction since we use
+      // it to add padding to the right of the span created from
+      // the combined characters.
+
+      prev.italic = next.italic;
+      chars.splice(i + 1, 1);
+      i--;
+    }
+  }
+
+  return chars;
+};
+/**
+ * Calculate the height, depth, and maxFontSize of an element based on its
+ * children.
+ */
+
+
+var sizeElementFromChildren = function sizeElementFromChildren(elem) {
+  var height = 0;
+  var depth = 0;
+  var maxFontSize = 0;
+
+  for (var i = 0; i < elem.children.length; i++) {
+    var child = elem.children[i];
+
+    if (child.height > height) {
+      height = child.height;
+    }
+
+    if (child.depth > depth) {
+      depth = child.depth;
+    }
+
+    if (child.maxFontSize > maxFontSize) {
+      maxFontSize = child.maxFontSize;
+    }
+  }
+
+  elem.height = height;
+  elem.depth = depth;
+  elem.maxFontSize = maxFontSize;
+};
+/**
+ * Makes a span with the given list of classes, list of children, and options.
+ *
+ * TODO(#953): Ensure that `options` is always provided (currently some call
+ * sites don't pass it) and make the type below mandatory.
+ * TODO: add a separate argument for math class (e.g. `mop`, `mbin`), which
+ * should if present come first in `classes`.
+ */
+
+
+var makeSpan = function makeSpan(classes, children, options, style) {
+  var span = new Span(classes, children, options, style);
+  sizeElementFromChildren(span);
+  return span;
+}; // SVG one is simpler -- doesn't require height, depth, max-font setting.
+// This is also a separate method for typesafety.
+
+
+var makeSvgSpan = function makeSvgSpan(classes, children, options, style) {
+  return new Span(classes, children, options, style);
+};
+
+var makeLineSpan = function makeLineSpan(className, options, thickness) {
+  var line = makeSpan([className], [], options);
+  line.height = Math.max(thickness || options.fontMetrics().defaultRuleThickness, options.minRuleThickness);
+  line.style.borderBottomWidth = makeEm(line.height);
+  line.maxFontSize = 1.0;
+  return line;
+};
+/**
+ * Makes an anchor with the given href, list of classes, list of children,
+ * and options.
+ */
+
+
+var makeAnchor = function makeAnchor(href, classes, children, options) {
+  var anchor = new Anchor(href, classes, children, options);
+  sizeElementFromChildren(anchor);
+  return anchor;
+};
+/**
+ * Makes a document fragment with the given list of children.
+ */
+
+
+var makeFragment = function makeFragment(children) {
+  var fragment = new DocumentFragment(children);
+  sizeElementFromChildren(fragment);
+  return fragment;
+};
+/**
+ * Wraps group in a span if it's a document fragment, allowing to apply classes
+ * and styles
+ */
+
+
+var wrapFragment = function wrapFragment(group, options) {
+  if (group instanceof DocumentFragment) {
+    return makeSpan([], [group], options);
+  }
+
+  return group;
+}; // These are exact object types to catch typos in the names of the optional fields.
+
+
+// Computes the updated `children` list and the overall depth.
+//
+// This helper function for makeVList makes it easier to enforce type safety by
+// allowing early exits (returns) in the logic.
+var getVListChildrenAndDepth = function getVListChildrenAndDepth(params) {
+  if (params.positionType === "individualShift") {
+    var oldChildren = params.children;
+    var children = [oldChildren[0]]; // Add in kerns to the list of params.children to get each element to be
+    // shifted to the correct specified shift
+
+    var _depth = -oldChildren[0].shift - oldChildren[0].elem.depth;
+
+    var currPos = _depth;
+
+    for (var i = 1; i < oldChildren.length; i++) {
+      var diff = -oldChildren[i].shift - currPos - oldChildren[i].elem.depth;
+      var size = diff - (oldChildren[i - 1].elem.height + oldChildren[i - 1].elem.depth);
+      currPos = currPos + diff;
+      children.push({
+        type: "kern",
+        size: size
+      });
+      children.push(oldChildren[i]);
+    }
+
+    return {
+      children: children,
+      depth: _depth
+    };
+  }
+
+  var depth;
+
+  if (params.positionType === "top") {
+    // We always start at the bottom, so calculate the bottom by adding up
+    // all the sizes
+    var bottom = params.positionData;
+
+    for (var _i = 0; _i < params.children.length; _i++) {
+      var child = params.children[_i];
+      bottom -= child.type === "kern" ? child.size : child.elem.height + child.elem.depth;
+    }
+
+    depth = bottom;
+  } else if (params.positionType === "bottom") {
+    depth = -params.positionData;
+  } else {
+    var firstChild = params.children[0];
+
+    if (firstChild.type !== "elem") {
+      throw new Error('First child must have type "elem".');
+    }
+
+    if (params.positionType === "shift") {
+      depth = -firstChild.elem.depth - params.positionData;
+    } else if (params.positionType === "firstBaseline") {
+      depth = -firstChild.elem.depth;
+    } else {
+      throw new Error("Invalid positionType " + params.positionType + ".");
+    }
+  }
+
+  return {
+    children: params.children,
+    depth: depth
+  };
+};
+/**
+ * Makes a vertical list by stacking elements and kerns on top of each other.
+ * Allows for many different ways of specifying the positioning method.
+ *
+ * See VListParam documentation above.
+ */
+
+
+var makeVList = function makeVList(params, options) {
+  var _getVListChildrenAndD = getVListChildrenAndDepth(params),
+      children = _getVListChildrenAndD.children,
+      depth = _getVListChildrenAndD.depth; // Create a strut that is taller than any list item. The strut is added to
+  // each item, where it will determine the item's baseline. Since it has
+  // `overflow:hidden`, the strut's top edge will sit on the item's line box's
+  // top edge and the strut's bottom edge will sit on the item's baseline,
+  // with no additional line-height spacing. This allows the item baseline to
+  // be positioned precisely without worrying about font ascent and
+  // line-height.
+
+
+  var pstrutSize = 0;
+
+  for (var i = 0; i < children.length; i++) {
+    var child = children[i];
+
+    if (child.type === "elem") {
+      var elem = child.elem;
+      pstrutSize = Math.max(pstrutSize, elem.maxFontSize, elem.height);
+    }
+  }
+
+  pstrutSize += 2;
+  var pstrut = makeSpan(["pstrut"], []);
+  pstrut.style.height = makeEm(pstrutSize); // Create a new list of actual children at the correct offsets
+
+  var realChildren = [];
+  var minPos = depth;
+  var maxPos = depth;
+  var currPos = depth;
+
+  for (var _i2 = 0; _i2 < children.length; _i2++) {
+    var _child = children[_i2];
+
+    if (_child.type === "kern") {
+      currPos += _child.size;
+    } else {
+      var _elem = _child.elem;
+      var classes = _child.wrapperClasses || [];
+      var style = _child.wrapperStyle || {};
+      var childWrap = makeSpan(classes, [pstrut, _elem], undefined, style);
+      childWrap.style.top = makeEm(-pstrutSize - currPos - _elem.depth);
+
+      if (_child.marginLeft) {
+        childWrap.style.marginLeft = _child.marginLeft;
+      }
+
+      if (_child.marginRight) {
+        childWrap.style.marginRight = _child.marginRight;
+      }
+
+      realChildren.push(childWrap);
+      currPos += _elem.height + _elem.depth;
+    }
+
+    minPos = Math.min(minPos, currPos);
+    maxPos = Math.max(maxPos, currPos);
+  } // The vlist contents go in a table-cell with `vertical-align:bottom`.
+  // This cell's bottom edge will determine the containing table's baseline
+  // without overly expanding the containing line-box.
+
+
+  var vlist = makeSpan(["vlist"], realChildren);
+  vlist.style.height = makeEm(maxPos); // A second row is used if necessary to represent the vlist's depth.
+
+  var rows;
+
+  if (minPos < 0) {
+    // We will define depth in an empty span with display: table-cell.
+    // It should render with the height that we define. But Chrome, in
+    // contenteditable mode only, treats that span as if it contains some
+    // text content. And that min-height over-rides our desired height.
+    // So we put another empty span inside the depth strut span.
+    var emptySpan = makeSpan([], []);
+    var depthStrut = makeSpan(["vlist"], [emptySpan]);
+    depthStrut.style.height = makeEm(-minPos); // Safari wants the first row to have inline content; otherwise it
+    // puts the bottom of the *second* row on the baseline.
+
+    var topStrut = makeSpan(["vlist-s"], [new SymbolNode("\u200B")]);
+    rows = [makeSpan(["vlist-r"], [vlist, topStrut]), makeSpan(["vlist-r"], [depthStrut])];
+  } else {
+    rows = [makeSpan(["vlist-r"], [vlist])];
+  }
+
+  var vtable = makeSpan(["vlist-t"], rows);
+
+  if (rows.length === 2) {
+    vtable.classes.push("vlist-t2");
+  }
+
+  vtable.height = maxPos;
+  vtable.depth = -minPos;
+  return vtable;
+}; // Glue is a concept from TeX which is a flexible space between elements in
+// either a vertical or horizontal list. In KaTeX, at least for now, it's
+// static space between elements in a horizontal layout.
+
+
+var makeGlue = function makeGlue(measurement, options) {
+  // Make an empty span for the space
+  var rule = makeSpan(["mspace"], [], options);
+  var size = calculateSize(measurement, options);
+  rule.style.marginRight = makeEm(size);
+  return rule;
+}; // Takes font options, and returns the appropriate fontLookup name
+
+
+var retrieveTextFontName = function retrieveTextFontName(fontFamily, fontWeight, fontShape) {
+  var baseFontName = "";
+
+  switch (fontFamily) {
+    case "amsrm":
+      baseFontName = "AMS";
+      break;
+
+    case "textrm":
+      baseFontName = "Main";
+      break;
+
+    case "textsf":
+      baseFontName = "SansSerif";
+      break;
+
+    case "texttt":
+      baseFontName = "Typewriter";
+      break;
+
+    default:
+      baseFontName = fontFamily;
+    // use fonts added by a plugin
+  }
+
+  var fontStylesName;
+
+  if (fontWeight === "textbf" && fontShape === "textit") {
+    fontStylesName = "BoldItalic";
+  } else if (fontWeight === "textbf") {
+    fontStylesName = "Bold";
+  } else if (fontWeight === "textit") {
+    fontStylesName = "Italic";
+  } else {
+    fontStylesName = "Regular";
+  }
+
+  return baseFontName + "-" + fontStylesName;
+};
+/**
+ * Maps TeX font commands to objects containing:
+ * - variant: string used for "mathvariant" attribute in buildMathML.js
+ * - fontName: the "style" parameter to fontMetrics.getCharacterMetrics
+ */
+// A map between tex font commands an MathML mathvariant attribute values
+
+
+var fontMap = {
+  // styles
+  "mathbf": {
+    variant: "bold",
+    fontName: "Main-Bold"
+  },
+  "mathrm": {
+    variant: "normal",
+    fontName: "Main-Regular"
+  },
+  "textit": {
+    variant: "italic",
+    fontName: "Main-Italic"
+  },
+  "mathit": {
+    variant: "italic",
+    fontName: "Main-Italic"
+  },
+  "mathnormal": {
+    variant: "italic",
+    fontName: "Math-Italic"
+  },
+  // "boldsymbol" is missing because they require the use of multiple fonts:
+  // Math-BoldItalic and Main-Bold.  This is handled by a special case in
+  // makeOrd which ends up calling boldsymbol.
+  // families
+  "mathbb": {
+    variant: "double-struck",
+    fontName: "AMS-Regular"
+  },
+  "mathcal": {
+    variant: "script",
+    fontName: "Caligraphic-Regular"
+  },
+  "mathfrak": {
+    variant: "fraktur",
+    fontName: "Fraktur-Regular"
+  },
+  "mathscr": {
+    variant: "script",
+    fontName: "Script-Regular"
+  },
+  "mathsf": {
+    variant: "sans-serif",
+    fontName: "SansSerif-Regular"
+  },
+  "mathtt": {
+    variant: "monospace",
+    fontName: "Typewriter-Regular"
+  }
+};
+var svgData = {
+  //   path, width, height
+  vec: ["vec", 0.471, 0.714],
+  // values from the font glyph
+  oiintSize1: ["oiintSize1", 0.957, 0.499],
+  // oval to overlay the integrand
+  oiintSize2: ["oiintSize2", 1.472, 0.659],
+  oiiintSize1: ["oiiintSize1", 1.304, 0.499],
+  oiiintSize2: ["oiiintSize2", 1.98, 0.659]
+};
+
+var staticSvg = function staticSvg(value, options) {
+  // Create a span with inline SVG for the element.
+  var _svgData$value = svgData[value],
+      pathName = _svgData$value[0],
+      width = _svgData$value[1],
+      height = _svgData$value[2];
+  var path = new PathNode(pathName);
+  var svgNode = new SvgNode([path], {
+    "width": makeEm(width),
+    "height": makeEm(height),
+    // Override CSS rule `.katex svg { width: 100% }`
+    "style": "width:" + makeEm(width),
+    "viewBox": "0 0 " + 1000 * width + " " + 1000 * height,
+    "preserveAspectRatio": "xMinYMin"
+  });
+  var span = makeSvgSpan(["overlay"], [svgNode], options);
+  span.height = height;
+  span.style.height = makeEm(height);
+  span.style.width = makeEm(width);
+  return span;
+};
+
+/* harmony default export */ var buildCommon = ({
+  fontMap: fontMap,
+  makeSymbol: makeSymbol,
+  mathsym: mathsym,
+  makeSpan: makeSpan,
+  makeSvgSpan: makeSvgSpan,
+  makeLineSpan: makeLineSpan,
+  makeAnchor: makeAnchor,
+  makeFragment: makeFragment,
+  wrapFragment: wrapFragment,
+  makeVList: makeVList,
+  makeOrd: makeOrd,
+  makeGlue: makeGlue,
+  staticSvg: staticSvg,
+  svgData: svgData,
+  tryCombineChars: tryCombineChars
+});
+;// CONCATENATED MODULE: ./src/spacingData.js
+/**
+ * Describes spaces between different classes of atoms.
+ */
+var thinspace = {
+  number: 3,
+  unit: "mu"
+};
+var mediumspace = {
+  number: 4,
+  unit: "mu"
+};
+var thickspace = {
+  number: 5,
+  unit: "mu"
+}; // Making the type below exact with all optional fields doesn't work due to
+// - https://github.com/facebook/flow/issues/4582
+// - https://github.com/facebook/flow/issues/5688
+// However, since *all* fields are optional, $Shape<> works as suggested in 5688
+// above.
+
+// Spacing relationships for display and text styles
+var spacings = {
+  mord: {
+    mop: thinspace,
+    mbin: mediumspace,
+    mrel: thickspace,
+    minner: thinspace
+  },
+  mop: {
+    mord: thinspace,
+    mop: thinspace,
+    mrel: thickspace,
+    minner: thinspace
+  },
+  mbin: {
+    mord: mediumspace,
+    mop: mediumspace,
+    mopen: mediumspace,
+    minner: mediumspace
+  },
+  mrel: {
+    mord: thickspace,
+    mop: thickspace,
+    mopen: thickspace,
+    minner: thickspace
+  },
+  mopen: {},
+  mclose: {
+    mop: thinspace,
+    mbin: mediumspace,
+    mrel: thickspace,
+    minner: thinspace
+  },
+  mpunct: {
+    mord: thinspace,
+    mop: thinspace,
+    mrel: thickspace,
+    mopen: thinspace,
+    mclose: thinspace,
+    mpunct: thinspace,
+    minner: thinspace
+  },
+  minner: {
+    mord: thinspace,
+    mop: thinspace,
+    mbin: mediumspace,
+    mrel: thickspace,
+    mopen: thinspace,
+    mpunct: thinspace,
+    minner: thinspace
+  }
+}; // Spacing relationships for script and scriptscript styles
+
+var tightSpacings = {
+  mord: {
+    mop: thinspace
+  },
+  mop: {
+    mord: thinspace,
+    mop: thinspace
+  },
+  mbin: {},
+  mrel: {},
+  mopen: {},
+  mclose: {
+    mop: thinspace
+  },
+  mpunct: {},
+  minner: {
+    mop: thinspace
+  }
+};
+;// CONCATENATED MODULE: ./src/defineFunction.js
+/** Context provided to function handlers for error messages. */
+// Note: reverse the order of the return type union will cause a flow error.
+// See https://github.com/facebook/flow/issues/3663.
+// More general version of `HtmlBuilder` for nodes (e.g. \sum, accent types)
+// whose presence impacts super/subscripting. In this case, ParseNode<"supsub">
+// delegates its HTML building to the HtmlBuilder corresponding to these nodes.
+
+/**
+ * Final function spec for use at parse time.
+ * This is almost identical to `FunctionPropSpec`, except it
+ * 1. includes the function handler, and
+ * 2. requires all arguments except argTypes.
+ * It is generated by `defineFunction()` below.
+ */
+
+/**
+ * All registered functions.
+ * `functions.js` just exports this same dictionary again and makes it public.
+ * `Parser.js` requires this dictionary.
+ */
+var _functions = {};
+/**
+ * All HTML builders. Should be only used in the `define*` and the `build*ML`
+ * functions.
+ */
+
+var _htmlGroupBuilders = {};
+/**
+ * All MathML builders. Should be only used in the `define*` and the `build*ML`
+ * functions.
+ */
+
+var _mathmlGroupBuilders = {};
+function defineFunction(_ref) {
+  var type = _ref.type,
+      names = _ref.names,
+      props = _ref.props,
+      handler = _ref.handler,
+      htmlBuilder = _ref.htmlBuilder,
+      mathmlBuilder = _ref.mathmlBuilder;
+  // Set default values of functions
+  var data = {
+    type: type,
+    numArgs: props.numArgs,
+    argTypes: props.argTypes,
+    allowedInArgument: !!props.allowedInArgument,
+    allowedInText: !!props.allowedInText,
+    allowedInMath: props.allowedInMath === undefined ? true : props.allowedInMath,
+    numOptionalArgs: props.numOptionalArgs || 0,
+    infix: !!props.infix,
+    primitive: !!props.primitive,
+    handler: handler
+  };
+
+  for (var i = 0; i < names.length; ++i) {
+    _functions[names[i]] = data;
+  }
+
+  if (type) {
+    if (htmlBuilder) {
+      _htmlGroupBuilders[type] = htmlBuilder;
+    }
+
+    if (mathmlBuilder) {
+      _mathmlGroupBuilders[type] = mathmlBuilder;
+    }
+  }
+}
+/**
+ * Use this to register only the HTML and MathML builders for a function (e.g.
+ * if the function's ParseNode is generated in Parser.js rather than via a
+ * stand-alone handler provided to `defineFunction`).
+ */
+
+function defineFunctionBuilders(_ref2) {
+  var type = _ref2.type,
+      htmlBuilder = _ref2.htmlBuilder,
+      mathmlBuilder = _ref2.mathmlBuilder;
+  defineFunction({
+    type: type,
+    names: [],
+    props: {
+      numArgs: 0
+    },
+    handler: function handler() {
+      throw new Error('Should never be called.');
+    },
+    htmlBuilder: htmlBuilder,
+    mathmlBuilder: mathmlBuilder
+  });
+}
+var normalizeArgument = function normalizeArgument(arg) {
+  return arg.type === "ordgroup" && arg.body.length === 1 ? arg.body[0] : arg;
+}; // Since the corresponding buildHTML/buildMathML function expects a
+// list of elements, we normalize for different kinds of arguments
+
+var ordargument = function ordargument(arg) {
+  return arg.type === "ordgroup" ? arg.body : [arg];
+};
+;// CONCATENATED MODULE: ./src/buildHTML.js
+/**
+ * This file does the main work of building a domTree structure from a parse
+ * tree. The entry point is the `buildHTML` function, which takes a parse tree.
+ * Then, the buildExpression, buildGroup, and various groupBuilders functions
+ * are called, to produce a final HTML tree.
+ */
+
+
+
+
+
+
+
+
+
+var buildHTML_makeSpan = buildCommon.makeSpan; // Binary atoms (first class `mbin`) change into ordinary atoms (`mord`)
+// depending on their surroundings. See TeXbook pg. 442-446, Rules 5 and 6,
+// and the text before Rule 19.
+
+var binLeftCanceller = ["leftmost", "mbin", "mopen", "mrel", "mop", "mpunct"];
+var binRightCanceller = ["rightmost", "mrel", "mclose", "mpunct"];
+var styleMap = {
+  "display": src_Style.DISPLAY,
+  "text": src_Style.TEXT,
+  "script": src_Style.SCRIPT,
+  "scriptscript": src_Style.SCRIPTSCRIPT
+};
+var DomEnum = {
+  mord: "mord",
+  mop: "mop",
+  mbin: "mbin",
+  mrel: "mrel",
+  mopen: "mopen",
+  mclose: "mclose",
+  mpunct: "mpunct",
+  minner: "minner"
+};
+
+/**
+ * Take a list of nodes, build them in order, and return a list of the built
+ * nodes. documentFragments are flattened into their contents, so the
+ * returned list contains no fragments. `isRealGroup` is true if `expression`
+ * is a real group (no atoms will be added on either side), as opposed to
+ * a partial group (e.g. one created by \color). `surrounding` is an array
+ * consisting type of nodes that will be added to the left and right.
+ */
+var buildExpression = function buildExpression(expression, options, isRealGroup, surrounding) {
+  if (surrounding === void 0) {
+    surrounding = [null, null];
+  }
+
+  // Parse expressions into `groups`.
+  var groups = [];
+
+  for (var i = 0; i < expression.length; i++) {
+    var output = buildGroup(expression[i], options);
+
+    if (output instanceof DocumentFragment) {
+      var children = output.children;
+      groups.push.apply(groups, children);
+    } else {
+      groups.push(output);
+    }
+  } // Combine consecutive domTree.symbolNodes into a single symbolNode.
+
+
+  buildCommon.tryCombineChars(groups); // If `expression` is a partial group, let the parent handle spacings
+  // to avoid processing groups multiple times.
+
+  if (!isRealGroup) {
+    return groups;
+  }
+
+  var glueOptions = options;
+
+  if (expression.length === 1) {
+    var node = expression[0];
+
+    if (node.type === "sizing") {
+      glueOptions = options.havingSize(node.size);
+    } else if (node.type === "styling") {
+      glueOptions = options.havingStyle(styleMap[node.style]);
+    }
+  } // Dummy spans for determining spacings between surrounding atoms.
+  // If `expression` has no atoms on the left or right, class "leftmost"
+  // or "rightmost", respectively, is used to indicate it.
+
+
+  var dummyPrev = buildHTML_makeSpan([surrounding[0] || "leftmost"], [], options);
+  var dummyNext = buildHTML_makeSpan([surrounding[1] || "rightmost"], [], options); // TODO: These code assumes that a node's math class is the first element
+  // of its `classes` array. A later cleanup should ensure this, for
+  // instance by changing the signature of `makeSpan`.
+  // Before determining what spaces to insert, perform bin cancellation.
+  // Binary operators change to ordinary symbols in some contexts.
+
+  var isRoot = isRealGroup === "root";
+  traverseNonSpaceNodes(groups, function (node, prev) {
+    var prevType = prev.classes[0];
+    var type = node.classes[0];
+
+    if (prevType === "mbin" && utils.contains(binRightCanceller, type)) {
+      prev.classes[0] = "mord";
+    } else if (type === "mbin" && utils.contains(binLeftCanceller, prevType)) {
+      node.classes[0] = "mord";
+    }
+  }, {
+    node: dummyPrev
+  }, dummyNext, isRoot);
+  traverseNonSpaceNodes(groups, function (node, prev) {
+    var prevType = getTypeOfDomTree(prev);
+    var type = getTypeOfDomTree(node); // 'mtight' indicates that the node is script or scriptscript style.
+
+    var space = prevType && type ? node.hasClass("mtight") ? tightSpacings[prevType][type] : spacings[prevType][type] : null;
+
+    if (space) {
+      // Insert glue (spacing) after the `prev`.
+      return buildCommon.makeGlue(space, glueOptions);
+    }
+  }, {
+    node: dummyPrev
+  }, dummyNext, isRoot);
+  return groups;
+}; // Depth-first traverse non-space `nodes`, calling `callback` with the current and
+// previous node as arguments, optionally returning a node to insert after the
+// previous node. `prev` is an object with the previous node and `insertAfter`
+// function to insert after it. `next` is a node that will be added to the right.
+// Used for bin cancellation and inserting spacings.
+
+var traverseNonSpaceNodes = function traverseNonSpaceNodes(nodes, callback, prev, next, isRoot) {
+  if (next) {
+    // temporarily append the right node, if exists
+    nodes.push(next);
+  }
+
+  var i = 0;
+
+  for (; i < nodes.length; i++) {
+    var node = nodes[i];
+    var partialGroup = checkPartialGroup(node);
+
+    if (partialGroup) {
+      // Recursive DFS
+      // $FlowFixMe: make nodes a $ReadOnlyArray by returning a new array
+      traverseNonSpaceNodes(partialGroup.children, callback, prev, null, isRoot);
+      continue;
+    } // Ignore explicit spaces (e.g., \;, \,) when determining what implicit
+    // spacing should go between atoms of different classes
+
+
+    var nonspace = !node.hasClass("mspace");
+
+    if (nonspace) {
+      var result = callback(node, prev.node);
+
+      if (result) {
+        if (prev.insertAfter) {
+          prev.insertAfter(result);
+        } else {
+          // insert at front
+          nodes.unshift(result);
+          i++;
+        }
+      }
+    }
+
+    if (nonspace) {
+      prev.node = node;
+    } else if (isRoot && node.hasClass("newline")) {
+      prev.node = buildHTML_makeSpan(["leftmost"]); // treat like beginning of line
+    }
+
+    prev.insertAfter = function (index) {
+      return function (n) {
+        nodes.splice(index + 1, 0, n);
+        i++;
+      };
+    }(i);
+  }
+
+  if (next) {
+    nodes.pop();
+  }
+}; // Check if given node is a partial group, i.e., does not affect spacing around.
+
+
+var checkPartialGroup = function checkPartialGroup(node) {
+  if (node instanceof DocumentFragment || node instanceof Anchor || node instanceof Span && node.hasClass("enclosing")) {
+    return node;
+  }
+
+  return null;
+}; // Return the outermost node of a domTree.
+
+
+var getOutermostNode = function getOutermostNode(node, side) {
+  var partialGroup = checkPartialGroup(node);
+
+  if (partialGroup) {
+    var children = partialGroup.children;
+
+    if (children.length) {
+      if (side === "right") {
+        return getOutermostNode(children[children.length - 1], "right");
+      } else if (side === "left") {
+        return getOutermostNode(children[0], "left");
+      }
+    }
+  }
+
+  return node;
+}; // Return math atom class (mclass) of a domTree.
+// If `side` is given, it will get the type of the outermost node at given side.
+
+
+var getTypeOfDomTree = function getTypeOfDomTree(node, side) {
+  if (!node) {
+    return null;
+  }
+
+  if (side) {
+    node = getOutermostNode(node, side);
+  } // This makes a lot of assumptions as to where the type of atom
+  // appears.  We should do a better job of enforcing this.
+
+
+  return DomEnum[node.classes[0]] || null;
+};
+var makeNullDelimiter = function makeNullDelimiter(options, classes) {
+  var moreClasses = ["nulldelimiter"].concat(options.baseSizingClasses());
+  return buildHTML_makeSpan(classes.concat(moreClasses));
+};
+/**
+ * buildGroup is the function that takes a group and calls the correct groupType
+ * function for it. It also handles the interaction of size and style changes
+ * between parents and children.
+ */
+
+var buildGroup = function buildGroup(group, options, baseOptions) {
+  if (!group) {
+    return buildHTML_makeSpan();
+  }
+
+  if (_htmlGroupBuilders[group.type]) {
+    // Call the groupBuilders function
+    // $FlowFixMe
+    var groupNode = _htmlGroupBuilders[group.type](group, options); // If the size changed between the parent and the current group, account
+    // for that size difference.
+
+    if (baseOptions && options.size !== baseOptions.size) {
+      groupNode = buildHTML_makeSpan(options.sizingClasses(baseOptions), [groupNode], options);
+      var multiplier = options.sizeMultiplier / baseOptions.sizeMultiplier;
+      groupNode.height *= multiplier;
+      groupNode.depth *= multiplier;
+    }
+
+    return groupNode;
+  } else {
+    throw new src_ParseError("Got group of unknown type: '" + group.type + "'");
+  }
+};
+/**
+ * Combine an array of HTML DOM nodes (e.g., the output of `buildExpression`)
+ * into an unbreakable HTML node of class .base, with proper struts to
+ * guarantee correct vertical extent.  `buildHTML` calls this repeatedly to
+ * make up the entire expression as a sequence of unbreakable units.
+ */
+
+function buildHTMLUnbreakable(children, options) {
+  // Compute height and depth of this chunk.
+  var body = buildHTML_makeSpan(["base"], children, options); // Add strut, which ensures that the top of the HTML element falls at
+  // the height of the expression, and the bottom of the HTML element
+  // falls at the depth of the expression.
+
+  var strut = buildHTML_makeSpan(["strut"]);
+  strut.style.height = makeEm(body.height + body.depth);
+
+  if (body.depth) {
+    strut.style.verticalAlign = makeEm(-body.depth);
+  }
+
+  body.children.unshift(strut);
+  return body;
+}
+/**
+ * Take an entire parse tree, and build it into an appropriate set of HTML
+ * nodes.
+ */
+
+
+function buildHTML(tree, options) {
+  // Strip off outer tag wrapper for processing below.
+  var tag = null;
+
+  if (tree.length === 1 && tree[0].type === "tag") {
+    tag = tree[0].tag;
+    tree = tree[0].body;
+  } // Build the expression contained in the tree
+
+
+  var expression = buildExpression(tree, options, "root");
+  var eqnNum;
+
+  if (expression.length === 2 && expression[1].hasClass("tag")) {
+    // An environment with automatic equation numbers, e.g. {gather}.
+    eqnNum = expression.pop();
+  }
+
+  var children = []; // Create one base node for each chunk between potential line breaks.
+  // The TeXBook [p.173] says "A formula will be broken only after a
+  // relation symbol like $=$ or $<$ or $\rightarrow$, or after a binary
+  // operation symbol like $+$ or $-$ or $\times$, where the relation or
+  // binary operation is on the ``outer level'' of the formula (i.e., not
+  // enclosed in {...} and not part of an \over construction)."
+
+  var parts = [];
+
+  for (var i = 0; i < expression.length; i++) {
+    parts.push(expression[i]);
+
+    if (expression[i].hasClass("mbin") || expression[i].hasClass("mrel") || expression[i].hasClass("allowbreak")) {
+      // Put any post-operator glue on same line as operator.
+      // Watch for \nobreak along the way, and stop at \newline.
+      var nobreak = false;
+
+      while (i < expression.length - 1 && expression[i + 1].hasClass("mspace") && !expression[i + 1].hasClass("newline")) {
+        i++;
+        parts.push(expression[i]);
+
+        if (expression[i].hasClass("nobreak")) {
+          nobreak = true;
+        }
+      } // Don't allow break if \nobreak among the post-operator glue.
+
+
+      if (!nobreak) {
+        children.push(buildHTMLUnbreakable(parts, options));
+        parts = [];
+      }
+    } else if (expression[i].hasClass("newline")) {
+      // Write the line except the newline
+      parts.pop();
+
+      if (parts.length > 0) {
+        children.push(buildHTMLUnbreakable(parts, options));
+        parts = [];
+      } // Put the newline at the top level
+
+
+      children.push(expression[i]);
+    }
+  }
+
+  if (parts.length > 0) {
+    children.push(buildHTMLUnbreakable(parts, options));
+  } // Now, if there was a tag, build it too and append it as a final child.
+
+
+  var tagChild;
+
+  if (tag) {
+    tagChild = buildHTMLUnbreakable(buildExpression(tag, options, true));
+    tagChild.classes = ["tag"];
+    children.push(tagChild);
+  } else if (eqnNum) {
+    children.push(eqnNum);
+  }
+
+  var htmlNode = buildHTML_makeSpan(["katex-html"], children);
+  htmlNode.setAttribute("aria-hidden", "true"); // Adjust the strut of the tag to be the maximum height of all children
+  // (the height of the enclosing htmlNode) for proper vertical alignment.
+
+  if (tagChild) {
+    var strut = tagChild.children[0];
+    strut.style.height = makeEm(htmlNode.height + htmlNode.depth);
+
+    if (htmlNode.depth) {
+      strut.style.verticalAlign = makeEm(-htmlNode.depth);
+    }
+  }
+
+  return htmlNode;
+}
+;// CONCATENATED MODULE: ./src/mathMLTree.js
+/**
+ * These objects store data about MathML nodes. This is the MathML equivalent
+ * of the types in domTree.js. Since MathML handles its own rendering, and
+ * since we're mainly using MathML to improve accessibility, we don't manage
+ * any of the styling state that the plain DOM nodes do.
+ *
+ * The `toNode` and `toMarkup` functions work similarly to how they do in
+ * domTree.js, creating namespaced DOM nodes and HTML text markup respectively.
+ */
+
+
+
+
+function newDocumentFragment(children) {
+  return new DocumentFragment(children);
+}
+/**
+ * This node represents a general purpose MathML node of any type. The
+ * constructor requires the type of node to create (for example, `"mo"` or
+ * `"mspace"`, corresponding to `` and `` tags).
+ */
+
+var MathNode = /*#__PURE__*/function () {
+  function MathNode(type, children, classes) {
+    this.type = void 0;
+    this.attributes = void 0;
+    this.children = void 0;
+    this.classes = void 0;
+    this.type = type;
+    this.attributes = {};
+    this.children = children || [];
+    this.classes = classes || [];
+  }
+  /**
+   * Sets an attribute on a MathML node. MathML depends on attributes to convey a
+   * semantic content, so this is used heavily.
+   */
+
+
+  var _proto = MathNode.prototype;
+
+  _proto.setAttribute = function setAttribute(name, value) {
+    this.attributes[name] = value;
+  }
+  /**
+   * Gets an attribute on a MathML node.
+   */
+  ;
+
+  _proto.getAttribute = function getAttribute(name) {
+    return this.attributes[name];
+  }
+  /**
+   * Converts the math node into a MathML-namespaced DOM element.
+   */
+  ;
+
+  _proto.toNode = function toNode() {
+    var node = document.createElementNS("http://www.w3.org/1998/Math/MathML", this.type);
+
+    for (var attr in this.attributes) {
+      if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
+        node.setAttribute(attr, this.attributes[attr]);
+      }
+    }
+
+    if (this.classes.length > 0) {
+      node.className = createClass(this.classes);
+    }
+
+    for (var i = 0; i < this.children.length; i++) {
+      node.appendChild(this.children[i].toNode());
+    }
+
+    return node;
+  }
+  /**
+   * Converts the math node into an HTML markup string.
+   */
+  ;
+
+  _proto.toMarkup = function toMarkup() {
+    var markup = "<" + this.type; // Add the attributes
+
+    for (var attr in this.attributes) {
+      if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
+        markup += " " + attr + "=\"";
+        markup += utils.escape(this.attributes[attr]);
+        markup += "\"";
+      }
+    }
+
+    if (this.classes.length > 0) {
+      markup += " class =\"" + utils.escape(createClass(this.classes)) + "\"";
+    }
+
+    markup += ">";
+
+    for (var i = 0; i < this.children.length; i++) {
+      markup += this.children[i].toMarkup();
+    }
+
+    markup += "";
+    return markup;
+  }
+  /**
+   * Converts the math node into a string, similar to innerText, but escaped.
+   */
+  ;
+
+  _proto.toText = function toText() {
+    return this.children.map(function (child) {
+      return child.toText();
+    }).join("");
+  };
+
+  return MathNode;
+}();
+/**
+ * This node represents a piece of text.
+ */
+
+var TextNode = /*#__PURE__*/function () {
+  function TextNode(text) {
+    this.text = void 0;
+    this.text = text;
+  }
+  /**
+   * Converts the text node into a DOM text node.
+   */
+
+
+  var _proto2 = TextNode.prototype;
+
+  _proto2.toNode = function toNode() {
+    return document.createTextNode(this.text);
+  }
+  /**
+   * Converts the text node into escaped HTML markup
+   * (representing the text itself).
+   */
+  ;
+
+  _proto2.toMarkup = function toMarkup() {
+    return utils.escape(this.toText());
+  }
+  /**
+   * Converts the text node into a string
+   * (representing the text itself).
+   */
+  ;
+
+  _proto2.toText = function toText() {
+    return this.text;
+  };
+
+  return TextNode;
+}();
+/**
+ * This node represents a space, but may render as  or as text,
+ * depending on the width.
+ */
+
+var SpaceNode = /*#__PURE__*/function () {
+  /**
+   * Create a Space node with width given in CSS ems.
+   */
+  function SpaceNode(width) {
+    this.width = void 0;
+    this.character = void 0;
+    this.width = width; // See https://www.w3.org/TR/2000/WD-MathML2-20000328/chapter6.html
+    // for a table of space-like characters.  We use Unicode
+    // representations instead of &LongNames; as it's not clear how to
+    // make the latter via document.createTextNode.
+
+    if (width >= 0.05555 && width <= 0.05556) {
+      this.character = "\u200A"; //  
+    } else if (width >= 0.1666 && width <= 0.1667) {
+      this.character = "\u2009"; //  
+    } else if (width >= 0.2222 && width <= 0.2223) {
+      this.character = "\u2005"; //  
+    } else if (width >= 0.2777 && width <= 0.2778) {
+      this.character = "\u2005\u200A"; //   
+    } else if (width >= -0.05556 && width <= -0.05555) {
+      this.character = "\u200A\u2063"; // ​
+    } else if (width >= -0.1667 && width <= -0.1666) {
+      this.character = "\u2009\u2063"; // ​
+    } else if (width >= -0.2223 && width <= -0.2222) {
+      this.character = "\u205F\u2063"; // ​
+    } else if (width >= -0.2778 && width <= -0.2777) {
+      this.character = "\u2005\u2063"; // ​
+    } else {
+      this.character = null;
+    }
+  }
+  /**
+   * Converts the math node into a MathML-namespaced DOM element.
+   */
+
+
+  var _proto3 = SpaceNode.prototype;
+
+  _proto3.toNode = function toNode() {
+    if (this.character) {
+      return document.createTextNode(this.character);
+    } else {
+      var node = document.createElementNS("http://www.w3.org/1998/Math/MathML", "mspace");
+      node.setAttribute("width", makeEm(this.width));
+      return node;
+    }
+  }
+  /**
+   * Converts the math node into an HTML markup string.
+   */
+  ;
+
+  _proto3.toMarkup = function toMarkup() {
+    if (this.character) {
+      return "" + this.character + "";
+    } else {
+      return "";
+    }
+  }
+  /**
+   * Converts the math node into a string, similar to innerText.
+   */
+  ;
+
+  _proto3.toText = function toText() {
+    if (this.character) {
+      return this.character;
+    } else {
+      return " ";
+    }
+  };
+
+  return SpaceNode;
+}();
+
+/* harmony default export */ var mathMLTree = ({
+  MathNode: MathNode,
+  TextNode: TextNode,
+  SpaceNode: SpaceNode,
+  newDocumentFragment: newDocumentFragment
+});
+;// CONCATENATED MODULE: ./src/buildMathML.js
+/**
+ * This file converts a parse tree into a corresponding MathML tree. The main
+ * entry point is the `buildMathML` function, which takes a parse tree from the
+ * parser.
+ */
+
+
+
+
+
+
+
+
+
+/**
+ * Takes a symbol and converts it into a MathML text node after performing
+ * optional replacement from symbols.js.
+ */
+var makeText = function makeText(text, mode, options) {
+  if (src_symbols[mode][text] && src_symbols[mode][text].replace && text.charCodeAt(0) !== 0xD835 && !(ligatures.hasOwnProperty(text) && options && (options.fontFamily && options.fontFamily.slice(4, 6) === "tt" || options.font && options.font.slice(4, 6) === "tt"))) {
+    text = src_symbols[mode][text].replace;
+  }
+
+  return new mathMLTree.TextNode(text);
+};
+/**
+ * Wrap the given array of nodes in an  node if needed, i.e.,
+ * unless the array has length 1.  Always returns a single node.
+ */
+
+var makeRow = function makeRow(body) {
+  if (body.length === 1) {
+    return body[0];
+  } else {
+    return new mathMLTree.MathNode("mrow", body);
+  }
+};
+/**
+ * Returns the math variant as a string or null if none is required.
+ */
+
+var getVariant = function getVariant(group, options) {
+  // Handle \text... font specifiers as best we can.
+  // MathML has a limited list of allowable mathvariant specifiers; see
+  // https://www.w3.org/TR/MathML3/chapter3.html#presm.commatt
+  if (options.fontFamily === "texttt") {
+    return "monospace";
+  } else if (options.fontFamily === "textsf") {
+    if (options.fontShape === "textit" && options.fontWeight === "textbf") {
+      return "sans-serif-bold-italic";
+    } else if (options.fontShape === "textit") {
+      return "sans-serif-italic";
+    } else if (options.fontWeight === "textbf") {
+      return "bold-sans-serif";
+    } else {
+      return "sans-serif";
+    }
+  } else if (options.fontShape === "textit" && options.fontWeight === "textbf") {
+    return "bold-italic";
+  } else if (options.fontShape === "textit") {
+    return "italic";
+  } else if (options.fontWeight === "textbf") {
+    return "bold";
+  }
+
+  var font = options.font;
+
+  if (!font || font === "mathnormal") {
+    return null;
+  }
+
+  var mode = group.mode;
+
+  if (font === "mathit") {
+    return "italic";
+  } else if (font === "boldsymbol") {
+    return group.type === "textord" ? "bold" : "bold-italic";
+  } else if (font === "mathbf") {
+    return "bold";
+  } else if (font === "mathbb") {
+    return "double-struck";
+  } else if (font === "mathfrak") {
+    return "fraktur";
+  } else if (font === "mathscr" || font === "mathcal") {
+    // MathML makes no distinction between script and calligraphic
+    return "script";
+  } else if (font === "mathsf") {
+    return "sans-serif";
+  } else if (font === "mathtt") {
+    return "monospace";
+  }
+
+  var text = group.text;
+
+  if (utils.contains(["\\imath", "\\jmath"], text)) {
+    return null;
+  }
+
+  if (src_symbols[mode][text] && src_symbols[mode][text].replace) {
+    text = src_symbols[mode][text].replace;
+  }
+
+  var fontName = buildCommon.fontMap[font].fontName;
+
+  if (getCharacterMetrics(text, fontName, mode)) {
+    return buildCommon.fontMap[font].variant;
+  }
+
+  return null;
+};
+/**
+ * Takes a list of nodes, builds them, and returns a list of the generated
+ * MathML nodes.  Also combine consecutive  outputs into a single
+ *  tag.
+ */
+
+var buildMathML_buildExpression = function buildExpression(expression, options, isOrdgroup) {
+  if (expression.length === 1) {
+    var group = buildMathML_buildGroup(expression[0], options);
+
+    if (isOrdgroup && group instanceof MathNode && group.type === "mo") {
+      // When TeX writers want to suppress spacing on an operator,
+      // they often put the operator by itself inside braces.
+      group.setAttribute("lspace", "0em");
+      group.setAttribute("rspace", "0em");
+    }
+
+    return [group];
+  }
+
+  var groups = [];
+  var lastGroup;
+
+  for (var i = 0; i < expression.length; i++) {
+    var _group = buildMathML_buildGroup(expression[i], options);
+
+    if (_group instanceof MathNode && lastGroup instanceof MathNode) {
+      // Concatenate adjacent s
+      if (_group.type === 'mtext' && lastGroup.type === 'mtext' && _group.getAttribute('mathvariant') === lastGroup.getAttribute('mathvariant')) {
+        var _lastGroup$children;
+
+        (_lastGroup$children = lastGroup.children).push.apply(_lastGroup$children, _group.children);
+
+        continue; // Concatenate adjacent s
+      } else if (_group.type === 'mn' && lastGroup.type === 'mn') {
+        var _lastGroup$children2;
+
+        (_lastGroup$children2 = lastGroup.children).push.apply(_lastGroup$children2, _group.children);
+
+        continue; // Concatenate ... followed by .
+      } else if (_group.type === 'mi' && _group.children.length === 1 && lastGroup.type === 'mn') {
+        var child = _group.children[0];
+
+        if (child instanceof TextNode && child.text === '.') {
+          var _lastGroup$children3;
+
+          (_lastGroup$children3 = lastGroup.children).push.apply(_lastGroup$children3, _group.children);
+
+          continue;
+        }
+      } else if (lastGroup.type === 'mi' && lastGroup.children.length === 1) {
+        var lastChild = lastGroup.children[0];
+
+        if (lastChild instanceof TextNode && lastChild.text === "\u0338" && (_group.type === 'mo' || _group.type === 'mi' || _group.type === 'mn')) {
+          var _child = _group.children[0];
+
+          if (_child instanceof TextNode && _child.text.length > 0) {
+            // Overlay with combining character long solidus
+            _child.text = _child.text.slice(0, 1) + "\u0338" + _child.text.slice(1);
+            groups.pop();
+          }
+        }
+      }
+    }
+
+    groups.push(_group);
+    lastGroup = _group;
+  }
+
+  return groups;
+};
+/**
+ * Equivalent to buildExpression, but wraps the elements in an 
+ * if there's more than one.  Returns a single node instead of an array.
+ */
+
+var buildExpressionRow = function buildExpressionRow(expression, options, isOrdgroup) {
+  return makeRow(buildMathML_buildExpression(expression, options, isOrdgroup));
+};
+/**
+ * Takes a group from the parser and calls the appropriate groupBuilders function
+ * on it to produce a MathML node.
+ */
+
+var buildMathML_buildGroup = function buildGroup(group, options) {
+  if (!group) {
+    return new mathMLTree.MathNode("mrow");
+  }
+
+  if (_mathmlGroupBuilders[group.type]) {
+    // Call the groupBuilders function
+    // $FlowFixMe
+    var result = _mathmlGroupBuilders[group.type](group, options); // $FlowFixMe
+
+    return result;
+  } else {
+    throw new src_ParseError("Got group of unknown type: '" + group.type + "'");
+  }
+};
+/**
+ * Takes a full parse tree and settings and builds a MathML representation of
+ * it. In particular, we put the elements from building the parse tree into a
+ *  tag so we can also include that TeX source as an annotation.
+ *
+ * Note that we actually return a domTree element with a `` inside it so
+ * we can do appropriate styling.
+ */
+
+function buildMathML(tree, texExpression, options, isDisplayMode, forMathmlOnly) {
+  var expression = buildMathML_buildExpression(tree, options); // TODO: Make a pass thru the MathML similar to buildHTML.traverseNonSpaceNodes
+  // and add spacing nodes. This is necessary only adjacent to math operators
+  // like \sin or \lim or to subsup elements that contain math operators.
+  // MathML takes care of the other spacing issues.
+  // Wrap up the expression in an mrow so it is presented in the semantics
+  // tag correctly, unless it's a single  or .
+
+  var wrapper;
+
+  if (expression.length === 1 && expression[0] instanceof MathNode && utils.contains(["mrow", "mtable"], expression[0].type)) {
+    wrapper = expression[0];
+  } else {
+    wrapper = new mathMLTree.MathNode("mrow", expression);
+  } // Build a TeX annotation of the source
+
+
+  var annotation = new mathMLTree.MathNode("annotation", [new mathMLTree.TextNode(texExpression)]);
+  annotation.setAttribute("encoding", "application/x-tex");
+  var semantics = new mathMLTree.MathNode("semantics", [wrapper, annotation]);
+  var math = new mathMLTree.MathNode("math", [semantics]);
+  math.setAttribute("xmlns", "http://www.w3.org/1998/Math/MathML");
+
+  if (isDisplayMode) {
+    math.setAttribute("display", "block");
+  } // You can't style  nodes, so we wrap the node in a span.
+  // NOTE: The span class is not typed to have  nodes as children, and
+  // we don't want to make the children type more generic since the children
+  // of span are expected to have more fields in `buildHtml` contexts.
+
+
+  var wrapperClass = forMathmlOnly ? "katex" : "katex-mathml"; // $FlowFixMe
+
+  return buildCommon.makeSpan([wrapperClass], [math]);
+}
+;// CONCATENATED MODULE: ./src/buildTree.js
+
+
+
+
+
+
+
+var optionsFromSettings = function optionsFromSettings(settings) {
+  return new src_Options({
+    style: settings.displayMode ? src_Style.DISPLAY : src_Style.TEXT,
+    maxSize: settings.maxSize,
+    minRuleThickness: settings.minRuleThickness
+  });
+};
+
+var displayWrap = function displayWrap(node, settings) {
+  if (settings.displayMode) {
+    var classes = ["katex-display"];
+
+    if (settings.leqno) {
+      classes.push("leqno");
+    }
+
+    if (settings.fleqn) {
+      classes.push("fleqn");
+    }
+
+    node = buildCommon.makeSpan(classes, [node]);
+  }
+
+  return node;
+};
+
+var buildTree = function buildTree(tree, expression, settings) {
+  var options = optionsFromSettings(settings);
+  var katexNode;
+
+  if (settings.output === "mathml") {
+    return buildMathML(tree, expression, options, settings.displayMode, true);
+  } else if (settings.output === "html") {
+    var htmlNode = buildHTML(tree, options);
+    katexNode = buildCommon.makeSpan(["katex"], [htmlNode]);
+  } else {
+    var mathMLNode = buildMathML(tree, expression, options, settings.displayMode, false);
+
+    var _htmlNode = buildHTML(tree, options);
+
+    katexNode = buildCommon.makeSpan(["katex"], [mathMLNode, _htmlNode]);
+  }
+
+  return displayWrap(katexNode, settings);
+};
+var buildHTMLTree = function buildHTMLTree(tree, expression, settings) {
+  var options = optionsFromSettings(settings);
+  var htmlNode = buildHTML(tree, options);
+  var katexNode = buildCommon.makeSpan(["katex"], [htmlNode]);
+  return displayWrap(katexNode, settings);
+};
+/* harmony default export */ var src_buildTree = ((/* unused pure expression or super */ null && (buildTree)));
+;// CONCATENATED MODULE: ./src/stretchy.js
+/**
+ * This file provides support to buildMathML.js and buildHTML.js
+ * for stretchy wide elements rendered from SVG files
+ * and other CSS trickery.
+ */
+
+
+
+
+
+var stretchyCodePoint = {
+  widehat: "^",
+  widecheck: "ˇ",
+  widetilde: "~",
+  utilde: "~",
+  overleftarrow: "\u2190",
+  underleftarrow: "\u2190",
+  xleftarrow: "\u2190",
+  overrightarrow: "\u2192",
+  underrightarrow: "\u2192",
+  xrightarrow: "\u2192",
+  underbrace: "\u23DF",
+  overbrace: "\u23DE",
+  overgroup: "\u23E0",
+  undergroup: "\u23E1",
+  overleftrightarrow: "\u2194",
+  underleftrightarrow: "\u2194",
+  xleftrightarrow: "\u2194",
+  Overrightarrow: "\u21D2",
+  xRightarrow: "\u21D2",
+  overleftharpoon: "\u21BC",
+  xleftharpoonup: "\u21BC",
+  overrightharpoon: "\u21C0",
+  xrightharpoonup: "\u21C0",
+  xLeftarrow: "\u21D0",
+  xLeftrightarrow: "\u21D4",
+  xhookleftarrow: "\u21A9",
+  xhookrightarrow: "\u21AA",
+  xmapsto: "\u21A6",
+  xrightharpoondown: "\u21C1",
+  xleftharpoondown: "\u21BD",
+  xrightleftharpoons: "\u21CC",
+  xleftrightharpoons: "\u21CB",
+  xtwoheadleftarrow: "\u219E",
+  xtwoheadrightarrow: "\u21A0",
+  xlongequal: "=",
+  xtofrom: "\u21C4",
+  xrightleftarrows: "\u21C4",
+  xrightequilibrium: "\u21CC",
+  // Not a perfect match.
+  xleftequilibrium: "\u21CB",
+  // None better available.
+  "\\cdrightarrow": "\u2192",
+  "\\cdleftarrow": "\u2190",
+  "\\cdlongequal": "="
+};
+
+var mathMLnode = function mathMLnode(label) {
+  var node = new mathMLTree.MathNode("mo", [new mathMLTree.TextNode(stretchyCodePoint[label.replace(/^\\/, '')])]);
+  node.setAttribute("stretchy", "true");
+  return node;
+}; // Many of the KaTeX SVG images have been adapted from glyphs in KaTeX fonts.
+// Copyright (c) 2009-2010, Design Science, Inc. ()
+// Copyright (c) 2014-2017 Khan Academy ()
+// Licensed under the SIL Open Font License, Version 1.1.
+// See \nhttp://scripts.sil.org/OFL
+// Very Long SVGs
+//    Many of the KaTeX stretchy wide elements use a long SVG image and an
+//    overflow: hidden tactic to achieve a stretchy image while avoiding
+//    distortion of arrowheads or brace corners.
+//    The SVG typically contains a very long (400 em) arrow.
+//    The SVG is in a container span that has overflow: hidden, so the span
+//    acts like a window that exposes only part of the  SVG.
+//    The SVG always has a longer, thinner aspect ratio than the container span.
+//    After the SVG fills 100% of the height of the container span,
+//    there is a long arrow shaft left over. That left-over shaft is not shown.
+//    Instead, it is sliced off because the span's CSS has overflow: hidden.
+//    Thus, the reader sees an arrow that matches the subject matter width
+//    without distortion.
+//    Some functions, such as \cancel, need to vary their aspect ratio. These
+//    functions do not get the overflow SVG treatment.
+// Second Brush Stroke
+//    Low resolution monitors struggle to display images in fine detail.
+//    So browsers apply anti-aliasing. A long straight arrow shaft therefore
+//    will sometimes appear as if it has a blurred edge.
+//    To mitigate this, these SVG files contain a second "brush-stroke" on the
+//    arrow shafts. That is, a second long thin rectangular SVG path has been
+//    written directly on top of each arrow shaft. This reinforcement causes
+//    some of the screen pixels to display as black instead of the anti-aliased
+//    gray pixel that a  single path would generate. So we get arrow shafts
+//    whose edges appear to be sharper.
+// In the katexImagesData object just below, the dimensions all
+// correspond to path geometry inside the relevant SVG.
+// For example, \overrightarrow uses the same arrowhead as glyph U+2192
+// from the KaTeX Main font. The scaling factor is 1000.
+// That is, inside the font, that arrowhead is 522 units tall, which
+// corresponds to 0.522 em inside the document.
+
+
+var katexImagesData = {
+  //   path(s), minWidth, height, align
+  overrightarrow: [["rightarrow"], 0.888, 522, "xMaxYMin"],
+  overleftarrow: [["leftarrow"], 0.888, 522, "xMinYMin"],
+  underrightarrow: [["rightarrow"], 0.888, 522, "xMaxYMin"],
+  underleftarrow: [["leftarrow"], 0.888, 522, "xMinYMin"],
+  xrightarrow: [["rightarrow"], 1.469, 522, "xMaxYMin"],
+  "\\cdrightarrow": [["rightarrow"], 3.0, 522, "xMaxYMin"],
+  // CD minwwidth2.5pc
+  xleftarrow: [["leftarrow"], 1.469, 522, "xMinYMin"],
+  "\\cdleftarrow": [["leftarrow"], 3.0, 522, "xMinYMin"],
+  Overrightarrow: [["doublerightarrow"], 0.888, 560, "xMaxYMin"],
+  xRightarrow: [["doublerightarrow"], 1.526, 560, "xMaxYMin"],
+  xLeftarrow: [["doubleleftarrow"], 1.526, 560, "xMinYMin"],
+  overleftharpoon: [["leftharpoon"], 0.888, 522, "xMinYMin"],
+  xleftharpoonup: [["leftharpoon"], 0.888, 522, "xMinYMin"],
+  xleftharpoondown: [["leftharpoondown"], 0.888, 522, "xMinYMin"],
+  overrightharpoon: [["rightharpoon"], 0.888, 522, "xMaxYMin"],
+  xrightharpoonup: [["rightharpoon"], 0.888, 522, "xMaxYMin"],
+  xrightharpoondown: [["rightharpoondown"], 0.888, 522, "xMaxYMin"],
+  xlongequal: [["longequal"], 0.888, 334, "xMinYMin"],
+  "\\cdlongequal": [["longequal"], 3.0, 334, "xMinYMin"],
+  xtwoheadleftarrow: [["twoheadleftarrow"], 0.888, 334, "xMinYMin"],
+  xtwoheadrightarrow: [["twoheadrightarrow"], 0.888, 334, "xMaxYMin"],
+  overleftrightarrow: [["leftarrow", "rightarrow"], 0.888, 522],
+  overbrace: [["leftbrace", "midbrace", "rightbrace"], 1.6, 548],
+  underbrace: [["leftbraceunder", "midbraceunder", "rightbraceunder"], 1.6, 548],
+  underleftrightarrow: [["leftarrow", "rightarrow"], 0.888, 522],
+  xleftrightarrow: [["leftarrow", "rightarrow"], 1.75, 522],
+  xLeftrightarrow: [["doubleleftarrow", "doublerightarrow"], 1.75, 560],
+  xrightleftharpoons: [["leftharpoondownplus", "rightharpoonplus"], 1.75, 716],
+  xleftrightharpoons: [["leftharpoonplus", "rightharpoondownplus"], 1.75, 716],
+  xhookleftarrow: [["leftarrow", "righthook"], 1.08, 522],
+  xhookrightarrow: [["lefthook", "rightarrow"], 1.08, 522],
+  overlinesegment: [["leftlinesegment", "rightlinesegment"], 0.888, 522],
+  underlinesegment: [["leftlinesegment", "rightlinesegment"], 0.888, 522],
+  overgroup: [["leftgroup", "rightgroup"], 0.888, 342],
+  undergroup: [["leftgroupunder", "rightgroupunder"], 0.888, 342],
+  xmapsto: [["leftmapsto", "rightarrow"], 1.5, 522],
+  xtofrom: [["leftToFrom", "rightToFrom"], 1.75, 528],
+  // The next three arrows are from the mhchem package.
+  // In mhchem.sty, min-length is 2.0em. But these arrows might appear in the
+  // document as \xrightarrow or \xrightleftharpoons. Those have
+  // min-length = 1.75em, so we set min-length on these next three to match.
+  xrightleftarrows: [["baraboveleftarrow", "rightarrowabovebar"], 1.75, 901],
+  xrightequilibrium: [["baraboveshortleftharpoon", "rightharpoonaboveshortbar"], 1.75, 716],
+  xleftequilibrium: [["shortbaraboveleftharpoon", "shortrightharpoonabovebar"], 1.75, 716]
+};
+
+var groupLength = function groupLength(arg) {
+  if (arg.type === "ordgroup") {
+    return arg.body.length;
+  } else {
+    return 1;
+  }
+};
+
+var svgSpan = function svgSpan(group, options) {
+  // Create a span with inline SVG for the element.
+  function buildSvgSpan_() {
+    var viewBoxWidth = 400000; // default
+
+    var label = group.label.slice(1);
+
+    if (utils.contains(["widehat", "widecheck", "widetilde", "utilde"], label)) {
+      // Each type in the `if` statement corresponds to one of the ParseNode
+      // types below. This narrowing is required to access `grp.base`.
+      // $FlowFixMe
+      var grp = group; // There are four SVG images available for each function.
+      // Choose a taller image when there are more characters.
+
+      var numChars = groupLength(grp.base);
+      var viewBoxHeight;
+      var pathName;
+
+      var _height;
+
+      if (numChars > 5) {
+        if (label === "widehat" || label === "widecheck") {
+          viewBoxHeight = 420;
+          viewBoxWidth = 2364;
+          _height = 0.42;
+          pathName = label + "4";
+        } else {
+          viewBoxHeight = 312;
+          viewBoxWidth = 2340;
+          _height = 0.34;
+          pathName = "tilde4";
+        }
+      } else {
+        var imgIndex = [1, 1, 2, 2, 3, 3][numChars];
+
+        if (label === "widehat" || label === "widecheck") {
+          viewBoxWidth = [0, 1062, 2364, 2364, 2364][imgIndex];
+          viewBoxHeight = [0, 239, 300, 360, 420][imgIndex];
+          _height = [0, 0.24, 0.3, 0.3, 0.36, 0.42][imgIndex];
+          pathName = label + imgIndex;
+        } else {
+          viewBoxWidth = [0, 600, 1033, 2339, 2340][imgIndex];
+          viewBoxHeight = [0, 260, 286, 306, 312][imgIndex];
+          _height = [0, 0.26, 0.286, 0.3, 0.306, 0.34][imgIndex];
+          pathName = "tilde" + imgIndex;
+        }
+      }
+
+      var path = new PathNode(pathName);
+      var svgNode = new SvgNode([path], {
+        "width": "100%",
+        "height": makeEm(_height),
+        "viewBox": "0 0 " + viewBoxWidth + " " + viewBoxHeight,
+        "preserveAspectRatio": "none"
+      });
+      return {
+        span: buildCommon.makeSvgSpan([], [svgNode], options),
+        minWidth: 0,
+        height: _height
+      };
+    } else {
+      var spans = [];
+      var data = katexImagesData[label];
+      var paths = data[0],
+          _minWidth = data[1],
+          _viewBoxHeight = data[2];
+
+      var _height2 = _viewBoxHeight / 1000;
+
+      var numSvgChildren = paths.length;
+      var widthClasses;
+      var aligns;
+
+      if (numSvgChildren === 1) {
+        // $FlowFixMe: All these cases must be of the 4-tuple type.
+        var align1 = data[3];
+        widthClasses = ["hide-tail"];
+        aligns = [align1];
+      } else if (numSvgChildren === 2) {
+        widthClasses = ["halfarrow-left", "halfarrow-right"];
+        aligns = ["xMinYMin", "xMaxYMin"];
+      } else if (numSvgChildren === 3) {
+        widthClasses = ["brace-left", "brace-center", "brace-right"];
+        aligns = ["xMinYMin", "xMidYMin", "xMaxYMin"];
+      } else {
+        throw new Error("Correct katexImagesData or update code here to support\n                    " + numSvgChildren + " children.");
+      }
+
+      for (var i = 0; i < numSvgChildren; i++) {
+        var _path = new PathNode(paths[i]);
+
+        var _svgNode = new SvgNode([_path], {
+          "width": "400em",
+          "height": makeEm(_height2),
+          "viewBox": "0 0 " + viewBoxWidth + " " + _viewBoxHeight,
+          "preserveAspectRatio": aligns[i] + " slice"
+        });
+
+        var _span = buildCommon.makeSvgSpan([widthClasses[i]], [_svgNode], options);
+
+        if (numSvgChildren === 1) {
+          return {
+            span: _span,
+            minWidth: _minWidth,
+            height: _height2
+          };
+        } else {
+          _span.style.height = makeEm(_height2);
+          spans.push(_span);
+        }
+      }
+
+      return {
+        span: buildCommon.makeSpan(["stretchy"], spans, options),
+        minWidth: _minWidth,
+        height: _height2
+      };
+    }
+  } // buildSvgSpan_()
+
+
+  var _buildSvgSpan_ = buildSvgSpan_(),
+      span = _buildSvgSpan_.span,
+      minWidth = _buildSvgSpan_.minWidth,
+      height = _buildSvgSpan_.height; // Note that we are returning span.depth = 0.
+  // Any adjustments relative to the baseline must be done in buildHTML.
+
+
+  span.height = height;
+  span.style.height = makeEm(height);
+
+  if (minWidth > 0) {
+    span.style.minWidth = makeEm(minWidth);
+  }
+
+  return span;
+};
+
+var encloseSpan = function encloseSpan(inner, label, topPad, bottomPad, options) {
+  // Return an image span for \cancel, \bcancel, \xcancel, \fbox, or \angl
+  var img;
+  var totalHeight = inner.height + inner.depth + topPad + bottomPad;
+
+  if (/fbox|color|angl/.test(label)) {
+    img = buildCommon.makeSpan(["stretchy", label], [], options);
+
+    if (label === "fbox") {
+      var color = options.color && options.getColor();
+
+      if (color) {
+        img.style.borderColor = color;
+      }
+    }
+  } else {
+    // \cancel, \bcancel, or \xcancel
+    // Since \cancel's SVG is inline and it omits the viewBox attribute,
+    // its stroke-width will not vary with span area.
+    var lines = [];
+
+    if (/^[bx]cancel$/.test(label)) {
+      lines.push(new LineNode({
+        "x1": "0",
+        "y1": "0",
+        "x2": "100%",
+        "y2": "100%",
+        "stroke-width": "0.046em"
+      }));
+    }
+
+    if (/^x?cancel$/.test(label)) {
+      lines.push(new LineNode({
+        "x1": "0",
+        "y1": "100%",
+        "x2": "100%",
+        "y2": "0",
+        "stroke-width": "0.046em"
+      }));
+    }
+
+    var svgNode = new SvgNode(lines, {
+      "width": "100%",
+      "height": makeEm(totalHeight)
+    });
+    img = buildCommon.makeSvgSpan([], [svgNode], options);
+  }
+
+  img.height = totalHeight;
+  img.style.height = makeEm(totalHeight);
+  return img;
+};
+
+/* harmony default export */ var stretchy = ({
+  encloseSpan: encloseSpan,
+  mathMLnode: mathMLnode,
+  svgSpan: svgSpan
+});
+;// CONCATENATED MODULE: ./src/parseNode.js
+
+
+/**
+ * Asserts that the node is of the given type and returns it with stricter
+ * typing. Throws if the node's type does not match.
+ */
+function assertNodeType(node, type) {
+  if (!node || node.type !== type) {
+    throw new Error("Expected node of type " + type + ", but got " + (node ? "node of type " + node.type : String(node)));
+  } // $FlowFixMe, >=0.125
+
+
+  return node;
+}
+/**
+ * Returns the node more strictly typed iff it is of the given type. Otherwise,
+ * returns null.
+ */
+
+function assertSymbolNodeType(node) {
+  var typedNode = checkSymbolNodeType(node);
+
+  if (!typedNode) {
+    throw new Error("Expected node of symbol group type, but got " + (node ? "node of type " + node.type : String(node)));
+  }
+
+  return typedNode;
+}
+/**
+ * Returns the node more strictly typed iff it is of the given type. Otherwise,
+ * returns null.
+ */
+
+function checkSymbolNodeType(node) {
+  if (node && (node.type === "atom" || NON_ATOMS.hasOwnProperty(node.type))) {
+    // $FlowFixMe
+    return node;
+  }
+
+  return null;
+}
+;// CONCATENATED MODULE: ./src/functions/accent.js
+
+
+
+
+
+
+
+
+
+
+// NOTE: Unlike most `htmlBuilder`s, this one handles not only "accent", but
+// also "supsub" since an accent can affect super/subscripting.
+var htmlBuilder = function htmlBuilder(grp, options) {
+  // Accents are handled in the TeXbook pg. 443, rule 12.
+  var base;
+  var group;
+  var supSubGroup;
+
+  if (grp && grp.type === "supsub") {
+    // If our base is a character box, and we have superscripts and
+    // subscripts, the supsub will defer to us. In particular, we want
+    // to attach the superscripts and subscripts to the inner body (so
+    // that the position of the superscripts and subscripts won't be
+    // affected by the height of the accent). We accomplish this by
+    // sticking the base of the accent into the base of the supsub, and
+    // rendering that, while keeping track of where the accent is.
+    // The real accent group is the base of the supsub group
+    group = assertNodeType(grp.base, "accent"); // The character box is the base of the accent group
+
+    base = group.base; // Stick the character box into the base of the supsub group
+
+    grp.base = base; // Rerender the supsub group with its new base, and store that
+    // result.
+
+    supSubGroup = assertSpan(buildGroup(grp, options)); // reset original base
+
+    grp.base = group;
+  } else {
+    group = assertNodeType(grp, "accent");
+    base = group.base;
+  } // Build the base group
+
+
+  var body = buildGroup(base, options.havingCrampedStyle()); // Does the accent need to shift for the skew of a character?
+
+  var mustShift = group.isShifty && utils.isCharacterBox(base); // Calculate the skew of the accent. This is based on the line "If the
+  // nucleus is not a single character, let s = 0; otherwise set s to the
+  // kern amount for the nucleus followed by the \skewchar of its font."
+  // Note that our skew metrics are just the kern between each character
+  // and the skewchar.
+
+  var skew = 0;
+
+  if (mustShift) {
+    // If the base is a character box, then we want the skew of the
+    // innermost character. To do that, we find the innermost character:
+    var baseChar = utils.getBaseElem(base); // Then, we render its group to get the symbol inside it
+
+    var baseGroup = buildGroup(baseChar, options.havingCrampedStyle()); // Finally, we pull the skew off of the symbol.
+
+    skew = assertSymbolDomNode(baseGroup).skew; // Note that we now throw away baseGroup, because the layers we
+    // removed with getBaseElem might contain things like \color which
+    // we can't get rid of.
+    // TODO(emily): Find a better way to get the skew
+  }
+
+  var accentBelow = group.label === "\\c"; // calculate the amount of space between the body and the accent
+
+  var clearance = accentBelow ? body.height + body.depth : Math.min(body.height, options.fontMetrics().xHeight); // Build the accent
+
+  var accentBody;
+
+  if (!group.isStretchy) {
+    var accent;
+    var width;
+
+    if (group.label === "\\vec") {
+      // Before version 0.9, \vec used the combining font glyph U+20D7.
+      // But browsers, especially Safari, are not consistent in how they
+      // render combining characters when not preceded by a character.
+      // So now we use an SVG.
+      // If Safari reforms, we should consider reverting to the glyph.
+      accent = buildCommon.staticSvg("vec", options);
+      width = buildCommon.svgData.vec[1];
+    } else {
+      accent = buildCommon.makeOrd({
+        mode: group.mode,
+        text: group.label
+      }, options, "textord");
+      accent = assertSymbolDomNode(accent); // Remove the italic correction of the accent, because it only serves to
+      // shift the accent over to a place we don't want.
+
+      accent.italic = 0;
+      width = accent.width;
+
+      if (accentBelow) {
+        clearance += accent.depth;
+      }
+    }
+
+    accentBody = buildCommon.makeSpan(["accent-body"], [accent]); // "Full" accents expand the width of the resulting symbol to be
+    // at least the width of the accent, and overlap directly onto the
+    // character without any vertical offset.
+
+    var accentFull = group.label === "\\textcircled";
+
+    if (accentFull) {
+      accentBody.classes.push('accent-full');
+      clearance = body.height;
+    } // Shift the accent over by the skew.
+
+
+    var left = skew; // CSS defines `.katex .accent .accent-body:not(.accent-full) { width: 0 }`
+    // so that the accent doesn't contribute to the bounding box.
+    // We need to shift the character by its width (effectively half
+    // its width) to compensate.
+
+    if (!accentFull) {
+      left -= width / 2;
+    }
+
+    accentBody.style.left = makeEm(left); // \textcircled uses the \bigcirc glyph, so it needs some
+    // vertical adjustment to match LaTeX.
+
+    if (group.label === "\\textcircled") {
+      accentBody.style.top = ".2em";
+    }
+
+    accentBody = buildCommon.makeVList({
+      positionType: "firstBaseline",
+      children: [{
+        type: "elem",
+        elem: body
+      }, {
+        type: "kern",
+        size: -clearance
+      }, {
+        type: "elem",
+        elem: accentBody
+      }]
+    }, options);
+  } else {
+    accentBody = stretchy.svgSpan(group, options);
+    accentBody = buildCommon.makeVList({
+      positionType: "firstBaseline",
+      children: [{
+        type: "elem",
+        elem: body
+      }, {
+        type: "elem",
+        elem: accentBody,
+        wrapperClasses: ["svg-align"],
+        wrapperStyle: skew > 0 ? {
+          width: "calc(100% - " + makeEm(2 * skew) + ")",
+          marginLeft: makeEm(2 * skew)
+        } : undefined
+      }]
+    }, options);
+  }
+
+  var accentWrap = buildCommon.makeSpan(["mord", "accent"], [accentBody], options);
+
+  if (supSubGroup) {
+    // Here, we replace the "base" child of the supsub with our newly
+    // generated accent.
+    supSubGroup.children[0] = accentWrap; // Since we don't rerun the height calculation after replacing the
+    // accent, we manually recalculate height.
+
+    supSubGroup.height = Math.max(accentWrap.height, supSubGroup.height); // Accents should always be ords, even when their innards are not.
+
+    supSubGroup.classes[0] = "mord";
+    return supSubGroup;
+  } else {
+    return accentWrap;
+  }
+};
+
+var mathmlBuilder = function mathmlBuilder(group, options) {
+  var accentNode = group.isStretchy ? stretchy.mathMLnode(group.label) : new mathMLTree.MathNode("mo", [makeText(group.label, group.mode)]);
+  var node = new mathMLTree.MathNode("mover", [buildMathML_buildGroup(group.base, options), accentNode]);
+  node.setAttribute("accent", "true");
+  return node;
+};
+
+var NON_STRETCHY_ACCENT_REGEX = new RegExp(["\\acute", "\\grave", "\\ddot", "\\tilde", "\\bar", "\\breve", "\\check", "\\hat", "\\vec", "\\dot", "\\mathring"].map(function (accent) {
+  return "\\" + accent;
+}).join("|")); // Accents
+
+defineFunction({
+  type: "accent",
+  names: ["\\acute", "\\grave", "\\ddot", "\\tilde", "\\bar", "\\breve", "\\check", "\\hat", "\\vec", "\\dot", "\\mathring", "\\widecheck", "\\widehat", "\\widetilde", "\\overrightarrow", "\\overleftarrow", "\\Overrightarrow", "\\overleftrightarrow", "\\overgroup", "\\overlinesegment", "\\overleftharpoon", "\\overrightharpoon"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(context, args) {
+    var base = normalizeArgument(args[0]);
+    var isStretchy = !NON_STRETCHY_ACCENT_REGEX.test(context.funcName);
+    var isShifty = !isStretchy || context.funcName === "\\widehat" || context.funcName === "\\widetilde" || context.funcName === "\\widecheck";
+    return {
+      type: "accent",
+      mode: context.parser.mode,
+      label: context.funcName,
+      isStretchy: isStretchy,
+      isShifty: isShifty,
+      base: base
+    };
+  },
+  htmlBuilder: htmlBuilder,
+  mathmlBuilder: mathmlBuilder
+}); // Text-mode accents
+
+defineFunction({
+  type: "accent",
+  names: ["\\'", "\\`", "\\^", "\\~", "\\=", "\\u", "\\.", '\\"', "\\c", "\\r", "\\H", "\\v", "\\textcircled"],
+  props: {
+    numArgs: 1,
+    allowedInText: true,
+    allowedInMath: true,
+    // unless in strict mode
+    argTypes: ["primitive"]
+  },
+  handler: function handler(context, args) {
+    var base = args[0];
+    var mode = context.parser.mode;
+
+    if (mode === "math") {
+      context.parser.settings.reportNonstrict("mathVsTextAccents", "LaTeX's accent " + context.funcName + " works only in text mode");
+      mode = "text";
+    }
+
+    return {
+      type: "accent",
+      mode: mode,
+      label: context.funcName,
+      isStretchy: false,
+      isShifty: true,
+      base: base
+    };
+  },
+  htmlBuilder: htmlBuilder,
+  mathmlBuilder: mathmlBuilder
+});
+;// CONCATENATED MODULE: ./src/functions/accentunder.js
+// Horizontal overlap functions
+
+
+
+
+
+
+defineFunction({
+  type: "accentUnder",
+  names: ["\\underleftarrow", "\\underrightarrow", "\\underleftrightarrow", "\\undergroup", "\\underlinesegment", "\\utilde"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var base = args[0];
+    return {
+      type: "accentUnder",
+      mode: parser.mode,
+      label: funcName,
+      base: base
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    // Treat under accents much like underlines.
+    var innerGroup = buildGroup(group.base, options);
+    var accentBody = stretchy.svgSpan(group, options);
+    var kern = group.label === "\\utilde" ? 0.12 : 0; // Generate the vlist, with the appropriate kerns
+
+    var vlist = buildCommon.makeVList({
+      positionType: "top",
+      positionData: innerGroup.height,
+      children: [{
+        type: "elem",
+        elem: accentBody,
+        wrapperClasses: ["svg-align"]
+      }, {
+        type: "kern",
+        size: kern
+      }, {
+        type: "elem",
+        elem: innerGroup
+      }]
+    }, options);
+    return buildCommon.makeSpan(["mord", "accentunder"], [vlist], options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var accentNode = stretchy.mathMLnode(group.label);
+    var node = new mathMLTree.MathNode("munder", [buildMathML_buildGroup(group.base, options), accentNode]);
+    node.setAttribute("accentunder", "true");
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/arrow.js
+
+
+
+
+
+
+
+// Helper function
+var paddedNode = function paddedNode(group) {
+  var node = new mathMLTree.MathNode("mpadded", group ? [group] : []);
+  node.setAttribute("width", "+0.6em");
+  node.setAttribute("lspace", "0.3em");
+  return node;
+}; // Stretchy arrows with an optional argument
+
+
+defineFunction({
+  type: "xArrow",
+  names: ["\\xleftarrow", "\\xrightarrow", "\\xLeftarrow", "\\xRightarrow", "\\xleftrightarrow", "\\xLeftrightarrow", "\\xhookleftarrow", "\\xhookrightarrow", "\\xmapsto", "\\xrightharpoondown", "\\xrightharpoonup", "\\xleftharpoondown", "\\xleftharpoonup", "\\xrightleftharpoons", "\\xleftrightharpoons", "\\xlongequal", "\\xtwoheadrightarrow", "\\xtwoheadleftarrow", "\\xtofrom", // The next 3 functions are here to support the mhchem extension.
+  // Direct use of these functions is discouraged and may break someday.
+  "\\xrightleftarrows", "\\xrightequilibrium", "\\xleftequilibrium", // The next 3 functions are here only to support the {CD} environment.
+  "\\\\cdrightarrow", "\\\\cdleftarrow", "\\\\cdlongequal"],
+  props: {
+    numArgs: 1,
+    numOptionalArgs: 1
+  },
+  handler: function handler(_ref, args, optArgs) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    return {
+      type: "xArrow",
+      mode: parser.mode,
+      label: funcName,
+      body: args[0],
+      below: optArgs[0]
+    };
+  },
+  // Flow is unable to correctly infer the type of `group`, even though it's
+  // unambiguously determined from the passed-in `type` above.
+  htmlBuilder: function htmlBuilder(group, options) {
+    var style = options.style; // Build the argument groups in the appropriate style.
+    // Ref: amsmath.dtx:   \hbox{$\scriptstyle\mkern#3mu{#6}\mkern#4mu$}%
+    // Some groups can return document fragments.  Handle those by wrapping
+    // them in a span.
+
+    var newOptions = options.havingStyle(style.sup());
+    var upperGroup = buildCommon.wrapFragment(buildGroup(group.body, newOptions, options), options);
+    var arrowPrefix = group.label.slice(0, 2) === "\\x" ? "x" : "cd";
+    upperGroup.classes.push(arrowPrefix + "-arrow-pad");
+    var lowerGroup;
+
+    if (group.below) {
+      // Build the lower group
+      newOptions = options.havingStyle(style.sub());
+      lowerGroup = buildCommon.wrapFragment(buildGroup(group.below, newOptions, options), options);
+      lowerGroup.classes.push(arrowPrefix + "-arrow-pad");
+    }
+
+    var arrowBody = stretchy.svgSpan(group, options); // Re shift: Note that stretchy.svgSpan returned arrowBody.depth = 0.
+    // The point we want on the math axis is at 0.5 * arrowBody.height.
+
+    var arrowShift = -options.fontMetrics().axisHeight + 0.5 * arrowBody.height; // 2 mu kern. Ref: amsmath.dtx: #7\if0#2\else\mkern#2mu\fi
+
+    var upperShift = -options.fontMetrics().axisHeight - 0.5 * arrowBody.height - 0.111; // 0.111 em = 2 mu
+
+    if (upperGroup.depth > 0.25 || group.label === "\\xleftequilibrium") {
+      upperShift -= upperGroup.depth; // shift up if depth encroaches
+    } // Generate the vlist
+
+
+    var vlist;
+
+    if (lowerGroup) {
+      var lowerShift = -options.fontMetrics().axisHeight + lowerGroup.height + 0.5 * arrowBody.height + 0.111;
+      vlist = buildCommon.makeVList({
+        positionType: "individualShift",
+        children: [{
+          type: "elem",
+          elem: upperGroup,
+          shift: upperShift
+        }, {
+          type: "elem",
+          elem: arrowBody,
+          shift: arrowShift
+        }, {
+          type: "elem",
+          elem: lowerGroup,
+          shift: lowerShift
+        }]
+      }, options);
+    } else {
+      vlist = buildCommon.makeVList({
+        positionType: "individualShift",
+        children: [{
+          type: "elem",
+          elem: upperGroup,
+          shift: upperShift
+        }, {
+          type: "elem",
+          elem: arrowBody,
+          shift: arrowShift
+        }]
+      }, options);
+    } // $FlowFixMe: Replace this with passing "svg-align" into makeVList.
+
+
+    vlist.children[0].children[0].children[1].classes.push("svg-align");
+    return buildCommon.makeSpan(["mrel", "x-arrow"], [vlist], options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var arrowNode = stretchy.mathMLnode(group.label);
+    arrowNode.setAttribute("minsize", group.label.charAt(0) === "x" ? "1.75em" : "3.0em");
+    var node;
+
+    if (group.body) {
+      var upperNode = paddedNode(buildMathML_buildGroup(group.body, options));
+
+      if (group.below) {
+        var lowerNode = paddedNode(buildMathML_buildGroup(group.below, options));
+        node = new mathMLTree.MathNode("munderover", [arrowNode, lowerNode, upperNode]);
+      } else {
+        node = new mathMLTree.MathNode("mover", [arrowNode, upperNode]);
+      }
+    } else if (group.below) {
+      var _lowerNode = paddedNode(buildMathML_buildGroup(group.below, options));
+
+      node = new mathMLTree.MathNode("munder", [arrowNode, _lowerNode]);
+    } else {
+      // This should never happen.
+      // Parser.js throws an error if there is no argument.
+      node = paddedNode();
+      node = new mathMLTree.MathNode("mover", [arrowNode, node]);
+    }
+
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/mclass.js
+
+
+
+
+
+
+var mclass_makeSpan = buildCommon.makeSpan;
+
+function mclass_htmlBuilder(group, options) {
+  var elements = buildExpression(group.body, options, true);
+  return mclass_makeSpan([group.mclass], elements, options);
+}
+
+function mclass_mathmlBuilder(group, options) {
+  var node;
+  var inner = buildMathML_buildExpression(group.body, options);
+
+  if (group.mclass === "minner") {
+    node = new mathMLTree.MathNode("mpadded", inner);
+  } else if (group.mclass === "mord") {
+    if (group.isCharacterBox) {
+      node = inner[0];
+      node.type = "mi";
+    } else {
+      node = new mathMLTree.MathNode("mi", inner);
+    }
+  } else {
+    if (group.isCharacterBox) {
+      node = inner[0];
+      node.type = "mo";
+    } else {
+      node = new mathMLTree.MathNode("mo", inner);
+    } // Set spacing based on what is the most likely adjacent atom type.
+    // See TeXbook p170.
+
+
+    if (group.mclass === "mbin") {
+      node.attributes.lspace = "0.22em"; // medium space
+
+      node.attributes.rspace = "0.22em";
+    } else if (group.mclass === "mpunct") {
+      node.attributes.lspace = "0em";
+      node.attributes.rspace = "0.17em"; // thinspace
+    } else if (group.mclass === "mopen" || group.mclass === "mclose") {
+      node.attributes.lspace = "0em";
+      node.attributes.rspace = "0em";
+    } else if (group.mclass === "minner") {
+      node.attributes.lspace = "0.0556em"; // 1 mu is the most likely option
+
+      node.attributes.width = "+0.1111em";
+    } // MathML  default space is 5/18 em, so  needs no action.
+    // Ref: https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mo
+
+  }
+
+  return node;
+} // Math class commands except \mathop
+
+
+defineFunction({
+  type: "mclass",
+  names: ["\\mathord", "\\mathbin", "\\mathrel", "\\mathopen", "\\mathclose", "\\mathpunct", "\\mathinner"],
+  props: {
+    numArgs: 1,
+    primitive: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var body = args[0];
+    return {
+      type: "mclass",
+      mode: parser.mode,
+      mclass: "m" + funcName.slice(5),
+      // TODO(kevinb): don't prefix with 'm'
+      body: ordargument(body),
+      isCharacterBox: utils.isCharacterBox(body)
+    };
+  },
+  htmlBuilder: mclass_htmlBuilder,
+  mathmlBuilder: mclass_mathmlBuilder
+});
+var binrelClass = function binrelClass(arg) {
+  // \binrel@ spacing varies with (bin|rel|ord) of the atom in the argument.
+  // (by rendering separately and with {}s before and after, and measuring
+  // the change in spacing).  We'll do roughly the same by detecting the
+  // atom type directly.
+  var atom = arg.type === "ordgroup" && arg.body.length ? arg.body[0] : arg;
+
+  if (atom.type === "atom" && (atom.family === "bin" || atom.family === "rel")) {
+    return "m" + atom.family;
+  } else {
+    return "mord";
+  }
+}; // \@binrel{x}{y} renders like y but as mbin/mrel/mord if x is mbin/mrel/mord.
+// This is equivalent to \binrel@{x}\binrel@@{y} in AMSTeX.
+
+defineFunction({
+  type: "mclass",
+  names: ["\\@binrel"],
+  props: {
+    numArgs: 2
+  },
+  handler: function handler(_ref2, args) {
+    var parser = _ref2.parser;
+    return {
+      type: "mclass",
+      mode: parser.mode,
+      mclass: binrelClass(args[0]),
+      body: ordargument(args[1]),
+      isCharacterBox: utils.isCharacterBox(args[1])
+    };
+  }
+}); // Build a relation or stacked op by placing one symbol on top of another
+
+defineFunction({
+  type: "mclass",
+  names: ["\\stackrel", "\\overset", "\\underset"],
+  props: {
+    numArgs: 2
+  },
+  handler: function handler(_ref3, args) {
+    var parser = _ref3.parser,
+        funcName = _ref3.funcName;
+    var baseArg = args[1];
+    var shiftedArg = args[0];
+    var mclass;
+
+    if (funcName !== "\\stackrel") {
+      // LaTeX applies \binrel spacing to \overset and \underset.
+      mclass = binrelClass(baseArg);
+    } else {
+      mclass = "mrel"; // for \stackrel
+    }
+
+    var baseOp = {
+      type: "op",
+      mode: baseArg.mode,
+      limits: true,
+      alwaysHandleSupSub: true,
+      parentIsSupSub: false,
+      symbol: false,
+      suppressBaseShift: funcName !== "\\stackrel",
+      body: ordargument(baseArg)
+    };
+    var supsub = {
+      type: "supsub",
+      mode: shiftedArg.mode,
+      base: baseOp,
+      sup: funcName === "\\underset" ? null : shiftedArg,
+      sub: funcName === "\\underset" ? shiftedArg : null
+    };
+    return {
+      type: "mclass",
+      mode: parser.mode,
+      mclass: mclass,
+      body: [supsub],
+      isCharacterBox: utils.isCharacterBox(supsub)
+    };
+  },
+  htmlBuilder: mclass_htmlBuilder,
+  mathmlBuilder: mclass_mathmlBuilder
+});
+;// CONCATENATED MODULE: ./src/functions/pmb.js
+
+
+
+
+
+
+// \pmb is a simulation of bold font.
+// The version of \pmb in ambsy.sty works by typesetting three copies
+// with small offsets. We use CSS text-shadow.
+// It's a hack. Not as good as a real bold font. Better than nothing.
+defineFunction({
+  type: "pmb",
+  names: ["\\pmb"],
+  props: {
+    numArgs: 1,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    return {
+      type: "pmb",
+      mode: parser.mode,
+      mclass: binrelClass(args[0]),
+      body: ordargument(args[0])
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var elements = buildExpression(group.body, options, true);
+    var node = buildCommon.makeSpan([group.mclass], elements, options);
+    node.style.textShadow = "0.02em 0.01em 0.04px";
+    return node;
+  },
+  mathmlBuilder: function mathmlBuilder(group, style) {
+    var inner = buildMathML_buildExpression(group.body, style); // Wrap with an  element.
+
+    var node = new mathMLTree.MathNode("mstyle", inner);
+    node.setAttribute("style", "text-shadow: 0.02em 0.01em 0.04px");
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/environments/cd.js
+
+
+
+
+
+
+
+
+var cdArrowFunctionName = {
+  ">": "\\\\cdrightarrow",
+  "<": "\\\\cdleftarrow",
+  "=": "\\\\cdlongequal",
+  "A": "\\uparrow",
+  "V": "\\downarrow",
+  "|": "\\Vert",
+  ".": "no arrow"
+};
+
+var newCell = function newCell() {
+  // Create an empty cell, to be filled below with parse nodes.
+  // The parseTree from this module must be constructed like the
+  // one created by parseArray(), so an empty CD cell must
+  // be a ParseNode<"styling">. And CD is always displaystyle.
+  // So these values are fixed and flow can do implicit typing.
+  return {
+    type: "styling",
+    body: [],
+    mode: "math",
+    style: "display"
+  };
+};
+
+var isStartOfArrow = function isStartOfArrow(node) {
+  return node.type === "textord" && node.text === "@";
+};
+
+var isLabelEnd = function isLabelEnd(node, endChar) {
+  return (node.type === "mathord" || node.type === "atom") && node.text === endChar;
+};
+
+function cdArrow(arrowChar, labels, parser) {
+  // Return a parse tree of an arrow and its labels.
+  // This acts in a way similar to a macro expansion.
+  var funcName = cdArrowFunctionName[arrowChar];
+
+  switch (funcName) {
+    case "\\\\cdrightarrow":
+    case "\\\\cdleftarrow":
+      return parser.callFunction(funcName, [labels[0]], [labels[1]]);
+
+    case "\\uparrow":
+    case "\\downarrow":
+      {
+        var leftLabel = parser.callFunction("\\\\cdleft", [labels[0]], []);
+        var bareArrow = {
+          type: "atom",
+          text: funcName,
+          mode: "math",
+          family: "rel"
+        };
+        var sizedArrow = parser.callFunction("\\Big", [bareArrow], []);
+        var rightLabel = parser.callFunction("\\\\cdright", [labels[1]], []);
+        var arrowGroup = {
+          type: "ordgroup",
+          mode: "math",
+          body: [leftLabel, sizedArrow, rightLabel]
+        };
+        return parser.callFunction("\\\\cdparent", [arrowGroup], []);
+      }
+
+    case "\\\\cdlongequal":
+      return parser.callFunction("\\\\cdlongequal", [], []);
+
+    case "\\Vert":
+      {
+        var arrow = {
+          type: "textord",
+          text: "\\Vert",
+          mode: "math"
+        };
+        return parser.callFunction("\\Big", [arrow], []);
+      }
+
+    default:
+      return {
+        type: "textord",
+        text: " ",
+        mode: "math"
+      };
+  }
+}
+
+function parseCD(parser) {
+  // Get the array's parse nodes with \\ temporarily mapped to \cr.
+  var parsedRows = [];
+  parser.gullet.beginGroup();
+  parser.gullet.macros.set("\\cr", "\\\\\\relax");
+  parser.gullet.beginGroup();
+
+  while (true) {
+    // eslint-disable-line no-constant-condition
+    // Get the parse nodes for the next row.
+    parsedRows.push(parser.parseExpression(false, "\\\\"));
+    parser.gullet.endGroup();
+    parser.gullet.beginGroup();
+    var next = parser.fetch().text;
+
+    if (next === "&" || next === "\\\\") {
+      parser.consume();
+    } else if (next === "\\end") {
+      if (parsedRows[parsedRows.length - 1].length === 0) {
+        parsedRows.pop(); // final row ended in \\
+      }
+
+      break;
+    } else {
+      throw new src_ParseError("Expected \\\\ or \\cr or \\end", parser.nextToken);
+    }
+  }
+
+  var row = [];
+  var body = [row]; // Loop thru the parse nodes. Collect them into cells and arrows.
+
+  for (var i = 0; i < parsedRows.length; i++) {
+    // Start a new row.
+    var rowNodes = parsedRows[i]; // Create the first cell.
+
+    var cell = newCell();
+
+    for (var j = 0; j < rowNodes.length; j++) {
+      if (!isStartOfArrow(rowNodes[j])) {
+        // If a parseNode is not an arrow, it goes into a cell.
+        cell.body.push(rowNodes[j]);
+      } else {
+        // Parse node j is an "@", the start of an arrow.
+        // Before starting on the arrow, push the cell into `row`.
+        row.push(cell); // Now collect parseNodes into an arrow.
+        // The character after "@" defines the arrow type.
+
+        j += 1;
+        var arrowChar = assertSymbolNodeType(rowNodes[j]).text; // Create two empty label nodes. We may or may not use them.
+
+        var labels = new Array(2);
+        labels[0] = {
+          type: "ordgroup",
+          mode: "math",
+          body: []
+        };
+        labels[1] = {
+          type: "ordgroup",
+          mode: "math",
+          body: []
+        }; // Process the arrow.
+
+        if ("=|.".indexOf(arrowChar) > -1) {// Three "arrows", ``@=`, `@|`, and `@.`, do not take labels.
+          // Do nothing here.
+        } else if ("<>AV".indexOf(arrowChar) > -1) {
+          // Four arrows, `@>>>`, `@<<<`, `@AAA`, and `@VVV`, each take
+          // two optional labels. E.g. the right-point arrow syntax is
+          // really:  @>{optional label}>{optional label}>
+          // Collect parseNodes into labels.
+          for (var labelNum = 0; labelNum < 2; labelNum++) {
+            var inLabel = true;
+
+            for (var k = j + 1; k < rowNodes.length; k++) {
+              if (isLabelEnd(rowNodes[k], arrowChar)) {
+                inLabel = false;
+                j = k;
+                break;
+              }
+
+              if (isStartOfArrow(rowNodes[k])) {
+                throw new src_ParseError("Missing a " + arrowChar + " character to complete a CD arrow.", rowNodes[k]);
+              }
+
+              labels[labelNum].body.push(rowNodes[k]);
+            }
+
+            if (inLabel) {
+              // isLabelEnd never returned a true.
+              throw new src_ParseError("Missing a " + arrowChar + " character to complete a CD arrow.", rowNodes[j]);
+            }
+          }
+        } else {
+          throw new src_ParseError("Expected one of \"<>AV=|.\" after @", rowNodes[j]);
+        } // Now join the arrow to its labels.
+
+
+        var arrow = cdArrow(arrowChar, labels, parser); // Wrap the arrow in  ParseNode<"styling">.
+        // This is done to match parseArray() behavior.
+
+        var wrappedArrow = {
+          type: "styling",
+          body: [arrow],
+          mode: "math",
+          style: "display" // CD is always displaystyle.
+
+        };
+        row.push(wrappedArrow); // In CD's syntax, cells are implicit. That is, everything that
+        // is not an arrow gets collected into a cell. So create an empty
+        // cell now. It will collect upcoming parseNodes.
+
+        cell = newCell();
+      }
+    }
+
+    if (i % 2 === 0) {
+      // Even-numbered rows consist of: cell, arrow, cell, arrow, ... cell
+      // The last cell is not yet pushed into `row`, so:
+      row.push(cell);
+    } else {
+      // Odd-numbered rows consist of: vert arrow, empty cell, ... vert arrow
+      // Remove the empty cell that was placed at the beginning of `row`.
+      row.shift();
+    }
+
+    row = [];
+    body.push(row);
+  } // End row group
+
+
+  parser.gullet.endGroup(); // End array group defining \\
+
+  parser.gullet.endGroup(); // define column separation.
+
+  var cols = new Array(body[0].length).fill({
+    type: "align",
+    align: "c",
+    pregap: 0.25,
+    // CD package sets \enskip between columns.
+    postgap: 0.25 // So pre and post each get half an \enskip, i.e. 0.25em.
+
+  });
+  return {
+    type: "array",
+    mode: "math",
+    body: body,
+    arraystretch: 1,
+    addJot: true,
+    rowGaps: [null],
+    cols: cols,
+    colSeparationType: "CD",
+    hLinesBeforeRow: new Array(body.length + 1).fill([])
+  };
+} // The functions below are not available for general use.
+// They are here only for internal use by the {CD} environment in placing labels
+// next to vertical arrows.
+// We don't need any such functions for horizontal arrows because we can reuse
+// the functionality that already exists for extensible arrows.
+
+defineFunction({
+  type: "cdlabel",
+  names: ["\\\\cdleft", "\\\\cdright"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    return {
+      type: "cdlabel",
+      mode: parser.mode,
+      side: funcName.slice(4),
+      label: args[0]
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var newOptions = options.havingStyle(options.style.sup());
+    var label = buildCommon.wrapFragment(buildGroup(group.label, newOptions, options), options);
+    label.classes.push("cd-label-" + group.side);
+    label.style.bottom = makeEm(0.8 - label.depth); // Zero out label height & depth, so vertical align of arrow is set
+    // by the arrow height, not by the label.
+
+    label.height = 0;
+    label.depth = 0;
+    return label;
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var label = new mathMLTree.MathNode("mrow", [buildMathML_buildGroup(group.label, options)]);
+    label = new mathMLTree.MathNode("mpadded", [label]);
+    label.setAttribute("width", "0");
+
+    if (group.side === "left") {
+      label.setAttribute("lspace", "-1width");
+    } // We have to guess at vertical alignment. We know the arrow is 1.8em tall,
+    // But we don't know the height or depth of the label.
+
+
+    label.setAttribute("voffset", "0.7em");
+    label = new mathMLTree.MathNode("mstyle", [label]);
+    label.setAttribute("displaystyle", "false");
+    label.setAttribute("scriptlevel", "1");
+    return label;
+  }
+});
+defineFunction({
+  type: "cdlabelparent",
+  names: ["\\\\cdparent"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(_ref2, args) {
+    var parser = _ref2.parser;
+    return {
+      type: "cdlabelparent",
+      mode: parser.mode,
+      fragment: args[0]
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    // Wrap the vertical arrow and its labels.
+    // The parent gets position: relative. The child gets position: absolute.
+    // So CSS can locate the label correctly.
+    var parent = buildCommon.wrapFragment(buildGroup(group.fragment, options), options);
+    parent.classes.push("cd-vert-arrow");
+    return parent;
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    return new mathMLTree.MathNode("mrow", [buildMathML_buildGroup(group.fragment, options)]);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/char.js
+
+
+ // \@char is an internal function that takes a grouped decimal argument like
+// {123} and converts into symbol with code 123.  It is used by the *macro*
+// \char defined in macros.js.
+
+defineFunction({
+  type: "textord",
+  names: ["\\@char"],
+  props: {
+    numArgs: 1,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    var arg = assertNodeType(args[0], "ordgroup");
+    var group = arg.body;
+    var number = "";
+
+    for (var i = 0; i < group.length; i++) {
+      var node = assertNodeType(group[i], "textord");
+      number += node.text;
+    }
+
+    var code = parseInt(number);
+    var text;
+
+    if (isNaN(code)) {
+      throw new src_ParseError("\\@char has non-numeric argument " + number); // If we drop IE support, the following code could be replaced with
+      // text = String.fromCodePoint(code)
+    } else if (code < 0 || code >= 0x10ffff) {
+      throw new src_ParseError("\\@char with invalid code point " + number);
+    } else if (code <= 0xffff) {
+      text = String.fromCharCode(code);
+    } else {
+      // Astral code point; split into surrogate halves
+      code -= 0x10000;
+      text = String.fromCharCode((code >> 10) + 0xd800, (code & 0x3ff) + 0xdc00);
+    }
+
+    return {
+      type: "textord",
+      mode: parser.mode,
+      text: text
+    };
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/color.js
+
+
+
+
+
+
+
+var color_htmlBuilder = function htmlBuilder(group, options) {
+  var elements = buildExpression(group.body, options.withColor(group.color), false); // \color isn't supposed to affect the type of the elements it contains.
+  // To accomplish this, we wrap the results in a fragment, so the inner
+  // elements will be able to directly interact with their neighbors. For
+  // example, `\color{red}{2 +} 3` has the same spacing as `2 + 3`
+
+  return buildCommon.makeFragment(elements);
+};
+
+var color_mathmlBuilder = function mathmlBuilder(group, options) {
+  var inner = buildMathML_buildExpression(group.body, options.withColor(group.color));
+  var node = new mathMLTree.MathNode("mstyle", inner);
+  node.setAttribute("mathcolor", group.color);
+  return node;
+};
+
+defineFunction({
+  type: "color",
+  names: ["\\textcolor"],
+  props: {
+    numArgs: 2,
+    allowedInText: true,
+    argTypes: ["color", "original"]
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    var color = assertNodeType(args[0], "color-token").color;
+    var body = args[1];
+    return {
+      type: "color",
+      mode: parser.mode,
+      color: color,
+      body: ordargument(body)
+    };
+  },
+  htmlBuilder: color_htmlBuilder,
+  mathmlBuilder: color_mathmlBuilder
+});
+defineFunction({
+  type: "color",
+  names: ["\\color"],
+  props: {
+    numArgs: 1,
+    allowedInText: true,
+    argTypes: ["color"]
+  },
+  handler: function handler(_ref2, args) {
+    var parser = _ref2.parser,
+        breakOnTokenText = _ref2.breakOnTokenText;
+    var color = assertNodeType(args[0], "color-token").color; // Set macro \current@color in current namespace to store the current
+    // color, mimicking the behavior of color.sty.
+    // This is currently used just to correctly color a \right
+    // that follows a \color command.
+
+    parser.gullet.macros.set("\\current@color", color); // Parse out the implicit body that should be colored.
+
+    var body = parser.parseExpression(true, breakOnTokenText);
+    return {
+      type: "color",
+      mode: parser.mode,
+      color: color,
+      body: body
+    };
+  },
+  htmlBuilder: color_htmlBuilder,
+  mathmlBuilder: color_mathmlBuilder
+});
+;// CONCATENATED MODULE: ./src/functions/cr.js
+// Row breaks within tabular environments, and line breaks at top level
+
+
+
+
+ // \DeclareRobustCommand\\{...\@xnewline}
+
+defineFunction({
+  type: "cr",
+  names: ["\\\\"],
+  props: {
+    numArgs: 0,
+    numOptionalArgs: 0,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args, optArgs) {
+    var parser = _ref.parser;
+    var size = parser.gullet.future().text === "[" ? parser.parseSizeGroup(true) : null;
+    var newLine = !parser.settings.displayMode || !parser.settings.useStrictBehavior("newLineInDisplayMode", "In LaTeX, \\\\ or \\newline " + "does nothing in display mode");
+    return {
+      type: "cr",
+      mode: parser.mode,
+      newLine: newLine,
+      size: size && assertNodeType(size, "size").value
+    };
+  },
+  // The following builders are called only at the top level,
+  // not within tabular/array environments.
+  htmlBuilder: function htmlBuilder(group, options) {
+    var span = buildCommon.makeSpan(["mspace"], [], options);
+
+    if (group.newLine) {
+      span.classes.push("newline");
+
+      if (group.size) {
+        span.style.marginTop = makeEm(calculateSize(group.size, options));
+      }
+    }
+
+    return span;
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var node = new mathMLTree.MathNode("mspace");
+
+    if (group.newLine) {
+      node.setAttribute("linebreak", "newline");
+
+      if (group.size) {
+        node.setAttribute("height", makeEm(calculateSize(group.size, options)));
+      }
+    }
+
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/def.js
+
+
+
+var globalMap = {
+  "\\global": "\\global",
+  "\\long": "\\\\globallong",
+  "\\\\globallong": "\\\\globallong",
+  "\\def": "\\gdef",
+  "\\gdef": "\\gdef",
+  "\\edef": "\\xdef",
+  "\\xdef": "\\xdef",
+  "\\let": "\\\\globallet",
+  "\\futurelet": "\\\\globalfuture"
+};
+
+var checkControlSequence = function checkControlSequence(tok) {
+  var name = tok.text;
+
+  if (/^(?:[\\{}$&#^_]|EOF)$/.test(name)) {
+    throw new src_ParseError("Expected a control sequence", tok);
+  }
+
+  return name;
+};
+
+var getRHS = function getRHS(parser) {
+  var tok = parser.gullet.popToken();
+
+  if (tok.text === "=") {
+    // consume optional equals
+    tok = parser.gullet.popToken();
+
+    if (tok.text === " ") {
+      // consume one optional space
+      tok = parser.gullet.popToken();
+    }
+  }
+
+  return tok;
+};
+
+var letCommand = function letCommand(parser, name, tok, global) {
+  var macro = parser.gullet.macros.get(tok.text);
+
+  if (macro == null) {
+    // don't expand it later even if a macro with the same name is defined
+    // e.g., \let\foo=\frac \def\frac{\relax} \frac12
+    tok.noexpand = true;
+    macro = {
+      tokens: [tok],
+      numArgs: 0,
+      // reproduce the same behavior in expansion
+      unexpandable: !parser.gullet.isExpandable(tok.text)
+    };
+  }
+
+  parser.gullet.macros.set(name, macro, global);
+}; //  -> |
+//  -> |\global
+//  -> |
+//  -> \global|\long|\outer
+
+
+defineFunction({
+  type: "internal",
+  names: ["\\global", "\\long", "\\\\globallong" // can’t be entered directly
+  ],
+  props: {
+    numArgs: 0,
+    allowedInText: true
+  },
+  handler: function handler(_ref) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    parser.consumeSpaces();
+    var token = parser.fetch();
+
+    if (globalMap[token.text]) {
+      // KaTeX doesn't have \par, so ignore \long
+      if (funcName === "\\global" || funcName === "\\\\globallong") {
+        token.text = globalMap[token.text];
+      }
+
+      return assertNodeType(parser.parseFunction(), "internal");
+    }
+
+    throw new src_ParseError("Invalid token after macro prefix", token);
+  }
+}); // Basic support for macro definitions: \def, \gdef, \edef, \xdef
+//  -> 
+//  -> \def|\gdef|\edef|\xdef
+//  -> 
+
+defineFunction({
+  type: "internal",
+  names: ["\\def", "\\gdef", "\\edef", "\\xdef"],
+  props: {
+    numArgs: 0,
+    allowedInText: true,
+    primitive: true
+  },
+  handler: function handler(_ref2) {
+    var parser = _ref2.parser,
+        funcName = _ref2.funcName;
+    var tok = parser.gullet.popToken();
+    var name = tok.text;
+
+    if (/^(?:[\\{}$&#^_]|EOF)$/.test(name)) {
+      throw new src_ParseError("Expected a control sequence", tok);
+    }
+
+    var numArgs = 0;
+    var insert;
+    var delimiters = [[]]; //  contains no braces
+
+    while (parser.gullet.future().text !== "{") {
+      tok = parser.gullet.popToken();
+
+      if (tok.text === "#") {
+        // If the very last character of the  is #, so that
+        // this # is immediately followed by {, TeX will behave as if the {
+        // had been inserted at the right end of both the parameter text
+        // and the replacement text.
+        if (parser.gullet.future().text === "{") {
+          insert = parser.gullet.future();
+          delimiters[numArgs].push("{");
+          break;
+        } // A parameter, the first appearance of # must be followed by 1,
+        // the next by 2, and so on; up to nine #’s are allowed
+
+
+        tok = parser.gullet.popToken();
+
+        if (!/^[1-9]$/.test(tok.text)) {
+          throw new src_ParseError("Invalid argument number \"" + tok.text + "\"");
+        }
+
+        if (parseInt(tok.text) !== numArgs + 1) {
+          throw new src_ParseError("Argument number \"" + tok.text + "\" out of order");
+        }
+
+        numArgs++;
+        delimiters.push([]);
+      } else if (tok.text === "EOF") {
+        throw new src_ParseError("Expected a macro definition");
+      } else {
+        delimiters[numArgs].push(tok.text);
+      }
+    } // replacement text, enclosed in '{' and '}' and properly nested
+
+
+    var _parser$gullet$consum = parser.gullet.consumeArg(),
+        tokens = _parser$gullet$consum.tokens;
+
+    if (insert) {
+      tokens.unshift(insert);
+    }
+
+    if (funcName === "\\edef" || funcName === "\\xdef") {
+      tokens = parser.gullet.expandTokens(tokens);
+      tokens.reverse(); // to fit in with stack order
+    } // Final arg is the expansion of the macro
+
+
+    parser.gullet.macros.set(name, {
+      tokens: tokens,
+      numArgs: numArgs,
+      delimiters: delimiters
+    }, funcName === globalMap[funcName]);
+    return {
+      type: "internal",
+      mode: parser.mode
+    };
+  }
+}); //  -> 
+//  -> \futurelet
+//     | \let
+//  -> |=
+
+defineFunction({
+  type: "internal",
+  names: ["\\let", "\\\\globallet" // can’t be entered directly
+  ],
+  props: {
+    numArgs: 0,
+    allowedInText: true,
+    primitive: true
+  },
+  handler: function handler(_ref3) {
+    var parser = _ref3.parser,
+        funcName = _ref3.funcName;
+    var name = checkControlSequence(parser.gullet.popToken());
+    parser.gullet.consumeSpaces();
+    var tok = getRHS(parser);
+    letCommand(parser, name, tok, funcName === "\\\\globallet");
+    return {
+      type: "internal",
+      mode: parser.mode
+    };
+  }
+}); // ref: https://www.tug.org/TUGboat/tb09-3/tb22bechtolsheim.pdf
+
+defineFunction({
+  type: "internal",
+  names: ["\\futurelet", "\\\\globalfuture" // can’t be entered directly
+  ],
+  props: {
+    numArgs: 0,
+    allowedInText: true,
+    primitive: true
+  },
+  handler: function handler(_ref4) {
+    var parser = _ref4.parser,
+        funcName = _ref4.funcName;
+    var name = checkControlSequence(parser.gullet.popToken());
+    var middle = parser.gullet.popToken();
+    var tok = parser.gullet.popToken();
+    letCommand(parser, name, tok, funcName === "\\\\globalfuture");
+    parser.gullet.pushToken(tok);
+    parser.gullet.pushToken(middle);
+    return {
+      type: "internal",
+      mode: parser.mode
+    };
+  }
+});
+;// CONCATENATED MODULE: ./src/delimiter.js
+/**
+ * This file deals with creating delimiters of various sizes. The TeXbook
+ * discusses these routines on page 441-442, in the "Another subroutine sets box
+ * x to a specified variable delimiter" paragraph.
+ *
+ * There are three main routines here. `makeSmallDelim` makes a delimiter in the
+ * normal font, but in either text, script, or scriptscript style.
+ * `makeLargeDelim` makes a delimiter in textstyle, but in one of the Size1,
+ * Size2, Size3, or Size4 fonts. `makeStackedDelim` makes a delimiter out of
+ * smaller pieces that are stacked on top of one another.
+ *
+ * The functions take a parameter `center`, which determines if the delimiter
+ * should be centered around the axis.
+ *
+ * Then, there are three exposed functions. `sizedDelim` makes a delimiter in
+ * one of the given sizes. This is used for things like `\bigl`.
+ * `customSizedDelim` makes a delimiter with a given total height+depth. It is
+ * called in places like `\sqrt`. `leftRightDelim` makes an appropriate
+ * delimiter which surrounds an expression of a given height an depth. It is
+ * used in `\left` and `\right`.
+ */
+
+
+
+
+
+
+
+
+
+
+
+/**
+ * Get the metrics for a given symbol and font, after transformation (i.e.
+ * after following replacement from symbols.js)
+ */
+var getMetrics = function getMetrics(symbol, font, mode) {
+  var replace = src_symbols.math[symbol] && src_symbols.math[symbol].replace;
+  var metrics = getCharacterMetrics(replace || symbol, font, mode);
+
+  if (!metrics) {
+    throw new Error("Unsupported symbol " + symbol + " and font size " + font + ".");
+  }
+
+  return metrics;
+};
+/**
+ * Puts a delimiter span in a given style, and adds appropriate height, depth,
+ * and maxFontSizes.
+ */
+
+
+var styleWrap = function styleWrap(delim, toStyle, options, classes) {
+  var newOptions = options.havingBaseStyle(toStyle);
+  var span = buildCommon.makeSpan(classes.concat(newOptions.sizingClasses(options)), [delim], options);
+  var delimSizeMultiplier = newOptions.sizeMultiplier / options.sizeMultiplier;
+  span.height *= delimSizeMultiplier;
+  span.depth *= delimSizeMultiplier;
+  span.maxFontSize = newOptions.sizeMultiplier;
+  return span;
+};
+
+var centerSpan = function centerSpan(span, options, style) {
+  var newOptions = options.havingBaseStyle(style);
+  var shift = (1 - options.sizeMultiplier / newOptions.sizeMultiplier) * options.fontMetrics().axisHeight;
+  span.classes.push("delimcenter");
+  span.style.top = makeEm(shift);
+  span.height -= shift;
+  span.depth += shift;
+};
+/**
+ * Makes a small delimiter. This is a delimiter that comes in the Main-Regular
+ * font, but is restyled to either be in textstyle, scriptstyle, or
+ * scriptscriptstyle.
+ */
+
+
+var makeSmallDelim = function makeSmallDelim(delim, style, center, options, mode, classes) {
+  var text = buildCommon.makeSymbol(delim, "Main-Regular", mode, options);
+  var span = styleWrap(text, style, options, classes);
+
+  if (center) {
+    centerSpan(span, options, style);
+  }
+
+  return span;
+};
+/**
+ * Builds a symbol in the given font size (note size is an integer)
+ */
+
+
+var mathrmSize = function mathrmSize(value, size, mode, options) {
+  return buildCommon.makeSymbol(value, "Size" + size + "-Regular", mode, options);
+};
+/**
+ * Makes a large delimiter. This is a delimiter that comes in the Size1, Size2,
+ * Size3, or Size4 fonts. It is always rendered in textstyle.
+ */
+
+
+var makeLargeDelim = function makeLargeDelim(delim, size, center, options, mode, classes) {
+  var inner = mathrmSize(delim, size, mode, options);
+  var span = styleWrap(buildCommon.makeSpan(["delimsizing", "size" + size], [inner], options), src_Style.TEXT, options, classes);
+
+  if (center) {
+    centerSpan(span, options, src_Style.TEXT);
+  }
+
+  return span;
+};
+/**
+ * Make a span from a font glyph with the given offset and in the given font.
+ * This is used in makeStackedDelim to make the stacking pieces for the delimiter.
+ */
+
+
+var makeGlyphSpan = function makeGlyphSpan(symbol, font, mode) {
+  var sizeClass; // Apply the correct CSS class to choose the right font.
+
+  if (font === "Size1-Regular") {
+    sizeClass = "delim-size1";
+  } else
+    /* if (font === "Size4-Regular") */
+    {
+      sizeClass = "delim-size4";
+    }
+
+  var corner = buildCommon.makeSpan(["delimsizinginner", sizeClass], [buildCommon.makeSpan([], [buildCommon.makeSymbol(symbol, font, mode)])]); // Since this will be passed into `makeVList` in the end, wrap the element
+  // in the appropriate tag that VList uses.
+
+  return {
+    type: "elem",
+    elem: corner
+  };
+};
+
+var makeInner = function makeInner(ch, height, options) {
+  // Create a span with inline SVG for the inner part of a tall stacked delimiter.
+  var width = fontMetricsData["Size4-Regular"][ch.charCodeAt(0)] ? fontMetricsData["Size4-Regular"][ch.charCodeAt(0)][4] : fontMetricsData["Size1-Regular"][ch.charCodeAt(0)][4];
+  var path = new PathNode("inner", innerPath(ch, Math.round(1000 * height)));
+  var svgNode = new SvgNode([path], {
+    "width": makeEm(width),
+    "height": makeEm(height),
+    // Override CSS rule `.katex svg { width: 100% }`
+    "style": "width:" + makeEm(width),
+    "viewBox": "0 0 " + 1000 * width + " " + Math.round(1000 * height),
+    "preserveAspectRatio": "xMinYMin"
+  });
+  var span = buildCommon.makeSvgSpan([], [svgNode], options);
+  span.height = height;
+  span.style.height = makeEm(height);
+  span.style.width = makeEm(width);
+  return {
+    type: "elem",
+    elem: span
+  };
+}; // Helpers for makeStackedDelim
+
+
+var lapInEms = 0.008;
+var lap = {
+  type: "kern",
+  size: -1 * lapInEms
+};
+var verts = ["|", "\\lvert", "\\rvert", "\\vert"];
+var doubleVerts = ["\\|", "\\lVert", "\\rVert", "\\Vert"];
+/**
+ * Make a stacked delimiter out of a given delimiter, with the total height at
+ * least `heightTotal`. This routine is mentioned on page 442 of the TeXbook.
+ */
+
+var makeStackedDelim = function makeStackedDelim(delim, heightTotal, center, options, mode, classes) {
+  // There are four parts, the top, an optional middle, a repeated part, and a
+  // bottom.
+  var top;
+  var middle;
+  var repeat;
+  var bottom;
+  var svgLabel = "";
+  var viewBoxWidth = 0;
+  top = repeat = bottom = delim;
+  middle = null; // Also keep track of what font the delimiters are in
+
+  var font = "Size1-Regular"; // We set the parts and font based on the symbol. Note that we use
+  // '\u23d0' instead of '|' and '\u2016' instead of '\\|' for the
+  // repeats of the arrows
+
+  if (delim === "\\uparrow") {
+    repeat = bottom = "\u23D0";
+  } else if (delim === "\\Uparrow") {
+    repeat = bottom = "\u2016";
+  } else if (delim === "\\downarrow") {
+    top = repeat = "\u23D0";
+  } else if (delim === "\\Downarrow") {
+    top = repeat = "\u2016";
+  } else if (delim === "\\updownarrow") {
+    top = "\\uparrow";
+    repeat = "\u23D0";
+    bottom = "\\downarrow";
+  } else if (delim === "\\Updownarrow") {
+    top = "\\Uparrow";
+    repeat = "\u2016";
+    bottom = "\\Downarrow";
+  } else if (utils.contains(verts, delim)) {
+    repeat = "\u2223";
+    svgLabel = "vert";
+    viewBoxWidth = 333;
+  } else if (utils.contains(doubleVerts, delim)) {
+    repeat = "\u2225";
+    svgLabel = "doublevert";
+    viewBoxWidth = 556;
+  } else if (delim === "[" || delim === "\\lbrack") {
+    top = "\u23A1";
+    repeat = "\u23A2";
+    bottom = "\u23A3";
+    font = "Size4-Regular";
+    svgLabel = "lbrack";
+    viewBoxWidth = 667;
+  } else if (delim === "]" || delim === "\\rbrack") {
+    top = "\u23A4";
+    repeat = "\u23A5";
+    bottom = "\u23A6";
+    font = "Size4-Regular";
+    svgLabel = "rbrack";
+    viewBoxWidth = 667;
+  } else if (delim === "\\lfloor" || delim === "\u230A") {
+    repeat = top = "\u23A2";
+    bottom = "\u23A3";
+    font = "Size4-Regular";
+    svgLabel = "lfloor";
+    viewBoxWidth = 667;
+  } else if (delim === "\\lceil" || delim === "\u2308") {
+    top = "\u23A1";
+    repeat = bottom = "\u23A2";
+    font = "Size4-Regular";
+    svgLabel = "lceil";
+    viewBoxWidth = 667;
+  } else if (delim === "\\rfloor" || delim === "\u230B") {
+    repeat = top = "\u23A5";
+    bottom = "\u23A6";
+    font = "Size4-Regular";
+    svgLabel = "rfloor";
+    viewBoxWidth = 667;
+  } else if (delim === "\\rceil" || delim === "\u2309") {
+    top = "\u23A4";
+    repeat = bottom = "\u23A5";
+    font = "Size4-Regular";
+    svgLabel = "rceil";
+    viewBoxWidth = 667;
+  } else if (delim === "(" || delim === "\\lparen") {
+    top = "\u239B";
+    repeat = "\u239C";
+    bottom = "\u239D";
+    font = "Size4-Regular";
+    svgLabel = "lparen";
+    viewBoxWidth = 875;
+  } else if (delim === ")" || delim === "\\rparen") {
+    top = "\u239E";
+    repeat = "\u239F";
+    bottom = "\u23A0";
+    font = "Size4-Regular";
+    svgLabel = "rparen";
+    viewBoxWidth = 875;
+  } else if (delim === "\\{" || delim === "\\lbrace") {
+    top = "\u23A7";
+    middle = "\u23A8";
+    bottom = "\u23A9";
+    repeat = "\u23AA";
+    font = "Size4-Regular";
+  } else if (delim === "\\}" || delim === "\\rbrace") {
+    top = "\u23AB";
+    middle = "\u23AC";
+    bottom = "\u23AD";
+    repeat = "\u23AA";
+    font = "Size4-Regular";
+  } else if (delim === "\\lgroup" || delim === "\u27EE") {
+    top = "\u23A7";
+    bottom = "\u23A9";
+    repeat = "\u23AA";
+    font = "Size4-Regular";
+  } else if (delim === "\\rgroup" || delim === "\u27EF") {
+    top = "\u23AB";
+    bottom = "\u23AD";
+    repeat = "\u23AA";
+    font = "Size4-Regular";
+  } else if (delim === "\\lmoustache" || delim === "\u23B0") {
+    top = "\u23A7";
+    bottom = "\u23AD";
+    repeat = "\u23AA";
+    font = "Size4-Regular";
+  } else if (delim === "\\rmoustache" || delim === "\u23B1") {
+    top = "\u23AB";
+    bottom = "\u23A9";
+    repeat = "\u23AA";
+    font = "Size4-Regular";
+  } // Get the metrics of the four sections
+
+
+  var topMetrics = getMetrics(top, font, mode);
+  var topHeightTotal = topMetrics.height + topMetrics.depth;
+  var repeatMetrics = getMetrics(repeat, font, mode);
+  var repeatHeightTotal = repeatMetrics.height + repeatMetrics.depth;
+  var bottomMetrics = getMetrics(bottom, font, mode);
+  var bottomHeightTotal = bottomMetrics.height + bottomMetrics.depth;
+  var middleHeightTotal = 0;
+  var middleFactor = 1;
+
+  if (middle !== null) {
+    var middleMetrics = getMetrics(middle, font, mode);
+    middleHeightTotal = middleMetrics.height + middleMetrics.depth;
+    middleFactor = 2; // repeat symmetrically above and below middle
+  } // Calculate the minimal height that the delimiter can have.
+  // It is at least the size of the top, bottom, and optional middle combined.
+
+
+  var minHeight = topHeightTotal + bottomHeightTotal + middleHeightTotal; // Compute the number of copies of the repeat symbol we will need
+
+  var repeatCount = Math.max(0, Math.ceil((heightTotal - minHeight) / (middleFactor * repeatHeightTotal))); // Compute the total height of the delimiter including all the symbols
+
+  var realHeightTotal = minHeight + repeatCount * middleFactor * repeatHeightTotal; // The center of the delimiter is placed at the center of the axis. Note
+  // that in this context, "center" means that the delimiter should be
+  // centered around the axis in the current style, while normally it is
+  // centered around the axis in textstyle.
+
+  var axisHeight = options.fontMetrics().axisHeight;
+
+  if (center) {
+    axisHeight *= options.sizeMultiplier;
+  } // Calculate the depth
+
+
+  var depth = realHeightTotal / 2 - axisHeight; // Now, we start building the pieces that will go into the vlist
+  // Keep a list of the pieces of the stacked delimiter
+
+  var stack = [];
+
+  if (svgLabel.length > 0) {
+    // Instead of stacking glyphs, create a single SVG.
+    // This evades browser problems with imprecise positioning of spans.
+    var midHeight = realHeightTotal - topHeightTotal - bottomHeightTotal;
+    var viewBoxHeight = Math.round(realHeightTotal * 1000);
+    var pathStr = tallDelim(svgLabel, Math.round(midHeight * 1000));
+    var path = new PathNode(svgLabel, pathStr);
+    var width = (viewBoxWidth / 1000).toFixed(3) + "em";
+    var height = (viewBoxHeight / 1000).toFixed(3) + "em";
+    var svg = new SvgNode([path], {
+      "width": width,
+      "height": height,
+      "viewBox": "0 0 " + viewBoxWidth + " " + viewBoxHeight
+    });
+    var wrapper = buildCommon.makeSvgSpan([], [svg], options);
+    wrapper.height = viewBoxHeight / 1000;
+    wrapper.style.width = width;
+    wrapper.style.height = height;
+    stack.push({
+      type: "elem",
+      elem: wrapper
+    });
+  } else {
+    // Stack glyphs
+    // Start by adding the bottom symbol
+    stack.push(makeGlyphSpan(bottom, font, mode));
+    stack.push(lap); // overlap
+
+    if (middle === null) {
+      // The middle section will be an SVG. Make it an extra 0.016em tall.
+      // We'll overlap by 0.008em at top and bottom.
+      var innerHeight = realHeightTotal - topHeightTotal - bottomHeightTotal + 2 * lapInEms;
+      stack.push(makeInner(repeat, innerHeight, options));
+    } else {
+      // When there is a middle bit, we need the middle part and two repeated
+      // sections
+      var _innerHeight = (realHeightTotal - topHeightTotal - bottomHeightTotal - middleHeightTotal) / 2 + 2 * lapInEms;
+
+      stack.push(makeInner(repeat, _innerHeight, options)); // Now insert the middle of the brace.
+
+      stack.push(lap);
+      stack.push(makeGlyphSpan(middle, font, mode));
+      stack.push(lap);
+      stack.push(makeInner(repeat, _innerHeight, options));
+    } // Add the top symbol
+
+
+    stack.push(lap);
+    stack.push(makeGlyphSpan(top, font, mode));
+  } // Finally, build the vlist
+
+
+  var newOptions = options.havingBaseStyle(src_Style.TEXT);
+  var inner = buildCommon.makeVList({
+    positionType: "bottom",
+    positionData: depth,
+    children: stack
+  }, newOptions);
+  return styleWrap(buildCommon.makeSpan(["delimsizing", "mult"], [inner], newOptions), src_Style.TEXT, options, classes);
+}; // All surds have 0.08em padding above the vinculum inside the SVG.
+// That keeps browser span height rounding error from pinching the line.
+
+
+var vbPad = 80; // padding above the surd, measured inside the viewBox.
+
+var emPad = 0.08; // padding, in ems, measured in the document.
+
+var sqrtSvg = function sqrtSvg(sqrtName, height, viewBoxHeight, extraVinculum, options) {
+  var path = sqrtPath(sqrtName, extraVinculum, viewBoxHeight);
+  var pathNode = new PathNode(sqrtName, path);
+  var svg = new SvgNode([pathNode], {
+    // Note: 1000:1 ratio of viewBox to document em width.
+    "width": "400em",
+    "height": makeEm(height),
+    "viewBox": "0 0 400000 " + viewBoxHeight,
+    "preserveAspectRatio": "xMinYMin slice"
+  });
+  return buildCommon.makeSvgSpan(["hide-tail"], [svg], options);
+};
+/**
+ * Make a sqrt image of the given height,
+ */
+
+
+var makeSqrtImage = function makeSqrtImage(height, options) {
+  // Define a newOptions that removes the effect of size changes such as \Huge.
+  // We don't pick different a height surd for \Huge. For it, we scale up.
+  var newOptions = options.havingBaseSizing(); // Pick the desired surd glyph from a sequence of surds.
+
+  var delim = traverseSequence("\\surd", height * newOptions.sizeMultiplier, stackLargeDelimiterSequence, newOptions);
+  var sizeMultiplier = newOptions.sizeMultiplier; // default
+  // The standard sqrt SVGs each have a 0.04em thick vinculum.
+  // If Settings.minRuleThickness is larger than that, we add extraVinculum.
+
+  var extraVinculum = Math.max(0, options.minRuleThickness - options.fontMetrics().sqrtRuleThickness); // Create a span containing an SVG image of a sqrt symbol.
+
+  var span;
+  var spanHeight = 0;
+  var texHeight = 0;
+  var viewBoxHeight = 0;
+  var advanceWidth; // We create viewBoxes with 80 units of "padding" above each surd.
+  // Then browser rounding error on the parent span height will not
+  // encroach on the ink of the vinculum. But that padding is not
+  // included in the TeX-like `height` used for calculation of
+  // vertical alignment. So texHeight = span.height < span.style.height.
+
+  if (delim.type === "small") {
+    // Get an SVG that is derived from glyph U+221A in font KaTeX-Main.
+    // 1000 unit normal glyph height.
+    viewBoxHeight = 1000 + 1000 * extraVinculum + vbPad;
+
+    if (height < 1.0) {
+      sizeMultiplier = 1.0; // mimic a \textfont radical
+    } else if (height < 1.4) {
+      sizeMultiplier = 0.7; // mimic a \scriptfont radical
+    }
+
+    spanHeight = (1.0 + extraVinculum + emPad) / sizeMultiplier;
+    texHeight = (1.00 + extraVinculum) / sizeMultiplier;
+    span = sqrtSvg("sqrtMain", spanHeight, viewBoxHeight, extraVinculum, options);
+    span.style.minWidth = "0.853em";
+    advanceWidth = 0.833 / sizeMultiplier; // from the font.
+  } else if (delim.type === "large") {
+    // These SVGs come from fonts: KaTeX_Size1, _Size2, etc.
+    viewBoxHeight = (1000 + vbPad) * sizeToMaxHeight[delim.size];
+    texHeight = (sizeToMaxHeight[delim.size] + extraVinculum) / sizeMultiplier;
+    spanHeight = (sizeToMaxHeight[delim.size] + extraVinculum + emPad) / sizeMultiplier;
+    span = sqrtSvg("sqrtSize" + delim.size, spanHeight, viewBoxHeight, extraVinculum, options);
+    span.style.minWidth = "1.02em";
+    advanceWidth = 1.0 / sizeMultiplier; // 1.0 from the font.
+  } else {
+    // Tall sqrt. In TeX, this would be stacked using multiple glyphs.
+    // We'll use a single SVG to accomplish the same thing.
+    spanHeight = height + extraVinculum + emPad;
+    texHeight = height + extraVinculum;
+    viewBoxHeight = Math.floor(1000 * height + extraVinculum) + vbPad;
+    span = sqrtSvg("sqrtTall", spanHeight, viewBoxHeight, extraVinculum, options);
+    span.style.minWidth = "0.742em";
+    advanceWidth = 1.056;
+  }
+
+  span.height = texHeight;
+  span.style.height = makeEm(spanHeight);
+  return {
+    span: span,
+    advanceWidth: advanceWidth,
+    // Calculate the actual line width.
+    // This actually should depend on the chosen font -- e.g. \boldmath
+    // should use the thicker surd symbols from e.g. KaTeX_Main-Bold, and
+    // have thicker rules.
+    ruleWidth: (options.fontMetrics().sqrtRuleThickness + extraVinculum) * sizeMultiplier
+  };
+}; // There are three kinds of delimiters, delimiters that stack when they become
+// too large
+
+
+var stackLargeDelimiters = ["(", "\\lparen", ")", "\\rparen", "[", "\\lbrack", "]", "\\rbrack", "\\{", "\\lbrace", "\\}", "\\rbrace", "\\lfloor", "\\rfloor", "\u230A", "\u230B", "\\lceil", "\\rceil", "\u2308", "\u2309", "\\surd"]; // delimiters that always stack
+
+var stackAlwaysDelimiters = ["\\uparrow", "\\downarrow", "\\updownarrow", "\\Uparrow", "\\Downarrow", "\\Updownarrow", "|", "\\|", "\\vert", "\\Vert", "\\lvert", "\\rvert", "\\lVert", "\\rVert", "\\lgroup", "\\rgroup", "\u27EE", "\u27EF", "\\lmoustache", "\\rmoustache", "\u23B0", "\u23B1"]; // and delimiters that never stack
+
+var stackNeverDelimiters = ["<", ">", "\\langle", "\\rangle", "/", "\\backslash", "\\lt", "\\gt"]; // Metrics of the different sizes. Found by looking at TeX's output of
+// $\bigl| // \Bigl| \biggl| \Biggl| \showlists$
+// Used to create stacked delimiters of appropriate sizes in makeSizedDelim.
+
+var sizeToMaxHeight = [0, 1.2, 1.8, 2.4, 3.0];
+/**
+ * Used to create a delimiter of a specific size, where `size` is 1, 2, 3, or 4.
+ */
+
+var makeSizedDelim = function makeSizedDelim(delim, size, options, mode, classes) {
+  // < and > turn into \langle and \rangle in delimiters
+  if (delim === "<" || delim === "\\lt" || delim === "\u27E8") {
+    delim = "\\langle";
+  } else if (delim === ">" || delim === "\\gt" || delim === "\u27E9") {
+    delim = "\\rangle";
+  } // Sized delimiters are never centered.
+
+
+  if (utils.contains(stackLargeDelimiters, delim) || utils.contains(stackNeverDelimiters, delim)) {
+    return makeLargeDelim(delim, size, false, options, mode, classes);
+  } else if (utils.contains(stackAlwaysDelimiters, delim)) {
+    return makeStackedDelim(delim, sizeToMaxHeight[size], false, options, mode, classes);
+  } else {
+    throw new src_ParseError("Illegal delimiter: '" + delim + "'");
+  }
+};
+/**
+ * There are three different sequences of delimiter sizes that the delimiters
+ * follow depending on the kind of delimiter. This is used when creating custom
+ * sized delimiters to decide whether to create a small, large, or stacked
+ * delimiter.
+ *
+ * In real TeX, these sequences aren't explicitly defined, but are instead
+ * defined inside the font metrics. Since there are only three sequences that
+ * are possible for the delimiters that TeX defines, it is easier to just encode
+ * them explicitly here.
+ */
+
+
+// Delimiters that never stack try small delimiters and large delimiters only
+var stackNeverDelimiterSequence = [{
+  type: "small",
+  style: src_Style.SCRIPTSCRIPT
+}, {
+  type: "small",
+  style: src_Style.SCRIPT
+}, {
+  type: "small",
+  style: src_Style.TEXT
+}, {
+  type: "large",
+  size: 1
+}, {
+  type: "large",
+  size: 2
+}, {
+  type: "large",
+  size: 3
+}, {
+  type: "large",
+  size: 4
+}]; // Delimiters that always stack try the small delimiters first, then stack
+
+var stackAlwaysDelimiterSequence = [{
+  type: "small",
+  style: src_Style.SCRIPTSCRIPT
+}, {
+  type: "small",
+  style: src_Style.SCRIPT
+}, {
+  type: "small",
+  style: src_Style.TEXT
+}, {
+  type: "stack"
+}]; // Delimiters that stack when large try the small and then large delimiters, and
+// stack afterwards
+
+var stackLargeDelimiterSequence = [{
+  type: "small",
+  style: src_Style.SCRIPTSCRIPT
+}, {
+  type: "small",
+  style: src_Style.SCRIPT
+}, {
+  type: "small",
+  style: src_Style.TEXT
+}, {
+  type: "large",
+  size: 1
+}, {
+  type: "large",
+  size: 2
+}, {
+  type: "large",
+  size: 3
+}, {
+  type: "large",
+  size: 4
+}, {
+  type: "stack"
+}];
+/**
+ * Get the font used in a delimiter based on what kind of delimiter it is.
+ * TODO(#963) Use more specific font family return type once that is introduced.
+ */
+
+var delimTypeToFont = function delimTypeToFont(type) {
+  if (type.type === "small") {
+    return "Main-Regular";
+  } else if (type.type === "large") {
+    return "Size" + type.size + "-Regular";
+  } else if (type.type === "stack") {
+    return "Size4-Regular";
+  } else {
+    throw new Error("Add support for delim type '" + type.type + "' here.");
+  }
+};
+/**
+ * Traverse a sequence of types of delimiters to decide what kind of delimiter
+ * should be used to create a delimiter of the given height+depth.
+ */
+
+
+var traverseSequence = function traverseSequence(delim, height, sequence, options) {
+  // Here, we choose the index we should start at in the sequences. In smaller
+  // sizes (which correspond to larger numbers in style.size) we start earlier
+  // in the sequence. Thus, scriptscript starts at index 3-3=0, script starts
+  // at index 3-2=1, text starts at 3-1=2, and display starts at min(2,3-0)=2
+  var start = Math.min(2, 3 - options.style.size);
+
+  for (var i = start; i < sequence.length; i++) {
+    if (sequence[i].type === "stack") {
+      // This is always the last delimiter, so we just break the loop now.
+      break;
+    }
+
+    var metrics = getMetrics(delim, delimTypeToFont(sequence[i]), "math");
+    var heightDepth = metrics.height + metrics.depth; // Small delimiters are scaled down versions of the same font, so we
+    // account for the style change size.
+
+    if (sequence[i].type === "small") {
+      var newOptions = options.havingBaseStyle(sequence[i].style);
+      heightDepth *= newOptions.sizeMultiplier;
+    } // Check if the delimiter at this size works for the given height.
+
+
+    if (heightDepth > height) {
+      return sequence[i];
+    }
+  } // If we reached the end of the sequence, return the last sequence element.
+
+
+  return sequence[sequence.length - 1];
+};
+/**
+ * Make a delimiter of a given height+depth, with optional centering. Here, we
+ * traverse the sequences, and create a delimiter that the sequence tells us to.
+ */
+
+
+var makeCustomSizedDelim = function makeCustomSizedDelim(delim, height, center, options, mode, classes) {
+  if (delim === "<" || delim === "\\lt" || delim === "\u27E8") {
+    delim = "\\langle";
+  } else if (delim === ">" || delim === "\\gt" || delim === "\u27E9") {
+    delim = "\\rangle";
+  } // Decide what sequence to use
+
+
+  var sequence;
+
+  if (utils.contains(stackNeverDelimiters, delim)) {
+    sequence = stackNeverDelimiterSequence;
+  } else if (utils.contains(stackLargeDelimiters, delim)) {
+    sequence = stackLargeDelimiterSequence;
+  } else {
+    sequence = stackAlwaysDelimiterSequence;
+  } // Look through the sequence
+
+
+  var delimType = traverseSequence(delim, height, sequence, options); // Get the delimiter from font glyphs.
+  // Depending on the sequence element we decided on, call the
+  // appropriate function.
+
+  if (delimType.type === "small") {
+    return makeSmallDelim(delim, delimType.style, center, options, mode, classes);
+  } else if (delimType.type === "large") {
+    return makeLargeDelim(delim, delimType.size, center, options, mode, classes);
+  } else
+    /* if (delimType.type === "stack") */
+    {
+      return makeStackedDelim(delim, height, center, options, mode, classes);
+    }
+};
+/**
+ * Make a delimiter for use with `\left` and `\right`, given a height and depth
+ * of an expression that the delimiters surround.
+ */
+
+
+var makeLeftRightDelim = function makeLeftRightDelim(delim, height, depth, options, mode, classes) {
+  // We always center \left/\right delimiters, so the axis is always shifted
+  var axisHeight = options.fontMetrics().axisHeight * options.sizeMultiplier; // Taken from TeX source, tex.web, function make_left_right
+
+  var delimiterFactor = 901;
+  var delimiterExtend = 5.0 / options.fontMetrics().ptPerEm;
+  var maxDistFromAxis = Math.max(height - axisHeight, depth + axisHeight);
+  var totalHeight = Math.max( // In real TeX, calculations are done using integral values which are
+  // 65536 per pt, or 655360 per em. So, the division here truncates in
+  // TeX but doesn't here, producing different results. If we wanted to
+  // exactly match TeX's calculation, we could do
+  //   Math.floor(655360 * maxDistFromAxis / 500) *
+  //    delimiterFactor / 655360
+  // (To see the difference, compare
+  //    x^{x^{\left(\rule{0.1em}{0.68em}\right)}}
+  // in TeX and KaTeX)
+  maxDistFromAxis / 500 * delimiterFactor, 2 * maxDistFromAxis - delimiterExtend); // Finally, we defer to `makeCustomSizedDelim` with our calculated total
+  // height
+
+  return makeCustomSizedDelim(delim, totalHeight, true, options, mode, classes);
+};
+
+/* harmony default export */ var delimiter = ({
+  sqrtImage: makeSqrtImage,
+  sizedDelim: makeSizedDelim,
+  sizeToMaxHeight: sizeToMaxHeight,
+  customSizedDelim: makeCustomSizedDelim,
+  leftRightDelim: makeLeftRightDelim
+});
+;// CONCATENATED MODULE: ./src/functions/delimsizing.js
+
+
+
+
+
+
+
+
+
+
+// Extra data needed for the delimiter handler down below
+var delimiterSizes = {
+  "\\bigl": {
+    mclass: "mopen",
+    size: 1
+  },
+  "\\Bigl": {
+    mclass: "mopen",
+    size: 2
+  },
+  "\\biggl": {
+    mclass: "mopen",
+    size: 3
+  },
+  "\\Biggl": {
+    mclass: "mopen",
+    size: 4
+  },
+  "\\bigr": {
+    mclass: "mclose",
+    size: 1
+  },
+  "\\Bigr": {
+    mclass: "mclose",
+    size: 2
+  },
+  "\\biggr": {
+    mclass: "mclose",
+    size: 3
+  },
+  "\\Biggr": {
+    mclass: "mclose",
+    size: 4
+  },
+  "\\bigm": {
+    mclass: "mrel",
+    size: 1
+  },
+  "\\Bigm": {
+    mclass: "mrel",
+    size: 2
+  },
+  "\\biggm": {
+    mclass: "mrel",
+    size: 3
+  },
+  "\\Biggm": {
+    mclass: "mrel",
+    size: 4
+  },
+  "\\big": {
+    mclass: "mord",
+    size: 1
+  },
+  "\\Big": {
+    mclass: "mord",
+    size: 2
+  },
+  "\\bigg": {
+    mclass: "mord",
+    size: 3
+  },
+  "\\Bigg": {
+    mclass: "mord",
+    size: 4
+  }
+};
+var delimiters = ["(", "\\lparen", ")", "\\rparen", "[", "\\lbrack", "]", "\\rbrack", "\\{", "\\lbrace", "\\}", "\\rbrace", "\\lfloor", "\\rfloor", "\u230A", "\u230B", "\\lceil", "\\rceil", "\u2308", "\u2309", "<", ">", "\\langle", "\u27E8", "\\rangle", "\u27E9", "\\lt", "\\gt", "\\lvert", "\\rvert", "\\lVert", "\\rVert", "\\lgroup", "\\rgroup", "\u27EE", "\u27EF", "\\lmoustache", "\\rmoustache", "\u23B0", "\u23B1", "/", "\\backslash", "|", "\\vert", "\\|", "\\Vert", "\\uparrow", "\\Uparrow", "\\downarrow", "\\Downarrow", "\\updownarrow", "\\Updownarrow", "."];
+
+// Delimiter functions
+function checkDelimiter(delim, context) {
+  var symDelim = checkSymbolNodeType(delim);
+
+  if (symDelim && utils.contains(delimiters, symDelim.text)) {
+    return symDelim;
+  } else if (symDelim) {
+    throw new src_ParseError("Invalid delimiter '" + symDelim.text + "' after '" + context.funcName + "'", delim);
+  } else {
+    throw new src_ParseError("Invalid delimiter type '" + delim.type + "'", delim);
+  }
+}
+
+defineFunction({
+  type: "delimsizing",
+  names: ["\\bigl", "\\Bigl", "\\biggl", "\\Biggl", "\\bigr", "\\Bigr", "\\biggr", "\\Biggr", "\\bigm", "\\Bigm", "\\biggm", "\\Biggm", "\\big", "\\Big", "\\bigg", "\\Bigg"],
+  props: {
+    numArgs: 1,
+    argTypes: ["primitive"]
+  },
+  handler: function handler(context, args) {
+    var delim = checkDelimiter(args[0], context);
+    return {
+      type: "delimsizing",
+      mode: context.parser.mode,
+      size: delimiterSizes[context.funcName].size,
+      mclass: delimiterSizes[context.funcName].mclass,
+      delim: delim.text
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    if (group.delim === ".") {
+      // Empty delimiters still count as elements, even though they don't
+      // show anything.
+      return buildCommon.makeSpan([group.mclass]);
+    } // Use delimiter.sizedDelim to generate the delimiter.
+
+
+    return delimiter.sizedDelim(group.delim, group.size, options, group.mode, [group.mclass]);
+  },
+  mathmlBuilder: function mathmlBuilder(group) {
+    var children = [];
+
+    if (group.delim !== ".") {
+      children.push(makeText(group.delim, group.mode));
+    }
+
+    var node = new mathMLTree.MathNode("mo", children);
+
+    if (group.mclass === "mopen" || group.mclass === "mclose") {
+      // Only some of the delimsizing functions act as fences, and they
+      // return "mopen" or "mclose" mclass.
+      node.setAttribute("fence", "true");
+    } else {
+      // Explicitly disable fencing if it's not a fence, to override the
+      // defaults.
+      node.setAttribute("fence", "false");
+    }
+
+    node.setAttribute("stretchy", "true");
+    var size = makeEm(delimiter.sizeToMaxHeight[group.size]);
+    node.setAttribute("minsize", size);
+    node.setAttribute("maxsize", size);
+    return node;
+  }
+});
+
+function assertParsed(group) {
+  if (!group.body) {
+    throw new Error("Bug: The leftright ParseNode wasn't fully parsed.");
+  }
+}
+
+defineFunction({
+  type: "leftright-right",
+  names: ["\\right"],
+  props: {
+    numArgs: 1,
+    primitive: true
+  },
+  handler: function handler(context, args) {
+    // \left case below triggers parsing of \right in
+    //   `const right = parser.parseFunction();`
+    // uses this return value.
+    var color = context.parser.gullet.macros.get("\\current@color");
+
+    if (color && typeof color !== "string") {
+      throw new src_ParseError("\\current@color set to non-string in \\right");
+    }
+
+    return {
+      type: "leftright-right",
+      mode: context.parser.mode,
+      delim: checkDelimiter(args[0], context).text,
+      color: color // undefined if not set via \color
+
+    };
+  }
+});
+defineFunction({
+  type: "leftright",
+  names: ["\\left"],
+  props: {
+    numArgs: 1,
+    primitive: true
+  },
+  handler: function handler(context, args) {
+    var delim = checkDelimiter(args[0], context);
+    var parser = context.parser; // Parse out the implicit body
+
+    ++parser.leftrightDepth; // parseExpression stops before '\\right'
+
+    var body = parser.parseExpression(false);
+    --parser.leftrightDepth; // Check the next token
+
+    parser.expect("\\right", false);
+    var right = assertNodeType(parser.parseFunction(), "leftright-right");
+    return {
+      type: "leftright",
+      mode: parser.mode,
+      body: body,
+      left: delim.text,
+      right: right.delim,
+      rightColor: right.color
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    assertParsed(group); // Build the inner expression
+
+    var inner = buildExpression(group.body, options, true, ["mopen", "mclose"]);
+    var innerHeight = 0;
+    var innerDepth = 0;
+    var hadMiddle = false; // Calculate its height and depth
+
+    for (var i = 0; i < inner.length; i++) {
+      // Property `isMiddle` not defined on `span`. See comment in
+      // "middle"'s htmlBuilder.
+      // $FlowFixMe
+      if (inner[i].isMiddle) {
+        hadMiddle = true;
+      } else {
+        innerHeight = Math.max(inner[i].height, innerHeight);
+        innerDepth = Math.max(inner[i].depth, innerDepth);
+      }
+    } // The size of delimiters is the same, regardless of what style we are
+    // in. Thus, to correctly calculate the size of delimiter we need around
+    // a group, we scale down the inner size based on the size.
+
+
+    innerHeight *= options.sizeMultiplier;
+    innerDepth *= options.sizeMultiplier;
+    var leftDelim;
+
+    if (group.left === ".") {
+      // Empty delimiters in \left and \right make null delimiter spaces.
+      leftDelim = makeNullDelimiter(options, ["mopen"]);
+    } else {
+      // Otherwise, use leftRightDelim to generate the correct sized
+      // delimiter.
+      leftDelim = delimiter.leftRightDelim(group.left, innerHeight, innerDepth, options, group.mode, ["mopen"]);
+    } // Add it to the beginning of the expression
+
+
+    inner.unshift(leftDelim); // Handle middle delimiters
+
+    if (hadMiddle) {
+      for (var _i = 1; _i < inner.length; _i++) {
+        var middleDelim = inner[_i]; // Property `isMiddle` not defined on `span`. See comment in
+        // "middle"'s htmlBuilder.
+        // $FlowFixMe
+
+        var isMiddle = middleDelim.isMiddle;
+
+        if (isMiddle) {
+          // Apply the options that were active when \middle was called
+          inner[_i] = delimiter.leftRightDelim(isMiddle.delim, innerHeight, innerDepth, isMiddle.options, group.mode, []);
+        }
+      }
+    }
+
+    var rightDelim; // Same for the right delimiter, but using color specified by \color
+
+    if (group.right === ".") {
+      rightDelim = makeNullDelimiter(options, ["mclose"]);
+    } else {
+      var colorOptions = group.rightColor ? options.withColor(group.rightColor) : options;
+      rightDelim = delimiter.leftRightDelim(group.right, innerHeight, innerDepth, colorOptions, group.mode, ["mclose"]);
+    } // Add it to the end of the expression.
+
+
+    inner.push(rightDelim);
+    return buildCommon.makeSpan(["minner"], inner, options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    assertParsed(group);
+    var inner = buildMathML_buildExpression(group.body, options);
+
+    if (group.left !== ".") {
+      var leftNode = new mathMLTree.MathNode("mo", [makeText(group.left, group.mode)]);
+      leftNode.setAttribute("fence", "true");
+      inner.unshift(leftNode);
+    }
+
+    if (group.right !== ".") {
+      var rightNode = new mathMLTree.MathNode("mo", [makeText(group.right, group.mode)]);
+      rightNode.setAttribute("fence", "true");
+
+      if (group.rightColor) {
+        rightNode.setAttribute("mathcolor", group.rightColor);
+      }
+
+      inner.push(rightNode);
+    }
+
+    return makeRow(inner);
+  }
+});
+defineFunction({
+  type: "middle",
+  names: ["\\middle"],
+  props: {
+    numArgs: 1,
+    primitive: true
+  },
+  handler: function handler(context, args) {
+    var delim = checkDelimiter(args[0], context);
+
+    if (!context.parser.leftrightDepth) {
+      throw new src_ParseError("\\middle without preceding \\left", delim);
+    }
+
+    return {
+      type: "middle",
+      mode: context.parser.mode,
+      delim: delim.text
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var middleDelim;
+
+    if (group.delim === ".") {
+      middleDelim = makeNullDelimiter(options, []);
+    } else {
+      middleDelim = delimiter.sizedDelim(group.delim, 1, options, group.mode, []);
+      var isMiddle = {
+        delim: group.delim,
+        options: options
+      }; // Property `isMiddle` not defined on `span`. It is only used in
+      // this file above.
+      // TODO: Fix this violation of the `span` type and possibly rename
+      // things since `isMiddle` sounds like a boolean, but is a struct.
+      // $FlowFixMe
+
+      middleDelim.isMiddle = isMiddle;
+    }
+
+    return middleDelim;
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    // A Firefox \middle will stretch a character vertically only if it
+    // is in the fence part of the operator dictionary at:
+    // https://www.w3.org/TR/MathML3/appendixc.html.
+    // So we need to avoid U+2223 and use plain "|" instead.
+    var textNode = group.delim === "\\vert" || group.delim === "|" ? makeText("|", "text") : makeText(group.delim, group.mode);
+    var middleNode = new mathMLTree.MathNode("mo", [textNode]);
+    middleNode.setAttribute("fence", "true"); // MathML gives 5/18em spacing to each  element.
+    // \middle should get delimiter spacing instead.
+
+    middleNode.setAttribute("lspace", "0.05em");
+    middleNode.setAttribute("rspace", "0.05em");
+    return middleNode;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/enclose.js
+
+
+
+
+
+
+
+
+
+
+
+
+var enclose_htmlBuilder = function htmlBuilder(group, options) {
+  // \cancel, \bcancel, \xcancel, \sout, \fbox, \colorbox, \fcolorbox, \phase
+  // Some groups can return document fragments.  Handle those by wrapping
+  // them in a span.
+  var inner = buildCommon.wrapFragment(buildGroup(group.body, options), options);
+  var label = group.label.slice(1);
+  var scale = options.sizeMultiplier;
+  var img;
+  var imgShift = 0; // In the LaTeX cancel package, line geometry is slightly different
+  // depending on whether the subject is wider than it is tall, or vice versa.
+  // We don't know the width of a group, so as a proxy, we test if
+  // the subject is a single character. This captures most of the
+  // subjects that should get the "tall" treatment.
+
+  var isSingleChar = utils.isCharacterBox(group.body);
+
+  if (label === "sout") {
+    img = buildCommon.makeSpan(["stretchy", "sout"]);
+    img.height = options.fontMetrics().defaultRuleThickness / scale;
+    imgShift = -0.5 * options.fontMetrics().xHeight;
+  } else if (label === "phase") {
+    // Set a couple of dimensions from the steinmetz package.
+    var lineWeight = calculateSize({
+      number: 0.6,
+      unit: "pt"
+    }, options);
+    var clearance = calculateSize({
+      number: 0.35,
+      unit: "ex"
+    }, options); // Prevent size changes like \Huge from affecting line thickness
+
+    var newOptions = options.havingBaseSizing();
+    scale = scale / newOptions.sizeMultiplier;
+    var angleHeight = inner.height + inner.depth + lineWeight + clearance; // Reserve a left pad for the angle.
+
+    inner.style.paddingLeft = makeEm(angleHeight / 2 + lineWeight); // Create an SVG
+
+    var viewBoxHeight = Math.floor(1000 * angleHeight * scale);
+    var path = phasePath(viewBoxHeight);
+    var svgNode = new SvgNode([new PathNode("phase", path)], {
+      "width": "400em",
+      "height": makeEm(viewBoxHeight / 1000),
+      "viewBox": "0 0 400000 " + viewBoxHeight,
+      "preserveAspectRatio": "xMinYMin slice"
+    }); // Wrap it in a span with overflow: hidden.
+
+    img = buildCommon.makeSvgSpan(["hide-tail"], [svgNode], options);
+    img.style.height = makeEm(angleHeight);
+    imgShift = inner.depth + lineWeight + clearance;
+  } else {
+    // Add horizontal padding
+    if (/cancel/.test(label)) {
+      if (!isSingleChar) {
+        inner.classes.push("cancel-pad");
+      }
+    } else if (label === "angl") {
+      inner.classes.push("anglpad");
+    } else {
+      inner.classes.push("boxpad");
+    } // Add vertical padding
+
+
+    var topPad = 0;
+    var bottomPad = 0;
+    var ruleThickness = 0; // ref: cancel package: \advance\totalheight2\p@ % "+2"
+
+    if (/box/.test(label)) {
+      ruleThickness = Math.max(options.fontMetrics().fboxrule, // default
+      options.minRuleThickness // User override.
+      );
+      topPad = options.fontMetrics().fboxsep + (label === "colorbox" ? 0 : ruleThickness);
+      bottomPad = topPad;
+    } else if (label === "angl") {
+      ruleThickness = Math.max(options.fontMetrics().defaultRuleThickness, options.minRuleThickness);
+      topPad = 4 * ruleThickness; // gap = 3 × line, plus the line itself.
+
+      bottomPad = Math.max(0, 0.25 - inner.depth);
+    } else {
+      topPad = isSingleChar ? 0.2 : 0;
+      bottomPad = topPad;
+    }
+
+    img = stretchy.encloseSpan(inner, label, topPad, bottomPad, options);
+
+    if (/fbox|boxed|fcolorbox/.test(label)) {
+      img.style.borderStyle = "solid";
+      img.style.borderWidth = makeEm(ruleThickness);
+    } else if (label === "angl" && ruleThickness !== 0.049) {
+      img.style.borderTopWidth = makeEm(ruleThickness);
+      img.style.borderRightWidth = makeEm(ruleThickness);
+    }
+
+    imgShift = inner.depth + bottomPad;
+
+    if (group.backgroundColor) {
+      img.style.backgroundColor = group.backgroundColor;
+
+      if (group.borderColor) {
+        img.style.borderColor = group.borderColor;
+      }
+    }
+  }
+
+  var vlist;
+
+  if (group.backgroundColor) {
+    vlist = buildCommon.makeVList({
+      positionType: "individualShift",
+      children: [// Put the color background behind inner;
+      {
+        type: "elem",
+        elem: img,
+        shift: imgShift
+      }, {
+        type: "elem",
+        elem: inner,
+        shift: 0
+      }]
+    }, options);
+  } else {
+    var classes = /cancel|phase/.test(label) ? ["svg-align"] : [];
+    vlist = buildCommon.makeVList({
+      positionType: "individualShift",
+      children: [// Write the \cancel stroke on top of inner.
+      {
+        type: "elem",
+        elem: inner,
+        shift: 0
+      }, {
+        type: "elem",
+        elem: img,
+        shift: imgShift,
+        wrapperClasses: classes
+      }]
+    }, options);
+  }
+
+  if (/cancel/.test(label)) {
+    // The cancel package documentation says that cancel lines add their height
+    // to the expression, but tests show that isn't how it actually works.
+    vlist.height = inner.height;
+    vlist.depth = inner.depth;
+  }
+
+  if (/cancel/.test(label) && !isSingleChar) {
+    // cancel does not create horiz space for its line extension.
+    return buildCommon.makeSpan(["mord", "cancel-lap"], [vlist], options);
+  } else {
+    return buildCommon.makeSpan(["mord"], [vlist], options);
+  }
+};
+
+var enclose_mathmlBuilder = function mathmlBuilder(group, options) {
+  var fboxsep = 0;
+  var node = new mathMLTree.MathNode(group.label.indexOf("colorbox") > -1 ? "mpadded" : "menclose", [buildMathML_buildGroup(group.body, options)]);
+
+  switch (group.label) {
+    case "\\cancel":
+      node.setAttribute("notation", "updiagonalstrike");
+      break;
+
+    case "\\bcancel":
+      node.setAttribute("notation", "downdiagonalstrike");
+      break;
+
+    case "\\phase":
+      node.setAttribute("notation", "phasorangle");
+      break;
+
+    case "\\sout":
+      node.setAttribute("notation", "horizontalstrike");
+      break;
+
+    case "\\fbox":
+      node.setAttribute("notation", "box");
+      break;
+
+    case "\\angl":
+      node.setAttribute("notation", "actuarial");
+      break;
+
+    case "\\fcolorbox":
+    case "\\colorbox":
+      //  doesn't have a good notation option. So use 
+      // instead. Set some attributes that come included with .
+      fboxsep = options.fontMetrics().fboxsep * options.fontMetrics().ptPerEm;
+      node.setAttribute("width", "+" + 2 * fboxsep + "pt");
+      node.setAttribute("height", "+" + 2 * fboxsep + "pt");
+      node.setAttribute("lspace", fboxsep + "pt"); //
+
+      node.setAttribute("voffset", fboxsep + "pt");
+
+      if (group.label === "\\fcolorbox") {
+        var thk = Math.max(options.fontMetrics().fboxrule, // default
+        options.minRuleThickness // user override
+        );
+        node.setAttribute("style", "border: " + thk + "em solid " + String(group.borderColor));
+      }
+
+      break;
+
+    case "\\xcancel":
+      node.setAttribute("notation", "updiagonalstrike downdiagonalstrike");
+      break;
+  }
+
+  if (group.backgroundColor) {
+    node.setAttribute("mathbackground", group.backgroundColor);
+  }
+
+  return node;
+};
+
+defineFunction({
+  type: "enclose",
+  names: ["\\colorbox"],
+  props: {
+    numArgs: 2,
+    allowedInText: true,
+    argTypes: ["color", "text"]
+  },
+  handler: function handler(_ref, args, optArgs) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var color = assertNodeType(args[0], "color-token").color;
+    var body = args[1];
+    return {
+      type: "enclose",
+      mode: parser.mode,
+      label: funcName,
+      backgroundColor: color,
+      body: body
+    };
+  },
+  htmlBuilder: enclose_htmlBuilder,
+  mathmlBuilder: enclose_mathmlBuilder
+});
+defineFunction({
+  type: "enclose",
+  names: ["\\fcolorbox"],
+  props: {
+    numArgs: 3,
+    allowedInText: true,
+    argTypes: ["color", "color", "text"]
+  },
+  handler: function handler(_ref2, args, optArgs) {
+    var parser = _ref2.parser,
+        funcName = _ref2.funcName;
+    var borderColor = assertNodeType(args[0], "color-token").color;
+    var backgroundColor = assertNodeType(args[1], "color-token").color;
+    var body = args[2];
+    return {
+      type: "enclose",
+      mode: parser.mode,
+      label: funcName,
+      backgroundColor: backgroundColor,
+      borderColor: borderColor,
+      body: body
+    };
+  },
+  htmlBuilder: enclose_htmlBuilder,
+  mathmlBuilder: enclose_mathmlBuilder
+});
+defineFunction({
+  type: "enclose",
+  names: ["\\fbox"],
+  props: {
+    numArgs: 1,
+    argTypes: ["hbox"],
+    allowedInText: true
+  },
+  handler: function handler(_ref3, args) {
+    var parser = _ref3.parser;
+    return {
+      type: "enclose",
+      mode: parser.mode,
+      label: "\\fbox",
+      body: args[0]
+    };
+  }
+});
+defineFunction({
+  type: "enclose",
+  names: ["\\cancel", "\\bcancel", "\\xcancel", "\\sout", "\\phase"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(_ref4, args) {
+    var parser = _ref4.parser,
+        funcName = _ref4.funcName;
+    var body = args[0];
+    return {
+      type: "enclose",
+      mode: parser.mode,
+      label: funcName,
+      body: body
+    };
+  },
+  htmlBuilder: enclose_htmlBuilder,
+  mathmlBuilder: enclose_mathmlBuilder
+});
+defineFunction({
+  type: "enclose",
+  names: ["\\angl"],
+  props: {
+    numArgs: 1,
+    argTypes: ["hbox"],
+    allowedInText: false
+  },
+  handler: function handler(_ref5, args) {
+    var parser = _ref5.parser;
+    return {
+      type: "enclose",
+      mode: parser.mode,
+      label: "\\angl",
+      body: args[0]
+    };
+  }
+});
+;// CONCATENATED MODULE: ./src/defineEnvironment.js
+
+
+/**
+ * All registered environments.
+ * `environments.js` exports this same dictionary again and makes it public.
+ * `Parser.js` requires this dictionary via `environments.js`.
+ */
+var _environments = {};
+function defineEnvironment(_ref) {
+  var type = _ref.type,
+      names = _ref.names,
+      props = _ref.props,
+      handler = _ref.handler,
+      htmlBuilder = _ref.htmlBuilder,
+      mathmlBuilder = _ref.mathmlBuilder;
+  // Set default values of environments.
+  var data = {
+    type: type,
+    numArgs: props.numArgs || 0,
+    allowedInText: false,
+    numOptionalArgs: 0,
+    handler: handler
+  };
+
+  for (var i = 0; i < names.length; ++i) {
+    // TODO: The value type of _environments should be a type union of all
+    // possible `EnvSpec<>` possibilities instead of `EnvSpec<*>`, which is
+    // an existential type.
+    _environments[names[i]] = data;
+  }
+
+  if (htmlBuilder) {
+    _htmlGroupBuilders[type] = htmlBuilder;
+  }
+
+  if (mathmlBuilder) {
+    _mathmlGroupBuilders[type] = mathmlBuilder;
+  }
+}
+;// CONCATENATED MODULE: ./src/defineMacro.js
+
+
+/**
+ * All registered global/built-in macros.
+ * `macros.js` exports this same dictionary again and makes it public.
+ * `Parser.js` requires this dictionary via `macros.js`.
+ */
+var _macros = {}; // This function might one day accept an additional argument and do more things.
+
+function defineMacro(name, body) {
+  _macros[name] = body;
+}
+;// CONCATENATED MODULE: ./src/SourceLocation.js
+/**
+ * Lexing or parsing positional information for error reporting.
+ * This object is immutable.
+ */
+var SourceLocation = /*#__PURE__*/function () {
+  // The + prefix indicates that these fields aren't writeable
+  // Lexer holding the input string.
+  // Start offset, zero-based inclusive.
+  // End offset, zero-based exclusive.
+  function SourceLocation(lexer, start, end) {
+    this.lexer = void 0;
+    this.start = void 0;
+    this.end = void 0;
+    this.lexer = lexer;
+    this.start = start;
+    this.end = end;
+  }
+  /**
+   * Merges two `SourceLocation`s from location providers, given they are
+   * provided in order of appearance.
+   * - Returns the first one's location if only the first is provided.
+   * - Returns a merged range of the first and the last if both are provided
+   *   and their lexers match.
+   * - Otherwise, returns null.
+   */
+
+
+  SourceLocation.range = function range(first, second) {
+    if (!second) {
+      return first && first.loc;
+    } else if (!first || !first.loc || !second.loc || first.loc.lexer !== second.loc.lexer) {
+      return null;
+    } else {
+      return new SourceLocation(first.loc.lexer, first.loc.start, second.loc.end);
+    }
+  };
+
+  return SourceLocation;
+}();
+
+
+;// CONCATENATED MODULE: ./src/Token.js
+
+/**
+ * Interface required to break circular dependency between Token, Lexer, and
+ * ParseError.
+ */
+
+/**
+ * The resulting token returned from `lex`.
+ *
+ * It consists of the token text plus some position information.
+ * The position information is essentially a range in an input string,
+ * but instead of referencing the bare input string, we refer to the lexer.
+ * That way it is possible to attach extra metadata to the input string,
+ * like for example a file name or similar.
+ *
+ * The position information is optional, so it is OK to construct synthetic
+ * tokens if appropriate. Not providing available position information may
+ * lead to degraded error reporting, though.
+ */
+var Token = /*#__PURE__*/function () {
+  // don't expand the token
+  // used in \noexpand
+  function Token(text, // the text of this token
+  loc) {
+    this.text = void 0;
+    this.loc = void 0;
+    this.noexpand = void 0;
+    this.treatAsRelax = void 0;
+    this.text = text;
+    this.loc = loc;
+  }
+  /**
+   * Given a pair of tokens (this and endToken), compute a `Token` encompassing
+   * the whole input range enclosed by these two.
+   */
+
+
+  var _proto = Token.prototype;
+
+  _proto.range = function range(endToken, // last token of the range, inclusive
+  text // the text of the newly constructed token
+  ) {
+    return new Token(text, SourceLocation.range(this, endToken));
+  };
+
+  return Token;
+}();
+;// CONCATENATED MODULE: ./src/environments/array.js
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+// Helper functions
+function getHLines(parser) {
+  // Return an array. The array length = number of hlines.
+  // Each element in the array tells if the line is dashed.
+  var hlineInfo = [];
+  parser.consumeSpaces();
+  var nxt = parser.fetch().text;
+
+  if (nxt === "\\relax") {
+    // \relax is an artifact of the \cr macro below
+    parser.consume();
+    parser.consumeSpaces();
+    nxt = parser.fetch().text;
+  }
+
+  while (nxt === "\\hline" || nxt === "\\hdashline") {
+    parser.consume();
+    hlineInfo.push(nxt === "\\hdashline");
+    parser.consumeSpaces();
+    nxt = parser.fetch().text;
+  }
+
+  return hlineInfo;
+}
+
+var validateAmsEnvironmentContext = function validateAmsEnvironmentContext(context) {
+  var settings = context.parser.settings;
+
+  if (!settings.displayMode) {
+    throw new src_ParseError("{" + context.envName + "} can be used only in" + " display mode.");
+  }
+}; // autoTag (an argument to parseArray) can be one of three values:
+// * undefined: Regular (not-top-level) array; no tags on each row
+// * true: Automatic equation numbering, overridable by \tag
+// * false: Tags allowed on each row, but no automatic numbering
+// This function *doesn't* work with the "split" environment name.
+
+
+function getAutoTag(name) {
+  if (name.indexOf("ed") === -1) {
+    return name.indexOf("*") === -1;
+  } // return undefined;
+
+}
+/**
+ * Parse the body of the environment, with rows delimited by \\ and
+ * columns delimited by &, and create a nested list in row-major order
+ * with one group per cell.  If given an optional argument style
+ * ("text", "display", etc.), then each cell is cast into that style.
+ */
+
+
+function parseArray(parser, _ref, style) {
+  var hskipBeforeAndAfter = _ref.hskipBeforeAndAfter,
+      addJot = _ref.addJot,
+      cols = _ref.cols,
+      arraystretch = _ref.arraystretch,
+      colSeparationType = _ref.colSeparationType,
+      autoTag = _ref.autoTag,
+      singleRow = _ref.singleRow,
+      emptySingleRow = _ref.emptySingleRow,
+      maxNumCols = _ref.maxNumCols,
+      leqno = _ref.leqno;
+  parser.gullet.beginGroup();
+
+  if (!singleRow) {
+    // \cr is equivalent to \\ without the optional size argument (see below)
+    // TODO: provide helpful error when \cr is used outside array environment
+    parser.gullet.macros.set("\\cr", "\\\\\\relax");
+  } // Get current arraystretch if it's not set by the environment
+
+
+  if (!arraystretch) {
+    var stretch = parser.gullet.expandMacroAsText("\\arraystretch");
+
+    if (stretch == null) {
+      // Default \arraystretch from lttab.dtx
+      arraystretch = 1;
+    } else {
+      arraystretch = parseFloat(stretch);
+
+      if (!arraystretch || arraystretch < 0) {
+        throw new src_ParseError("Invalid \\arraystretch: " + stretch);
+      }
+    }
+  } // Start group for first cell
+
+
+  parser.gullet.beginGroup();
+  var row = [];
+  var body = [row];
+  var rowGaps = [];
+  var hLinesBeforeRow = [];
+  var tags = autoTag != null ? [] : undefined; // amsmath uses \global\@eqnswtrue and \global\@eqnswfalse to represent
+  // whether this row should have an equation number.  Simulate this with
+  // a \@eqnsw macro set to 1 or 0.
+
+  function beginRow() {
+    if (autoTag) {
+      parser.gullet.macros.set("\\@eqnsw", "1", true);
+    }
+  }
+
+  function endRow() {
+    if (tags) {
+      if (parser.gullet.macros.get("\\df@tag")) {
+        tags.push(parser.subparse([new Token("\\df@tag")]));
+        parser.gullet.macros.set("\\df@tag", undefined, true);
+      } else {
+        tags.push(Boolean(autoTag) && parser.gullet.macros.get("\\@eqnsw") === "1");
+      }
+    }
+  }
+
+  beginRow(); // Test for \hline at the top of the array.
+
+  hLinesBeforeRow.push(getHLines(parser));
+
+  while (true) {
+    // eslint-disable-line no-constant-condition
+    // Parse each cell in its own group (namespace)
+    var cell = parser.parseExpression(false, singleRow ? "\\end" : "\\\\");
+    parser.gullet.endGroup();
+    parser.gullet.beginGroup();
+    cell = {
+      type: "ordgroup",
+      mode: parser.mode,
+      body: cell
+    };
+
+    if (style) {
+      cell = {
+        type: "styling",
+        mode: parser.mode,
+        style: style,
+        body: [cell]
+      };
+    }
+
+    row.push(cell);
+    var next = parser.fetch().text;
+
+    if (next === "&") {
+      if (maxNumCols && row.length === maxNumCols) {
+        if (singleRow || colSeparationType) {
+          // {equation} or {split}
+          throw new src_ParseError("Too many tab characters: &", parser.nextToken);
+        } else {
+          // {array} environment
+          parser.settings.reportNonstrict("textEnv", "Too few columns " + "specified in the {array} column argument.");
+        }
+      }
+
+      parser.consume();
+    } else if (next === "\\end") {
+      endRow(); // Arrays terminate newlines with `\crcr` which consumes a `\cr` if
+      // the last line is empty.  However, AMS environments keep the
+      // empty row if it's the only one.
+      // NOTE: Currently, `cell` is the last item added into `row`.
+
+      if (row.length === 1 && cell.type === "styling" && cell.body[0].body.length === 0 && (body.length > 1 || !emptySingleRow)) {
+        body.pop();
+      }
+
+      if (hLinesBeforeRow.length < body.length + 1) {
+        hLinesBeforeRow.push([]);
+      }
+
+      break;
+    } else if (next === "\\\\") {
+      parser.consume();
+      var size = void 0; // \def\Let@{\let\\\math@cr}
+      // \def\math@cr{...\math@cr@}
+      // \def\math@cr@{\new@ifnextchar[\math@cr@@{\math@cr@@[\z@]}}
+      // \def\math@cr@@[#1]{...\math@cr@@@...}
+      // \def\math@cr@@@{\cr}
+
+      if (parser.gullet.future().text !== " ") {
+        size = parser.parseSizeGroup(true);
+      }
+
+      rowGaps.push(size ? size.value : null);
+      endRow(); // check for \hline(s) following the row separator
+
+      hLinesBeforeRow.push(getHLines(parser));
+      row = [];
+      body.push(row);
+      beginRow();
+    } else {
+      throw new src_ParseError("Expected & or \\\\ or \\cr or \\end", parser.nextToken);
+    }
+  } // End cell group
+
+
+  parser.gullet.endGroup(); // End array group defining \cr
+
+  parser.gullet.endGroup();
+  return {
+    type: "array",
+    mode: parser.mode,
+    addJot: addJot,
+    arraystretch: arraystretch,
+    body: body,
+    cols: cols,
+    rowGaps: rowGaps,
+    hskipBeforeAndAfter: hskipBeforeAndAfter,
+    hLinesBeforeRow: hLinesBeforeRow,
+    colSeparationType: colSeparationType,
+    tags: tags,
+    leqno: leqno
+  };
+} // Decides on a style for cells in an array according to whether the given
+// environment name starts with the letter 'd'.
+
+
+function dCellStyle(envName) {
+  if (envName.slice(0, 1) === "d") {
+    return "display";
+  } else {
+    return "text";
+  }
+}
+
+var array_htmlBuilder = function htmlBuilder(group, options) {
+  var r;
+  var c;
+  var nr = group.body.length;
+  var hLinesBeforeRow = group.hLinesBeforeRow;
+  var nc = 0;
+  var body = new Array(nr);
+  var hlines = [];
+  var ruleThickness = Math.max( // From LaTeX \showthe\arrayrulewidth. Equals 0.04 em.
+  options.fontMetrics().arrayRuleWidth, options.minRuleThickness // User override.
+  ); // Horizontal spacing
+
+  var pt = 1 / options.fontMetrics().ptPerEm;
+  var arraycolsep = 5 * pt; // default value, i.e. \arraycolsep in article.cls
+
+  if (group.colSeparationType && group.colSeparationType === "small") {
+    // We're in a {smallmatrix}. Default column space is \thickspace,
+    // i.e. 5/18em = 0.2778em, per amsmath.dtx for {smallmatrix}.
+    // But that needs adjustment because LaTeX applies \scriptstyle to the
+    // entire array, including the colspace, but this function applies
+    // \scriptstyle only inside each element.
+    var localMultiplier = options.havingStyle(src_Style.SCRIPT).sizeMultiplier;
+    arraycolsep = 0.2778 * (localMultiplier / options.sizeMultiplier);
+  } // Vertical spacing
+
+
+  var baselineskip = group.colSeparationType === "CD" ? calculateSize({
+    number: 3,
+    unit: "ex"
+  }, options) : 12 * pt; // see size10.clo
+  // Default \jot from ltmath.dtx
+  // TODO(edemaine): allow overriding \jot via \setlength (#687)
+
+  var jot = 3 * pt;
+  var arrayskip = group.arraystretch * baselineskip;
+  var arstrutHeight = 0.7 * arrayskip; // \strutbox in ltfsstrc.dtx and
+
+  var arstrutDepth = 0.3 * arrayskip; // \@arstrutbox in lttab.dtx
+
+  var totalHeight = 0; // Set a position for \hline(s) at the top of the array, if any.
+
+  function setHLinePos(hlinesInGap) {
+    for (var i = 0; i < hlinesInGap.length; ++i) {
+      if (i > 0) {
+        totalHeight += 0.25;
+      }
+
+      hlines.push({
+        pos: totalHeight,
+        isDashed: hlinesInGap[i]
+      });
+    }
+  }
+
+  setHLinePos(hLinesBeforeRow[0]);
+
+  for (r = 0; r < group.body.length; ++r) {
+    var inrow = group.body[r];
+    var height = arstrutHeight; // \@array adds an \@arstrut
+
+    var depth = arstrutDepth; // to each tow (via the template)
+
+    if (nc < inrow.length) {
+      nc = inrow.length;
+    }
+
+    var outrow = new Array(inrow.length);
+
+    for (c = 0; c < inrow.length; ++c) {
+      var elt = buildGroup(inrow[c], options);
+
+      if (depth < elt.depth) {
+        depth = elt.depth;
+      }
+
+      if (height < elt.height) {
+        height = elt.height;
+      }
+
+      outrow[c] = elt;
+    }
+
+    var rowGap = group.rowGaps[r];
+    var gap = 0;
+
+    if (rowGap) {
+      gap = calculateSize(rowGap, options);
+
+      if (gap > 0) {
+        // \@argarraycr
+        gap += arstrutDepth;
+
+        if (depth < gap) {
+          depth = gap; // \@xargarraycr
+        }
+
+        gap = 0;
+      }
+    } // In AMS multiline environments such as aligned and gathered, rows
+    // correspond to lines that have additional \jot added to the
+    // \baselineskip via \openup.
+
+
+    if (group.addJot) {
+      depth += jot;
+    }
+
+    outrow.height = height;
+    outrow.depth = depth;
+    totalHeight += height;
+    outrow.pos = totalHeight;
+    totalHeight += depth + gap; // \@yargarraycr
+
+    body[r] = outrow; // Set a position for \hline(s), if any.
+
+    setHLinePos(hLinesBeforeRow[r + 1]);
+  }
+
+  var offset = totalHeight / 2 + options.fontMetrics().axisHeight;
+  var colDescriptions = group.cols || [];
+  var cols = [];
+  var colSep;
+  var colDescrNum;
+  var tagSpans = [];
+
+  if (group.tags && group.tags.some(function (tag) {
+    return tag;
+  })) {
+    // An environment with manual tags and/or automatic equation numbers.
+    // Create node(s), the latter of which trigger CSS counter increment.
+    for (r = 0; r < nr; ++r) {
+      var rw = body[r];
+      var shift = rw.pos - offset;
+      var tag = group.tags[r];
+      var tagSpan = void 0;
+
+      if (tag === true) {
+        // automatic numbering
+        tagSpan = buildCommon.makeSpan(["eqn-num"], [], options);
+      } else if (tag === false) {
+        // \nonumber/\notag or starred environment
+        tagSpan = buildCommon.makeSpan([], [], options);
+      } else {
+        // manual \tag
+        tagSpan = buildCommon.makeSpan([], buildExpression(tag, options, true), options);
+      }
+
+      tagSpan.depth = rw.depth;
+      tagSpan.height = rw.height;
+      tagSpans.push({
+        type: "elem",
+        elem: tagSpan,
+        shift: shift
+      });
+    }
+  }
+
+  for (c = 0, colDescrNum = 0; // Continue while either there are more columns or more column
+  // descriptions, so trailing separators don't get lost.
+  c < nc || colDescrNum < colDescriptions.length; ++c, ++colDescrNum) {
+    var colDescr = colDescriptions[colDescrNum] || {};
+    var firstSeparator = true;
+
+    while (colDescr.type === "separator") {
+      // If there is more than one separator in a row, add a space
+      // between them.
+      if (!firstSeparator) {
+        colSep = buildCommon.makeSpan(["arraycolsep"], []);
+        colSep.style.width = makeEm(options.fontMetrics().doubleRuleSep);
+        cols.push(colSep);
+      }
+
+      if (colDescr.separator === "|" || colDescr.separator === ":") {
+        var lineType = colDescr.separator === "|" ? "solid" : "dashed";
+        var separator = buildCommon.makeSpan(["vertical-separator"], [], options);
+        separator.style.height = makeEm(totalHeight);
+        separator.style.borderRightWidth = makeEm(ruleThickness);
+        separator.style.borderRightStyle = lineType;
+        separator.style.margin = "0 " + makeEm(-ruleThickness / 2);
+
+        var _shift = totalHeight - offset;
+
+        if (_shift) {
+          separator.style.verticalAlign = makeEm(-_shift);
+        }
+
+        cols.push(separator);
+      } else {
+        throw new src_ParseError("Invalid separator type: " + colDescr.separator);
+      }
+
+      colDescrNum++;
+      colDescr = colDescriptions[colDescrNum] || {};
+      firstSeparator = false;
+    }
+
+    if (c >= nc) {
+      continue;
+    }
+
+    var sepwidth = void 0;
+
+    if (c > 0 || group.hskipBeforeAndAfter) {
+      sepwidth = utils.deflt(colDescr.pregap, arraycolsep);
+
+      if (sepwidth !== 0) {
+        colSep = buildCommon.makeSpan(["arraycolsep"], []);
+        colSep.style.width = makeEm(sepwidth);
+        cols.push(colSep);
+      }
+    }
+
+    var col = [];
+
+    for (r = 0; r < nr; ++r) {
+      var row = body[r];
+      var elem = row[c];
+
+      if (!elem) {
+        continue;
+      }
+
+      var _shift2 = row.pos - offset;
+
+      elem.depth = row.depth;
+      elem.height = row.height;
+      col.push({
+        type: "elem",
+        elem: elem,
+        shift: _shift2
+      });
+    }
+
+    col = buildCommon.makeVList({
+      positionType: "individualShift",
+      children: col
+    }, options);
+    col = buildCommon.makeSpan(["col-align-" + (colDescr.align || "c")], [col]);
+    cols.push(col);
+
+    if (c < nc - 1 || group.hskipBeforeAndAfter) {
+      sepwidth = utils.deflt(colDescr.postgap, arraycolsep);
+
+      if (sepwidth !== 0) {
+        colSep = buildCommon.makeSpan(["arraycolsep"], []);
+        colSep.style.width = makeEm(sepwidth);
+        cols.push(colSep);
+      }
+    }
+  }
+
+  body = buildCommon.makeSpan(["mtable"], cols); // Add \hline(s), if any.
+
+  if (hlines.length > 0) {
+    var line = buildCommon.makeLineSpan("hline", options, ruleThickness);
+    var dashes = buildCommon.makeLineSpan("hdashline", options, ruleThickness);
+    var vListElems = [{
+      type: "elem",
+      elem: body,
+      shift: 0
+    }];
+
+    while (hlines.length > 0) {
+      var hline = hlines.pop();
+      var lineShift = hline.pos - offset;
+
+      if (hline.isDashed) {
+        vListElems.push({
+          type: "elem",
+          elem: dashes,
+          shift: lineShift
+        });
+      } else {
+        vListElems.push({
+          type: "elem",
+          elem: line,
+          shift: lineShift
+        });
+      }
+    }
+
+    body = buildCommon.makeVList({
+      positionType: "individualShift",
+      children: vListElems
+    }, options);
+  }
+
+  if (tagSpans.length === 0) {
+    return buildCommon.makeSpan(["mord"], [body], options);
+  } else {
+    var eqnNumCol = buildCommon.makeVList({
+      positionType: "individualShift",
+      children: tagSpans
+    }, options);
+    eqnNumCol = buildCommon.makeSpan(["tag"], [eqnNumCol], options);
+    return buildCommon.makeFragment([body, eqnNumCol]);
+  }
+};
+
+var alignMap = {
+  c: "center ",
+  l: "left ",
+  r: "right "
+};
+
+var array_mathmlBuilder = function mathmlBuilder(group, options) {
+  var tbl = [];
+  var glue = new mathMLTree.MathNode("mtd", [], ["mtr-glue"]);
+  var tag = new mathMLTree.MathNode("mtd", [], ["mml-eqn-num"]);
+
+  for (var i = 0; i < group.body.length; i++) {
+    var rw = group.body[i];
+    var row = [];
+
+    for (var j = 0; j < rw.length; j++) {
+      row.push(new mathMLTree.MathNode("mtd", [buildMathML_buildGroup(rw[j], options)]));
+    }
+
+    if (group.tags && group.tags[i]) {
+      row.unshift(glue);
+      row.push(glue);
+
+      if (group.leqno) {
+        row.unshift(tag);
+      } else {
+        row.push(tag);
+      }
+    }
+
+    tbl.push(new mathMLTree.MathNode("mtr", row));
+  }
+
+  var table = new mathMLTree.MathNode("mtable", tbl); // Set column alignment, row spacing, column spacing, and
+  // array lines by setting attributes on the table element.
+  // Set the row spacing. In MathML, we specify a gap distance.
+  // We do not use rowGap[] because MathML automatically increases
+  // cell height with the height/depth of the element content.
+  // LaTeX \arraystretch multiplies the row baseline-to-baseline distance.
+  // We simulate this by adding (arraystretch - 1)em to the gap. This
+  // does a reasonable job of adjusting arrays containing 1 em tall content.
+  // The 0.16 and 0.09 values are found empirically. They produce an array
+  // similar to LaTeX and in which content does not interfere with \hlines.
+
+  var gap = group.arraystretch === 0.5 ? 0.1 // {smallmatrix}, {subarray}
+  : 0.16 + group.arraystretch - 1 + (group.addJot ? 0.09 : 0);
+  table.setAttribute("rowspacing", makeEm(gap)); // MathML table lines go only between cells.
+  // To place a line on an edge we'll use , if necessary.
+
+  var menclose = "";
+  var align = "";
+
+  if (group.cols && group.cols.length > 0) {
+    // Find column alignment, column spacing, and  vertical lines.
+    var cols = group.cols;
+    var columnLines = "";
+    var prevTypeWasAlign = false;
+    var iStart = 0;
+    var iEnd = cols.length;
+
+    if (cols[0].type === "separator") {
+      menclose += "top ";
+      iStart = 1;
+    }
+
+    if (cols[cols.length - 1].type === "separator") {
+      menclose += "bottom ";
+      iEnd -= 1;
+    }
+
+    for (var _i = iStart; _i < iEnd; _i++) {
+      if (cols[_i].type === "align") {
+        align += alignMap[cols[_i].align];
+
+        if (prevTypeWasAlign) {
+          columnLines += "none ";
+        }
+
+        prevTypeWasAlign = true;
+      } else if (cols[_i].type === "separator") {
+        // MathML accepts only single lines between cells.
+        // So we read only the first of consecutive separators.
+        if (prevTypeWasAlign) {
+          columnLines += cols[_i].separator === "|" ? "solid " : "dashed ";
+          prevTypeWasAlign = false;
+        }
+      }
+    }
+
+    table.setAttribute("columnalign", align.trim());
+
+    if (/[sd]/.test(columnLines)) {
+      table.setAttribute("columnlines", columnLines.trim());
+    }
+  } // Set column spacing.
+
+
+  if (group.colSeparationType === "align") {
+    var _cols = group.cols || [];
+
+    var spacing = "";
+
+    for (var _i2 = 1; _i2 < _cols.length; _i2++) {
+      spacing += _i2 % 2 ? "0em " : "1em ";
+    }
+
+    table.setAttribute("columnspacing", spacing.trim());
+  } else if (group.colSeparationType === "alignat" || group.colSeparationType === "gather") {
+    table.setAttribute("columnspacing", "0em");
+  } else if (group.colSeparationType === "small") {
+    table.setAttribute("columnspacing", "0.2778em");
+  } else if (group.colSeparationType === "CD") {
+    table.setAttribute("columnspacing", "0.5em");
+  } else {
+    table.setAttribute("columnspacing", "1em");
+  } // Address \hline and \hdashline
+
+
+  var rowLines = "";
+  var hlines = group.hLinesBeforeRow;
+  menclose += hlines[0].length > 0 ? "left " : "";
+  menclose += hlines[hlines.length - 1].length > 0 ? "right " : "";
+
+  for (var _i3 = 1; _i3 < hlines.length - 1; _i3++) {
+    rowLines += hlines[_i3].length === 0 ? "none " // MathML accepts only a single line between rows. Read one element.
+    : hlines[_i3][0] ? "dashed " : "solid ";
+  }
+
+  if (/[sd]/.test(rowLines)) {
+    table.setAttribute("rowlines", rowLines.trim());
+  }
+
+  if (menclose !== "") {
+    table = new mathMLTree.MathNode("menclose", [table]);
+    table.setAttribute("notation", menclose.trim());
+  }
+
+  if (group.arraystretch && group.arraystretch < 1) {
+    // A small array. Wrap in scriptstyle so row gap is not too large.
+    table = new mathMLTree.MathNode("mstyle", [table]);
+    table.setAttribute("scriptlevel", "1");
+  }
+
+  return table;
+}; // Convenience function for align, align*, aligned, alignat, alignat*, alignedat.
+
+
+var alignedHandler = function alignedHandler(context, args) {
+  if (context.envName.indexOf("ed") === -1) {
+    validateAmsEnvironmentContext(context);
+  }
+
+  var cols = [];
+  var separationType = context.envName.indexOf("at") > -1 ? "alignat" : "align";
+  var isSplit = context.envName === "split";
+  var res = parseArray(context.parser, {
+    cols: cols,
+    addJot: true,
+    autoTag: isSplit ? undefined : getAutoTag(context.envName),
+    emptySingleRow: true,
+    colSeparationType: separationType,
+    maxNumCols: isSplit ? 2 : undefined,
+    leqno: context.parser.settings.leqno
+  }, "display"); // Determining number of columns.
+  // 1. If the first argument is given, we use it as a number of columns,
+  //    and makes sure that each row doesn't exceed that number.
+  // 2. Otherwise, just count number of columns = maximum number
+  //    of cells in each row ("aligned" mode -- isAligned will be true).
+  //
+  // At the same time, prepend empty group {} at beginning of every second
+  // cell in each row (starting with second cell) so that operators become
+  // binary.  This behavior is implemented in amsmath's \start@aligned.
+
+  var numMaths;
+  var numCols = 0;
+  var emptyGroup = {
+    type: "ordgroup",
+    mode: context.mode,
+    body: []
+  };
+
+  if (args[0] && args[0].type === "ordgroup") {
+    var arg0 = "";
+
+    for (var i = 0; i < args[0].body.length; i++) {
+      var textord = assertNodeType(args[0].body[i], "textord");
+      arg0 += textord.text;
+    }
+
+    numMaths = Number(arg0);
+    numCols = numMaths * 2;
+  }
+
+  var isAligned = !numCols;
+  res.body.forEach(function (row) {
+    for (var _i4 = 1; _i4 < row.length; _i4 += 2) {
+      // Modify ordgroup node within styling node
+      var styling = assertNodeType(row[_i4], "styling");
+      var ordgroup = assertNodeType(styling.body[0], "ordgroup");
+      ordgroup.body.unshift(emptyGroup);
+    }
+
+    if (!isAligned) {
+      // Case 1
+      var curMaths = row.length / 2;
+
+      if (numMaths < curMaths) {
+        throw new src_ParseError("Too many math in a row: " + ("expected " + numMaths + ", but got " + curMaths), row[0]);
+      }
+    } else if (numCols < row.length) {
+      // Case 2
+      numCols = row.length;
+    }
+  }); // Adjusting alignment.
+  // In aligned mode, we add one \qquad between columns;
+  // otherwise we add nothing.
+
+  for (var _i5 = 0; _i5 < numCols; ++_i5) {
+    var align = "r";
+    var pregap = 0;
+
+    if (_i5 % 2 === 1) {
+      align = "l";
+    } else if (_i5 > 0 && isAligned) {
+      // "aligned" mode.
+      pregap = 1; // add one \quad
+    }
+
+    cols[_i5] = {
+      type: "align",
+      align: align,
+      pregap: pregap,
+      postgap: 0
+    };
+  }
+
+  res.colSeparationType = isAligned ? "align" : "alignat";
+  return res;
+}; // Arrays are part of LaTeX, defined in lttab.dtx so its documentation
+// is part of the source2e.pdf file of LaTeX2e source documentation.
+// {darray} is an {array} environment where cells are set in \displaystyle,
+// as defined in nccmath.sty.
+
+
+defineEnvironment({
+  type: "array",
+  names: ["array", "darray"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(context, args) {
+    // Since no types are specified above, the two possibilities are
+    // - The argument is wrapped in {} or [], in which case Parser's
+    //   parseGroup() returns an "ordgroup" wrapping some symbol node.
+    // - The argument is a bare symbol node.
+    var symNode = checkSymbolNodeType(args[0]);
+    var colalign = symNode ? [args[0]] : assertNodeType(args[0], "ordgroup").body;
+    var cols = colalign.map(function (nde) {
+      var node = assertSymbolNodeType(nde);
+      var ca = node.text;
+
+      if ("lcr".indexOf(ca) !== -1) {
+        return {
+          type: "align",
+          align: ca
+        };
+      } else if (ca === "|") {
+        return {
+          type: "separator",
+          separator: "|"
+        };
+      } else if (ca === ":") {
+        return {
+          type: "separator",
+          separator: ":"
+        };
+      }
+
+      throw new src_ParseError("Unknown column alignment: " + ca, nde);
+    });
+    var res = {
+      cols: cols,
+      hskipBeforeAndAfter: true,
+      // \@preamble in lttab.dtx
+      maxNumCols: cols.length
+    };
+    return parseArray(context.parser, res, dCellStyle(context.envName));
+  },
+  htmlBuilder: array_htmlBuilder,
+  mathmlBuilder: array_mathmlBuilder
+}); // The matrix environments of amsmath builds on the array environment
+// of LaTeX, which is discussed above.
+// The mathtools package adds starred versions of the same environments.
+// These have an optional argument to choose left|center|right justification.
+
+defineEnvironment({
+  type: "array",
+  names: ["matrix", "pmatrix", "bmatrix", "Bmatrix", "vmatrix", "Vmatrix", "matrix*", "pmatrix*", "bmatrix*", "Bmatrix*", "vmatrix*", "Vmatrix*"],
+  props: {
+    numArgs: 0
+  },
+  handler: function handler(context) {
+    var delimiters = {
+      "matrix": null,
+      "pmatrix": ["(", ")"],
+      "bmatrix": ["[", "]"],
+      "Bmatrix": ["\\{", "\\}"],
+      "vmatrix": ["|", "|"],
+      "Vmatrix": ["\\Vert", "\\Vert"]
+    }[context.envName.replace("*", "")]; // \hskip -\arraycolsep in amsmath
+
+    var colAlign = "c";
+    var payload = {
+      hskipBeforeAndAfter: false,
+      cols: [{
+        type: "align",
+        align: colAlign
+      }]
+    };
+
+    if (context.envName.charAt(context.envName.length - 1) === "*") {
+      // It's one of the mathtools starred functions.
+      // Parse the optional alignment argument.
+      var parser = context.parser;
+      parser.consumeSpaces();
+
+      if (parser.fetch().text === "[") {
+        parser.consume();
+        parser.consumeSpaces();
+        colAlign = parser.fetch().text;
+
+        if ("lcr".indexOf(colAlign) === -1) {
+          throw new src_ParseError("Expected l or c or r", parser.nextToken);
+        }
+
+        parser.consume();
+        parser.consumeSpaces();
+        parser.expect("]");
+        parser.consume();
+        payload.cols = [{
+          type: "align",
+          align: colAlign
+        }];
+      }
+    }
+
+    var res = parseArray(context.parser, payload, dCellStyle(context.envName)); // Populate cols with the correct number of column alignment specs.
+
+    var numCols = Math.max.apply(Math, [0].concat(res.body.map(function (row) {
+      return row.length;
+    })));
+    res.cols = new Array(numCols).fill({
+      type: "align",
+      align: colAlign
+    });
+    return delimiters ? {
+      type: "leftright",
+      mode: context.mode,
+      body: [res],
+      left: delimiters[0],
+      right: delimiters[1],
+      rightColor: undefined // \right uninfluenced by \color in array
+
+    } : res;
+  },
+  htmlBuilder: array_htmlBuilder,
+  mathmlBuilder: array_mathmlBuilder
+});
+defineEnvironment({
+  type: "array",
+  names: ["smallmatrix"],
+  props: {
+    numArgs: 0
+  },
+  handler: function handler(context) {
+    var payload = {
+      arraystretch: 0.5
+    };
+    var res = parseArray(context.parser, payload, "script");
+    res.colSeparationType = "small";
+    return res;
+  },
+  htmlBuilder: array_htmlBuilder,
+  mathmlBuilder: array_mathmlBuilder
+});
+defineEnvironment({
+  type: "array",
+  names: ["subarray"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(context, args) {
+    // Parsing of {subarray} is similar to {array}
+    var symNode = checkSymbolNodeType(args[0]);
+    var colalign = symNode ? [args[0]] : assertNodeType(args[0], "ordgroup").body;
+    var cols = colalign.map(function (nde) {
+      var node = assertSymbolNodeType(nde);
+      var ca = node.text; // {subarray} only recognizes "l" & "c"
+
+      if ("lc".indexOf(ca) !== -1) {
+        return {
+          type: "align",
+          align: ca
+        };
+      }
+
+      throw new src_ParseError("Unknown column alignment: " + ca, nde);
+    });
+
+    if (cols.length > 1) {
+      throw new src_ParseError("{subarray} can contain only one column");
+    }
+
+    var res = {
+      cols: cols,
+      hskipBeforeAndAfter: false,
+      arraystretch: 0.5
+    };
+    res = parseArray(context.parser, res, "script");
+
+    if (res.body.length > 0 && res.body[0].length > 1) {
+      throw new src_ParseError("{subarray} can contain only one column");
+    }
+
+    return res;
+  },
+  htmlBuilder: array_htmlBuilder,
+  mathmlBuilder: array_mathmlBuilder
+}); // A cases environment (in amsmath.sty) is almost equivalent to
+// \def\arraystretch{1.2}%
+// \left\{\begin{array}{@{}l@{\quad}l@{}} … \end{array}\right.
+// {dcases} is a {cases} environment where cells are set in \displaystyle,
+// as defined in mathtools.sty.
+// {rcases} is another mathtools environment. It's brace is on the right side.
+
+defineEnvironment({
+  type: "array",
+  names: ["cases", "dcases", "rcases", "drcases"],
+  props: {
+    numArgs: 0
+  },
+  handler: function handler(context) {
+    var payload = {
+      arraystretch: 1.2,
+      cols: [{
+        type: "align",
+        align: "l",
+        pregap: 0,
+        // TODO(kevinb) get the current style.
+        // For now we use the metrics for TEXT style which is what we were
+        // doing before.  Before attempting to get the current style we
+        // should look at TeX's behavior especially for \over and matrices.
+        postgap: 1.0
+        /* 1em quad */
+
+      }, {
+        type: "align",
+        align: "l",
+        pregap: 0,
+        postgap: 0
+      }]
+    };
+    var res = parseArray(context.parser, payload, dCellStyle(context.envName));
+    return {
+      type: "leftright",
+      mode: context.mode,
+      body: [res],
+      left: context.envName.indexOf("r") > -1 ? "." : "\\{",
+      right: context.envName.indexOf("r") > -1 ? "\\}" : ".",
+      rightColor: undefined
+    };
+  },
+  htmlBuilder: array_htmlBuilder,
+  mathmlBuilder: array_mathmlBuilder
+}); // In the align environment, one uses ampersands, &, to specify number of
+// columns in each row, and to locate spacing between each column.
+// align gets automatic numbering. align* and aligned do not.
+// The alignedat environment can be used in math mode.
+// Note that we assume \nomallineskiplimit to be zero,
+// so that \strut@ is the same as \strut.
+
+defineEnvironment({
+  type: "array",
+  names: ["align", "align*", "aligned", "split"],
+  props: {
+    numArgs: 0
+  },
+  handler: alignedHandler,
+  htmlBuilder: array_htmlBuilder,
+  mathmlBuilder: array_mathmlBuilder
+}); // A gathered environment is like an array environment with one centered
+// column, but where rows are considered lines so get \jot line spacing
+// and contents are set in \displaystyle.
+
+defineEnvironment({
+  type: "array",
+  names: ["gathered", "gather", "gather*"],
+  props: {
+    numArgs: 0
+  },
+  handler: function handler(context) {
+    if (utils.contains(["gather", "gather*"], context.envName)) {
+      validateAmsEnvironmentContext(context);
+    }
+
+    var res = {
+      cols: [{
+        type: "align",
+        align: "c"
+      }],
+      addJot: true,
+      colSeparationType: "gather",
+      autoTag: getAutoTag(context.envName),
+      emptySingleRow: true,
+      leqno: context.parser.settings.leqno
+    };
+    return parseArray(context.parser, res, "display");
+  },
+  htmlBuilder: array_htmlBuilder,
+  mathmlBuilder: array_mathmlBuilder
+}); // alignat environment is like an align environment, but one must explicitly
+// specify maximum number of columns in each row, and can adjust spacing between
+// each columns.
+
+defineEnvironment({
+  type: "array",
+  names: ["alignat", "alignat*", "alignedat"],
+  props: {
+    numArgs: 1
+  },
+  handler: alignedHandler,
+  htmlBuilder: array_htmlBuilder,
+  mathmlBuilder: array_mathmlBuilder
+});
+defineEnvironment({
+  type: "array",
+  names: ["equation", "equation*"],
+  props: {
+    numArgs: 0
+  },
+  handler: function handler(context) {
+    validateAmsEnvironmentContext(context);
+    var res = {
+      autoTag: getAutoTag(context.envName),
+      emptySingleRow: true,
+      singleRow: true,
+      maxNumCols: 1,
+      leqno: context.parser.settings.leqno
+    };
+    return parseArray(context.parser, res, "display");
+  },
+  htmlBuilder: array_htmlBuilder,
+  mathmlBuilder: array_mathmlBuilder
+});
+defineEnvironment({
+  type: "array",
+  names: ["CD"],
+  props: {
+    numArgs: 0
+  },
+  handler: function handler(context) {
+    validateAmsEnvironmentContext(context);
+    return parseCD(context.parser);
+  },
+  htmlBuilder: array_htmlBuilder,
+  mathmlBuilder: array_mathmlBuilder
+});
+defineMacro("\\nonumber", "\\gdef\\@eqnsw{0}");
+defineMacro("\\notag", "\\nonumber"); // Catch \hline outside array environment
+
+defineFunction({
+  type: "text",
+  // Doesn't matter what this is.
+  names: ["\\hline", "\\hdashline"],
+  props: {
+    numArgs: 0,
+    allowedInText: true,
+    allowedInMath: true
+  },
+  handler: function handler(context, args) {
+    throw new src_ParseError(context.funcName + " valid only within array environment");
+  }
+});
+;// CONCATENATED MODULE: ./src/environments.js
+
+var environments = _environments;
+/* harmony default export */ var src_environments = (environments); // All environment definitions should be imported below
+
+
+;// CONCATENATED MODULE: ./src/functions/environment.js
+
+
+
+ // Environment delimiters. HTML/MathML rendering is defined in the corresponding
+// defineEnvironment definitions.
+
+defineFunction({
+  type: "environment",
+  names: ["\\begin", "\\end"],
+  props: {
+    numArgs: 1,
+    argTypes: ["text"]
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var nameGroup = args[0];
+
+    if (nameGroup.type !== "ordgroup") {
+      throw new src_ParseError("Invalid environment name", nameGroup);
+    }
+
+    var envName = "";
+
+    for (var i = 0; i < nameGroup.body.length; ++i) {
+      envName += assertNodeType(nameGroup.body[i], "textord").text;
+    }
+
+    if (funcName === "\\begin") {
+      // begin...end is similar to left...right
+      if (!src_environments.hasOwnProperty(envName)) {
+        throw new src_ParseError("No such environment: " + envName, nameGroup);
+      } // Build the environment object. Arguments and other information will
+      // be made available to the begin and end methods using properties.
+
+
+      var env = src_environments[envName];
+
+      var _parser$parseArgument = parser.parseArguments("\\begin{" + envName + "}", env),
+          _args = _parser$parseArgument.args,
+          optArgs = _parser$parseArgument.optArgs;
+
+      var context = {
+        mode: parser.mode,
+        envName: envName,
+        parser: parser
+      };
+      var result = env.handler(context, _args, optArgs);
+      parser.expect("\\end", false);
+      var endNameToken = parser.nextToken;
+      var end = assertNodeType(parser.parseFunction(), "environment");
+
+      if (end.name !== envName) {
+        throw new src_ParseError("Mismatch: \\begin{" + envName + "} matched by \\end{" + end.name + "}", endNameToken);
+      } // $FlowFixMe, "environment" handler returns an environment ParseNode
+
+
+      return result;
+    }
+
+    return {
+      type: "environment",
+      mode: parser.mode,
+      name: envName,
+      nameGroup: nameGroup
+    };
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/font.js
+// TODO(kevinb): implement \\sl and \\sc
+
+
+
+
+
+
+var font_htmlBuilder = function htmlBuilder(group, options) {
+  var font = group.font;
+  var newOptions = options.withFont(font);
+  return buildGroup(group.body, newOptions);
+};
+
+var font_mathmlBuilder = function mathmlBuilder(group, options) {
+  var font = group.font;
+  var newOptions = options.withFont(font);
+  return buildMathML_buildGroup(group.body, newOptions);
+};
+
+var fontAliases = {
+  "\\Bbb": "\\mathbb",
+  "\\bold": "\\mathbf",
+  "\\frak": "\\mathfrak",
+  "\\bm": "\\boldsymbol"
+};
+defineFunction({
+  type: "font",
+  names: [// styles, except \boldsymbol defined below
+  "\\mathrm", "\\mathit", "\\mathbf", "\\mathnormal", // families
+  "\\mathbb", "\\mathcal", "\\mathfrak", "\\mathscr", "\\mathsf", "\\mathtt", // aliases, except \bm defined below
+  "\\Bbb", "\\bold", "\\frak"],
+  props: {
+    numArgs: 1,
+    allowedInArgument: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var body = normalizeArgument(args[0]);
+    var func = funcName;
+
+    if (func in fontAliases) {
+      func = fontAliases[func];
+    }
+
+    return {
+      type: "font",
+      mode: parser.mode,
+      font: func.slice(1),
+      body: body
+    };
+  },
+  htmlBuilder: font_htmlBuilder,
+  mathmlBuilder: font_mathmlBuilder
+});
+defineFunction({
+  type: "mclass",
+  names: ["\\boldsymbol", "\\bm"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(_ref2, args) {
+    var parser = _ref2.parser;
+    var body = args[0];
+    var isCharacterBox = utils.isCharacterBox(body); // amsbsy.sty's \boldsymbol uses \binrel spacing to inherit the
+    // argument's bin|rel|ord status
+
+    return {
+      type: "mclass",
+      mode: parser.mode,
+      mclass: binrelClass(body),
+      body: [{
+        type: "font",
+        mode: parser.mode,
+        font: "boldsymbol",
+        body: body
+      }],
+      isCharacterBox: isCharacterBox
+    };
+  }
+}); // Old font changing functions
+
+defineFunction({
+  type: "font",
+  names: ["\\rm", "\\sf", "\\tt", "\\bf", "\\it", "\\cal"],
+  props: {
+    numArgs: 0,
+    allowedInText: true
+  },
+  handler: function handler(_ref3, args) {
+    var parser = _ref3.parser,
+        funcName = _ref3.funcName,
+        breakOnTokenText = _ref3.breakOnTokenText;
+    var mode = parser.mode;
+    var body = parser.parseExpression(true, breakOnTokenText);
+    var style = "math" + funcName.slice(1);
+    return {
+      type: "font",
+      mode: mode,
+      font: style,
+      body: {
+        type: "ordgroup",
+        mode: parser.mode,
+        body: body
+      }
+    };
+  },
+  htmlBuilder: font_htmlBuilder,
+  mathmlBuilder: font_mathmlBuilder
+});
+;// CONCATENATED MODULE: ./src/functions/genfrac.js
+
+
+
+
+
+
+
+
+
+
+
+var adjustStyle = function adjustStyle(size, originalStyle) {
+  // Figure out what style this fraction should be in based on the
+  // function used
+  var style = originalStyle;
+
+  if (size === "display") {
+    // Get display style as a default.
+    // If incoming style is sub/sup, use style.text() to get correct size.
+    style = style.id >= src_Style.SCRIPT.id ? style.text() : src_Style.DISPLAY;
+  } else if (size === "text" && style.size === src_Style.DISPLAY.size) {
+    // We're in a \tfrac but incoming style is displaystyle, so:
+    style = src_Style.TEXT;
+  } else if (size === "script") {
+    style = src_Style.SCRIPT;
+  } else if (size === "scriptscript") {
+    style = src_Style.SCRIPTSCRIPT;
+  }
+
+  return style;
+};
+
+var genfrac_htmlBuilder = function htmlBuilder(group, options) {
+  // Fractions are handled in the TeXbook on pages 444-445, rules 15(a-e).
+  var style = adjustStyle(group.size, options.style);
+  var nstyle = style.fracNum();
+  var dstyle = style.fracDen();
+  var newOptions;
+  newOptions = options.havingStyle(nstyle);
+  var numerm = buildGroup(group.numer, newOptions, options);
+
+  if (group.continued) {
+    // \cfrac inserts a \strut into the numerator.
+    // Get \strut dimensions from TeXbook page 353.
+    var hStrut = 8.5 / options.fontMetrics().ptPerEm;
+    var dStrut = 3.5 / options.fontMetrics().ptPerEm;
+    numerm.height = numerm.height < hStrut ? hStrut : numerm.height;
+    numerm.depth = numerm.depth < dStrut ? dStrut : numerm.depth;
+  }
+
+  newOptions = options.havingStyle(dstyle);
+  var denomm = buildGroup(group.denom, newOptions, options);
+  var rule;
+  var ruleWidth;
+  var ruleSpacing;
+
+  if (group.hasBarLine) {
+    if (group.barSize) {
+      ruleWidth = calculateSize(group.barSize, options);
+      rule = buildCommon.makeLineSpan("frac-line", options, ruleWidth);
+    } else {
+      rule = buildCommon.makeLineSpan("frac-line", options);
+    }
+
+    ruleWidth = rule.height;
+    ruleSpacing = rule.height;
+  } else {
+    rule = null;
+    ruleWidth = 0;
+    ruleSpacing = options.fontMetrics().defaultRuleThickness;
+  } // Rule 15b
+
+
+  var numShift;
+  var clearance;
+  var denomShift;
+
+  if (style.size === src_Style.DISPLAY.size || group.size === "display") {
+    numShift = options.fontMetrics().num1;
+
+    if (ruleWidth > 0) {
+      clearance = 3 * ruleSpacing;
+    } else {
+      clearance = 7 * ruleSpacing;
+    }
+
+    denomShift = options.fontMetrics().denom1;
+  } else {
+    if (ruleWidth > 0) {
+      numShift = options.fontMetrics().num2;
+      clearance = ruleSpacing;
+    } else {
+      numShift = options.fontMetrics().num3;
+      clearance = 3 * ruleSpacing;
+    }
+
+    denomShift = options.fontMetrics().denom2;
+  }
+
+  var frac;
+
+  if (!rule) {
+    // Rule 15c
+    var candidateClearance = numShift - numerm.depth - (denomm.height - denomShift);
+
+    if (candidateClearance < clearance) {
+      numShift += 0.5 * (clearance - candidateClearance);
+      denomShift += 0.5 * (clearance - candidateClearance);
+    }
+
+    frac = buildCommon.makeVList({
+      positionType: "individualShift",
+      children: [{
+        type: "elem",
+        elem: denomm,
+        shift: denomShift
+      }, {
+        type: "elem",
+        elem: numerm,
+        shift: -numShift
+      }]
+    }, options);
+  } else {
+    // Rule 15d
+    var axisHeight = options.fontMetrics().axisHeight;
+
+    if (numShift - numerm.depth - (axisHeight + 0.5 * ruleWidth) < clearance) {
+      numShift += clearance - (numShift - numerm.depth - (axisHeight + 0.5 * ruleWidth));
+    }
+
+    if (axisHeight - 0.5 * ruleWidth - (denomm.height - denomShift) < clearance) {
+      denomShift += clearance - (axisHeight - 0.5 * ruleWidth - (denomm.height - denomShift));
+    }
+
+    var midShift = -(axisHeight - 0.5 * ruleWidth);
+    frac = buildCommon.makeVList({
+      positionType: "individualShift",
+      children: [{
+        type: "elem",
+        elem: denomm,
+        shift: denomShift
+      }, {
+        type: "elem",
+        elem: rule,
+        shift: midShift
+      }, {
+        type: "elem",
+        elem: numerm,
+        shift: -numShift
+      }]
+    }, options);
+  } // Since we manually change the style sometimes (with \dfrac or \tfrac),
+  // account for the possible size change here.
+
+
+  newOptions = options.havingStyle(style);
+  frac.height *= newOptions.sizeMultiplier / options.sizeMultiplier;
+  frac.depth *= newOptions.sizeMultiplier / options.sizeMultiplier; // Rule 15e
+
+  var delimSize;
+
+  if (style.size === src_Style.DISPLAY.size) {
+    delimSize = options.fontMetrics().delim1;
+  } else if (style.size === src_Style.SCRIPTSCRIPT.size) {
+    delimSize = options.havingStyle(src_Style.SCRIPT).fontMetrics().delim2;
+  } else {
+    delimSize = options.fontMetrics().delim2;
+  }
+
+  var leftDelim;
+  var rightDelim;
+
+  if (group.leftDelim == null) {
+    leftDelim = makeNullDelimiter(options, ["mopen"]);
+  } else {
+    leftDelim = delimiter.customSizedDelim(group.leftDelim, delimSize, true, options.havingStyle(style), group.mode, ["mopen"]);
+  }
+
+  if (group.continued) {
+    rightDelim = buildCommon.makeSpan([]); // zero width for \cfrac
+  } else if (group.rightDelim == null) {
+    rightDelim = makeNullDelimiter(options, ["mclose"]);
+  } else {
+    rightDelim = delimiter.customSizedDelim(group.rightDelim, delimSize, true, options.havingStyle(style), group.mode, ["mclose"]);
+  }
+
+  return buildCommon.makeSpan(["mord"].concat(newOptions.sizingClasses(options)), [leftDelim, buildCommon.makeSpan(["mfrac"], [frac]), rightDelim], options);
+};
+
+var genfrac_mathmlBuilder = function mathmlBuilder(group, options) {
+  var node = new mathMLTree.MathNode("mfrac", [buildMathML_buildGroup(group.numer, options), buildMathML_buildGroup(group.denom, options)]);
+
+  if (!group.hasBarLine) {
+    node.setAttribute("linethickness", "0px");
+  } else if (group.barSize) {
+    var ruleWidth = calculateSize(group.barSize, options);
+    node.setAttribute("linethickness", makeEm(ruleWidth));
+  }
+
+  var style = adjustStyle(group.size, options.style);
+
+  if (style.size !== options.style.size) {
+    node = new mathMLTree.MathNode("mstyle", [node]);
+    var isDisplay = style.size === src_Style.DISPLAY.size ? "true" : "false";
+    node.setAttribute("displaystyle", isDisplay);
+    node.setAttribute("scriptlevel", "0");
+  }
+
+  if (group.leftDelim != null || group.rightDelim != null) {
+    var withDelims = [];
+
+    if (group.leftDelim != null) {
+      var leftOp = new mathMLTree.MathNode("mo", [new mathMLTree.TextNode(group.leftDelim.replace("\\", ""))]);
+      leftOp.setAttribute("fence", "true");
+      withDelims.push(leftOp);
+    }
+
+    withDelims.push(node);
+
+    if (group.rightDelim != null) {
+      var rightOp = new mathMLTree.MathNode("mo", [new mathMLTree.TextNode(group.rightDelim.replace("\\", ""))]);
+      rightOp.setAttribute("fence", "true");
+      withDelims.push(rightOp);
+    }
+
+    return makeRow(withDelims);
+  }
+
+  return node;
+};
+
+defineFunction({
+  type: "genfrac",
+  names: ["\\dfrac", "\\frac", "\\tfrac", "\\dbinom", "\\binom", "\\tbinom", "\\\\atopfrac", // can’t be entered directly
+  "\\\\bracefrac", "\\\\brackfrac" // ditto
+  ],
+  props: {
+    numArgs: 2,
+    allowedInArgument: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var numer = args[0];
+    var denom = args[1];
+    var hasBarLine;
+    var leftDelim = null;
+    var rightDelim = null;
+    var size = "auto";
+
+    switch (funcName) {
+      case "\\dfrac":
+      case "\\frac":
+      case "\\tfrac":
+        hasBarLine = true;
+        break;
+
+      case "\\\\atopfrac":
+        hasBarLine = false;
+        break;
+
+      case "\\dbinom":
+      case "\\binom":
+      case "\\tbinom":
+        hasBarLine = false;
+        leftDelim = "(";
+        rightDelim = ")";
+        break;
+
+      case "\\\\bracefrac":
+        hasBarLine = false;
+        leftDelim = "\\{";
+        rightDelim = "\\}";
+        break;
+
+      case "\\\\brackfrac":
+        hasBarLine = false;
+        leftDelim = "[";
+        rightDelim = "]";
+        break;
+
+      default:
+        throw new Error("Unrecognized genfrac command");
+    }
+
+    switch (funcName) {
+      case "\\dfrac":
+      case "\\dbinom":
+        size = "display";
+        break;
+
+      case "\\tfrac":
+      case "\\tbinom":
+        size = "text";
+        break;
+    }
+
+    return {
+      type: "genfrac",
+      mode: parser.mode,
+      continued: false,
+      numer: numer,
+      denom: denom,
+      hasBarLine: hasBarLine,
+      leftDelim: leftDelim,
+      rightDelim: rightDelim,
+      size: size,
+      barSize: null
+    };
+  },
+  htmlBuilder: genfrac_htmlBuilder,
+  mathmlBuilder: genfrac_mathmlBuilder
+});
+defineFunction({
+  type: "genfrac",
+  names: ["\\cfrac"],
+  props: {
+    numArgs: 2
+  },
+  handler: function handler(_ref2, args) {
+    var parser = _ref2.parser,
+        funcName = _ref2.funcName;
+    var numer = args[0];
+    var denom = args[1];
+    return {
+      type: "genfrac",
+      mode: parser.mode,
+      continued: true,
+      numer: numer,
+      denom: denom,
+      hasBarLine: true,
+      leftDelim: null,
+      rightDelim: null,
+      size: "display",
+      barSize: null
+    };
+  }
+}); // Infix generalized fractions -- these are not rendered directly, but replaced
+// immediately by one of the variants above.
+
+defineFunction({
+  type: "infix",
+  names: ["\\over", "\\choose", "\\atop", "\\brace", "\\brack"],
+  props: {
+    numArgs: 0,
+    infix: true
+  },
+  handler: function handler(_ref3) {
+    var parser = _ref3.parser,
+        funcName = _ref3.funcName,
+        token = _ref3.token;
+    var replaceWith;
+
+    switch (funcName) {
+      case "\\over":
+        replaceWith = "\\frac";
+        break;
+
+      case "\\choose":
+        replaceWith = "\\binom";
+        break;
+
+      case "\\atop":
+        replaceWith = "\\\\atopfrac";
+        break;
+
+      case "\\brace":
+        replaceWith = "\\\\bracefrac";
+        break;
+
+      case "\\brack":
+        replaceWith = "\\\\brackfrac";
+        break;
+
+      default:
+        throw new Error("Unrecognized infix genfrac command");
+    }
+
+    return {
+      type: "infix",
+      mode: parser.mode,
+      replaceWith: replaceWith,
+      token: token
+    };
+  }
+});
+var stylArray = ["display", "text", "script", "scriptscript"];
+
+var delimFromValue = function delimFromValue(delimString) {
+  var delim = null;
+
+  if (delimString.length > 0) {
+    delim = delimString;
+    delim = delim === "." ? null : delim;
+  }
+
+  return delim;
+};
+
+defineFunction({
+  type: "genfrac",
+  names: ["\\genfrac"],
+  props: {
+    numArgs: 6,
+    allowedInArgument: true,
+    argTypes: ["math", "math", "size", "text", "math", "math"]
+  },
+  handler: function handler(_ref4, args) {
+    var parser = _ref4.parser;
+    var numer = args[4];
+    var denom = args[5]; // Look into the parse nodes to get the desired delimiters.
+
+    var leftNode = normalizeArgument(args[0]);
+    var leftDelim = leftNode.type === "atom" && leftNode.family === "open" ? delimFromValue(leftNode.text) : null;
+    var rightNode = normalizeArgument(args[1]);
+    var rightDelim = rightNode.type === "atom" && rightNode.family === "close" ? delimFromValue(rightNode.text) : null;
+    var barNode = assertNodeType(args[2], "size");
+    var hasBarLine;
+    var barSize = null;
+
+    if (barNode.isBlank) {
+      // \genfrac acts differently than \above.
+      // \genfrac treats an empty size group as a signal to use a
+      // standard bar size. \above would see size = 0 and omit the bar.
+      hasBarLine = true;
+    } else {
+      barSize = barNode.value;
+      hasBarLine = barSize.number > 0;
+    } // Find out if we want displaystyle, textstyle, etc.
+
+
+    var size = "auto";
+    var styl = args[3];
+
+    if (styl.type === "ordgroup") {
+      if (styl.body.length > 0) {
+        var textOrd = assertNodeType(styl.body[0], "textord");
+        size = stylArray[Number(textOrd.text)];
+      }
+    } else {
+      styl = assertNodeType(styl, "textord");
+      size = stylArray[Number(styl.text)];
+    }
+
+    return {
+      type: "genfrac",
+      mode: parser.mode,
+      numer: numer,
+      denom: denom,
+      continued: false,
+      hasBarLine: hasBarLine,
+      barSize: barSize,
+      leftDelim: leftDelim,
+      rightDelim: rightDelim,
+      size: size
+    };
+  },
+  htmlBuilder: genfrac_htmlBuilder,
+  mathmlBuilder: genfrac_mathmlBuilder
+}); // \above is an infix fraction that also defines a fraction bar size.
+
+defineFunction({
+  type: "infix",
+  names: ["\\above"],
+  props: {
+    numArgs: 1,
+    argTypes: ["size"],
+    infix: true
+  },
+  handler: function handler(_ref5, args) {
+    var parser = _ref5.parser,
+        funcName = _ref5.funcName,
+        token = _ref5.token;
+    return {
+      type: "infix",
+      mode: parser.mode,
+      replaceWith: "\\\\abovefrac",
+      size: assertNodeType(args[0], "size").value,
+      token: token
+    };
+  }
+});
+defineFunction({
+  type: "genfrac",
+  names: ["\\\\abovefrac"],
+  props: {
+    numArgs: 3,
+    argTypes: ["math", "size", "math"]
+  },
+  handler: function handler(_ref6, args) {
+    var parser = _ref6.parser,
+        funcName = _ref6.funcName;
+    var numer = args[0];
+    var barSize = assert(assertNodeType(args[1], "infix").size);
+    var denom = args[2];
+    var hasBarLine = barSize.number > 0;
+    return {
+      type: "genfrac",
+      mode: parser.mode,
+      numer: numer,
+      denom: denom,
+      continued: false,
+      hasBarLine: hasBarLine,
+      barSize: barSize,
+      leftDelim: null,
+      rightDelim: null,
+      size: "auto"
+    };
+  },
+  htmlBuilder: genfrac_htmlBuilder,
+  mathmlBuilder: genfrac_mathmlBuilder
+});
+;// CONCATENATED MODULE: ./src/functions/horizBrace.js
+
+
+
+
+
+
+
+
+// NOTE: Unlike most `htmlBuilder`s, this one handles not only "horizBrace", but
+// also "supsub" since an over/underbrace can affect super/subscripting.
+var horizBrace_htmlBuilder = function htmlBuilder(grp, options) {
+  var style = options.style; // Pull out the `ParseNode<"horizBrace">` if `grp` is a "supsub" node.
+
+  var supSubGroup;
+  var group;
+
+  if (grp.type === "supsub") {
+    // Ref: LaTeX source2e: }}}}\limits}
+    // i.e. LaTeX treats the brace similar to an op and passes it
+    // with \limits, so we need to assign supsub style.
+    supSubGroup = grp.sup ? buildGroup(grp.sup, options.havingStyle(style.sup()), options) : buildGroup(grp.sub, options.havingStyle(style.sub()), options);
+    group = assertNodeType(grp.base, "horizBrace");
+  } else {
+    group = assertNodeType(grp, "horizBrace");
+  } // Build the base group
+
+
+  var body = buildGroup(group.base, options.havingBaseStyle(src_Style.DISPLAY)); // Create the stretchy element
+
+  var braceBody = stretchy.svgSpan(group, options); // Generate the vlist, with the appropriate kerns        ┏━━━━━━━━┓
+  // This first vlist contains the content and the brace:   equation
+
+  var vlist;
+
+  if (group.isOver) {
+    vlist = buildCommon.makeVList({
+      positionType: "firstBaseline",
+      children: [{
+        type: "elem",
+        elem: body
+      }, {
+        type: "kern",
+        size: 0.1
+      }, {
+        type: "elem",
+        elem: braceBody
+      }]
+    }, options); // $FlowFixMe: Replace this with passing "svg-align" into makeVList.
+
+    vlist.children[0].children[0].children[1].classes.push("svg-align");
+  } else {
+    vlist = buildCommon.makeVList({
+      positionType: "bottom",
+      positionData: body.depth + 0.1 + braceBody.height,
+      children: [{
+        type: "elem",
+        elem: braceBody
+      }, {
+        type: "kern",
+        size: 0.1
+      }, {
+        type: "elem",
+        elem: body
+      }]
+    }, options); // $FlowFixMe: Replace this with passing "svg-align" into makeVList.
+
+    vlist.children[0].children[0].children[0].classes.push("svg-align");
+  }
+
+  if (supSubGroup) {
+    // To write the supsub, wrap the first vlist in another vlist:
+    // They can't all go in the same vlist, because the note might be
+    // wider than the equation. We want the equation to control the
+    // brace width.
+    //      note          long note           long note
+    //   ┏━━━━━━━━┓   or    ┏━━━┓     not    ┏━━━━━━━━━┓
+    //    equation           eqn                 eqn
+    var vSpan = buildCommon.makeSpan(["mord", group.isOver ? "mover" : "munder"], [vlist], options);
+
+    if (group.isOver) {
+      vlist = buildCommon.makeVList({
+        positionType: "firstBaseline",
+        children: [{
+          type: "elem",
+          elem: vSpan
+        }, {
+          type: "kern",
+          size: 0.2
+        }, {
+          type: "elem",
+          elem: supSubGroup
+        }]
+      }, options);
+    } else {
+      vlist = buildCommon.makeVList({
+        positionType: "bottom",
+        positionData: vSpan.depth + 0.2 + supSubGroup.height + supSubGroup.depth,
+        children: [{
+          type: "elem",
+          elem: supSubGroup
+        }, {
+          type: "kern",
+          size: 0.2
+        }, {
+          type: "elem",
+          elem: vSpan
+        }]
+      }, options);
+    }
+  }
+
+  return buildCommon.makeSpan(["mord", group.isOver ? "mover" : "munder"], [vlist], options);
+};
+
+var horizBrace_mathmlBuilder = function mathmlBuilder(group, options) {
+  var accentNode = stretchy.mathMLnode(group.label);
+  return new mathMLTree.MathNode(group.isOver ? "mover" : "munder", [buildMathML_buildGroup(group.base, options), accentNode]);
+}; // Horizontal stretchy braces
+
+
+defineFunction({
+  type: "horizBrace",
+  names: ["\\overbrace", "\\underbrace"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    return {
+      type: "horizBrace",
+      mode: parser.mode,
+      label: funcName,
+      isOver: /^\\over/.test(funcName),
+      base: args[0]
+    };
+  },
+  htmlBuilder: horizBrace_htmlBuilder,
+  mathmlBuilder: horizBrace_mathmlBuilder
+});
+;// CONCATENATED MODULE: ./src/functions/href.js
+
+
+
+
+
+
+defineFunction({
+  type: "href",
+  names: ["\\href"],
+  props: {
+    numArgs: 2,
+    argTypes: ["url", "original"],
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    var body = args[1];
+    var href = assertNodeType(args[0], "url").url;
+
+    if (!parser.settings.isTrusted({
+      command: "\\href",
+      url: href
+    })) {
+      return parser.formatUnsupportedCmd("\\href");
+    }
+
+    return {
+      type: "href",
+      mode: parser.mode,
+      href: href,
+      body: ordargument(body)
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var elements = buildExpression(group.body, options, false);
+    return buildCommon.makeAnchor(group.href, [], elements, options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var math = buildExpressionRow(group.body, options);
+
+    if (!(math instanceof MathNode)) {
+      math = new MathNode("mrow", [math]);
+    }
+
+    math.setAttribute("href", group.href);
+    return math;
+  }
+});
+defineFunction({
+  type: "href",
+  names: ["\\url"],
+  props: {
+    numArgs: 1,
+    argTypes: ["url"],
+    allowedInText: true
+  },
+  handler: function handler(_ref2, args) {
+    var parser = _ref2.parser;
+    var href = assertNodeType(args[0], "url").url;
+
+    if (!parser.settings.isTrusted({
+      command: "\\url",
+      url: href
+    })) {
+      return parser.formatUnsupportedCmd("\\url");
+    }
+
+    var chars = [];
+
+    for (var i = 0; i < href.length; i++) {
+      var c = href[i];
+
+      if (c === "~") {
+        c = "\\textasciitilde";
+      }
+
+      chars.push({
+        type: "textord",
+        mode: "text",
+        text: c
+      });
+    }
+
+    var body = {
+      type: "text",
+      mode: parser.mode,
+      font: "\\texttt",
+      body: chars
+    };
+    return {
+      type: "href",
+      mode: parser.mode,
+      href: href,
+      body: ordargument(body)
+    };
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/hbox.js
+
+
+
+
+ // \hbox is provided for compatibility with LaTeX \vcenter.
+// In LaTeX, \vcenter can act only on a box, as in
+// \vcenter{\hbox{$\frac{a+b}{\dfrac{c}{d}}$}}
+// This function by itself doesn't do anything but prevent a soft line break.
+
+defineFunction({
+  type: "hbox",
+  names: ["\\hbox"],
+  props: {
+    numArgs: 1,
+    argTypes: ["text"],
+    allowedInText: true,
+    primitive: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    return {
+      type: "hbox",
+      mode: parser.mode,
+      body: ordargument(args[0])
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var elements = buildExpression(group.body, options, false);
+    return buildCommon.makeFragment(elements);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    return new mathMLTree.MathNode("mrow", buildMathML_buildExpression(group.body, options));
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/html.js
+
+
+
+
+
+
+defineFunction({
+  type: "html",
+  names: ["\\htmlClass", "\\htmlId", "\\htmlStyle", "\\htmlData"],
+  props: {
+    numArgs: 2,
+    argTypes: ["raw", "original"],
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName,
+        token = _ref.token;
+    var value = assertNodeType(args[0], "raw").string;
+    var body = args[1];
+
+    if (parser.settings.strict) {
+      parser.settings.reportNonstrict("htmlExtension", "HTML extension is disabled on strict mode");
+    }
+
+    var trustContext;
+    var attributes = {};
+
+    switch (funcName) {
+      case "\\htmlClass":
+        attributes.class = value;
+        trustContext = {
+          command: "\\htmlClass",
+          class: value
+        };
+        break;
+
+      case "\\htmlId":
+        attributes.id = value;
+        trustContext = {
+          command: "\\htmlId",
+          id: value
+        };
+        break;
+
+      case "\\htmlStyle":
+        attributes.style = value;
+        trustContext = {
+          command: "\\htmlStyle",
+          style: value
+        };
+        break;
+
+      case "\\htmlData":
+        {
+          var data = value.split(",");
+
+          for (var i = 0; i < data.length; i++) {
+            var keyVal = data[i].split("=");
+
+            if (keyVal.length !== 2) {
+              throw new src_ParseError("Error parsing key-value for \\htmlData");
+            }
+
+            attributes["data-" + keyVal[0].trim()] = keyVal[1].trim();
+          }
+
+          trustContext = {
+            command: "\\htmlData",
+            attributes: attributes
+          };
+          break;
+        }
+
+      default:
+        throw new Error("Unrecognized html command");
+    }
+
+    if (!parser.settings.isTrusted(trustContext)) {
+      return parser.formatUnsupportedCmd(funcName);
+    }
+
+    return {
+      type: "html",
+      mode: parser.mode,
+      attributes: attributes,
+      body: ordargument(body)
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var elements = buildExpression(group.body, options, false);
+    var classes = ["enclosing"];
+
+    if (group.attributes.class) {
+      classes.push.apply(classes, group.attributes.class.trim().split(/\s+/));
+    }
+
+    var span = buildCommon.makeSpan(classes, elements, options);
+
+    for (var attr in group.attributes) {
+      if (attr !== "class" && group.attributes.hasOwnProperty(attr)) {
+        span.setAttribute(attr, group.attributes[attr]);
+      }
+    }
+
+    return span;
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    return buildExpressionRow(group.body, options);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/htmlmathml.js
+
+
+
+
+defineFunction({
+  type: "htmlmathml",
+  names: ["\\html@mathml"],
+  props: {
+    numArgs: 2,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    return {
+      type: "htmlmathml",
+      mode: parser.mode,
+      html: ordargument(args[0]),
+      mathml: ordargument(args[1])
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var elements = buildExpression(group.html, options, false);
+    return buildCommon.makeFragment(elements);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    return buildExpressionRow(group.mathml, options);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/includegraphics.js
+
+
+
+
+
+
+
+var sizeData = function sizeData(str) {
+  if (/^[-+]? *(\d+(\.\d*)?|\.\d+)$/.test(str)) {
+    // str is a number with no unit specified.
+    // default unit is bp, per graphix package.
+    return {
+      number: +str,
+      unit: "bp"
+    };
+  } else {
+    var match = /([-+]?) *(\d+(?:\.\d*)?|\.\d+) *([a-z]{2})/.exec(str);
+
+    if (!match) {
+      throw new src_ParseError("Invalid size: '" + str + "' in \\includegraphics");
+    }
+
+    var data = {
+      number: +(match[1] + match[2]),
+      // sign + magnitude, cast to number
+      unit: match[3]
+    };
+
+    if (!validUnit(data)) {
+      throw new src_ParseError("Invalid unit: '" + data.unit + "' in \\includegraphics.");
+    }
+
+    return data;
+  }
+};
+
+defineFunction({
+  type: "includegraphics",
+  names: ["\\includegraphics"],
+  props: {
+    numArgs: 1,
+    numOptionalArgs: 1,
+    argTypes: ["raw", "url"],
+    allowedInText: false
+  },
+  handler: function handler(_ref, args, optArgs) {
+    var parser = _ref.parser;
+    var width = {
+      number: 0,
+      unit: "em"
+    };
+    var height = {
+      number: 0.9,
+      unit: "em"
+    }; // sorta character sized.
+
+    var totalheight = {
+      number: 0,
+      unit: "em"
+    };
+    var alt = "";
+
+    if (optArgs[0]) {
+      var attributeStr = assertNodeType(optArgs[0], "raw").string; // Parser.js does not parse key/value pairs. We get a string.
+
+      var attributes = attributeStr.split(",");
+
+      for (var i = 0; i < attributes.length; i++) {
+        var keyVal = attributes[i].split("=");
+
+        if (keyVal.length === 2) {
+          var str = keyVal[1].trim();
+
+          switch (keyVal[0].trim()) {
+            case "alt":
+              alt = str;
+              break;
+
+            case "width":
+              width = sizeData(str);
+              break;
+
+            case "height":
+              height = sizeData(str);
+              break;
+
+            case "totalheight":
+              totalheight = sizeData(str);
+              break;
+
+            default:
+              throw new src_ParseError("Invalid key: '" + keyVal[0] + "' in \\includegraphics.");
+          }
+        }
+      }
+    }
+
+    var src = assertNodeType(args[0], "url").url;
+
+    if (alt === "") {
+      // No alt given. Use the file name. Strip away the path.
+      alt = src;
+      alt = alt.replace(/^.*[\\/]/, '');
+      alt = alt.substring(0, alt.lastIndexOf('.'));
+    }
+
+    if (!parser.settings.isTrusted({
+      command: "\\includegraphics",
+      url: src
+    })) {
+      return parser.formatUnsupportedCmd("\\includegraphics");
+    }
+
+    return {
+      type: "includegraphics",
+      mode: parser.mode,
+      alt: alt,
+      width: width,
+      height: height,
+      totalheight: totalheight,
+      src: src
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var height = calculateSize(group.height, options);
+    var depth = 0;
+
+    if (group.totalheight.number > 0) {
+      depth = calculateSize(group.totalheight, options) - height;
+    }
+
+    var width = 0;
+
+    if (group.width.number > 0) {
+      width = calculateSize(group.width, options);
+    }
+
+    var style = {
+      height: makeEm(height + depth)
+    };
+
+    if (width > 0) {
+      style.width = makeEm(width);
+    }
+
+    if (depth > 0) {
+      style.verticalAlign = makeEm(-depth);
+    }
+
+    var node = new Img(group.src, group.alt, style);
+    node.height = height;
+    node.depth = depth;
+    return node;
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var node = new mathMLTree.MathNode("mglyph", []);
+    node.setAttribute("alt", group.alt);
+    var height = calculateSize(group.height, options);
+    var depth = 0;
+
+    if (group.totalheight.number > 0) {
+      depth = calculateSize(group.totalheight, options) - height;
+      node.setAttribute("valign", makeEm(-depth));
+    }
+
+    node.setAttribute("height", makeEm(height + depth));
+
+    if (group.width.number > 0) {
+      var width = calculateSize(group.width, options);
+      node.setAttribute("width", makeEm(width));
+    }
+
+    node.setAttribute("src", group.src);
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/kern.js
+// Horizontal spacing commands
+
+
+
+
+ // TODO: \hskip and \mskip should support plus and minus in lengths
+
+defineFunction({
+  type: "kern",
+  names: ["\\kern", "\\mkern", "\\hskip", "\\mskip"],
+  props: {
+    numArgs: 1,
+    argTypes: ["size"],
+    primitive: true,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var size = assertNodeType(args[0], "size");
+
+    if (parser.settings.strict) {
+      var mathFunction = funcName[1] === 'm'; // \mkern, \mskip
+
+      var muUnit = size.value.unit === 'mu';
+
+      if (mathFunction) {
+        if (!muUnit) {
+          parser.settings.reportNonstrict("mathVsTextUnits", "LaTeX's " + funcName + " supports only mu units, " + ("not " + size.value.unit + " units"));
+        }
+
+        if (parser.mode !== "math") {
+          parser.settings.reportNonstrict("mathVsTextUnits", "LaTeX's " + funcName + " works only in math mode");
+        }
+      } else {
+        // !mathFunction
+        if (muUnit) {
+          parser.settings.reportNonstrict("mathVsTextUnits", "LaTeX's " + funcName + " doesn't support mu units");
+        }
+      }
+    }
+
+    return {
+      type: "kern",
+      mode: parser.mode,
+      dimension: size.value
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    return buildCommon.makeGlue(group.dimension, options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var dimension = calculateSize(group.dimension, options);
+    return new mathMLTree.SpaceNode(dimension);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/lap.js
+// Horizontal overlap functions
+
+
+
+
+
+
+defineFunction({
+  type: "lap",
+  names: ["\\mathllap", "\\mathrlap", "\\mathclap"],
+  props: {
+    numArgs: 1,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var body = args[0];
+    return {
+      type: "lap",
+      mode: parser.mode,
+      alignment: funcName.slice(5),
+      body: body
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    // mathllap, mathrlap, mathclap
+    var inner;
+
+    if (group.alignment === "clap") {
+      // ref: https://www.math.lsu.edu/~aperlis/publications/mathclap/
+      inner = buildCommon.makeSpan([], [buildGroup(group.body, options)]); // wrap, since CSS will center a .clap > .inner > span
+
+      inner = buildCommon.makeSpan(["inner"], [inner], options);
+    } else {
+      inner = buildCommon.makeSpan(["inner"], [buildGroup(group.body, options)]);
+    }
+
+    var fix = buildCommon.makeSpan(["fix"], []);
+    var node = buildCommon.makeSpan([group.alignment], [inner, fix], options); // At this point, we have correctly set horizontal alignment of the
+    // two items involved in the lap.
+    // Next, use a strut to set the height of the HTML bounding box.
+    // Otherwise, a tall argument may be misplaced.
+    // This code resolved issue #1153
+
+    var strut = buildCommon.makeSpan(["strut"]);
+    strut.style.height = makeEm(node.height + node.depth);
+
+    if (node.depth) {
+      strut.style.verticalAlign = makeEm(-node.depth);
+    }
+
+    node.children.unshift(strut); // Next, prevent vertical misplacement when next to something tall.
+    // This code resolves issue #1234
+
+    node = buildCommon.makeSpan(["thinbox"], [node], options);
+    return buildCommon.makeSpan(["mord", "vbox"], [node], options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    // mathllap, mathrlap, mathclap
+    var node = new mathMLTree.MathNode("mpadded", [buildMathML_buildGroup(group.body, options)]);
+
+    if (group.alignment !== "rlap") {
+      var offset = group.alignment === "llap" ? "-1" : "-0.5";
+      node.setAttribute("lspace", offset + "width");
+    }
+
+    node.setAttribute("width", "0px");
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/math.js
+
+ // Switching from text mode back to math mode
+
+defineFunction({
+  type: "styling",
+  names: ["\\(", "$"],
+  props: {
+    numArgs: 0,
+    allowedInText: true,
+    allowedInMath: false
+  },
+  handler: function handler(_ref, args) {
+    var funcName = _ref.funcName,
+        parser = _ref.parser;
+    var outerMode = parser.mode;
+    parser.switchMode("math");
+    var close = funcName === "\\(" ? "\\)" : "$";
+    var body = parser.parseExpression(false, close);
+    parser.expect(close);
+    parser.switchMode(outerMode);
+    return {
+      type: "styling",
+      mode: parser.mode,
+      style: "text",
+      body: body
+    };
+  }
+}); // Check for extra closing math delimiters
+
+defineFunction({
+  type: "text",
+  // Doesn't matter what this is.
+  names: ["\\)", "\\]"],
+  props: {
+    numArgs: 0,
+    allowedInText: true,
+    allowedInMath: false
+  },
+  handler: function handler(context, args) {
+    throw new src_ParseError("Mismatched " + context.funcName);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/mathchoice.js
+
+
+
+
+
+
+var chooseMathStyle = function chooseMathStyle(group, options) {
+  switch (options.style.size) {
+    case src_Style.DISPLAY.size:
+      return group.display;
+
+    case src_Style.TEXT.size:
+      return group.text;
+
+    case src_Style.SCRIPT.size:
+      return group.script;
+
+    case src_Style.SCRIPTSCRIPT.size:
+      return group.scriptscript;
+
+    default:
+      return group.text;
+  }
+};
+
+defineFunction({
+  type: "mathchoice",
+  names: ["\\mathchoice"],
+  props: {
+    numArgs: 4,
+    primitive: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    return {
+      type: "mathchoice",
+      mode: parser.mode,
+      display: ordargument(args[0]),
+      text: ordargument(args[1]),
+      script: ordargument(args[2]),
+      scriptscript: ordargument(args[3])
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var body = chooseMathStyle(group, options);
+    var elements = buildExpression(body, options, false);
+    return buildCommon.makeFragment(elements);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var body = chooseMathStyle(group, options);
+    return buildExpressionRow(body, options);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/utils/assembleSupSub.js
+
+
+
+ // For an operator with limits, assemble the base, sup, and sub into a span.
+
+var assembleSupSub = function assembleSupSub(base, supGroup, subGroup, options, style, slant, baseShift) {
+  base = buildCommon.makeSpan([], [base]);
+  var subIsSingleCharacter = subGroup && utils.isCharacterBox(subGroup);
+  var sub;
+  var sup; // We manually have to handle the superscripts and subscripts. This,
+  // aside from the kern calculations, is copied from supsub.
+
+  if (supGroup) {
+    var elem = buildGroup(supGroup, options.havingStyle(style.sup()), options);
+    sup = {
+      elem: elem,
+      kern: Math.max(options.fontMetrics().bigOpSpacing1, options.fontMetrics().bigOpSpacing3 - elem.depth)
+    };
+  }
+
+  if (subGroup) {
+    var _elem = buildGroup(subGroup, options.havingStyle(style.sub()), options);
+
+    sub = {
+      elem: _elem,
+      kern: Math.max(options.fontMetrics().bigOpSpacing2, options.fontMetrics().bigOpSpacing4 - _elem.height)
+    };
+  } // Build the final group as a vlist of the possible subscript, base,
+  // and possible superscript.
+
+
+  var finalGroup;
+
+  if (sup && sub) {
+    var bottom = options.fontMetrics().bigOpSpacing5 + sub.elem.height + sub.elem.depth + sub.kern + base.depth + baseShift;
+    finalGroup = buildCommon.makeVList({
+      positionType: "bottom",
+      positionData: bottom,
+      children: [{
+        type: "kern",
+        size: options.fontMetrics().bigOpSpacing5
+      }, {
+        type: "elem",
+        elem: sub.elem,
+        marginLeft: makeEm(-slant)
+      }, {
+        type: "kern",
+        size: sub.kern
+      }, {
+        type: "elem",
+        elem: base
+      }, {
+        type: "kern",
+        size: sup.kern
+      }, {
+        type: "elem",
+        elem: sup.elem,
+        marginLeft: makeEm(slant)
+      }, {
+        type: "kern",
+        size: options.fontMetrics().bigOpSpacing5
+      }]
+    }, options);
+  } else if (sub) {
+    var top = base.height - baseShift; // Shift the limits by the slant of the symbol. Note
+    // that we are supposed to shift the limits by 1/2 of the slant,
+    // but since we are centering the limits adding a full slant of
+    // margin will shift by 1/2 that.
+
+    finalGroup = buildCommon.makeVList({
+      positionType: "top",
+      positionData: top,
+      children: [{
+        type: "kern",
+        size: options.fontMetrics().bigOpSpacing5
+      }, {
+        type: "elem",
+        elem: sub.elem,
+        marginLeft: makeEm(-slant)
+      }, {
+        type: "kern",
+        size: sub.kern
+      }, {
+        type: "elem",
+        elem: base
+      }]
+    }, options);
+  } else if (sup) {
+    var _bottom = base.depth + baseShift;
+
+    finalGroup = buildCommon.makeVList({
+      positionType: "bottom",
+      positionData: _bottom,
+      children: [{
+        type: "elem",
+        elem: base
+      }, {
+        type: "kern",
+        size: sup.kern
+      }, {
+        type: "elem",
+        elem: sup.elem,
+        marginLeft: makeEm(slant)
+      }, {
+        type: "kern",
+        size: options.fontMetrics().bigOpSpacing5
+      }]
+    }, options);
+  } else {
+    // This case probably shouldn't occur (this would mean the
+    // supsub was sending us a group with no superscript or
+    // subscript) but be safe.
+    return base;
+  }
+
+  var parts = [finalGroup];
+
+  if (sub && slant !== 0 && !subIsSingleCharacter) {
+    // A negative margin-left was applied to the lower limit.
+    // Avoid an overlap by placing a spacer on the left on the group.
+    var spacer = buildCommon.makeSpan(["mspace"], [], options);
+    spacer.style.marginRight = makeEm(slant);
+    parts.unshift(spacer);
+  }
+
+  return buildCommon.makeSpan(["mop", "op-limits"], parts, options);
+};
+;// CONCATENATED MODULE: ./src/functions/op.js
+// Limits, symbols
+
+
+
+
+
+
+
+
+
+
+
+// Most operators have a large successor symbol, but these don't.
+var noSuccessor = ["\\smallint"]; // NOTE: Unlike most `htmlBuilder`s, this one handles not only "op", but also
+// "supsub" since some of them (like \int) can affect super/subscripting.
+
+var op_htmlBuilder = function htmlBuilder(grp, options) {
+  // Operators are handled in the TeXbook pg. 443-444, rule 13(a).
+  var supGroup;
+  var subGroup;
+  var hasLimits = false;
+  var group;
+
+  if (grp.type === "supsub") {
+    // If we have limits, supsub will pass us its group to handle. Pull
+    // out the superscript and subscript and set the group to the op in
+    // its base.
+    supGroup = grp.sup;
+    subGroup = grp.sub;
+    group = assertNodeType(grp.base, "op");
+    hasLimits = true;
+  } else {
+    group = assertNodeType(grp, "op");
+  }
+
+  var style = options.style;
+  var large = false;
+
+  if (style.size === src_Style.DISPLAY.size && group.symbol && !utils.contains(noSuccessor, group.name)) {
+    // Most symbol operators get larger in displaystyle (rule 13)
+    large = true;
+  }
+
+  var base;
+
+  if (group.symbol) {
+    // If this is a symbol, create the symbol.
+    var fontName = large ? "Size2-Regular" : "Size1-Regular";
+    var stash = "";
+
+    if (group.name === "\\oiint" || group.name === "\\oiiint") {
+      // No font glyphs yet, so use a glyph w/o the oval.
+      // TODO: When font glyphs are available, delete this code.
+      stash = group.name.slice(1);
+      group.name = stash === "oiint" ? "\\iint" : "\\iiint";
+    }
+
+    base = buildCommon.makeSymbol(group.name, fontName, "math", options, ["mop", "op-symbol", large ? "large-op" : "small-op"]);
+
+    if (stash.length > 0) {
+      // We're in \oiint or \oiiint. Overlay the oval.
+      // TODO: When font glyphs are available, delete this code.
+      var italic = base.italic;
+      var oval = buildCommon.staticSvg(stash + "Size" + (large ? "2" : "1"), options);
+      base = buildCommon.makeVList({
+        positionType: "individualShift",
+        children: [{
+          type: "elem",
+          elem: base,
+          shift: 0
+        }, {
+          type: "elem",
+          elem: oval,
+          shift: large ? 0.08 : 0
+        }]
+      }, options);
+      group.name = "\\" + stash;
+      base.classes.unshift("mop"); // $FlowFixMe
+
+      base.italic = italic;
+    }
+  } else if (group.body) {
+    // If this is a list, compose that list.
+    var inner = buildExpression(group.body, options, true);
+
+    if (inner.length === 1 && inner[0] instanceof SymbolNode) {
+      base = inner[0];
+      base.classes[0] = "mop"; // replace old mclass
+    } else {
+      base = buildCommon.makeSpan(["mop"], inner, options);
+    }
+  } else {
+    // Otherwise, this is a text operator. Build the text from the
+    // operator's name.
+    var output = [];
+
+    for (var i = 1; i < group.name.length; i++) {
+      output.push(buildCommon.mathsym(group.name[i], group.mode, options));
+    }
+
+    base = buildCommon.makeSpan(["mop"], output, options);
+  } // If content of op is a single symbol, shift it vertically.
+
+
+  var baseShift = 0;
+  var slant = 0;
+
+  if ((base instanceof SymbolNode || group.name === "\\oiint" || group.name === "\\oiiint") && !group.suppressBaseShift) {
+    // We suppress the shift of the base of \overset and \underset. Otherwise,
+    // shift the symbol so its center lies on the axis (rule 13). It
+    // appears that our fonts have the centers of the symbols already
+    // almost on the axis, so these numbers are very small. Note we
+    // don't actually apply this here, but instead it is used either in
+    // the vlist creation or separately when there are no limits.
+    baseShift = (base.height - base.depth) / 2 - options.fontMetrics().axisHeight; // The slant of the symbol is just its italic correction.
+    // $FlowFixMe
+
+    slant = base.italic;
+  }
+
+  if (hasLimits) {
+    return assembleSupSub(base, supGroup, subGroup, options, style, slant, baseShift);
+  } else {
+    if (baseShift) {
+      base.style.position = "relative";
+      base.style.top = makeEm(baseShift);
+    }
+
+    return base;
+  }
+};
+
+var op_mathmlBuilder = function mathmlBuilder(group, options) {
+  var node;
+
+  if (group.symbol) {
+    // This is a symbol. Just add the symbol.
+    node = new MathNode("mo", [makeText(group.name, group.mode)]);
+
+    if (utils.contains(noSuccessor, group.name)) {
+      node.setAttribute("largeop", "false");
+    }
+  } else if (group.body) {
+    // This is an operator with children. Add them.
+    node = new MathNode("mo", buildMathML_buildExpression(group.body, options));
+  } else {
+    // This is a text operator. Add all of the characters from the
+    // operator's name.
+    node = new MathNode("mi", [new TextNode(group.name.slice(1))]); // Append an ⁡.
+    // ref: https://www.w3.org/TR/REC-MathML/chap3_2.html#sec3.2.4
+
+    var operator = new MathNode("mo", [makeText("\u2061", "text")]);
+
+    if (group.parentIsSupSub) {
+      node = new MathNode("mrow", [node, operator]);
+    } else {
+      node = newDocumentFragment([node, operator]);
+    }
+  }
+
+  return node;
+};
+
+var singleCharBigOps = {
+  "\u220F": "\\prod",
+  "\u2210": "\\coprod",
+  "\u2211": "\\sum",
+  "\u22C0": "\\bigwedge",
+  "\u22C1": "\\bigvee",
+  "\u22C2": "\\bigcap",
+  "\u22C3": "\\bigcup",
+  "\u2A00": "\\bigodot",
+  "\u2A01": "\\bigoplus",
+  "\u2A02": "\\bigotimes",
+  "\u2A04": "\\biguplus",
+  "\u2A06": "\\bigsqcup"
+};
+defineFunction({
+  type: "op",
+  names: ["\\coprod", "\\bigvee", "\\bigwedge", "\\biguplus", "\\bigcap", "\\bigcup", "\\intop", "\\prod", "\\sum", "\\bigotimes", "\\bigoplus", "\\bigodot", "\\bigsqcup", "\\smallint", "\u220F", "\u2210", "\u2211", "\u22C0", "\u22C1", "\u22C2", "\u22C3", "\u2A00", "\u2A01", "\u2A02", "\u2A04", "\u2A06"],
+  props: {
+    numArgs: 0
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var fName = funcName;
+
+    if (fName.length === 1) {
+      fName = singleCharBigOps[fName];
+    }
+
+    return {
+      type: "op",
+      mode: parser.mode,
+      limits: true,
+      parentIsSupSub: false,
+      symbol: true,
+      name: fName
+    };
+  },
+  htmlBuilder: op_htmlBuilder,
+  mathmlBuilder: op_mathmlBuilder
+}); // Note: calling defineFunction with a type that's already been defined only
+// works because the same htmlBuilder and mathmlBuilder are being used.
+
+defineFunction({
+  type: "op",
+  names: ["\\mathop"],
+  props: {
+    numArgs: 1,
+    primitive: true
+  },
+  handler: function handler(_ref2, args) {
+    var parser = _ref2.parser;
+    var body = args[0];
+    return {
+      type: "op",
+      mode: parser.mode,
+      limits: false,
+      parentIsSupSub: false,
+      symbol: false,
+      body: ordargument(body)
+    };
+  },
+  htmlBuilder: op_htmlBuilder,
+  mathmlBuilder: op_mathmlBuilder
+}); // There are 2 flags for operators; whether they produce limits in
+// displaystyle, and whether they are symbols and should grow in
+// displaystyle. These four groups cover the four possible choices.
+
+var singleCharIntegrals = {
+  "\u222B": "\\int",
+  "\u222C": "\\iint",
+  "\u222D": "\\iiint",
+  "\u222E": "\\oint",
+  "\u222F": "\\oiint",
+  "\u2230": "\\oiiint"
+}; // No limits, not symbols
+
+defineFunction({
+  type: "op",
+  names: ["\\arcsin", "\\arccos", "\\arctan", "\\arctg", "\\arcctg", "\\arg", "\\ch", "\\cos", "\\cosec", "\\cosh", "\\cot", "\\cotg", "\\coth", "\\csc", "\\ctg", "\\cth", "\\deg", "\\dim", "\\exp", "\\hom", "\\ker", "\\lg", "\\ln", "\\log", "\\sec", "\\sin", "\\sinh", "\\sh", "\\tan", "\\tanh", "\\tg", "\\th"],
+  props: {
+    numArgs: 0
+  },
+  handler: function handler(_ref3) {
+    var parser = _ref3.parser,
+        funcName = _ref3.funcName;
+    return {
+      type: "op",
+      mode: parser.mode,
+      limits: false,
+      parentIsSupSub: false,
+      symbol: false,
+      name: funcName
+    };
+  },
+  htmlBuilder: op_htmlBuilder,
+  mathmlBuilder: op_mathmlBuilder
+}); // Limits, not symbols
+
+defineFunction({
+  type: "op",
+  names: ["\\det", "\\gcd", "\\inf", "\\lim", "\\max", "\\min", "\\Pr", "\\sup"],
+  props: {
+    numArgs: 0
+  },
+  handler: function handler(_ref4) {
+    var parser = _ref4.parser,
+        funcName = _ref4.funcName;
+    return {
+      type: "op",
+      mode: parser.mode,
+      limits: true,
+      parentIsSupSub: false,
+      symbol: false,
+      name: funcName
+    };
+  },
+  htmlBuilder: op_htmlBuilder,
+  mathmlBuilder: op_mathmlBuilder
+}); // No limits, symbols
+
+defineFunction({
+  type: "op",
+  names: ["\\int", "\\iint", "\\iiint", "\\oint", "\\oiint", "\\oiiint", "\u222B", "\u222C", "\u222D", "\u222E", "\u222F", "\u2230"],
+  props: {
+    numArgs: 0
+  },
+  handler: function handler(_ref5) {
+    var parser = _ref5.parser,
+        funcName = _ref5.funcName;
+    var fName = funcName;
+
+    if (fName.length === 1) {
+      fName = singleCharIntegrals[fName];
+    }
+
+    return {
+      type: "op",
+      mode: parser.mode,
+      limits: false,
+      parentIsSupSub: false,
+      symbol: true,
+      name: fName
+    };
+  },
+  htmlBuilder: op_htmlBuilder,
+  mathmlBuilder: op_mathmlBuilder
+});
+;// CONCATENATED MODULE: ./src/functions/operatorname.js
+
+
+
+
+
+
+
+
+
+// NOTE: Unlike most `htmlBuilder`s, this one handles not only
+// "operatorname", but also  "supsub" since \operatorname* can
+// affect super/subscripting.
+var operatorname_htmlBuilder = function htmlBuilder(grp, options) {
+  // Operators are handled in the TeXbook pg. 443-444, rule 13(a).
+  var supGroup;
+  var subGroup;
+  var hasLimits = false;
+  var group;
+
+  if (grp.type === "supsub") {
+    // If we have limits, supsub will pass us its group to handle. Pull
+    // out the superscript and subscript and set the group to the op in
+    // its base.
+    supGroup = grp.sup;
+    subGroup = grp.sub;
+    group = assertNodeType(grp.base, "operatorname");
+    hasLimits = true;
+  } else {
+    group = assertNodeType(grp, "operatorname");
+  }
+
+  var base;
+
+  if (group.body.length > 0) {
+    var body = group.body.map(function (child) {
+      // $FlowFixMe: Check if the node has a string `text` property.
+      var childText = child.text;
+
+      if (typeof childText === "string") {
+        return {
+          type: "textord",
+          mode: child.mode,
+          text: childText
+        };
+      } else {
+        return child;
+      }
+    }); // Consolidate function names into symbol characters.
+
+    var expression = buildExpression(body, options.withFont("mathrm"), true);
+
+    for (var i = 0; i < expression.length; i++) {
+      var child = expression[i];
+
+      if (child instanceof SymbolNode) {
+        // Per amsopn package,
+        // change minus to hyphen and \ast to asterisk
+        child.text = child.text.replace(/\u2212/, "-").replace(/\u2217/, "*");
+      }
+    }
+
+    base = buildCommon.makeSpan(["mop"], expression, options);
+  } else {
+    base = buildCommon.makeSpan(["mop"], [], options);
+  }
+
+  if (hasLimits) {
+    return assembleSupSub(base, supGroup, subGroup, options, options.style, 0, 0);
+  } else {
+    return base;
+  }
+};
+
+var operatorname_mathmlBuilder = function mathmlBuilder(group, options) {
+  // The steps taken here are similar to the html version.
+  var expression = buildMathML_buildExpression(group.body, options.withFont("mathrm")); // Is expression a string or has it something like a fraction?
+
+  var isAllString = true; // default
+
+  for (var i = 0; i < expression.length; i++) {
+    var node = expression[i];
+
+    if (node instanceof mathMLTree.SpaceNode) {// Do nothing
+    } else if (node instanceof mathMLTree.MathNode) {
+      switch (node.type) {
+        case "mi":
+        case "mn":
+        case "ms":
+        case "mspace":
+        case "mtext":
+          break;
+        // Do nothing yet.
+
+        case "mo":
+          {
+            var child = node.children[0];
+
+            if (node.children.length === 1 && child instanceof mathMLTree.TextNode) {
+              child.text = child.text.replace(/\u2212/, "-").replace(/\u2217/, "*");
+            } else {
+              isAllString = false;
+            }
+
+            break;
+          }
+
+        default:
+          isAllString = false;
+      }
+    } else {
+      isAllString = false;
+    }
+  }
+
+  if (isAllString) {
+    // Write a single TextNode instead of multiple nested tags.
+    var word = expression.map(function (node) {
+      return node.toText();
+    }).join("");
+    expression = [new mathMLTree.TextNode(word)];
+  }
+
+  var identifier = new mathMLTree.MathNode("mi", expression);
+  identifier.setAttribute("mathvariant", "normal"); // \u2061 is the same as ⁡
+  // ref: https://www.w3schools.com/charsets/ref_html_entities_a.asp
+
+  var operator = new mathMLTree.MathNode("mo", [makeText("\u2061", "text")]);
+
+  if (group.parentIsSupSub) {
+    return new mathMLTree.MathNode("mrow", [identifier, operator]);
+  } else {
+    return mathMLTree.newDocumentFragment([identifier, operator]);
+  }
+}; // \operatorname
+// amsopn.dtx: \mathop{#1\kern\z@\operator@font#3}\newmcodes@
+
+
+defineFunction({
+  type: "operatorname",
+  names: ["\\operatorname@", "\\operatornamewithlimits"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var body = args[0];
+    return {
+      type: "operatorname",
+      mode: parser.mode,
+      body: ordargument(body),
+      alwaysHandleSupSub: funcName === "\\operatornamewithlimits",
+      limits: false,
+      parentIsSupSub: false
+    };
+  },
+  htmlBuilder: operatorname_htmlBuilder,
+  mathmlBuilder: operatorname_mathmlBuilder
+});
+defineMacro("\\operatorname", "\\@ifstar\\operatornamewithlimits\\operatorname@");
+;// CONCATENATED MODULE: ./src/functions/ordgroup.js
+
+
+
+
+defineFunctionBuilders({
+  type: "ordgroup",
+  htmlBuilder: function htmlBuilder(group, options) {
+    if (group.semisimple) {
+      return buildCommon.makeFragment(buildExpression(group.body, options, false));
+    }
+
+    return buildCommon.makeSpan(["mord"], buildExpression(group.body, options, true), options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    return buildExpressionRow(group.body, options, true);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/overline.js
+
+
+
+
+
+defineFunction({
+  type: "overline",
+  names: ["\\overline"],
+  props: {
+    numArgs: 1
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    var body = args[0];
+    return {
+      type: "overline",
+      mode: parser.mode,
+      body: body
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    // Overlines are handled in the TeXbook pg 443, Rule 9.
+    // Build the inner group in the cramped style.
+    var innerGroup = buildGroup(group.body, options.havingCrampedStyle()); // Create the line above the body
+
+    var line = buildCommon.makeLineSpan("overline-line", options); // Generate the vlist, with the appropriate kerns
+
+    var defaultRuleThickness = options.fontMetrics().defaultRuleThickness;
+    var vlist = buildCommon.makeVList({
+      positionType: "firstBaseline",
+      children: [{
+        type: "elem",
+        elem: innerGroup
+      }, {
+        type: "kern",
+        size: 3 * defaultRuleThickness
+      }, {
+        type: "elem",
+        elem: line
+      }, {
+        type: "kern",
+        size: defaultRuleThickness
+      }]
+    }, options);
+    return buildCommon.makeSpan(["mord", "overline"], [vlist], options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var operator = new mathMLTree.MathNode("mo", [new mathMLTree.TextNode("\u203E")]);
+    operator.setAttribute("stretchy", "true");
+    var node = new mathMLTree.MathNode("mover", [buildMathML_buildGroup(group.body, options), operator]);
+    node.setAttribute("accent", "true");
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/phantom.js
+
+
+
+
+
+defineFunction({
+  type: "phantom",
+  names: ["\\phantom"],
+  props: {
+    numArgs: 1,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    var body = args[0];
+    return {
+      type: "phantom",
+      mode: parser.mode,
+      body: ordargument(body)
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var elements = buildExpression(group.body, options.withPhantom(), false); // \phantom isn't supposed to affect the elements it contains.
+    // See "color" for more details.
+
+    return buildCommon.makeFragment(elements);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var inner = buildMathML_buildExpression(group.body, options);
+    return new mathMLTree.MathNode("mphantom", inner);
+  }
+});
+defineFunction({
+  type: "hphantom",
+  names: ["\\hphantom"],
+  props: {
+    numArgs: 1,
+    allowedInText: true
+  },
+  handler: function handler(_ref2, args) {
+    var parser = _ref2.parser;
+    var body = args[0];
+    return {
+      type: "hphantom",
+      mode: parser.mode,
+      body: body
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var node = buildCommon.makeSpan([], [buildGroup(group.body, options.withPhantom())]);
+    node.height = 0;
+    node.depth = 0;
+
+    if (node.children) {
+      for (var i = 0; i < node.children.length; i++) {
+        node.children[i].height = 0;
+        node.children[i].depth = 0;
+      }
+    } // See smash for comment re: use of makeVList
+
+
+    node = buildCommon.makeVList({
+      positionType: "firstBaseline",
+      children: [{
+        type: "elem",
+        elem: node
+      }]
+    }, options); // For spacing, TeX treats \smash as a math group (same spacing as ord).
+
+    return buildCommon.makeSpan(["mord"], [node], options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var inner = buildMathML_buildExpression(ordargument(group.body), options);
+    var phantom = new mathMLTree.MathNode("mphantom", inner);
+    var node = new mathMLTree.MathNode("mpadded", [phantom]);
+    node.setAttribute("height", "0px");
+    node.setAttribute("depth", "0px");
+    return node;
+  }
+});
+defineFunction({
+  type: "vphantom",
+  names: ["\\vphantom"],
+  props: {
+    numArgs: 1,
+    allowedInText: true
+  },
+  handler: function handler(_ref3, args) {
+    var parser = _ref3.parser;
+    var body = args[0];
+    return {
+      type: "vphantom",
+      mode: parser.mode,
+      body: body
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var inner = buildCommon.makeSpan(["inner"], [buildGroup(group.body, options.withPhantom())]);
+    var fix = buildCommon.makeSpan(["fix"], []);
+    return buildCommon.makeSpan(["mord", "rlap"], [inner, fix], options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var inner = buildMathML_buildExpression(ordargument(group.body), options);
+    var phantom = new mathMLTree.MathNode("mphantom", inner);
+    var node = new mathMLTree.MathNode("mpadded", [phantom]);
+    node.setAttribute("width", "0px");
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/raisebox.js
+
+
+
+
+
+
+ // Box manipulation
+
+defineFunction({
+  type: "raisebox",
+  names: ["\\raisebox"],
+  props: {
+    numArgs: 2,
+    argTypes: ["size", "hbox"],
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    var amount = assertNodeType(args[0], "size").value;
+    var body = args[1];
+    return {
+      type: "raisebox",
+      mode: parser.mode,
+      dy: amount,
+      body: body
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var body = buildGroup(group.body, options);
+    var dy = calculateSize(group.dy, options);
+    return buildCommon.makeVList({
+      positionType: "shift",
+      positionData: -dy,
+      children: [{
+        type: "elem",
+        elem: body
+      }]
+    }, options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var node = new mathMLTree.MathNode("mpadded", [buildMathML_buildGroup(group.body, options)]);
+    var dy = group.dy.number + group.dy.unit;
+    node.setAttribute("voffset", dy);
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/relax.js
+
+defineFunction({
+  type: "internal",
+  names: ["\\relax"],
+  props: {
+    numArgs: 0,
+    allowedInText: true
+  },
+  handler: function handler(_ref) {
+    var parser = _ref.parser;
+    return {
+      type: "internal",
+      mode: parser.mode
+    };
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/rule.js
+
+
+
+
+
+defineFunction({
+  type: "rule",
+  names: ["\\rule"],
+  props: {
+    numArgs: 2,
+    numOptionalArgs: 1,
+    argTypes: ["size", "size", "size"]
+  },
+  handler: function handler(_ref, args, optArgs) {
+    var parser = _ref.parser;
+    var shift = optArgs[0];
+    var width = assertNodeType(args[0], "size");
+    var height = assertNodeType(args[1], "size");
+    return {
+      type: "rule",
+      mode: parser.mode,
+      shift: shift && assertNodeType(shift, "size").value,
+      width: width.value,
+      height: height.value
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    // Make an empty span for the rule
+    var rule = buildCommon.makeSpan(["mord", "rule"], [], options); // Calculate the shift, width, and height of the rule, and account for units
+
+    var width = calculateSize(group.width, options);
+    var height = calculateSize(group.height, options);
+    var shift = group.shift ? calculateSize(group.shift, options) : 0; // Style the rule to the right size
+
+    rule.style.borderRightWidth = makeEm(width);
+    rule.style.borderTopWidth = makeEm(height);
+    rule.style.bottom = makeEm(shift); // Record the height and width
+
+    rule.width = width;
+    rule.height = height + shift;
+    rule.depth = -shift; // Font size is the number large enough that the browser will
+    // reserve at least `absHeight` space above the baseline.
+    // The 1.125 factor was empirically determined
+
+    rule.maxFontSize = height * 1.125 * options.sizeMultiplier;
+    return rule;
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var width = calculateSize(group.width, options);
+    var height = calculateSize(group.height, options);
+    var shift = group.shift ? calculateSize(group.shift, options) : 0;
+    var color = options.color && options.getColor() || "black";
+    var rule = new mathMLTree.MathNode("mspace");
+    rule.setAttribute("mathbackground", color);
+    rule.setAttribute("width", makeEm(width));
+    rule.setAttribute("height", makeEm(height));
+    var wrapper = new mathMLTree.MathNode("mpadded", [rule]);
+
+    if (shift >= 0) {
+      wrapper.setAttribute("height", makeEm(shift));
+    } else {
+      wrapper.setAttribute("height", makeEm(shift));
+      wrapper.setAttribute("depth", makeEm(-shift));
+    }
+
+    wrapper.setAttribute("voffset", makeEm(shift));
+    return wrapper;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/sizing.js
+
+
+
+
+
+
+function sizingGroup(value, options, baseOptions) {
+  var inner = buildExpression(value, options, false);
+  var multiplier = options.sizeMultiplier / baseOptions.sizeMultiplier; // Add size-resetting classes to the inner list and set maxFontSize
+  // manually. Handle nested size changes.
+
+  for (var i = 0; i < inner.length; i++) {
+    var pos = inner[i].classes.indexOf("sizing");
+
+    if (pos < 0) {
+      Array.prototype.push.apply(inner[i].classes, options.sizingClasses(baseOptions));
+    } else if (inner[i].classes[pos + 1] === "reset-size" + options.size) {
+      // This is a nested size change: e.g., inner[i] is the "b" in
+      // `\Huge a \small b`. Override the old size (the `reset-` class)
+      // but not the new size.
+      inner[i].classes[pos + 1] = "reset-size" + baseOptions.size;
+    }
+
+    inner[i].height *= multiplier;
+    inner[i].depth *= multiplier;
+  }
+
+  return buildCommon.makeFragment(inner);
+}
+var sizeFuncs = ["\\tiny", "\\sixptsize", "\\scriptsize", "\\footnotesize", "\\small", "\\normalsize", "\\large", "\\Large", "\\LARGE", "\\huge", "\\Huge"];
+var sizing_htmlBuilder = function htmlBuilder(group, options) {
+  // Handle sizing operators like \Huge. Real TeX doesn't actually allow
+  // these functions inside of math expressions, so we do some special
+  // handling.
+  var newOptions = options.havingSize(group.size);
+  return sizingGroup(group.body, newOptions, options);
+};
+defineFunction({
+  type: "sizing",
+  names: sizeFuncs,
+  props: {
+    numArgs: 0,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var breakOnTokenText = _ref.breakOnTokenText,
+        funcName = _ref.funcName,
+        parser = _ref.parser;
+    var body = parser.parseExpression(false, breakOnTokenText);
+    return {
+      type: "sizing",
+      mode: parser.mode,
+      // Figure out what size to use based on the list of functions above
+      size: sizeFuncs.indexOf(funcName) + 1,
+      body: body
+    };
+  },
+  htmlBuilder: sizing_htmlBuilder,
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var newOptions = options.havingSize(group.size);
+    var inner = buildMathML_buildExpression(group.body, newOptions);
+    var node = new mathMLTree.MathNode("mstyle", inner); // TODO(emily): This doesn't produce the correct size for nested size
+    // changes, because we don't keep state of what style we're currently
+    // in, so we can't reset the size to normal before changing it.  Now
+    // that we're passing an options parameter we should be able to fix
+    // this.
+
+    node.setAttribute("mathsize", makeEm(newOptions.sizeMultiplier));
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/smash.js
+// smash, with optional [tb], as in AMS
+
+
+
+
+
+
+defineFunction({
+  type: "smash",
+  names: ["\\smash"],
+  props: {
+    numArgs: 1,
+    numOptionalArgs: 1,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args, optArgs) {
+    var parser = _ref.parser;
+    var smashHeight = false;
+    var smashDepth = false;
+    var tbArg = optArgs[0] && assertNodeType(optArgs[0], "ordgroup");
+
+    if (tbArg) {
+      // Optional [tb] argument is engaged.
+      // ref: amsmath: \renewcommand{\smash}[1][tb]{%
+      //               def\mb@t{\ht}\def\mb@b{\dp}\def\mb@tb{\ht\z@\z@\dp}%
+      var letter = "";
+
+      for (var i = 0; i < tbArg.body.length; ++i) {
+        var node = tbArg.body[i]; // $FlowFixMe: Not every node type has a `text` property.
+
+        letter = node.text;
+
+        if (letter === "t") {
+          smashHeight = true;
+        } else if (letter === "b") {
+          smashDepth = true;
+        } else {
+          smashHeight = false;
+          smashDepth = false;
+          break;
+        }
+      }
+    } else {
+      smashHeight = true;
+      smashDepth = true;
+    }
+
+    var body = args[0];
+    return {
+      type: "smash",
+      mode: parser.mode,
+      body: body,
+      smashHeight: smashHeight,
+      smashDepth: smashDepth
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var node = buildCommon.makeSpan([], [buildGroup(group.body, options)]);
+
+    if (!group.smashHeight && !group.smashDepth) {
+      return node;
+    }
+
+    if (group.smashHeight) {
+      node.height = 0; // In order to influence makeVList, we have to reset the children.
+
+      if (node.children) {
+        for (var i = 0; i < node.children.length; i++) {
+          node.children[i].height = 0;
+        }
+      }
+    }
+
+    if (group.smashDepth) {
+      node.depth = 0;
+
+      if (node.children) {
+        for (var _i = 0; _i < node.children.length; _i++) {
+          node.children[_i].depth = 0;
+        }
+      }
+    } // At this point, we've reset the TeX-like height and depth values.
+    // But the span still has an HTML line height.
+    // makeVList applies "display: table-cell", which prevents the browser
+    // from acting on that line height. So we'll call makeVList now.
+
+
+    var smashedNode = buildCommon.makeVList({
+      positionType: "firstBaseline",
+      children: [{
+        type: "elem",
+        elem: node
+      }]
+    }, options); // For spacing, TeX treats \hphantom as a math group (same spacing as ord).
+
+    return buildCommon.makeSpan(["mord"], [smashedNode], options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var node = new mathMLTree.MathNode("mpadded", [buildMathML_buildGroup(group.body, options)]);
+
+    if (group.smashHeight) {
+      node.setAttribute("height", "0px");
+    }
+
+    if (group.smashDepth) {
+      node.setAttribute("depth", "0px");
+    }
+
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/sqrt.js
+
+
+
+
+
+
+
+
+defineFunction({
+  type: "sqrt",
+  names: ["\\sqrt"],
+  props: {
+    numArgs: 1,
+    numOptionalArgs: 1
+  },
+  handler: function handler(_ref, args, optArgs) {
+    var parser = _ref.parser;
+    var index = optArgs[0];
+    var body = args[0];
+    return {
+      type: "sqrt",
+      mode: parser.mode,
+      body: body,
+      index: index
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    // Square roots are handled in the TeXbook pg. 443, Rule 11.
+    // First, we do the same steps as in overline to build the inner group
+    // and line
+    var inner = buildGroup(group.body, options.havingCrampedStyle());
+
+    if (inner.height === 0) {
+      // Render a small surd.
+      inner.height = options.fontMetrics().xHeight;
+    } // Some groups can return document fragments.  Handle those by wrapping
+    // them in a span.
+
+
+    inner = buildCommon.wrapFragment(inner, options); // Calculate the minimum size for the \surd delimiter
+
+    var metrics = options.fontMetrics();
+    var theta = metrics.defaultRuleThickness;
+    var phi = theta;
+
+    if (options.style.id < src_Style.TEXT.id) {
+      phi = options.fontMetrics().xHeight;
+    } // Calculate the clearance between the body and line
+
+
+    var lineClearance = theta + phi / 4;
+    var minDelimiterHeight = inner.height + inner.depth + lineClearance + theta; // Create a sqrt SVG of the required minimum size
+
+    var _delimiter$sqrtImage = delimiter.sqrtImage(minDelimiterHeight, options),
+        img = _delimiter$sqrtImage.span,
+        ruleWidth = _delimiter$sqrtImage.ruleWidth,
+        advanceWidth = _delimiter$sqrtImage.advanceWidth;
+
+    var delimDepth = img.height - ruleWidth; // Adjust the clearance based on the delimiter size
+
+    if (delimDepth > inner.height + inner.depth + lineClearance) {
+      lineClearance = (lineClearance + delimDepth - inner.height - inner.depth) / 2;
+    } // Shift the sqrt image
+
+
+    var imgShift = img.height - inner.height - lineClearance - ruleWidth;
+    inner.style.paddingLeft = makeEm(advanceWidth); // Overlay the image and the argument.
+
+    var body = buildCommon.makeVList({
+      positionType: "firstBaseline",
+      children: [{
+        type: "elem",
+        elem: inner,
+        wrapperClasses: ["svg-align"]
+      }, {
+        type: "kern",
+        size: -(inner.height + imgShift)
+      }, {
+        type: "elem",
+        elem: img
+      }, {
+        type: "kern",
+        size: ruleWidth
+      }]
+    }, options);
+
+    if (!group.index) {
+      return buildCommon.makeSpan(["mord", "sqrt"], [body], options);
+    } else {
+      // Handle the optional root index
+      // The index is always in scriptscript style
+      var newOptions = options.havingStyle(src_Style.SCRIPTSCRIPT);
+      var rootm = buildGroup(group.index, newOptions, options); // The amount the index is shifted by. This is taken from the TeX
+      // source, in the definition of `\r@@t`.
+
+      var toShift = 0.6 * (body.height - body.depth); // Build a VList with the superscript shifted up correctly
+
+      var rootVList = buildCommon.makeVList({
+        positionType: "shift",
+        positionData: -toShift,
+        children: [{
+          type: "elem",
+          elem: rootm
+        }]
+      }, options); // Add a class surrounding it so we can add on the appropriate
+      // kerning
+
+      var rootVListWrap = buildCommon.makeSpan(["root"], [rootVList]);
+      return buildCommon.makeSpan(["mord", "sqrt"], [rootVListWrap, body], options);
+    }
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var body = group.body,
+        index = group.index;
+    return index ? new mathMLTree.MathNode("mroot", [buildMathML_buildGroup(body, options), buildMathML_buildGroup(index, options)]) : new mathMLTree.MathNode("msqrt", [buildMathML_buildGroup(body, options)]);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/styling.js
+
+
+
+
+
+var styling_styleMap = {
+  "display": src_Style.DISPLAY,
+  "text": src_Style.TEXT,
+  "script": src_Style.SCRIPT,
+  "scriptscript": src_Style.SCRIPTSCRIPT
+};
+defineFunction({
+  type: "styling",
+  names: ["\\displaystyle", "\\textstyle", "\\scriptstyle", "\\scriptscriptstyle"],
+  props: {
+    numArgs: 0,
+    allowedInText: true,
+    primitive: true
+  },
+  handler: function handler(_ref, args) {
+    var breakOnTokenText = _ref.breakOnTokenText,
+        funcName = _ref.funcName,
+        parser = _ref.parser;
+    // parse out the implicit body
+    var body = parser.parseExpression(true, breakOnTokenText); // TODO: Refactor to avoid duplicating styleMap in multiple places (e.g.
+    // here and in buildHTML and de-dupe the enumeration of all the styles).
+    // $FlowFixMe: The names above exactly match the styles.
+
+    var style = funcName.slice(1, funcName.length - 5);
+    return {
+      type: "styling",
+      mode: parser.mode,
+      // Figure out what style to use by pulling out the style from
+      // the function name
+      style: style,
+      body: body
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    // Style changes are handled in the TeXbook on pg. 442, Rule 3.
+    var newStyle = styling_styleMap[group.style];
+    var newOptions = options.havingStyle(newStyle).withFont('');
+    return sizingGroup(group.body, newOptions, options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    // Figure out what style we're changing to.
+    var newStyle = styling_styleMap[group.style];
+    var newOptions = options.havingStyle(newStyle);
+    var inner = buildMathML_buildExpression(group.body, newOptions);
+    var node = new mathMLTree.MathNode("mstyle", inner);
+    var styleAttributes = {
+      "display": ["0", "true"],
+      "text": ["0", "false"],
+      "script": ["1", "false"],
+      "scriptscript": ["2", "false"]
+    };
+    var attr = styleAttributes[group.style];
+    node.setAttribute("scriptlevel", attr[0]);
+    node.setAttribute("displaystyle", attr[1]);
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/supsub.js
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+/**
+ * Sometimes, groups perform special rules when they have superscripts or
+ * subscripts attached to them. This function lets the `supsub` group know that
+ * Sometimes, groups perform special rules when they have superscripts or
+ * its inner element should handle the superscripts and subscripts instead of
+ * handling them itself.
+ */
+var htmlBuilderDelegate = function htmlBuilderDelegate(group, options) {
+  var base = group.base;
+
+  if (!base) {
+    return null;
+  } else if (base.type === "op") {
+    // Operators handle supsubs differently when they have limits
+    // (e.g. `\displaystyle\sum_2^3`)
+    var delegate = base.limits && (options.style.size === src_Style.DISPLAY.size || base.alwaysHandleSupSub);
+    return delegate ? op_htmlBuilder : null;
+  } else if (base.type === "operatorname") {
+    var _delegate = base.alwaysHandleSupSub && (options.style.size === src_Style.DISPLAY.size || base.limits);
+
+    return _delegate ? operatorname_htmlBuilder : null;
+  } else if (base.type === "accent") {
+    return utils.isCharacterBox(base.base) ? htmlBuilder : null;
+  } else if (base.type === "horizBrace") {
+    var isSup = !group.sub;
+    return isSup === base.isOver ? horizBrace_htmlBuilder : null;
+  } else {
+    return null;
+  }
+}; // Super scripts and subscripts, whose precise placement can depend on other
+// functions that precede them.
+
+
+defineFunctionBuilders({
+  type: "supsub",
+  htmlBuilder: function htmlBuilder(group, options) {
+    // Superscript and subscripts are handled in the TeXbook on page
+    // 445-446, rules 18(a-f).
+    // Here is where we defer to the inner group if it should handle
+    // superscripts and subscripts itself.
+    var builderDelegate = htmlBuilderDelegate(group, options);
+
+    if (builderDelegate) {
+      return builderDelegate(group, options);
+    }
+
+    var valueBase = group.base,
+        valueSup = group.sup,
+        valueSub = group.sub;
+    var base = buildGroup(valueBase, options);
+    var supm;
+    var subm;
+    var metrics = options.fontMetrics(); // Rule 18a
+
+    var supShift = 0;
+    var subShift = 0;
+    var isCharacterBox = valueBase && utils.isCharacterBox(valueBase);
+
+    if (valueSup) {
+      var newOptions = options.havingStyle(options.style.sup());
+      supm = buildGroup(valueSup, newOptions, options);
+
+      if (!isCharacterBox) {
+        supShift = base.height - newOptions.fontMetrics().supDrop * newOptions.sizeMultiplier / options.sizeMultiplier;
+      }
+    }
+
+    if (valueSub) {
+      var _newOptions = options.havingStyle(options.style.sub());
+
+      subm = buildGroup(valueSub, _newOptions, options);
+
+      if (!isCharacterBox) {
+        subShift = base.depth + _newOptions.fontMetrics().subDrop * _newOptions.sizeMultiplier / options.sizeMultiplier;
+      }
+    } // Rule 18c
+
+
+    var minSupShift;
+
+    if (options.style === src_Style.DISPLAY) {
+      minSupShift = metrics.sup1;
+    } else if (options.style.cramped) {
+      minSupShift = metrics.sup3;
+    } else {
+      minSupShift = metrics.sup2;
+    } // scriptspace is a font-size-independent size, so scale it
+    // appropriately for use as the marginRight.
+
+
+    var multiplier = options.sizeMultiplier;
+    var marginRight = makeEm(0.5 / metrics.ptPerEm / multiplier);
+    var marginLeft = null;
+
+    if (subm) {
+      // Subscripts shouldn't be shifted by the base's italic correction.
+      // Account for that by shifting the subscript back the appropriate
+      // amount. Note we only do this when the base is a single symbol.
+      var isOiint = group.base && group.base.type === "op" && group.base.name && (group.base.name === "\\oiint" || group.base.name === "\\oiiint");
+
+      if (base instanceof SymbolNode || isOiint) {
+        // $FlowFixMe
+        marginLeft = makeEm(-base.italic);
+      }
+    }
+
+    var supsub;
+
+    if (supm && subm) {
+      supShift = Math.max(supShift, minSupShift, supm.depth + 0.25 * metrics.xHeight);
+      subShift = Math.max(subShift, metrics.sub2);
+      var ruleWidth = metrics.defaultRuleThickness; // Rule 18e
+
+      var maxWidth = 4 * ruleWidth;
+
+      if (supShift - supm.depth - (subm.height - subShift) < maxWidth) {
+        subShift = maxWidth - (supShift - supm.depth) + subm.height;
+        var psi = 0.8 * metrics.xHeight - (supShift - supm.depth);
+
+        if (psi > 0) {
+          supShift += psi;
+          subShift -= psi;
+        }
+      }
+
+      var vlistElem = [{
+        type: "elem",
+        elem: subm,
+        shift: subShift,
+        marginRight: marginRight,
+        marginLeft: marginLeft
+      }, {
+        type: "elem",
+        elem: supm,
+        shift: -supShift,
+        marginRight: marginRight
+      }];
+      supsub = buildCommon.makeVList({
+        positionType: "individualShift",
+        children: vlistElem
+      }, options);
+    } else if (subm) {
+      // Rule 18b
+      subShift = Math.max(subShift, metrics.sub1, subm.height - 0.8 * metrics.xHeight);
+      var _vlistElem = [{
+        type: "elem",
+        elem: subm,
+        marginLeft: marginLeft,
+        marginRight: marginRight
+      }];
+      supsub = buildCommon.makeVList({
+        positionType: "shift",
+        positionData: subShift,
+        children: _vlistElem
+      }, options);
+    } else if (supm) {
+      // Rule 18c, d
+      supShift = Math.max(supShift, minSupShift, supm.depth + 0.25 * metrics.xHeight);
+      supsub = buildCommon.makeVList({
+        positionType: "shift",
+        positionData: -supShift,
+        children: [{
+          type: "elem",
+          elem: supm,
+          marginRight: marginRight
+        }]
+      }, options);
+    } else {
+      throw new Error("supsub must have either sup or sub.");
+    } // Wrap the supsub vlist in a span.msupsub to reset text-align.
+
+
+    var mclass = getTypeOfDomTree(base, "right") || "mord";
+    return buildCommon.makeSpan([mclass], [base, buildCommon.makeSpan(["msupsub"], [supsub])], options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    // Is the inner group a relevant horizonal brace?
+    var isBrace = false;
+    var isOver;
+    var isSup;
+
+    if (group.base && group.base.type === "horizBrace") {
+      isSup = !!group.sup;
+
+      if (isSup === group.base.isOver) {
+        isBrace = true;
+        isOver = group.base.isOver;
+      }
+    }
+
+    if (group.base && (group.base.type === "op" || group.base.type === "operatorname")) {
+      group.base.parentIsSupSub = true;
+    }
+
+    var children = [buildMathML_buildGroup(group.base, options)];
+
+    if (group.sub) {
+      children.push(buildMathML_buildGroup(group.sub, options));
+    }
+
+    if (group.sup) {
+      children.push(buildMathML_buildGroup(group.sup, options));
+    }
+
+    var nodeType;
+
+    if (isBrace) {
+      nodeType = isOver ? "mover" : "munder";
+    } else if (!group.sub) {
+      var base = group.base;
+
+      if (base && base.type === "op" && base.limits && (options.style === src_Style.DISPLAY || base.alwaysHandleSupSub)) {
+        nodeType = "mover";
+      } else if (base && base.type === "operatorname" && base.alwaysHandleSupSub && (base.limits || options.style === src_Style.DISPLAY)) {
+        nodeType = "mover";
+      } else {
+        nodeType = "msup";
+      }
+    } else if (!group.sup) {
+      var _base = group.base;
+
+      if (_base && _base.type === "op" && _base.limits && (options.style === src_Style.DISPLAY || _base.alwaysHandleSupSub)) {
+        nodeType = "munder";
+      } else if (_base && _base.type === "operatorname" && _base.alwaysHandleSupSub && (_base.limits || options.style === src_Style.DISPLAY)) {
+        nodeType = "munder";
+      } else {
+        nodeType = "msub";
+      }
+    } else {
+      var _base2 = group.base;
+
+      if (_base2 && _base2.type === "op" && _base2.limits && options.style === src_Style.DISPLAY) {
+        nodeType = "munderover";
+      } else if (_base2 && _base2.type === "operatorname" && _base2.alwaysHandleSupSub && (options.style === src_Style.DISPLAY || _base2.limits)) {
+        nodeType = "munderover";
+      } else {
+        nodeType = "msubsup";
+      }
+    }
+
+    return new mathMLTree.MathNode(nodeType, children);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/symbolsOp.js
+
+
+
+ // Operator ParseNodes created in Parser.js from symbol Groups in src/symbols.js.
+
+defineFunctionBuilders({
+  type: "atom",
+  htmlBuilder: function htmlBuilder(group, options) {
+    return buildCommon.mathsym(group.text, group.mode, options, ["m" + group.family]);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var node = new mathMLTree.MathNode("mo", [makeText(group.text, group.mode)]);
+
+    if (group.family === "bin") {
+      var variant = getVariant(group, options);
+
+      if (variant === "bold-italic") {
+        node.setAttribute("mathvariant", variant);
+      }
+    } else if (group.family === "punct") {
+      node.setAttribute("separator", "true");
+    } else if (group.family === "open" || group.family === "close") {
+      // Delims built here should not stretch vertically.
+      // See delimsizing.js for stretchy delims.
+      node.setAttribute("stretchy", "false");
+    }
+
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/symbolsOrd.js
+
+
+
+
+// "mathord" and "textord" ParseNodes created in Parser.js from symbol Groups in
+// src/symbols.js.
+var defaultVariant = {
+  "mi": "italic",
+  "mn": "normal",
+  "mtext": "normal"
+};
+defineFunctionBuilders({
+  type: "mathord",
+  htmlBuilder: function htmlBuilder(group, options) {
+    return buildCommon.makeOrd(group, options, "mathord");
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var node = new mathMLTree.MathNode("mi", [makeText(group.text, group.mode, options)]);
+    var variant = getVariant(group, options) || "italic";
+
+    if (variant !== defaultVariant[node.type]) {
+      node.setAttribute("mathvariant", variant);
+    }
+
+    return node;
+  }
+});
+defineFunctionBuilders({
+  type: "textord",
+  htmlBuilder: function htmlBuilder(group, options) {
+    return buildCommon.makeOrd(group, options, "textord");
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var text = makeText(group.text, group.mode, options);
+    var variant = getVariant(group, options) || "normal";
+    var node;
+
+    if (group.mode === 'text') {
+      node = new mathMLTree.MathNode("mtext", [text]);
+    } else if (/[0-9]/.test(group.text)) {
+      node = new mathMLTree.MathNode("mn", [text]);
+    } else if (group.text === "\\prime") {
+      node = new mathMLTree.MathNode("mo", [text]);
+    } else {
+      node = new mathMLTree.MathNode("mi", [text]);
+    }
+
+    if (variant !== defaultVariant[node.type]) {
+      node.setAttribute("mathvariant", variant);
+    }
+
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/symbolsSpacing.js
+
+
+
+ // A map of CSS-based spacing functions to their CSS class.
+
+var cssSpace = {
+  "\\nobreak": "nobreak",
+  "\\allowbreak": "allowbreak"
+}; // A lookup table to determine whether a spacing function/symbol should be
+// treated like a regular space character.  If a symbol or command is a key
+// in this table, then it should be a regular space character.  Furthermore,
+// the associated value may have a `className` specifying an extra CSS class
+// to add to the created `span`.
+
+var regularSpace = {
+  " ": {},
+  "\\ ": {},
+  "~": {
+    className: "nobreak"
+  },
+  "\\space": {},
+  "\\nobreakspace": {
+    className: "nobreak"
+  }
+}; // ParseNode<"spacing"> created in Parser.js from the "spacing" symbol Groups in
+// src/symbols.js.
+
+defineFunctionBuilders({
+  type: "spacing",
+  htmlBuilder: function htmlBuilder(group, options) {
+    if (regularSpace.hasOwnProperty(group.text)) {
+      var className = regularSpace[group.text].className || ""; // Spaces are generated by adding an actual space. Each of these
+      // things has an entry in the symbols table, so these will be turned
+      // into appropriate outputs.
+
+      if (group.mode === "text") {
+        var ord = buildCommon.makeOrd(group, options, "textord");
+        ord.classes.push(className);
+        return ord;
+      } else {
+        return buildCommon.makeSpan(["mspace", className], [buildCommon.mathsym(group.text, group.mode, options)], options);
+      }
+    } else if (cssSpace.hasOwnProperty(group.text)) {
+      // Spaces based on just a CSS class.
+      return buildCommon.makeSpan(["mspace", cssSpace[group.text]], [], options);
+    } else {
+      throw new src_ParseError("Unknown type of space \"" + group.text + "\"");
+    }
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var node;
+
+    if (regularSpace.hasOwnProperty(group.text)) {
+      node = new mathMLTree.MathNode("mtext", [new mathMLTree.TextNode("\xA0")]);
+    } else if (cssSpace.hasOwnProperty(group.text)) {
+      // CSS-based MathML spaces (\nobreak, \allowbreak) are ignored
+      return new mathMLTree.MathNode("mspace");
+    } else {
+      throw new src_ParseError("Unknown type of space \"" + group.text + "\"");
+    }
+
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/tag.js
+
+
+
+
+var pad = function pad() {
+  var padNode = new mathMLTree.MathNode("mtd", []);
+  padNode.setAttribute("width", "50%");
+  return padNode;
+};
+
+defineFunctionBuilders({
+  type: "tag",
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var table = new mathMLTree.MathNode("mtable", [new mathMLTree.MathNode("mtr", [pad(), new mathMLTree.MathNode("mtd", [buildExpressionRow(group.body, options)]), pad(), new mathMLTree.MathNode("mtd", [buildExpressionRow(group.tag, options)])])]);
+    table.setAttribute("width", "100%");
+    return table; // TODO: Left-aligned tags.
+    // Currently, the group and options passed here do not contain
+    // enough info to set tag alignment. `leqno` is in Settings but it is
+    // not passed to Options. On the HTML side, leqno is
+    // set by a CSS class applied in buildTree.js. That would have worked
+    // in MathML if browsers supported . Since they don't, we
+    // need to rewrite the way this function is called.
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/text.js
+
+
+
+ // Non-mathy text, possibly in a font
+
+var textFontFamilies = {
+  "\\text": undefined,
+  "\\textrm": "textrm",
+  "\\textsf": "textsf",
+  "\\texttt": "texttt",
+  "\\textnormal": "textrm"
+};
+var textFontWeights = {
+  "\\textbf": "textbf",
+  "\\textmd": "textmd"
+};
+var textFontShapes = {
+  "\\textit": "textit",
+  "\\textup": "textup"
+};
+
+var optionsWithFont = function optionsWithFont(group, options) {
+  var font = group.font; // Checks if the argument is a font family or a font style.
+
+  if (!font) {
+    return options;
+  } else if (textFontFamilies[font]) {
+    return options.withTextFontFamily(textFontFamilies[font]);
+  } else if (textFontWeights[font]) {
+    return options.withTextFontWeight(textFontWeights[font]);
+  } else {
+    return options.withTextFontShape(textFontShapes[font]);
+  }
+};
+
+defineFunction({
+  type: "text",
+  names: [// Font families
+  "\\text", "\\textrm", "\\textsf", "\\texttt", "\\textnormal", // Font weights
+  "\\textbf", "\\textmd", // Font Shapes
+  "\\textit", "\\textup"],
+  props: {
+    numArgs: 1,
+    argTypes: ["text"],
+    allowedInArgument: true,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser,
+        funcName = _ref.funcName;
+    var body = args[0];
+    return {
+      type: "text",
+      mode: parser.mode,
+      body: ordargument(body),
+      font: funcName
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var newOptions = optionsWithFont(group, options);
+    var inner = buildExpression(group.body, newOptions, true);
+    return buildCommon.makeSpan(["mord", "text"], inner, newOptions);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var newOptions = optionsWithFont(group, options);
+    return buildExpressionRow(group.body, newOptions);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/underline.js
+
+
+
+
+
+defineFunction({
+  type: "underline",
+  names: ["\\underline"],
+  props: {
+    numArgs: 1,
+    allowedInText: true
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    return {
+      type: "underline",
+      mode: parser.mode,
+      body: args[0]
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    // Underlines are handled in the TeXbook pg 443, Rule 10.
+    // Build the inner group.
+    var innerGroup = buildGroup(group.body, options); // Create the line to go below the body
+
+    var line = buildCommon.makeLineSpan("underline-line", options); // Generate the vlist, with the appropriate kerns
+
+    var defaultRuleThickness = options.fontMetrics().defaultRuleThickness;
+    var vlist = buildCommon.makeVList({
+      positionType: "top",
+      positionData: innerGroup.height,
+      children: [{
+        type: "kern",
+        size: defaultRuleThickness
+      }, {
+        type: "elem",
+        elem: line
+      }, {
+        type: "kern",
+        size: 3 * defaultRuleThickness
+      }, {
+        type: "elem",
+        elem: innerGroup
+      }]
+    }, options);
+    return buildCommon.makeSpan(["mord", "underline"], [vlist], options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var operator = new mathMLTree.MathNode("mo", [new mathMLTree.TextNode("\u203E")]);
+    operator.setAttribute("stretchy", "true");
+    var node = new mathMLTree.MathNode("munder", [buildMathML_buildGroup(group.body, options), operator]);
+    node.setAttribute("accentunder", "true");
+    return node;
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/vcenter.js
+
+
+
+
+ // \vcenter:  Vertically center the argument group on the math axis.
+
+defineFunction({
+  type: "vcenter",
+  names: ["\\vcenter"],
+  props: {
+    numArgs: 1,
+    argTypes: ["original"],
+    // In LaTeX, \vcenter can act only on a box.
+    allowedInText: false
+  },
+  handler: function handler(_ref, args) {
+    var parser = _ref.parser;
+    return {
+      type: "vcenter",
+      mode: parser.mode,
+      body: args[0]
+    };
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var body = buildGroup(group.body, options);
+    var axisHeight = options.fontMetrics().axisHeight;
+    var dy = 0.5 * (body.height - axisHeight - (body.depth + axisHeight));
+    return buildCommon.makeVList({
+      positionType: "shift",
+      positionData: dy,
+      children: [{
+        type: "elem",
+        elem: body
+      }]
+    }, options);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    // There is no way to do this in MathML.
+    // Write a class as a breadcrumb in case some post-processor wants
+    // to perform a vcenter adjustment.
+    return new mathMLTree.MathNode("mpadded", [buildMathML_buildGroup(group.body, options)], ["vcenter"]);
+  }
+});
+;// CONCATENATED MODULE: ./src/functions/verb.js
+
+
+
+
+defineFunction({
+  type: "verb",
+  names: ["\\verb"],
+  props: {
+    numArgs: 0,
+    allowedInText: true
+  },
+  handler: function handler(context, args, optArgs) {
+    // \verb and \verb* are dealt with directly in Parser.js.
+    // If we end up here, it's because of a failure to match the two delimiters
+    // in the regex in Lexer.js.  LaTeX raises the following error when \verb is
+    // terminated by end of line (or file).
+    throw new src_ParseError("\\verb ended by end of line instead of matching delimiter");
+  },
+  htmlBuilder: function htmlBuilder(group, options) {
+    var text = makeVerb(group);
+    var body = []; // \verb enters text mode and therefore is sized like \textstyle
+
+    var newOptions = options.havingStyle(options.style.text());
+
+    for (var i = 0; i < text.length; i++) {
+      var c = text[i];
+
+      if (c === '~') {
+        c = '\\textasciitilde';
+      }
+
+      body.push(buildCommon.makeSymbol(c, "Typewriter-Regular", group.mode, newOptions, ["mord", "texttt"]));
+    }
+
+    return buildCommon.makeSpan(["mord", "text"].concat(newOptions.sizingClasses(options)), buildCommon.tryCombineChars(body), newOptions);
+  },
+  mathmlBuilder: function mathmlBuilder(group, options) {
+    var text = new mathMLTree.TextNode(makeVerb(group));
+    var node = new mathMLTree.MathNode("mtext", [text]);
+    node.setAttribute("mathvariant", "monospace");
+    return node;
+  }
+});
+/**
+ * Converts verb group into body string.
+ *
+ * \verb* replaces each space with an open box \u2423
+ * \verb replaces each space with a no-break space \xA0
+ */
+
+var makeVerb = function makeVerb(group) {
+  return group.body.replace(/ /g, group.star ? "\u2423" : '\xA0');
+};
+;// CONCATENATED MODULE: ./src/functions.js
+/** Include this to ensure that all functions are defined. */
+
+var functions = _functions;
+/* harmony default export */ var src_functions = (functions); // TODO(kevinb): have functions return an object and call defineFunction with
+// that object in this file instead of relying on side-effects.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+;// CONCATENATED MODULE: ./src/Lexer.js
+/**
+ * The Lexer class handles tokenizing the input in various ways. Since our
+ * parser expects us to be able to backtrack, the lexer allows lexing from any
+ * given starting point.
+ *
+ * Its main exposed function is the `lex` function, which takes a position to
+ * lex from and a type of token to lex. It defers to the appropriate `_innerLex`
+ * function.
+ *
+ * The various `_innerLex` functions perform the actual lexing of different
+ * kinds.
+ */
+
+
+
+
+/* The following tokenRegex
+ * - matches typical whitespace (but not NBSP etc.) using its first group
+ * - does not match any control character \x00-\x1f except whitespace
+ * - does not match a bare backslash
+ * - matches any ASCII character except those just mentioned
+ * - does not match the BMP private use area \uE000-\uF8FF
+ * - does not match bare surrogate code units
+ * - matches any BMP character except for those just described
+ * - matches any valid Unicode surrogate pair
+ * - matches a backslash followed by one or more whitespace characters
+ * - matches a backslash followed by one or more letters then whitespace
+ * - matches a backslash followed by any BMP character
+ * Capturing groups:
+ *   [1] regular whitespace
+ *   [2] backslash followed by whitespace
+ *   [3] anything else, which may include:
+ *     [4] left character of \verb*
+ *     [5] left character of \verb
+ *     [6] backslash followed by word, excluding any trailing whitespace
+ * Just because the Lexer matches something doesn't mean it's valid input:
+ * If there is no matching function or symbol definition, the Parser will
+ * still reject the input.
+ */
+var spaceRegexString = "[ \r\n\t]";
+var controlWordRegexString = "\\\\[a-zA-Z@]+";
+var controlSymbolRegexString = "\\\\[^\uD800-\uDFFF]";
+var controlWordWhitespaceRegexString = "(" + controlWordRegexString + ")" + spaceRegexString + "*";
+var controlSpaceRegexString = "\\\\(\n|[ \r\t]+\n?)[ \r\t]*";
+var combiningDiacriticalMarkString = "[\u0300-\u036F]";
+var combiningDiacriticalMarksEndRegex = new RegExp(combiningDiacriticalMarkString + "+$");
+var tokenRegexString = "(" + spaceRegexString + "+)|" + ( // whitespace
+controlSpaceRegexString + "|") + // \whitespace
+"([!-\\[\\]-\u2027\u202A-\uD7FF\uF900-\uFFFF]" + ( // single codepoint
+combiningDiacriticalMarkString + "*") + // ...plus accents
+"|[\uD800-\uDBFF][\uDC00-\uDFFF]" + ( // surrogate pair
+combiningDiacriticalMarkString + "*") + // ...plus accents
+"|\\\\verb\\*([^]).*?\\4" + // \verb*
+"|\\\\verb([^*a-zA-Z]).*?\\5" + ( // \verb unstarred
+"|" + controlWordWhitespaceRegexString) + ( // \macroName + spaces
+"|" + controlSymbolRegexString + ")"); // \\, \', etc.
+
+/** Main Lexer class */
+
+var Lexer = /*#__PURE__*/function () {
+  // Category codes. The lexer only supports comment characters (14) for now.
+  // MacroExpander additionally distinguishes active (13).
+  function Lexer(input, settings) {
+    this.input = void 0;
+    this.settings = void 0;
+    this.tokenRegex = void 0;
+    this.catcodes = void 0;
+    // Separate accents from characters
+    this.input = input;
+    this.settings = settings;
+    this.tokenRegex = new RegExp(tokenRegexString, 'g');
+    this.catcodes = {
+      "%": 14,
+      // comment character
+      "~": 13 // active character
+
+    };
+  }
+
+  var _proto = Lexer.prototype;
+
+  _proto.setCatcode = function setCatcode(char, code) {
+    this.catcodes[char] = code;
+  }
+  /**
+   * This function lexes a single token.
+   */
+  ;
+
+  _proto.lex = function lex() {
+    var input = this.input;
+    var pos = this.tokenRegex.lastIndex;
+
+    if (pos === input.length) {
+      return new Token("EOF", new SourceLocation(this, pos, pos));
+    }
+
+    var match = this.tokenRegex.exec(input);
+
+    if (match === null || match.index !== pos) {
+      throw new src_ParseError("Unexpected character: '" + input[pos] + "'", new Token(input[pos], new SourceLocation(this, pos, pos + 1)));
+    }
+
+    var text = match[6] || match[3] || (match[2] ? "\\ " : " ");
+
+    if (this.catcodes[text] === 14) {
+      // comment character
+      var nlIndex = input.indexOf('\n', this.tokenRegex.lastIndex);
+
+      if (nlIndex === -1) {
+        this.tokenRegex.lastIndex = input.length; // EOF
+
+        this.settings.reportNonstrict("commentAtEnd", "% comment has no terminating newline; LaTeX would " + "fail because of commenting the end of math mode (e.g. $)");
+      } else {
+        this.tokenRegex.lastIndex = nlIndex + 1;
+      }
+
+      return this.lex();
+    }
+
+    return new Token(text, new SourceLocation(this, pos, this.tokenRegex.lastIndex));
+  };
+
+  return Lexer;
+}();
+
+
+;// CONCATENATED MODULE: ./src/Namespace.js
+/**
+ * A `Namespace` refers to a space of nameable things like macros or lengths,
+ * which can be `set` either globally or local to a nested group, using an
+ * undo stack similar to how TeX implements this functionality.
+ * Performance-wise, `get` and local `set` take constant time, while global
+ * `set` takes time proportional to the depth of group nesting.
+ */
+
+
+var Namespace = /*#__PURE__*/function () {
+  /**
+   * Both arguments are optional.  The first argument is an object of
+   * built-in mappings which never change.  The second argument is an object
+   * of initial (global-level) mappings, which will constantly change
+   * according to any global/top-level `set`s done.
+   */
+  function Namespace(builtins, globalMacros) {
+    if (builtins === void 0) {
+      builtins = {};
+    }
+
+    if (globalMacros === void 0) {
+      globalMacros = {};
+    }
+
+    this.current = void 0;
+    this.builtins = void 0;
+    this.undefStack = void 0;
+    this.current = globalMacros;
+    this.builtins = builtins;
+    this.undefStack = [];
+  }
+  /**
+   * Start a new nested group, affecting future local `set`s.
+   */
+
+
+  var _proto = Namespace.prototype;
+
+  _proto.beginGroup = function beginGroup() {
+    this.undefStack.push({});
+  }
+  /**
+   * End current nested group, restoring values before the group began.
+   */
+  ;
+
+  _proto.endGroup = function endGroup() {
+    if (this.undefStack.length === 0) {
+      throw new src_ParseError("Unbalanced namespace destruction: attempt " + "to pop global namespace; please report this as a bug");
+    }
+
+    var undefs = this.undefStack.pop();
+
+    for (var undef in undefs) {
+      if (undefs.hasOwnProperty(undef)) {
+        if (undefs[undef] == null) {
+          delete this.current[undef];
+        } else {
+          this.current[undef] = undefs[undef];
+        }
+      }
+    }
+  }
+  /**
+   * Ends all currently nested groups (if any), restoring values before the
+   * groups began.  Useful in case of an error in the middle of parsing.
+   */
+  ;
+
+  _proto.endGroups = function endGroups() {
+    while (this.undefStack.length > 0) {
+      this.endGroup();
+    }
+  }
+  /**
+   * Detect whether `name` has a definition.  Equivalent to
+   * `get(name) != null`.
+   */
+  ;
+
+  _proto.has = function has(name) {
+    return this.current.hasOwnProperty(name) || this.builtins.hasOwnProperty(name);
+  }
+  /**
+   * Get the current value of a name, or `undefined` if there is no value.
+   *
+   * Note: Do not use `if (namespace.get(...))` to detect whether a macro
+   * is defined, as the definition may be the empty string which evaluates
+   * to `false` in JavaScript.  Use `if (namespace.get(...) != null)` or
+   * `if (namespace.has(...))`.
+   */
+  ;
+
+  _proto.get = function get(name) {
+    if (this.current.hasOwnProperty(name)) {
+      return this.current[name];
+    } else {
+      return this.builtins[name];
+    }
+  }
+  /**
+   * Set the current value of a name, and optionally set it globally too.
+   * Local set() sets the current value and (when appropriate) adds an undo
+   * operation to the undo stack.  Global set() may change the undo
+   * operation at every level, so takes time linear in their number.
+   * A value of undefined means to delete existing definitions.
+   */
+  ;
+
+  _proto.set = function set(name, value, global) {
+    if (global === void 0) {
+      global = false;
+    }
+
+    if (global) {
+      // Global set is equivalent to setting in all groups.  Simulate this
+      // by destroying any undos currently scheduled for this name,
+      // and adding an undo with the *new* value (in case it later gets
+      // locally reset within this environment).
+      for (var i = 0; i < this.undefStack.length; i++) {
+        delete this.undefStack[i][name];
+      }
+
+      if (this.undefStack.length > 0) {
+        this.undefStack[this.undefStack.length - 1][name] = value;
+      }
+    } else {
+      // Undo this set at end of this group (possibly to `undefined`),
+      // unless an undo is already in place, in which case that older
+      // value is the correct one.
+      var top = this.undefStack[this.undefStack.length - 1];
+
+      if (top && !top.hasOwnProperty(name)) {
+        top[name] = this.current[name];
+      }
+    }
+
+    if (value == null) {
+      delete this.current[name];
+    } else {
+      this.current[name] = value;
+    }
+  };
+
+  return Namespace;
+}();
+
+
+;// CONCATENATED MODULE: ./src/macros.js
+/**
+ * Predefined macros for KaTeX.
+ * This can be used to define some commands in terms of others.
+ */
+// Export global macros object from defineMacro
+
+var macros = _macros;
+/* harmony default export */ var src_macros = (macros);
+
+
+
+
+
+ //////////////////////////////////////////////////////////////////////
+// macro tools
+
+defineMacro("\\noexpand", function (context) {
+  // The expansion is the token itself; but that token is interpreted
+  // as if its meaning were ‘\relax’ if it is a control sequence that
+  // would ordinarily be expanded by TeX’s expansion rules.
+  var t = context.popToken();
+
+  if (context.isExpandable(t.text)) {
+    t.noexpand = true;
+    t.treatAsRelax = true;
+  }
+
+  return {
+    tokens: [t],
+    numArgs: 0
+  };
+});
+defineMacro("\\expandafter", function (context) {
+  // TeX first reads the token that comes immediately after \expandafter,
+  // without expanding it; let’s call this token t. Then TeX reads the
+  // token that comes after t (and possibly more tokens, if that token
+  // has an argument), replacing it by its expansion. Finally TeX puts
+  // t back in front of that expansion.
+  var t = context.popToken();
+  context.expandOnce(true); // expand only an expandable token
+
+  return {
+    tokens: [t],
+    numArgs: 0
+  };
+}); // LaTeX's \@firstoftwo{#1}{#2} expands to #1, skipping #2
+// TeX source: \long\def\@firstoftwo#1#2{#1}
+
+defineMacro("\\@firstoftwo", function (context) {
+  var args = context.consumeArgs(2);
+  return {
+    tokens: args[0],
+    numArgs: 0
+  };
+}); // LaTeX's \@secondoftwo{#1}{#2} expands to #2, skipping #1
+// TeX source: \long\def\@secondoftwo#1#2{#2}
+
+defineMacro("\\@secondoftwo", function (context) {
+  var args = context.consumeArgs(2);
+  return {
+    tokens: args[1],
+    numArgs: 0
+  };
+}); // LaTeX's \@ifnextchar{#1}{#2}{#3} looks ahead to the next (unexpanded)
+// symbol that isn't a space, consuming any spaces but not consuming the
+// first nonspace character.  If that nonspace character matches #1, then
+// the macro expands to #2; otherwise, it expands to #3.
+
+defineMacro("\\@ifnextchar", function (context) {
+  var args = context.consumeArgs(3); // symbol, if, else
+
+  context.consumeSpaces();
+  var nextToken = context.future();
+
+  if (args[0].length === 1 && args[0][0].text === nextToken.text) {
+    return {
+      tokens: args[1],
+      numArgs: 0
+    };
+  } else {
+    return {
+      tokens: args[2],
+      numArgs: 0
+    };
+  }
+}); // LaTeX's \@ifstar{#1}{#2} looks ahead to the next (unexpanded) symbol.
+// If it is `*`, then it consumes the symbol, and the macro expands to #1;
+// otherwise, the macro expands to #2 (without consuming the symbol).
+// TeX source: \def\@ifstar#1{\@ifnextchar *{\@firstoftwo{#1}}}
+
+defineMacro("\\@ifstar", "\\@ifnextchar *{\\@firstoftwo{#1}}"); // LaTeX's \TextOrMath{#1}{#2} expands to #1 in text mode, #2 in math mode
+
+defineMacro("\\TextOrMath", function (context) {
+  var args = context.consumeArgs(2);
+
+  if (context.mode === 'text') {
+    return {
+      tokens: args[0],
+      numArgs: 0
+    };
+  } else {
+    return {
+      tokens: args[1],
+      numArgs: 0
+    };
+  }
+}); // Lookup table for parsing numbers in base 8 through 16
+
+var digitToNumber = {
+  "0": 0,
+  "1": 1,
+  "2": 2,
+  "3": 3,
+  "4": 4,
+  "5": 5,
+  "6": 6,
+  "7": 7,
+  "8": 8,
+  "9": 9,
+  "a": 10,
+  "A": 10,
+  "b": 11,
+  "B": 11,
+  "c": 12,
+  "C": 12,
+  "d": 13,
+  "D": 13,
+  "e": 14,
+  "E": 14,
+  "f": 15,
+  "F": 15
+}; // TeX \char makes a literal character (catcode 12) using the following forms:
+// (see The TeXBook, p. 43)
+//   \char123  -- decimal
+//   \char'123 -- octal
+//   \char"123 -- hex
+//   \char`x   -- character that can be written (i.e. isn't active)
+//   \char`\x  -- character that cannot be written (e.g. %)
+// These all refer to characters from the font, so we turn them into special
+// calls to a function \@char dealt with in the Parser.
+
+defineMacro("\\char", function (context) {
+  var token = context.popToken();
+  var base;
+  var number = '';
+
+  if (token.text === "'") {
+    base = 8;
+    token = context.popToken();
+  } else if (token.text === '"') {
+    base = 16;
+    token = context.popToken();
+  } else if (token.text === "`") {
+    token = context.popToken();
+
+    if (token.text[0] === "\\") {
+      number = token.text.charCodeAt(1);
+    } else if (token.text === "EOF") {
+      throw new src_ParseError("\\char` missing argument");
+    } else {
+      number = token.text.charCodeAt(0);
+    }
+  } else {
+    base = 10;
+  }
+
+  if (base) {
+    // Parse a number in the given base, starting with first `token`.
+    number = digitToNumber[token.text];
+
+    if (number == null || number >= base) {
+      throw new src_ParseError("Invalid base-" + base + " digit " + token.text);
+    }
+
+    var digit;
+
+    while ((digit = digitToNumber[context.future().text]) != null && digit < base) {
+      number *= base;
+      number += digit;
+      context.popToken();
+    }
+  }
+
+  return "\\@char{" + number + "}";
+}); // \newcommand{\macro}[args]{definition}
+// \renewcommand{\macro}[args]{definition}
+// TODO: Optional arguments: \newcommand{\macro}[args][default]{definition}
+
+var newcommand = function newcommand(context, existsOK, nonexistsOK) {
+  var arg = context.consumeArg().tokens;
+
+  if (arg.length !== 1) {
+    throw new src_ParseError("\\newcommand's first argument must be a macro name");
+  }
+
+  var name = arg[0].text;
+  var exists = context.isDefined(name);
+
+  if (exists && !existsOK) {
+    throw new src_ParseError("\\newcommand{" + name + "} attempting to redefine " + (name + "; use \\renewcommand"));
+  }
+
+  if (!exists && !nonexistsOK) {
+    throw new src_ParseError("\\renewcommand{" + name + "} when command " + name + " " + "does not yet exist; use \\newcommand");
+  }
+
+  var numArgs = 0;
+  arg = context.consumeArg().tokens;
+
+  if (arg.length === 1 && arg[0].text === "[") {
+    var argText = '';
+    var token = context.expandNextToken();
+
+    while (token.text !== "]" && token.text !== "EOF") {
+      // TODO: Should properly expand arg, e.g., ignore {}s
+      argText += token.text;
+      token = context.expandNextToken();
+    }
+
+    if (!argText.match(/^\s*[0-9]+\s*$/)) {
+      throw new src_ParseError("Invalid number of arguments: " + argText);
+    }
+
+    numArgs = parseInt(argText);
+    arg = context.consumeArg().tokens;
+  } // Final arg is the expansion of the macro
+
+
+  context.macros.set(name, {
+    tokens: arg,
+    numArgs: numArgs
+  });
+  return '';
+};
+
+defineMacro("\\newcommand", function (context) {
+  return newcommand(context, false, true);
+});
+defineMacro("\\renewcommand", function (context) {
+  return newcommand(context, true, false);
+});
+defineMacro("\\providecommand", function (context) {
+  return newcommand(context, true, true);
+}); // terminal (console) tools
+
+defineMacro("\\message", function (context) {
+  var arg = context.consumeArgs(1)[0]; // eslint-disable-next-line no-console
+
+  console.log(arg.reverse().map(function (token) {
+    return token.text;
+  }).join(""));
+  return '';
+});
+defineMacro("\\errmessage", function (context) {
+  var arg = context.consumeArgs(1)[0]; // eslint-disable-next-line no-console
+
+  console.error(arg.reverse().map(function (token) {
+    return token.text;
+  }).join(""));
+  return '';
+});
+defineMacro("\\show", function (context) {
+  var tok = context.popToken();
+  var name = tok.text; // eslint-disable-next-line no-console
+
+  console.log(tok, context.macros.get(name), src_functions[name], src_symbols.math[name], src_symbols.text[name]);
+  return '';
+}); //////////////////////////////////////////////////////////////////////
+// Grouping
+// \let\bgroup={ \let\egroup=}
+
+defineMacro("\\bgroup", "{");
+defineMacro("\\egroup", "}"); // Symbols from latex.ltx:
+// \def~{\nobreakspace{}}
+// \def\lq{`}
+// \def\rq{'}
+// \def \aa {\r a}
+// \def \AA {\r A}
+
+defineMacro("~", "\\nobreakspace");
+defineMacro("\\lq", "`");
+defineMacro("\\rq", "'");
+defineMacro("\\aa", "\\r a");
+defineMacro("\\AA", "\\r A"); // Copyright (C) and registered (R) symbols. Use raw symbol in MathML.
+// \DeclareTextCommandDefault{\textcopyright}{\textcircled{c}}
+// \DeclareTextCommandDefault{\textregistered}{\textcircled{%
+//      \check@mathfonts\fontsize\sf@size\z@\math@fontsfalse\selectfont R}}
+// \DeclareRobustCommand{\copyright}{%
+//    \ifmmode{\nfss@text{\textcopyright}}\else\textcopyright\fi}
+
+defineMacro("\\textcopyright", "\\html@mathml{\\textcircled{c}}{\\char`©}");
+defineMacro("\\copyright", "\\TextOrMath{\\textcopyright}{\\text{\\textcopyright}}");
+defineMacro("\\textregistered", "\\html@mathml{\\textcircled{\\scriptsize R}}{\\char`®}"); // Characters omitted from Unicode range 1D400–1D7FF
+
+defineMacro("\u212C", "\\mathscr{B}"); // script
+
+defineMacro("\u2130", "\\mathscr{E}");
+defineMacro("\u2131", "\\mathscr{F}");
+defineMacro("\u210B", "\\mathscr{H}");
+defineMacro("\u2110", "\\mathscr{I}");
+defineMacro("\u2112", "\\mathscr{L}");
+defineMacro("\u2133", "\\mathscr{M}");
+defineMacro("\u211B", "\\mathscr{R}");
+defineMacro("\u212D", "\\mathfrak{C}"); // Fraktur
+
+defineMacro("\u210C", "\\mathfrak{H}");
+defineMacro("\u2128", "\\mathfrak{Z}"); // Define \Bbbk with a macro that works in both HTML and MathML.
+
+defineMacro("\\Bbbk", "\\Bbb{k}"); // Unicode middle dot
+// The KaTeX fonts do not contain U+00B7. Instead, \cdotp displays
+// the dot at U+22C5 and gives it punct spacing.
+
+defineMacro("\xB7", "\\cdotp"); // \llap and \rlap render their contents in text mode
+
+defineMacro("\\llap", "\\mathllap{\\textrm{#1}}");
+defineMacro("\\rlap", "\\mathrlap{\\textrm{#1}}");
+defineMacro("\\clap", "\\mathclap{\\textrm{#1}}"); // \mathstrut from the TeXbook, p 360
+
+defineMacro("\\mathstrut", "\\vphantom{(}"); // \underbar from TeXbook p 353
+
+defineMacro("\\underbar", "\\underline{\\text{#1}}"); // \not is defined by base/fontmath.ltx via
+// \DeclareMathSymbol{\not}{\mathrel}{symbols}{"36}
+// It's thus treated like a \mathrel, but defined by a symbol that has zero
+// width but extends to the right.  We use \rlap to get that spacing.
+// For MathML we write U+0338 here. buildMathML.js will then do the overlay.
+
+defineMacro("\\not", '\\html@mathml{\\mathrel{\\mathrlap\\@not}}{\\char"338}'); // Negated symbols from base/fontmath.ltx:
+// \def\neq{\not=} \let\ne=\neq
+// \DeclareRobustCommand
+//   \notin{\mathrel{\m@th\mathpalette\c@ncel\in}}
+// \def\c@ncel#1#2{\m@th\ooalign{$\hfil#1\mkern1mu/\hfil$\crcr$#1#2$}}
+
+defineMacro("\\neq", "\\html@mathml{\\mathrel{\\not=}}{\\mathrel{\\char`≠}}");
+defineMacro("\\ne", "\\neq");
+defineMacro("\u2260", "\\neq");
+defineMacro("\\notin", "\\html@mathml{\\mathrel{{\\in}\\mathllap{/\\mskip1mu}}}" + "{\\mathrel{\\char`∉}}");
+defineMacro("\u2209", "\\notin"); // Unicode stacked relations
+
+defineMacro("\u2258", "\\html@mathml{" + "\\mathrel{=\\kern{-1em}\\raisebox{0.4em}{$\\scriptsize\\frown$}}" + "}{\\mathrel{\\char`\u2258}}");
+defineMacro("\u2259", "\\html@mathml{\\stackrel{\\tiny\\wedge}{=}}{\\mathrel{\\char`\u2258}}");
+defineMacro("\u225A", "\\html@mathml{\\stackrel{\\tiny\\vee}{=}}{\\mathrel{\\char`\u225A}}");
+defineMacro("\u225B", "\\html@mathml{\\stackrel{\\scriptsize\\star}{=}}" + "{\\mathrel{\\char`\u225B}}");
+defineMacro("\u225D", "\\html@mathml{\\stackrel{\\tiny\\mathrm{def}}{=}}" + "{\\mathrel{\\char`\u225D}}");
+defineMacro("\u225E", "\\html@mathml{\\stackrel{\\tiny\\mathrm{m}}{=}}" + "{\\mathrel{\\char`\u225E}}");
+defineMacro("\u225F", "\\html@mathml{\\stackrel{\\tiny?}{=}}{\\mathrel{\\char`\u225F}}"); // Misc Unicode
+
+defineMacro("\u27C2", "\\perp");
+defineMacro("\u203C", "\\mathclose{!\\mkern-0.8mu!}");
+defineMacro("\u220C", "\\notni");
+defineMacro("\u231C", "\\ulcorner");
+defineMacro("\u231D", "\\urcorner");
+defineMacro("\u231E", "\\llcorner");
+defineMacro("\u231F", "\\lrcorner");
+defineMacro("\xA9", "\\copyright");
+defineMacro("\xAE", "\\textregistered");
+defineMacro("\uFE0F", "\\textregistered"); // The KaTeX fonts have corners at codepoints that don't match Unicode.
+// For MathML purposes, use the Unicode code point.
+
+defineMacro("\\ulcorner", "\\html@mathml{\\@ulcorner}{\\mathop{\\char\"231c}}");
+defineMacro("\\urcorner", "\\html@mathml{\\@urcorner}{\\mathop{\\char\"231d}}");
+defineMacro("\\llcorner", "\\html@mathml{\\@llcorner}{\\mathop{\\char\"231e}}");
+defineMacro("\\lrcorner", "\\html@mathml{\\@lrcorner}{\\mathop{\\char\"231f}}"); //////////////////////////////////////////////////////////////////////
+// LaTeX_2ε
+// \vdots{\vbox{\baselineskip4\p@  \lineskiplimit\z@
+// \kern6\p@\hbox{.}\hbox{.}\hbox{.}}}
+// We'll call \varvdots, which gets a glyph from symbols.js.
+// The zero-width rule gets us an equivalent to the vertical 6pt kern.
+
+defineMacro("\\vdots", "\\mathord{\\varvdots\\rule{0pt}{15pt}}");
+defineMacro("\u22EE", "\\vdots"); //////////////////////////////////////////////////////////////////////
+// amsmath.sty
+// http://mirrors.concertpass.com/tex-archive/macros/latex/required/amsmath/amsmath.pdf
+// Italic Greek capital letters.  AMS defines these with \DeclareMathSymbol,
+// but they are equivalent to \mathit{\Letter}.
+
+defineMacro("\\varGamma", "\\mathit{\\Gamma}");
+defineMacro("\\varDelta", "\\mathit{\\Delta}");
+defineMacro("\\varTheta", "\\mathit{\\Theta}");
+defineMacro("\\varLambda", "\\mathit{\\Lambda}");
+defineMacro("\\varXi", "\\mathit{\\Xi}");
+defineMacro("\\varPi", "\\mathit{\\Pi}");
+defineMacro("\\varSigma", "\\mathit{\\Sigma}");
+defineMacro("\\varUpsilon", "\\mathit{\\Upsilon}");
+defineMacro("\\varPhi", "\\mathit{\\Phi}");
+defineMacro("\\varPsi", "\\mathit{\\Psi}");
+defineMacro("\\varOmega", "\\mathit{\\Omega}"); //\newcommand{\substack}[1]{\subarray{c}#1\endsubarray}
+
+defineMacro("\\substack", "\\begin{subarray}{c}#1\\end{subarray}"); // \renewcommand{\colon}{\nobreak\mskip2mu\mathpunct{}\nonscript
+// \mkern-\thinmuskip{:}\mskip6muplus1mu\relax}
+
+defineMacro("\\colon", "\\nobreak\\mskip2mu\\mathpunct{}" + "\\mathchoice{\\mkern-3mu}{\\mkern-3mu}{}{}{:}\\mskip6mu\\relax"); // \newcommand{\boxed}[1]{\fbox{\m@th$\displaystyle#1$}}
+
+defineMacro("\\boxed", "\\fbox{$\\displaystyle{#1}$}"); // \def\iff{\DOTSB\;\Longleftrightarrow\;}
+// \def\implies{\DOTSB\;\Longrightarrow\;}
+// \def\impliedby{\DOTSB\;\Longleftarrow\;}
+
+defineMacro("\\iff", "\\DOTSB\\;\\Longleftrightarrow\\;");
+defineMacro("\\implies", "\\DOTSB\\;\\Longrightarrow\\;");
+defineMacro("\\impliedby", "\\DOTSB\\;\\Longleftarrow\\;"); // AMSMath's automatic \dots, based on \mdots@@ macro.
+
+var dotsByToken = {
+  ',': '\\dotsc',
+  '\\not': '\\dotsb',
+  // \keybin@ checks for the following:
+  '+': '\\dotsb',
+  '=': '\\dotsb',
+  '<': '\\dotsb',
+  '>': '\\dotsb',
+  '-': '\\dotsb',
+  '*': '\\dotsb',
+  ':': '\\dotsb',
+  // Symbols whose definition starts with \DOTSB:
+  '\\DOTSB': '\\dotsb',
+  '\\coprod': '\\dotsb',
+  '\\bigvee': '\\dotsb',
+  '\\bigwedge': '\\dotsb',
+  '\\biguplus': '\\dotsb',
+  '\\bigcap': '\\dotsb',
+  '\\bigcup': '\\dotsb',
+  '\\prod': '\\dotsb',
+  '\\sum': '\\dotsb',
+  '\\bigotimes': '\\dotsb',
+  '\\bigoplus': '\\dotsb',
+  '\\bigodot': '\\dotsb',
+  '\\bigsqcup': '\\dotsb',
+  '\\And': '\\dotsb',
+  '\\longrightarrow': '\\dotsb',
+  '\\Longrightarrow': '\\dotsb',
+  '\\longleftarrow': '\\dotsb',
+  '\\Longleftarrow': '\\dotsb',
+  '\\longleftrightarrow': '\\dotsb',
+  '\\Longleftrightarrow': '\\dotsb',
+  '\\mapsto': '\\dotsb',
+  '\\longmapsto': '\\dotsb',
+  '\\hookrightarrow': '\\dotsb',
+  '\\doteq': '\\dotsb',
+  // Symbols whose definition starts with \mathbin:
+  '\\mathbin': '\\dotsb',
+  // Symbols whose definition starts with \mathrel:
+  '\\mathrel': '\\dotsb',
+  '\\relbar': '\\dotsb',
+  '\\Relbar': '\\dotsb',
+  '\\xrightarrow': '\\dotsb',
+  '\\xleftarrow': '\\dotsb',
+  // Symbols whose definition starts with \DOTSI:
+  '\\DOTSI': '\\dotsi',
+  '\\int': '\\dotsi',
+  '\\oint': '\\dotsi',
+  '\\iint': '\\dotsi',
+  '\\iiint': '\\dotsi',
+  '\\iiiint': '\\dotsi',
+  '\\idotsint': '\\dotsi',
+  // Symbols whose definition starts with \DOTSX:
+  '\\DOTSX': '\\dotsx'
+};
+defineMacro("\\dots", function (context) {
+  // TODO: If used in text mode, should expand to \textellipsis.
+  // However, in KaTeX, \textellipsis and \ldots behave the same
+  // (in text mode), and it's unlikely we'd see any of the math commands
+  // that affect the behavior of \dots when in text mode.  So fine for now
+  // (until we support \ifmmode ... \else ... \fi).
+  var thedots = '\\dotso';
+  var next = context.expandAfterFuture().text;
+
+  if (next in dotsByToken) {
+    thedots = dotsByToken[next];
+  } else if (next.slice(0, 4) === '\\not') {
+    thedots = '\\dotsb';
+  } else if (next in src_symbols.math) {
+    if (utils.contains(['bin', 'rel'], src_symbols.math[next].group)) {
+      thedots = '\\dotsb';
+    }
+  }
+
+  return thedots;
+});
+var spaceAfterDots = {
+  // \rightdelim@ checks for the following:
+  ')': true,
+  ']': true,
+  '\\rbrack': true,
+  '\\}': true,
+  '\\rbrace': true,
+  '\\rangle': true,
+  '\\rceil': true,
+  '\\rfloor': true,
+  '\\rgroup': true,
+  '\\rmoustache': true,
+  '\\right': true,
+  '\\bigr': true,
+  '\\biggr': true,
+  '\\Bigr': true,
+  '\\Biggr': true,
+  // \extra@ also tests for the following:
+  '$': true,
+  // \extrap@ checks for the following:
+  ';': true,
+  '.': true,
+  ',': true
+};
+defineMacro("\\dotso", function (context) {
+  var next = context.future().text;
+
+  if (next in spaceAfterDots) {
+    return "\\ldots\\,";
+  } else {
+    return "\\ldots";
+  }
+});
+defineMacro("\\dotsc", function (context) {
+  var next = context.future().text; // \dotsc uses \extra@ but not \extrap@, instead specially checking for
+  // ';' and '.', but doesn't check for ','.
+
+  if (next in spaceAfterDots && next !== ',') {
+    return "\\ldots\\,";
+  } else {
+    return "\\ldots";
+  }
+});
+defineMacro("\\cdots", function (context) {
+  var next = context.future().text;
+
+  if (next in spaceAfterDots) {
+    return "\\@cdots\\,";
+  } else {
+    return "\\@cdots";
+  }
+});
+defineMacro("\\dotsb", "\\cdots");
+defineMacro("\\dotsm", "\\cdots");
+defineMacro("\\dotsi", "\\!\\cdots"); // amsmath doesn't actually define \dotsx, but \dots followed by a macro
+// starting with \DOTSX implies \dotso, and then \extra@ detects this case
+// and forces the added `\,`.
+
+defineMacro("\\dotsx", "\\ldots\\,"); // \let\DOTSI\relax
+// \let\DOTSB\relax
+// \let\DOTSX\relax
+
+defineMacro("\\DOTSI", "\\relax");
+defineMacro("\\DOTSB", "\\relax");
+defineMacro("\\DOTSX", "\\relax"); // Spacing, based on amsmath.sty's override of LaTeX defaults
+// \DeclareRobustCommand{\tmspace}[3]{%
+//   \ifmmode\mskip#1#2\else\kern#1#3\fi\relax}
+
+defineMacro("\\tmspace", "\\TextOrMath{\\kern#1#3}{\\mskip#1#2}\\relax"); // \renewcommand{\,}{\tmspace+\thinmuskip{.1667em}}
+// TODO: math mode should use \thinmuskip
+
+defineMacro("\\,", "\\tmspace+{3mu}{.1667em}"); // \let\thinspace\,
+
+defineMacro("\\thinspace", "\\,"); // \def\>{\mskip\medmuskip}
+// \renewcommand{\:}{\tmspace+\medmuskip{.2222em}}
+// TODO: \> and math mode of \: should use \medmuskip = 4mu plus 2mu minus 4mu
+
+defineMacro("\\>", "\\mskip{4mu}");
+defineMacro("\\:", "\\tmspace+{4mu}{.2222em}"); // \let\medspace\:
+
+defineMacro("\\medspace", "\\:"); // \renewcommand{\;}{\tmspace+\thickmuskip{.2777em}}
+// TODO: math mode should use \thickmuskip = 5mu plus 5mu
+
+defineMacro("\\;", "\\tmspace+{5mu}{.2777em}"); // \let\thickspace\;
+
+defineMacro("\\thickspace", "\\;"); // \renewcommand{\!}{\tmspace-\thinmuskip{.1667em}}
+// TODO: math mode should use \thinmuskip
+
+defineMacro("\\!", "\\tmspace-{3mu}{.1667em}"); // \let\negthinspace\!
+
+defineMacro("\\negthinspace", "\\!"); // \newcommand{\negmedspace}{\tmspace-\medmuskip{.2222em}}
+// TODO: math mode should use \medmuskip
+
+defineMacro("\\negmedspace", "\\tmspace-{4mu}{.2222em}"); // \newcommand{\negthickspace}{\tmspace-\thickmuskip{.2777em}}
+// TODO: math mode should use \thickmuskip
+
+defineMacro("\\negthickspace", "\\tmspace-{5mu}{.277em}"); // \def\enspace{\kern.5em }
+
+defineMacro("\\enspace", "\\kern.5em "); // \def\enskip{\hskip.5em\relax}
+
+defineMacro("\\enskip", "\\hskip.5em\\relax"); // \def\quad{\hskip1em\relax}
+
+defineMacro("\\quad", "\\hskip1em\\relax"); // \def\qquad{\hskip2em\relax}
+
+defineMacro("\\qquad", "\\hskip2em\\relax"); // \tag@in@display form of \tag
+
+defineMacro("\\tag", "\\@ifstar\\tag@literal\\tag@paren");
+defineMacro("\\tag@paren", "\\tag@literal{({#1})}");
+defineMacro("\\tag@literal", function (context) {
+  if (context.macros.get("\\df@tag")) {
+    throw new src_ParseError("Multiple \\tag");
+  }
+
+  return "\\gdef\\df@tag{\\text{#1}}";
+}); // \renewcommand{\bmod}{\nonscript\mskip-\medmuskip\mkern5mu\mathbin
+//   {\operator@font mod}\penalty900
+//   \mkern5mu\nonscript\mskip-\medmuskip}
+// \newcommand{\pod}[1]{\allowbreak
+//   \if@display\mkern18mu\else\mkern8mu\fi(#1)}
+// \renewcommand{\pmod}[1]{\pod{{\operator@font mod}\mkern6mu#1}}
+// \newcommand{\mod}[1]{\allowbreak\if@display\mkern18mu
+//   \else\mkern12mu\fi{\operator@font mod}\,\,#1}
+// TODO: math mode should use \medmuskip = 4mu plus 2mu minus 4mu
+
+defineMacro("\\bmod", "\\mathchoice{\\mskip1mu}{\\mskip1mu}{\\mskip5mu}{\\mskip5mu}" + "\\mathbin{\\rm mod}" + "\\mathchoice{\\mskip1mu}{\\mskip1mu}{\\mskip5mu}{\\mskip5mu}");
+defineMacro("\\pod", "\\allowbreak" + "\\mathchoice{\\mkern18mu}{\\mkern8mu}{\\mkern8mu}{\\mkern8mu}(#1)");
+defineMacro("\\pmod", "\\pod{{\\rm mod}\\mkern6mu#1}");
+defineMacro("\\mod", "\\allowbreak" + "\\mathchoice{\\mkern18mu}{\\mkern12mu}{\\mkern12mu}{\\mkern12mu}" + "{\\rm mod}\\,\\,#1"); //////////////////////////////////////////////////////////////////////
+// LaTeX source2e
+// \expandafter\let\expandafter\@normalcr
+//     \csname\expandafter\@gobble\string\\ \endcsname
+// \DeclareRobustCommand\newline{\@normalcr\relax}
+
+defineMacro("\\newline", "\\\\\\relax"); // \def\TeX{T\kern-.1667em\lower.5ex\hbox{E}\kern-.125emX\@}
+// TODO: Doesn't normally work in math mode because \@ fails.  KaTeX doesn't
+// support \@ yet, so that's omitted, and we add \text so that the result
+// doesn't look funny in math mode.
+
+defineMacro("\\TeX", "\\textrm{\\html@mathml{" + "T\\kern-.1667em\\raisebox{-.5ex}{E}\\kern-.125emX" + "}{TeX}}"); // \DeclareRobustCommand{\LaTeX}{L\kern-.36em%
+//         {\sbox\z@ T%
+//          \vbox to\ht\z@{\hbox{\check@mathfonts
+//                               \fontsize\sf@size\z@
+//                               \math@fontsfalse\selectfont
+//                               A}%
+//                         \vss}%
+//         }%
+//         \kern-.15em%
+//         \TeX}
+// This code aligns the top of the A with the T (from the perspective of TeX's
+// boxes, though visually the A appears to extend above slightly).
+// We compute the corresponding \raisebox when A is rendered in \normalsize
+// \scriptstyle, which has a scale factor of 0.7 (see Options.js).
+
+var latexRaiseA = makeEm(fontMetricsData["Main-Regular"]["T".charCodeAt(0)][1] - 0.7 * fontMetricsData["Main-Regular"]["A".charCodeAt(0)][1]);
+defineMacro("\\LaTeX", "\\textrm{\\html@mathml{" + ("L\\kern-.36em\\raisebox{" + latexRaiseA + "}{\\scriptstyle A}") + "\\kern-.15em\\TeX}{LaTeX}}"); // New KaTeX logo based on tweaking LaTeX logo
+
+defineMacro("\\KaTeX", "\\textrm{\\html@mathml{" + ("K\\kern-.17em\\raisebox{" + latexRaiseA + "}{\\scriptstyle A}") + "\\kern-.15em\\TeX}{KaTeX}}"); // \DeclareRobustCommand\hspace{\@ifstar\@hspacer\@hspace}
+// \def\@hspace#1{\hskip  #1\relax}
+// \def\@hspacer#1{\vrule \@width\z@\nobreak
+//                 \hskip #1\hskip \z@skip}
+
+defineMacro("\\hspace", "\\@ifstar\\@hspacer\\@hspace");
+defineMacro("\\@hspace", "\\hskip #1\\relax");
+defineMacro("\\@hspacer", "\\rule{0pt}{0pt}\\hskip #1\\relax"); //////////////////////////////////////////////////////////////////////
+// mathtools.sty
+//\providecommand\ordinarycolon{:}
+
+defineMacro("\\ordinarycolon", ":"); //\def\vcentcolon{\mathrel{\mathop\ordinarycolon}}
+//TODO(edemaine): Not yet centered. Fix via \raisebox or #726
+
+defineMacro("\\vcentcolon", "\\mathrel{\\mathop\\ordinarycolon}"); // \providecommand*\dblcolon{\vcentcolon\mathrel{\mkern-.9mu}\vcentcolon}
+
+defineMacro("\\dblcolon", "\\html@mathml{" + "\\mathrel{\\vcentcolon\\mathrel{\\mkern-.9mu}\\vcentcolon}}" + "{\\mathop{\\char\"2237}}"); // \providecommand*\coloneqq{\vcentcolon\mathrel{\mkern-1.2mu}=}
+
+defineMacro("\\coloneqq", "\\html@mathml{" + "\\mathrel{\\vcentcolon\\mathrel{\\mkern-1.2mu}=}}" + "{\\mathop{\\char\"2254}}"); // ≔
+// \providecommand*\Coloneqq{\dblcolon\mathrel{\mkern-1.2mu}=}
+
+defineMacro("\\Coloneqq", "\\html@mathml{" + "\\mathrel{\\dblcolon\\mathrel{\\mkern-1.2mu}=}}" + "{\\mathop{\\char\"2237\\char\"3d}}"); // \providecommand*\coloneq{\vcentcolon\mathrel{\mkern-1.2mu}\mathrel{-}}
+
+defineMacro("\\coloneq", "\\html@mathml{" + "\\mathrel{\\vcentcolon\\mathrel{\\mkern-1.2mu}\\mathrel{-}}}" + "{\\mathop{\\char\"3a\\char\"2212}}"); // \providecommand*\Coloneq{\dblcolon\mathrel{\mkern-1.2mu}\mathrel{-}}
+
+defineMacro("\\Coloneq", "\\html@mathml{" + "\\mathrel{\\dblcolon\\mathrel{\\mkern-1.2mu}\\mathrel{-}}}" + "{\\mathop{\\char\"2237\\char\"2212}}"); // \providecommand*\eqqcolon{=\mathrel{\mkern-1.2mu}\vcentcolon}
+
+defineMacro("\\eqqcolon", "\\html@mathml{" + "\\mathrel{=\\mathrel{\\mkern-1.2mu}\\vcentcolon}}" + "{\\mathop{\\char\"2255}}"); // ≕
+// \providecommand*\Eqqcolon{=\mathrel{\mkern-1.2mu}\dblcolon}
+
+defineMacro("\\Eqqcolon", "\\html@mathml{" + "\\mathrel{=\\mathrel{\\mkern-1.2mu}\\dblcolon}}" + "{\\mathop{\\char\"3d\\char\"2237}}"); // \providecommand*\eqcolon{\mathrel{-}\mathrel{\mkern-1.2mu}\vcentcolon}
+
+defineMacro("\\eqcolon", "\\html@mathml{" + "\\mathrel{\\mathrel{-}\\mathrel{\\mkern-1.2mu}\\vcentcolon}}" + "{\\mathop{\\char\"2239}}"); // \providecommand*\Eqcolon{\mathrel{-}\mathrel{\mkern-1.2mu}\dblcolon}
+
+defineMacro("\\Eqcolon", "\\html@mathml{" + "\\mathrel{\\mathrel{-}\\mathrel{\\mkern-1.2mu}\\dblcolon}}" + "{\\mathop{\\char\"2212\\char\"2237}}"); // \providecommand*\colonapprox{\vcentcolon\mathrel{\mkern-1.2mu}\approx}
+
+defineMacro("\\colonapprox", "\\html@mathml{" + "\\mathrel{\\vcentcolon\\mathrel{\\mkern-1.2mu}\\approx}}" + "{\\mathop{\\char\"3a\\char\"2248}}"); // \providecommand*\Colonapprox{\dblcolon\mathrel{\mkern-1.2mu}\approx}
+
+defineMacro("\\Colonapprox", "\\html@mathml{" + "\\mathrel{\\dblcolon\\mathrel{\\mkern-1.2mu}\\approx}}" + "{\\mathop{\\char\"2237\\char\"2248}}"); // \providecommand*\colonsim{\vcentcolon\mathrel{\mkern-1.2mu}\sim}
+
+defineMacro("\\colonsim", "\\html@mathml{" + "\\mathrel{\\vcentcolon\\mathrel{\\mkern-1.2mu}\\sim}}" + "{\\mathop{\\char\"3a\\char\"223c}}"); // \providecommand*\Colonsim{\dblcolon\mathrel{\mkern-1.2mu}\sim}
+
+defineMacro("\\Colonsim", "\\html@mathml{" + "\\mathrel{\\dblcolon\\mathrel{\\mkern-1.2mu}\\sim}}" + "{\\mathop{\\char\"2237\\char\"223c}}"); // Some Unicode characters are implemented with macros to mathtools functions.
+
+defineMacro("\u2237", "\\dblcolon"); // ::
+
+defineMacro("\u2239", "\\eqcolon"); // -:
+
+defineMacro("\u2254", "\\coloneqq"); // :=
+
+defineMacro("\u2255", "\\eqqcolon"); // =:
+
+defineMacro("\u2A74", "\\Coloneqq"); // ::=
+//////////////////////////////////////////////////////////////////////
+// colonequals.sty
+// Alternate names for mathtools's macros:
+
+defineMacro("\\ratio", "\\vcentcolon");
+defineMacro("\\coloncolon", "\\dblcolon");
+defineMacro("\\colonequals", "\\coloneqq");
+defineMacro("\\coloncolonequals", "\\Coloneqq");
+defineMacro("\\equalscolon", "\\eqqcolon");
+defineMacro("\\equalscoloncolon", "\\Eqqcolon");
+defineMacro("\\colonminus", "\\coloneq");
+defineMacro("\\coloncolonminus", "\\Coloneq");
+defineMacro("\\minuscolon", "\\eqcolon");
+defineMacro("\\minuscoloncolon", "\\Eqcolon"); // \colonapprox name is same in mathtools and colonequals.
+
+defineMacro("\\coloncolonapprox", "\\Colonapprox"); // \colonsim name is same in mathtools and colonequals.
+
+defineMacro("\\coloncolonsim", "\\Colonsim"); // Additional macros, implemented by analogy with mathtools definitions:
+
+defineMacro("\\simcolon", "\\mathrel{\\sim\\mathrel{\\mkern-1.2mu}\\vcentcolon}");
+defineMacro("\\simcoloncolon", "\\mathrel{\\sim\\mathrel{\\mkern-1.2mu}\\dblcolon}");
+defineMacro("\\approxcolon", "\\mathrel{\\approx\\mathrel{\\mkern-1.2mu}\\vcentcolon}");
+defineMacro("\\approxcoloncolon", "\\mathrel{\\approx\\mathrel{\\mkern-1.2mu}\\dblcolon}"); // Present in newtxmath, pxfonts and txfonts
+
+defineMacro("\\notni", "\\html@mathml{\\not\\ni}{\\mathrel{\\char`\u220C}}");
+defineMacro("\\limsup", "\\DOTSB\\operatorname*{lim\\,sup}");
+defineMacro("\\liminf", "\\DOTSB\\operatorname*{lim\\,inf}"); //////////////////////////////////////////////////////////////////////
+// From amsopn.sty
+
+defineMacro("\\injlim", "\\DOTSB\\operatorname*{inj\\,lim}");
+defineMacro("\\projlim", "\\DOTSB\\operatorname*{proj\\,lim}");
+defineMacro("\\varlimsup", "\\DOTSB\\operatorname*{\\overline{lim}}");
+defineMacro("\\varliminf", "\\DOTSB\\operatorname*{\\underline{lim}}");
+defineMacro("\\varinjlim", "\\DOTSB\\operatorname*{\\underrightarrow{lim}}");
+defineMacro("\\varprojlim", "\\DOTSB\\operatorname*{\\underleftarrow{lim}}"); //////////////////////////////////////////////////////////////////////
+// MathML alternates for KaTeX glyphs in the Unicode private area
+
+defineMacro("\\gvertneqq", "\\html@mathml{\\@gvertneqq}{\u2269}");
+defineMacro("\\lvertneqq", "\\html@mathml{\\@lvertneqq}{\u2268}");
+defineMacro("\\ngeqq", "\\html@mathml{\\@ngeqq}{\u2271}");
+defineMacro("\\ngeqslant", "\\html@mathml{\\@ngeqslant}{\u2271}");
+defineMacro("\\nleqq", "\\html@mathml{\\@nleqq}{\u2270}");
+defineMacro("\\nleqslant", "\\html@mathml{\\@nleqslant}{\u2270}");
+defineMacro("\\nshortmid", "\\html@mathml{\\@nshortmid}{∤}");
+defineMacro("\\nshortparallel", "\\html@mathml{\\@nshortparallel}{∦}");
+defineMacro("\\nsubseteqq", "\\html@mathml{\\@nsubseteqq}{\u2288}");
+defineMacro("\\nsupseteqq", "\\html@mathml{\\@nsupseteqq}{\u2289}");
+defineMacro("\\varsubsetneq", "\\html@mathml{\\@varsubsetneq}{⊊}");
+defineMacro("\\varsubsetneqq", "\\html@mathml{\\@varsubsetneqq}{⫋}");
+defineMacro("\\varsupsetneq", "\\html@mathml{\\@varsupsetneq}{⊋}");
+defineMacro("\\varsupsetneqq", "\\html@mathml{\\@varsupsetneqq}{⫌}");
+defineMacro("\\imath", "\\html@mathml{\\@imath}{\u0131}");
+defineMacro("\\jmath", "\\html@mathml{\\@jmath}{\u0237}"); //////////////////////////////////////////////////////////////////////
+// stmaryrd and semantic
+// The stmaryrd and semantic packages render the next four items by calling a
+// glyph. Those glyphs do not exist in the KaTeX fonts. Hence the macros.
+
+defineMacro("\\llbracket", "\\html@mathml{" + "\\mathopen{[\\mkern-3.2mu[}}" + "{\\mathopen{\\char`\u27E6}}");
+defineMacro("\\rrbracket", "\\html@mathml{" + "\\mathclose{]\\mkern-3.2mu]}}" + "{\\mathclose{\\char`\u27E7}}");
+defineMacro("\u27E6", "\\llbracket"); // blackboard bold [
+
+defineMacro("\u27E7", "\\rrbracket"); // blackboard bold ]
+
+defineMacro("\\lBrace", "\\html@mathml{" + "\\mathopen{\\{\\mkern-3.2mu[}}" + "{\\mathopen{\\char`\u2983}}");
+defineMacro("\\rBrace", "\\html@mathml{" + "\\mathclose{]\\mkern-3.2mu\\}}}" + "{\\mathclose{\\char`\u2984}}");
+defineMacro("\u2983", "\\lBrace"); // blackboard bold {
+
+defineMacro("\u2984", "\\rBrace"); // blackboard bold }
+// TODO: Create variable sized versions of the last two items. I believe that
+// will require new font glyphs.
+// The stmaryrd function `\minuso` provides a "Plimsoll" symbol that
+// superimposes the characters \circ and \mathminus. Used in chemistry.
+
+defineMacro("\\minuso", "\\mathbin{\\html@mathml{" + "{\\mathrlap{\\mathchoice{\\kern{0.145em}}{\\kern{0.145em}}" + "{\\kern{0.1015em}}{\\kern{0.0725em}}\\circ}{-}}}" + "{\\char`⦵}}");
+defineMacro("⦵", "\\minuso"); //////////////////////////////////////////////////////////////////////
+// texvc.sty
+// The texvc package contains macros available in mediawiki pages.
+// We omit the functions deprecated at
+// https://en.wikipedia.org/wiki/Help:Displaying_a_formula#Deprecated_syntax
+// We also omit texvc's \O, which conflicts with \text{\O}
+
+defineMacro("\\darr", "\\downarrow");
+defineMacro("\\dArr", "\\Downarrow");
+defineMacro("\\Darr", "\\Downarrow");
+defineMacro("\\lang", "\\langle");
+defineMacro("\\rang", "\\rangle");
+defineMacro("\\uarr", "\\uparrow");
+defineMacro("\\uArr", "\\Uparrow");
+defineMacro("\\Uarr", "\\Uparrow");
+defineMacro("\\N", "\\mathbb{N}");
+defineMacro("\\R", "\\mathbb{R}");
+defineMacro("\\Z", "\\mathbb{Z}");
+defineMacro("\\alef", "\\aleph");
+defineMacro("\\alefsym", "\\aleph");
+defineMacro("\\Alpha", "\\mathrm{A}");
+defineMacro("\\Beta", "\\mathrm{B}");
+defineMacro("\\bull", "\\bullet");
+defineMacro("\\Chi", "\\mathrm{X}");
+defineMacro("\\clubs", "\\clubsuit");
+defineMacro("\\cnums", "\\mathbb{C}");
+defineMacro("\\Complex", "\\mathbb{C}");
+defineMacro("\\Dagger", "\\ddagger");
+defineMacro("\\diamonds", "\\diamondsuit");
+defineMacro("\\empty", "\\emptyset");
+defineMacro("\\Epsilon", "\\mathrm{E}");
+defineMacro("\\Eta", "\\mathrm{H}");
+defineMacro("\\exist", "\\exists");
+defineMacro("\\harr", "\\leftrightarrow");
+defineMacro("\\hArr", "\\Leftrightarrow");
+defineMacro("\\Harr", "\\Leftrightarrow");
+defineMacro("\\hearts", "\\heartsuit");
+defineMacro("\\image", "\\Im");
+defineMacro("\\infin", "\\infty");
+defineMacro("\\Iota", "\\mathrm{I}");
+defineMacro("\\isin", "\\in");
+defineMacro("\\Kappa", "\\mathrm{K}");
+defineMacro("\\larr", "\\leftarrow");
+defineMacro("\\lArr", "\\Leftarrow");
+defineMacro("\\Larr", "\\Leftarrow");
+defineMacro("\\lrarr", "\\leftrightarrow");
+defineMacro("\\lrArr", "\\Leftrightarrow");
+defineMacro("\\Lrarr", "\\Leftrightarrow");
+defineMacro("\\Mu", "\\mathrm{M}");
+defineMacro("\\natnums", "\\mathbb{N}");
+defineMacro("\\Nu", "\\mathrm{N}");
+defineMacro("\\Omicron", "\\mathrm{O}");
+defineMacro("\\plusmn", "\\pm");
+defineMacro("\\rarr", "\\rightarrow");
+defineMacro("\\rArr", "\\Rightarrow");
+defineMacro("\\Rarr", "\\Rightarrow");
+defineMacro("\\real", "\\Re");
+defineMacro("\\reals", "\\mathbb{R}");
+defineMacro("\\Reals", "\\mathbb{R}");
+defineMacro("\\Rho", "\\mathrm{P}");
+defineMacro("\\sdot", "\\cdot");
+defineMacro("\\sect", "\\S");
+defineMacro("\\spades", "\\spadesuit");
+defineMacro("\\sub", "\\subset");
+defineMacro("\\sube", "\\subseteq");
+defineMacro("\\supe", "\\supseteq");
+defineMacro("\\Tau", "\\mathrm{T}");
+defineMacro("\\thetasym", "\\vartheta"); // TODO: defineMacro("\\varcoppa", "\\\mbox{\\coppa}");
+
+defineMacro("\\weierp", "\\wp");
+defineMacro("\\Zeta", "\\mathrm{Z}"); //////////////////////////////////////////////////////////////////////
+// statmath.sty
+// https://ctan.math.illinois.edu/macros/latex/contrib/statmath/statmath.pdf
+
+defineMacro("\\argmin", "\\DOTSB\\operatorname*{arg\\,min}");
+defineMacro("\\argmax", "\\DOTSB\\operatorname*{arg\\,max}");
+defineMacro("\\plim", "\\DOTSB\\mathop{\\operatorname{plim}}\\limits"); //////////////////////////////////////////////////////////////////////
+// braket.sty
+// http://ctan.math.washington.edu/tex-archive/macros/latex/contrib/braket/braket.pdf
+
+defineMacro("\\bra", "\\mathinner{\\langle{#1}|}");
+defineMacro("\\ket", "\\mathinner{|{#1}\\rangle}");
+defineMacro("\\braket", "\\mathinner{\\langle{#1}\\rangle}");
+defineMacro("\\Bra", "\\left\\langle#1\\right|");
+defineMacro("\\Ket", "\\left|#1\\right\\rangle");
+
+var braketHelper = function braketHelper(one) {
+  return function (context) {
+    var left = context.consumeArg().tokens;
+    var middle = context.consumeArg().tokens;
+    var middleDouble = context.consumeArg().tokens;
+    var right = context.consumeArg().tokens;
+    var oldMiddle = context.macros.get("|");
+    var oldMiddleDouble = context.macros.get("\\|");
+    context.macros.beginGroup();
+
+    var midMacro = function midMacro(double) {
+      return function (context) {
+        if (one) {
+          // Only modify the first instance of | or \|
+          context.macros.set("|", oldMiddle);
+
+          if (middleDouble.length) {
+            context.macros.set("\\|", oldMiddleDouble);
+          }
+        }
+
+        var doubled = double;
+
+        if (!double && middleDouble.length) {
+          // Mimic \@ifnextchar
+          var nextToken = context.future();
+
+          if (nextToken.text === "|") {
+            context.popToken();
+            doubled = true;
+          }
+        }
+
+        return {
+          tokens: doubled ? middleDouble : middle,
+          numArgs: 0
+        };
+      };
+    };
+
+    context.macros.set("|", midMacro(false));
+
+    if (middleDouble.length) {
+      context.macros.set("\\|", midMacro(true));
+    }
+
+    var arg = context.consumeArg().tokens;
+    var expanded = context.expandTokens([].concat(right, arg, left));
+    context.macros.endGroup();
+    return {
+      tokens: expanded.reverse(),
+      numArgs: 0
+    };
+  };
+};
+
+defineMacro("\\bra@ket", braketHelper(false));
+defineMacro("\\bra@set", braketHelper(true));
+defineMacro("\\Braket", "\\bra@ket{\\left\\langle}" + "{\\,\\middle\\vert\\,}{\\,\\middle\\vert\\,}{\\right\\rangle}");
+defineMacro("\\Set", "\\bra@set{\\left\\{\\:}" + "{\\;\\middle\\vert\\;}{\\;\\middle\\Vert\\;}{\\:\\right\\}}");
+defineMacro("\\set", "\\bra@set{\\{\\,}{\\mid}{}{\\,\\}}"); // has no support for special || or \|
+//////////////////////////////////////////////////////////////////////
+// actuarialangle.dtx
+
+defineMacro("\\angln", "{\\angl n}"); // Custom Khan Academy colors, should be moved to an optional package
+
+defineMacro("\\blue", "\\textcolor{##6495ed}{#1}");
+defineMacro("\\orange", "\\textcolor{##ffa500}{#1}");
+defineMacro("\\pink", "\\textcolor{##ff00af}{#1}");
+defineMacro("\\red", "\\textcolor{##df0030}{#1}");
+defineMacro("\\green", "\\textcolor{##28ae7b}{#1}");
+defineMacro("\\gray", "\\textcolor{gray}{#1}");
+defineMacro("\\purple", "\\textcolor{##9d38bd}{#1}");
+defineMacro("\\blueA", "\\textcolor{##ccfaff}{#1}");
+defineMacro("\\blueB", "\\textcolor{##80f6ff}{#1}");
+defineMacro("\\blueC", "\\textcolor{##63d9ea}{#1}");
+defineMacro("\\blueD", "\\textcolor{##11accd}{#1}");
+defineMacro("\\blueE", "\\textcolor{##0c7f99}{#1}");
+defineMacro("\\tealA", "\\textcolor{##94fff5}{#1}");
+defineMacro("\\tealB", "\\textcolor{##26edd5}{#1}");
+defineMacro("\\tealC", "\\textcolor{##01d1c1}{#1}");
+defineMacro("\\tealD", "\\textcolor{##01a995}{#1}");
+defineMacro("\\tealE", "\\textcolor{##208170}{#1}");
+defineMacro("\\greenA", "\\textcolor{##b6ffb0}{#1}");
+defineMacro("\\greenB", "\\textcolor{##8af281}{#1}");
+defineMacro("\\greenC", "\\textcolor{##74cf70}{#1}");
+defineMacro("\\greenD", "\\textcolor{##1fab54}{#1}");
+defineMacro("\\greenE", "\\textcolor{##0d923f}{#1}");
+defineMacro("\\goldA", "\\textcolor{##ffd0a9}{#1}");
+defineMacro("\\goldB", "\\textcolor{##ffbb71}{#1}");
+defineMacro("\\goldC", "\\textcolor{##ff9c39}{#1}");
+defineMacro("\\goldD", "\\textcolor{##e07d10}{#1}");
+defineMacro("\\goldE", "\\textcolor{##a75a05}{#1}");
+defineMacro("\\redA", "\\textcolor{##fca9a9}{#1}");
+defineMacro("\\redB", "\\textcolor{##ff8482}{#1}");
+defineMacro("\\redC", "\\textcolor{##f9685d}{#1}");
+defineMacro("\\redD", "\\textcolor{##e84d39}{#1}");
+defineMacro("\\redE", "\\textcolor{##bc2612}{#1}");
+defineMacro("\\maroonA", "\\textcolor{##ffbde0}{#1}");
+defineMacro("\\maroonB", "\\textcolor{##ff92c6}{#1}");
+defineMacro("\\maroonC", "\\textcolor{##ed5fa6}{#1}");
+defineMacro("\\maroonD", "\\textcolor{##ca337c}{#1}");
+defineMacro("\\maroonE", "\\textcolor{##9e034e}{#1}");
+defineMacro("\\purpleA", "\\textcolor{##ddd7ff}{#1}");
+defineMacro("\\purpleB", "\\textcolor{##c6b9fc}{#1}");
+defineMacro("\\purpleC", "\\textcolor{##aa87ff}{#1}");
+defineMacro("\\purpleD", "\\textcolor{##7854ab}{#1}");
+defineMacro("\\purpleE", "\\textcolor{##543b78}{#1}");
+defineMacro("\\mintA", "\\textcolor{##f5f9e8}{#1}");
+defineMacro("\\mintB", "\\textcolor{##edf2df}{#1}");
+defineMacro("\\mintC", "\\textcolor{##e0e5cc}{#1}");
+defineMacro("\\grayA", "\\textcolor{##f6f7f7}{#1}");
+defineMacro("\\grayB", "\\textcolor{##f0f1f2}{#1}");
+defineMacro("\\grayC", "\\textcolor{##e3e5e6}{#1}");
+defineMacro("\\grayD", "\\textcolor{##d6d8da}{#1}");
+defineMacro("\\grayE", "\\textcolor{##babec2}{#1}");
+defineMacro("\\grayF", "\\textcolor{##888d93}{#1}");
+defineMacro("\\grayG", "\\textcolor{##626569}{#1}");
+defineMacro("\\grayH", "\\textcolor{##3b3e40}{#1}");
+defineMacro("\\grayI", "\\textcolor{##21242c}{#1}");
+defineMacro("\\kaBlue", "\\textcolor{##314453}{#1}");
+defineMacro("\\kaGreen", "\\textcolor{##71B307}{#1}");
+;// CONCATENATED MODULE: ./src/MacroExpander.js
+/**
+ * This file contains the “gullet” where macros are expanded
+ * until only non-macro tokens remain.
+ */
+
+
+
+
+
+
+
+// List of commands that act like macros but aren't defined as a macro,
+// function, or symbol.  Used in `isDefined`.
+var implicitCommands = {
+  "^": true,
+  // Parser.js
+  "_": true,
+  // Parser.js
+  "\\limits": true,
+  // Parser.js
+  "\\nolimits": true // Parser.js
+
+};
+
+var MacroExpander = /*#__PURE__*/function () {
+  function MacroExpander(input, settings, mode) {
+    this.settings = void 0;
+    this.expansionCount = void 0;
+    this.lexer = void 0;
+    this.macros = void 0;
+    this.stack = void 0;
+    this.mode = void 0;
+    this.settings = settings;
+    this.expansionCount = 0;
+    this.feed(input); // Make new global namespace
+
+    this.macros = new Namespace(src_macros, settings.macros);
+    this.mode = mode;
+    this.stack = []; // contains tokens in REVERSE order
+  }
+  /**
+   * Feed a new input string to the same MacroExpander
+   * (with existing macros etc.).
+   */
+
+
+  var _proto = MacroExpander.prototype;
+
+  _proto.feed = function feed(input) {
+    this.lexer = new Lexer(input, this.settings);
+  }
+  /**
+   * Switches between "text" and "math" modes.
+   */
+  ;
+
+  _proto.switchMode = function switchMode(newMode) {
+    this.mode = newMode;
+  }
+  /**
+   * Start a new group nesting within all namespaces.
+   */
+  ;
+
+  _proto.beginGroup = function beginGroup() {
+    this.macros.beginGroup();
+  }
+  /**
+   * End current group nesting within all namespaces.
+   */
+  ;
+
+  _proto.endGroup = function endGroup() {
+    this.macros.endGroup();
+  }
+  /**
+   * Ends all currently nested groups (if any), restoring values before the
+   * groups began.  Useful in case of an error in the middle of parsing.
+   */
+  ;
+
+  _proto.endGroups = function endGroups() {
+    this.macros.endGroups();
+  }
+  /**
+   * Returns the topmost token on the stack, without expanding it.
+   * Similar in behavior to TeX's `\futurelet`.
+   */
+  ;
+
+  _proto.future = function future() {
+    if (this.stack.length === 0) {
+      this.pushToken(this.lexer.lex());
+    }
+
+    return this.stack[this.stack.length - 1];
+  }
+  /**
+   * Remove and return the next unexpanded token.
+   */
+  ;
+
+  _proto.popToken = function popToken() {
+    this.future(); // ensure non-empty stack
+
+    return this.stack.pop();
+  }
+  /**
+   * Add a given token to the token stack.  In particular, this get be used
+   * to put back a token returned from one of the other methods.
+   */
+  ;
+
+  _proto.pushToken = function pushToken(token) {
+    this.stack.push(token);
+  }
+  /**
+   * Append an array of tokens to the token stack.
+   */
+  ;
+
+  _proto.pushTokens = function pushTokens(tokens) {
+    var _this$stack;
+
+    (_this$stack = this.stack).push.apply(_this$stack, tokens);
+  }
+  /**
+   * Find an macro argument without expanding tokens and append the array of
+   * tokens to the token stack. Uses Token as a container for the result.
+   */
+  ;
+
+  _proto.scanArgument = function scanArgument(isOptional) {
+    var start;
+    var end;
+    var tokens;
+
+    if (isOptional) {
+      this.consumeSpaces(); // \@ifnextchar gobbles any space following it
+
+      if (this.future().text !== "[") {
+        return null;
+      }
+
+      start = this.popToken(); // don't include [ in tokens
+
+      var _this$consumeArg = this.consumeArg(["]"]);
+
+      tokens = _this$consumeArg.tokens;
+      end = _this$consumeArg.end;
+    } else {
+      var _this$consumeArg2 = this.consumeArg();
+
+      tokens = _this$consumeArg2.tokens;
+      start = _this$consumeArg2.start;
+      end = _this$consumeArg2.end;
+    } // indicate the end of an argument
+
+
+    this.pushToken(new Token("EOF", end.loc));
+    this.pushTokens(tokens);
+    return start.range(end, "");
+  }
+  /**
+   * Consume all following space tokens, without expansion.
+   */
+  ;
+
+  _proto.consumeSpaces = function consumeSpaces() {
+    for (;;) {
+      var token = this.future();
+
+      if (token.text === " ") {
+        this.stack.pop();
+      } else {
+        break;
+      }
+    }
+  }
+  /**
+   * Consume an argument from the token stream, and return the resulting array
+   * of tokens and start/end token.
+   */
+  ;
+
+  _proto.consumeArg = function consumeArg(delims) {
+    // The argument for a delimited parameter is the shortest (possibly
+    // empty) sequence of tokens with properly nested {...} groups that is
+    // followed ... by this particular list of non-parameter tokens.
+    // The argument for an undelimited parameter is the next nonblank
+    // token, unless that token is ‘{’, when the argument will be the
+    // entire {...} group that follows.
+    var tokens = [];
+    var isDelimited = delims && delims.length > 0;
+
+    if (!isDelimited) {
+      // Ignore spaces between arguments.  As the TeXbook says:
+      // "After you have said ‘\def\row#1#2{...}’, you are allowed to
+      //  put spaces between the arguments (e.g., ‘\row x n’), because
+      //  TeX doesn’t use single spaces as undelimited arguments."
+      this.consumeSpaces();
+    }
+
+    var start = this.future();
+    var tok;
+    var depth = 0;
+    var match = 0;
+
+    do {
+      tok = this.popToken();
+      tokens.push(tok);
+
+      if (tok.text === "{") {
+        ++depth;
+      } else if (tok.text === "}") {
+        --depth;
+
+        if (depth === -1) {
+          throw new src_ParseError("Extra }", tok);
+        }
+      } else if (tok.text === "EOF") {
+        throw new src_ParseError("Unexpected end of input in a macro argument" + ", expected '" + (delims && isDelimited ? delims[match] : "}") + "'", tok);
+      }
+
+      if (delims && isDelimited) {
+        if ((depth === 0 || depth === 1 && delims[match] === "{") && tok.text === delims[match]) {
+          ++match;
+
+          if (match === delims.length) {
+            // don't include delims in tokens
+            tokens.splice(-match, match);
+            break;
+          }
+        } else {
+          match = 0;
+        }
+      }
+    } while (depth !== 0 || isDelimited); // If the argument found ... has the form ‘{}’,
+    // ... the outermost braces enclosing the argument are removed
+
+
+    if (start.text === "{" && tokens[tokens.length - 1].text === "}") {
+      tokens.pop();
+      tokens.shift();
+    }
+
+    tokens.reverse(); // to fit in with stack order
+
+    return {
+      tokens: tokens,
+      start: start,
+      end: tok
+    };
+  }
+  /**
+   * Consume the specified number of (delimited) arguments from the token
+   * stream and return the resulting array of arguments.
+   */
+  ;
+
+  _proto.consumeArgs = function consumeArgs(numArgs, delimiters) {
+    if (delimiters) {
+      if (delimiters.length !== numArgs + 1) {
+        throw new src_ParseError("The length of delimiters doesn't match the number of args!");
+      }
+
+      var delims = delimiters[0];
+
+      for (var i = 0; i < delims.length; i++) {
+        var tok = this.popToken();
+
+        if (delims[i] !== tok.text) {
+          throw new src_ParseError("Use of the macro doesn't match its definition", tok);
+        }
+      }
+    }
+
+    var args = [];
+
+    for (var _i = 0; _i < numArgs; _i++) {
+      args.push(this.consumeArg(delimiters && delimiters[_i + 1]).tokens);
+    }
+
+    return args;
+  }
+  /**
+   * Expand the next token only once if possible.
+   *
+   * If the token is expanded, the resulting tokens will be pushed onto
+   * the stack in reverse order, and the number of such tokens will be
+   * returned.  This number might be zero or positive.
+   *
+   * If not, the return value is `false`, and the next token remains at the
+   * top of the stack.
+   *
+   * In either case, the next token will be on the top of the stack,
+   * or the stack will be empty (in case of empty expansion
+   * and no other tokens).
+   *
+   * Used to implement `expandAfterFuture` and `expandNextToken`.
+   *
+   * If expandableOnly, only expandable tokens are expanded and
+   * an undefined control sequence results in an error.
+   */
+  ;
+
+  _proto.expandOnce = function expandOnce(expandableOnly) {
+    var topToken = this.popToken();
+    var name = topToken.text;
+    var expansion = !topToken.noexpand ? this._getExpansion(name) : null;
+
+    if (expansion == null || expandableOnly && expansion.unexpandable) {
+      if (expandableOnly && expansion == null && name[0] === "\\" && !this.isDefined(name)) {
+        throw new src_ParseError("Undefined control sequence: " + name);
+      }
+
+      this.pushToken(topToken);
+      return false;
+    }
+
+    this.expansionCount++;
+
+    if (this.expansionCount > this.settings.maxExpand) {
+      throw new src_ParseError("Too many expansions: infinite loop or " + "need to increase maxExpand setting");
+    }
+
+    var tokens = expansion.tokens;
+    var args = this.consumeArgs(expansion.numArgs, expansion.delimiters);
+
+    if (expansion.numArgs) {
+      // paste arguments in place of the placeholders
+      tokens = tokens.slice(); // make a shallow copy
+
+      for (var i = tokens.length - 1; i >= 0; --i) {
+        var tok = tokens[i];
+
+        if (tok.text === "#") {
+          if (i === 0) {
+            throw new src_ParseError("Incomplete placeholder at end of macro body", tok);
+          }
+
+          tok = tokens[--i]; // next token on stack
+
+          if (tok.text === "#") {
+            // ## → #
+            tokens.splice(i + 1, 1); // drop first #
+          } else if (/^[1-9]$/.test(tok.text)) {
+            var _tokens;
+
+            // replace the placeholder with the indicated argument
+            (_tokens = tokens).splice.apply(_tokens, [i, 2].concat(args[+tok.text - 1]));
+          } else {
+            throw new src_ParseError("Not a valid argument number", tok);
+          }
+        }
+      }
+    } // Concatenate expansion onto top of stack.
+
+
+    this.pushTokens(tokens);
+    return tokens.length;
+  }
+  /**
+   * Expand the next token only once (if possible), and return the resulting
+   * top token on the stack (without removing anything from the stack).
+   * Similar in behavior to TeX's `\expandafter\futurelet`.
+   * Equivalent to expandOnce() followed by future().
+   */
+  ;
+
+  _proto.expandAfterFuture = function expandAfterFuture() {
+    this.expandOnce();
+    return this.future();
+  }
+  /**
+   * Recursively expand first token, then return first non-expandable token.
+   */
+  ;
+
+  _proto.expandNextToken = function expandNextToken() {
+    for (;;) {
+      if (this.expandOnce() === false) {
+        // fully expanded
+        var token = this.stack.pop(); // the token after \noexpand is interpreted as if its meaning
+        // were ‘\relax’
+
+        if (token.treatAsRelax) {
+          token.text = "\\relax";
+        }
+
+        return token;
+      }
+    } // Flow unable to figure out that this pathway is impossible.
+    // https://github.com/facebook/flow/issues/4808
+
+
+    throw new Error(); // eslint-disable-line no-unreachable
+  }
+  /**
+   * Fully expand the given macro name and return the resulting list of
+   * tokens, or return `undefined` if no such macro is defined.
+   */
+  ;
+
+  _proto.expandMacro = function expandMacro(name) {
+    return this.macros.has(name) ? this.expandTokens([new Token(name)]) : undefined;
+  }
+  /**
+   * Fully expand the given token stream and return the resulting list of
+   * tokens.  Note that the input tokens are in reverse order, but the
+   * output tokens are in forward order.
+   */
+  ;
+
+  _proto.expandTokens = function expandTokens(tokens) {
+    var output = [];
+    var oldStackLength = this.stack.length;
+    this.pushTokens(tokens);
+
+    while (this.stack.length > oldStackLength) {
+      // Expand only expandable tokens
+      if (this.expandOnce(true) === false) {
+        // fully expanded
+        var token = this.stack.pop();
+
+        if (token.treatAsRelax) {
+          // the expansion of \noexpand is the token itself
+          token.noexpand = false;
+          token.treatAsRelax = false;
+        }
+
+        output.push(token);
+      }
+    }
+
+    return output;
+  }
+  /**
+   * Fully expand the given macro name and return the result as a string,
+   * or return `undefined` if no such macro is defined.
+   */
+  ;
+
+  _proto.expandMacroAsText = function expandMacroAsText(name) {
+    var tokens = this.expandMacro(name);
+
+    if (tokens) {
+      return tokens.map(function (token) {
+        return token.text;
+      }).join("");
+    } else {
+      return tokens;
+    }
+  }
+  /**
+   * Returns the expanded macro as a reversed array of tokens and a macro
+   * argument count.  Or returns `null` if no such macro.
+   */
+  ;
+
+  _proto._getExpansion = function _getExpansion(name) {
+    var definition = this.macros.get(name);
+
+    if (definition == null) {
+      // mainly checking for undefined here
+      return definition;
+    } // If a single character has an associated catcode other than 13
+    // (active character), then don't expand it.
+
+
+    if (name.length === 1) {
+      var catcode = this.lexer.catcodes[name];
+
+      if (catcode != null && catcode !== 13) {
+        return;
+      }
+    }
+
+    var expansion = typeof definition === "function" ? definition(this) : definition;
+
+    if (typeof expansion === "string") {
+      var numArgs = 0;
+
+      if (expansion.indexOf("#") !== -1) {
+        var stripped = expansion.replace(/##/g, "");
+
+        while (stripped.indexOf("#" + (numArgs + 1)) !== -1) {
+          ++numArgs;
+        }
+      }
+
+      var bodyLexer = new Lexer(expansion, this.settings);
+      var tokens = [];
+      var tok = bodyLexer.lex();
+
+      while (tok.text !== "EOF") {
+        tokens.push(tok);
+        tok = bodyLexer.lex();
+      }
+
+      tokens.reverse(); // to fit in with stack using push and pop
+
+      var expanded = {
+        tokens: tokens,
+        numArgs: numArgs
+      };
+      return expanded;
+    }
+
+    return expansion;
+  }
+  /**
+   * Determine whether a command is currently "defined" (has some
+   * functionality), meaning that it's a macro (in the current group),
+   * a function, a symbol, or one of the special commands listed in
+   * `implicitCommands`.
+   */
+  ;
+
+  _proto.isDefined = function isDefined(name) {
+    return this.macros.has(name) || src_functions.hasOwnProperty(name) || src_symbols.math.hasOwnProperty(name) || src_symbols.text.hasOwnProperty(name) || implicitCommands.hasOwnProperty(name);
+  }
+  /**
+   * Determine whether a command is expandable.
+   */
+  ;
+
+  _proto.isExpandable = function isExpandable(name) {
+    var macro = this.macros.get(name);
+    return macro != null ? typeof macro === "string" || typeof macro === "function" || !macro.unexpandable : src_functions.hasOwnProperty(name) && !src_functions[name].primitive;
+  };
+
+  return MacroExpander;
+}();
+
+
+;// CONCATENATED MODULE: ./src/unicodeSupOrSub.js
+// Helpers for Parser.js handling of Unicode (sub|super)script characters.
+var unicodeSubRegEx = /^[₊₋₌₍₎₀₁₂₃₄₅₆₇₈₉ₐₑₕᵢⱼₖₗₘₙₒₚᵣₛₜᵤᵥₓᵦᵧᵨᵩᵪ]/;
+var uSubsAndSups = Object.freeze({
+  '₊': '+',
+  '₋': '-',
+  '₌': '=',
+  '₍': '(',
+  '₎': ')',
+  '₀': '0',
+  '₁': '1',
+  '₂': '2',
+  '₃': '3',
+  '₄': '4',
+  '₅': '5',
+  '₆': '6',
+  '₇': '7',
+  '₈': '8',
+  '₉': '9',
+  "\u2090": 'a',
+  "\u2091": 'e',
+  "\u2095": 'h',
+  "\u1D62": 'i',
+  "\u2C7C": 'j',
+  "\u2096": 'k',
+  "\u2097": 'l',
+  "\u2098": 'm',
+  "\u2099": 'n',
+  "\u2092": 'o',
+  "\u209A": 'p',
+  "\u1D63": 'r',
+  "\u209B": 's',
+  "\u209C": 't',
+  "\u1D64": 'u',
+  "\u1D65": 'v',
+  "\u2093": 'x',
+  "\u1D66": 'β',
+  "\u1D67": 'γ',
+  "\u1D68": 'ρ',
+  "\u1D69": "\u03D5",
+  "\u1D6A": 'χ',
+  '⁺': '+',
+  '⁻': '-',
+  '⁼': '=',
+  '⁽': '(',
+  '⁾': ')',
+  '⁰': '0',
+  '¹': '1',
+  '²': '2',
+  '³': '3',
+  '⁴': '4',
+  '⁵': '5',
+  '⁶': '6',
+  '⁷': '7',
+  '⁸': '8',
+  '⁹': '9',
+  "\u1D2C": 'A',
+  "\u1D2E": 'B',
+  "\u1D30": 'D',
+  "\u1D31": 'E',
+  "\u1D33": 'G',
+  "\u1D34": 'H',
+  "\u1D35": 'I',
+  "\u1D36": 'J',
+  "\u1D37": 'K',
+  "\u1D38": 'L',
+  "\u1D39": 'M',
+  "\u1D3A": 'N',
+  "\u1D3C": 'O',
+  "\u1D3E": 'P',
+  "\u1D3F": 'R',
+  "\u1D40": 'T',
+  "\u1D41": 'U',
+  "\u2C7D": 'V',
+  "\u1D42": 'W',
+  "\u1D43": 'a',
+  "\u1D47": 'b',
+  "\u1D9C": 'c',
+  "\u1D48": 'd',
+  "\u1D49": 'e',
+  "\u1DA0": 'f',
+  "\u1D4D": 'g',
+  "\u02B0": 'h',
+  "\u2071": 'i',
+  "\u02B2": 'j',
+  "\u1D4F": 'k',
+  "\u02E1": 'l',
+  "\u1D50": 'm',
+  "\u207F": 'n',
+  "\u1D52": 'o',
+  "\u1D56": 'p',
+  "\u02B3": 'r',
+  "\u02E2": 's',
+  "\u1D57": 't',
+  "\u1D58": 'u',
+  "\u1D5B": 'v',
+  "\u02B7": 'w',
+  "\u02E3": 'x',
+  "\u02B8": 'y',
+  "\u1DBB": 'z',
+  "\u1D5D": 'β',
+  "\u1D5E": 'γ',
+  "\u1D5F": 'δ',
+  "\u1D60": "\u03D5",
+  "\u1D61": 'χ',
+  "\u1DBF": 'θ'
+});
+;// CONCATENATED MODULE: ./src/Parser.js
+/* eslint no-constant-condition:0 */
+
+
+
+
+
+
+
+
+
+
+ // Pre-evaluate both modules as unicodeSymbols require String.normalize()
+
+var unicodeAccents = {
+  "́": {
+    "text": "\\'",
+    "math": "\\acute"
+  },
+  "̀": {
+    "text": "\\`",
+    "math": "\\grave"
+  },
+  "̈": {
+    "text": "\\\"",
+    "math": "\\ddot"
+  },
+  "̃": {
+    "text": "\\~",
+    "math": "\\tilde"
+  },
+  "̄": {
+    "text": "\\=",
+    "math": "\\bar"
+  },
+  "̆": {
+    "text": "\\u",
+    "math": "\\breve"
+  },
+  "̌": {
+    "text": "\\v",
+    "math": "\\check"
+  },
+  "̂": {
+    "text": "\\^",
+    "math": "\\hat"
+  },
+  "̇": {
+    "text": "\\.",
+    "math": "\\dot"
+  },
+  "̊": {
+    "text": "\\r",
+    "math": "\\mathring"
+  },
+  "̋": {
+    "text": "\\H"
+  },
+  "̧": {
+    "text": "\\c"
+  }
+};
+var unicodeSymbols = {
+  "á": "á",
+  "à": "à",
+  "ä": "ä",
+  "ǟ": "ǟ",
+  "ã": "ã",
+  "ā": "ā",
+  "ă": "ă",
+  "ắ": "ắ",
+  "ằ": "ằ",
+  "ẵ": "ẵ",
+  "ǎ": "ǎ",
+  "â": "â",
+  "ấ": "ấ",
+  "ầ": "ầ",
+  "ẫ": "ẫ",
+  "ȧ": "ȧ",
+  "ǡ": "ǡ",
+  "å": "å",
+  "ǻ": "ǻ",
+  "ḃ": "ḃ",
+  "ć": "ć",
+  "ḉ": "ḉ",
+  "č": "č",
+  "ĉ": "ĉ",
+  "ċ": "ċ",
+  "ç": "ç",
+  "ď": "ď",
+  "ḋ": "ḋ",
+  "ḑ": "ḑ",
+  "é": "é",
+  "è": "è",
+  "ë": "ë",
+  "ẽ": "ẽ",
+  "ē": "ē",
+  "ḗ": "ḗ",
+  "ḕ": "ḕ",
+  "ĕ": "ĕ",
+  "ḝ": "ḝ",
+  "ě": "ě",
+  "ê": "ê",
+  "ế": "ế",
+  "ề": "ề",
+  "ễ": "ễ",
+  "ė": "ė",
+  "ȩ": "ȩ",
+  "ḟ": "ḟ",
+  "ǵ": "ǵ",
+  "ḡ": "ḡ",
+  "ğ": "ğ",
+  "ǧ": "ǧ",
+  "ĝ": "ĝ",
+  "ġ": "ġ",
+  "ģ": "ģ",
+  "ḧ": "ḧ",
+  "ȟ": "ȟ",
+  "ĥ": "ĥ",
+  "ḣ": "ḣ",
+  "ḩ": "ḩ",
+  "í": "í",
+  "ì": "ì",
+  "ï": "ï",
+  "ḯ": "ḯ",
+  "ĩ": "ĩ",
+  "ī": "ī",
+  "ĭ": "ĭ",
+  "ǐ": "ǐ",
+  "î": "î",
+  "ǰ": "ǰ",
+  "ĵ": "ĵ",
+  "ḱ": "ḱ",
+  "ǩ": "ǩ",
+  "ķ": "ķ",
+  "ĺ": "ĺ",
+  "ľ": "ľ",
+  "ļ": "ļ",
+  "ḿ": "ḿ",
+  "ṁ": "ṁ",
+  "ń": "ń",
+  "ǹ": "ǹ",
+  "ñ": "ñ",
+  "ň": "ň",
+  "ṅ": "ṅ",
+  "ņ": "ņ",
+  "ó": "ó",
+  "ò": "ò",
+  "ö": "ö",
+  "ȫ": "ȫ",
+  "õ": "õ",
+  "ṍ": "ṍ",
+  "ṏ": "ṏ",
+  "ȭ": "ȭ",
+  "ō": "ō",
+  "ṓ": "ṓ",
+  "ṑ": "ṑ",
+  "ŏ": "ŏ",
+  "ǒ": "ǒ",
+  "ô": "ô",
+  "ố": "ố",
+  "ồ": "ồ",
+  "ỗ": "ỗ",
+  "ȯ": "ȯ",
+  "ȱ": "ȱ",
+  "ő": "ő",
+  "ṕ": "ṕ",
+  "ṗ": "ṗ",
+  "ŕ": "ŕ",
+  "ř": "ř",
+  "ṙ": "ṙ",
+  "ŗ": "ŗ",
+  "ś": "ś",
+  "ṥ": "ṥ",
+  "š": "š",
+  "ṧ": "ṧ",
+  "ŝ": "ŝ",
+  "ṡ": "ṡ",
+  "ş": "ş",
+  "ẗ": "ẗ",
+  "ť": "ť",
+  "ṫ": "ṫ",
+  "ţ": "ţ",
+  "ú": "ú",
+  "ù": "ù",
+  "ü": "ü",
+  "ǘ": "ǘ",
+  "ǜ": "ǜ",
+  "ǖ": "ǖ",
+  "ǚ": "ǚ",
+  "ũ": "ũ",
+  "ṹ": "ṹ",
+  "ū": "ū",
+  "ṻ": "ṻ",
+  "ŭ": "ŭ",
+  "ǔ": "ǔ",
+  "û": "û",
+  "ů": "ů",
+  "ű": "ű",
+  "ṽ": "ṽ",
+  "ẃ": "ẃ",
+  "ẁ": "ẁ",
+  "ẅ": "ẅ",
+  "ŵ": "ŵ",
+  "ẇ": "ẇ",
+  "ẘ": "ẘ",
+  "ẍ": "ẍ",
+  "ẋ": "ẋ",
+  "ý": "ý",
+  "ỳ": "ỳ",
+  "ÿ": "ÿ",
+  "ỹ": "ỹ",
+  "ȳ": "ȳ",
+  "ŷ": "ŷ",
+  "ẏ": "ẏ",
+  "ẙ": "ẙ",
+  "ź": "ź",
+  "ž": "ž",
+  "ẑ": "ẑ",
+  "ż": "ż",
+  "Á": "Á",
+  "À": "À",
+  "Ä": "Ä",
+  "Ǟ": "Ǟ",
+  "Ã": "Ã",
+  "Ā": "Ā",
+  "Ă": "Ă",
+  "Ắ": "Ắ",
+  "Ằ": "Ằ",
+  "Ẵ": "Ẵ",
+  "Ǎ": "Ǎ",
+  "Â": "Â",
+  "Ấ": "Ấ",
+  "Ầ": "Ầ",
+  "Ẫ": "Ẫ",
+  "Ȧ": "Ȧ",
+  "Ǡ": "Ǡ",
+  "Å": "Å",
+  "Ǻ": "Ǻ",
+  "Ḃ": "Ḃ",
+  "Ć": "Ć",
+  "Ḉ": "Ḉ",
+  "Č": "Č",
+  "Ĉ": "Ĉ",
+  "Ċ": "Ċ",
+  "Ç": "Ç",
+  "Ď": "Ď",
+  "Ḋ": "Ḋ",
+  "Ḑ": "Ḑ",
+  "É": "É",
+  "È": "È",
+  "Ë": "Ë",
+  "Ẽ": "Ẽ",
+  "Ē": "Ē",
+  "Ḗ": "Ḗ",
+  "Ḕ": "Ḕ",
+  "Ĕ": "Ĕ",
+  "Ḝ": "Ḝ",
+  "Ě": "Ě",
+  "Ê": "Ê",
+  "Ế": "Ế",
+  "Ề": "Ề",
+  "Ễ": "Ễ",
+  "Ė": "Ė",
+  "Ȩ": "Ȩ",
+  "Ḟ": "Ḟ",
+  "Ǵ": "Ǵ",
+  "Ḡ": "Ḡ",
+  "Ğ": "Ğ",
+  "Ǧ": "Ǧ",
+  "Ĝ": "Ĝ",
+  "Ġ": "Ġ",
+  "Ģ": "Ģ",
+  "Ḧ": "Ḧ",
+  "Ȟ": "Ȟ",
+  "Ĥ": "Ĥ",
+  "Ḣ": "Ḣ",
+  "Ḩ": "Ḩ",
+  "Í": "Í",
+  "Ì": "Ì",
+  "Ï": "Ï",
+  "Ḯ": "Ḯ",
+  "Ĩ": "Ĩ",
+  "Ī": "Ī",
+  "Ĭ": "Ĭ",
+  "Ǐ": "Ǐ",
+  "Î": "Î",
+  "İ": "İ",
+  "Ĵ": "Ĵ",
+  "Ḱ": "Ḱ",
+  "Ǩ": "Ǩ",
+  "Ķ": "Ķ",
+  "Ĺ": "Ĺ",
+  "Ľ": "Ľ",
+  "Ļ": "Ļ",
+  "Ḿ": "Ḿ",
+  "Ṁ": "Ṁ",
+  "Ń": "Ń",
+  "Ǹ": "Ǹ",
+  "Ñ": "Ñ",
+  "Ň": "Ň",
+  "Ṅ": "Ṅ",
+  "Ņ": "Ņ",
+  "Ó": "Ó",
+  "Ò": "Ò",
+  "Ö": "Ö",
+  "Ȫ": "Ȫ",
+  "Õ": "Õ",
+  "Ṍ": "Ṍ",
+  "Ṏ": "Ṏ",
+  "Ȭ": "Ȭ",
+  "Ō": "Ō",
+  "Ṓ": "Ṓ",
+  "Ṑ": "Ṑ",
+  "Ŏ": "Ŏ",
+  "Ǒ": "Ǒ",
+  "Ô": "Ô",
+  "Ố": "Ố",
+  "Ồ": "Ồ",
+  "Ỗ": "Ỗ",
+  "Ȯ": "Ȯ",
+  "Ȱ": "Ȱ",
+  "Ő": "Ő",
+  "Ṕ": "Ṕ",
+  "Ṗ": "Ṗ",
+  "Ŕ": "Ŕ",
+  "Ř": "Ř",
+  "Ṙ": "Ṙ",
+  "Ŗ": "Ŗ",
+  "Ś": "Ś",
+  "Ṥ": "Ṥ",
+  "Š": "Š",
+  "Ṧ": "Ṧ",
+  "Ŝ": "Ŝ",
+  "Ṡ": "Ṡ",
+  "Ş": "Ş",
+  "Ť": "Ť",
+  "Ṫ": "Ṫ",
+  "Ţ": "Ţ",
+  "Ú": "Ú",
+  "Ù": "Ù",
+  "Ü": "Ü",
+  "Ǘ": "Ǘ",
+  "Ǜ": "Ǜ",
+  "Ǖ": "Ǖ",
+  "Ǚ": "Ǚ",
+  "Ũ": "Ũ",
+  "Ṹ": "Ṹ",
+  "Ū": "Ū",
+  "Ṻ": "Ṻ",
+  "Ŭ": "Ŭ",
+  "Ǔ": "Ǔ",
+  "Û": "Û",
+  "Ů": "Ů",
+  "Ű": "Ű",
+  "Ṽ": "Ṽ",
+  "Ẃ": "Ẃ",
+  "Ẁ": "Ẁ",
+  "Ẅ": "Ẅ",
+  "Ŵ": "Ŵ",
+  "Ẇ": "Ẇ",
+  "Ẍ": "Ẍ",
+  "Ẋ": "Ẋ",
+  "Ý": "Ý",
+  "Ỳ": "Ỳ",
+  "Ÿ": "Ÿ",
+  "Ỹ": "Ỹ",
+  "Ȳ": "Ȳ",
+  "Ŷ": "Ŷ",
+  "Ẏ": "Ẏ",
+  "Ź": "Ź",
+  "Ž": "Ž",
+  "Ẑ": "Ẑ",
+  "Ż": "Ż",
+  "ά": "ά",
+  "ὰ": "ὰ",
+  "ᾱ": "ᾱ",
+  "ᾰ": "ᾰ",
+  "έ": "έ",
+  "ὲ": "ὲ",
+  "ή": "ή",
+  "ὴ": "ὴ",
+  "ί": "ί",
+  "ὶ": "ὶ",
+  "ϊ": "ϊ",
+  "ΐ": "ΐ",
+  "ῒ": "ῒ",
+  "ῑ": "ῑ",
+  "ῐ": "ῐ",
+  "ό": "ό",
+  "ὸ": "ὸ",
+  "ύ": "ύ",
+  "ὺ": "ὺ",
+  "ϋ": "ϋ",
+  "ΰ": "ΰ",
+  "ῢ": "ῢ",
+  "ῡ": "ῡ",
+  "ῠ": "ῠ",
+  "ώ": "ώ",
+  "ὼ": "ὼ",
+  "Ύ": "Ύ",
+  "Ὺ": "Ὺ",
+  "Ϋ": "Ϋ",
+  "Ῡ": "Ῡ",
+  "Ῠ": "Ῠ",
+  "Ώ": "Ώ",
+  "Ὼ": "Ὼ"
+};
+
+/**
+ * This file contains the parser used to parse out a TeX expression from the
+ * input. Since TeX isn't context-free, standard parsers don't work particularly
+ * well.
+ *
+ * The strategy of this parser is as such:
+ *
+ * The main functions (the `.parse...` ones) take a position in the current
+ * parse string to parse tokens from. The lexer (found in Lexer.js, stored at
+ * this.gullet.lexer) also supports pulling out tokens at arbitrary places. When
+ * individual tokens are needed at a position, the lexer is called to pull out a
+ * token, which is then used.
+ *
+ * The parser has a property called "mode" indicating the mode that
+ * the parser is currently in. Currently it has to be one of "math" or
+ * "text", which denotes whether the current environment is a math-y
+ * one or a text-y one (e.g. inside \text). Currently, this serves to
+ * limit the functions which can be used in text mode.
+ *
+ * The main functions then return an object which contains the useful data that
+ * was parsed at its given point, and a new position at the end of the parsed
+ * data. The main functions can call each other and continue the parsing by
+ * using the returned position as a new starting point.
+ *
+ * There are also extra `.handle...` functions, which pull out some reused
+ * functionality into self-contained functions.
+ *
+ * The functions return ParseNodes.
+ */
+var Parser = /*#__PURE__*/function () {
+  function Parser(input, settings) {
+    this.mode = void 0;
+    this.gullet = void 0;
+    this.settings = void 0;
+    this.leftrightDepth = void 0;
+    this.nextToken = void 0;
+    // Start in math mode
+    this.mode = "math"; // Create a new macro expander (gullet) and (indirectly via that) also a
+    // new lexer (mouth) for this parser (stomach, in the language of TeX)
+
+    this.gullet = new MacroExpander(input, settings, this.mode); // Store the settings for use in parsing
+
+    this.settings = settings; // Count leftright depth (for \middle errors)
+
+    this.leftrightDepth = 0;
+  }
+  /**
+   * Checks a result to make sure it has the right type, and throws an
+   * appropriate error otherwise.
+   */
+
+
+  var _proto = Parser.prototype;
+
+  _proto.expect = function expect(text, consume) {
+    if (consume === void 0) {
+      consume = true;
+    }
+
+    if (this.fetch().text !== text) {
+      throw new src_ParseError("Expected '" + text + "', got '" + this.fetch().text + "'", this.fetch());
+    }
+
+    if (consume) {
+      this.consume();
+    }
+  }
+  /**
+   * Discards the current lookahead token, considering it consumed.
+   */
+  ;
+
+  _proto.consume = function consume() {
+    this.nextToken = null;
+  }
+  /**
+   * Return the current lookahead token, or if there isn't one (at the
+   * beginning, or if the previous lookahead token was consume()d),
+   * fetch the next token as the new lookahead token and return it.
+   */
+  ;
+
+  _proto.fetch = function fetch() {
+    if (this.nextToken == null) {
+      this.nextToken = this.gullet.expandNextToken();
+    }
+
+    return this.nextToken;
+  }
+  /**
+   * Switches between "text" and "math" modes.
+   */
+  ;
+
+  _proto.switchMode = function switchMode(newMode) {
+    this.mode = newMode;
+    this.gullet.switchMode(newMode);
+  }
+  /**
+   * Main parsing function, which parses an entire input.
+   */
+  ;
+
+  _proto.parse = function parse() {
+    if (!this.settings.globalGroup) {
+      // Create a group namespace for the math expression.
+      // (LaTeX creates a new group for every $...$, $$...$$, \[...\].)
+      this.gullet.beginGroup();
+    } // Use old \color behavior (same as LaTeX's \textcolor) if requested.
+    // We do this within the group for the math expression, so it doesn't
+    // pollute settings.macros.
+
+
+    if (this.settings.colorIsTextColor) {
+      this.gullet.macros.set("\\color", "\\textcolor");
+    }
+
+    try {
+      // Try to parse the input
+      var parse = this.parseExpression(false); // If we succeeded, make sure there's an EOF at the end
+
+      this.expect("EOF"); // End the group namespace for the expression
+
+      if (!this.settings.globalGroup) {
+        this.gullet.endGroup();
+      }
+
+      return parse; // Close any leftover groups in case of a parse error.
+    } finally {
+      this.gullet.endGroups();
+    }
+  }
+  /**
+   * Fully parse a separate sequence of tokens as a separate job.
+   * Tokens should be specified in reverse order, as in a MacroDefinition.
+   */
+  ;
+
+  _proto.subparse = function subparse(tokens) {
+    // Save the next token from the current job.
+    var oldToken = this.nextToken;
+    this.consume(); // Run the new job, terminating it with an excess '}'
+
+    this.gullet.pushToken(new Token("}"));
+    this.gullet.pushTokens(tokens);
+    var parse = this.parseExpression(false);
+    this.expect("}"); // Restore the next token from the current job.
+
+    this.nextToken = oldToken;
+    return parse;
+  };
+
+  /**
+   * Parses an "expression", which is a list of atoms.
+   *
+   * `breakOnInfix`: Should the parsing stop when we hit infix nodes? This
+   *                 happens when functions have higher precedence han infix
+   *                 nodes in implicit parses.
+   *
+   * `breakOnTokenText`: The text of the token that the expression should end
+   *                     with, or `null` if something else should end the
+   *                     expression.
+   */
+  _proto.parseExpression = function parseExpression(breakOnInfix, breakOnTokenText) {
+    var body = []; // Keep adding atoms to the body until we can't parse any more atoms (either
+    // we reached the end, a }, or a \right)
+
+    while (true) {
+      // Ignore spaces in math mode
+      if (this.mode === "math") {
+        this.consumeSpaces();
+      }
+
+      var lex = this.fetch();
+
+      if (Parser.endOfExpression.indexOf(lex.text) !== -1) {
+        break;
+      }
+
+      if (breakOnTokenText && lex.text === breakOnTokenText) {
+        break;
+      }
+
+      if (breakOnInfix && src_functions[lex.text] && src_functions[lex.text].infix) {
+        break;
+      }
+
+      var atom = this.parseAtom(breakOnTokenText);
+
+      if (!atom) {
+        break;
+      } else if (atom.type === "internal") {
+        continue;
+      }
+
+      body.push(atom);
+    }
+
+    if (this.mode === "text") {
+      this.formLigatures(body);
+    }
+
+    return this.handleInfixNodes(body);
+  }
+  /**
+   * Rewrites infix operators such as \over with corresponding commands such
+   * as \frac.
+   *
+   * There can only be one infix operator per group.  If there's more than one
+   * then the expression is ambiguous.  This can be resolved by adding {}.
+   */
+  ;
+
+  _proto.handleInfixNodes = function handleInfixNodes(body) {
+    var overIndex = -1;
+    var funcName;
+
+    for (var i = 0; i < body.length; i++) {
+      if (body[i].type === "infix") {
+        if (overIndex !== -1) {
+          throw new src_ParseError("only one infix operator per group", body[i].token);
+        }
+
+        overIndex = i;
+        funcName = body[i].replaceWith;
+      }
+    }
+
+    if (overIndex !== -1 && funcName) {
+      var numerNode;
+      var denomNode;
+      var numerBody = body.slice(0, overIndex);
+      var denomBody = body.slice(overIndex + 1);
+
+      if (numerBody.length === 1 && numerBody[0].type === "ordgroup") {
+        numerNode = numerBody[0];
+      } else {
+        numerNode = {
+          type: "ordgroup",
+          mode: this.mode,
+          body: numerBody
+        };
+      }
+
+      if (denomBody.length === 1 && denomBody[0].type === "ordgroup") {
+        denomNode = denomBody[0];
+      } else {
+        denomNode = {
+          type: "ordgroup",
+          mode: this.mode,
+          body: denomBody
+        };
+      }
+
+      var node;
+
+      if (funcName === "\\\\abovefrac") {
+        node = this.callFunction(funcName, [numerNode, body[overIndex], denomNode], []);
+      } else {
+        node = this.callFunction(funcName, [numerNode, denomNode], []);
+      }
+
+      return [node];
+    } else {
+      return body;
+    }
+  }
+  /**
+   * Handle a subscript or superscript with nice errors.
+   */
+  ;
+
+  _proto.handleSupSubscript = function handleSupSubscript(name // For error reporting.
+  ) {
+    var symbolToken = this.fetch();
+    var symbol = symbolToken.text;
+    this.consume();
+    this.consumeSpaces(); // ignore spaces before sup/subscript argument
+
+    var group = this.parseGroup(name);
+
+    if (!group) {
+      throw new src_ParseError("Expected group after '" + symbol + "'", symbolToken);
+    }
+
+    return group;
+  }
+  /**
+   * Converts the textual input of an unsupported command into a text node
+   * contained within a color node whose color is determined by errorColor
+   */
+  ;
+
+  _proto.formatUnsupportedCmd = function formatUnsupportedCmd(text) {
+    var textordArray = [];
+
+    for (var i = 0; i < text.length; i++) {
+      textordArray.push({
+        type: "textord",
+        mode: "text",
+        text: text[i]
+      });
+    }
+
+    var textNode = {
+      type: "text",
+      mode: this.mode,
+      body: textordArray
+    };
+    var colorNode = {
+      type: "color",
+      mode: this.mode,
+      color: this.settings.errorColor,
+      body: [textNode]
+    };
+    return colorNode;
+  }
+  /**
+   * Parses a group with optional super/subscripts.
+   */
+  ;
+
+  _proto.parseAtom = function parseAtom(breakOnTokenText) {
+    // The body of an atom is an implicit group, so that things like
+    // \left(x\right)^2 work correctly.
+    var base = this.parseGroup("atom", breakOnTokenText); // In text mode, we don't have superscripts or subscripts
+
+    if (this.mode === "text") {
+      return base;
+    } // Note that base may be empty (i.e. null) at this point.
+
+
+    var superscript;
+    var subscript;
+
+    while (true) {
+      // Guaranteed in math mode, so eat any spaces first.
+      this.consumeSpaces(); // Lex the first token
+
+      var lex = this.fetch();
+
+      if (lex.text === "\\limits" || lex.text === "\\nolimits") {
+        // We got a limit control
+        if (base && base.type === "op") {
+          var limits = lex.text === "\\limits";
+          base.limits = limits;
+          base.alwaysHandleSupSub = true;
+        } else if (base && base.type === "operatorname") {
+          if (base.alwaysHandleSupSub) {
+            base.limits = lex.text === "\\limits";
+          }
+        } else {
+          throw new src_ParseError("Limit controls must follow a math operator", lex);
+        }
+
+        this.consume();
+      } else if (lex.text === "^") {
+        // We got a superscript start
+        if (superscript) {
+          throw new src_ParseError("Double superscript", lex);
+        }
+
+        superscript = this.handleSupSubscript("superscript");
+      } else if (lex.text === "_") {
+        // We got a subscript start
+        if (subscript) {
+          throw new src_ParseError("Double subscript", lex);
+        }
+
+        subscript = this.handleSupSubscript("subscript");
+      } else if (lex.text === "'") {
+        // We got a prime
+        if (superscript) {
+          throw new src_ParseError("Double superscript", lex);
+        }
+
+        var prime = {
+          type: "textord",
+          mode: this.mode,
+          text: "\\prime"
+        }; // Many primes can be grouped together, so we handle this here
+
+        var primes = [prime];
+        this.consume(); // Keep lexing tokens until we get something that's not a prime
+
+        while (this.fetch().text === "'") {
+          // For each one, add another prime to the list
+          primes.push(prime);
+          this.consume();
+        } // If there's a superscript following the primes, combine that
+        // superscript in with the primes.
+
+
+        if (this.fetch().text === "^") {
+          primes.push(this.handleSupSubscript("superscript"));
+        } // Put everything into an ordgroup as the superscript
+
+
+        superscript = {
+          type: "ordgroup",
+          mode: this.mode,
+          body: primes
+        };
+      } else if (uSubsAndSups[lex.text]) {
+        // A Unicode subscript or superscript character.
+        // We treat these similarly to the unicode-math package.
+        // So we render a string of Unicode (sub|super)scripts the
+        // same as a (sub|super)script of regular characters.
+        var str = uSubsAndSups[lex.text];
+        var isSub = unicodeSubRegEx.test(lex.text);
+        this.consume(); // Continue fetching tokens to fill out the string.
+
+        while (true) {
+          var token = this.fetch().text;
+
+          if (!uSubsAndSups[token]) {
+            break;
+          }
+
+          if (unicodeSubRegEx.test(token) !== isSub) {
+            break;
+          }
+
+          this.consume();
+          str += uSubsAndSups[token];
+        } // Now create a (sub|super)script.
+
+
+        var body = new Parser(str, this.settings).parse();
+
+        if (isSub) {
+          subscript = {
+            type: "ordgroup",
+            mode: "math",
+            body: body
+          };
+        } else {
+          superscript = {
+            type: "ordgroup",
+            mode: "math",
+            body: body
+          };
+        }
+      } else {
+        // If it wasn't ^, _, or ', stop parsing super/subscripts
+        break;
+      }
+    } // Base must be set if superscript or subscript are set per logic above,
+    // but need to check here for type check to pass.
+
+
+    if (superscript || subscript) {
+      // If we got either a superscript or subscript, create a supsub
+      return {
+        type: "supsub",
+        mode: this.mode,
+        base: base,
+        sup: superscript,
+        sub: subscript
+      };
+    } else {
+      // Otherwise return the original body
+      return base;
+    }
+  }
+  /**
+   * Parses an entire function, including its base and all of its arguments.
+   */
+  ;
+
+  _proto.parseFunction = function parseFunction(breakOnTokenText, name // For determining its context
+  ) {
+    var token = this.fetch();
+    var func = token.text;
+    var funcData = src_functions[func];
+
+    if (!funcData) {
+      return null;
+    }
+
+    this.consume(); // consume command token
+
+    if (name && name !== "atom" && !funcData.allowedInArgument) {
+      throw new src_ParseError("Got function '" + func + "' with no arguments" + (name ? " as " + name : ""), token);
+    } else if (this.mode === "text" && !funcData.allowedInText) {
+      throw new src_ParseError("Can't use function '" + func + "' in text mode", token);
+    } else if (this.mode === "math" && funcData.allowedInMath === false) {
+      throw new src_ParseError("Can't use function '" + func + "' in math mode", token);
+    }
+
+    var _this$parseArguments = this.parseArguments(func, funcData),
+        args = _this$parseArguments.args,
+        optArgs = _this$parseArguments.optArgs;
+
+    return this.callFunction(func, args, optArgs, token, breakOnTokenText);
+  }
+  /**
+   * Call a function handler with a suitable context and arguments.
+   */
+  ;
+
+  _proto.callFunction = function callFunction(name, args, optArgs, token, breakOnTokenText) {
+    var context = {
+      funcName: name,
+      parser: this,
+      token: token,
+      breakOnTokenText: breakOnTokenText
+    };
+    var func = src_functions[name];
+
+    if (func && func.handler) {
+      return func.handler(context, args, optArgs);
+    } else {
+      throw new src_ParseError("No function handler for " + name);
+    }
+  }
+  /**
+   * Parses the arguments of a function or environment
+   */
+  ;
+
+  _proto.parseArguments = function parseArguments(func, // Should look like "\name" or "\begin{name}".
+  funcData) {
+    var totalArgs = funcData.numArgs + funcData.numOptionalArgs;
+
+    if (totalArgs === 0) {
+      return {
+        args: [],
+        optArgs: []
+      };
+    }
+
+    var args = [];
+    var optArgs = [];
+
+    for (var i = 0; i < totalArgs; i++) {
+      var argType = funcData.argTypes && funcData.argTypes[i];
+      var isOptional = i < funcData.numOptionalArgs;
+
+      if (funcData.primitive && argType == null || // \sqrt expands into primitive if optional argument doesn't exist
+      funcData.type === "sqrt" && i === 1 && optArgs[0] == null) {
+        argType = "primitive";
+      }
+
+      var arg = this.parseGroupOfType("argument to '" + func + "'", argType, isOptional);
+
+      if (isOptional) {
+        optArgs.push(arg);
+      } else if (arg != null) {
+        args.push(arg);
+      } else {
+        // should be unreachable
+        throw new src_ParseError("Null argument, please report this as a bug");
+      }
+    }
+
+    return {
+      args: args,
+      optArgs: optArgs
+    };
+  }
+  /**
+   * Parses a group when the mode is changing.
+   */
+  ;
+
+  _proto.parseGroupOfType = function parseGroupOfType(name, type, optional) {
+    switch (type) {
+      case "color":
+        return this.parseColorGroup(optional);
+
+      case "size":
+        return this.parseSizeGroup(optional);
+
+      case "url":
+        return this.parseUrlGroup(optional);
+
+      case "math":
+      case "text":
+        return this.parseArgumentGroup(optional, type);
+
+      case "hbox":
+        {
+          // hbox argument type wraps the argument in the equivalent of
+          // \hbox, which is like \text but switching to \textstyle size.
+          var group = this.parseArgumentGroup(optional, "text");
+          return group != null ? {
+            type: "styling",
+            mode: group.mode,
+            body: [group],
+            style: "text" // simulate \textstyle
+
+          } : null;
+        }
+
+      case "raw":
+        {
+          var token = this.parseStringGroup("raw", optional);
+          return token != null ? {
+            type: "raw",
+            mode: "text",
+            string: token.text
+          } : null;
+        }
+
+      case "primitive":
+        {
+          if (optional) {
+            throw new src_ParseError("A primitive argument cannot be optional");
+          }
+
+          var _group = this.parseGroup(name);
+
+          if (_group == null) {
+            throw new src_ParseError("Expected group as " + name, this.fetch());
+          }
+
+          return _group;
+        }
+
+      case "original":
+      case null:
+      case undefined:
+        return this.parseArgumentGroup(optional);
+
+      default:
+        throw new src_ParseError("Unknown group type as " + name, this.fetch());
+    }
+  }
+  /**
+   * Discard any space tokens, fetching the next non-space token.
+   */
+  ;
+
+  _proto.consumeSpaces = function consumeSpaces() {
+    while (this.fetch().text === " ") {
+      this.consume();
+    }
+  }
+  /**
+   * Parses a group, essentially returning the string formed by the
+   * brace-enclosed tokens plus some position information.
+   */
+  ;
+
+  _proto.parseStringGroup = function parseStringGroup(modeName, // Used to describe the mode in error messages.
+  optional) {
+    var argToken = this.gullet.scanArgument(optional);
+
+    if (argToken == null) {
+      return null;
+    }
+
+    var str = "";
+    var nextToken;
+
+    while ((nextToken = this.fetch()).text !== "EOF") {
+      str += nextToken.text;
+      this.consume();
+    }
+
+    this.consume(); // consume the end of the argument
+
+    argToken.text = str;
+    return argToken;
+  }
+  /**
+   * Parses a regex-delimited group: the largest sequence of tokens
+   * whose concatenated strings match `regex`. Returns the string
+   * formed by the tokens plus some position information.
+   */
+  ;
+
+  _proto.parseRegexGroup = function parseRegexGroup(regex, modeName // Used to describe the mode in error messages.
+  ) {
+    var firstToken = this.fetch();
+    var lastToken = firstToken;
+    var str = "";
+    var nextToken;
+
+    while ((nextToken = this.fetch()).text !== "EOF" && regex.test(str + nextToken.text)) {
+      lastToken = nextToken;
+      str += lastToken.text;
+      this.consume();
+    }
+
+    if (str === "") {
+      throw new src_ParseError("Invalid " + modeName + ": '" + firstToken.text + "'", firstToken);
+    }
+
+    return firstToken.range(lastToken, str);
+  }
+  /**
+   * Parses a color description.
+   */
+  ;
+
+  _proto.parseColorGroup = function parseColorGroup(optional) {
+    var res = this.parseStringGroup("color", optional);
+
+    if (res == null) {
+      return null;
+    }
+
+    var match = /^(#[a-f0-9]{3}|#?[a-f0-9]{6}|[a-z]+)$/i.exec(res.text);
+
+    if (!match) {
+      throw new src_ParseError("Invalid color: '" + res.text + "'", res);
+    }
+
+    var color = match[0];
+
+    if (/^[0-9a-f]{6}$/i.test(color)) {
+      // We allow a 6-digit HTML color spec without a leading "#".
+      // This follows the xcolor package's HTML color model.
+      // Predefined color names are all missed by this RegEx pattern.
+      color = "#" + color;
+    }
+
+    return {
+      type: "color-token",
+      mode: this.mode,
+      color: color
+    };
+  }
+  /**
+   * Parses a size specification, consisting of magnitude and unit.
+   */
+  ;
+
+  _proto.parseSizeGroup = function parseSizeGroup(optional) {
+    var res;
+    var isBlank = false; // don't expand before parseStringGroup
+
+    this.gullet.consumeSpaces();
+
+    if (!optional && this.gullet.future().text !== "{") {
+      res = this.parseRegexGroup(/^[-+]? *(?:$|\d+|\d+\.\d*|\.\d*) *[a-z]{0,2} *$/, "size");
+    } else {
+      res = this.parseStringGroup("size", optional);
+    }
+
+    if (!res) {
+      return null;
+    }
+
+    if (!optional && res.text.length === 0) {
+      // Because we've tested for what is !optional, this block won't
+      // affect \kern, \hspace, etc. It will capture the mandatory arguments
+      // to \genfrac and \above.
+      res.text = "0pt"; // Enable \above{}
+
+      isBlank = true; // This is here specifically for \genfrac
+    }
+
+    var match = /([-+]?) *(\d+(?:\.\d*)?|\.\d+) *([a-z]{2})/.exec(res.text);
+
+    if (!match) {
+      throw new src_ParseError("Invalid size: '" + res.text + "'", res);
+    }
+
+    var data = {
+      number: +(match[1] + match[2]),
+      // sign + magnitude, cast to number
+      unit: match[3]
+    };
+
+    if (!validUnit(data)) {
+      throw new src_ParseError("Invalid unit: '" + data.unit + "'", res);
+    }
+
+    return {
+      type: "size",
+      mode: this.mode,
+      value: data,
+      isBlank: isBlank
+    };
+  }
+  /**
+   * Parses an URL, checking escaped letters and allowed protocols,
+   * and setting the catcode of % as an active character (as in \hyperref).
+   */
+  ;
+
+  _proto.parseUrlGroup = function parseUrlGroup(optional) {
+    this.gullet.lexer.setCatcode("%", 13); // active character
+
+    this.gullet.lexer.setCatcode("~", 12); // other character
+
+    var res = this.parseStringGroup("url", optional);
+    this.gullet.lexer.setCatcode("%", 14); // comment character
+
+    this.gullet.lexer.setCatcode("~", 13); // active character
+
+    if (res == null) {
+      return null;
+    } // hyperref package allows backslashes alone in href, but doesn't
+    // generate valid links in such cases; we interpret this as
+    // "undefined" behaviour, and keep them as-is. Some browser will
+    // replace backslashes with forward slashes.
+
+
+    var url = res.text.replace(/\\([#$%&~_^{}])/g, '$1');
+    return {
+      type: "url",
+      mode: this.mode,
+      url: url
+    };
+  }
+  /**
+   * Parses an argument with the mode specified.
+   */
+  ;
+
+  _proto.parseArgumentGroup = function parseArgumentGroup(optional, mode) {
+    var argToken = this.gullet.scanArgument(optional);
+
+    if (argToken == null) {
+      return null;
+    }
+
+    var outerMode = this.mode;
+
+    if (mode) {
+      // Switch to specified mode
+      this.switchMode(mode);
+    }
+
+    this.gullet.beginGroup();
+    var expression = this.parseExpression(false, "EOF"); // TODO: find an alternative way to denote the end
+
+    this.expect("EOF"); // expect the end of the argument
+
+    this.gullet.endGroup();
+    var result = {
+      type: "ordgroup",
+      mode: this.mode,
+      loc: argToken.loc,
+      body: expression
+    };
+
+    if (mode) {
+      // Switch mode back
+      this.switchMode(outerMode);
+    }
+
+    return result;
+  }
+  /**
+   * Parses an ordinary group, which is either a single nucleus (like "x")
+   * or an expression in braces (like "{x+y}") or an implicit group, a group
+   * that starts at the current position, and ends right before a higher explicit
+   * group ends, or at EOF.
+   */
+  ;
+
+  _proto.parseGroup = function parseGroup(name, // For error reporting.
+  breakOnTokenText) {
+    var firstToken = this.fetch();
+    var text = firstToken.text;
+    var result; // Try to parse an open brace or \begingroup
+
+    if (text === "{" || text === "\\begingroup") {
+      this.consume();
+      var groupEnd = text === "{" ? "}" : "\\endgroup";
+      this.gullet.beginGroup(); // If we get a brace, parse an expression
+
+      var expression = this.parseExpression(false, groupEnd);
+      var lastToken = this.fetch();
+      this.expect(groupEnd); // Check that we got a matching closing brace
+
+      this.gullet.endGroup();
+      result = {
+        type: "ordgroup",
+        mode: this.mode,
+        loc: SourceLocation.range(firstToken, lastToken),
+        body: expression,
+        // A group formed by \begingroup...\endgroup is a semi-simple group
+        // which doesn't affect spacing in math mode, i.e., is transparent.
+        // https://tex.stackexchange.com/questions/1930/when-should-one-
+        // use-begingroup-instead-of-bgroup
+        semisimple: text === "\\begingroup" || undefined
+      };
+    } else {
+      // If there exists a function with this name, parse the function.
+      // Otherwise, just return a nucleus
+      result = this.parseFunction(breakOnTokenText, name) || this.parseSymbol();
+
+      if (result == null && text[0] === "\\" && !implicitCommands.hasOwnProperty(text)) {
+        if (this.settings.throwOnError) {
+          throw new src_ParseError("Undefined control sequence: " + text, firstToken);
+        }
+
+        result = this.formatUnsupportedCmd(text);
+        this.consume();
+      }
+    }
+
+    return result;
+  }
+  /**
+   * Form ligature-like combinations of characters for text mode.
+   * This includes inputs like "--", "---", "``" and "''".
+   * The result will simply replace multiple textord nodes with a single
+   * character in each value by a single textord node having multiple
+   * characters in its value.  The representation is still ASCII source.
+   * The group will be modified in place.
+   */
+  ;
+
+  _proto.formLigatures = function formLigatures(group) {
+    var n = group.length - 1;
+
+    for (var i = 0; i < n; ++i) {
+      var a = group[i]; // $FlowFixMe: Not every node type has a `text` property.
+
+      var v = a.text;
+
+      if (v === "-" && group[i + 1].text === "-") {
+        if (i + 1 < n && group[i + 2].text === "-") {
+          group.splice(i, 3, {
+            type: "textord",
+            mode: "text",
+            loc: SourceLocation.range(a, group[i + 2]),
+            text: "---"
+          });
+          n -= 2;
+        } else {
+          group.splice(i, 2, {
+            type: "textord",
+            mode: "text",
+            loc: SourceLocation.range(a, group[i + 1]),
+            text: "--"
+          });
+          n -= 1;
+        }
+      }
+
+      if ((v === "'" || v === "`") && group[i + 1].text === v) {
+        group.splice(i, 2, {
+          type: "textord",
+          mode: "text",
+          loc: SourceLocation.range(a, group[i + 1]),
+          text: v + v
+        });
+        n -= 1;
+      }
+    }
+  }
+  /**
+   * Parse a single symbol out of the string. Here, we handle single character
+   * symbols and special functions like \verb.
+   */
+  ;
+
+  _proto.parseSymbol = function parseSymbol() {
+    var nucleus = this.fetch();
+    var text = nucleus.text;
+
+    if (/^\\verb[^a-zA-Z]/.test(text)) {
+      this.consume();
+      var arg = text.slice(5);
+      var star = arg.charAt(0) === "*";
+
+      if (star) {
+        arg = arg.slice(1);
+      } // Lexer's tokenRegex is constructed to always have matching
+      // first/last characters.
+
+
+      if (arg.length < 2 || arg.charAt(0) !== arg.slice(-1)) {
+        throw new src_ParseError("\\verb assertion failed --\n                    please report what input caused this bug");
+      }
+
+      arg = arg.slice(1, -1); // remove first and last char
+
+      return {
+        type: "verb",
+        mode: "text",
+        body: arg,
+        star: star
+      };
+    } // At this point, we should have a symbol, possibly with accents.
+    // First expand any accented base symbol according to unicodeSymbols.
+
+
+    if (unicodeSymbols.hasOwnProperty(text[0]) && !src_symbols[this.mode][text[0]]) {
+      // This behavior is not strict (XeTeX-compatible) in math mode.
+      if (this.settings.strict && this.mode === "math") {
+        this.settings.reportNonstrict("unicodeTextInMathMode", "Accented Unicode text character \"" + text[0] + "\" used in " + "math mode", nucleus);
+      }
+
+      text = unicodeSymbols[text[0]] + text.slice(1);
+    } // Strip off any combining characters
+
+
+    var match = combiningDiacriticalMarksEndRegex.exec(text);
+
+    if (match) {
+      text = text.substring(0, match.index);
+
+      if (text === 'i') {
+        text = "\u0131"; // dotless i, in math and text mode
+      } else if (text === 'j') {
+        text = "\u0237"; // dotless j, in math and text mode
+      }
+    } // Recognize base symbol
+
+
+    var symbol;
+
+    if (src_symbols[this.mode][text]) {
+      if (this.settings.strict && this.mode === 'math' && extraLatin.indexOf(text) >= 0) {
+        this.settings.reportNonstrict("unicodeTextInMathMode", "Latin-1/Unicode text character \"" + text[0] + "\" used in " + "math mode", nucleus);
+      }
+
+      var group = src_symbols[this.mode][text].group;
+      var loc = SourceLocation.range(nucleus);
+      var s;
+
+      if (ATOMS.hasOwnProperty(group)) {
+        // $FlowFixMe
+        var family = group;
+        s = {
+          type: "atom",
+          mode: this.mode,
+          family: family,
+          loc: loc,
+          text: text
+        };
+      } else {
+        // $FlowFixMe
+        s = {
+          type: group,
+          mode: this.mode,
+          loc: loc,
+          text: text
+        };
+      } // $FlowFixMe
+
+
+      symbol = s;
+    } else if (text.charCodeAt(0) >= 0x80) {
+      // no symbol for e.g. ^
+      if (this.settings.strict) {
+        if (!supportedCodepoint(text.charCodeAt(0))) {
+          this.settings.reportNonstrict("unknownSymbol", "Unrecognized Unicode character \"" + text[0] + "\"" + (" (" + text.charCodeAt(0) + ")"), nucleus);
+        } else if (this.mode === "math") {
+          this.settings.reportNonstrict("unicodeTextInMathMode", "Unicode text character \"" + text[0] + "\" used in math mode", nucleus);
+        }
+      } // All nonmathematical Unicode characters are rendered as if they
+      // are in text mode (wrapped in \text) because that's what it
+      // takes to render them in LaTeX.  Setting `mode: this.mode` is
+      // another natural choice (the user requested math mode), but
+      // this makes it more difficult for getCharacterMetrics() to
+      // distinguish Unicode characters without metrics and those for
+      // which we want to simulate the letter M.
+
+
+      symbol = {
+        type: "textord",
+        mode: "text",
+        loc: SourceLocation.range(nucleus),
+        text: text
+      };
+    } else {
+      return null; // EOF, ^, _, {, }, etc.
+    }
+
+    this.consume(); // Transform combining characters into accents
+
+    if (match) {
+      for (var i = 0; i < match[0].length; i++) {
+        var accent = match[0][i];
+
+        if (!unicodeAccents[accent]) {
+          throw new src_ParseError("Unknown accent ' " + accent + "'", nucleus);
+        }
+
+        var command = unicodeAccents[accent][this.mode] || unicodeAccents[accent].text;
+
+        if (!command) {
+          throw new src_ParseError("Accent " + accent + " unsupported in " + this.mode + " mode", nucleus);
+        }
+
+        symbol = {
+          type: "accent",
+          mode: this.mode,
+          loc: SourceLocation.range(nucleus),
+          label: command,
+          isStretchy: false,
+          isShifty: true,
+          // $FlowFixMe
+          base: symbol
+        };
+      }
+    } // $FlowFixMe
+
+
+    return symbol;
+  };
+
+  return Parser;
+}();
+
+Parser.endOfExpression = ["}", "\\endgroup", "\\end", "\\right", "&"];
+
+;// CONCATENATED MODULE: ./src/parseTree.js
+/**
+ * Provides a single function for parsing an expression using a Parser
+ * TODO(emily): Remove this
+ */
+
+
+
+
+/**
+ * Parses an expression using a Parser, then returns the parsed result.
+ */
+var parseTree = function parseTree(toParse, settings) {
+  if (!(typeof toParse === 'string' || toParse instanceof String)) {
+    throw new TypeError('KaTeX can only parse string typed expression');
+  }
+
+  var parser = new Parser(toParse, settings); // Blank out any \df@tag to avoid spurious "Duplicate \tag" errors
+
+  delete parser.gullet.macros.current["\\df@tag"];
+  var tree = parser.parse(); // Prevent a color definition from persisting between calls to katex.render().
+
+  delete parser.gullet.macros.current["\\current@color"];
+  delete parser.gullet.macros.current["\\color"]; // If the input used \tag, it will set the \df@tag macro to the tag.
+  // In this case, we separately parse the tag and wrap the tree.
+
+  if (parser.gullet.macros.get("\\df@tag")) {
+    if (!settings.displayMode) {
+      throw new src_ParseError("\\tag works only in display equations");
+    }
+
+    tree = [{
+      type: "tag",
+      mode: "text",
+      body: tree,
+      tag: parser.subparse([new Token("\\df@tag")])
+    }];
+  }
+
+  return tree;
+};
+
+/* harmony default export */ var src_parseTree = (parseTree);
+;// CONCATENATED MODULE: ./katex.js
+/* eslint no-console:0 */
+
+/**
+ * This is the main entry point for KaTeX. Here, we expose functions for
+ * rendering expressions either to DOM nodes or to markup strings.
+ *
+ * We also expose the ParseError class to check if errors thrown from KaTeX are
+ * errors in the expression, or errors in javascript handling.
+ */
+
+
+
+
+
+
+
+
+
+
+
+/**
+ * Parse and build an expression, and place that expression in the DOM node
+ * given.
+ */
+var render = function render(expression, baseNode, options) {
+  baseNode.textContent = "";
+  var node = renderToDomTree(expression, options).toNode();
+  baseNode.appendChild(node);
+}; // KaTeX's styles don't work properly in quirks mode. Print out an error, and
+// disable rendering.
+
+
+if (typeof document !== "undefined") {
+  if (document.compatMode !== "CSS1Compat") {
+    typeof console !== "undefined" && console.warn("Warning: KaTeX doesn't work in quirks mode. Make sure your " + "website has a suitable doctype.");
+
+    render = function render() {
+      throw new src_ParseError("KaTeX doesn't work in quirks mode.");
+    };
+  }
+}
+/**
+ * Parse and build an expression, and return the markup for that.
+ */
+
+
+var renderToString = function renderToString(expression, options) {
+  var markup = renderToDomTree(expression, options).toMarkup();
+  return markup;
+};
+/**
+ * Parse an expression and return the parse tree.
+ */
+
+
+var generateParseTree = function generateParseTree(expression, options) {
+  var settings = new Settings(options);
+  return src_parseTree(expression, settings);
+};
+/**
+ * If the given error is a KaTeX ParseError and options.throwOnError is false,
+ * renders the invalid LaTeX as a span with hover title giving the KaTeX
+ * error message.  Otherwise, simply throws the error.
+ */
+
+
+var renderError = function renderError(error, expression, options) {
+  if (options.throwOnError || !(error instanceof src_ParseError)) {
+    throw error;
+  }
+
+  var node = buildCommon.makeSpan(["katex-error"], [new SymbolNode(expression)]);
+  node.setAttribute("title", error.toString());
+  node.setAttribute("style", "color:" + options.errorColor);
+  return node;
+};
+/**
+ * Generates and returns the katex build tree. This is used for advanced
+ * use cases (like rendering to custom output).
+ */
+
+
+var renderToDomTree = function renderToDomTree(expression, options) {
+  var settings = new Settings(options);
+
+  try {
+    var tree = src_parseTree(expression, settings);
+    return buildTree(tree, expression, settings);
+  } catch (error) {
+    return renderError(error, expression, settings);
+  }
+};
+/**
+ * Generates and returns the katex build tree, with just HTML (no MathML).
+ * This is used for advanced use cases (like rendering to custom output).
+ */
+
+
+var renderToHTMLTree = function renderToHTMLTree(expression, options) {
+  var settings = new Settings(options);
+
+  try {
+    var tree = src_parseTree(expression, settings);
+    return buildHTMLTree(tree, expression, settings);
+  } catch (error) {
+    return renderError(error, expression, settings);
+  }
+};
+
+/* harmony default export */ var katex = ({
+  /**
+   * Current KaTeX version
+   */
+  version: "0.16.9",
+
+  /**
+   * Renders the given LaTeX into an HTML+MathML combination, and adds
+   * it as a child to the specified DOM node.
+   */
+  render: render,
+
+  /**
+   * Renders the given LaTeX into an HTML+MathML combination string,
+   * for sending to the client.
+   */
+  renderToString: renderToString,
+
+  /**
+   * KaTeX error, usually during parsing.
+   */
+  ParseError: src_ParseError,
+
+  /**
+   * The shema of Settings
+   */
+  SETTINGS_SCHEMA: SETTINGS_SCHEMA,
+
+  /**
+   * Parses the given LaTeX into KaTeX's internal parse tree structure,
+   * without rendering to HTML or MathML.
+   *
+   * NOTE: This method is not currently recommended for public use.
+   * The internal tree representation is unstable and is very likely
+   * to change. Use at your own risk.
+   */
+  __parse: generateParseTree,
+
+  /**
+   * Renders the given LaTeX into an HTML+MathML internal DOM tree
+   * representation, without flattening that representation to a string.
+   *
+   * NOTE: This method is not currently recommended for public use.
+   * The internal tree representation is unstable and is very likely
+   * to change. Use at your own risk.
+   */
+  __renderToDomTree: renderToDomTree,
+
+  /**
+   * Renders the given LaTeX into an HTML internal DOM tree representation,
+   * without MathML and without flattening that representation to a string.
+   *
+   * NOTE: This method is not currently recommended for public use.
+   * The internal tree representation is unstable and is very likely
+   * to change. Use at your own risk.
+   */
+  __renderToHTMLTree: renderToHTMLTree,
+
+  /**
+   * extends internal font metrics object with a new object
+   * each key in the new object represents a font name
+  */
+  __setFontMetrics: setFontMetrics,
+
+  /**
+   * adds a new symbol to builtin symbols table
+   */
+  __defineSymbol: defineSymbol,
+
+  /**
+   * adds a new function to builtin function list,
+   * which directly produce parse tree elements
+   * and have their own html/mathml builders
+   */
+  __defineFunction: defineFunction,
+
+  /**
+   * adds a new macro to builtin macro list
+   */
+  __defineMacro: defineMacro,
+
+  /**
+   * Expose the dom tree node types, which can be useful for type checking nodes.
+   *
+   * NOTE: This method is not currently recommended for public use.
+   * The internal tree representation is unstable and is very likely
+   * to change. Use at your own risk.
+   */
+  __domTree: {
+    Span: Span,
+    Anchor: Anchor,
+    SymbolNode: SymbolNode,
+    SvgNode: SvgNode,
+    PathNode: PathNode,
+    LineNode: LineNode
+  }
+});
+;// CONCATENATED MODULE: ./katex.webpack.js
+/**
+ * This is the webpack entry point for KaTeX. As ECMAScript, flow[1] and jest[2]
+ * doesn't support CSS modules natively, a separate entry point is used and
+ * it is not flowtyped.
+ *
+ * [1] https://gist.github.com/lambdahands/d19e0da96285b749f0ef
+ * [2] https://facebook.github.io/jest/docs/en/webpack.html
+ */
+
+
+/* harmony default export */ var katex_webpack = (katex);
+__webpack_exports__ = __webpack_exports__["default"];
+/******/ 	return __webpack_exports__;
+/******/ })()
+;
+});
\ No newline at end of file
diff --git a/javascript/extLibs/http_cdn.jsdelivr.net_npm_marked_marked.min.js b/javascript/extLibs/http_cdn.jsdelivr.net_npm_marked_marked.min.js
new file mode 100644
index 0000000..4052d1b
--- /dev/null
+++ b/javascript/extLibs/http_cdn.jsdelivr.net_npm_marked_marked.min.js
@@ -0,0 +1,6 @@
+/**
+ * marked v15.0.7 - a markdown parser
+ * Copyright (c) 2011-2025, Christopher Jeffrey. (MIT Licensed)
+ * https://github.com/markedjs/marked
+ */
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e="undefined"!=typeof globalThis?globalThis:e||self).marked={})}(this,(function(e){"use strict";function t(){return{async:!1,breaks:!1,extensions:null,gfm:!0,hooks:null,pedantic:!1,renderer:null,silent:!1,tokenizer:null,walkTokens:null}}function n(t){e.defaults=t}e.defaults={async:!1,breaks:!1,extensions:null,gfm:!0,hooks:null,pedantic:!1,renderer:null,silent:!1,tokenizer:null,walkTokens:null};const s={exec:()=>null};function r(e,t=""){let n="string"==typeof e?e:e.source;const s={replace:(e,t)=>{let r="string"==typeof t?t:t.source;return r=r.replace(i.caret,"$1"),n=n.replace(e,r),s},getRegex:()=>new RegExp(n,t)};return s}const i={codeRemoveIndent:/^(?: {1,4}| {0,3}\t)/gm,outputLinkReplace:/\\([\[\]])/g,indentCodeCompensation:/^(\s+)(?:```)/,beginningSpace:/^\s+/,endingHash:/#$/,startingSpaceChar:/^ /,endingSpaceChar:/ $/,nonSpaceChar:/[^ 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l;for(l=0;l1,r={type:"list",raw:"",ordered:s,start:s?+n.slice(0,-1):"",loose:!1,items:[]};n=s?`\\d{1,9}\\${n.slice(-1)}`:`\\${n}`,this.options.pedantic&&(n=s?n:"[*+-]");const i=this.rules.other.listItemRegex(n);let l=!1;for(;e;){let n=!1,s="",o="";if(!(t=i.exec(e)))break;if(this.rules.block.hr.test(e))break;s=t[0],e=e.substring(s.length);let a=t[2].split("\n",1)[0].replace(this.rules.other.listReplaceTabs,(e=>" ".repeat(3*e.length))),c=e.split("\n",1)[0],h=!a.trim(),p=0;if(this.options.pedantic?(p=2,o=a.trimStart()):h?p=t[1].length+1:(p=t[2].search(this.rules.other.nonSpaceChar),p=p>4?1:p,o=a.slice(p),p+=t[1].length),h&&this.rules.other.blankLine.test(c)&&(s+=c+"\n",e=e.substring(c.length+1),n=!0),!n){const t=this.rules.other.nextBulletRegex(p),n=this.rules.other.hrRegex(p),r=this.rules.other.fencesBeginRegex(p),i=this.rules.other.headingBeginRegex(p),l=this.rules.other.htmlBeginRegex(p);for(;e;){const u=e.split("\n",1)[0];let g;if(c=u,this.options.pedantic?(c=c.replace(this.rules.other.listReplaceNesting,"  "),g=c):g=c.replace(this.rules.other.tabCharGlobal,"    "),r.test(c))break;if(i.test(c))break;if(l.test(c))break;if(t.test(c))break;if(n.test(c))break;if(g.search(this.rules.other.nonSpaceChar)>=p||!c.trim())o+="\n"+g.slice(p);else{if(h)break;if(a.replace(this.rules.other.tabCharGlobal,"    ").search(this.rules.other.nonSpaceChar)>=4)break;if(r.test(a))break;if(i.test(a))break;if(n.test(a))break;o+="\n"+c}h||c.trim()||(h=!0),s+=u+"\n",e=e.substring(u.length+1),a=g.slice(p)}}r.loose||(l?r.loose=!0:this.rules.other.doubleBlankLine.test(s)&&(l=!0));let u,g=null;this.options.gfm&&(g=this.rules.other.listIsTask.exec(o),g&&(u="[ ] "!==g[0],o=o.replace(this.rules.other.listReplaceTask,""))),r.items.push({type:"list_item",raw:s,task:!!g,checked:u,loose:!1,text:o,tokens:[]}),r.raw+=s}const o=r.items.at(-1);if(!o)return;o.raw=o.raw.trimEnd(),o.text=o.text.trimEnd(),r.raw=r.raw.trimEnd();for(let e=0;e"space"===e.type)),n=t.length>0&&t.some((e=>this.rules.other.anyLine.test(e.raw)));r.loose=n}if(r.loose)for(let e=0;e({text:e,tokens:this.lexer.inline(e),header:!1,align:i.align[t]}))));return i}}lheading(e){const t=this.rules.block.lheading.exec(e);if(t)return{type:"heading",raw:t[0],depth:"="===t[2].charAt(0)?1:2,text:t[1],tokens:this.lexer.inline(t[1])}}paragraph(e){const t=this.rules.block.paragraph.exec(e);if(t){const e="\n"===t[1].charAt(t[1].length-1)?t[1].slice(0,-1):t[1];return{type:"paragraph",raw:t[0],text:e,tokens:this.lexer.inline(e)}}}text(e){const t=this.rules.block.text.exec(e);if(t)return{type:"text",raw:t[0],text:t[0],tokens:this.lexer.inline(t[0])}}escape(e){const t=this.rules.inline.escape.exec(e);if(t)return{type:"escape",raw:t[0],text:t[1]}}tag(e){const t=this.rules.inline.tag.exec(e);if(t)return!this.lexer.state.inLink&&this.rules.other.startATag.test(t[0])?this.lexer.state.inLink=!0:this.lexer.state.inLink&&this.rules.other.endATag.test(t[0])&&(this.lexer.state.inLink=!1),!this.lexer.state.inRawBlock&&this.rules.other.startPreScriptTag.test(t[0])?this.lexer.state.inRawBlock=!0:this.lexer.state.inRawBlock&&this.rules.other.endPreScriptTag.test(t[0])&&(this.lexer.state.inRawBlock=!1),{type:"html",raw:t[0],inLink:this.lexer.state.inLink,inRawBlock:this.lexer.state.inRawBlock,block:!1,text:t[0]}}link(e){const t=this.rules.inline.link.exec(e);if(t){const e=t[2].trim();if(!this.options.pedantic&&this.rules.other.startAngleBracket.test(e)){if(!this.rules.other.endAngleBracket.test(e))return;const t=te(e.slice(0,-1),"\\");if((e.length-t.length)%2==0)return}else{const e=function(e,t){if(-1===e.indexOf(t[1]))return-1;let n=0;for(let s=0;s-1){const n=(0===t[0].indexOf("!")?5:4)+t[1].length+e;t[2]=t[2].substring(0,e),t[0]=t[0].substring(0,n).trim(),t[3]=""}}let n=t[2],s="";if(this.options.pedantic){const e=this.rules.other.pedanticHrefTitle.exec(n);e&&(n=e[1],s=e[3])}else s=t[3]?t[3].slice(1,-1):"";return n=n.trim(),this.rules.other.startAngleBracket.test(n)&&(n=this.options.pedantic&&!this.rules.other.endAngleBracket.test(e)?n.slice(1):n.slice(1,-1)),ne(t,{href:n?n.replace(this.rules.inline.anyPunctuation,"$1"):n,title:s?s.replace(this.rules.inline.anyPunctuation,"$1"):s},t[0],this.lexer,this.rules)}}reflink(e,t){let n;if((n=this.rules.inline.reflink.exec(e))||(n=this.rules.inline.nolink.exec(e))){const e=t[(n[2]||n[1]).replace(this.rules.other.multipleSpaceGlobal," ").toLowerCase()];if(!e){const e=n[0].charAt(0);return{type:"text",raw:e,text:e}}return ne(n,e,n[0],this.lexer,this.rules)}}emStrong(e,t,n=""){let s=this.rules.inline.emStrongLDelim.exec(e);if(!s)return;if(s[3]&&n.match(this.rules.other.unicodeAlphaNumeric))return;if(!(s[1]||s[2]||"")||!n||this.rules.inline.punctuation.exec(n)){const n=[...s[0]].length-1;let r,i,l=n,o=0;const a="*"===s[0][0]?this.rules.inline.emStrongRDelimAst:this.rules.inline.emStrongRDelimUnd;for(a.lastIndex=0,t=t.slice(-1*e.length+n);null!=(s=a.exec(t));){if(r=s[1]||s[2]||s[3]||s[4]||s[5]||s[6],!r)continue;if(i=[...r].length,s[3]||s[4]){l+=i;continue}if((s[5]||s[6])&&n%3&&!((n+i)%3)){o+=i;continue}if(l-=i,l>0)continue;i=Math.min(i,i+l+o);const t=[...s[0]][0].length,a=e.slice(0,n+s.index+t+i);if(Math.min(n,i)%2){const e=a.slice(1,-1);return{type:"em",raw:a,text:e,tokens:this.lexer.inlineTokens(e)}}const c=a.slice(2,-2);return{type:"strong",raw:a,text:c,tokens:this.lexer.inlineTokens(c)}}}}codespan(e){const t=this.rules.inline.code.exec(e);if(t){let e=t[2].replace(this.rules.other.newLineCharGlobal," ");const n=this.rules.other.nonSpaceChar.test(e),s=this.rules.other.startingSpaceChar.test(e)&&this.rules.other.endingSpaceChar.test(e);return n&&s&&(e=e.substring(1,e.length-1)),{type:"codespan",raw:t[0],text:e}}}br(e){const t=this.rules.inline.br.exec(e);if(t)return{type:"br",raw:t[0]}}del(e){const t=this.rules.inline.del.exec(e);if(t)return{type:"del",raw:t[0],text:t[2],tokens:this.lexer.inlineTokens(t[2])}}autolink(e){const t=this.rules.inline.autolink.exec(e);if(t){let e,n;return"@"===t[2]?(e=t[1],n="mailto:"+e):(e=t[1],n=e),{type:"link",raw:t[0],text:e,href:n,tokens:[{type:"text",raw:e,text:e}]}}}url(e){let t;if(t=this.rules.inline.url.exec(e)){let e,n;if("@"===t[2])e=t[0],n="mailto:"+e;else{let s;do{s=t[0],t[0]=this.rules.inline._backpedal.exec(t[0])?.[0]??""}while(s!==t[0]);e=t[0],n="www."===t[1]?"http://"+t[0]:t[0]}return{type:"link",raw:t[0],text:e,href:n,tokens:[{type:"text",raw:e,text:e}]}}}inlineText(e){const t=this.rules.inline.text.exec(e);if(t){const e=this.lexer.state.inRawBlock;return{type:"text",raw:t[0],text:t[0],escaped:e}}}}class re{tokens;options;state;tokenizer;inlineQueue;constructor(t){this.tokens=[],this.tokens.links=Object.create(null),this.options=t||e.defaults,this.options.tokenizer=this.options.tokenizer||new se,this.tokenizer=this.options.tokenizer,this.tokenizer.options=this.options,this.tokenizer.lexer=this,this.inlineQueue=[],this.state={inLink:!1,inRawBlock:!1,top:!0};const n={other:i,block:U.normal,inline:J.normal};this.options.pedantic?(n.block=U.pedantic,n.inline=J.pedantic):this.options.gfm&&(n.block=U.gfm,this.options.breaks?n.inline=J.breaks:n.inline=J.gfm),this.tokenizer.rules=n}static get rules(){return{block:U,inline:J}}static lex(e,t){return new re(t).lex(e)}static lexInline(e,t){return new re(t).inlineTokens(e)}lex(e){e=e.replace(i.carriageReturn,"\n"),this.blockTokens(e,this.tokens);for(let e=0;e!!(s=n.call({lexer:this},e,t))&&(e=e.substring(s.raw.length),t.push(s),!0))))continue;if(s=this.tokenizer.space(e)){e=e.substring(s.raw.length);const n=t.at(-1);1===s.raw.length&&void 0!==n?n.raw+="\n":t.push(s);continue}if(s=this.tokenizer.code(e)){e=e.substring(s.raw.length);const n=t.at(-1);"paragraph"===n?.type||"text"===n?.type?(n.raw+="\n"+s.raw,n.text+="\n"+s.text,this.inlineQueue.at(-1).src=n.text):t.push(s);continue}if(s=this.tokenizer.fences(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.heading(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.hr(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.blockquote(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.list(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.html(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.def(e)){e=e.substring(s.raw.length);const n=t.at(-1);"paragraph"===n?.type||"text"===n?.type?(n.raw+="\n"+s.raw,n.text+="\n"+s.raw,this.inlineQueue.at(-1).src=n.text):this.tokens.links[s.tag]||(this.tokens.links[s.tag]={href:s.href,title:s.title});continue}if(s=this.tokenizer.table(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.lheading(e)){e=e.substring(s.raw.length),t.push(s);continue}let r=e;if(this.options.extensions?.startBlock){let t=1/0;const n=e.slice(1);let s;this.options.extensions.startBlock.forEach((e=>{s=e.call({lexer:this},n),"number"==typeof s&&s>=0&&(t=Math.min(t,s))})),t<1/0&&t>=0&&(r=e.substring(0,t+1))}if(this.state.top&&(s=this.tokenizer.paragraph(r))){const i=t.at(-1);n&&"paragraph"===i?.type?(i.raw+="\n"+s.raw,i.text+="\n"+s.text,this.inlineQueue.pop(),this.inlineQueue.at(-1).src=i.text):t.push(s),n=r.length!==e.length,e=e.substring(s.raw.length)}else if(s=this.tokenizer.text(e)){e=e.substring(s.raw.length);const n=t.at(-1);"text"===n?.type?(n.raw+="\n"+s.raw,n.text+="\n"+s.text,this.inlineQueue.pop(),this.inlineQueue.at(-1).src=n.text):t.push(s)}else if(e){const t="Infinite loop on byte: "+e.charCodeAt(0);if(this.options.silent){console.error(t);break}throw new Error(t)}}return this.state.top=!0,t}inline(e,t=[]){return this.inlineQueue.push({src:e,tokens:t}),t}inlineTokens(e,t=[]){let n=e,s=null;if(this.tokens.links){const e=Object.keys(this.tokens.links);if(e.length>0)for(;null!=(s=this.tokenizer.rules.inline.reflinkSearch.exec(n));)e.includes(s[0].slice(s[0].lastIndexOf("[")+1,-1))&&(n=n.slice(0,s.index)+"["+"a".repeat(s[0].length-2)+"]"+n.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex))}for(;null!=(s=this.tokenizer.rules.inline.blockSkip.exec(n));)n=n.slice(0,s.index)+"["+"a".repeat(s[0].length-2)+"]"+n.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);for(;null!=(s=this.tokenizer.rules.inline.anyPunctuation.exec(n));)n=n.slice(0,s.index)+"++"+n.slice(this.tokenizer.rules.inline.anyPunctuation.lastIndex);let r=!1,i="";for(;e;){let s;if(r||(i=""),r=!1,this.options.extensions?.inline?.some((n=>!!(s=n.call({lexer:this},e,t))&&(e=e.substring(s.raw.length),t.push(s),!0))))continue;if(s=this.tokenizer.escape(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.tag(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.link(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.reflink(e,this.tokens.links)){e=e.substring(s.raw.length);const n=t.at(-1);"text"===s.type&&"text"===n?.type?(n.raw+=s.raw,n.text+=s.text):t.push(s);continue}if(s=this.tokenizer.emStrong(e,n,i)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.codespan(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.br(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.del(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.autolink(e)){e=e.substring(s.raw.length),t.push(s);continue}if(!this.state.inLink&&(s=this.tokenizer.url(e))){e=e.substring(s.raw.length),t.push(s);continue}let l=e;if(this.options.extensions?.startInline){let t=1/0;const n=e.slice(1);let s;this.options.extensions.startInline.forEach((e=>{s=e.call({lexer:this},n),"number"==typeof s&&s>=0&&(t=Math.min(t,s))})),t<1/0&&t>=0&&(l=e.substring(0,t+1))}if(s=this.tokenizer.inlineText(l)){e=e.substring(s.raw.length),"_"!==s.raw.slice(-1)&&(i=s.raw.slice(-1)),r=!0;const n=t.at(-1);"text"===n?.type?(n.raw+=s.raw,n.text+=s.text):t.push(s)}else if(e){const t="Infinite loop on byte: "+e.charCodeAt(0);if(this.options.silent){console.error(t);break}throw new Error(t)}}return t}}class ie{options;parser;constructor(t){this.options=t||e.defaults}space(e){return""}code({text:e,lang:t,escaped:n}){const s=(t||"").match(i.notSpaceStart)?.[0],r=e.replace(i.endingNewline,"")+"\n";return s?'
'+(n?r:W(r,!0))+"
\n":"
"+(n?r:W(r,!0))+"
\n"}blockquote({tokens:e}){return`
\n${this.parser.parse(e)}
\n`}html({text:e}){return e}heading({tokens:e,depth:t}){return`${this.parser.parseInline(e)}\n`}hr(e){return"
\n"}list(e){const t=e.ordered,n=e.start;let s="";for(let t=0;t\n"+s+"\n"}listitem(e){let t="";if(e.task){const n=this.checkbox({checked:!!e.checked});e.loose?"paragraph"===e.tokens[0]?.type?(e.tokens[0].text=n+" "+e.tokens[0].text,e.tokens[0].tokens&&e.tokens[0].tokens.length>0&&"text"===e.tokens[0].tokens[0].type&&(e.tokens[0].tokens[0].text=n+" "+W(e.tokens[0].tokens[0].text),e.tokens[0].tokens[0].escaped=!0)):e.tokens.unshift({type:"text",raw:n+" ",text:n+" ",escaped:!0}):t+=n+" "}return t+=this.parser.parse(e.tokens,!!e.loose),`
  • ${t}
    • \n`}checkbox({checked:e}){return"'}paragraph({tokens:e}){return`
    ${this.parser.parseInline(e)}
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new file mode 100644
index 0000000..b7da2e5
--- /dev/null
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e=this.texClass,r=this.prevClass;if(e===l.TEXCLASS.NONE)return t;if(t?(!t.getProperty("autoOP")||e!==l.TEXCLASS.BIN&&e!==l.TEXCLASS.REL||(r=t.texClass=l.TEXCLASS.ORD),r=this.prevClass=t.texClass||l.TEXCLASS.ORD,this.prevLevel=this.attributes.getInherited("scriptlevel")):r=this.prevClass=l.TEXCLASS.NONE,e!==l.TEXCLASS.BIN||r!==l.TEXCLASS.NONE&&r!==l.TEXCLASS.BIN&&r!==l.TEXCLASS.OP&&r!==l.TEXCLASS.REL&&r!==l.TEXCLASS.OPEN&&r!==l.TEXCLASS.PUNCT)if(r!==l.TEXCLASS.BIN||e!==l.TEXCLASS.REL&&e!==l.TEXCLASS.CLOSE&&e!==l.TEXCLASS.PUNCT){if(e===l.TEXCLASS.BIN){for(var n=this,o=this.parent;o&&o.parent&&o.isEmbellished&&(1===o.childNodes.length||!o.isKind("mrow")&&o.core()===n);)n=o,o=o.parent;o.childNodes[o.childNodes.length-1]===n&&(this.texClass=l.TEXCLASS.ORD)}}else t.texClass=this.prevClass=l.TEXCLASS.ORD;else this.texClass=l.TEXCLASS.ORD;return this},e.prototype.setInheritedAttributes=function(e,r,n,o){void 0===e&&(e={}),void 0===r&&(r=!1),void 0===n&&(n=0),void 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t=this,e=this.parent,r=this.Parent;r&&r.isEmbellished;)t=e,e=r.parent,r=r.Parent;if(e&&e.isKind("mrow")&&1!==e.nonSpaceLength()){if(e.firstNonSpace()===t)return["prefix","infix","postfix"];if(e.lastNonSpace()===t)return["postfix","infix","prefix"]}return["infix","prefix","postfix"]},e.prototype.handleExplicitForm=function(t){if(this.attributes.isSet("form")){var e=this.attributes.get("form");t=[e].concat(t.filter((function(t){return t!==e})))}return t},e.prototype.checkPseudoScripts=function(t){var e=this.constructor.pseudoScripts;if(t.match(e)){var r=this.coreParent().Parent,n=!r||!(r.isKind("msubsup")&&!r.isKind("msub"));this.setProperty("pseudoscript",n),n&&(this.attributes.setInherited("lspace",0),this.attributes.setInherited("rspace",0))}},e.prototype.checkPrimes=function(t){var e=this.constructor.primes;if(t.match(e)){var r=this.constructor.remapPrimes,n=(0,u.unicodeString)((0,u.unicodeChars)(t).map((function(t){return r[t]})));this.setProperty("primes",n)}},e.prototype.checkMathAccent=function(t){var e=this.Parent;if(void 0===this.getProperty("mathaccent")&&e&&e.isKind("munderover")){var r=e.childNodes[0];if(!r.isEmbellished||r.coreMO()!==this){var n=this.constructor.mathaccents;t.match(n)&&this.setProperty("mathaccent",!0)}}},e.defaults=i(i({},l.AbstractMmlTokenNode.defaults),{form:"infix",fence:!1,separator:!1,lspace:"thickmathspace",rspace:"thickmathspace",stretchy:!1,symmetric:!1,maxsize:"infinity",minsize:"0em",largeop:!1,movablelimits:!1,accent:!1,linebreak:"auto",lineleading:"1ex",linebreakstyle:"before",indentalign:"auto",indentshift:"0",indenttarget:"",indentalignfirst:"indentalign",indentshiftfirst:"indentshift",indentalignlast:"indentalign",indentshiftlast:"indentshift"}),e.MMLSPACING=c.MMLSPACING,e.OPTABLE=c.OPTABLE,e.pseudoScripts=new 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r=s(this.childNodes),n=r.next();!n.done;n=r.next()){var o=n.value;if(o&&!o.isSpacelike)return o}}catch(e){t={error:e}}finally{try{n&&!n.done&&(e=r.return)&&e.call(r)}finally{if(t)throw t.error}}return null},e.prototype.lastNonSpace=function(){for(var t=this.childNodes.length;--t>=0;){var e=this.childNodes[t];if(e&&!e.isSpacelike)return e}return null},e.prototype.setTeXclass=function(t){var e,r,n,o;if(null!=this.getProperty("open")||null!=this.getProperty("close")){this.getPrevClass(t),t=null;try{for(var i=s(this.childNodes),l=i.next();!l.done;l=i.next()){t=l.value.setTeXclass(t)}}catch(t){e={error:t}}finally{try{l&&!l.done&&(r=i.return)&&r.call(i)}finally{if(e)throw e.error}}null==this.texClass&&(this.texClass=a.TEXCLASS.INNER)}else{try{for(var c=s(this.childNodes),u=c.next();!u.done;u=c.next()){t=u.value.setTeXclass(t)}}catch(t){n={error:t}}finally{try{u&&!u.done&&(o=c.return)&&o.call(c)}finally{if(n)throw n.error}}this.childNodes[0]&&this.updateTeXclass(this.childNodes[0])}return 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p=u.value;e[p]&&this.attributes.setInherited(p,e[p][1]),void 0!==this.attributes.getExplicit(p)&&delete this.attributes.getAllAttributes()[p]}}catch(t){i={error:t}}finally{try{u&&!u.done&&(l=c.return)&&l.call(c)}finally{if(i)throw i.error}}t.prototype.setInheritedAttributes.call(this,e,r,n,o)},e.prototype.setChildInheritedAttributes=function(t,e,r,n){var o,i,a,c;try{for(var u=s(this.childNodes),p=u.next();!p.done;p=u.next()){(y=p.value).isKind("mtr")||this.replaceChild(this.factory.create("mtr"),y).appendChild(y)}}catch(t){o={error:t}}finally{try{p&&!p.done&&(i=u.return)&&i.call(u)}finally{if(o)throw o.error}}r=this.getProperty("scriptlevel")||r,e=!(!this.attributes.getExplicit("displaystyle")&&!this.attributes.getDefault("displaystyle")),t=this.addInheritedAttributes(t,{columnalign:this.attributes.get("columnalign"),rowalign:"center"});var h=this.attributes.getExplicit("data-cramped"),f=(0,l.split)(this.attributes.get("rowalign"));try{for(var 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this.init(),l},t.OPTIONS={skipHtmlTags:["script","noscript","style","textarea","pre","code","annotation","annotation-xml"],includeHtmlTags:{br:"\n",wbr:"","#comment":""},ignoreHtmlClass:"mathjax_ignore",processHtmlClass:"mathjax_process"},t}();e.HTMLDomStrings=i},3726:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)Object.prototype.hasOwnProperty.call(e,r)&&(t[r]=e[r])},n(t,e)},function(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Class extends value "+String(e)+" is not a constructor or null");function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)});Object.defineProperty(e,"__esModule",{value:!0}),e.HTMLHandler=void 0;var i=r(3670),s=r(3683),a=function(t){function e(){var e=null!==t&&t.apply(this,arguments)||this;return e.documentClass=s.HTMLDocument,e}return 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o(e,t),e.prototype.setAdaptor=function(e){t.prototype.setAdaptor.call(this,e),this.findMathML.adaptor=e,this.mathml.adaptor=e},e.prototype.setMmlFactory=function(e){t.prototype.setMmlFactory.call(this,e),this.mathml.setMmlFactory(e)},Object.defineProperty(e.prototype,"processStrings",{get:function(){return!1},enumerable:!1,configurable:!0}),e.prototype.compile=function(t,e){var r=t.start.node;if(!r||!t.end.node||this.options.forceReparse||"#text"===this.adaptor.kind(r)){var n=this.executeFilters(this.preFilters,t,e,(t.math||"").trim()),o=this.checkForErrors(this.adaptor.parse(n,"text/"+this.options.parseAs)),i=this.adaptor.body(o);1!==this.adaptor.childNodes(i).length&&this.error("MathML must consist of a single element"),r=this.adaptor.remove(this.adaptor.firstChild(i)),"math"!==this.adaptor.kind(r).replace(/^[a-z]+:/,"")&&this.error("MathML must be formed by a  element, not <"+this.adaptor.kind(r)+">")}return r=this.executeFilters(this.mmlFilters,t,e,r),this.executeFilters(this.postFilters,t,e,this.mathml.compile(r))},e.prototype.checkForErrors=function(t){var e=this.adaptor.tags(this.adaptor.body(t),"parsererror")[0];return e&&(""===this.adaptor.textContent(e)&&this.error("Error processing MathML"),this.options.parseError.call(this,e)),t},e.prototype.error=function(t){throw new Error(t)},e.prototype.findMath=function(t){return this.findMathML.findMath(t)},e.NAME="MathML",e.OPTIONS=(0,a.defaultOptions)({parseAs:"html",forceReparse:!1,FindMathML:null,MathMLCompile:null,parseError:function(t){this.error(this.adaptor.textContent(t).replace(/\n.*/g,""))}},s.AbstractInputJax.OPTIONS),e}(s.AbstractInputJax);e.MathML=p},625:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in 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l.CharacterMap("AMSsymbols-mathchar0mo",u.default.mathchar0mo,{dotplus:"\u2214",ltimes:"\u22c9",smallsetminus:["\u2216",{variantForm:!0}],rtimes:"\u22ca",Cap:"\u22d2",doublecap:"\u22d2",leftthreetimes:"\u22cb",Cup:"\u22d3",doublecup:"\u22d3",rightthreetimes:"\u22cc",barwedge:"\u22bc",curlywedge:"\u22cf",veebar:"\u22bb",curlyvee:"\u22ce",doublebarwedge:"\u2a5e",boxminus:"\u229f",circleddash:"\u229d",boxtimes:"\u22a0",circledast:"\u229b",boxdot:"\u22a1",circledcirc:"\u229a",boxplus:"\u229e",centerdot:["\u22c5",{variantForm:!0}],divideontimes:"\u22c7",intercal:"\u22ba",leqq:"\u2266",geqq:"\u2267",leqslant:"\u2a7d",geqslant:"\u2a7e",eqslantless:"\u2a95",eqslantgtr:"\u2a96",lesssim:"\u2272",gtrsim:"\u2273",lessapprox:"\u2a85",gtrapprox:"\u2a86",approxeq:"\u224a",lessdot:"\u22d6",gtrdot:"\u22d7",lll:"\u22d8",llless:"\u22d8",ggg:"\u22d9",gggtr:"\u22d9",lessgtr:"\u2276",gtrless:"\u2277",lesseqgtr:"\u22da",gtreqless:"\u22db",lesseqqgtr:"\u2a8b",gtreqqless:"\u2a8c",doteqdot:"\u2251",Doteq:"\u2251",eqcirc:"\u2256",risingdotseq:"\u2253",circeq:"\u2257",fallingdotseq:"\u2252",triangleq:"\u225c",backsim:"\u223d",thicksim:["\u223c",{variantForm:!0}],backsimeq:"\u22cd",thickapprox:["\u2248",{variantForm:!0}],subseteqq:"\u2ac5",supseteqq:"\u2ac6",Subset:"\u22d0",Supset:"\u22d1",sqsubset:"\u228f",sqsupset:"\u2290",preccurlyeq:"\u227c",succcurlyeq:"\u227d",curlyeqprec:"\u22de",curlyeqsucc:"\u22df",precsim:"\u227e",succsim:"\u227f",precapprox:"\u2ab7",succapprox:"\u2ab8",vartriangleleft:"\u22b2",lhd:"\u22b2",vartriangleright:"\u22b3",rhd:"\u22b3",trianglelefteq:"\u22b4",unlhd:"\u22b4",trianglerighteq:"\u22b5",unrhd:"\u22b5",vDash:["\u22a8",{variantForm:!0}],Vdash:"\u22a9",Vvdash:"\u22aa",smallsmile:["\u2323",{variantForm:!0}],shortmid:["\u2223",{variantForm:!0}],smallfrown:["\u2322",{variantForm:!0}],shortparallel:["\u2225",{variantForm:!0}],bumpeq:"\u224f",between:"\u226c",Bumpeq:"\u224e",pitchfork:"\u22d4",varpropto:["\u221d",{variantForm:!0}],backepsilon:"\u220d",blacktriangleleft:"\u25c2",blacktriangleright:"\u25b8",therefore:"\u2234",because:"\u2235",eqsim:"\u2242",vartriangle:["\u25b3",{variantForm:!0}],Join:"\u22c8",nless:"\u226e",ngtr:"\u226f",nleq:"\u2270",ngeq:"\u2271",nleqslant:["\u2a87",{variantForm:!0}],ngeqslant:["\u2a88",{variantForm:!0}],nleqq:["\u2270",{variantForm:!0}],ngeqq:["\u2271",{variantForm:!0}],lneq:"\u2a87",gneq:"\u2a88",lneqq:"\u2268",gneqq:"\u2269",lvertneqq:["\u2268",{variantForm:!0}],gvertneqq:["\u2269",{variantForm:!0}],lnsim:"\u22e6",gnsim:"\u22e7",lnapprox:"\u2a89",gnapprox:"\u2a8a",nprec:"\u2280",nsucc:"\u2281",npreceq:["\u22e0",{variantForm:!0}],nsucceq:["\u22e1",{variantForm:!0}],precneqq:"\u2ab5",succneqq:"\u2ab6",precnsim:"\u22e8",succnsim:"\u22e9",precnapprox:"\u2ab9",succnapprox:"\u2aba",nsim:"\u2241",ncong:"\u2247",nshortmid:["\u2224",{variantForm:!0}],nshortparallel:["\u2226",{variantForm:!0}],nmid:"\u2224",nparallel:"\u2226",nvdash:"\u22ac",nvDash:"\u22ad",nVdash:"\u22ae",nVDash:"\u22af",ntriangleleft:"\u22ea",ntriangleright:"\u22eb",ntrianglelefteq:"\u22ec",ntrianglerighteq:"\u22ed",nsubseteq:"\u2288",nsupseteq:"\u2289",nsubseteqq:["\u2288",{variantForm:!0}],nsupseteqq:["\u2289",{variantForm:!0}],subsetneq:"\u228a",supsetneq:"\u228b",varsubsetneq:["\u228a",{variantForm:!0}],varsupsetneq:["\u228b",{variantForm:!0}],subsetneqq:"\u2acb",supsetneqq:"\u2acc",varsubsetneqq:["\u2acb",{variantForm:!0}],varsupsetneqq:["\u2acc",{variantForm:!0}],leftleftarrows:"\u21c7",rightrightarrows:"\u21c9",leftrightarrows:"\u21c6",rightleftarrows:"\u21c4",Lleftarrow:"\u21da",Rrightarrow:"\u21db",twoheadleftarrow:"\u219e",twoheadrightarrow:"\u21a0",leftarrowtail:"\u21a2",rightarrowtail:"\u21a3",looparrowleft:"\u21ab",looparrowright:"\u21ac",leftrightharpoons:"\u21cb",rightleftharpoons:["\u21cc",{variantForm:!0}],curvearrowleft:"\u21b6",curvearrowright:"\u21b7",circlearrowleft:"\u21ba",circlearrowright:"\u21bb",Lsh:"\u21b0",Rsh:"\u21b1",upuparrows:"\u21c8",downdownarrows:"\u21ca",upharpoonleft:"\u21bf",upharpoonright:"\u21be",downharpoonleft:"\u21c3",restriction:"\u21be",multimap:"\u22b8",downharpoonright:"\u21c2",leftrightsquigarrow:"\u21ad",rightsquigarrow:"\u21dd",leadsto:"\u21dd",dashrightarrow:"\u21e2",dashleftarrow:"\u21e0",nleftarrow:"\u219a",nrightarrow:"\u219b",nLeftarrow:"\u21cd",nRightarrow:"\u21cf",nleftrightarrow:"\u21ae",nLeftrightarrow:"\u21ce"}),new l.DelimiterMap("AMSsymbols-delimiter",u.default.delimiter,{"\\ulcorner":"\u231c","\\urcorner":"\u231d","\\llcorner":"\u231e","\\lrcorner":"\u231f"}),new l.CommandMap("AMSsymbols-macros",{implies:["Macro","\\;\\Longrightarrow\\;"],impliedby:["Macro","\\;\\Longleftarrow\\;"]},a.AmsMethods)},4387:function(t,e,r){var n=this&&this.__assign||function(){return n=Object.assign||function(t){for(var e,r=1,n=arguments.length;r0)&&!(n=i.next()).done;)s.push(n.value)}catch(t){o={error:t}}finally{try{n&&!n.done&&(r=i.return)&&r.call(i)}finally{if(o)throw o.error}}return s},i=this&&this.__importDefault||function(t){return t&&t.__esModule?t:{default:t}};Object.defineProperty(e,"__esModule",{value:!0}),e.NEW_OPS=e.AmsMethods=void 0;var s=i(r(1130)),a=i(r(5450)),l=i(r(1256)),c=r(8317),u=i(r(8417)),p=i(r(3971)),h=r(8803),f=i(r(7693)),d=r(9007);function m(t){if(!t||t.isInferred&&0===t.childNodes.length)return[null,null];if(t.isKind("msubsup")&&y(t))return[t,null];var e=l.default.getChildAt(t,0);return t.isInferred&&e&&y(e)?(t.childNodes.splice(0,1),[e,t]):[null,t]}function y(t){var e=t.childNodes[0];return e&&e.isKind("mi")&&""===e.getText()}e.AmsMethods={},e.AmsMethods.AmsEqnArray=function(t,e,r,n,o,i,a){var l=t.GetBrackets("\\begin{"+e.getName()+"}"),c=f.default.EqnArray(t,e,r,n,o,i,a);return s.default.setArrayAlign(c,l)},e.AmsMethods.AlignAt=function(t,r,n,o){var i,a,l=r.getName(),c="",u=[];if(o||(a=t.GetBrackets("\\begin{"+l+"}")),(i=t.GetArgument("\\begin{"+l+"}")).match(/[^0-9]/))throw new p.default("PositiveIntegerArg","Argument to %1 must me a positive integer","\\begin{"+l+"}");for(var h=parseInt(i,10);h>0;)c+="rl",u.push("0em 0em"),h--;var f=u.join(" ");if(o)return e.AmsMethods.EqnArray(t,r,n,o,c,f);var d=e.AmsMethods.EqnArray(t,r,n,o,c,f);return s.default.setArrayAlign(d,a)},e.AmsMethods.Multline=function(t,e,r){t.Push(e),s.default.checkEqnEnv(t);var n=t.itemFactory.create("multline",r,t.stack);return n.arraydef={displaystyle:!0,rowspacing:".5em",columnspacing:"100%",width:t.options.ams.multlineWidth,side:t.options.tagSide,minlabelspacing:t.options.tagIndent,framespacing:t.options.ams.multlineIndent+" 0",frame:"","data-width-includes-label":!0},n},e.AmsMethods.XalignAt=function(t,r,n,o){var i=t.GetArgument("\\begin{"+r.getName()+"}");if(i.match(/[^0-9]/))throw new p.default("PositiveIntegerArg","Argument to %1 must me a positive integer","\\begin{"+r.getName()+"}");var s=o?"crl":"rlc",a=o?"fit auto auto":"auto auto fit",l=e.AmsMethods.FlalignArray(t,r,n,o,!1,s,a,!0);return l.setProperty("xalignat",2*parseInt(i)),l},e.AmsMethods.FlalignArray=function(t,e,r,n,o,i,a,l){void 0===l&&(l=!1),t.Push(e),s.default.checkEqnEnv(t),i=i.split("").join(" ").replace(/r/g,"right").replace(/l/g,"left").replace(/c/g,"center");var c=t.itemFactory.create("flalign",e.getName(),r,n,o,t.stack);return c.arraydef={width:"100%",displaystyle:!0,columnalign:i,columnspacing:"0em",columnwidth:a,rowspacing:"3pt",side:t.options.tagSide,minlabelspacing:l?"0":t.options.tagIndent,"data-width-includes-label":!0},c.setProperty("zeroWidthLabel",l),c},e.NEW_OPS="ams-declare-ops",e.AmsMethods.HandleDeclareOp=function(t,r){var n=t.GetStar()?"*":"",o=s.default.trimSpaces(t.GetArgument(r));"\\"===o.charAt(0)&&(o=o.substr(1));var i=t.GetArgument(r);t.configuration.handlers.retrieve(e.NEW_OPS).add(o,new h.Macro(o,e.AmsMethods.Macro,["\\operatorname".concat(n,"{").concat(i,"}")]))},e.AmsMethods.HandleOperatorName=function(t,e){var r=t.GetStar(),o=s.default.trimSpaces(t.GetArgument(e)),i=new u.default(o,n(n({},t.stack.env),{font:c.TexConstant.Variant.NORMAL,multiLetterIdentifiers:/^[-*a-z]+/i,operatorLetters:!0}),t.configuration).mml();if(i.isKind("mi")||(i=t.create("node","TeXAtom",[i])),l.default.setProperties(i,{movesupsub:r,movablelimits:!0,texClass:d.TEXCLASS.OP}),!r){var a=t.GetNext(),p=t.i;"\\"===a&&++t.i&&"limits"!==t.GetCS()&&(t.i=p)}t.Push(i)},e.AmsMethods.SideSet=function(t,e){var r=o(m(t.ParseArg(e)),2),n=r[0],i=r[1],a=o(m(t.ParseArg(e)),2),c=a[0],u=a[1],p=t.ParseArg(e),h=p;n&&(i?n.replaceChild(t.create("node","mphantom",[t.create("node","mpadded",[s.default.copyNode(p,t)],{width:0})]),l.default.getChildAt(n,0)):(h=t.create("node","mmultiscripts",[p]),c&&l.default.appendChildren(h,[l.default.getChildAt(c,1)||t.create("node","none"),l.default.getChildAt(c,2)||t.create("node","none")]),l.default.setProperty(h,"scriptalign","left"),l.default.appendChildren(h,[t.create("node","mprescripts"),l.default.getChildAt(n,1)||t.create("node","none"),l.default.getChildAt(n,2)||t.create("node","none")]))),c&&h===p&&(c.replaceChild(p,l.default.getChildAt(c,0)),h=c);var f=t.create("node","TeXAtom",[],{texClass:d.TEXCLASS.OP,movesupsub:!0,movablelimits:!0});i&&(n&&f.appendChild(n),f.appendChild(i)),f.appendChild(h),u&&f.appendChild(u),t.Push(f)},e.AmsMethods.operatorLetter=function(t,e){return!!t.stack.env.operatorLetters&&a.default.variable(t,e)},e.AmsMethods.MultiIntegral=function(t,e,r){var n=t.GetNext();if("\\"===n){var o=t.i;n=t.GetArgument(e),t.i=o,"\\limits"===n&&(r="\\idotsint"===e?"\\!\\!\\mathop{\\,\\,"+r+"}":"\\!\\!\\!\\mathop{\\,\\,\\,"+r+"}")}t.string=r+" "+t.string.slice(t.i),t.i=0},e.AmsMethods.xArrow=function(t,e,r,n,o){var i={width:"+"+s.default.Em((n+o)/18),lspace:s.default.Em(n/18)},a=t.GetBrackets(e),c=t.ParseArg(e),p=t.create("node","mspace",[],{depth:".25em"}),h=t.create("token","mo",{stretchy:!0,texClass:d.TEXCLASS.REL},String.fromCodePoint(r));h=t.create("node","mstyle",[h],{scriptlevel:0});var f=t.create("node","munderover",[h]),m=t.create("node","mpadded",[c,p],i);if(l.default.setAttribute(m,"voffset","-.2em"),l.default.setAttribute(m,"height","-.2em"),l.default.setChild(f,f.over,m),a){var y=new u.default(a,t.stack.env,t.configuration).mml(),g=t.create("node","mspace",[],{height:".75em"});m=t.create("node","mpadded",[y,g],i),l.default.setAttribute(m,"voffset",".15em"),l.default.setAttribute(m,"depth","-.15em"),l.default.setChild(f,f.under,m)}l.default.setProperty(f,"subsupOK",!0),t.Push(f)},e.AmsMethods.HandleShove=function(t,e,r){var n=t.stack.Top();if("multline"!==n.kind)throw new p.default("CommandOnlyAllowedInEnv","%1 only allowed in %2 environment",t.currentCS,"multline");if(n.Size())throw new p.default("CommandAtTheBeginingOfLine","%1 must come at the beginning of the line",t.currentCS);n.setProperty("shove",r)},e.AmsMethods.CFrac=function(t,e){var r=s.default.trimSpaces(t.GetBrackets(e,"")),n=t.GetArgument(e),o=t.GetArgument(e),i={l:c.TexConstant.Align.LEFT,r:c.TexConstant.Align.RIGHT,"":""},a=new u.default("\\strut\\textstyle{"+n+"}",t.stack.env,t.configuration).mml(),h=new u.default("\\strut\\textstyle{"+o+"}",t.stack.env,t.configuration).mml(),f=t.create("node","mfrac",[a,h]);if(null==(r=i[r]))throw new p.default("IllegalAlign","Illegal alignment specified in %1",t.currentCS);r&&l.default.setProperties(f,{numalign:r,denomalign:r}),t.Push(f)},e.AmsMethods.Genfrac=function(t,e,r,n,o,i){null==r&&(r=t.GetDelimiterArg(e)),null==n&&(n=t.GetDelimiterArg(e)),null==o&&(o=t.GetArgument(e)),null==i&&(i=s.default.trimSpaces(t.GetArgument(e)));var a=t.ParseArg(e),c=t.ParseArg(e),u=t.create("node","mfrac",[a,c]);if(""!==o&&l.default.setAttribute(u,"linethickness",o),(r||n)&&(l.default.setProperty(u,"withDelims",!0),u=s.default.fixedFence(t.configuration,r,u,n)),""!==i){var h=parseInt(i,10),f=["D","T","S","SS"][h];if(null==f)throw new p.default("BadMathStyleFor","Bad math style for %1",t.currentCS);u=t.create("node","mstyle",[u]),"D"===f?l.default.setProperties(u,{displaystyle:!0,scriptlevel:0}):l.default.setProperties(u,{displaystyle:!1,scriptlevel:h-1})}t.Push(u)},e.AmsMethods.HandleTag=function(t,e){if(!t.tags.currentTag.taggable&&t.tags.env)throw new p.default("CommandNotAllowedInEnv","%1 not allowed in %2 environment",t.currentCS,t.tags.env);if(t.tags.currentTag.tag)throw new p.default("MultipleCommand","Multiple %1",t.currentCS);var r=t.GetStar(),n=s.default.trimSpaces(t.GetArgument(e));t.tags.tag(n,r)},e.AmsMethods.HandleNoTag=f.default.HandleNoTag,e.AmsMethods.HandleRef=f.default.HandleRef,e.AmsMethods.Macro=f.default.Macro,e.AmsMethods.Accent=f.default.Accent,e.AmsMethods.Tilde=f.default.Tilde,e.AmsMethods.Array=f.default.Array,e.AmsMethods.Spacer=f.default.Spacer,e.AmsMethods.NamedOp=f.default.NamedOp,e.AmsMethods.EqnArray=f.default.EqnArray,e.AmsMethods.Equation=f.default.Equation},1275:function(t,e,r){var n=this&&this.__read||function(t,e){var r="function"==typeof Symbol&&t[Symbol.iterator];if(!r)return t;var n,o,i=r.call(t),s=[];try{for(;(void 0===e||e-- >0)&&!(n=i.next()).done;)s.push(n.value)}catch(t){o={error:t}}finally{try{n&&!n.done&&(r=i.return)&&r.call(i)}finally{if(o)throw o.error}}return s},o=this&&this.__values||function(t){var e="function"==typeof Symbol&&Symbol.iterator,r=e&&t[e],n=0;if(r)return r.call(t);if(t&&"number"==typeof t.length)return{next:function(){return t&&n>=t.length&&(t=void 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    ","
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    ","
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d.Parser([["contextMenu",u.MJContextMenu.fromJson.bind(u.MJContextMenu)]]);this.menu=e.parse({type:"contextMenu",id:"MathJax_Menu",pool:[this.variable("texHints"),this.variable("semantics"),this.variable("zoom"),this.variable("zscale"),this.variable("renderer",(function(e){return t.setRenderer(e)})),this.variable("alt"),this.variable("cmd"),this.variable("ctrl"),this.variable("shift"),this.variable("scale",(function(e){return t.setScale(e)})),this.variable("explorer",(function(e){return t.setExplorer(e)})),this.a11yVar("highlight"),this.a11yVar("backgroundColor"),this.a11yVar("backgroundOpacity"),this.a11yVar("foregroundColor"),this.a11yVar("foregroundOpacity"),this.a11yVar("speech"),this.a11yVar("subtitles"),this.a11yVar("braille"),this.a11yVar("viewBraille"),this.a11yVar("locale",(function(t){return g.default.setupEngine({locale:t})})),this.a11yVar("speechRules",(function(e){var r=n(e.split("-"),2),o=r[0],i=r[1];t.document.options.sre.domain=o,t.document.options.sre.style=i})),this.a11yVar("magnification"),this.a11yVar("magnify"),this.a11yVar("treeColoring"),this.a11yVar("infoType"),this.a11yVar("infoRole"),this.a11yVar("infoPrefix"),this.variable("autocollapse"),this.variable("collapsible",(function(e){return t.setCollapsible(e)})),this.variable("inTabOrder",(function(e){return t.setTabOrder(e)})),this.variable("assistiveMml",(function(e){return t.setAssistiveMml(e)}))],items:[this.submenu("Show","Show Math As",[this.command("MathMLcode","MathML Code",(function(){return t.mathmlCode.post()})),this.command("Original","Original Form",(function(){return t.originalText.post()})),this.submenu("Annotation","Annotation")]),this.submenu("Copy","Copy to Clipboard",[this.command("MathMLcode","MathML Code",(function(){return t.copyMathML()})),this.command("Original","Original Form",(function(){return t.copyOriginal()})),this.submenu("Annotation","Annotation")]),this.rule(),this.submenu("Settings","Math Settings",[this.submenu("Renderer","Math Renderer",this.radioGroup("renderer",[["CHTML"],["SVG"]])),this.rule(),this.submenu("ZoomTrigger","Zoom Trigger",[this.command("ZoomNow","Zoom Once Now",(function(){return t.zoom(null,"",t.menu.mathItem)})),this.rule(),this.radioGroup("zoom",[["Click"],["DoubleClick","Double-Click"],["NoZoom","No Zoom"]]),this.rule(),this.label("TriggerRequires","Trigger Requires:"),this.checkbox(v?"Option":"Alt",v?"Option":"Alt","alt"),this.checkbox("Command","Command","cmd",{hidden:!v}),this.checkbox("Control","Control","ctrl",{hiddne:v}),this.checkbox("Shift","Shift","shift")]),this.submenu("ZoomFactor","Zoom Factor",this.radioGroup("zscale",[["150%"],["175%"],["200%"],["250%"],["300%"],["400%"]])),this.rule(),this.command("Scale","Scale All Math...",(function(){return t.scaleAllMath()})),this.rule(),this.checkbox("texHints","Add TeX hints to 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Rules",this.radioGroup("speechRules",[["chromevox-default","Standard"],["chromevox-alternative","Alternative"]]))]),this.submenu("Highlight","Highlight",[this.submenu("Background","Background",this.radioGroup("backgroundColor",[["Blue"],["Red"],["Green"],["Yellow"],["Cyan"],["Magenta"],["White"],["Black"]])),{type:"slider",variable:"backgroundOpacity",content:" "},this.submenu("Foreground","Foreground",this.radioGroup("foregroundColor",[["Black"],["White"],["Magenta"],["Cyan"],["Yellow"],["Green"],["Red"],["Blue"]])),{type:"slider",variable:"foregroundOpacity",content:" "},this.rule(),this.radioGroup("highlight",[["None"],["Hover"],["Flame"]]),this.rule(),this.checkbox("TreeColoring","Tree Coloring","treeColoring")]),this.submenu("Magnification","Magnification",[this.radioGroup("magnification",[["None"],["Keyboard"],["Mouse"]]),this.rule(),this.radioGroup("magnify",[["200%"],["300%"],["400%"],["500%"]])]),this.submenu("Semantic Info","Semantic Info",[this.checkbox("Type","Type","infoType"),this.checkbox("Role","Role","infoRole"),this.checkbox("Prefix","Prefix","infoPrefix")],!0),this.rule(),this.checkbox("Collapsible","Collapsible Math","collapsible"),this.checkbox("AutoCollapse","Auto Collapse","autocollapse",{disabled:!0}),this.rule(),this.checkbox("InTabOrder","Include in Tab Order","inTabOrder"),this.checkbox("AssistiveMml","Include Hidden MathML","assistiveMml")]),this.submenu("Language","Language"),this.rule(),this.command("About","About MathJax",(function(){return t.about.post()})),this.command("Help","MathJax Help",(function(){return t.help.post()}))]});var r=this.menu;this.about.attachMenu(r),this.help.attachMenu(r),this.originalText.attachMenu(r),this.annotationText.attachMenu(r),this.mathmlCode.attachMenu(r),this.zoomBox.attachMenu(r),this.checkLoadableItems(),this.enableExplorerItems(this.settings.explorer),r.showAnnotation=this.annotationText,r.copyAnnotation=this.copyAnnotation.bind(this),r.annotationTypes=this.options.annotationTypes,y.CssStyles.addInfoStyles(this.document.document),y.CssStyles.addMenuStyles(this.document.document)},t.prototype.checkLoadableItems=function(){var t,e;if(b&&b._&&b.loader&&b.startup)!this.settings.collapsible||b._.a11y&&b._.a11y.complexity||this.loadA11y("complexity"),!this.settings.explorer||b._.a11y&&b._.a11y.explorer||this.loadA11y("explorer"),!this.settings.assistiveMml||b._.a11y&&b._.a11y["assistive-mml"]||this.loadA11y("assistive-mml");else{var r=this.menu;try{for(var n=o(Object.keys(this.jax)),i=n.next();!i.done;i=n.next()){var 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i=o(Object.keys(this.settings)),s=i.next();!s.done;s=i.next()){var a=s.value;this.settings[a]!==this.defaultSettings[a]&&(n[a]=this.settings[a])}}catch(t){e={error:t}}finally{try{s&&!s.done&&(r=i.return)&&r.call(i)}finally{if(e)throw e.error}}try{Object.keys(n).length?localStorage.setItem(t.MENU_STORAGE,JSON.stringify(n)):localStorage.removeItem(t.MENU_STORAGE)}catch(t){console.log("MathJax localStorage error: "+t.message)}},t.prototype.setA11y=function(t){b._.a11y&&b._.a11y.explorer&&b._.a11y.explorer_ts.setA11yOptions(this.document,t)},t.prototype.getA11y=function(t){if(b._.a11y&&b._.a11y.explorer)return void 0!==this.document.options.a11y[t]?this.document.options.a11y[t]:this.document.options.sre[t]},t.prototype.applySettings=function(){this.setTabOrder(this.settings.inTabOrder),this.document.options.enableAssistiveMml=this.settings.assistiveMml,this.document.outputJax.options.scale=parseFloat(this.settings.scale),this.settings.renderer!==this.defaultSettings.renderer&&this.setRenderer(this.settings.renderer)},t.prototype.setScale=function(t){this.document.outputJax.options.scale=parseFloat(t),this.document.rerender()},t.prototype.setRenderer=function(t){var e=this;if(this.jax[t])this.setOutputJax(t);else{var r=t.toLowerCase();this.loadComponent("output/"+r,(function(){var n=b.startup;r in n.constructors&&(n.useOutput(r,!0),n.output=n.getOutputJax(),e.jax[t]=n.output,e.setOutputJax(t))}))}},t.prototype.setOutputJax=function(t){this.jax[t].setAdaptor(this.document.adaptor),this.document.outputJax=this.jax[t],this.rerender()},t.prototype.setTabOrder=function(t){this.menu.store.inTaborder(t)},t.prototype.setAssistiveMml=function(t){this.document.options.enableAssistiveMml=t,!t||b._.a11y&&b._.a11y["assistive-mml"]?this.rerender():this.loadA11y("assistive-mml")},t.prototype.setExplorer=function(t){this.enableExplorerItems(t),this.document.options.enableExplorer=t,!t||b._.a11y&&b._.a11y.explorer?this.rerender(this.settings.collapsible?a.STATE.RERENDER:a.STATE.COMPILED):this.loadA11y("explorer")},t.prototype.setCollapsible=function(t){this.document.options.enableComplexity=t,!t||b._.a11y&&b._.a11y.complexity?this.rerender(a.STATE.COMPILED):this.loadA11y("complexity")},t.prototype.scaleAllMath=function(){var t=(100*parseFloat(this.settings.scale)).toFixed(1).replace(/.0$/,""),e=prompt("Scale all mathematics (compared to surrounding text) by",t+"%");if(e)if(e.match(/^\s*\d+(\.\d*)?\s*%?\s*$/)){var r=parseFloat(e)/100;r?this.menu.pool.lookup("scale").setValue(String(r)):alert("The scale should not be zero")}else alert("The scale should be a percentage (e.g., 120%)")},t.prototype.resetDefaults=function(){var e,r;t.loading++;var n=this.menu.pool,i=this.defaultSettings;try{for(var s=o(Object.keys(this.settings)),l=s.next();!l.done;l=s.next()){var c=l.value,u=n.lookup(c);if(u){u.setValue(i[c]);var p=u.items[0];p&&p.executeCallbacks_()}else this.settings[c]=i[c]}}catch(t){e={error:t}}finally{try{l&&!l.done&&(r=s.return)&&r.call(s)}finally{if(e)throw e.error}}t.loading--,this.rerender(a.STATE.COMPILED)},t.prototype.checkComponent=function(e){var r=t.loadingPromises.get(e);r&&s.mathjax.retryAfter(r)},t.prototype.loadComponent=function(e,r){if(!t.loadingPromises.has(e)){var 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n;Object.assign(l,a),this.document.math.push(l)}}catch(t){e={error:t}}finally{try{s&&!s.done&&(r=i.return)&&r.call(i)}finally{if(e)throw e.error}}},t.prototype.formatSource=function(t){return t.trim().replace(/&/g,"&").replace(//g,">")},t.prototype.toMML=function(t){return this.MmlVisitor.visitTree(t.root,t,{texHints:this.settings.texHints,semantics:this.settings.semantics&&"MathML"!==t.inputJax.name})},t.prototype.zoom=function(t,e,r){t&&!this.isZoomEvent(t,e)||(this.menu.mathItem=r,t&&this.menu.post(t),this.zoomBox.post())},t.prototype.isZoomEvent=function(t,e){return this.settings.zoom===e&&(!this.settings.alt||t.altKey)&&(!this.settings.ctrl||t.ctrlKey)&&(!this.settings.cmd||t.metaKey)&&(!this.settings.shift||t.shiftKey)},t.prototype.rerender=function(e){void 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e.menu.mathItem=t}),!0),r.addEventListener("keydown",(function(){return e.menu.mathItem=t}),!0),r.addEventListener("click",(function(r){return e.zoom(r,"Click",t)}),!0),r.addEventListener("dblclick",(function(r){return e.zoom(r,"DoubleClick",t)}),!0),this.menu.store.insert(r)},t.prototype.clear=function(){this.menu.store.clear()},t.prototype.variable=function(t,e){var r=this;return{name:t,getter:function(){return r.settings[t]},setter:function(n){r.settings[t]=n,e&&e(n),r.saveUserSettings()}}},t.prototype.a11yVar=function(t,e){var r=this;return{name:t,getter:function(){return r.getA11y(t)},setter:function(n){r.settings[t]=n;var o={};o[t]=n,r.setA11y(o),e&&e(n),r.saveUserSettings()}}},t.prototype.submenu=function(t,e,r,n){var i,s;void 0===r&&(r=[]),void 0===n&&(n=!1);var a=[];try{for(var l=o(r),c=l.next();!c.done;c=l.next()){var u=c.value;Array.isArray(u)?a=a.concat(u):a.push(u)}}catch(t){i={error:t}}finally{try{c&&!c.done&&(s=l.return)&&s.call(l)}finally{if(i)throw 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t=this.html;t.classList.remove(l.HtmlClasses.MENUDISABLED),t.removeAttribute("aria-disabled")},e.prototype.executeCallbacks_=function(){var t,e;try{for(var r=i(this.callbacks),n=r.next();!n.done;n=r.next()){var o=n.value;try{o(this)}catch(t){a.MenuUtil.error(t,"Callback for menu entry "+this.id+" failed.")}}}catch(e){t={error:e}}finally{try{n&&!n.done&&(e=r.return)&&e.call(r)}finally{if(t)throw t.error}}},e}(s.AbstractEntry);e.AbstractItem=c},1484:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)}),i=this&&this.__values||function(t){var e="function"==typeof Symbol&&Symbol.iterator,r=e&&t[e],n=0;if(r)return r.call(t);if(t&&"number"==typeof t.length)return{next:function(){return 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e=this._focused;this._focused=t,e&&e.unfocus()}},enumerable:!1,configurable:!0}),e.prototype.up=function(t){var e=this.items.filter((function(t){return t instanceof a.AbstractItem&&!t.isHidden()}));if(0!==e.length)if(this.focused){var r=e.indexOf(this.focused);-1!==r&&e[r=r?--r:e.length-1].focus()}else e[e.length-1].focus()},e.prototype.down=function(t){var e=this.items.filter((function(t){return t instanceof a.AbstractItem&&!t.isHidden()}));if(0!==e.length)if(this.focused){var r=e.indexOf(this.focused);-1!==r&&e[r=++r===e.length?0:r].focus()}else e[0].focus()},e.prototype.generateHtml=function(){t.prototype.generateHtml.call(this),this.generateMenu()},e.prototype.generateMenu=function(){var t,e,r=this.html;r.classList.add(l.HtmlClasses.MENU);try{for(var n=i(this.items),o=n.next();!o.done;o=n.next()){var s=o.value;if(s.isHidden()){var a=s.html;a.parentNode&&a.parentNode.removeChild(a)}else r.appendChild(s.html)}}catch(e){t={error:e}}finally{try{o&&!o.done&&(e=n.return)&&e.call(n)}finally{if(t)throw t.error}}},e.prototype.post=function(e,r){this.variablePool.update(),t.prototype.post.call(this,e,r)},e.prototype.unpostSubmenus=function(){var t,e,r=this.items.filter((function(t){return t instanceof c.Submenu}));try{for(var n=i(r),o=n.next();!o.done;o=n.next()){var s=o.value;s.submenu.unpost(),s!==this.focused&&s.unfocus()}}catch(e){t={error:e}}finally{try{o&&!o.done&&(e=n.return)&&e.call(n)}finally{if(t)throw t.error}}},e.prototype.unpost=function(){t.prototype.unpost.call(this),this.unpostSubmenus(),this.focused=null},e.prototype.find=function(t){var e,r;try{for(var n=i(this.items),o=n.next();!o.done;o=n.next()){var s=o.value;if("rule"!==s.type){if(s.id===t)return s;if("submenu"===s.type){var a=s.submenu.find(t);if(a)return a}}}}catch(t){e={error:t}}finally{try{o&&!o.done&&(r=n.return)&&r.call(n)}finally{if(e)throw e.error}}return 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n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)});Object.defineProperty(e,"__esModule",{value:!0}),e.ContextMenu=void 0;var i=r(1484),s=r(2165),a=r(1932),l=r(2358),c=function(t){function e(e){var r=t.call(this)||this;return r.factory=e,r.id="",r.moving=!1,r._store=new a.MenuStore(r),r.widgets=[],r.variablePool=new l.VariablePool,r}return o(e,t),e.fromJson=function(t,e){var r=e.pool,n=e.items,o=e.id,i=void 0===o?"":o,s=new this(t);s.id=i;var a=t.get("variable");r.forEach((function(e){return a(t,e,s.pool)}));var l=t.get("items")(t,n,s);return 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e=this.store;this.moving||e.insertTaborder(),e.active.focus()}},e.prototype.left=function(t){this.move_(this.store.previous())},e.prototype.right=function(t){this.move_(this.store.next())},Object.defineProperty(e.prototype,"frame",{get:function(){return this._frame},enumerable:!1,configurable:!0}),Object.defineProperty(e.prototype,"store",{get:function(){return this._store},enumerable:!1,configurable:!0}),e.prototype.post=function(e,r){if(void 0!==r)return this.moving||this.store.removeTaborder(),void t.prototype.post.call(this,e,r);var n,o,i,s=e;if(s instanceof Event?(n=s.target,this.stop(s)):n=s,s instanceof MouseEvent&&(o=s.pageX,i=s.pageY,o||i||!s.clientX||(o=s.clientX+document.body.scrollLeft+document.documentElement.scrollLeft,i=s.clientY+document.body.scrollTop+document.documentElement.scrollTop)),!o&&!i&&n){var a=window.pageXOffset||document.documentElement.scrollLeft,l=window.pageYOffset||document.documentElement.scrollTop,c=n.getBoundingClientRect();o=(c.right+c.left)/2+a,i=(c.bottom+c.top)/2+l}this.store.active=n,this.anchor=this.store.active;var u=this.html;o+u.offsetWidth>document.body.offsetWidth-5&&(o=document.body.offsetWidth-u.offsetWidth-5),this.post(o,i)},e.prototype.registerWidget=function(t){this.widgets.push(t)},e.prototype.unregisterWidget=function(t){var e=this.widgets.indexOf(t);e>-1&&this.widgets.splice(e,1),0===this.widgets.length&&this.unpost()},e.prototype.unpostWidgets=function(){this.widgets.forEach((function(t){return t.unpost()}))},e.prototype.toJson=function(){return{type:""}},e.prototype.move_=function(t){this.anchor&&t!==this.anchor&&(this.moving=!0,this.unpost(),this.post(t),this.moving=!1)},e}(i.AbstractMenu);e.ContextMenu=c},7309:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.CssStyles=void 0;var n=r(2165);!function(t){function e(t){return"."+(n.HtmlClasses[t]||t)}var r={};r[e("INFOCLOSE")]="{  top:.2em; right:.2em;}",r[e("INFOCONTENT")]="{  overflow:auto; text-align:left; font-size:80%;  padding:.4em .6em; border:1px inset; margin:1em 0px;  max-height:20em; max-width:30em; background-color:#EEEEEE;  white-space:normal;}",r[e("INFO")+e("MOUSEPOST")]="{outline:none;}",r[e("INFO")]='{  position:fixed; left:50%; width:auto; text-align:center;  border:3px outset; padding:1em 2em; background-color:#DDDDDD;  color:black;  cursor:default; font-family:message-box; font-size:120%;  font-style:normal; text-indent:0; text-transform:none;  line-height:normal; letter-spacing:normal; word-spacing:normal;  word-wrap:normal; white-space:nowrap; float:none; z-index:201;  border-radius: 15px;                     /* Opera 10.5 and IE9 */  -webkit-border-radius:15px;               /* Safari and Chrome */  -moz-border-radius:15px;                  /* Firefox */  -khtml-border-radius:15px;                /* Konqueror */  box-shadow:0px 10px 20px #808080;         /* Opera 10.5 and IE9 */  -webkit-box-shadow:0px 10px 20px #808080; /* Safari 3 & Chrome */  -moz-box-shadow:0px 10px 20px #808080;    /* Forefox 3.5 */  -khtml-box-shadow:0px 10px 20px #808080;  /* Konqueror */  filter:progid:DXImageTransform.Microsoft.dropshadow(OffX=2, OffY=2, Color="gray", Positive="true"); /* IE */}';var o={};o[e("MENU")]="{  position:absolute;  background-color:white;  color:black;  width:auto; padding:5px 0px;  border:1px solid #CCCCCC; margin:0; cursor:default;  font: menu; text-align:left; text-indent:0; text-transform:none;  line-height:normal; letter-spacing:normal; word-spacing:normal;  word-wrap:normal; white-space:nowrap; float:none; z-index:201;  border-radius: 5px;                     /* Opera 10.5 and IE9 */  -webkit-border-radius: 5px;             /* Safari and Chrome */  -moz-border-radius: 5px;                /* Firefox */  -khtml-border-radius: 5px;              /* Konqueror */  box-shadow:0px 10px 20px #808080;         /* Opera 10.5 and IE9 */  -webkit-box-shadow:0px 10px 20px #808080; /* Safari 3 & Chrome */  -moz-box-shadow:0px 10px 20px #808080;    /* Forefox 3.5 */  -khtml-box-shadow:0px 10px 20px #808080;  /* Konqueror */}",o[e("MENUITEM")]="{  padding: 1px 2em;  background:transparent;}",o[e("MENUARROW")]="{  position:absolute; right:.5em; padding-top:.25em; color:#666666;  font-family: null; font-size: .75em}",o[e("MENUACTIVE")+" "+e("MENUARROW")]="{color:white}",o[e("MENUARROW")+e("RTL")]="{left:.5em; right:auto}",o[e("MENUCHECK")]="{  position:absolute; left:.7em;  font-family: null}",o[e("MENUCHECK")+e("RTL")]="{ right:.7em; left:auto }",o[e("MENURADIOCHECK")]="{  position:absolute; left: .7em;}",o[e("MENURADIOCHECK")+e("RTL")]="{  right: .7em; left:auto}",o[e("MENUINPUTBOX")]="{  padding-left: 1em; right:.5em; color:#666666;  font-family: null;}",o[e("MENUINPUTBOX")+e("RTL")]="{  left: .1em;}",o[e("MENUCOMBOBOX")]="{  left:.1em; padding-bottom:.5em;}",o[e("MENUSLIDER")]="{ 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background-color:#FFFFFF;}",o[e("SELECTIONDIVIDER")]="{  clear: both; border-top: 2px solid #000000;}",o[e("MENU")+" "+e("MENUCLOSE")]="{  top:-10px; left:-10px}";var i={};i[e("MENUCLOSE")]='{  position:absolute;  cursor:pointer;  display:inline-block;  border:2px solid #AAA;  border-radius:18px;  -webkit-border-radius: 18px;             /* Safari and Chrome */  -moz-border-radius: 18px;                /* Firefox */  -khtml-border-radius: 18px;              /* Konqueror */  font-family: "Courier New", Courier;  font-size:24px;  color:#F0F0F0}',i[e("MENUCLOSE")+" span"]="{  display:block; background-color:#AAA; border:1.5px solid;  border-radius:18px;  -webkit-border-radius: 18px;             /* Safari and Chrome */  -moz-border-radius: 18px;                /* Firefox */  -khtml-border-radius: 18px;              /* Konqueror */  line-height:0;  padding:8px 0 6px     /* may need to be browser-specific */}",i[e("MENUCLOSE")+":hover"]="{  color:white!important;  border:2px solid #CCC!important}",i[e("MENUCLOSE")+":hover span"]="{  background-color:#CCC!important}",i[e("MENUCLOSE")+":hover:focus"]="{  outline:none}";var s=!1,a=!1,l=!1;function c(t){l||(u(i,t),l=!0)}function u(t,e){var r=e||document,n=r.createElement("style");n.type="text/css";var o="";for(var i in t)o+=i,o+=" ",o+=t[i],o+="\n";n.innerHTML=o,r.head.appendChild(n)}t.addMenuStyles=function(t){a||(u(o,t),a=!0,c(t))},t.addInfoStyles=function(t){s||(u(r,t),s=!0,c(t))}}(e.CssStyles||(e.CssStyles={}))},2165:function(t,e){Object.defineProperty(e,"__esModule",{value:!0}),e.HtmlAttrs=e.HtmlClasses=void 0;function r(t){return"CtxtMenu_"+t}function n(t){return r(t)}function o(t){return r(t)}e.HtmlClasses={ATTACHED:n("Attached"),CONTEXTMENU:n("ContextMenu"),MENU:n("Menu"),MENUARROW:n("MenuArrow"),MENUACTIVE:n("MenuActive"),MENUCHECK:n("MenuCheck"),MENUCLOSE:n("MenuClose"),MENUCOMBOBOX:n("MenuComboBox"),MENUDISABLED:n("MenuDisabled"),MENUFRAME:n("MenuFrame"),MENUITEM:n("MenuItem"),MENULABEL:n("MenuLabel"),MENURADIOCHECK:n("MenuRadioCheck"),MENUINPUTBOX:n("MenuInputBox"),MENURULE:n("MenuRule"),MENUSLIDER:n("MenuSlider"),MOUSEPOST:n("MousePost"),RTL:n("RTL"),INFO:n("Info"),INFOCLOSE:n("InfoClose"),INFOCONTENT:n("InfoContent"),INFOSIGNATURE:n("InfoSignature"),INFOTITLE:n("InfoTitle"),SLIDERVALUE:n("SliderValue"),SLIDERBAR:n("SliderBar"),SELECTION:n("Selection"),SELECTIONBOX:n("SelectionBox"),SELECTIONMENU:n("SelectionMenu"),SELECTIONDIVIDER:n("SelectionDivider"),SELECTIONITEM:n("SelectionItem")},e.HtmlAttrs={COUNTER:o("Counter"),KEYDOWNFUNC:o("keydownFunc"),CONTEXTMENUFUNC:o("contextmenuFunc"),OLDTAB:o("Oldtabindex"),TOUCHFUNC:o("TouchFunc")}},4922:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)});Object.defineProperty(e,"__esModule",{value:!0}),e.Info=void 0;var i=r(5179),s=r(2165),a=function(t){function e(e,r,n){var o=t.call(this)||this;return o.title=e,o.signature=n,o.className=s.HtmlClasses.INFO,o.role="dialog",o.contentDiv=o.generateContent(),o.close=o.generateClose(),o.content=r||function(){return""},o}return o(e,t),e.prototype.attachMenu=function(t){this.menu=t},e.prototype.generateHtml=function(){t.prototype.generateHtml.call(this);var e=this.html;e.appendChild(this.generateTitle()),e.appendChild(this.contentDiv),e.appendChild(this.generateSignature()),e.appendChild(this.close.html),e.setAttribute("tabindex","0")},e.prototype.post=function(){t.prototype.post.call(this);var e=document.documentElement,r=this.html,n=window.innerHeight||e.clientHeight||e.scrollHeight||0,o=Math.floor(-r.offsetWidth/2),i=Math.floor((n-r.offsetHeight)/3);r.setAttribute("style","margin-left: "+o+"px; top: "+i+"px;"),window.event instanceof MouseEvent&&r.classList.add(s.HtmlClasses.MOUSEPOST),r.focus()},e.prototype.display=function(){this.menu.registerWidget(this),this.contentDiv.innerHTML=this.content();var t=this.menu.html;t.parentNode&&t.parentNode.removeChild(t),this.menu.frame.appendChild(this.html)},e.prototype.click=function(t){},e.prototype.keydown=function(e){this.bubbleKey(),t.prototype.keydown.call(this,e)},e.prototype.escape=function(t){this.unpost()},e.prototype.unpost=function(){t.prototype.unpost.call(this),this.html.classList.remove(s.HtmlClasses.MOUSEPOST),this.menu.unregisterWidget(this)},e.prototype.generateClose=function(){var t=new i.CloseButton(this),e=t.html;return e.classList.add(s.HtmlClasses.INFOCLOSE),e.setAttribute("aria-label","Close Dialog Box"),t},e.prototype.generateTitle=function(){var t=document.createElement("span");return t.innerHTML=this.title,t.classList.add(s.HtmlClasses.INFOTITLE),t},e.prototype.generateContent=function(){var t=document.createElement("div");return t.classList.add(s.HtmlClasses.INFOCONTENT),t.setAttribute("tabindex","0"),t},e.prototype.generateSignature=function(){var t=document.createElement("span");return t.innerHTML=this.signature,t.classList.add(s.HtmlClasses.INFOSIGNATURE),t},e.prototype.toJson=function(){return{type:""}},e}(r(8372).AbstractPostable);e.Info=a},1409:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)});Object.defineProperty(e,"__esModule",{value:!0}),e.Checkbox=void 0;var i=r(6765),s=r(2556),a=r(2165),l=function(t){function e(e,r,n,o){var i=t.call(this,e,"checkbox",r,o)||this;return i.role="menuitemcheckbox",i.variable=e.pool.lookup(n),i.register(),i}return o(e,t),e.fromJson=function(t,e,r){return new this(r,e.content,e.variable,e.id)},e.prototype.executeAction=function(){this.variable.setValue(!this.variable.getValue()),s.MenuUtil.close(this)},e.prototype.generateSpan=function(){this.span=document.createElement("span"),this.span.textContent="\u2713",this.span.classList.add(a.HtmlClasses.MENUCHECK)},e.prototype.updateAria=function(){this.html.setAttribute("aria-checked",this.variable.getValue()?"true":"false")},e.prototype.updateSpan=function(){this.span.style.display=this.variable.getValue()?"":"none"},e.prototype.toJson=function(){return{type:""}},e}(i.AbstractVariableItem);e.Checkbox=l},9886:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)});Object.defineProperty(e,"__esModule",{value:!0}),e.Combo=void 0;var i=r(6765),s=r(2556),a=r(2165),l=r(3205),c=function(t){function e(e,r,n,o){var i=t.call(this,e,"combobox",r,o)||this;return i.role="combobox",i.inputEvent=!1,i.variable=e.pool.lookup(n),i.register(),i}return o(e,t),e.fromJson=function(t,e,r){return new this(r,e.content,e.variable,e.id)},e.prototype.executeAction=function(){this.variable.setValue(this.input.value,s.MenuUtil.getActiveElement(this))},e.prototype.space=function(e){t.prototype.space.call(this,e),s.MenuUtil.close(this)},e.prototype.focus=function(){t.prototype.focus.call(this),this.input.focus()},e.prototype.unfocus=function(){t.prototype.unfocus.call(this),this.updateSpan()},e.prototype.generateHtml=function(){t.prototype.generateHtml.call(this),this.html.classList.add(a.HtmlClasses.MENUCOMBOBOX)},e.prototype.generateSpan=function(){this.span=document.createElement("span"),this.span.classList.add(a.HtmlClasses.MENUINPUTBOX),this.input=document.createElement("input"),this.input.addEventListener("keydown",this.inputKey.bind(this)),this.input.setAttribute("size","10em"),this.input.setAttribute("type","text"),this.input.setAttribute("tabindex","-1"),this.span.appendChild(this.input)},e.prototype.inputKey=function(t){this.bubbleKey(),this.inputEvent=!0},e.prototype.keydown=function(e){if(this.inputEvent&&e.keyCode!==l.KEY.ESCAPE&&e.keyCode!==l.KEY.RETURN)return this.inputEvent=!1,void e.stopPropagation();t.prototype.keydown.call(this,e),e.stopPropagation()},e.prototype.updateAria=function(){},e.prototype.updateSpan=function(){var t;try{t=this.variable.getValue(s.MenuUtil.getActiveElement(this))}catch(e){t=""}this.input.value=t},e.prototype.toJson=function(){return{type:""}},e}(i.AbstractVariableItem);e.Combo=c},3467:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)});Object.defineProperty(e,"__esModule",{value:!0}),e.Command=void 0;var i=r(1340),s=r(2556),a=function(t){function e(e,r,n,o){var i=t.call(this,e,"command",r,o)||this;return i.command=n,i}return o(e,t),e.fromJson=function(t,e,r){return new this(r,e.content,e.action,e.id)},e.prototype.executeAction=function(){try{this.command(s.MenuUtil.getActiveElement(this))}catch(t){s.MenuUtil.error(t,"Illegal command callback.")}s.MenuUtil.close(this)},e.prototype.toJson=function(){return{type:""}},e}(i.AbstractItem);e.Command=a},2965:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)});Object.defineProperty(e,"__esModule",{value:!0}),e.Label=void 0;var i=r(1340),s=r(2165),a=function(t){function e(e,r,n){return t.call(this,e,"label",r,n)||this}return o(e,t),e.fromJson=function(t,e,r){return new this(r,e.content,e.id)},e.prototype.generateHtml=function(){t.prototype.generateHtml.call(this),this.html.classList.add(s.HtmlClasses.MENULABEL)},e.prototype.toJson=function(){return{type:""}},e}(i.AbstractItem);e.Label=a},385:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)});Object.defineProperty(e,"__esModule",{value:!0}),e.Radio=void 0;var i=r(6765),s=r(2556),a=r(2165),l=function(t){function e(e,r,n,o){var i=t.call(this,e,"radio",r,o)||this;return i.role="menuitemradio",i.variable=e.pool.lookup(n),i.register(),i}return o(e,t),e.fromJson=function(t,e,r){return new this(r,e.content,e.variable,e.id)},e.prototype.executeAction=function(){this.variable.setValue(this.id),s.MenuUtil.close(this)},e.prototype.generateSpan=function(){this.span=document.createElement("span"),this.span.textContent="\u2713",this.span.classList.add(a.HtmlClasses.MENURADIOCHECK)},e.prototype.updateAria=function(){this.html.setAttribute("aria-checked",this.variable.getValue()===this.id?"true":"false")},e.prototype.updateSpan=function(){this.span.style.display=this.variable.getValue()===this.id?"":"none"},e.prototype.toJson=function(){return{type:""}},e}(i.AbstractVariableItem);e.Radio=l},3463:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)});Object.defineProperty(e,"__esModule",{value:!0}),e.Rule=void 0;var i=r(9329),s=r(2165),a=function(t){function e(e){var r=t.call(this,e,"rule")||this;return r.className=s.HtmlClasses.MENUITEM,r.role="separator",r}return o(e,t),e.fromJson=function(t,e,r){return new this(r)},e.prototype.generateHtml=function(){t.prototype.generateHtml.call(this);var e=this.html;e.classList.add(s.HtmlClasses.MENURULE),e.setAttribute("aria-orientation","vertical")},e.prototype.addEvents=function(t){},e.prototype.toJson=function(){return{type:"rule"}},e}(i.AbstractEntry);e.Rule=a},7625:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function r(){this.constructor=t}n(t,e),t.prototype=null===e?Object.create(e):(r.prototype=e.prototype,new r)});Object.defineProperty(e,"__esModule",{value:!0}),e.Slider=void 0;var i=r(6765),s=r(2556),a=r(2165),l=r(3205),c=function(t){function e(e,r,n,o){var i=t.call(this,e,"slider",r,o)||this;return i.role="slider",i.labelId="ctx_slideLabel"+s.MenuUtil.counter(),i.valueId="ctx_slideValue"+s.MenuUtil.counter(),i.inputEvent=!1,i.variable=e.pool.lookup(n),i.register(),i}return o(e,t),e.fromJson=function(t,e,r){return new 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r=e.keyCode;return r===l.KEY.UP||r===l.KEY.DOWN?(e.preventDefault(),void t.prototype.keydown.call(this,e)):this.inputEvent&&r!==l.KEY.ESCAPE&&r!==l.KEY.RETURN?(this.inputEvent=!1,void e.stopPropagation()):(t.prototype.keydown.call(this,e),void e.stopPropagation())},e.prototype.updateAria=function(){var t=this.variable.getValue();t&&this.input&&(this.input.setAttribute("aria-valuenow",t),this.input.setAttribute("aria-valuetext",t+"%"))},e.prototype.updateSpan=function(){var t;try{t=this.variable.getValue(s.MenuUtil.getActiveElement(this)),this.valueSpan.innerHTML=t+"%"}catch(e){t=""}this.input.value=t},e.prototype.toJson=function(){return{type:""}},e}(i.AbstractVariableItem);e.Slider=c},6186:function(t,e,r){var n,o=this&&this.__extends||(n=function(t,e){return n=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r])},n(t,e)},function(t,e){function 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this.semantic.contentNodes.length&&o.walkTree(this.semantic.contentNodes[0]),this.semantic.childNodes.length&&o.walkTree(this.semantic.childNodes[0]),(0,i.setAttributes)(this.mml,this.semantic),this.mml}}e.CaseLine=s},6839:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.CaseMultiindex=void 0;const n=r(5740),o=r(9268),i=r(5452),s=r(2298);class a extends o.AbstractEnrichCase{constructor(t){super(t),this.mml=t.mathmlTree}static multiscriptIndex(t){return"punctuated"===t.type&&"dummy"===t.contentNodes[0].role?i.collapsePunctuated(t):(i.walkTree(t),t.id)}static createNone_(t){const e=n.createElement("none");return t&&(0,s.setAttributes)(e,t),e.setAttribute(s.Attribute.ADDED,"true"),e}completeMultiscript(t,e){const r=n.toArray(this.mml.childNodes).slice(1);let o=0;const l=t=>{for(let e,n=0;e=t[n];n++){const t=r[o];if(t&&e===parseInt(i.getInnerNode(t).getAttribute(s.Attribute.ID)))i.getInnerNode(t).setAttribute(s.Attribute.PARENT,this.semantic.id.toString()),o++;else{const r=this.semantic.querySelectorAll((t=>t.id===e));this.mml.insertBefore(a.createNone_(r[0]),t||null)}}};l(t),r[o]&&"MPRESCRIPTS"!==n.tagName(r[o])?this.mml.insertBefore(r[o],n.createElement("mprescripts")):o++,l(e)}}e.CaseMultiindex=a},7014:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.CaseMultiscripts=void 0;const n=r(5740),o=r(5656),i=r(6839),s=r(5452),a=r(2298);class l extends i.CaseMultiindex{static test(t){if(!t.mathmlTree)return!1;return"MMULTISCRIPTS"===n.tagName(t.mathmlTree)&&("superscript"===t.type||"subscript"===t.type)}constructor(t){super(t)}getMathml(){let t,e,r;if((0,a.setAttributes)(this.mml,this.semantic),this.semantic.childNodes[0]&&"subsup"===this.semantic.childNodes[0].role){const n=this.semantic.childNodes[0];t=n.childNodes[0],e=i.CaseMultiindex.multiscriptIndex(this.semantic.childNodes[1]),r=i.CaseMultiindex.multiscriptIndex(n.childNodes[1]);const l=[this.semantic.id,[n.id,t.id,r],e];s.addCollapsedAttribute(this.mml,l),this.mml.setAttribute(a.Attribute.TYPE,n.role),this.completeMultiscript(o.SemanticSkeleton.interleaveIds(r,e),[])}else{t=this.semantic.childNodes[0],e=i.CaseMultiindex.multiscriptIndex(this.semantic.childNodes[1]);const r=[this.semantic.id,t.id,e];s.addCollapsedAttribute(this.mml,r)}const n=o.SemanticSkeleton.collapsedLeafs(r||[],e),l=s.walkTree(t);return s.getInnerNode(l).setAttribute(a.Attribute.PARENT,this.semantic.id.toString()),n.unshift(t.id),this.mml.setAttribute(a.Attribute.CHILDREN,n.join(",")),this.mml}}e.CaseMultiscripts=l},3416:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.CaseProof=void 0;const n=r(9268),o=r(5452),i=r(2298);class s extends n.AbstractEnrichCase{constructor(t){super(t),this.mml=t.mathmlTree}static test(t){return!!t.mathmlTree&&("inference"===t.type||"premises"===t.type)}getMathml(){return this.semantic.childNodes.length?(this.semantic.contentNodes.forEach((function(t){o.walkTree(t),(0,i.setAttributes)(t.mathmlTree,t)})),this.semantic.childNodes.forEach((function(t){o.walkTree(t)})),(0,i.setAttributes)(this.mml,this.semantic),this.mml.getAttribute("data-semantic-id")===this.mml.getAttribute("data-semantic-parent")&&this.mml.removeAttribute("data-semantic-parent"),this.mml):this.mml}}e.CaseProof=s},5699:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.CaseTable=void 0;const n=r(5740),o=r(9268),i=r(5452),s=r(2298);class a extends o.AbstractEnrichCase{constructor(t){super(t),this.inner=[],this.mml=t.mathmlTree}static test(t){return"matrix"===t.type||"vector"===t.type||"cases"===t.type}getMathml(){const t=i.cloneContentNode(this.semantic.contentNodes[0]),e=this.semantic.contentNodes[1]?i.cloneContentNode(this.semantic.contentNodes[1]):null;if(this.inner=this.semantic.childNodes.map(i.walkTree),this.mml)if("MFENCED"===n.tagName(this.mml)){const r=this.mml.childNodes;this.mml.insertBefore(t,r[0]||null),e&&this.mml.appendChild(e),this.mml=i.rewriteMfenced(this.mml)}else{const r=[t,this.mml];e&&r.push(e),this.mml=i.introduceNewLayer(r,this.semantic)}else this.mml=i.introduceNewLayer([t].concat(this.inner,[e]),this.semantic);return(0,s.setAttributes)(this.mml,this.semantic),this.mml}}e.CaseTable=a},6887:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.CaseTensor=void 0;const n=r(5656),o=r(6839),i=r(5452),s=r(2298);class a extends o.CaseMultiindex{static test(t){return!!t.mathmlTree&&"tensor"===t.type}constructor(t){super(t)}getMathml(){i.walkTree(this.semantic.childNodes[0]);const t=o.CaseMultiindex.multiscriptIndex(this.semantic.childNodes[1]),e=o.CaseMultiindex.multiscriptIndex(this.semantic.childNodes[2]),r=o.CaseMultiindex.multiscriptIndex(this.semantic.childNodes[3]),a=o.CaseMultiindex.multiscriptIndex(this.semantic.childNodes[4]);(0,s.setAttributes)(this.mml,this.semantic);const l=[this.semantic.id,this.semantic.childNodes[0].id,t,e,r,a];i.addCollapsedAttribute(this.mml,l);const c=n.SemanticSkeleton.collapsedLeafs(t,e,r,a);return c.unshift(this.semantic.childNodes[0].id),this.mml.setAttribute(s.Attribute.CHILDREN,c.join(",")),this.completeMultiscript(n.SemanticSkeleton.interleaveIds(r,a),n.SemanticSkeleton.interleaveIds(t,e)),this.mml}}e.CaseTensor=a},9236:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.CaseText=void 0;const n=r(9268),o=r(5452),i=r(2298);class s extends n.AbstractEnrichCase{constructor(t){super(t),this.mml=t.mathmlTree}static test(t){return"punctuated"===t.type&&("text"===t.role||t.contentNodes.every((t=>"dummy"===t.role)))}getMathml(){const t=[],e=o.collapsePunctuated(this.semantic,t);return this.mml=o.introduceNewLayer(t,this.semantic),(0,i.setAttributes)(this.mml,this.semantic),this.mml.removeAttribute(i.Attribute.CONTENT),o.addCollapsedAttribute(this.mml,e),this.mml}}e.CaseText=s},5714:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.prepareMmlString=e.testTranslation__=e.semanticMathml=e.semanticMathmlSync=e.semanticMathmlNode=void 0;const n=r(2057),o=r(5740),i=r(5897),s=r(1414),a=r(5452),l=r(2298);function c(t){const e=o.cloneNode(t),r=s.getTree(e);return a.enrich(e,r)}function u(t){return c(o.parseInput(t))}function p(t){return t.match(/^$/)||(t+=""),t}r(1513),e.semanticMathmlNode=c,e.semanticMathmlSync=u,e.semanticMathml=function(t,e){i.EnginePromise.getall().then((()=>{const r=o.parseInput(t);e(c(r))}))},e.testTranslation__=function(t){n.Debugger.getInstance().init();const e=u(p(t)).toString();return(0,l.removeAttributePrefix)(e),n.Debugger.getInstance().exit(),e},e.prepareMmlString=p},2298:function(t,e){var r;function n(t){return 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h.CaseText(t)})},5452:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.printNodeList__=e.collapsePunctuated=e.formattedOutput_=e.formattedOutput=e.getInnerNode=e.setOperatorAttribute_=e.createInvisibleOperator_=e.rewriteMfenced=e.cloneContentNode=e.addCollapsedAttribute=e.parentNode_=e.isIgnorable_=e.unitChild_=e.descendNode_=e.ascendNewNode=e.validLca_=e.pathToRoot_=e.attachedElement_=e.prunePath_=e.mathmlLca_=e.lcaType=e.functionApplication_=e.isDescendant_=e.insertNewChild_=e.mergeChildren_=e.collectChildNodes_=e.collateChildNodes_=e.childrenSubset_=e.moveSemanticAttributes_=e.introduceLayerAboveLca=e.introduceNewLayer=e.walkTree=e.enrich=e.SETTINGS=void 0;const n=r(2057),o=r(5740),i=r(5897),s=r(3588),a=r(7516),l=r(5656),c=r(4795),u=r(2298),p=r(3532);function h(t){const e=(0,p.getCase)(t);let r;if(e)return r=e.getMathml(),N(r);if(1===t.mathml.length)return n.Debugger.getInstance().output("Walktree Case 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s.BaseRuleStore{constructor(){super(),this.annotators=[],this.parseMethods.Alias=this.defineAlias,this.parseMethods.SpecializedRule=this.defineSpecializedRule,this.parseMethods.Specialized=this.defineSpecialized}initialize(){this.initialized||(this.annotations(),this.initialized=!0)}annotations(){for(let t,e=0;t=this.annotators[e];e++)(0,i.activate)(this.domain,t)}defineAlias(t,e,...r){const n=this.parsePrecondition(e,r);if(!n)return void console.error(`Precondition Error: ${e} ${r}`);const o=this.preconditions.get(t);o?o.addFullCondition(n):console.error(`Alias Error: No precondition by the name of ${t}`)}defineRulesAlias(t,e,...r){const n=this.findAllRules((function(e){return e.name===t}));if(0===n.length)throw new a.OutputError("Rule with name "+t+" does not exist.");const o=[];n.forEach((t=>{(t=>{const e=t.dynamicCstr.toString(),r=t.action.toString();for(let t,n=0;t=o[n];n++)if(t.action===r&&t.cstr===e)return!1;return o.push({cstr:e,action:r}),!0})(t)&&this.addAlias_(t,e,r)}))}defineSpecializedRule(t,e,r,n){const o=this.parseCstr(e),i=this.findRule((e=>e.name===t&&o.equal(e.dynamicCstr))),s=this.parseCstr(r);if(!i&&n)throw new a.OutputError("Rule named "+t+" with style "+e+" does not exist.");const l=n?a.Action.fromString(n):i.action,c=new a.SpeechRule(i.name,s,i.precondition,l);this.addRule(c)}defineSpecialized(t,e,r){const n=this.parseCstr(r);if(!n)return void console.error(`Dynamic Constraint Error: ${r}`);const o=this.preconditions.get(t);o?o.addConstraint(n):console.error(`Alias Error: No precondition by the name of ${t}`)}evaluateString(t){const e=[];if(t.match(/^\s+$/))return e;let r=this.matchNumber_(t);if(r&&r.length===t.length)return e.push(this.evaluateCharacter(r.number)),e;const i=n.removeEmpty(t.replace(/\s/g," ").split(" "));for(let t,n=0;t=i[n];n++)if(1===t.length)e.push(this.evaluateCharacter(t));else if(t.match(new RegExp("^["+o.LOCALE.MESSAGES.regexp.TEXT+"]+$")))e.push(this.evaluateCharacter(t));else{let n=t;for(;n;){r=this.matchNumber_(n);const t=n.match(new RegExp("^["+o.LOCALE.MESSAGES.regexp.TEXT+"]+"));if(r)e.push(this.evaluateCharacter(r.number)),n=n.substring(r.length);else if(t)e.push(this.evaluateCharacter(t[0])),n=n.substring(t[0].length);else{const t=Array.from(n),r=t[0];e.push(this.evaluateCharacter(r)),n=t.slice(1).join("")}}}return e}parse(t){super.parse(t),this.annotators=t.annotators||[]}addAlias_(t,e,r){const n=this.parsePrecondition(e,r),o=new a.SpeechRule(t.name,t.dynamicCstr,n,t.action);o.name=t.name,this.addRule(o)}matchNumber_(t){const e=t.match(new RegExp("^"+o.LOCALE.MESSAGES.regexp.NUMBER)),r=t.match(new RegExp("^"+l.regexp.NUMBER));if(!e&&!r)return null;const n=r&&r[0]===t;if(e&&e[0]===t||!n)return e?{number:e[0],length:e[0].length}:null;return{number:r[0].replace(new RegExp(l.regexp.DIGIT_GROUP,"g"),"X").replace(new RegExp(l.regexp.DECIMAL_MARK,"g"),o.LOCALE.MESSAGES.regexp.DECIMAL_MARK).replace(/X/g,o.LOCALE.MESSAGES.regexp.DIGIT_GROUP.replace(/\\/g,"")),length:r[0].length}}}e.MathStore=l,l.regexp={NUMBER:"((\\d{1,3})(?=(,| ))((,| )\\d{3})*(\\.\\d+)?)|^\\d*\\.\\d+|^\\d+",DECIMAL_MARK:"\\.",DIGIT_GROUP:","}},4650:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.OutputError=e.Precondition=e.Action=e.Component=e.ActionType=e.SpeechRule=void 0;const n=r(5897),o=r(2105);var i;function s(t){switch(t){case"[n]":return i.NODE;case"[m]":return i.MULTI;case"[t]":return i.TEXT;case"[p]":return i.PERSONALITY;default:throw"Parse error: "+t}}e.SpeechRule=class{constructor(t,e,r,n){this.name=t,this.dynamicCstr=e,this.precondition=r,this.action=n,this.context=null}toString(){return this.name+" | "+this.dynamicCstr.toString()+" | "+this.precondition.toString()+" ==> "+this.action.toString()}},function(t){t.NODE="NODE",t.MULTI="MULTI",t.TEXT="TEXT",t.PERSONALITY="PERSONALITY"}(i=e.ActionType||(e.ActionType={}));class a{constructor({type:t,content:e,attributes:r,grammar:n}){this.type=t,this.content=e,this.attributes=r,this.grammar=n}static grammarFromString(t){return o.Grammar.parseInput(t)}static fromString(t){const e={type:s(t.substring(0,3))};let r=t.slice(3).trim();if(!r)throw new u("Missing content.");switch(e.type){case i.TEXT:if('"'===r[0]){const t=p(r,"\\(")[0].trim();if('"'!==t.slice(-1))throw new u("Invalid string syntax.");e.content=t,r=r.slice(t.length).trim(),-1===r.indexOf("(")&&(r="");break}case i.NODE:case i.MULTI:{const t=r.indexOf(" (");if(-1===t){e.content=r.trim(),r="";break}e.content=r.substring(0,t).trim(),r=r.slice(t).trim()}}if(r){const t=a.attributesFromString(r);t.grammar&&(e.grammar=t.grammar,delete t.grammar),Object.keys(t).length&&(e.attributes=t)}return new a(e)}static attributesFromString(t){if("("!==t[0]||")"!==t.slice(-1))throw new u("Invalid attribute expression: "+t);const e={},r=p(t.slice(1,-1),",");for(let t=0,n=r.length;t0?"("+t.join(", ")+")":""}getAttributes(){const t=[];for(const e in this.attributes){const r=this.attributes[e];"true"===r?t.push(e):t.push(e+":"+r)}return t}}e.Component=a;class l{constructor(t){this.components=t}static fromString(t){const e=p(t,";").filter((function(t){return t.match(/\S/)})).map((function(t){return t.trim()})),r=[];for(let t=0,n=e.length;t0?r[0]:null}applyConstraint(t,e){return!!this.applyQuery(t,e)||n.evaluateBoolean(e,t)}constructString(t,e){if(!e)return"";if('"'===e.charAt(0))return e.slice(1,-1);const r=this.customStrings.lookup(e);return r?r(t):n.evaluateString(e,t)}parse(t){const e=Array.isArray(t)?t:Object.entries(t);for(let t,r=0;t=e[r];r++){switch(t[0].slice(0,3)){case"CQF":this.customQueries.add(t[0],t[1]);break;case"CSF":this.customStrings.add(t[0],t[1]);break;case"CTF":this.contextFunctions.add(t[0],t[1]);break;case"CGF":this.customGenerators.add(t[0],t[1]);break;default:console.error("FunctionError: Invalid function name "+t[0])}}}}},2362:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.storeFactory=e.SpeechRuleEngine=void 0;const n=r(7052),o=r(2057),i=r(5740),s=r(5897),a=r(4440),l=r(5274),c=r(7283),u=r(7599),p=r(2469),h=r(1676),f=r(2105),d=r(9935),m=r(4650),y=r(4508);class g{constructor(){this.trie=null,this.evaluators_={},this.trie=new y.Trie}static getInstance(){return g.instance=g.instance||new g,g.instance}static debugSpeechRule(t,e){const r=t.precondition,n=t.context.applyQuery(e,r.query);o.Debugger.getInstance().output(r.query,n?n.toString():n),r.constraints.forEach((r=>o.Debugger.getInstance().output(r,t.context.applyConstraint(e,r))))}static debugNamedSpeechRule(t,e){const r=g.getInstance().trie.collectRules().filter((e=>e.name==t));for(let n,i=0;n=r[i];i++)o.Debugger.getInstance().output("Rule",t,"DynamicCstr:",n.dynamicCstr.toString(),"number",i),g.debugSpeechRule(n,e)}evaluateNode(t){(0,l.updateEvaluator)(t);const e=(new Date).getTime();let r=[];try{r=this.evaluateNode_(t)}catch(t){console.error("Something went wrong computing speech."),o.Debugger.getInstance().output(t)}const n=(new Date).getTime();return o.Debugger.getInstance().output("Time:",n-e),r}toString(){return this.trie.collectRules().map((t=>t.toString())).join("\n")}runInSetting(t,e){const r=s.default.getInstance(),n={};for(const e in t)n[e]=r[e],r[e]=t[e];r.setDynamicCstr();const o=e();for(const t in n)r[t]=n[t];return r.setDynamicCstr(),o}addStore(t){const e=v(t);"abstract"!==e.kind&&e.getSpeechRules().forEach((t=>this.trie.addRule(t))),this.addEvaluator(e)}processGrammar(t,e,r){const n={};for(const o in r){const i=r[o];n[o]="string"==typeof i?t.constructString(e,i):i}f.Grammar.getInstance().pushState(n)}addEvaluator(t){const e=t.evaluateDefault.bind(t),r=this.evaluators_[t.locale];if(r)return void(r[t.modality]=e);const n={};n[t.modality]=e,this.evaluators_[t.locale]=n}getEvaluator(t,e){const r=this.evaluators_[t]||this.evaluators_[h.DynamicCstr.DEFAULT_VALUES[h.Axis.LOCALE]];return r[e]||r[h.DynamicCstr.DEFAULT_VALUES[h.Axis.MODALITY]]}enumerate(t){return this.trie.enumerate(t)}evaluateNode_(t){return t?(this.updateConstraint_(),this.evaluateTree_(t)):[]}evaluateTree_(t){const e=s.default.getInstance();let r;o.Debugger.getInstance().output(e.mode!==a.Mode.HTTP?t.toString():t),f.Grammar.getInstance().setAttribute(t);const i=this.lookupRule(t,e.dynamicCstr);if(!i)return e.strict?[]:(r=this.getEvaluator(e.locale,e.modality)(t),t.attributes&&this.addPersonality_(r,{},!1,t),r);o.Debugger.getInstance().generateOutput((()=>["Apply Rule:",i.name,i.dynamicCstr.toString(),(e.mode,a.Mode.HTTP,t).toString()]));const c=i.context,u=i.action.components;r=[];for(let e,o=0;e=u[o];o++){let o=[];const i=e.content||"",a=e.attributes||{};let u=!1;e.grammar&&this.processGrammar(c,t,e.grammar);let p=null;if(a.engine){p=s.default.getInstance().dynamicCstr.getComponents();const t=f.Grammar.parseInput(a.engine);s.default.getInstance().setDynamicCstr(t)}switch(e.type){case m.ActionType.NODE:{const e=c.applyQuery(t,i);e&&(o=this.evaluateTree_(e))}break;case m.ActionType.MULTI:{u=!0;const e=c.applySelector(t,i);e.length>0&&(o=this.evaluateNodeList_(c,e,a.sepFunc,c.constructString(t,a.separator),a.ctxtFunc,c.constructString(t,a.context)))}break;case m.ActionType.TEXT:{const e=a.span,r={};if(e){const n=(0,l.evalXPath)(e,t);n.length&&(r.extid=n[0].getAttribute("extid"))}const s=c.constructString(t,i);(s||""===s)&&(o=Array.isArray(s)?s.map((function(t){return n.AuditoryDescription.create({text:t.speech,attributes:t.attributes},{adjust:!0})})):[n.AuditoryDescription.create({text:s,attributes:r},{adjust:!0})])}break;case m.ActionType.PERSONALITY:default:o=[n.AuditoryDescription.create({text:i})]}o[0]&&!u&&(a.context&&(o[0].context=c.constructString(t,a.context)+(o[0].context||"")),a.annotation&&(o[0].annotation=a.annotation)),this.addLayout(o,a,u),e.grammar&&f.Grammar.getInstance().popState(),r=r.concat(this.addPersonality_(o,a,u,t)),p&&s.default.getInstance().setDynamicCstr(p)}return r}evaluateNodeList_(t,e,r,o,i,s){if(!e.length)return[];const a=o||"",l=s||"",c=t.contextFunctions.lookup(i),u=c?c(e,l):function(){return l},p=t.contextFunctions.lookup(r),h=p?p(e,a):function(){return[n.AuditoryDescription.create({text:a},{translate:!0})]};let f=[];for(let t,r=0;t=e[r];r++){const n=this.evaluateTree_(t);if(n.length>0&&(n[0].context=u()+(n[0].context||""),f=f.concat(n),r=0;e--){const n=r[e].name;!t.attributes[n]&&n.match(/^ext/)&&(t.attributes[n]=r[e].value)}}}addRelativePersonality_(t,e){if(!t.personality)return t.personality=e,t;const r=t.personality;for(const t in e)r[t]&&"number"==typeof r[t]&&"number"==typeof e[t]?r[t]=r[t]+e[t]:r[t]||(r[t]=e[t]);return t}updateConstraint_(){const t=s.default.getInstance().dynamicCstr,e=s.default.getInstance().strict,r=this.trie,n={};let o=t.getValue(h.Axis.LOCALE),i=t.getValue(h.Axis.MODALITY),a=t.getValue(h.Axis.DOMAIN);r.hasSubtrie([o,i,a])||(a=h.DynamicCstr.DEFAULT_VALUES[h.Axis.DOMAIN],r.hasSubtrie([o,i,a])||(i=h.DynamicCstr.DEFAULT_VALUES[h.Axis.MODALITY],r.hasSubtrie([o,i,a])||(o=h.DynamicCstr.DEFAULT_VALUES[h.Axis.LOCALE]))),n[h.Axis.LOCALE]=[o],n[h.Axis.MODALITY]=["summary"!==i?i:h.DynamicCstr.DEFAULT_VALUES[h.Axis.MODALITY]],n[h.Axis.DOMAIN]=["speech"!==i?h.DynamicCstr.DEFAULT_VALUES[h.Axis.DOMAIN]:a];const l=t.getOrder();for(let r,o=0;r=l[o];o++)if(!n[r]){const o=t.getValue(r),i=this.makeSet_(o,t.preference),s=h.DynamicCstr.DEFAULT_VALUES[r];e||o===s||i.push(s),n[r]=i}t.updateProperties(n)}makeSet_(t,e){return e&&Object.keys(e).length?t.split(":"):[t]}lookupRule(t,e){if(!t||t.nodeType!==i.NodeType.ELEMENT_NODE&&t.nodeType!==i.NodeType.TEXT_NODE)return null;const r=this.lookupRules(t,e);return r.length>0?this.pickMostConstraint_(e,r):null}lookupRules(t,e){return this.trie.lookupRules(t,e.allProperties())}pickMostConstraint_(t,e){const r=s.default.getInstance().comparator;return e.sort((function(t,e){return r.compare(t.dynamicCstr,e.dynamicCstr)||e.precondition.priority-t.precondition.priority||e.precondition.constraints.length-t.precondition.constraints.length||e.precondition.rank-t.precondition.rank})),o.Debugger.getInstance().generateOutput((()=>e.map((t=>t.name+"("+t.dynamicCstr.toString()+")"))).bind(this)),e[0]}}e.SpeechRuleEngine=g;const b=new Map;function v(t){const e=`${t.locale}.${t.modality}.${t.domain}`;if("actions"===t.kind){const r=b.get(e);return r.parse(t),r}u.init(),t&&!t.functions&&(t.functions=c.getStore(t.locale,t.modality,t.domain));const r="braille"===t.modality?new p.BrailleStore:new d.MathStore;return b.set(e,r),t.inherits&&(r.inherits=b.get(`${t.inherits}.${t.modality}.${t.domain}`)),r.parse(t),r.initialize(),r}e.storeFactory=v,s.default.nodeEvaluator=g.getInstance().evaluateNode.bind(g.getInstance())},5662:function(t,e){Object.defineProperty(e,"__esModule",{value:!0}),e.CustomGenerators=e.ContextFunctions=e.CustomStrings=e.CustomQueries=void 0;class r{constructor(t,e){this.prefix=t,this.store=e}add(t,e){this.checkCustomFunctionSyntax_(t)&&(this.store[t]=e)}addStore(t){const e=Object.keys(t.store);for(let r,n=0;r=e[n];n++)this.add(r,t.store[r])}lookup(t){return this.store[t]}checkCustomFunctionSyntax_(t){const e=new RegExp("^"+this.prefix);return!!t.match(e)||(console.error("FunctionError: Invalid function name. 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i(t).xml()},e.getTree=i,e.getTreeFromString=function(t){return i(n.parseInput(t))}},7630:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.annotate=e.activate=e.register=e.visitors=e.annotators=void 0;const n=r(9265);e.annotators=new Map,e.visitors=new Map,e.register=function(t){const r=t.domain+":"+t.name;t instanceof n.SemanticAnnotator?e.annotators.set(r,t):e.visitors.set(r,t)},e.activate=function(t,r){const n=t+":"+r,o=e.annotators.get(n)||e.visitors.get(n);o&&(o.active=!0)},e.annotate=function(t){for(const r of e.annotators.values())r.active&&r.annotate(t);for(const r of e.visitors.values())r.active&&r.visit(t,Object.assign({},r.def))}},9265:function(t,e){Object.defineProperty(e,"__esModule",{value:!0}),e.SemanticVisitor=e.SemanticAnnotator=void 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a.SemanticTreeHeuristic("simpleNamedFunction",(t=>("unit"!==t.role&&-1!==["f","g","h","F","G","H"].indexOf(t.textContent)&&(t.role="simple function"),t)),(t=>"clearspeak"===o.default.getInstance().domain))),s.add(new a.SemanticTreeHeuristic("propagateComposedFunction",(t=>("fenced"===t.type&&"composed function"===t.childNodes[0].role&&(t.role="composed function"),t)),(t=>"clearspeak"===o.default.getInstance().domain))),s.add(new a.SemanticTreeHeuristic("multioperator",(t=>{if("unknown"!==t.role||t.textContent.length<=1)return;const e=[...t.textContent].map(i.lookupMeaning).reduce((function(t,e){return t&&e.role&&"unknown"!==e.role&&e.role!==t?"unknown"===t?e.role:null:t}),"unknown");e&&(t.role=e)}))),s.add(new a.SemanticMultiHeuristic("convert_juxtaposition",(t=>{let e=u.partitionNodes(t,(function(t){return t.textContent===i.invisibleTimes()&&"operator"===t.type}));e=e.rel.length?function(t){const e=[],r=[];let n=t.comp.shift(),o=null,i=[];for(;t.comp.length;)if(i=[],n.length)o&&e.push(o),r.push(n),o=t.rel.shift(),n=t.comp.shift();else{for(o&&i.push(o);!n.length&&t.comp.length;)n=t.comp.shift(),i.push(t.rel.shift());o=p(i,n,r)}i.length||n.length?(e.push(o),r.push(n)):(i.push(o),p(i,n,r));return{rel:e,comp:r}}(e):e,t=e.comp[0];for(let r,n,o=1;r=e.comp[o],n=e.rel[o-1];o++)t.push(n),t=t.concat(r);return e=u.partitionNodes(t,(function(t){return t.textContent===i.invisibleTimes()&&("operator"===t.type||"infixop"===t.type)})),e.rel.length?h(e.comp.shift(),e.rel,e.comp):t}))),s.add(new a.SemanticTreeHeuristic("simple2prefix",(t=>(t.textContent.length>1&&!t.textContent[0].match(/[A-Z]/)&&(t.role="prefix function"),t)),(t=>"braille"===o.default.getInstance().modality&&"identifier"===t.type))),s.add(new a.SemanticTreeHeuristic("detect_cycle",(t=>{t.type="matrix",t.role="cycle";const e=t.childNodes[0];return e.type="row",e.role="cycle",e.textContent="",e.contentNodes=[],t}),(t=>"fenced"===t.type&&"infixop"===t.childNodes[0].type&&"implicit"===t.childNodes[0].role&&t.childNodes[0].childNodes.every((function(t){return"number"===t.type}))&&t.childNodes[0].contentNodes.every((function(t){return"space"===t.role})))))},7228:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.SemanticMathml=void 0;const n=r(5740),o=r(5250),i=r(5609),s=r(3308),a=r(4795);class l extends o.SemanticAbstractParser{constructor(){super("MathML"),this.parseMap_={SEMANTICS:this.semantics_.bind(this),MATH:this.rows_.bind(this),MROW:this.rows_.bind(this),MPADDED:this.rows_.bind(this),MSTYLE:this.rows_.bind(this),MFRAC:this.fraction_.bind(this),MSUB:this.limits_.bind(this),MSUP:this.limits_.bind(this),MSUBSUP:this.limits_.bind(this),MOVER:this.limits_.bind(this),MUNDER:this.limits_.bind(this),MUNDEROVER:this.limits_.bind(this),MROOT:this.root_.bind(this),MSQRT:this.sqrt_.bind(this),MTABLE:this.table_.bind(this),MLABELEDTR:this.tableLabeledRow_.bind(this),MTR:this.tableRow_.bind(this),MTD:this.tableCell_.bind(this),MS:this.text_.bind(this),MTEXT:this.text_.bind(this),MSPACE:this.space_.bind(this),"ANNOTATION-XML":this.text_.bind(this),MI:this.identifier_.bind(this),MN:this.number_.bind(this),MO:this.operator_.bind(this),MFENCED:this.fenced_.bind(this),MENCLOSE:this.enclosed_.bind(this),MMULTISCRIPTS:this.multiscripts_.bind(this),ANNOTATION:this.empty_.bind(this),NONE:this.empty_.bind(this),MACTION:this.action_.bind(this)};const t={type:"identifier",role:"numbersetletter",font:"double-struck"};["C","H","N","P","Q","R","Z","\u2102","\u210d","\u2115","\u2119","\u211a","\u211d","\u2124"].forEach((e=>this.getFactory().defaultMap.add(e,t)).bind(this))}static getAttribute_(t,e,r){if(!t.hasAttribute(e))return r;const n=t.getAttribute(e);return n.match(/^\s*$/)?null:n}parse(t){s.default.getInstance().setNodeFactory(this.getFactory());const e=n.toArray(t.childNodes),r=n.tagName(t),o=this.parseMap_[r],i=(o||this.dummy_.bind(this))(t,e);return a.addAttributes(i,t),-1!==["MATH","MROW","MPADDED","MSTYLE","SEMANTICS"].indexOf(r)||(i.mathml.unshift(t),i.mathmlTree=t),i}semantics_(t,e){return e.length?this.parse(e[0]):this.getFactory().makeEmptyNode()}rows_(t,e){const r=t.getAttribute("semantics");if(r&&r.match("bspr_"))return s.default.proof(t,r,this.parseList.bind(this));let n;return 1===(e=a.purgeNodes(e)).length?(n=this.parse(e[0]),"empty"!==n.type||n.mathmlTree||(n.mathmlTree=t)):n=s.default.getInstance().row(this.parseList(e)),n.mathml.unshift(t),n}fraction_(t,e){if(!e.length)return this.getFactory().makeEmptyNode();const r=this.parse(e[0]),n=e[1]?this.parse(e[1]):this.getFactory().makeEmptyNode();return s.default.getInstance().fractionLikeNode(r,n,t.getAttribute("linethickness"),"true"===t.getAttribute("bevelled"))}limits_(t,e){return s.default.getInstance().limitNode(n.tagName(t),this.parseList(e))}root_(t,e){return e[1]?this.getFactory().makeBranchNode("root",[this.parse(e[1]),this.parse(e[0])],[]):this.sqrt_(t,e)}sqrt_(t,e){const r=this.parseList(a.purgeNodes(e));return this.getFactory().makeBranchNode("sqrt",[s.default.getInstance().row(r)],[])}table_(t,e){const r=t.getAttribute("semantics");if(r&&r.match("bspr_"))return s.default.proof(t,r,this.parseList.bind(this));const n=this.getFactory().makeBranchNode("table",this.parseList(e),[]);return n.mathmlTree=t,s.default.tableToMultiline(n),n}tableRow_(t,e){const r=this.getFactory().makeBranchNode("row",this.parseList(e),[]);return r.role="table",r}tableLabeledRow_(t,e){if(!e.length)return this.tableRow_(t,e);const r=this.parse(e[0]);r.role="label";const n=this.getFactory().makeBranchNode("row",this.parseList(e.slice(1)),[r]);return n.role="table",n}tableCell_(t,e){const r=this.parseList(a.purgeNodes(e));let n;n=r.length?1===r.length&&i.isType(r[0],"empty")?r:[s.default.getInstance().row(r)]:[];const o=this.getFactory().makeBranchNode("cell",n,[]);return o.role="table",o}space_(t,e){const r=t.getAttribute("width"),o=r&&r.match(/[a-z]*$/);if(!o)return this.empty_(t,e);const i=o[0],a=parseFloat(r.slice(0,o.index)),l={cm:.4,pc:.5,em:.5,ex:1,in:.15,pt:5,mm:5}[i];if(!l||isNaN(a)||a1?this.parse(e[1]):this.getFactory().makeUnprocessed(t)}dummy_(t,e){const r=this.getFactory().makeUnprocessed(t);return r.role=t.tagName,r.textContent=t.textContent,r}leaf_(t,e){if(1===e.length&&e[0].nodeType!==n.NodeType.TEXT_NODE){const r=this.getFactory().makeUnprocessed(t);return r.role=e[0].tagName,a.addAttributes(r,e[0]),r}return this.getFactory().makeLeafNode(t.textContent,s.default.getInstance().font(t.getAttribute("mathvariant")))}}e.SemanticMathml=l},5952:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.SemanticNode=void 0;const n=r(5740),o=r(3588),i=r(4795);class s{constructor(t){this.id=t,this.mathml=[],this.parent=null,this.type="unknown",this.role="unknown",this.font="unknown",this.embellished=null,this.fencePointer="",this.childNodes=[],this.textContent="",this.mathmlTree=null,this.contentNodes=[],this.annotation={},this.attributes={},this.nobreaking=!1}static fromXml(t){const e=parseInt(t.getAttribute("id"),10),r=new s(e);return r.type=t.tagName,s.setAttribute(r,t,"role"),s.setAttribute(r,t,"font"),s.setAttribute(r,t,"embellished"),s.setAttribute(r,t,"fencepointer","fencePointer"),t.getAttribute("annotation")&&r.parseAnnotation(t.getAttribute("annotation")),i.addAttributes(r,t),s.processChildren(r,t),r}static setAttribute(t,e,r,n){n=n||r;const o=e.getAttribute(r);o&&(t[n]=o)}static processChildren(t,e){for(const r of n.toArray(e.childNodes)){if(r.nodeType===n.NodeType.TEXT_NODE){t.textContent=r.textContent;continue}const e=n.toArray(r.childNodes).map(s.fromXml);e.forEach((e=>e.parent=t)),"CONTENT"===n.tagName(r)?t.contentNodes=e:t.childNodes=e}}querySelectorAll(t){let e=[];for(let r,n=0;r=this.childNodes[n];n++)e=e.concat(r.querySelectorAll(t));for(let r,n=0;r=this.contentNodes[n];n++)e=e.concat(r.querySelectorAll(t));return t(this)&&e.unshift(this),e}xml(t,e){const r=function(r,n){const o=n.map((function(r){return r.xml(t,e)})),i=t.createElementNS("",r);for(let t,e=0;t=o[e];e++)i.appendChild(t);return i},n=t.createElementNS("",this.type);return e||this.xmlAttributes(n),n.textContent=this.textContent,this.contentNodes.length>0&&n.appendChild(r("content",this.contentNodes)),this.childNodes.length>0&&n.appendChild(r("children",this.childNodes)),n}toString(t=!1){const e=n.parseInput("");return n.serializeXml(this.xml(e,t))}allAttributes(){const t=[];return t.push(["role",this.role]),"unknown"!==this.font&&t.push(["font",this.font]),Object.keys(this.annotation).length&&t.push(["annotation",this.xmlAnnotation()]),this.embellished&&t.push(["embellished",this.embellished]),this.fencePointer&&t.push(["fencepointer",this.fencePointer]),t.push(["id",this.id.toString()]),t}xmlAnnotation(){const t=[];for(const e in this.annotation)this.annotation[e].forEach((function(r){t.push(e+":"+r)}));return t.join(";")}toJson(){const t={};t.type=this.type;const e=this.allAttributes();for(let r,n=0;r=e[n];n++)t[r[0]]=r[1].toString();return this.textContent&&(t.$t=this.textContent),this.childNodes.length&&(t.children=this.childNodes.map((function(t){return t.toJson()}))),this.contentNodes.length&&(t.content=this.contentNodes.map((function(t){return t.toJson()}))),t}updateContent(t,e){const r=e?t.replace(/^[ \f\n\r\t\v\u200b]*/,"").replace(/[ \f\n\r\t\v\u200b]*$/,""):t.trim();if(t=t&&!r?t:r,this.textContent===t)return;const n=(0,o.lookupMeaning)(t);this.textContent=t,this.role=n.role,this.type=n.type,this.font=n.font}addMathmlNodes(t){for(let e,r=0;e=t[r];r++)-1===this.mathml.indexOf(e)&&this.mathml.push(e)}appendChild(t){this.childNodes.push(t),this.addMathmlNodes(t.mathml),t.parent=this}replaceChild(t,e){const r=this.childNodes.indexOf(t);if(-1===r)return;t.parent=null,e.parent=this,this.childNodes[r]=e;const n=t.mathml.filter((function(t){return-1===e.mathml.indexOf(t)})),o=e.mathml.filter((function(e){return-1===t.mathml.indexOf(e)}));this.removeMathmlNodes(n),this.addMathmlNodes(o)}appendContentNode(t){t&&(this.contentNodes.push(t),this.addMathmlNodes(t.mathml),t.parent=this)}removeContentNode(t){if(t){const e=this.contentNodes.indexOf(t);-1!==e&&this.contentNodes.slice(e,1)}}equals(t){if(!t)return!1;if(this.type!==t.type||this.role!==t.role||this.textContent!==t.textContent||this.childNodes.length!==t.childNodes.length||this.contentNodes.length!==t.contentNodes.length)return!1;for(let e,r,n=0;e=this.childNodes[n],r=t.childNodes[n];n++)if(!e.equals(r))return!1;for(let e,r,n=0;e=this.contentNodes[n],r=t.contentNodes[n];n++)if(!e.equals(r))return!1;return!0}displayTree(){console.info(this.displayTree_(0))}addAnnotation(t,e){e&&this.addAnnotation_(t,e)}getAnnotation(t){const e=this.annotation[t];return e||[]}hasAnnotation(t,e){const r=this.annotation[t];return!!r&&-1!==r.indexOf(e)}parseAnnotation(t){const e=t.split(";");for(let t=0,r=e.length;t1)return!1;const r=e[0];if("infixop"===r.type){if("implicit"!==r.role)return!1;if(r.childNodes.some((t=>i(t,"infixop"))))return!1}return!0},e.isPrefixFunctionBoundary=function(t){return c(t)&&!a(t,"division")||i(t,"appl")||l(t)},e.isBigOpBoundary=function(t){return c(t)||l(t)},e.isIntegralDxBoundary=function(t,e){return!!e&&i(e,"identifier")&&n.lookupSecondary("d",t.textContent)},e.isIntegralDxBoundarySingle=function(t){if(i(t,"identifier")){const e=t.textContent[0];return e&&t.textContent[1]&&n.lookupSecondary("d",e)}return!1},e.isGeneralFunctionBoundary=l,e.isEmbellished=function(t){return t.embellished?t.embellished:n.isEmbellishedType(t.type)?t.type:null},e.isOperator=c,e.isRelation=u,e.isPunctuation=p,e.isFence=h,e.isElligibleEmbellishedFence=function(t){return!(!t||!h(t))&&(!t.embellished||f(t))},e.isTableOrMultiline=d,e.tableIsMatrixOrVector=function(t){return!!t&&m(t)&&d(t.childNodes[0])},e.isFencedElement=m,e.tableIsCases=function(t,e){return e.length>0&&a(e[e.length-1],"openfence")},e.tableIsMultiline=function(t){return t.childNodes.every((function(t){return t.childNodes.length<=1}))},e.lineIsLabelled=function(t){return i(t,"line")&&t.contentNodes.length&&a(t.contentNodes[0],"label")},e.isBinomial=function(t){return 2===t.childNodes.length},e.isLimitBase=function t(e){return i(e,"largeop")||i(e,"limboth")||i(e,"limlower")||i(e,"limupper")||i(e,"function")&&a(e,"limit function")||(i(e,"overscore")||i(e,"underscore"))&&t(e.childNodes[0])},e.isSimpleFunctionHead=function(t){return"identifier"===t.type||"latinletter"===t.role||"greekletter"===t.role||"otherletter"===t.role},e.singlePunctAtPosition=function(t,e,r){return 1===e.length&&("punctuation"===t[r].type||"punctuation"===t[r].embellished)&&t[r]===e[0]},e.isSimpleFunction=function(t){return i(t,"identifier")&&a(t,"simple function")},e.isLeftBrace=y,e.isRightBrace=g,e.isSetNode=function(t){return y(t.contentNodes[0])&&g(t.contentNodes[1])},e.illegalSingleton_=["punctuation","punctuated","relseq","multirel","table","multiline","cases","inference"],e.scriptedElement_=["limupper","limlower","limboth","subscript","superscript","underscore","overscore","tensor"],e.isSingletonSetContent=function t(r){const n=r.type;return-1===e.illegalSingleton_.indexOf(n)&&("infixop"!==n||"implicit"===r.role)&&("fenced"===n?"leftright"!==r.role||t(r.childNodes[0]):-1===e.scriptedElement_.indexOf(n)||t(r.childNodes[0]))},e.isNumber=b,e.isUnitCounter=function(t){return b(t)||"vulgar"===t.role||"mixed"===t.role},e.isPureUnit=function(t){const e=t.childNodes;return"unit"===t.role&&(!e.length||"unit"===e[0].role)},e.isImplicit=function(t){return"implicit"===t.role||"unit"===t.role&&!!t.contentNodes.length&&t.contentNodes[0].textContent===n.invisibleTimes()},e.isImplicitOp=function(t){return"infixop"===t.type&&"implicit"===t.role},e.isNeutralFence=v,e.compareNeutralFences=function(t,e){return v(t)&&v(e)&&(0,o.getEmbellishedInner)(t).textContent===(0,o.getEmbellishedInner)(e).textContent},e.elligibleLeftNeutral=function(t){return!!v(t)&&(!t.embellished||"superscript"!==t.type&&"subscript"!==t.type&&("tensor"!==t.type||"empty"===t.childNodes[3].type&&"empty"===t.childNodes[4].type))},e.elligibleRightNeutral=function(t){return!!v(t)&&(!t.embellished||("tensor"!==t.type||"empty"===t.childNodes[1].type&&"empty"===t.childNodes[2].type))},e.isMembership=function(t){return["element","nonelement","reelement","renonelement"].includes(t.role)}},3308:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0});const n=r(5740),o=r(3588),i=r(7516),s=r(6537),a=r(5609),l=r(4795);class c{constructor(){this.funcAppls={},this.factory_=new s.SemanticNodeFactory,i.updateFactory(this.factory_)}static getInstance(){return c.instance=c.instance||new c,c.instance}static tableToMultiline(t){if(a.tableIsMultiline(t)){t.type="multiline";for(let e,r=0;e=t.childNodes[r];r++)c.rowToLine_(e,"multiline");1===t.childNodes.length&&!a.lineIsLabelled(t.childNodes[0])&&a.isFencedElement(t.childNodes[0].childNodes[0])&&c.tableToMatrixOrVector_(c.rewriteFencedLine_(t)),c.binomialForm_(t),c.classifyMultiline(t)}else c.classifyTable(t)}static number(t){"unknown"!==t.type&&"identifier"!==t.type||(t.type="number"),c.numberRole_(t),c.exprFont_(t)}static classifyMultiline(t){let e=0;const r=t.childNodes.length;let n;for(;e=r)return;const o=n.childNodes[0].role;"unknown"!==o&&t.childNodes.every((function(t){const e=t.childNodes[0];return!e||e.role===o&&(a.isType(e,"relation")||a.isType(e,"relseq"))}))&&(t.role=o)}static classifyTable(t){const e=c.computeColumns_(t);c.classifyByColumns_(t,e,"equality")||c.classifyByColumns_(t,e,"inequality",["equality"])||c.classifyByColumns_(t,e,"arrow")||c.detectCaleyTable(t)}static detectCaleyTable(t){if(!t.mathmlTree)return!1;const e=t.mathmlTree,r=e.getAttribute("columnlines"),n=e.getAttribute("rowlines");return!(!r||!n)&&(!(!c.cayleySpacing(r)||!c.cayleySpacing(n))&&(t.role="cayley",!0))}static cayleySpacing(t){const e=t.split(" ");return("solid"===e[0]||"dashed"===e[0])&&e.slice(1).every((t=>"none"===t))}static proof(t,e,r){const n=c.separateSemantics(e);return c.getInstance().proof(t,n,r)}static findSemantics(t,e,r){const n=null==r?null:r,o=c.getSemantics(t);return!!o&&(!!o[e]&&(null==n||o[e]===n))}static getSemantics(t){const e=t.getAttribute("semantics");return e?c.separateSemantics(e):null}static removePrefix(t){const[,...e]=t.split("_");return e.join("_")}static separateSemantics(t){const e={};return t.split(";").forEach((function(t){const[r,n]=t.split(":");e[c.removePrefix(r)]=n})),e}static matchSpaces_(t,e){for(let r,n=0;r=e[n];n++){const e=t[n].mathmlTree,o=t[n+1].mathmlTree;if(!e||!o)continue;const i=e.nextSibling;if(!i||i===o)continue;const s=c.getSpacer_(i);s&&(r.mathml.push(s),r.mathmlTree=s,r.role="space")}}static getSpacer_(t){if("MSPACE"===n.tagName(t))return t;for(;l.hasEmptyTag(t)&&1===t.childNodes.length;)if(t=t.childNodes[0],"MSPACE"===n.tagName(t))return t;return null}static fenceToPunct_(t){const e=c.FENCE_TO_PUNCT_[t.role];if(e){for(;t.embellished;)t.embellished="punctuation",a.isRole(t,"subsup")||a.isRole(t,"underover")||(t.role=e),t=t.childNodes[0];t.type="punctuation",t.role=e}}static classifyFunction_(t,e){if("appl"===t.type||"bigop"===t.type||"integral"===t.type)return"";if(e[0]&&e[0].textContent===o.functionApplication()){c.getInstance().funcAppls[t.id]=e.shift();let r="simple function";return i.run("simple2prefix",t),"prefix function"!==t.role&&"limit function"!==t.role||(r=t.role),c.propagateFunctionRole_(t,r),"prefix"}const r=c.CLASSIFY_FUNCTION_[t.role];return r||(a.isSimpleFunctionHead(t)?"simple":"")}static propagateFunctionRole_(t,e){if(t){if("infixop"===t.type)return;a.isRole(t,"subsup")||a.isRole(t,"underover")||(t.role=e),c.propagateFunctionRole_(t.childNodes[0],e)}}static getFunctionOp_(t,e){if(e(t))return t;for(let r,n=0;r=t.childNodes[n];n++){const t=c.getFunctionOp_(r,e);if(t)return t}return null}static tableToMatrixOrVector_(t){const e=t.childNodes[0];a.isType(e,"multiline")?c.tableToVector_(t):c.tableToMatrix_(t),t.contentNodes.forEach(e.appendContentNode.bind(e));for(let t,r=0;t=e.childNodes[r];r++)c.assignRoleToRow_(t,c.getComponentRoles_(e));return e.parent=null,e}static tableToVector_(t){const e=t.childNodes[0];e.type="vector",1!==e.childNodes.length?c.binomialForm_(e):c.tableToSquare_(t)}static binomialForm_(t){a.isBinomial(t)&&(t.role="binomial",t.childNodes[0].role="binomial",t.childNodes[1].role="binomial")}static tableToMatrix_(t){const e=t.childNodes[0];e.type="matrix",e.childNodes&&e.childNodes.length>0&&e.childNodes[0].childNodes&&e.childNodes.length===e.childNodes[0].childNodes.length?c.tableToSquare_(t):e.childNodes&&1===e.childNodes.length&&(e.role="rowvector")}static tableToSquare_(t){const e=t.childNodes[0];a.isNeutralFence(t)?e.role="determinant":e.role="squarematrix"}static getComponentRoles_(t){const e=t.role;return e&&"unknown"!==e?e:t.type.toLowerCase()||"unknown"}static tableToCases_(t,e){for(let e,r=0;e=t.childNodes[r];r++)c.assignRoleToRow_(e,"cases");return t.type="cases",t.appendContentNode(e),a.tableIsMultiline(t)&&c.binomialForm_(t),t}static rewriteFencedLine_(t){const e=t.childNodes[0],r=t.childNodes[0].childNodes[0],n=t.childNodes[0].childNodes[0].childNodes[0];return r.parent=t.parent,t.parent=r,n.parent=e,r.childNodes=[t],e.childNodes=[n],r}static rowToLine_(t,e){const r=e||"unknown";a.isType(t,"row")&&(t.type="line",t.role=r,1===t.childNodes.length&&a.isType(t.childNodes[0],"cell")&&(t.childNodes=t.childNodes[0].childNodes,t.childNodes.forEach((function(e){e.parent=t}))))}static assignRoleToRow_(t,e){a.isType(t,"line")?t.role=e:a.isType(t,"row")&&(t.role=e,t.childNodes.forEach((function(t){a.isType(t,"cell")&&(t.role=e)})))}static nextSeparatorFunction_(t){let e;if(t){if(t.match(/^\s+$/))return null;e=t.replace(/\s/g,"").split("").filter((function(t){return t}))}else e=[","];return function(){return e.length>1?e.shift():e[0]}}static numberRole_(t){if("unknown"!==t.role)return;const e=[...t.textContent].filter((t=>t.match(/[^\s]/))),r=e.map(o.lookupMeaning);if(r.every((function(t){return"number"===t.type&&"integer"===t.role||"punctuation"===t.type&&"comma"===t.role})))return t.role="integer",void("0"===e[0]&&t.addAnnotation("general","basenumber"));r.every((function(t){return"number"===t.type&&"integer"===t.role||"punctuation"===t.type}))?t.role="float":t.role="othernumber"}static exprFont_(t){if("unknown"!==t.font)return;const e=[...t.textContent].map(o.lookupMeaning).reduce((function(t,e){return t&&e.font&&"unknown"!==e.font&&e.font!==t?"unknown"===t?e.font:null:t}),"unknown");e&&(t.font=e)}static purgeFences_(t){const e=t.rel,r=t.comp,n=[],o=[];for(;e.length>0;){const t=e.shift();let i=r.shift();a.isElligibleEmbellishedFence(t)?(n.push(t),o.push(i)):(c.fenceToPunct_(t),i.push(t),i=i.concat(r.shift()),r.unshift(i))}return o.push(r.shift()),{rel:n,comp:o}}static rewriteFencedNode_(t){const e=t.contentNodes[0],r=t.contentNodes[1];let n=c.rewriteFence_(t,e);return t.contentNodes[0]=n.fence,n=c.rewriteFence_(n.node,r),t.contentNodes[1]=n.fence,t.contentNodes[0].parent=t,t.contentNodes[1].parent=t,n.node.parent=null,n.node}static rewriteFence_(t,e){if(!e.embellished)return{node:t,fence:e};const r=e.childNodes[0],n=c.rewriteFence_(t,r);return a.isType(e,"superscript")||a.isType(e,"subscript")||a.isType(e,"tensor")?(a.isRole(e,"subsup")||(e.role=t.role),r!==n.node&&(e.replaceChild(r,n.node),r.parent=t),c.propagateFencePointer_(e,r),{node:e,fence:n.fence}):(e.replaceChild(r,n.fence),e.mathmlTree&&-1===e.mathml.indexOf(e.mathmlTree)&&e.mathml.push(e.mathmlTree),{node:n.node,fence:e})}static propagateFencePointer_(t,e){t.fencePointer=e.fencePointer||e.id.toString(),t.embellished=null}static classifyByColumns_(t,e,r,n){return!!(3===e.length&&c.testColumns_(e,1,(t=>c.isPureRelation_(t,r)))||2===e.length&&(c.testColumns_(e,1,(t=>c.isEndRelation_(t,r)||c.isPureRelation_(t,r)))||c.testColumns_(e,0,(t=>c.isEndRelation_(t,r,!0)||c.isPureRelation_(t,r)))))&&(t.role=r,!0)}static isEndRelation_(t,e,r){const n=r?t.childNodes.length-1:0;return a.isType(t,"relseq")&&a.isRole(t,e)&&a.isType(t.childNodes[n],"empty")}static isPureRelation_(t,e){return a.isType(t,"relation")&&a.isRole(t,e)}static computeColumns_(t){const e=[];for(let r,n=0;r=t.childNodes[n];n++)for(let t,n=0;t=r.childNodes[n];n++){e[n]?e[n].push(t):e[n]=[t]}return e}static testColumns_(t,e,r){const n=t[e];return!!n&&(n.some((function(t){return t.childNodes.length&&r(t.childNodes[0])}))&&n.every((function(t){return!t.childNodes.length||r(t.childNodes[0])})))}setNodeFactory(t){c.getInstance().factory_=t,i.updateFactory(c.getInstance().factory_)}getNodeFactory(){return c.getInstance().factory_}identifierNode(t,e,r){if("MathML-Unit"===r)t.type="identifier",t.role="unit";else if(!e&&1===t.textContent.length&&("integer"===t.role||"latinletter"===t.role||"greekletter"===t.role)&&"normal"===t.font)return t.font="italic",i.run("simpleNamedFunction",t);return"unknown"===t.type&&(t.type="identifier"),c.exprFont_(t),i.run("simpleNamedFunction",t)}implicitNode(t){if(t=c.getInstance().getMixedNumbers_(t),1===(t=c.getInstance().combineUnits_(t)).length)return t[0];const e=c.getInstance().implicitNode_(t);return i.run("combine_juxtaposition",e)}text(t,e){return c.exprFont_(t),t.type="text","MS"===e?(t.role="string",t):"MSPACE"===e||t.textContent.match(/^\s*$/)?(t.role="space",t):t}row(t){return 0===(t=t.filter((function(t){return!a.isType(t,"empty")}))).length?c.getInstance().factory_.makeEmptyNode():(t=c.getInstance().getFencesInRow_(t),t=c.getInstance().tablesInRow(t),t=c.getInstance().getPunctuationInRow_(t),t=c.getInstance().getTextInRow_(t),t=c.getInstance().getFunctionsInRow_(t),c.getInstance().relationsInRow_(t))}limitNode(t,e){if(!e.length)return c.getInstance().factory_.makeEmptyNode();let r,n=e[0],o="unknown";if(!e[1])return n;if(a.isLimitBase(n)){r=c.MML_TO_LIMIT_[t];const i=r.length;if(o=r.type,e=e.slice(0,r.length+1),1===i&&a.isAccent(e[1])||2===i&&a.isAccent(e[1])&&a.isAccent(e[2]))return r=c.MML_TO_BOUNDS_[t],c.getInstance().accentNode_(n,e,r.type,r.length,r.accent);if(2===i){if(a.isAccent(e[1]))return n=c.getInstance().accentNode_(n,[n,e[1]],{MSUBSUP:"subscript",MUNDEROVER:"underscore"}[t],1,!0),e[2]?c.getInstance().makeLimitNode_(n,[n,e[2]],null,"limupper"):n;if(e[2]&&a.isAccent(e[2]))return n=c.getInstance().accentNode_(n,[n,e[2]],{MSUBSUP:"superscript",MUNDEROVER:"overscore"}[t],1,!0),c.getInstance().makeLimitNode_(n,[n,e[1]],null,"limlower");e[i]||(o="limlower")}return c.getInstance().makeLimitNode_(n,e,null,o)}return r=c.MML_TO_BOUNDS_[t],c.getInstance().accentNode_(n,e,r.type,r.length,r.accent)}tablesInRow(t){let e=l.partitionNodes(t,a.tableIsMatrixOrVector),r=[];for(let t,n=0;t=e.rel[n];n++)r=r.concat(e.comp.shift()),r.push(c.tableToMatrixOrVector_(t));r=r.concat(e.comp.shift()),e=l.partitionNodes(r,a.isTableOrMultiline),r=[];for(let t,n=0;t=e.rel[n];n++){const n=e.comp.shift();a.tableIsCases(t,n)&&c.tableToCases_(t,n.pop()),r=r.concat(n),r.push(t)}return r.concat(e.comp.shift())}mfenced(t,e,r,n){if(r&&n.length>0){const t=c.nextSeparatorFunction_(r),e=[n.shift()];n.forEach((r=>{e.push(c.getInstance().factory_.makeContentNode(t())),e.push(r)})),n=e}return t&&e?c.getInstance().horizontalFencedNode_(c.getInstance().factory_.makeContentNode(t),c.getInstance().factory_.makeContentNode(e),n):(t&&n.unshift(c.getInstance().factory_.makeContentNode(t)),e&&n.push(c.getInstance().factory_.makeContentNode(e)),c.getInstance().row(n))}fractionLikeNode(t,e,r,n){let o;if(!n&&l.isZeroLength(r)){const r=c.getInstance().factory_.makeBranchNode("line",[t],[]),n=c.getInstance().factory_.makeBranchNode("line",[e],[]);return o=c.getInstance().factory_.makeBranchNode("multiline",[r,n],[]),c.binomialForm_(o),c.classifyMultiline(o),o}return o=c.getInstance().fractionNode_(t,e),n&&o.addAnnotation("general","bevelled"),o}tensor(t,e,r,n,o){const i=c.getInstance().factory_.makeBranchNode("tensor",[t,c.getInstance().scriptNode_(e,"leftsub"),c.getInstance().scriptNode_(r,"leftsuper"),c.getInstance().scriptNode_(n,"rightsub"),c.getInstance().scriptNode_(o,"rightsuper")],[]);return i.role=t.role,i.embellished=a.isEmbellished(t),i}pseudoTensor(t,e,r){const n=t=>!a.isType(t,"empty"),o=e.filter(n).length,i=r.filter(n).length;if(!o&&!i)return t;const s=o?i?"MSUBSUP":"MSUB":"MSUP",l=[t];return o&&l.push(c.getInstance().scriptNode_(e,"rightsub",!0)),i&&l.push(c.getInstance().scriptNode_(r,"rightsuper",!0)),c.getInstance().limitNode(s,l)}font(t){const e=c.MATHJAX_FONTS[t];return e||t}proof(t,e,r){if(e.inference||e.axiom||console.log("Noise"),e.axiom){const e=c.getInstance().cleanInference(t.childNodes),n=e.length?c.getInstance().factory_.makeBranchNode("inference",r(e),[]):c.getInstance().factory_.makeEmptyNode();return n.role="axiom",n.mathmlTree=t,n}const n=c.getInstance().inference(t,e,r);return e.proof&&(n.role="proof",n.childNodes[0].role="final"),n}inference(t,e,r){if(e.inferenceRule){const e=c.getInstance().getFormulas(t,[],r);return c.getInstance().factory_.makeBranchNode("inference",[e.conclusion,e.premises],[])}const o=e.labelledRule,i=n.toArray(t.childNodes),s=[];"left"!==o&&"both"!==o||s.push(c.getInstance().getLabel(t,i,r,"left")),"right"!==o&&"both"!==o||s.push(c.getInstance().getLabel(t,i,r,"right"));const a=c.getInstance().getFormulas(t,i,r),l=c.getInstance().factory_.makeBranchNode("inference",[a.conclusion,a.premises],s);return l.mathmlTree=t,l}getLabel(t,e,r,o){const i=c.getInstance().findNestedRow(e,"prooflabel",o),s=c.getInstance().factory_.makeBranchNode("rulelabel",r(n.toArray(i.childNodes)),[]);return s.role=o,s.mathmlTree=i,s}getFormulas(t,e,r){const o=e.length?c.getInstance().findNestedRow(e,"inferenceRule"):t,i="up"===c.getSemantics(o).inferenceRule,s=i?o.childNodes[1]:o.childNodes[0],a=i?o.childNodes[0]:o.childNodes[1],l=s.childNodes[0].childNodes[0],u=n.toArray(l.childNodes[0].childNodes),p=[];let h=1;for(const t of u)h%2&&p.push(t.childNodes[0]),h++;const f=r(p),d=r(n.toArray(a.childNodes[0].childNodes))[0],m=c.getInstance().factory_.makeBranchNode("premises",f,[]);m.mathmlTree=l;const y=c.getInstance().factory_.makeBranchNode("conclusion",[d],[]);return y.mathmlTree=a.childNodes[0].childNodes[0],{conclusion:y,premises:m}}findNestedRow(t,e,r){return c.getInstance().findNestedRow_(t,e,0,r)}cleanInference(t){return n.toArray(t).filter((function(t){return"MSPACE"!==n.tagName(t)}))}operatorNode(t){return"unknown"===t.type&&(t.type="operator"),i.run("multioperator",t)}implicitNode_(t){const e=c.getInstance().factory_.makeMultipleContentNodes(t.length-1,o.invisibleTimes());c.matchSpaces_(t,e);const r=c.getInstance().infixNode_(t,e[0]);return r.role="implicit",e.forEach((function(t){t.parent=r})),r.contentNodes=e,r}infixNode_(t,e){const r=c.getInstance().factory_.makeBranchNode("infixop",t,[e],l.getEmbellishedInner(e).textContent);return r.role=e.role,i.run("propagateSimpleFunction",r)}explicitMixed_(t){const e=l.partitionNodes(t,(function(t){return t.textContent===o.invisiblePlus()}));if(!e.rel.length)return t;let r=[];for(let t,n=0;t=e.rel[n];n++){const o=e.comp[n],i=e.comp[n+1],s=o.length-1;if(o[s]&&i[0]&&a.isType(o[s],"number")&&!a.isRole(o[s],"mixed")&&a.isType(i[0],"fraction")){const t=c.getInstance().factory_.makeBranchNode("number",[o[s],i[0]],[]);t.role="mixed",r=r.concat(o.slice(0,s)),r.push(t),i.shift()}else r=r.concat(o),r.push(t)}return r.concat(e.comp[e.comp.length-1])}concatNode_(t,e,r){if(0===e.length)return t;const n=e.map((function(t){return l.getEmbellishedInner(t).textContent})).join(" "),o=c.getInstance().factory_.makeBranchNode(r,[t],e,n);return e.length>1&&(o.role="multiop"),o}prefixNode_(t,e){const r=l.partitionNodes(e,(t=>a.isRole(t,"subtraction")));let n=c.getInstance().concatNode_(t,r.comp.pop(),"prefixop");for(1===n.contentNodes.length&&"addition"===n.contentNodes[0].role&&"+"===n.contentNodes[0].textContent&&(n.role="positive");r.rel.length>0;)n=c.getInstance().concatNode_(n,[r.rel.pop()],"prefixop"),n.role="negative",n=c.getInstance().concatNode_(n,r.comp.pop(),"prefixop");return n}postfixNode_(t,e){return e.length?c.getInstance().concatNode_(t,e,"postfixop"):t}combineUnits_(t){const e=l.partitionNodes(t,(function(t){return!a.isRole(t,"unit")}));if(t.length===e.rel.length)return e.rel;const r=[];let n,o;do{const t=e.comp.shift();n=e.rel.shift();let i=null;o=r.pop(),o&&(t.length&&a.isUnitCounter(o)?t.unshift(o):r.push(o)),1===t.length&&(i=t.pop()),t.length>1&&(i=c.getInstance().implicitNode_(t),i.role="unit"),i&&r.push(i),n&&r.push(n)}while(n);return r}getMixedNumbers_(t){const e=l.partitionNodes(t,(function(t){return a.isType(t,"fraction")&&a.isRole(t,"vulgar")}));if(!e.rel.length)return t;let r=[];for(let t,n=0;t=e.rel[n];n++){const o=e.comp[n],i=o.length-1;if(o[i]&&a.isType(o[i],"number")&&(a.isRole(o[i],"integer")||a.isRole(o[i],"float"))){const e=c.getInstance().factory_.makeBranchNode("number",[o[i],t],[]);e.role="mixed",r=r.concat(o.slice(0,i)),r.push(e)}else r=r.concat(o),r.push(t)}return r.concat(e.comp[e.comp.length-1])}getTextInRow_(t){if(t.length<=1)return t;const e=l.partitionNodes(t,(t=>a.isType(t,"text")));if(0===e.rel.length)return t;const r=[];let n=e.comp[0];n.length>0&&r.push(c.getInstance().row(n));for(let t,o=0;t=e.rel[o];o++)r.push(t),n=e.comp[o+1],n.length>0&&r.push(c.getInstance().row(n));return[c.getInstance().dummyNode_(r)]}relationsInRow_(t){const e=l.partitionNodes(t,a.isRelation),r=e.rel[0];if(!r)return c.getInstance().operationsInRow_(t);if(1===t.length)return t[0];const n=e.comp.map(c.getInstance().operationsInRow_);let o;return e.rel.some((function(t){return!t.equals(r)}))?(o=c.getInstance().factory_.makeBranchNode("multirel",n,e.rel),e.rel.every((function(t){return t.role===r.role}))&&(o.role=r.role),o):(o=c.getInstance().factory_.makeBranchNode("relseq",n,e.rel,l.getEmbellishedInner(r).textContent),o.role=r.role,o)}operationsInRow_(t){if(0===t.length)return c.getInstance().factory_.makeEmptyNode();if(1===(t=c.getInstance().explicitMixed_(t)).length)return t[0];const e=[];for(;t.length>0&&a.isOperator(t[0]);)e.push(t.shift());if(0===t.length)return c.getInstance().prefixNode_(e.pop(),e);if(1===t.length)return c.getInstance().prefixNode_(t[0],e);t=i.run("convert_juxtaposition",t);const r=l.sliceNodes(t,a.isOperator),n=c.getInstance().prefixNode_(c.getInstance().implicitNode(r.head),e);return r.div?c.getInstance().operationsTree_(r.tail,n,r.div):n}operationsTree_(t,e,r,n){const o=n||[];if(0===t.length){if(o.unshift(r),"infixop"===e.type){const t=c.getInstance().postfixNode_(e.childNodes.pop(),o);return e.appendChild(t),e}return c.getInstance().postfixNode_(e,o)}const i=l.sliceNodes(t,a.isOperator);if(0===i.head.length)return o.push(i.div),c.getInstance().operationsTree_(i.tail,e,r,o);const s=c.getInstance().prefixNode_(c.getInstance().implicitNode(i.head),o),u=c.getInstance().appendOperand_(e,r,s);return i.div?c.getInstance().operationsTree_(i.tail,u,i.div,[]):u}appendOperand_(t,e,r){if("infixop"!==t.type)return c.getInstance().infixNode_([t,r],e);const n=c.getInstance().appendDivisionOp_(t,e,r);return n||(c.getInstance().appendExistingOperator_(t,e,r)?t:"multiplication"===e.role?c.getInstance().appendMultiplicativeOp_(t,e,r):c.getInstance().appendAdditiveOp_(t,e,r))}appendDivisionOp_(t,e,r){return"division"===e.role?a.isImplicit(t)?c.getInstance().infixNode_([t,r],e):c.getInstance().appendLastOperand_(t,e,r):"division"===t.role?c.getInstance().infixNode_([t,r],e):null}appendLastOperand_(t,e,r){let n=t,o=t.childNodes[t.childNodes.length-1];for(;o&&"infixop"===o.type&&!a.isImplicit(o);)n=o,o=n.childNodes[t.childNodes.length-1];const i=c.getInstance().infixNode_([n.childNodes.pop(),r],e);return n.appendChild(i),t}appendMultiplicativeOp_(t,e,r){if(a.isImplicit(t))return c.getInstance().infixNode_([t,r],e);let n=t,o=t.childNodes[t.childNodes.length-1];for(;o&&"infixop"===o.type&&!a.isImplicit(o);)n=o,o=n.childNodes[t.childNodes.length-1];const i=c.getInstance().infixNode_([n.childNodes.pop(),r],e);return n.appendChild(i),t}appendAdditiveOp_(t,e,r){return c.getInstance().infixNode_([t,r],e)}appendExistingOperator_(t,e,r){return!(!t||"infixop"!==t.type||a.isImplicit(t))&&(t.contentNodes[0].equals(e)?(t.appendContentNode(e),t.appendChild(r),!0):c.getInstance().appendExistingOperator_(t.childNodes[t.childNodes.length-1],e,r))}getFencesInRow_(t){let e=l.partitionNodes(t,a.isFence);e=c.purgeFences_(e);const r=e.comp.shift();return c.getInstance().fences_(e.rel,e.comp,[],[r])}fences_(t,e,r,n){if(0===t.length&&0===r.length)return n[0];const o=t=>a.isRole(t,"open");if(0===t.length){const t=n.shift();for(;r.length>0;){if(o(r[0])){const e=r.shift();c.fenceToPunct_(e),t.push(e)}else{const e=l.sliceNodes(r,o),i=e.head.length-1,s=c.getInstance().neutralFences_(e.head,n.slice(0,i));n=n.slice(i),t.push(...s),e.div&&e.tail.unshift(e.div),r=e.tail}t.push(...n.shift())}return t}const i=r[r.length-1],s=t[0].role;if("open"===s||a.isNeutralFence(t[0])&&(!i||!a.compareNeutralFences(t[0],i))){r.push(t.shift());const o=e.shift();return o&&n.push(o),c.getInstance().fences_(t,e,r,n)}if(i&&"close"===s&&"open"===i.role){const o=c.getInstance().horizontalFencedNode_(r.pop(),t.shift(),n.pop());return n.push(n.pop().concat([o],e.shift())),c.getInstance().fences_(t,e,r,n)}if(i&&a.compareNeutralFences(t[0],i)){if(!a.elligibleLeftNeutral(i)||!a.elligibleRightNeutral(t[0])){r.push(t.shift());const o=e.shift();return o&&n.push(o),c.getInstance().fences_(t,e,r,n)}const o=c.getInstance().horizontalFencedNode_(r.pop(),t.shift(),n.pop());return n.push(n.pop().concat([o],e.shift())),c.getInstance().fences_(t,e,r,n)}if(i&&"close"===s&&a.isNeutralFence(i)&&r.some(o)){const i=l.sliceNodes(r,o,!0),s=n.pop(),a=n.length-i.tail.length+1,u=c.getInstance().neutralFences_(i.tail,n.slice(a));n=n.slice(0,a);const p=c.getInstance().horizontalFencedNode_(i.div,t.shift(),n.pop().concat(u,s));return n.push(n.pop().concat([p],e.shift())),c.getInstance().fences_(t,e,i.head,n)}const u=t.shift();return c.fenceToPunct_(u),n.push(n.pop().concat([u],e.shift())),c.getInstance().fences_(t,e,r,n)}neutralFences_(t,e){if(0===t.length)return t;if(1===t.length)return c.fenceToPunct_(t[0]),t;const r=t.shift();if(!a.elligibleLeftNeutral(r)){c.fenceToPunct_(r);const n=e.shift();return n.unshift(r),n.concat(c.getInstance().neutralFences_(t,e))}const n=l.sliceNodes(t,(function(t){return a.compareNeutralFences(t,r)}));if(!n.div){c.fenceToPunct_(r);const n=e.shift();return n.unshift(r),n.concat(c.getInstance().neutralFences_(t,e))}if(!a.elligibleRightNeutral(n.div))return c.fenceToPunct_(n.div),t.unshift(r),c.getInstance().neutralFences_(t,e);const o=c.getInstance().combineFencedContent_(r,n.div,n.head,e);if(n.tail.length>0){const t=o.shift(),e=c.getInstance().neutralFences_(n.tail,o);return t.concat(e)}return o[0]}combineFencedContent_(t,e,r,n){if(0===r.length){const r=c.getInstance().horizontalFencedNode_(t,e,n.shift());return n.length>0?n[0].unshift(r):n=[[r]],n}const o=n.shift(),i=r.length-1,s=n.slice(0,i),a=(n=n.slice(i)).shift(),l=c.getInstance().neutralFences_(r,s);o.push(...l),o.push(...a);const u=c.getInstance().horizontalFencedNode_(t,e,o);return n.length>0?n[0].unshift(u):n=[[u]],n}horizontalFencedNode_(t,e,r){const n=c.getInstance().row(r);let o=c.getInstance().factory_.makeBranchNode("fenced",[n],[t,e]);return"open"===t.role?(c.getInstance().classifyHorizontalFence_(o),o=i.run("propagateComposedFunction",o)):o.role=t.role,o=i.run("detect_cycle",o),c.rewriteFencedNode_(o)}classifyHorizontalFence_(t){t.role="leftright";const e=t.childNodes;if(!a.isSetNode(t)||e.length>1)return;if(0===e.length||"empty"===e[0].type)return void(t.role="set empty");const r=e[0].type;if(1===e.length&&a.isSingletonSetContent(e[0]))return void(t.role="set singleton");const n=e[0].role;if("punctuated"===r&&"sequence"===n){if("comma"!==e[0].contentNodes[0].role)return 1!==e[0].contentNodes.length||"vbar"!==e[0].contentNodes[0].role&&"colon"!==e[0].contentNodes[0].role?void 0:(t.role="set extended",void c.getInstance().setExtension_(t));t.role="set collection"}}setExtension_(t){const e=t.childNodes[0].childNodes[0];e&&"infixop"===e.type&&1===e.contentNodes.length&&a.isMembership(e.contentNodes[0])&&(e.addAnnotation("set","intensional"),e.contentNodes[0].addAnnotation("set","intensional"))}getPunctuationInRow_(t){if(t.length<=1)return t;const e=t=>{const e=t.type;return"punctuation"===e||"text"===e||"operator"===e||"relation"===e},r=l.partitionNodes(t,(function(r){if(!a.isPunctuation(r))return!1;if(a.isPunctuation(r)&&!a.isRole(r,"ellipsis"))return!0;const n=t.indexOf(r);if(0===n)return!t[1]||!e(t[1]);const o=t[n-1];if(n===t.length-1)return!e(o);const i=t[n+1];return!e(o)||!e(i)}));if(0===r.rel.length)return t;const n=[];let o=r.comp.shift();o.length>0&&n.push(c.getInstance().row(o));let i=0;for(;r.comp.length>0;)n.push(r.rel[i++]),o=r.comp.shift(),o.length>0&&n.push(c.getInstance().row(o));return[c.getInstance().punctuatedNode_(n,r.rel)]}punctuatedNode_(t,e){const r=c.getInstance().factory_.makeBranchNode("punctuated",t,e);if(e.length===t.length){const t=e[0].role;if("unknown"!==t&&e.every((function(e){return e.role===t})))return r.role=t,r}return a.singlePunctAtPosition(t,e,0)?r.role="startpunct":a.singlePunctAtPosition(t,e,t.length-1)?r.role="endpunct":e.every((t=>a.isRole(t,"dummy")))?r.role="text":e.every((t=>a.isRole(t,"space")))?r.role="space":r.role="sequence",r}dummyNode_(t){const e=c.getInstance().factory_.makeMultipleContentNodes(t.length-1,o.invisibleComma());return e.forEach((function(t){t.role="dummy"})),c.getInstance().punctuatedNode_(t,e)}accentRole_(t,e){if(!a.isAccent(t))return!1;const r=t.textContent,n=o.lookupSecondary("bar",r)||o.lookupSecondary("tilde",r)||t.role;return t.role="underscore"===e?"underaccent":"overaccent",t.addAnnotation("accent",n),!0}accentNode_(t,e,r,n,o){const i=(e=e.slice(0,n+1))[1],s=e[2];let a;if(!o&&s&&(a=c.getInstance().factory_.makeBranchNode("subscript",[t,i],[]),a.role="subsup",e=[a,s],r="superscript"),o){const n=c.getInstance().accentRole_(i,r);if(s){c.getInstance().accentRole_(s,"overscore")&&!n?(a=c.getInstance().factory_.makeBranchNode("overscore",[t,s],[]),e=[a,i],r="underscore"):(a=c.getInstance().factory_.makeBranchNode("underscore",[t,i],[]),e=[a,s],r="overscore"),a.role="underover"}}return c.getInstance().makeLimitNode_(t,e,a,r)}makeLimitNode_(t,e,r,n){if("limupper"===n&&"limlower"===t.type)return t.childNodes.push(e[1]),e[1].parent=t,t.type="limboth",t;if("limlower"===n&&"limupper"===t.type)return t.childNodes.splice(1,-1,e[1]),e[1].parent=t,t.type="limboth",t;const o=c.getInstance().factory_.makeBranchNode(n,e,[]),i=a.isEmbellished(t);return r&&(r.embellished=i),o.embellished=i,o.role=t.role,o}getFunctionsInRow_(t,e){const r=e||[];if(0===t.length)return r;const n=t.shift(),o=c.classifyFunction_(n,t);if(!o)return r.push(n),c.getInstance().getFunctionsInRow_(t,r);const i=c.getInstance().getFunctionsInRow_(t,[]),s=c.getInstance().getFunctionArgs_(n,i,o);return r.concat(s)}getFunctionArgs_(t,e,r){let n,o,i;switch(r){case"integral":{const r=c.getInstance().getIntegralArgs_(e);if(!r.intvar&&!r.integrand.length)return r.rest.unshift(t),r.rest;const n=c.getInstance().row(r.integrand);return i=c.getInstance().integralNode_(t,n,r.intvar),r.rest.unshift(i),r.rest}case"prefix":if(e[0]&&"fenced"===e[0].type){const r=e.shift();return a.isNeutralFence(r)||(r.role="leftright"),i=c.getInstance().functionNode_(t,r),e.unshift(i),e}if(n=l.sliceNodes(e,a.isPrefixFunctionBoundary),n.head.length)o=c.getInstance().row(n.head),n.div&&n.tail.unshift(n.div);else{if(!n.div||!a.isType(n.div,"appl"))return e.unshift(t),e;o=n.div}return i=c.getInstance().functionNode_(t,o),n.tail.unshift(i),n.tail;case"bigop":return n=l.sliceNodes(e,a.isBigOpBoundary),n.head.length?(o=c.getInstance().row(n.head),i=c.getInstance().bigOpNode_(t,o),n.div&&n.tail.unshift(n.div),n.tail.unshift(i),n.tail):(e.unshift(t),e);default:{if(0===e.length)return[t];const r=e[0];return"fenced"===r.type&&!a.isNeutralFence(r)&&a.isSimpleFunctionScope(r)?(r.role="leftright",c.propagateFunctionRole_(t,"simple function"),i=c.getInstance().functionNode_(t,e.shift()),e.unshift(i),e):(e.unshift(t),e)}}}getIntegralArgs_(t,e=[]){if(0===t.length)return{integrand:e,intvar:null,rest:t};const r=t[0];if(a.isGeneralFunctionBoundary(r))return{integrand:e,intvar:null,rest:t};if(a.isIntegralDxBoundarySingle(r))return r.role="integral",{integrand:e,intvar:r,rest:t.slice(1)};if(t[1]&&a.isIntegralDxBoundary(r,t[1])){const n=c.getInstance().prefixNode_(t[1],[r]);return n.role="integral",{integrand:e,intvar:n,rest:t.slice(2)}}return e.push(t.shift()),c.getInstance().getIntegralArgs_(t,e)}functionNode_(t,e){const r=c.getInstance().factory_.makeContentNode(o.functionApplication()),n=c.getInstance().funcAppls[t.id];n&&(r.mathmlTree=n.mathmlTree,r.mathml=n.mathml,r.annotation=n.annotation,r.attributes=n.attributes,delete c.getInstance().funcAppls[t.id]),r.type="punctuation",r.role="application";const i=c.getFunctionOp_(t,(function(t){return a.isType(t,"function")||a.isType(t,"identifier")&&a.isRole(t,"simple function")}));return c.getInstance().functionalNode_("appl",[t,e],i,[r])}bigOpNode_(t,e){const r=c.getFunctionOp_(t,(t=>a.isType(t,"largeop")));return c.getInstance().functionalNode_("bigop",[t,e],r,[])}integralNode_(t,e,r){e=e||c.getInstance().factory_.makeEmptyNode(),r=r||c.getInstance().factory_.makeEmptyNode();const n=c.getFunctionOp_(t,(t=>a.isType(t,"largeop")));return c.getInstance().functionalNode_("integral",[t,e,r],n,[])}functionalNode_(t,e,r,n){const o=e[0];let i;r&&(i=r.parent,n.push(r));const s=c.getInstance().factory_.makeBranchNode(t,e,n);return s.role=o.role,i&&(r.parent=i),s}fractionNode_(t,e){const r=c.getInstance().factory_.makeBranchNode("fraction",[t,e],[]);return r.role=r.childNodes.every((function(t){return a.isType(t,"number")&&a.isRole(t,"integer")}))?"vulgar":r.childNodes.every(a.isPureUnit)?"unit":"division",i.run("propagateSimpleFunction",r)}scriptNode_(t,e,r){let n;switch(t.length){case 0:n=c.getInstance().factory_.makeEmptyNode();break;case 1:if(n=t[0],r)return n;break;default:n=c.getInstance().dummyNode_(t)}return n.role=e,n}findNestedRow_(t,e,r,o){if(r>3)return null;for(let i,s=0;i=t[s];s++){const t=n.tagName(i);if("MSPACE"!==t){if("MROW"===t)return c.getInstance().findNestedRow_(n.toArray(i.childNodes),e,r+1,o);if(c.findSemantics(i,e,o))return i}}return null}}e.default=c,c.FENCE_TO_PUNCT_={metric:"metric",neutral:"vbar",open:"openfence",close:"closefence"},c.MML_TO_LIMIT_={MSUB:{type:"limlower",length:1},MUNDER:{type:"limlower",length:1},MSUP:{type:"limupper",length:1},MOVER:{type:"limupper",length:1},MSUBSUP:{type:"limboth",length:2},MUNDEROVER:{type:"limboth",length:2}},c.MML_TO_BOUNDS_={MSUB:{type:"subscript",length:1,accent:!1},MSUP:{type:"superscript",length:1,accent:!1},MSUBSUP:{type:"subscript",length:2,accent:!1},MUNDER:{type:"underscore",length:1,accent:!0},MOVER:{type:"overscore",length:1,accent:!0},MUNDEROVER:{type:"underscore",length:2,accent:!0}},c.CLASSIFY_FUNCTION_={integral:"integral",sum:"bigop","prefix function":"prefix","limit function":"prefix","simple function":"prefix","composed function":"prefix"},c.MATHJAX_FONTS={"-tex-caligraphic":"caligraphic","-tex-caligraphic-bold":"caligraphic-bold","-tex-calligraphic":"caligraphic","-tex-calligraphic-bold":"caligraphic-bold","-tex-oldstyle":"oldstyle","-tex-oldstyle-bold":"oldstyle-bold","-tex-mathit":"italic"}},5656:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.SemanticSkeleton=void 0;const n=r(707),o=r(5274),i=r(2298);class s{constructor(t){this.parents=null,this.levelsMap=null,t=0===t?t:t||[],this.array=t}static fromTree(t){return s.fromNode(t.root)}static fromNode(t){return new s(s.fromNode_(t))}static fromString(t){return new s(s.fromString_(t))}static simpleCollapseStructure(t){return"number"==typeof t}static contentCollapseStructure(t){return!!t&&!s.simpleCollapseStructure(t)&&"c"===t[0]}static interleaveIds(t,e){return n.interleaveLists(s.collapsedLeafs(t),s.collapsedLeafs(e))}static collapsedLeafs(...t){return t.reduce(((t,e)=>{return t.concat((r=e,s.simpleCollapseStructure(r)?[r]:(r=r,s.contentCollapseStructure(r[1])?r.slice(2):r.slice(1))));var r}),[])}static fromStructure(t,e){return new s(s.tree_(t,e.root))}static combineContentChildren(t,e,r){switch(t.type){case"relseq":case"infixop":case"multirel":return n.interleaveLists(r,e);case"prefixop":return e.concat(r);case"postfixop":return r.concat(e);case"fenced":return r.unshift(e[0]),r.push(e[1]),r;case"appl":return[r[0],e[0],r[1]];case"root":return[r[1],r[0]];case"row":case"line":return e.length&&r.unshift(e[0]),r;default:return r}}static makeSexp_(t){return s.simpleCollapseStructure(t)?t.toString():s.contentCollapseStructure(t)?"(c "+t.slice(1).map(s.makeSexp_).join(" ")+")":"("+t.map(s.makeSexp_).join(" ")+")"}static fromString_(t){let e=t.replace(/\(/g,"[");return e=e.replace(/\)/g,"]"),e=e.replace(/ /g,","),e=e.replace(/c/g,'"c"'),JSON.parse(e)}static fromNode_(t){if(!t)return[];const e=t.contentNodes;let r;e.length&&(r=e.map(s.fromNode_),r.unshift("c"));const n=t.childNodes;if(!n.length)return e.length?[t.id,r]:t.id;const o=n.map(s.fromNode_);return e.length&&o.unshift(r),o.unshift(t.id),o}static tree_(t,e){if(!e)return[];if(!e.childNodes.length)return e.id;const r=e.id,n=[r],a=o.evalXPath(`.//self::*[@${i.Attribute.ID}=${r}]`,t)[0],l=s.combineContentChildren(e,e.contentNodes.map((function(t){return t})),e.childNodes.map((function(t){return t})));a&&s.addOwns_(a,l);for(let e,r=0;e=l[r];r++)n.push(s.tree_(t,e));return n}static addOwns_(t,e){const r=t.getAttribute(i.Attribute.COLLAPSED),n=r?s.realLeafs_(s.fromString(r).array):e.map((t=>t.id));t.setAttribute(i.Attribute.OWNS,n.join(" "))}static realLeafs_(t){if(s.simpleCollapseStructure(t))return[t];if(s.contentCollapseStructure(t))return[];t=t;let e=[];for(let r=1;rs.simpleCollapseStructure(t)?t:s.contentCollapseStructure(t)?t[1]:t[0]))}subtreeNodes(t){if(!this.isRoot(t))return[];const e=(t,r)=>{s.simpleCollapseStructure(t)?r.push(t):(t=t,s.contentCollapseStructure(t)&&(t=t.slice(1)),t.forEach((t=>e(t,r))))},r=this.levelsMap[t],n=[];return e(r.slice(1),n),n}}e.SemanticSkeleton=s},7075:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.SemanticTree=void 0;const n=r(5740),o=r(7630),i=r(9265),s=r(7228),a=r(5952),l=r(5609);r(94);class c{constructor(t){this.mathml=t,this.parser=new s.SemanticMathml,this.root=this.parser.parse(t),this.collator=this.parser.getFactory().leafMap.collateMeaning();const e=this.collator.newDefault();e&&(this.parser=new s.SemanticMathml,this.parser.getFactory().defaultMap=e,this.root=this.parser.parse(t)),u.visit(this.root,{}),(0,o.annotate)(this.root)}static empty(){const t=n.parseInput(""),e=new c(t);return e.mathml=t,e}static fromNode(t,e){const r=c.empty();return r.root=t,e&&(r.mathml=e),r}static fromRoot(t,e){let r=t;for(;r.parent;)r=r.parent;const n=c.fromNode(r);return e&&(n.mathml=e),n}static fromXml(t){const e=c.empty();return t.childNodes[0]&&(e.root=a.SemanticNode.fromXml(t.childNodes[0])),e}xml(t){const e=n.parseInput(""),r=this.root.xml(e.ownerDocument,t);return e.appendChild(r),e}toString(t){return n.serializeXml(this.xml(t))}formatXml(t){const e=this.toString(t);return n.formatXml(e)}displayTree(){this.root.displayTree()}replaceNode(t,e){const r=t.parent;r?r.replaceChild(t,e):this.root=e}toJson(){const t={};return t.stree=this.root.toJson(),t}}e.SemanticTree=c;const u=new i.SemanticVisitor("general","unit",((t,e)=>{if("infixop"===t.type&&("multiplication"===t.role||"implicit"===t.role)){const e=t.childNodes;e.length&&(l.isPureUnit(e[0])||l.isUnitCounter(e[0]))&&t.childNodes.slice(1).every(l.isPureUnit)&&(t.role="unit")}return!1}))},4795:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.partitionNodes=e.sliceNodes=e.getEmbellishedInner=e.addAttributes=e.isZeroLength=e.purgeNodes=e.isOrphanedGlyph=e.hasDisplayTag=e.hasEmptyTag=e.hasIgnoreTag=e.hasLeafTag=e.hasMathTag=e.directSpeechKeys=e.DISPLAYTAGS=e.EMPTYTAGS=e.IGNORETAGS=e.LEAFTAGS=void 0;const n=r(5740);function o(t){return!!t&&-1!==e.LEAFTAGS.indexOf(n.tagName(t))}function i(t,e,r){r&&t.reverse();const n=[];for(let o,i=0;o=t[i];i++){if(e(o))return r?{head:t.slice(i+1).reverse(),div:o,tail:n.reverse()}:{head:n,div:o,tail:t.slice(i+1)};n.push(o)}return r?{head:[],div:null,tail:n.reverse()}:{head:n,div:null,tail:[]}}e.LEAFTAGS=["MO","MI","MN","MTEXT","MS","MSPACE"],e.IGNORETAGS=["MERROR","MPHANTOM","MALIGNGROUP","MALIGNMARK","MPRESCRIPTS","ANNOTATION","ANNOTATION-XML"],e.EMPTYTAGS=["MATH","MROW","MPADDED","MACTION","NONE","MSTYLE","SEMANTICS"],e.DISPLAYTAGS=["MROOT","MSQRT"],e.directSpeechKeys=["aria-label","exact-speech","alt"],e.hasMathTag=function(t){return!!t&&"MATH"===n.tagName(t)},e.hasLeafTag=o,e.hasIgnoreTag=function(t){return!!t&&-1!==e.IGNORETAGS.indexOf(n.tagName(t))},e.hasEmptyTag=function(t){return!!t&&-1!==e.EMPTYTAGS.indexOf(n.tagName(t))},e.hasDisplayTag=function(t){return!!t&&-1!==e.DISPLAYTAGS.indexOf(n.tagName(t))},e.isOrphanedGlyph=function(t){return!!t&&"MGLYPH"===n.tagName(t)&&!o(t.parentNode)},e.purgeNodes=function(t){const r=[];for(let o,i=0;o=t[i];i++){if(o.nodeType!==n.NodeType.ELEMENT_NODE)continue;const t=n.tagName(o);-1===e.IGNORETAGS.indexOf(t)&&(-1!==e.EMPTYTAGS.indexOf(t)&&0===o.childNodes.length||r.push(o))}return r},e.isZeroLength=function(t){if(!t)return!1;if(-1!==["negativeveryverythinmathspace","negativeverythinmathspace","negativethinmathspace","negativemediummathspace","negativethickmathspace","negativeverythickmathspace","negativeveryverythickmathspace"].indexOf(t))return!0;const e=t.match(/[0-9.]+/);return!!e&&0===parseFloat(e[0])},e.addAttributes=function(t,r){if(r.hasAttributes()){const n=r.attributes;for(let r=n.length-1;r>=0;r--){const o=n[r].name;o.match(/^ext/)&&(t.attributes[o]=n[r].value,t.nobreaking=!0),-1!==e.directSpeechKeys.indexOf(o)&&(t.attributes["ext-speech"]=n[r].value,t.nobreaking=!0),o.match(/texclass$/)&&(t.attributes.texclass=n[r].value),"href"===o&&(t.attributes.href=n[r].value,t.nobreaking=!0)}}},e.getEmbellishedInner=function t(e){return e&&e.embellished&&e.childNodes.length>0?t(e.childNodes[0]):e},e.sliceNodes=i,e.partitionNodes=function(t,e){let r=t;const n=[],o=[];let s=null;do{s=i(r,e),o.push(s.head),n.push(s.div),r=s.tail}while(s.div);return n.pop(),{rel:n,comp:o}}},6278:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.AbstractSpeechGenerator=void 0;const n=r(6828),o=r(2298),i=r(1214),s=r(9543);e.AbstractSpeechGenerator=class{constructor(){this.modality=o.addPrefix("speech"),this.rebuilt_=null,this.options_={}}getRebuilt(){return this.rebuilt_}setRebuilt(t){this.rebuilt_=t}setOptions(t){this.options_=t||{},this.modality=o.addPrefix(this.options_.modality||"speech")}getOptions(){return this.options_}start(){}end(){}generateSpeech(t,e){return this.rebuilt_||(this.rebuilt_=new i.RebuildStree(e)),(0,n.setup)(this.options_),s.computeMarkup(this.getRebuilt().xml)}}},1452:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.AdhocSpeechGenerator=void 0;const n=r(6278);class o extends n.AbstractSpeechGenerator{getSpeech(t,e){const r=this.generateSpeech(t,e);return t.setAttribute(this.modality,r),r}}e.AdhocSpeechGenerator=o},5152:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.ColorGenerator=void 0;const n=r(2298),o=r(8396),i=r(1214),s=r(1204),a=r(6278);class l extends a.AbstractSpeechGenerator{constructor(){super(...arguments),this.modality=(0,n.addPrefix)("foreground"),this.contrast=new o.ContrastPicker}static visitStree_(t,e,r){if(t.childNodes.length){if(t.contentNodes.length&&("punctuated"===t.type&&t.contentNodes.forEach((t=>r[t.id]=!0)),"implicit"!==t.role&&e.push(t.contentNodes.map((t=>t.id)))),t.childNodes.length){if("implicit"===t.role){const n=[];let o=[];for(const e of t.childNodes){const t=[];l.visitStree_(e,t,r),t.length<=2&&n.push(t.shift()),o=o.concat(t)}return e.push(n),void o.forEach((t=>e.push(t)))}t.childNodes.forEach((t=>l.visitStree_(t,e,r)))}}else r[t.id]||e.push(t.id)}getSpeech(t,e){return s.getAttribute(t,this.modality)}generateSpeech(t,e){return this.getRebuilt()||this.setRebuilt(new i.RebuildStree(t)),this.colorLeaves_(t),s.getAttribute(t,this.modality)}colorLeaves_(t){const e=[];l.visitStree_(this.getRebuilt().streeRoot,e,{});for(const r of e){const e=this.contrast.generate();let n=!1;n=Array.isArray(r)?r.map((r=>this.colorLeave_(t,r,e))).reduce(((t,e)=>t||e),!1):this.colorLeave_(t,r.toString(),e),n&&this.contrast.increment()}}colorLeave_(t,e,r){const n=s.getBySemanticId(t,e);return!!n&&(n.setAttribute(this.modality,r),!0)}}e.ColorGenerator=l},6604:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.DirectSpeechGenerator=void 0;const n=r(1204),o=r(6278);class i extends o.AbstractSpeechGenerator{getSpeech(t,e){return n.getAttribute(t,this.modality)}}e.DirectSpeechGenerator=i},3123:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.DummySpeechGenerator=void 0;const n=r(6278);class o extends n.AbstractSpeechGenerator{getSpeech(t,e){return""}}e.DummySpeechGenerator=o},5858:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.NodeSpeechGenerator=void 0;const n=r(1204),o=r(4598);class i extends o.TreeSpeechGenerator{getSpeech(t,e){return super.getSpeech(t,e),n.getAttribute(t,this.modality)}}e.NodeSpeechGenerator=i},9552:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.generatorMapping_=e.generator=void 0;const n=r(1452),o=r(5152),i=r(6604),s=r(3123),a=r(5858),l=r(597),c=r(4598);e.generator=function(t){return(e.generatorMapping_[t]||e.generatorMapping_.Direct)()},e.generatorMapping_={Adhoc:()=>new n.AdhocSpeechGenerator,Color:()=>new o.ColorGenerator,Direct:()=>new i.DirectSpeechGenerator,Dummy:()=>new s.DummySpeechGenerator,Node:()=>new a.NodeSpeechGenerator,Summary:()=>new l.SummarySpeechGenerator,Tree:()=>new 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o=n.type;return-1!==e.NUMBER_PROPAGATORS_.indexOf(o)||"prefixop"===o&&"negative"===n.role&&!r.script||"prefixop"===o&&"geometry"===n.role||!("punctuated"!==o||r.enclosed&&"text"!==n.role)}function y(t,r){return t.childNodes.length?(-1!==e.NUMBER_INHIBITORS_.indexOf(t.type)&&(r.script=!0),"fenced"===t.type?(r.number=!1,r.enclosed=!0,["",r]):(m(t,r)&&(r.number=!0,r.enclosed=!1),["",r])):(m(t,r)&&(r.number=!0,r.script=!1,r.enclosed=!1),[r.number?"number":"",{number:!1,enclosed:r.enclosed,script:r.script}])}e.openingFraction=function(t){const e=p.fractionNestingDepth(t);return new Array(e).join(u.LOCALE.MESSAGES.MS.FRACTION_REPEAT)+u.LOCALE.MESSAGES.MS.FRACTION_START},e.closingFraction=function(t){const e=p.fractionNestingDepth(t);return new Array(e).join(u.LOCALE.MESSAGES.MS.FRACTION_REPEAT)+u.LOCALE.MESSAGES.MS.FRACTION_END},e.overFraction=function(t){const e=p.fractionNestingDepth(t);return new Array(e).join(u.LOCALE.MESSAGES.MS.FRACTION_REPEAT)+u.LOCALE.MESSAGES.MS.FRACTION_OVER},e.overBevelledFraction=function(t){const e=p.fractionNestingDepth(t);return new Array(e).join(u.LOCALE.MESSAGES.MS.FRACTION_REPEAT)+"\u2838"+u.LOCALE.MESSAGES.MS.FRACTION_OVER},e.nestedRadical=h,e.radicalNestingDepth=f,e.openingRadical=function(t){return h(t,u.LOCALE.MESSAGES.MS.STARTROOT)},e.closingRadical=function(t){return h(t,u.LOCALE.MESSAGES.MS.ENDROOT)},e.indexRadical=function(t){return h(t,u.LOCALE.MESSAGES.MS.ROOTINDEX)},e.enlargeFence=d,s.Grammar.getInstance().setCorrection("enlargeFence",d),e.NUMBER_PROPAGATORS_=["multirel","relseq","appl","row","line"],e.NUMBER_INHIBITORS_=["subscript","superscript","overscore","underscore"],e.checkParent_=m,e.propagateNumber=y,(0,l.register)(new c.SemanticVisitor("nemeth","number",y,{number:!0})),e.relationIterator=function(t,e){const r=t.slice(0);let s,l=!0;return s=t.length>0?i.evalXPath("../../content/*",t[0]):[],function(){const t=s.shift(),i=r.shift(),c=r[0],h=e?[n.AuditoryDescription.create({text:e},{translate:!0})]:[];if(!t)return h;const f=i?p.nestedSubSuper(i,"",{sup:u.LOCALE.MESSAGES.MS.SUPER,sub:u.LOCALE.MESSAGES.MS.SUB}):"",d=i&&"EMPTY"!==o.tagName(i)||l&&t.parentNode.parentNode&&t.parentNode.parentNode.previousSibling?[n.AuditoryDescription.create({text:"\u2800"+f},{})]:[],m=c&&"EMPTY"!==o.tagName(c)||!s.length&&t.parentNode.parentNode&&t.parentNode.parentNode.nextSibling?[n.AuditoryDescription.create({text:"\u2800"},{})]:[],y=a.default.evaluateNode(t);return l=!1,h.concat(d,y,m)}},e.implicitIterator=function(t,e){const r=t.slice(0);let s;return s=t.length>0?i.evalXPath("../../content/*",t[0]):[],function(){const t=r.shift(),i=r[0],a=s.shift(),l=e?[n.AuditoryDescription.create({text:e},{translate:!0})]:[];if(!a)return l;const c=t&&"NUMBER"===o.tagName(t),u=i&&"NUMBER"===o.tagName(i);return l.concat(c&&u&&"space"===a.getAttribute("role")?[n.AuditoryDescription.create({text:"\u2800"},{})]:[])}}},8437:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.ordinalPosition=e.vulgarFraction=e.wordCounter=e.ordinalCounter=void 0;const n=r(9536),o=r(5740),i=r(4356),s=r(4977);e.ordinalCounter=function(t,e){let r=0;return function(){return i.LOCALE.NUMBERS.numericOrdinal(++r)+" "+e}},e.wordCounter=function(t,e){let r=0;return function(){return i.LOCALE.NUMBERS.numberToOrdinal(++r,!1)+" "+e}},e.vulgarFraction=function(t){const e=(0,s.convertVulgarFraction)(t,i.LOCALE.MESSAGES.MS.FRAC_OVER);return e.convertible&&e.enumerator&&e.denominator?[new n.Span(i.LOCALE.NUMBERS.numberToWords(e.enumerator),{extid:t.childNodes[0].childNodes[0].getAttribute("extid"),separator:""}),new n.Span(i.LOCALE.NUMBERS.vulgarSep,{separator:""}),new n.Span(i.LOCALE.NUMBERS.numberToOrdinal(e.denominator,1!==e.enumerator),{extid:t.childNodes[0].childNodes[1].getAttribute("extid")})]:[new n.Span(e.content||"",{extid:t.getAttribute("extid")})]},e.ordinalPosition=function(t){const e=o.toArray(t.parentNode.childNodes);return i.LOCALE.NUMBERS.numericOrdinal(e.indexOf(t)+1).toString()}},9284:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.BrailleRules=e.OtherRules=e.PrefixRules=void 0;const n=r(1676),o=r(365),i=r(1378),s=r(6922),a=r(8437),l=r(7283);e.PrefixRules=function(){l.addStore("en.prefix.default","",{CSFordinalPosition:a.ordinalPosition})},e.OtherRules=function(){l.addStore("en.speech.chromevox","",{CTFnodeCounter:o.nodeCounter,CTFcontentIterator:o.contentIterator}),l.addStore("en.speech.emacspeak","en.speech.chromevox",{CQFvulgarFractionSmall:i.isSmallVulgarFraction,CSFvulgarFraction:a.vulgarFraction})},e.BrailleRules=function(){l.addStore("nemeth.braille.default",n.DynamicCstr.BASE_LOCALE+".speech.mathspeak",{CSFopenFraction:s.openingFraction,CSFcloseFraction:s.closingFraction,CSFoverFraction:s.overFraction,CSFoverBevFraction:s.overBevelledFraction,CSFopenRadical:s.openingRadical,CSFcloseRadical:s.closingRadical,CSFindexRadical:s.indexRadical,CSFsubscript:i.subscriptVerbose,CSFsuperscript:i.superscriptVerbose,CSFbaseline:i.baselineVerbose,CGFtensorRules:t=>i.generateTensorRules(t,!1),CTFrelationIterator:s.relationIterator,CTFimplicitIterator:s.implicitIterator})}},7599:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.init=e.INIT_=void 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n=r(7052),o=r(8290),i=r(5740),s=r(4440),a=r(6828),l=r(8496),c=r(2298),u=r(4356),p=r(2105),h=r(5656),f=r(9552),d=r(9543),m=r(8504),y=r(7730),g=r(1214),b=r(179),v=r(1204),_=r(5274);class S{constructor(t,e,r,n){this.node=t,this.generator=e,this.highlighter=r,this.modifier=!1,this.keyMapping=new Map([[l.KeyCode.UP,this.up.bind(this)],[l.KeyCode.DOWN,this.down.bind(this)],[l.KeyCode.RIGHT,this.right.bind(this)],[l.KeyCode.LEFT,this.left.bind(this)],[l.KeyCode.TAB,this.repeat.bind(this)],[l.KeyCode.DASH,this.expand.bind(this)],[l.KeyCode.SPACE,this.depth.bind(this)],[l.KeyCode.HOME,this.home.bind(this)],[l.KeyCode.X,this.summary.bind(this)],[l.KeyCode.Z,this.detail.bind(this)],[l.KeyCode.V,this.virtualize.bind(this)],[l.KeyCode.P,this.previous.bind(this)],[l.KeyCode.U,this.undo.bind(this)],[l.KeyCode.LESS,this.previousRules.bind(this)],[l.KeyCode.GREATER,this.nextRules.bind(this)]]),this.cursors=[],this.xml_=null,this.rebuilt_=null,this.focus_=null,this.active_=!1,this.node.id?this.id=this.node.id:this.node.hasAttribute(S.SRE_ID_ATTR)?this.id=this.node.getAttribute(S.SRE_ID_ATTR):(this.node.setAttribute(S.SRE_ID_ATTR,S.ID_COUNTER.toString()),this.id=S.ID_COUNTER++),this.rootNode=v.getSemanticRoot(t),this.rootId=this.rootNode.getAttribute(c.Attribute.ID),this.xmlString_=n,this.moved=b.WalkerMoves.ENTER}getXml(){return this.xml_||(this.xml_=i.parseInput(this.xmlString_)),this.xml_}getRebuilt(){return this.rebuilt_||this.rebuildStree(),this.rebuilt_}isActive(){return this.active_}activate(){this.isActive()||(this.generator.start(),this.toggleActive_())}deactivate(){this.isActive()&&(b.WalkerState.setState(this.id,this.primaryId()),this.generator.end(),this.toggleActive_())}getFocus(t=!1){return this.focus_||(this.focus_=this.singletonFocus(this.rootId)),t&&this.updateFocus(),this.focus_}setFocus(t){this.focus_=t}getDepth(){return this.levels.depth()-1}isSpeech(){return this.generator.modality===c.Attribute.SPEECH}focusDomNodes(){return this.getFocus().getDomNodes()}focusSemanticNodes(){return this.getFocus().getSemanticNodes()}speech(){const t=this.focusDomNodes();if(!t.length)return"";const e=this.specialMove();if(null!==e)return e;switch(this.moved){case b.WalkerMoves.DEPTH:return this.depth_();case b.WalkerMoves.SUMMARY:return this.summary_();case b.WalkerMoves.DETAIL:return this.detail_();default:{const e=[],r=this.focusSemanticNodes();for(let n=0,o=t.length;n0}restoreState(){if(!this.highlighter)return;const t=b.WalkerState.getState(this.id);if(!t)return;let e=this.getRebuilt().nodeDict[t];const r=[];for(;e;)r.push(e.id),e=e.parent;for(r.pop();r.length>0;){this.down();const t=r.pop(),e=this.findFocusOnLevel(t);if(!e)break;this.setFocus(e)}this.moved=b.WalkerMoves.ENTER}updateFocus(){this.setFocus(y.Focus.factory(this.getFocus().getSemanticPrimary().id.toString(),this.getFocus().getSemanticNodes().map((t=>t.id.toString())),this.getRebuilt(),this.node))}rebuildStree(){this.rebuilt_=new g.RebuildStree(this.getXml()),this.rootId=this.rebuilt_.stree.root.id.toString(),this.generator.setRebuilt(this.rebuilt_),this.skeleton=h.SemanticSkeleton.fromTree(this.rebuilt_.stree),this.skeleton.populate(),this.focus_=this.singletonFocus(this.rootId),this.levels=this.initLevels(),d.connectMactions(this.node,this.getXml(),this.rebuilt_.xml)}previousLevel(){const t=this.getFocus().getDomPrimary();return t?v.getAttribute(t,c.Attribute.PARENT):this.getFocus().getSemanticPrimary().parent.id.toString()}nextLevel(){const t=this.getFocus().getDomPrimary();let e,r;if(t){e=v.splitAttribute(v.getAttribute(t,c.Attribute.CHILDREN)),r=v.splitAttribute(v.getAttribute(t,c.Attribute.CONTENT));const n=v.getAttribute(t,c.Attribute.TYPE),o=v.getAttribute(t,c.Attribute.ROLE);return this.combineContentChildren(n,o,r,e)}const n=t=>t.id.toString(),o=this.getRebuilt().nodeDict[this.primaryId()];return e=o.childNodes.map(n),r=o.contentNodes.map(n),0===e.length?[]:this.combineContentChildren(o.type,o.role,r,e)}singletonFocus(t){this.getRebuilt();const e=this.retrieveVisuals(t);return this.focusFromId(t,e)}retrieveVisuals(t){if(!this.skeleton)return[t];const e=parseInt(t,10),r=this.skeleton.subtreeNodes(e);if(!r.length)return[t];r.unshift(e);const n={},o=[];_.updateEvaluator(this.getXml());for(const t of r)n[t]||(o.push(t.toString()),n[t]=!0,this.subtreeIds(t,n));return o}subtreeIds(t,e){const r=_.evalXPath(`//*[@data-semantic-id="${t}"]`,this.getXml());_.evalXPath("*//@data-semantic-id",r[0]).forEach((t=>e[parseInt(t.textContent,10)]=!0))}focusFromId(t,e){return y.Focus.factory(t,e,this.getRebuilt(),this.node)}summary(){return this.moved=this.isSpeech()?b.WalkerMoves.SUMMARY:b.WalkerMoves.REPEAT,this.getFocus().clone()}detail(){return this.moved=this.isSpeech()?b.WalkerMoves.DETAIL:b.WalkerMoves.REPEAT,this.getFocus().clone()}specialMove(){return null}virtualize(t){return this.cursors.push({focus:this.getFocus(),levels:this.levels,undo:t||!this.cursors.length}),this.levels=this.levels.clone(),this.getFocus().clone()}previous(){const t=this.cursors.pop();return t?(this.levels=t.levels,t.focus):this.getFocus()}undo(){let t;do{t=this.cursors.pop()}while(t&&!t.undo);return t?(this.levels=t.levels,t.focus):this.getFocus()}update(t){this.generator.setOptions(t),(0,a.setup)(t).then((()=>f.generator("Tree").getSpeech(this.node,this.getXml())))}nextRules(){const t=this.generator.getOptions();return"speech"!==t.modality?this.getFocus():(s.DOMAIN_TO_STYLES[t.domain]=t.style,t.domain="mathspeak"===t.domain?"clearspeak":"mathspeak",t.style=s.DOMAIN_TO_STYLES[t.domain],this.update(t),this.moved=b.WalkerMoves.REPEAT,this.getFocus().clone())}nextStyle(t,e){if("mathspeak"===t){const t=["default","brief","sbrief"],r=t.indexOf(e);return-1===r?e:r>=t.length-1?t[0]:t[r+1]}if("clearspeak"===t){const t=m.ClearspeakPreferences.getLocalePreferences().en;if(!t)return"default";const r=m.ClearspeakPreferences.relevantPreferences(this.getFocus().getSemanticPrimary()),n=m.ClearspeakPreferences.findPreference(e,r),o=t[r].map((function(t){return t.split("_")[1]})),i=o.indexOf(n);if(-1===i)return e;const s=i>=o.length-1?o[0]:o[i+1];return m.ClearspeakPreferences.addPreference(e,r,s)}return e}previousRules(){const t=this.generator.getOptions();return"speech"!==t.modality?this.getFocus():(t.style=this.nextStyle(t.domain,t.style),this.update(t),this.moved=b.WalkerMoves.REPEAT,this.getFocus().clone())}refocus(){let t,e=this.getFocus();for(;!e.getNodes().length;){t=this.levels.peek();const r=this.up();if(!r)break;this.setFocus(r),e=this.getFocus(!0)}this.levels.push(t),this.setFocus(e)}toggleActive_(){this.active_=!this.active_}mergePrefix_(t,e=[]){const r=this.isSpeech()?this.prefix_():"";r&&t.unshift(r);const n=this.isSpeech()?this.postfix_():"";return n&&t.push(n),o.finalize(o.merge(e.concat(t)))}prefix_(){const t=this.getFocus().getDomNodes(),e=this.getFocus().getSemanticNodes();return t[0]?v.getAttribute(t[0],c.Attribute.PREFIX):d.retrievePrefix(e[0])}postfix_(){const t=this.getFocus().getDomNodes();return t[0]?v.getAttribute(t[0],c.Attribute.POSTFIX):""}depth_(){const t=p.Grammar.getInstance().getParameter("depth");p.Grammar.getInstance().setParameter("depth",!0);const e=this.getFocus().getDomPrimary(),r=this.expandable(e)?u.LOCALE.MESSAGES.navigate.EXPANDABLE:this.collapsible(e)?u.LOCALE.MESSAGES.navigate.COLLAPSIBLE:"",i=u.LOCALE.MESSAGES.navigate.LEVEL+" "+this.getDepth(),s=this.getFocus().getSemanticNodes(),a=d.retrievePrefix(s[0]),l=[new n.AuditoryDescription({text:i,personality:{}}),new n.AuditoryDescription({text:a,personality:{}}),new n.AuditoryDescription({text:r,personality:{}})];return p.Grammar.getInstance().setParameter("depth",t),o.finalize(o.markup(l))}actionable_(t){const e=null==t?void 0:t.parentNode;return e&&this.highlighter.isMactionNode(e)?e:null}summary_(){const t=this.getFocus().getSemanticPrimary().id.toString(),e=this.getRebuilt().xml.getAttribute("id")===t?this.getRebuilt().xml:i.querySelectorAllByAttrValue(this.getRebuilt().xml,"id",t)[0],r=d.retrieveSummary(e);return this.mergePrefix_([r])}detail_(){const t=this.getFocus().getSemanticPrimary().id.toString(),e=this.getRebuilt().xml.getAttribute("id")===t?this.getRebuilt().xml:i.querySelectorAllByAttrValue(this.getRebuilt().xml,"id",t)[0],r=e.getAttribute("alternative");e.removeAttribute("alternative");const n=d.computeMarkup(e),o=this.mergePrefix_([n]);return e.setAttribute("alternative",r),o}}e.AbstractWalker=S,S.ID_COUNTER=0,S.SRE_ID_ATTR="sre-explorer-id"},162:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.DummyWalker=void 0;const n=r(3284);class o extends n.AbstractWalker{up(){return null}down(){return null}left(){return null}right(){return null}repeat(){return null}depth(){return null}home(){return null}getDepth(){return 0}initLevels(){return null}combineContentChildren(t,e,r,n){return[]}findFocusOnLevel(t){return null}}e.DummyWalker=o},7730:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.Focus=void 0;const n=r(1204);class o{constructor(t,e){this.nodes=t,this.primary=e,this.domNodes=[],this.domPrimary_=null,this.allNodes=[]}static factory(t,e,r,i){const s=t=>n.getBySemanticId(i,t),a=r.nodeDict,l=s(t),c=e.map(s),u=e.map((function(t){return a[t]})),p=new o(u,a[t]);return p.domNodes=c,p.domPrimary_=l,p.allNodes=o.generateAllVisibleNodes_(e,c,a,i),p}static generateAllVisibleNodes_(t,e,r,i){const s=t=>n.getBySemanticId(i,t);let a=[];for(let n=0,l=t.length;n=e.length?null:e[t]}depth(){return this.level_.length}clone(){const t=new r;return t.level_=this.level_.slice(0),t}toString(){let t="";for(let e,r=0;e=this.level_[r];r++)t+="\n"+e.map((function(t){return t.toString()}));return t}}e.Levels=r},1214:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.RebuildStree=void 0;const n=r(5740),o=r(2298),i=r(3588),s=r(6537),a=r(3308),l=r(5656),c=r(7075),u=r(4795),p=r(1204);class h{constructor(t){this.mathml=t,this.factory=new s.SemanticNodeFactory,this.nodeDict={},this.mmlRoot=p.getSemanticRoot(t),this.streeRoot=this.assembleTree(this.mmlRoot),this.stree=c.SemanticTree.fromNode(this.streeRoot,this.mathml),this.xml=this.stree.xml(),a.default.getInstance().setNodeFactory(this.factory)}static addAttributes(t,e,r){r&&1===e.childNodes.length&&e.childNodes[0].nodeType!==n.NodeType.TEXT_NODE&&u.addAttributes(t,e.childNodes[0]),u.addAttributes(t,e)}static textContent(t,e,r){if(!r&&e.textContent)return void(t.textContent=e.textContent);const n=p.splitAttribute(p.getAttribute(e,o.Attribute.OPERATOR));n.length>1&&(t.textContent=n[1])}static isPunctuated(t){return!l.SemanticSkeleton.simpleCollapseStructure(t)&&t[1]&&l.SemanticSkeleton.contentCollapseStructure(t[1])}getTree(){return this.stree}assembleTree(t){const 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e.updateContent((0,i.invisibleComma)()),e.role="dummy",e}makePunctuated(t,e,r){const n=this.createNode(e[0]);n.type="punctuated",n.embellished=t.embellished,n.fencePointer=t.fencePointer,n.role=r;const o=e.splice(1,1)[0].slice(1);n.contentNodes=o.map(this.makePunctuation.bind(this)),this.collapsedChildren_(e)}makeEmpty(t,e,r){const n=this.createNode(e);n.type="empty",n.embellished=t.embellished,n.fencePointer=t.fencePointer,n.role=r}makeIndex(t,e,r){if(h.isPunctuated(e))return this.makePunctuated(t,e,r),void(e=e[0]);l.SemanticSkeleton.simpleCollapseStructure(e)&&!this.nodeDict[e.toString()]&&this.makeEmpty(t,e,r)}postProcess(t,e){const r=l.SemanticSkeleton.fromString(e).array;if("subsup"===t.type){const e=this.createNode(r[1][0]);return e.type="subscript",e.role="subsup",t.type="superscript",e.embellished=t.embellished,e.fencePointer=t.fencePointer,this.makeIndex(t,r[1][2],"rightsub"),this.makeIndex(t,r[2],"rightsuper"),this.collapsedChildren_(r),t}if("subscript"===t.type)return this.makeIndex(t,r[2],"rightsub"),this.collapsedChildren_(r),t;if("superscript"===t.type)return this.makeIndex(t,r[2],"rightsuper"),this.collapsedChildren_(r),t;if("tensor"===t.type)return this.makeIndex(t,r[2],"leftsub"),this.makeIndex(t,r[3],"leftsuper"),this.makeIndex(t,r[4],"rightsub"),this.makeIndex(t,r[5],"rightsuper"),this.collapsedChildren_(r),t;if("punctuated"===t.type){if(h.isPunctuated(r)){const e=r.splice(1,1)[0].slice(1);t.contentNodes=e.map(this.makePunctuation.bind(this))}return t}if("underover"===t.type){const e=this.createNode(r[1][0]);return"overaccent"===t.childNodes[1].role?(e.type="overscore",t.type="underscore"):(e.type="underscore",t.type="overscore"),e.role="underover",e.embellished=t.embellished,e.fencePointer=t.fencePointer,this.collapsedChildren_(r),t}return t}createNode(t){const e=this.factory.makeNode(t);return this.nodeDict[t.toString()]=e,e}collapsedChildren_(t){const e=t=>{const r=this.nodeDict[t[0]];r.childNodes=[];for(let n=1,o=t.length;ne.getSemanticPrimary().id===t))}}e.SemanticWalker=i},9806:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.SyntaxWalker=void 0;const n=r(707),o=r(3284),i=r(9797);class s extends o.AbstractWalker{constructor(t,e,r,n){super(t,e,r,n),this.node=t,this.generator=e,this.highlighter=r,this.levels=null,this.restoreState()}initLevels(){const t=new i.Levels;return t.push([this.primaryId()]),t}up(){super.up();const t=this.previousLevel();return t?(this.levels.pop(),this.singletonFocus(t)):null}down(){super.down();const t=this.nextLevel();if(0===t.length)return null;const e=this.singletonFocus(t[0]);return e&&this.levels.push(t),e}combineContentChildren(t,e,r,o){switch(t){case"relseq":case"infixop":case"multirel":return(0,n.interleaveLists)(o,r);case"prefixop":return r.concat(o);case"postfixop":return o.concat(r);case"matrix":case"vector":case"fenced":return o.unshift(r[0]),o.push(r[1]),o;case"cases":return o.unshift(r[0]),o;case"punctuated":return"text"===e?(0,n.interleaveLists)(o,r):o;case"appl":return[o[0],r[0],o[1]];case"root":return[o[1],o[0]];default:return o}}left(){super.left();const t=this.levels.indexOf(this.primaryId());if(null===t)return null;const e=this.levels.get(t-1);return e?this.singletonFocus(e):null}right(){super.right();const t=this.levels.indexOf(this.primaryId());if(null===t)return null;const e=this.levels.get(t+1);return e?this.singletonFocus(e):null}findFocusOnLevel(t){return this.singletonFocus(t.toString())}focusDomNodes(){return[this.getFocus().getDomPrimary()]}focusSemanticNodes(){return[this.getFocus().getSemanticPrimary()]}}e.SyntaxWalker=s},1799:function(t,e,r){Object.defineProperty(e,"__esModule",{value:!0}),e.TableWalker=void 0;const n=r(5740),o=r(8496),i=r(9806),s=r(179);class a extends i.SyntaxWalker{constructor(t,e,r,n){super(t,e,r,n),this.node=t,this.generator=e,this.highlighter=r,this.firstJump=null,this.key_=null,this.row_=0,this.currentTable_=null,this.keyMapping.set(o.KeyCode.ZERO,this.jumpCell.bind(this)),this.keyMapping.set(o.KeyCode.ONE,this.jumpCell.bind(this)),this.keyMapping.set(o.KeyCode.TWO,this.jumpCell.bind(this)),this.keyMapping.set(o.KeyCode.THREE,this.jumpCell.bind(this)),this.keyMapping.set(o.KeyCode.FOUR,this.jumpCell.bind(this)),this.keyMapping.set(o.KeyCode.FIVE,this.jumpCell.bind(this)),this.keyMapping.set(o.KeyCode.SIX,this.jumpCell.bind(this)),this.keyMapping.set(o.KeyCode.SEVEN,this.jumpCell.bind(this)),this.keyMapping.set(o.KeyCode.EIGHT,this.jumpCell.bind(this)),this.keyMapping.set(o.KeyCode.NINE,this.jumpCell.bind(this))}move(t){this.key_=t;const e=super.move(t);return this.modifier=!1,e}up(){return this.moved=s.WalkerMoves.UP,this.eligibleCell_()?this.verticalMove_(!1):super.up()}down(){return this.moved=s.WalkerMoves.DOWN,this.eligibleCell_()?this.verticalMove_(!0):super.down()}jumpCell(){if(!this.isInTable_()||null===this.key_)return this.getFocus();if(this.moved===s.WalkerMoves.ROW){this.moved=s.WalkerMoves.CELL;const t=this.key_-o.KeyCode.ZERO;return this.isLegalJump_(this.row_,t)?this.jumpCell_(this.row_,t):this.getFocus()}const t=this.key_-o.KeyCode.ZERO;return t>this.currentTable_.childNodes.length?this.getFocus():(this.row_=t,this.moved=s.WalkerMoves.ROW,this.getFocus().clone())}undo(){const t=super.undo();return t===this.firstJump&&(this.firstJump=null),t}eligibleCell_(){const t=this.getFocus().getSemanticPrimary();return this.modifier&&"cell"===t.type&&-1!==a.ELIGIBLE_CELL_ROLES.indexOf(t.role)}verticalMove_(t){const e=this.previousLevel();if(!e)return null;const r=this.getFocus(),n=this.levels.indexOf(this.primaryId()),o=this.levels.pop(),i=this.levels.indexOf(e),s=this.levels.get(t?i+1:i-1);if(!s)return this.levels.push(o),null;this.setFocus(this.singletonFocus(s));const a=this.nextLevel();return a[n]?(this.levels.push(a),this.singletonFocus(a[n])):(this.setFocus(r),this.levels.push(o),null)}jumpCell_(t,e){this.firstJump?this.virtualize(!1):(this.firstJump=this.getFocus(),this.virtualize(!0));const r=this.currentTable_.id.toString();let n;do{n=this.levels.pop()}while(-1===n.indexOf(r));this.levels.push(n),this.setFocus(this.singletonFocus(r)),this.levels.push(this.nextLevel());const o=this.currentTable_.childNodes[t-1];return this.setFocus(this.singletonFocus(o.id.toString())),this.levels.push(this.nextLevel()),this.singletonFocus(o.childNodes[e-1].id.toString())}isLegalJump_(t,e){const r=n.querySelectorAllByAttrValue(this.getRebuilt().xml,"id",this.currentTable_.id.toString())[0];if(!r||r.hasAttribute("alternative"))return!1;const o=this.currentTable_.childNodes[t-1];if(!o)return!1;const i=n.querySelectorAllByAttrValue(r,"id",o.id.toString())[0];return!(!i||i.hasAttribute("alternative"))&&!(!o||!o.childNodes[e-1])}isInTable_(){let t=this.getFocus().getSemanticPrimary();for(;t;){if(-1!==a.ELIGIBLE_TABLE_TYPES.indexOf(t.type))return this.currentTable_=t,!0;t=t.parent}return!1}}e.TableWalker=a,a.ELIGIBLE_CELL_ROLES=["determinant","rowvector","binomial","squarematrix","multiline","matrix","vector","cases","table"],a.ELIGIBLE_TABLE_TYPES=["multiline","matrix","vector","cases","table"]},179:function(t,e){Object.defineProperty(e,"__esModule",{value:!0}),e.WalkerState=e.WalkerMoves=void 0,function(t){t.UP="up",t.DOWN="down",t.LEFT="left",t.RIGHT="right",t.REPEAT="repeat",t.DEPTH="depth",t.ENTER="enter",t.EXPAND="expand",t.HOME="home",t.SUMMARY="summary",t.DETAIL="detail",t.ROW="row",t.CELL="cell"}(e.WalkerMoves||(e.WalkerMoves={}));class r{static resetState(t){delete r.STATE[t]}static setState(t,e){r.STATE[t]=e}static getState(t){return 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dn=(0,xt.selectOptionsFromKeys)(MathJax.config.chtml||{},xr.TeXFont.OPTIONS);(0,t.combineDefaults)(MathJax.config,"chtml",{font:new xr.TeXFont(dn)})}var mn=__webpack_require__(5865),yn=__webpack_require__(8310),gn=__webpack_require__(4001),bn=__webpack_require__(473),vn=__webpack_require__(4414);MathJax.loader&&MathJax.loader.checkVersion("ui/menu",e.VERSION,"ui"),(0,t.combineWithMathJax)({_:{ui:{menu:{MJContextMenu:mn,Menu:yn,MenuHandler:gn,MmlVisitor:bn,SelectableInfo:vn}}}}),MathJax.startup&&"undefined"!=typeof window&&MathJax.startup.extendHandler((function(t){return(0,gn.MenuHandler)(t)}),20);var _n=__webpack_require__(351);function Sn(t,e){(null==e||e>t.length)&&(e=t.length);for(var r=0,n=new Array(e);r' of an opening
+ *   tag is typed.
+ * `dontCloseTags` (default is empty tags for HTML, none for XML)
+ *   An array of tag names that should not be autoclosed.
+ * `indentTags` (default is block tags for HTML, none for XML)
+ *   An array of tag names that should, when opened, cause a
+ *   blank line to be added inside the tag, and the blank line and
+ *   closing line to be indented.
+ * `emptyTags` (default is none)
+ *   An array of XML tag names that should be autoclosed with '/>'.
+ *
+ * See demos/closetag.html for a usage example.
+ */
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"), require("../fold/xml-fold"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror", "../fold/xml-fold"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  CodeMirror.defineOption("autoCloseTags", false, function(cm, val, old) {
+    if (old != CodeMirror.Init && old)
+      cm.removeKeyMap("autoCloseTags");
+    if (!val) return;
+    var map = {name: "autoCloseTags"};
+    if (typeof val != "object" || val.whenClosing !== false)
+      map["'/'"] = function(cm) { return autoCloseSlash(cm); };
+    if (typeof val != "object" || val.whenOpening !== false)
+      map["'>'"] = function(cm) { return autoCloseGT(cm); };
+    cm.addKeyMap(map);
+  });
+
+  var htmlDontClose = ["area", "base", "br", "col", "command", "embed", "hr", "img", "input", "keygen", "link", "meta", "param",
+                       "source", "track", "wbr"];
+  var htmlIndent = ["applet", "blockquote", "body", "button", "div", "dl", "fieldset", "form", "frameset", "h1", "h2", "h3", "h4",
+                    "h5", "h6", "head", "html", "iframe", "layer", "legend", "object", "ol", "p", "select", "table", "ul"];
+
+  function autoCloseGT(cm) {
+    if (cm.getOption("disableInput")) return CodeMirror.Pass;
+    var ranges = cm.listSelections(), replacements = [];
+    var opt = cm.getOption("autoCloseTags");
+    for (var i = 0; i < ranges.length; i++) {
+      if (!ranges[i].empty()) return CodeMirror.Pass;
+      var pos = ranges[i].head, tok = cm.getTokenAt(pos);
+      var inner = CodeMirror.innerMode(cm.getMode(), tok.state), state = inner.state;
+      var tagInfo = inner.mode.xmlCurrentTag && inner.mode.xmlCurrentTag(state)
+      var tagName = tagInfo && tagInfo.name
+      if (!tagName) return CodeMirror.Pass
+
+      var html = inner.mode.configuration == "html";
+      var dontCloseTags = (typeof opt == "object" && opt.dontCloseTags) || (html && htmlDontClose);
+      var indentTags = (typeof opt == "object" && opt.indentTags) || (html && htmlIndent);
+
+      if (tok.end > pos.ch) tagName = tagName.slice(0, tagName.length - tok.end + pos.ch);
+      var lowerTagName = tagName.toLowerCase();
+      // Don't process the '>' at the end of an end-tag or self-closing tag
+      if (!tagName ||
+          tok.type == "string" && (tok.end != pos.ch || !/[\"\']/.test(tok.string.charAt(tok.string.length - 1)) || tok.string.length == 1) ||
+          tok.type == "tag" && tagInfo.close ||
+          tok.string.indexOf("/") == (pos.ch - tok.start - 1) || // match something like 
+          dontCloseTags && indexOf(dontCloseTags, lowerTagName) > -1 ||
+          closingTagExists(cm, inner.mode.xmlCurrentContext && inner.mode.xmlCurrentContext(state) || [], tagName, pos, true))
+        return CodeMirror.Pass;
+
+      var emptyTags = typeof opt == "object" && opt.emptyTags;
+      if (emptyTags && indexOf(emptyTags, tagName) > -1) {
+        replacements[i] = { text: "/>", newPos: CodeMirror.Pos(pos.line, pos.ch + 2) };
+        continue;
+      }
+
+      var indent = indentTags && indexOf(indentTags, lowerTagName) > -1;
+      replacements[i] = {indent: indent,
+                         text: ">" + (indent ? "\n\n" : "") + "",
+                         newPos: indent ? CodeMirror.Pos(pos.line + 1, 0) : CodeMirror.Pos(pos.line, pos.ch + 1)};
+    }
+
+    var dontIndentOnAutoClose = (typeof opt == "object" && opt.dontIndentOnAutoClose);
+    for (var i = ranges.length - 1; i >= 0; i--) {
+      var info = replacements[i];
+      cm.replaceRange(info.text, ranges[i].head, ranges[i].anchor, "+insert");
+      var sel = cm.listSelections().slice(0);
+      sel[i] = {head: info.newPos, anchor: info.newPos};
+      cm.setSelections(sel);
+      if (!dontIndentOnAutoClose && info.indent) {
+        cm.indentLine(info.newPos.line, null, true);
+        cm.indentLine(info.newPos.line + 1, null, true);
+      }
+    }
+  }
+
+  function autoCloseCurrent(cm, typingSlash) {
+    var ranges = cm.listSelections(), replacements = [];
+    var head = typingSlash ? "/" : "") replacement += ">";
+      replacements[i] = replacement;
+    }
+    cm.replaceSelections(replacements);
+    ranges = cm.listSelections();
+    if (!dontIndentOnAutoClose) {
+        for (var i = 0; i < ranges.length; i++)
+            if (i == ranges.length - 1 || ranges[i].head.line < ranges[i + 1].head.line)
+                cm.indentLine(ranges[i].head.line);
+    }
+  }
+
+  function autoCloseSlash(cm) {
+    if (cm.getOption("disableInput")) return CodeMirror.Pass;
+    return autoCloseCurrent(cm, true);
+  }
+
+  CodeMirror.commands.closeTag = function(cm) { return autoCloseCurrent(cm); };
+
+  function indexOf(collection, elt) {
+    if (collection.indexOf) return collection.indexOf(elt);
+    for (var i = 0, e = collection.length; i < e; ++i)
+      if (collection[i] == elt) return i;
+    return -1;
+  }
+
+  // If xml-fold is loaded, we use its functionality to try and verify
+  // whether a given tag is actually unclosed.
+  function closingTagExists(cm, context, tagName, pos, newTag) {
+    if (!CodeMirror.scanForClosingTag) return false;
+    var end = Math.min(cm.lastLine() + 1, pos.line + 500);
+    var nextClose = CodeMirror.scanForClosingTag(cm, pos, null, end);
+    if (!nextClose || nextClose.tag != tagName) return false;
+    // If the immediate wrapping context contains onCx instances of
+    // the same tag, a closing tag only exists if there are at least
+    // that many closing tags of that type following.
+    var onCx = newTag ? 1 : 0
+    for (var i = context.length - 1; i >= 0; i--) {
+      if (context[i] == tagName) ++onCx
+      else break
+    }
+    pos = nextClose.to;
+    for (var i = 1; i < onCx; i++) {
+      var next = CodeMirror.scanForClosingTag(cm, pos, null, end);
+      if (!next || next.tag != tagName) return false;
+      pos = next.to;
+    }
+    return true;
+  }
+});
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_addon_hint_show-hint.css b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_addon_hint_show-hint.css
new file mode 100644
index 0000000..5617ccc
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_addon_hint_show-hint.css
@@ -0,0 +1,36 @@
+.CodeMirror-hints {
+  position: absolute;
+  z-index: 10;
+  overflow: hidden;
+  list-style: none;
+
+  margin: 0;
+  padding: 2px;
+
+  -webkit-box-shadow: 2px 3px 5px rgba(0,0,0,.2);
+  -moz-box-shadow: 2px 3px 5px rgba(0,0,0,.2);
+  box-shadow: 2px 3px 5px rgba(0,0,0,.2);
+  border-radius: 3px;
+  border: 1px solid silver;
+
+  background: white;
+  font-size: 90%;
+  font-family: monospace;
+
+  max-height: 20em;
+  overflow-y: auto;
+}
+
+.CodeMirror-hint {
+  margin: 0;
+  padding: 0 4px;
+  border-radius: 2px;
+  white-space: pre;
+  color: black;
+  cursor: pointer;
+}
+
+li.CodeMirror-hint-active {
+  background: #08f;
+  color: white;
+}
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_addon_hint_show-hint.js b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_addon_hint_show-hint.js
new file mode 100644
index 0000000..2be2c71
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_addon_hint_show-hint.js
@@ -0,0 +1,529 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+// declare global: DOMRect
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  var HINT_ELEMENT_CLASS        = "CodeMirror-hint";
+  var ACTIVE_HINT_ELEMENT_CLASS = "CodeMirror-hint-active";
+
+  // This is the old interface, kept around for now to stay
+  // backwards-compatible.
+  CodeMirror.showHint = function(cm, getHints, options) {
+    if (!getHints) return cm.showHint(options);
+    if (options && options.async) getHints.async = true;
+    var newOpts = {hint: getHints};
+    if (options) for (var prop in options) newOpts[prop] = options[prop];
+    return cm.showHint(newOpts);
+  };
+
+  CodeMirror.defineExtension("showHint", function(options) {
+    options = parseOptions(this, this.getCursor("start"), options);
+    var selections = this.listSelections()
+    if (selections.length > 1) return;
+    // By default, don't allow completion when something is selected.
+    // A hint function can have a `supportsSelection` property to
+    // indicate that it can handle selections.
+    if (this.somethingSelected()) {
+      if (!options.hint.supportsSelection) return;
+      // Don't try with cross-line selections
+      for (var i = 0; i < selections.length; i++)
+        if (selections[i].head.line != selections[i].anchor.line) return;
+    }
+
+    if (this.state.completionActive) this.state.completionActive.close();
+    var completion = this.state.completionActive = new Completion(this, options);
+    if (!completion.options.hint) return;
+
+    CodeMirror.signal(this, "startCompletion", this);
+    completion.update(true);
+  });
+
+  CodeMirror.defineExtension("closeHint", function() {
+    if (this.state.completionActive) this.state.completionActive.close()
+  })
+
+  function Completion(cm, options) {
+    this.cm = cm;
+    this.options = options;
+    this.widget = null;
+    this.debounce = 0;
+    this.tick = 0;
+    this.startPos = this.cm.getCursor("start");
+    this.startLen = this.cm.getLine(this.startPos.line).length - this.cm.getSelection().length;
+
+    if (this.options.updateOnCursorActivity) {
+      var self = this;
+      cm.on("cursorActivity", this.activityFunc = function() { self.cursorActivity(); });
+    }
+  }
+
+  var requestAnimationFrame = window.requestAnimationFrame || function(fn) {
+    return setTimeout(fn, 1000/60);
+  };
+  var cancelAnimationFrame = window.cancelAnimationFrame || clearTimeout;
+
+  Completion.prototype = {
+    close: function() {
+      if (!this.active()) return;
+      this.cm.state.completionActive = null;
+      this.tick = null;
+      if (this.options.updateOnCursorActivity) {
+        this.cm.off("cursorActivity", this.activityFunc);
+      }
+
+      if (this.widget && this.data) CodeMirror.signal(this.data, "close");
+      if (this.widget) this.widget.close();
+      CodeMirror.signal(this.cm, "endCompletion", this.cm);
+    },
+
+    active: function() {
+      return this.cm.state.completionActive == this;
+    },
+
+    pick: function(data, i) {
+      var completion = data.list[i], self = this;
+      this.cm.operation(function() {
+        if (completion.hint)
+          completion.hint(self.cm, data, completion);
+        else
+          self.cm.replaceRange(getText(completion), completion.from || data.from,
+                               completion.to || data.to, "complete");
+        CodeMirror.signal(data, "pick", completion);
+        self.cm.scrollIntoView();
+      });
+      if (this.options.closeOnPick) {
+        this.close();
+      }
+    },
+
+    cursorActivity: function() {
+      if (this.debounce) {
+        cancelAnimationFrame(this.debounce);
+        this.debounce = 0;
+      }
+
+      var identStart = this.startPos;
+      if(this.data) {
+        identStart = this.data.from;
+      }
+
+      var pos = this.cm.getCursor(), line = this.cm.getLine(pos.line);
+      if (pos.line != this.startPos.line || line.length - pos.ch != this.startLen - this.startPos.ch ||
+          pos.ch < identStart.ch || this.cm.somethingSelected() ||
+          (!pos.ch || this.options.closeCharacters.test(line.charAt(pos.ch - 1)))) {
+        this.close();
+      } else {
+        var self = this;
+        this.debounce = requestAnimationFrame(function() {self.update();});
+        if (this.widget) this.widget.disable();
+      }
+    },
+
+    update: function(first) {
+      if (this.tick == null) return
+      var self = this, myTick = ++this.tick
+      fetchHints(this.options.hint, this.cm, this.options, function(data) {
+        if (self.tick == myTick) self.finishUpdate(data, first)
+      })
+    },
+
+    finishUpdate: function(data, first) {
+      if (this.data) CodeMirror.signal(this.data, "update");
+
+      var picked = (this.widget && this.widget.picked) || (first && this.options.completeSingle);
+      if (this.widget) this.widget.close();
+
+      this.data = data;
+
+      if (data && data.list.length) {
+        if (picked && data.list.length == 1) {
+          this.pick(data, 0);
+        } else {
+          this.widget = new Widget(this, data);
+          CodeMirror.signal(data, "shown");
+        }
+      }
+    }
+  };
+
+  function parseOptions(cm, pos, options) {
+    var editor = cm.options.hintOptions;
+    var out = {};
+    for (var prop in defaultOptions) out[prop] = defaultOptions[prop];
+    if (editor) for (var prop in editor)
+      if (editor[prop] !== undefined) out[prop] = editor[prop];
+    if (options) for (var prop in options)
+      if (options[prop] !== undefined) out[prop] = options[prop];
+    if (out.hint.resolve) out.hint = out.hint.resolve(cm, pos)
+    return out;
+  }
+
+  function getText(completion) {
+    if (typeof completion == "string") return completion;
+    else return completion.text;
+  }
+
+  function buildKeyMap(completion, handle) {
+    var baseMap = {
+      Up: function() {handle.moveFocus(-1);},
+      Down: function() {handle.moveFocus(1);},
+      PageUp: function() {handle.moveFocus(-handle.menuSize() + 1, true);},
+      PageDown: function() {handle.moveFocus(handle.menuSize() - 1, true);},
+      Home: function() {handle.setFocus(0);},
+      End: function() {handle.setFocus(handle.length - 1);},
+      Enter: handle.pick,
+      Tab: handle.pick,
+      Esc: handle.close
+    };
+
+    var mac = /Mac/.test(navigator.platform);
+
+    if (mac) {
+      baseMap["Ctrl-P"] = function() {handle.moveFocus(-1);};
+      baseMap["Ctrl-N"] = function() {handle.moveFocus(1);};
+    }
+
+    var custom = completion.options.customKeys;
+    var ourMap = custom ? {} : baseMap;
+    function addBinding(key, val) {
+      var bound;
+      if (typeof val != "string")
+        bound = function(cm) { return val(cm, handle); };
+      // This mechanism is deprecated
+      else if (baseMap.hasOwnProperty(val))
+        bound = baseMap[val];
+      else
+        bound = val;
+      ourMap[key] = bound;
+    }
+    if (custom)
+      for (var key in custom) if (custom.hasOwnProperty(key))
+        addBinding(key, custom[key]);
+    var extra = completion.options.extraKeys;
+    if (extra)
+      for (var key in extra) if (extra.hasOwnProperty(key))
+        addBinding(key, extra[key]);
+    return ourMap;
+  }
+
+  function getHintElement(hintsElement, el) {
+    while (el && el != hintsElement) {
+      if (el.nodeName.toUpperCase() === "LI" && el.parentNode == hintsElement) return el;
+      el = el.parentNode;
+    }
+  }
+
+  function Widget(completion, data) {
+    this.id = "cm-complete-" + Math.floor(Math.random(1e6))
+    this.completion = completion;
+    this.data = data;
+    this.picked = false;
+    var widget = this, cm = completion.cm;
+    var ownerDocument = cm.getInputField().ownerDocument;
+    var parentWindow = ownerDocument.defaultView || ownerDocument.parentWindow;
+
+    var hints = this.hints = ownerDocument.createElement("ul");
+    hints.setAttribute("role", "listbox")
+    hints.setAttribute("aria-expanded", "true")
+    hints.id = this.id
+    var theme = completion.cm.options.theme;
+    hints.className = "CodeMirror-hints " + theme;
+    this.selectedHint = data.selectedHint || 0;
+
+    var completions = data.list;
+    for (var i = 0; i < completions.length; ++i) {
+      var elt = hints.appendChild(ownerDocument.createElement("li")), cur = completions[i];
+      var className = HINT_ELEMENT_CLASS + (i != this.selectedHint ? "" : " " + ACTIVE_HINT_ELEMENT_CLASS);
+      if (cur.className != null) className = cur.className + " " + className;
+      elt.className = className;
+      if (i == this.selectedHint) elt.setAttribute("aria-selected", "true")
+      elt.id = this.id + "-" + i
+      elt.setAttribute("role", "option")
+      if (cur.render) cur.render(elt, data, cur);
+      else elt.appendChild(ownerDocument.createTextNode(cur.displayText || getText(cur)));
+      elt.hintId = i;
+    }
+
+    var container = completion.options.container || ownerDocument.body;
+    var pos = cm.cursorCoords(completion.options.alignWithWord ? data.from : null);
+    var left = pos.left, top = pos.bottom, below = true;
+    var offsetLeft = 0, offsetTop = 0;
+    if (container !== ownerDocument.body) {
+      // We offset the cursor position because left and top are relative to the offsetParent's top left corner.
+      var isContainerPositioned = ['absolute', 'relative', 'fixed'].indexOf(parentWindow.getComputedStyle(container).position) !== -1;
+      var offsetParent = isContainerPositioned ? container : container.offsetParent;
+      var offsetParentPosition = offsetParent.getBoundingClientRect();
+      var bodyPosition = ownerDocument.body.getBoundingClientRect();
+      offsetLeft = (offsetParentPosition.left - bodyPosition.left - offsetParent.scrollLeft);
+      offsetTop = (offsetParentPosition.top - bodyPosition.top - offsetParent.scrollTop);
+    }
+    hints.style.left = (left - offsetLeft) + "px";
+    hints.style.top = (top - offsetTop) + "px";
+
+    // If we're at the edge of the screen, then we want the menu to appear on the left of the cursor.
+    var winW = parentWindow.innerWidth || Math.max(ownerDocument.body.offsetWidth, ownerDocument.documentElement.offsetWidth);
+    var winH = parentWindow.innerHeight || Math.max(ownerDocument.body.offsetHeight, ownerDocument.documentElement.offsetHeight);
+    container.appendChild(hints);
+    cm.getInputField().setAttribute("aria-autocomplete", "list")
+    cm.getInputField().setAttribute("aria-owns", this.id)
+    cm.getInputField().setAttribute("aria-activedescendant", this.id + "-" + this.selectedHint)
+
+    var box = completion.options.moveOnOverlap ? hints.getBoundingClientRect() : new DOMRect();
+    var scrolls = completion.options.paddingForScrollbar ? hints.scrollHeight > hints.clientHeight + 1 : false;
+
+    // Compute in the timeout to avoid reflow on init
+    var startScroll;
+    setTimeout(function() { startScroll = cm.getScrollInfo(); });
+
+    var overlapY = box.bottom - winH;
+    if (overlapY > 0) {
+      var height = box.bottom - box.top, curTop = pos.top - (pos.bottom - box.top);
+      if (curTop - height > 0) { // Fits above cursor
+        hints.style.top = (top = pos.top - height - offsetTop) + "px";
+        below = false;
+      } else if (height > winH) {
+        hints.style.height = (winH - 5) + "px";
+        hints.style.top = (top = pos.bottom - box.top - offsetTop) + "px";
+        var cursor = cm.getCursor();
+        if (data.from.ch != cursor.ch) {
+          pos = cm.cursorCoords(cursor);
+          hints.style.left = (left = pos.left - offsetLeft) + "px";
+          box = hints.getBoundingClientRect();
+        }
+      }
+    }
+    var overlapX = box.right - winW;
+    if (scrolls) overlapX += cm.display.nativeBarWidth;
+    if (overlapX > 0) {
+      if (box.right - box.left > winW) {
+        hints.style.width = (winW - 5) + "px";
+        overlapX -= (box.right - box.left) - winW;
+      }
+      hints.style.left = (left = pos.left - overlapX - offsetLeft) + "px";
+    }
+    if (scrolls) for (var node = hints.firstChild; node; node = node.nextSibling)
+      node.style.paddingRight = cm.display.nativeBarWidth + "px"
+
+    cm.addKeyMap(this.keyMap = buildKeyMap(completion, {
+      moveFocus: function(n, avoidWrap) { widget.changeActive(widget.selectedHint + n, avoidWrap); },
+      setFocus: function(n) { widget.changeActive(n); },
+      menuSize: function() { return widget.screenAmount(); },
+      length: completions.length,
+      close: function() { completion.close(); },
+      pick: function() { widget.pick(); },
+      data: data
+    }));
+
+    if (completion.options.closeOnUnfocus) {
+      var closingOnBlur;
+      cm.on("blur", this.onBlur = function() { closingOnBlur = setTimeout(function() { completion.close(); }, 100); });
+      cm.on("focus", this.onFocus = function() { clearTimeout(closingOnBlur); });
+    }
+
+    cm.on("scroll", this.onScroll = function() {
+      var curScroll = cm.getScrollInfo(), editor = cm.getWrapperElement().getBoundingClientRect();
+      if (!startScroll) startScroll = cm.getScrollInfo();
+      var newTop = top + startScroll.top - curScroll.top;
+      var point = newTop - (parentWindow.pageYOffset || (ownerDocument.documentElement || ownerDocument.body).scrollTop);
+      if (!below) point += hints.offsetHeight;
+      if (point <= editor.top || point >= editor.bottom) return completion.close();
+      hints.style.top = newTop + "px";
+      hints.style.left = (left + startScroll.left - curScroll.left) + "px";
+    });
+
+    CodeMirror.on(hints, "dblclick", function(e) {
+      var t = getHintElement(hints, e.target || e.srcElement);
+      if (t && t.hintId != null) {widget.changeActive(t.hintId); widget.pick();}
+    });
+
+    CodeMirror.on(hints, "click", function(e) {
+      var t = getHintElement(hints, e.target || e.srcElement);
+      if (t && t.hintId != null) {
+        widget.changeActive(t.hintId);
+        if (completion.options.completeOnSingleClick) widget.pick();
+      }
+    });
+
+    CodeMirror.on(hints, "mousedown", function() {
+      setTimeout(function(){cm.focus();}, 20);
+    });
+
+    // The first hint doesn't need to be scrolled to on init
+    var selectedHintRange = this.getSelectedHintRange();
+    if (selectedHintRange.from !== 0 || selectedHintRange.to !== 0) {
+      this.scrollToActive();
+    }
+
+    CodeMirror.signal(data, "select", completions[this.selectedHint], hints.childNodes[this.selectedHint]);
+    return true;
+  }
+
+  Widget.prototype = {
+    close: function() {
+      if (this.completion.widget != this) return;
+      this.completion.widget = null;
+      if (this.hints.parentNode) this.hints.parentNode.removeChild(this.hints);
+      this.completion.cm.removeKeyMap(this.keyMap);
+      var input = this.completion.cm.getInputField()
+      input.removeAttribute("aria-activedescendant")
+      input.removeAttribute("aria-owns")
+
+      var cm = this.completion.cm;
+      if (this.completion.options.closeOnUnfocus) {
+        cm.off("blur", this.onBlur);
+        cm.off("focus", this.onFocus);
+      }
+      cm.off("scroll", this.onScroll);
+    },
+
+    disable: function() {
+      this.completion.cm.removeKeyMap(this.keyMap);
+      var widget = this;
+      this.keyMap = {Enter: function() { widget.picked = true; }};
+      this.completion.cm.addKeyMap(this.keyMap);
+    },
+
+    pick: function() {
+      this.completion.pick(this.data, this.selectedHint);
+    },
+
+    changeActive: function(i, avoidWrap) {
+      if (i >= this.data.list.length)
+        i = avoidWrap ? this.data.list.length - 1 : 0;
+      else if (i < 0)
+        i = avoidWrap ? 0  : this.data.list.length - 1;
+      if (this.selectedHint == i) return;
+      var node = this.hints.childNodes[this.selectedHint];
+      if (node) {
+        node.className = node.className.replace(" " + ACTIVE_HINT_ELEMENT_CLASS, "");
+        node.removeAttribute("aria-selected")
+      }
+      node = this.hints.childNodes[this.selectedHint = i];
+      node.className += " " + ACTIVE_HINT_ELEMENT_CLASS;
+      node.setAttribute("aria-selected", "true")
+      this.completion.cm.getInputField().setAttribute("aria-activedescendant", node.id)
+      this.scrollToActive()
+      CodeMirror.signal(this.data, "select", this.data.list[this.selectedHint], node);
+    },
+
+    scrollToActive: function() {
+      var selectedHintRange = this.getSelectedHintRange();
+      var node1 = this.hints.childNodes[selectedHintRange.from];
+      var node2 = this.hints.childNodes[selectedHintRange.to];
+      var firstNode = this.hints.firstChild;
+      if (node1.offsetTop < this.hints.scrollTop)
+        this.hints.scrollTop = node1.offsetTop - firstNode.offsetTop;
+      else if (node2.offsetTop + node2.offsetHeight > this.hints.scrollTop + this.hints.clientHeight)
+        this.hints.scrollTop = node2.offsetTop + node2.offsetHeight - this.hints.clientHeight + firstNode.offsetTop;
+    },
+
+    screenAmount: function() {
+      return Math.floor(this.hints.clientHeight / this.hints.firstChild.offsetHeight) || 1;
+    },
+
+    getSelectedHintRange: function() {
+      var margin = this.completion.options.scrollMargin || 0;
+      return {
+        from: Math.max(0, this.selectedHint - margin),
+        to: Math.min(this.data.list.length - 1, this.selectedHint + margin),
+      };
+    }
+  };
+
+  function applicableHelpers(cm, helpers) {
+    if (!cm.somethingSelected()) return helpers
+    var result = []
+    for (var i = 0; i < helpers.length; i++)
+      if (helpers[i].supportsSelection) result.push(helpers[i])
+    return result
+  }
+
+  function fetchHints(hint, cm, options, callback) {
+    if (hint.async) {
+      hint(cm, callback, options)
+    } else {
+      var result = hint(cm, options)
+      if (result && result.then) result.then(callback)
+      else callback(result)
+    }
+  }
+
+  function resolveAutoHints(cm, pos) {
+    var helpers = cm.getHelpers(pos, "hint"), words
+    if (helpers.length) {
+      var resolved = function(cm, callback, options) {
+        var app = applicableHelpers(cm, helpers);
+        function run(i) {
+          if (i == app.length) return callback(null)
+          fetchHints(app[i], cm, options, function(result) {
+            if (result && result.list.length > 0) callback(result)
+            else run(i + 1)
+          })
+        }
+        run(0)
+      }
+      resolved.async = true
+      resolved.supportsSelection = true
+      return resolved
+    } else if (words = cm.getHelper(cm.getCursor(), "hintWords")) {
+      return function(cm) { return CodeMirror.hint.fromList(cm, {words: words}) }
+    } else if (CodeMirror.hint.anyword) {
+      return function(cm, options) { return CodeMirror.hint.anyword(cm, options) }
+    } else {
+      return function() {}
+    }
+  }
+
+  CodeMirror.registerHelper("hint", "auto", {
+    resolve: resolveAutoHints
+  });
+
+  CodeMirror.registerHelper("hint", "fromList", function(cm, options) {
+    var cur = cm.getCursor(), token = cm.getTokenAt(cur)
+    var term, from = CodeMirror.Pos(cur.line, token.start), to = cur
+    if (token.start < cur.ch && /\w/.test(token.string.charAt(cur.ch - token.start - 1))) {
+      term = token.string.substr(0, cur.ch - token.start)
+    } else {
+      term = ""
+      from = cur
+    }
+    var found = [];
+    for (var i = 0; i < options.words.length; i++) {
+      var word = options.words[i];
+      if (word.slice(0, term.length) == term)
+        found.push(word);
+    }
+
+    if (found.length) return {list: found, from: from, to: to};
+  });
+
+  CodeMirror.commands.autocomplete = CodeMirror.showHint;
+
+  var defaultOptions = {
+    hint: CodeMirror.hint.auto,
+    completeSingle: true,
+    alignWithWord: true,
+    closeCharacters: /[\s()\[\]{};:>,]/,
+    closeOnPick: true,
+    closeOnUnfocus: true,
+    updateOnCursorActivity: true,
+    completeOnSingleClick: true,
+    container: null,
+    customKeys: null,
+    extraKeys: null,
+    paddingForScrollbar: true,
+    moveOnOverlap: true,
+  };
+
+  CodeMirror.defineOption("hintOptions", null);
+});
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_addon_hint_xml-hint.js b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_addon_hint_xml-hint.js
new file mode 100644
index 0000000..2b31531
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_addon_hint_xml-hint.js
@@ -0,0 +1,132 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  var Pos = CodeMirror.Pos;
+
+  function matches(hint, typed, matchInMiddle) {
+    if (matchInMiddle) return hint.indexOf(typed) >= 0;
+    else return hint.lastIndexOf(typed, 0) == 0;
+  }
+
+  function getHints(cm, options) {
+    var tags = options && options.schemaInfo;
+    var quote = (options && options.quoteChar) || '"';
+    var matchInMiddle = options && options.matchInMiddle;
+    if (!tags) return;
+    var cur = cm.getCursor(), token = cm.getTokenAt(cur);
+    if (token.end > cur.ch) {
+      token.end = cur.ch;
+      token.string = token.string.slice(0, cur.ch - token.start);
+    }
+    var inner = CodeMirror.innerMode(cm.getMode(), token.state);
+    if (!inner.mode.xmlCurrentTag) return
+    var result = [], replaceToken = false, prefix;
+    var tag = /\btag\b/.test(token.type) && !/>$/.test(token.string);
+    var tagName = tag && /^\w/.test(token.string), tagStart;
+
+    if (tagName) {
+      var before = cm.getLine(cur.line).slice(Math.max(0, token.start - 2), token.start);
+      var tagType = /<\/$/.test(before) ? "close" : /<$/.test(before) ? "open" : null;
+      if (tagType) tagStart = token.start - (tagType == "close" ? 2 : 1);
+    } else if (tag && token.string == "<") {
+      tagType = "open";
+    } else if (tag && token.string == "");
+    } else {
+      // Attribute completion
+      var curTag = tagInfo && tags[tagInfo.name], attrs = curTag && curTag.attrs;
+      var globalAttrs = tags["!attrs"];
+      if (!attrs && !globalAttrs) return;
+      if (!attrs) {
+        attrs = globalAttrs;
+      } else if (globalAttrs) { // Combine tag-local and global attributes
+        var set = {};
+        for (var nm in globalAttrs) if (globalAttrs.hasOwnProperty(nm)) set[nm] = globalAttrs[nm];
+        for (var nm in attrs) if (attrs.hasOwnProperty(nm)) set[nm] = attrs[nm];
+        attrs = set;
+      }
+      if (token.type == "string" || token.string == "=") { // A value
+        var before = cm.getRange(Pos(cur.line, Math.max(0, cur.ch - 60)),
+                                 Pos(cur.line, token.type == "string" ? token.start : token.end));
+        var atName = before.match(/([^\s\u00a0=<>\"\']+)=$/), atValues;
+        if (!atName || !attrs.hasOwnProperty(atName[1]) || !(atValues = attrs[atName[1]])) return;
+        if (typeof atValues == 'function') atValues = atValues.call(this, cm); // Functions can be used to supply values for autocomplete widget
+        if (token.type == "string") {
+          prefix = token.string;
+          var n = 0;
+          if (/['"]/.test(token.string.charAt(0))) {
+            quote = token.string.charAt(0);
+            prefix = token.string.slice(1);
+            n++;
+          }
+          var len = token.string.length;
+          if (/['"]/.test(token.string.charAt(len - 1))) {
+            quote = token.string.charAt(len - 1);
+            prefix = token.string.substr(n, len - 2);
+          }
+          if (n) { // an opening quote
+            var line = cm.getLine(cur.line);
+            if (line.length > token.end && line.charAt(token.end) == quote) token.end++; // include a closing quote
+          }
+          replaceToken = true;
+        }
+        var returnHintsFromAtValues = function(atValues) {
+          if (atValues)
+            for (var i = 0; i < atValues.length; ++i) if (!prefix || matches(atValues[i], prefix, matchInMiddle))
+              result.push(quote + atValues[i] + quote);
+          return returnHints();
+        };
+        if (atValues && atValues.then) return atValues.then(returnHintsFromAtValues);
+        return returnHintsFromAtValues(atValues);
+      } else { // An attribute name
+        if (token.type == "attribute") {
+          prefix = token.string;
+          replaceToken = true;
+        }
+        for (var attr in attrs) if (attrs.hasOwnProperty(attr) && (!prefix || matches(attr, prefix, matchInMiddle)))
+          result.push(attr);
+      }
+    }
+    function returnHints() {
+      return {
+        list: result,
+        from: replaceToken ? Pos(cur.line, tagStart == null ? token.start : tagStart) : cur,
+        to: replaceToken ? Pos(cur.line, token.end) : cur
+      };
+    }
+    return returnHints();
+  }
+
+  CodeMirror.registerHelper("hint", "xml", getHints);
+});
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_codemirror.css b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_codemirror.css
new file mode 100644
index 0000000..86061bb
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_codemirror.css
@@ -0,0 +1,349 @@
+/* BASICS */
+
+.CodeMirror {
+  /* Set height, width, borders, and global font properties here */
+  font-family: monospace;
+  height: 300px;
+  color: black;
+  direction: ltr;
+}
+
+/* PADDING */
+
+.CodeMirror-lines {
+  padding: 4px 0; /* Vertical padding around content */
+}
+.CodeMirror pre.CodeMirror-line,
+.CodeMirror pre.CodeMirror-line-like {
+  padding: 0 4px; /* Horizontal padding of content */
+}
+
+.CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler {
+  background-color: white; /* The little square between H and V scrollbars */
+}
+
+/* GUTTER */
+
+.CodeMirror-gutters {
+  border-right: 1px solid #ddd;
+  background-color: #f7f7f7;
+  white-space: nowrap;
+}
+.CodeMirror-linenumbers {}
+.CodeMirror-linenumber {
+  padding: 0 3px 0 5px;
+  min-width: 20px;
+  text-align: right;
+  color: #999;
+  white-space: nowrap;
+}
+
+.CodeMirror-guttermarker { color: black; }
+.CodeMirror-guttermarker-subtle { color: #999; }
+
+/* CURSOR */
+
+.CodeMirror-cursor {
+  border-left: 1px solid black;
+  border-right: none;
+  width: 0;
+}
+/* Shown when moving in bi-directional text */
+.CodeMirror div.CodeMirror-secondarycursor {
+  border-left: 1px solid silver;
+}
+.cm-fat-cursor .CodeMirror-cursor {
+  width: auto;
+  border: 0 !important;
+  background: #7e7;
+}
+.cm-fat-cursor div.CodeMirror-cursors {
+  z-index: 1;
+}
+.cm-fat-cursor-mark {
+  background-color: rgba(20, 255, 20, 0.5);
+  -webkit-animation: blink 1.06s steps(1) infinite;
+  -moz-animation: blink 1.06s steps(1) infinite;
+  animation: blink 1.06s steps(1) infinite;
+}
+.cm-animate-fat-cursor {
+  width: auto;
+  -webkit-animation: blink 1.06s steps(1) infinite;
+  -moz-animation: blink 1.06s steps(1) infinite;
+  animation: blink 1.06s steps(1) infinite;
+  background-color: #7e7;
+}
+@-moz-keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+@-webkit-keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+@keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+
+/* Can style cursor different in overwrite (non-insert) mode */
+.CodeMirror-overwrite .CodeMirror-cursor {}
+
+.cm-tab { display: inline-block; text-decoration: inherit; }
+
+.CodeMirror-rulers {
+  position: absolute;
+  left: 0; right: 0; top: -50px; bottom: 0;
+  overflow: hidden;
+}
+.CodeMirror-ruler {
+  border-left: 1px solid #ccc;
+  top: 0; bottom: 0;
+  position: absolute;
+}
+
+/* DEFAULT THEME */
+
+.cm-s-default .cm-header {color: blue;}
+.cm-s-default .cm-quote {color: #090;}
+.cm-negative {color: #d44;}
+.cm-positive {color: #292;}
+.cm-header, .cm-strong {font-weight: bold;}
+.cm-em {font-style: italic;}
+.cm-link {text-decoration: underline;}
+.cm-strikethrough {text-decoration: line-through;}
+
+.cm-s-default .cm-keyword {color: #708;}
+.cm-s-default .cm-atom {color: #219;}
+.cm-s-default .cm-number {color: #164;}
+.cm-s-default .cm-def {color: #00f;}
+.cm-s-default .cm-variable,
+.cm-s-default .cm-punctuation,
+.cm-s-default .cm-property,
+.cm-s-default .cm-operator {}
+.cm-s-default .cm-variable-2 {color: #05a;}
+.cm-s-default .cm-variable-3, .cm-s-default .cm-type {color: #085;}
+.cm-s-default .cm-comment {color: #a50;}
+.cm-s-default .cm-string {color: #a11;}
+.cm-s-default .cm-string-2 {color: #f50;}
+.cm-s-default .cm-meta {color: #555;}
+.cm-s-default .cm-qualifier {color: #555;}
+.cm-s-default .cm-builtin {color: #30a;}
+.cm-s-default .cm-bracket {color: #997;}
+.cm-s-default .cm-tag {color: #170;}
+.cm-s-default .cm-attribute {color: #00c;}
+.cm-s-default .cm-hr {color: #999;}
+.cm-s-default .cm-link {color: #00c;}
+
+.cm-s-default .cm-error {color: #f00;}
+.cm-invalidchar {color: #f00;}
+
+.CodeMirror-composing { border-bottom: 2px solid; }
+
+/* Default styles for common addons */
+
+div.CodeMirror span.CodeMirror-matchingbracket {color: #0b0;}
+div.CodeMirror span.CodeMirror-nonmatchingbracket {color: #a22;}
+.CodeMirror-matchingtag { background: rgba(255, 150, 0, .3); }
+.CodeMirror-activeline-background {background: #e8f2ff;}
+
+/* STOP */
+
+/* The rest of this file contains styles related to the mechanics of
+   the editor. You probably shouldn't touch them. */
+
+.CodeMirror {
+  position: relative;
+  overflow: hidden;
+  background: white;
+}
+
+.CodeMirror-scroll {
+  overflow: scroll !important; /* Things will break if this is overridden */
+  /* 50px is the magic margin used to hide the element's real scrollbars */
+  /* See overflow: hidden in .CodeMirror */
+  margin-bottom: -50px; margin-right: -50px;
+  padding-bottom: 50px;
+  height: 100%;
+  outline: none; /* Prevent dragging from highlighting the element */
+  position: relative;
+}
+.CodeMirror-sizer {
+  position: relative;
+  border-right: 50px solid transparent;
+}
+
+/* The fake, visible scrollbars. Used to force redraw during scrolling
+   before actual scrolling happens, thus preventing shaking and
+   flickering artifacts. */
+.CodeMirror-vscrollbar, .CodeMirror-hscrollbar, .CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler {
+  position: absolute;
+  z-index: 6;
+  display: none;
+  outline: none;
+}
+.CodeMirror-vscrollbar {
+  right: 0; top: 0;
+  overflow-x: hidden;
+  overflow-y: scroll;
+}
+.CodeMirror-hscrollbar {
+  bottom: 0; left: 0;
+  overflow-y: hidden;
+  overflow-x: scroll;
+}
+.CodeMirror-scrollbar-filler {
+  right: 0; bottom: 0;
+}
+.CodeMirror-gutter-filler {
+  left: 0; bottom: 0;
+}
+
+.CodeMirror-gutters {
+  position: absolute; left: 0; top: 0;
+  min-height: 100%;
+  z-index: 3;
+}
+.CodeMirror-gutter {
+  white-space: normal;
+  height: 100%;
+  display: inline-block;
+  vertical-align: top;
+  margin-bottom: -50px;
+}
+.CodeMirror-gutter-wrapper {
+  position: absolute;
+  z-index: 4;
+  background: none !important;
+  border: none !important;
+}
+.CodeMirror-gutter-background {
+  position: absolute;
+  top: 0; bottom: 0;
+  z-index: 4;
+}
+.CodeMirror-gutter-elt {
+  position: absolute;
+  cursor: default;
+  z-index: 4;
+}
+.CodeMirror-gutter-wrapper ::selection { background-color: transparent }
+.CodeMirror-gutter-wrapper ::-moz-selection { background-color: transparent }
+
+.CodeMirror-lines {
+  cursor: text;
+  min-height: 1px; /* prevents collapsing before first draw */
+}
+.CodeMirror pre.CodeMirror-line,
+.CodeMirror pre.CodeMirror-line-like {
+  /* Reset some styles that the rest of the page might have set */
+  -moz-border-radius: 0; -webkit-border-radius: 0; border-radius: 0;
+  border-width: 0;
+  background: transparent;
+  font-family: inherit;
+  font-size: inherit;
+  margin: 0;
+  white-space: pre;
+  word-wrap: normal;
+  line-height: inherit;
+  color: inherit;
+  z-index: 2;
+  position: relative;
+  overflow: visible;
+  -webkit-tap-highlight-color: transparent;
+  -webkit-font-variant-ligatures: contextual;
+  font-variant-ligatures: contextual;
+}
+.CodeMirror-wrap pre.CodeMirror-line,
+.CodeMirror-wrap pre.CodeMirror-line-like {
+  word-wrap: break-word;
+  white-space: pre-wrap;
+  word-break: normal;
+}
+
+.CodeMirror-linebackground {
+  position: absolute;
+  left: 0; right: 0; top: 0; bottom: 0;
+  z-index: 0;
+}
+
+.CodeMirror-linewidget {
+  position: relative;
+  z-index: 2;
+  padding: 0.1px; /* Force widget margins to stay inside of the container */
+}
+
+.CodeMirror-widget {}
+
+.CodeMirror-rtl pre { direction: rtl; }
+
+.CodeMirror-code {
+  outline: none;
+}
+
+/* Force content-box sizing for the elements where we expect it */
+.CodeMirror-scroll,
+.CodeMirror-sizer,
+.CodeMirror-gutter,
+.CodeMirror-gutters,
+.CodeMirror-linenumber {
+  -moz-box-sizing: content-box;
+  box-sizing: content-box;
+}
+
+.CodeMirror-measure {
+  position: absolute;
+  width: 100%;
+  height: 0;
+  overflow: hidden;
+  visibility: hidden;
+}
+
+.CodeMirror-cursor {
+  position: absolute;
+  pointer-events: none;
+}
+.CodeMirror-measure pre { position: static; }
+
+div.CodeMirror-cursors {
+  visibility: hidden;
+  position: relative;
+  z-index: 3;
+}
+div.CodeMirror-dragcursors {
+  visibility: visible;
+}
+
+.CodeMirror-focused div.CodeMirror-cursors {
+  visibility: visible;
+}
+
+.CodeMirror-selected { background: #d9d9d9; }
+.CodeMirror-focused .CodeMirror-selected { background: #d7d4f0; }
+.CodeMirror-crosshair { cursor: crosshair; }
+.CodeMirror-line::selection, .CodeMirror-line > span::selection, .CodeMirror-line > span > span::selection { background: #d7d4f0; }
+.CodeMirror-line::-moz-selection, .CodeMirror-line > span::-moz-selection, .CodeMirror-line > span > span::-moz-selection { background: #d7d4f0; }
+
+.cm-searching {
+  background-color: #ffa;
+  background-color: rgba(255, 255, 0, .4);
+}
+
+/* Used to force a border model for a node */
+.cm-force-border { padding-right: .1px; }
+
+@media print {
+  /* Hide the cursor when printing */
+  .CodeMirror div.CodeMirror-cursors {
+    visibility: hidden;
+  }
+}
+
+/* See issue #2901 */
+.cm-tab-wrap-hack:after { content: ''; }
+
+/* Help users use markselection to safely style text background */
+span.CodeMirror-selectedtext { background: none; }
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_codemirror.js b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_codemirror.js
new file mode 100644
index 0000000..79793f1
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_codemirror.js
@@ -0,0 +1,9833 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+// This is CodeMirror (https://codemirror.net), a code editor
+// implemented in JavaScript on top of the browser's DOM.
+//
+// You can find some technical background for some of the code below
+// at http://marijnhaverbeke.nl/blog/#cm-internals .
+
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global = global || self, global.CodeMirror = factory());
+}(this, (function () { 'use strict';
+
+  // Kludges for bugs and behavior differences that can't be feature
+  // detected are enabled based on userAgent etc sniffing.
+  var userAgent = navigator.userAgent;
+  var platform = navigator.platform;
+
+  var gecko = /gecko\/\d/i.test(userAgent);
+  var ie_upto10 = /MSIE \d/.test(userAgent);
+  var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
+  var edge = /Edge\/(\d+)/.exec(userAgent);
+  var ie = ie_upto10 || ie_11up || edge;
+  var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1]);
+  var webkit = !edge && /WebKit\//.test(userAgent);
+  var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
+  var chrome = !edge && /Chrome\//.test(userAgent);
+  var presto = /Opera\//.test(userAgent);
+  var safari = /Apple Computer/.test(navigator.vendor);
+  var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
+  var phantom = /PhantomJS/.test(userAgent);
+
+  var ios = safari && (/Mobile\/\w+/.test(userAgent) || navigator.maxTouchPoints > 2);
+  var android = /Android/.test(userAgent);
+  // This is woefully incomplete. Suggestions for alternative methods welcome.
+  var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
+  var mac = ios || /Mac/.test(platform);
+  var chromeOS = /\bCrOS\b/.test(userAgent);
+  var windows = /win/i.test(platform);
+
+  var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
+  if (presto_version) { presto_version = Number(presto_version[1]); }
+  if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
+  // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
+  var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
+  var captureRightClick = gecko || (ie && ie_version >= 9);
+
+  function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }
+
+  var rmClass = function(node, cls) {
+    var current = node.className;
+    var match = classTest(cls).exec(current);
+    if (match) {
+      var after = current.slice(match.index + match[0].length);
+      node.className = current.slice(0, match.index) + (after ? match[1] + after : "");
+    }
+  };
+
+  function removeChildren(e) {
+    for (var count = e.childNodes.length; count > 0; --count)
+      { e.removeChild(e.firstChild); }
+    return e
+  }
+
+  function removeChildrenAndAdd(parent, e) {
+    return removeChildren(parent).appendChild(e)
+  }
+
+  function elt(tag, content, className, style) {
+    var e = document.createElement(tag);
+    if (className) { e.className = className; }
+    if (style) { e.style.cssText = style; }
+    if (typeof content == "string") { e.appendChild(document.createTextNode(content)); }
+    else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]); } }
+    return e
+  }
+  // wrapper for elt, which removes the elt from the accessibility tree
+  function eltP(tag, content, className, style) {
+    var e = elt(tag, content, className, style);
+    e.setAttribute("role", "presentation");
+    return e
+  }
+
+  var range;
+  if (document.createRange) { range = function(node, start, end, endNode) {
+    var r = document.createRange();
+    r.setEnd(endNode || node, end);
+    r.setStart(node, start);
+    return r
+  }; }
+  else { range = function(node, start, end) {
+    var r = document.body.createTextRange();
+    try { r.moveToElementText(node.parentNode); }
+    catch(e) { return r }
+    r.collapse(true);
+    r.moveEnd("character", end);
+    r.moveStart("character", start);
+    return r
+  }; }
+
+  function contains(parent, child) {
+    if (child.nodeType == 3) // Android browser always returns false when child is a textnode
+      { child = child.parentNode; }
+    if (parent.contains)
+      { return parent.contains(child) }
+    do {
+      if (child.nodeType == 11) { child = child.host; }
+      if (child == parent) { return true }
+    } while (child = child.parentNode)
+  }
+
+  function activeElt() {
+    // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
+    // IE < 10 will throw when accessed while the page is loading or in an iframe.
+    // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
+    var activeElement;
+    try {
+      activeElement = document.activeElement;
+    } catch(e) {
+      activeElement = document.body || null;
+    }
+    while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
+      { activeElement = activeElement.shadowRoot.activeElement; }
+    return activeElement
+  }
+
+  function addClass(node, cls) {
+    var current = node.className;
+    if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls; }
+  }
+  function joinClasses(a, b) {
+    var as = a.split(" ");
+    for (var i = 0; i < as.length; i++)
+      { if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i]; } }
+    return b
+  }
+
+  var selectInput = function(node) { node.select(); };
+  if (ios) // Mobile Safari apparently has a bug where select() is broken.
+    { selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; }; }
+  else if (ie) // Suppress mysterious IE10 errors
+    { selectInput = function(node) { try { node.select(); } catch(_e) {} }; }
+
+  function bind(f) {
+    var args = Array.prototype.slice.call(arguments, 1);
+    return function(){return f.apply(null, args)}
+  }
+
+  function copyObj(obj, target, overwrite) {
+    if (!target) { target = {}; }
+    for (var prop in obj)
+      { if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
+        { target[prop] = obj[prop]; } }
+    return target
+  }
+
+  // Counts the column offset in a string, taking tabs into account.
+  // Used mostly to find indentation.
+  function countColumn(string, end, tabSize, startIndex, startValue) {
+    if (end == null) {
+      end = string.search(/[^\s\u00a0]/);
+      if (end == -1) { end = string.length; }
+    }
+    for (var i = startIndex || 0, n = startValue || 0;;) {
+      var nextTab = string.indexOf("\t", i);
+      if (nextTab < 0 || nextTab >= end)
+        { return n + (end - i) }
+      n += nextTab - i;
+      n += tabSize - (n % tabSize);
+      i = nextTab + 1;
+    }
+  }
+
+  var Delayed = function() {
+    this.id = null;
+    this.f = null;
+    this.time = 0;
+    this.handler = bind(this.onTimeout, this);
+  };
+  Delayed.prototype.onTimeout = function (self) {
+    self.id = 0;
+    if (self.time <= +new Date) {
+      self.f();
+    } else {
+      setTimeout(self.handler, self.time - +new Date);
+    }
+  };
+  Delayed.prototype.set = function (ms, f) {
+    this.f = f;
+    var time = +new Date + ms;
+    if (!this.id || time < this.time) {
+      clearTimeout(this.id);
+      this.id = setTimeout(this.handler, ms);
+      this.time = time;
+    }
+  };
+
+  function indexOf(array, elt) {
+    for (var i = 0; i < array.length; ++i)
+      { if (array[i] == elt) { return i } }
+    return -1
+  }
+
+  // Number of pixels added to scroller and sizer to hide scrollbar
+  var scrollerGap = 50;
+
+  // Returned or thrown by various protocols to signal 'I'm not
+  // handling this'.
+  var Pass = {toString: function(){return "CodeMirror.Pass"}};
+
+  // Reused option objects for setSelection & friends
+  var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"};
+
+  // The inverse of countColumn -- find the offset that corresponds to
+  // a particular column.
+  function findColumn(string, goal, tabSize) {
+    for (var pos = 0, col = 0;;) {
+      var nextTab = string.indexOf("\t", pos);
+      if (nextTab == -1) { nextTab = string.length; }
+      var skipped = nextTab - pos;
+      if (nextTab == string.length || col + skipped >= goal)
+        { return pos + Math.min(skipped, goal - col) }
+      col += nextTab - pos;
+      col += tabSize - (col % tabSize);
+      pos = nextTab + 1;
+      if (col >= goal) { return pos }
+    }
+  }
+
+  var spaceStrs = [""];
+  function spaceStr(n) {
+    while (spaceStrs.length <= n)
+      { spaceStrs.push(lst(spaceStrs) + " "); }
+    return spaceStrs[n]
+  }
+
+  function lst(arr) { return arr[arr.length-1] }
+
+  function map(array, f) {
+    var out = [];
+    for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i); }
+    return out
+  }
+
+  function insertSorted(array, value, score) {
+    var pos = 0, priority = score(value);
+    while (pos < array.length && score(array[pos]) <= priority) { pos++; }
+    array.splice(pos, 0, value);
+  }
+
+  function nothing() {}
+
+  function createObj(base, props) {
+    var inst;
+    if (Object.create) {
+      inst = Object.create(base);
+    } else {
+      nothing.prototype = base;
+      inst = new nothing();
+    }
+    if (props) { copyObj(props, inst); }
+    return inst
+  }
+
+  var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
+  function isWordCharBasic(ch) {
+    return /\w/.test(ch) || ch > "\x80" &&
+      (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
+  }
+  function isWordChar(ch, helper) {
+    if (!helper) { return isWordCharBasic(ch) }
+    if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
+    return helper.test(ch)
+  }
+
+  function isEmpty(obj) {
+    for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
+    return true
+  }
+
+  // Extending unicode characters. A series of a non-extending char +
+  // any number of extending chars is treated as a single unit as far
+  // as editing and measuring is concerned. This is not fully correct,
+  // since some scripts/fonts/browsers also treat other configurations
+  // of code points as a group.
+  var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
+  function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }
+
+  // Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
+  function skipExtendingChars(str, pos, dir) {
+    while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir; }
+    return pos
+  }
+
+  // Returns the value from the range [`from`; `to`] that satisfies
+  // `pred` and is closest to `from`. Assumes that at least `to`
+  // satisfies `pred`. Supports `from` being greater than `to`.
+  function findFirst(pred, from, to) {
+    // At any point we are certain `to` satisfies `pred`, don't know
+    // whether `from` does.
+    var dir = from > to ? -1 : 1;
+    for (;;) {
+      if (from == to) { return from }
+      var midF = (from + to) / 2, mid = dir < 0 ? Math.ceil(midF) : Math.floor(midF);
+      if (mid == from) { return pred(mid) ? from : to }
+      if (pred(mid)) { to = mid; }
+      else { from = mid + dir; }
+    }
+  }
+
+  // BIDI HELPERS
+
+  function iterateBidiSections(order, from, to, f) {
+    if (!order) { return f(from, to, "ltr", 0) }
+    var found = false;
+    for (var i = 0; i < order.length; ++i) {
+      var part = order[i];
+      if (part.from < to && part.to > from || from == to && part.to == from) {
+        f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr", i);
+        found = true;
+      }
+    }
+    if (!found) { f(from, to, "ltr"); }
+  }
+
+  var bidiOther = null;
+  function getBidiPartAt(order, ch, sticky) {
+    var found;
+    bidiOther = null;
+    for (var i = 0; i < order.length; ++i) {
+      var cur = order[i];
+      if (cur.from < ch && cur.to > ch) { return i }
+      if (cur.to == ch) {
+        if (cur.from != cur.to && sticky == "before") { found = i; }
+        else { bidiOther = i; }
+      }
+      if (cur.from == ch) {
+        if (cur.from != cur.to && sticky != "before") { found = i; }
+        else { bidiOther = i; }
+      }
+    }
+    return found != null ? found : bidiOther
+  }
+
+  // Bidirectional ordering algorithm
+  // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
+  // that this (partially) implements.
+
+  // One-char codes used for character types:
+  // L (L):   Left-to-Right
+  // R (R):   Right-to-Left
+  // r (AL):  Right-to-Left Arabic
+  // 1 (EN):  European Number
+  // + (ES):  European Number Separator
+  // % (ET):  European Number Terminator
+  // n (AN):  Arabic Number
+  // , (CS):  Common Number Separator
+  // m (NSM): Non-Spacing Mark
+  // b (BN):  Boundary Neutral
+  // s (B):   Paragraph Separator
+  // t (S):   Segment Separator
+  // w (WS):  Whitespace
+  // N (ON):  Other Neutrals
+
+  // Returns null if characters are ordered as they appear
+  // (left-to-right), or an array of sections ({from, to, level}
+  // objects) in the order in which they occur visually.
+  var bidiOrdering = (function() {
+    // Character types for codepoints 0 to 0xff
+    var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN";
+    // Character types for codepoints 0x600 to 0x6f9
+    var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111";
+    function charType(code) {
+      if (code <= 0xf7) { return lowTypes.charAt(code) }
+      else if (0x590 <= code && code <= 0x5f4) { return "R" }
+      else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
+      else if (0x6ee <= code && code <= 0x8ac) { return "r" }
+      else if (0x2000 <= code && code <= 0x200b) { return "w" }
+      else if (code == 0x200c) { return "b" }
+      else { return "L" }
+    }
+
+    var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
+    var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
+
+    function BidiSpan(level, from, to) {
+      this.level = level;
+      this.from = from; this.to = to;
+    }
+
+    return function(str, direction) {
+      var outerType = direction == "ltr" ? "L" : "R";
+
+      if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
+      var len = str.length, types = [];
+      for (var i = 0; i < len; ++i)
+        { types.push(charType(str.charCodeAt(i))); }
+
+      // W1. Examine each non-spacing mark (NSM) in the level run, and
+      // change the type of the NSM to the type of the previous
+      // character. If the NSM is at the start of the level run, it will
+      // get the type of sor.
+      for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
+        var type = types[i$1];
+        if (type == "m") { types[i$1] = prev; }
+        else { prev = type; }
+      }
+
+      // W2. Search backwards from each instance of a European number
+      // until the first strong type (R, L, AL, or sor) is found. If an
+      // AL is found, change the type of the European number to Arabic
+      // number.
+      // W3. Change all ALs to R.
+      for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
+        var type$1 = types[i$2];
+        if (type$1 == "1" && cur == "r") { types[i$2] = "n"; }
+        else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R"; } }
+      }
+
+      // W4. A single European separator between two European numbers
+      // changes to a European number. A single common separator between
+      // two numbers of the same type changes to that type.
+      for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
+        var type$2 = types[i$3];
+        if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1"; }
+        else if (type$2 == "," && prev$1 == types[i$3+1] &&
+                 (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1; }
+        prev$1 = type$2;
+      }
+
+      // W5. A sequence of European terminators adjacent to European
+      // numbers changes to all European numbers.
+      // W6. Otherwise, separators and terminators change to Other
+      // Neutral.
+      for (var i$4 = 0; i$4 < len; ++i$4) {
+        var type$3 = types[i$4];
+        if (type$3 == ",") { types[i$4] = "N"; }
+        else if (type$3 == "%") {
+          var end = (void 0);
+          for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
+          var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
+          for (var j = i$4; j < end; ++j) { types[j] = replace; }
+          i$4 = end - 1;
+        }
+      }
+
+      // W7. Search backwards from each instance of a European number
+      // until the first strong type (R, L, or sor) is found. If an L is
+      // found, then change the type of the European number to L.
+      for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
+        var type$4 = types[i$5];
+        if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L"; }
+        else if (isStrong.test(type$4)) { cur$1 = type$4; }
+      }
+
+      // N1. A sequence of neutrals takes the direction of the
+      // surrounding strong text if the text on both sides has the same
+      // direction. European and Arabic numbers act as if they were R in
+      // terms of their influence on neutrals. Start-of-level-run (sor)
+      // and end-of-level-run (eor) are used at level run boundaries.
+      // N2. Any remaining neutrals take the embedding direction.
+      for (var i$6 = 0; i$6 < len; ++i$6) {
+        if (isNeutral.test(types[i$6])) {
+          var end$1 = (void 0);
+          for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
+          var before = (i$6 ? types[i$6-1] : outerType) == "L";
+          var after = (end$1 < len ? types[end$1] : outerType) == "L";
+          var replace$1 = before == after ? (before ? "L" : "R") : outerType;
+          for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1; }
+          i$6 = end$1 - 1;
+        }
+      }
+
+      // Here we depart from the documented algorithm, in order to avoid
+      // building up an actual levels array. Since there are only three
+      // levels (0, 1, 2) in an implementation that doesn't take
+      // explicit embedding into account, we can build up the order on
+      // the fly, without following the level-based algorithm.
+      var order = [], m;
+      for (var i$7 = 0; i$7 < len;) {
+        if (countsAsLeft.test(types[i$7])) {
+          var start = i$7;
+          for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
+          order.push(new BidiSpan(0, start, i$7));
+        } else {
+          var pos = i$7, at = order.length, isRTL = direction == "rtl" ? 1 : 0;
+          for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
+          for (var j$2 = pos; j$2 < i$7;) {
+            if (countsAsNum.test(types[j$2])) {
+              if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)); at += isRTL; }
+              var nstart = j$2;
+              for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
+              order.splice(at, 0, new BidiSpan(2, nstart, j$2));
+              at += isRTL;
+              pos = j$2;
+            } else { ++j$2; }
+          }
+          if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)); }
+        }
+      }
+      if (direction == "ltr") {
+        if (order[0].level == 1 && (m = str.match(/^\s+/))) {
+          order[0].from = m[0].length;
+          order.unshift(new BidiSpan(0, 0, m[0].length));
+        }
+        if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
+          lst(order).to -= m[0].length;
+          order.push(new BidiSpan(0, len - m[0].length, len));
+        }
+      }
+
+      return direction == "rtl" ? order.reverse() : order
+    }
+  })();
+
+  // Get the bidi ordering for the given line (and cache it). Returns
+  // false for lines that are fully left-to-right, and an array of
+  // BidiSpan objects otherwise.
+  function getOrder(line, direction) {
+    var order = line.order;
+    if (order == null) { order = line.order = bidiOrdering(line.text, direction); }
+    return order
+  }
+
+  // EVENT HANDLING
+
+  // Lightweight event framework. on/off also work on DOM nodes,
+  // registering native DOM handlers.
+
+  var noHandlers = [];
+
+  var on = function(emitter, type, f) {
+    if (emitter.addEventListener) {
+      emitter.addEventListener(type, f, false);
+    } else if (emitter.attachEvent) {
+      emitter.attachEvent("on" + type, f);
+    } else {
+      var map = emitter._handlers || (emitter._handlers = {});
+      map[type] = (map[type] || noHandlers).concat(f);
+    }
+  };
+
+  function getHandlers(emitter, type) {
+    return emitter._handlers && emitter._handlers[type] || noHandlers
+  }
+
+  function off(emitter, type, f) {
+    if (emitter.removeEventListener) {
+      emitter.removeEventListener(type, f, false);
+    } else if (emitter.detachEvent) {
+      emitter.detachEvent("on" + type, f);
+    } else {
+      var map = emitter._handlers, arr = map && map[type];
+      if (arr) {
+        var index = indexOf(arr, f);
+        if (index > -1)
+          { map[type] = arr.slice(0, index).concat(arr.slice(index + 1)); }
+      }
+    }
+  }
+
+  function signal(emitter, type /*, values...*/) {
+    var handlers = getHandlers(emitter, type);
+    if (!handlers.length) { return }
+    var args = Array.prototype.slice.call(arguments, 2);
+    for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args); }
+  }
+
+  // The DOM events that CodeMirror handles can be overridden by
+  // registering a (non-DOM) handler on the editor for the event name,
+  // and preventDefault-ing the event in that handler.
+  function signalDOMEvent(cm, e, override) {
+    if (typeof e == "string")
+      { e = {type: e, preventDefault: function() { this.defaultPrevented = true; }}; }
+    signal(cm, override || e.type, cm, e);
+    return e_defaultPrevented(e) || e.codemirrorIgnore
+  }
+
+  function signalCursorActivity(cm) {
+    var arr = cm._handlers && cm._handlers.cursorActivity;
+    if (!arr) { return }
+    var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
+    for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
+      { set.push(arr[i]); } }
+  }
+
+  function hasHandler(emitter, type) {
+    return getHandlers(emitter, type).length > 0
+  }
+
+  // Add on and off methods to a constructor's prototype, to make
+  // registering events on such objects more convenient.
+  function eventMixin(ctor) {
+    ctor.prototype.on = function(type, f) {on(this, type, f);};
+    ctor.prototype.off = function(type, f) {off(this, type, f);};
+  }
+
+  // Due to the fact that we still support jurassic IE versions, some
+  // compatibility wrappers are needed.
+
+  function e_preventDefault(e) {
+    if (e.preventDefault) { e.preventDefault(); }
+    else { e.returnValue = false; }
+  }
+  function e_stopPropagation(e) {
+    if (e.stopPropagation) { e.stopPropagation(); }
+    else { e.cancelBubble = true; }
+  }
+  function e_defaultPrevented(e) {
+    return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
+  }
+  function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}
+
+  function e_target(e) {return e.target || e.srcElement}
+  function e_button(e) {
+    var b = e.which;
+    if (b == null) {
+      if (e.button & 1) { b = 1; }
+      else if (e.button & 2) { b = 3; }
+      else if (e.button & 4) { b = 2; }
+    }
+    if (mac && e.ctrlKey && b == 1) { b = 3; }
+    return b
+  }
+
+  // Detect drag-and-drop
+  var dragAndDrop = function() {
+    // There is *some* kind of drag-and-drop support in IE6-8, but I
+    // couldn't get it to work yet.
+    if (ie && ie_version < 9) { return false }
+    var div = elt('div');
+    return "draggable" in div || "dragDrop" in div
+  }();
+
+  var zwspSupported;
+  function zeroWidthElement(measure) {
+    if (zwspSupported == null) {
+      var test = elt("span", "\u200b");
+      removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
+      if (measure.firstChild.offsetHeight != 0)
+        { zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8); }
+    }
+    var node = zwspSupported ? elt("span", "\u200b") :
+      elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
+    node.setAttribute("cm-text", "");
+    return node
+  }
+
+  // Feature-detect IE's crummy client rect reporting for bidi text
+  var badBidiRects;
+  function hasBadBidiRects(measure) {
+    if (badBidiRects != null) { return badBidiRects }
+    var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
+    var r0 = range(txt, 0, 1).getBoundingClientRect();
+    var r1 = range(txt, 1, 2).getBoundingClientRect();
+    removeChildren(measure);
+    if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
+    return badBidiRects = (r1.right - r0.right < 3)
+  }
+
+  // See if "".split is the broken IE version, if so, provide an
+  // alternative way to split lines.
+  var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
+    var pos = 0, result = [], l = string.length;
+    while (pos <= l) {
+      var nl = string.indexOf("\n", pos);
+      if (nl == -1) { nl = string.length; }
+      var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
+      var rt = line.indexOf("\r");
+      if (rt != -1) {
+        result.push(line.slice(0, rt));
+        pos += rt + 1;
+      } else {
+        result.push(line);
+        pos = nl + 1;
+      }
+    }
+    return result
+  } : function (string) { return string.split(/\r\n?|\n/); };
+
+  var hasSelection = window.getSelection ? function (te) {
+    try { return te.selectionStart != te.selectionEnd }
+    catch(e) { return false }
+  } : function (te) {
+    var range;
+    try {range = te.ownerDocument.selection.createRange();}
+    catch(e) {}
+    if (!range || range.parentElement() != te) { return false }
+    return range.compareEndPoints("StartToEnd", range) != 0
+  };
+
+  var hasCopyEvent = (function () {
+    var e = elt("div");
+    if ("oncopy" in e) { return true }
+    e.setAttribute("oncopy", "return;");
+    return typeof e.oncopy == "function"
+  })();
+
+  var badZoomedRects = null;
+  function hasBadZoomedRects(measure) {
+    if (badZoomedRects != null) { return badZoomedRects }
+    var node = removeChildrenAndAdd(measure, elt("span", "x"));
+    var normal = node.getBoundingClientRect();
+    var fromRange = range(node, 0, 1).getBoundingClientRect();
+    return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
+  }
+
+  // Known modes, by name and by MIME
+  var modes = {}, mimeModes = {};
+
+  // Extra arguments are stored as the mode's dependencies, which is
+  // used by (legacy) mechanisms like loadmode.js to automatically
+  // load a mode. (Preferred mechanism is the require/define calls.)
+  function defineMode(name, mode) {
+    if (arguments.length > 2)
+      { mode.dependencies = Array.prototype.slice.call(arguments, 2); }
+    modes[name] = mode;
+  }
+
+  function defineMIME(mime, spec) {
+    mimeModes[mime] = spec;
+  }
+
+  // Given a MIME type, a {name, ...options} config object, or a name
+  // string, return a mode config object.
+  function resolveMode(spec) {
+    if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
+      spec = mimeModes[spec];
+    } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
+      var found = mimeModes[spec.name];
+      if (typeof found == "string") { found = {name: found}; }
+      spec = createObj(found, spec);
+      spec.name = found.name;
+    } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
+      return resolveMode("application/xml")
+    } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
+      return resolveMode("application/json")
+    }
+    if (typeof spec == "string") { return {name: spec} }
+    else { return spec || {name: "null"} }
+  }
+
+  // Given a mode spec (anything that resolveMode accepts), find and
+  // initialize an actual mode object.
+  function getMode(options, spec) {
+    spec = resolveMode(spec);
+    var mfactory = modes[spec.name];
+    if (!mfactory) { return getMode(options, "text/plain") }
+    var modeObj = mfactory(options, spec);
+    if (modeExtensions.hasOwnProperty(spec.name)) {
+      var exts = modeExtensions[spec.name];
+      for (var prop in exts) {
+        if (!exts.hasOwnProperty(prop)) { continue }
+        if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop]; }
+        modeObj[prop] = exts[prop];
+      }
+    }
+    modeObj.name = spec.name;
+    if (spec.helperType) { modeObj.helperType = spec.helperType; }
+    if (spec.modeProps) { for (var prop$1 in spec.modeProps)
+      { modeObj[prop$1] = spec.modeProps[prop$1]; } }
+
+    return modeObj
+  }
+
+  // This can be used to attach properties to mode objects from
+  // outside the actual mode definition.
+  var modeExtensions = {};
+  function extendMode(mode, properties) {
+    var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
+    copyObj(properties, exts);
+  }
+
+  function copyState(mode, state) {
+    if (state === true) { return state }
+    if (mode.copyState) { return mode.copyState(state) }
+    var nstate = {};
+    for (var n in state) {
+      var val = state[n];
+      if (val instanceof Array) { val = val.concat([]); }
+      nstate[n] = val;
+    }
+    return nstate
+  }
+
+  // Given a mode and a state (for that mode), find the inner mode and
+  // state at the position that the state refers to.
+  function innerMode(mode, state) {
+    var info;
+    while (mode.innerMode) {
+      info = mode.innerMode(state);
+      if (!info || info.mode == mode) { break }
+      state = info.state;
+      mode = info.mode;
+    }
+    return info || {mode: mode, state: state}
+  }
+
+  function startState(mode, a1, a2) {
+    return mode.startState ? mode.startState(a1, a2) : true
+  }
+
+  // STRING STREAM
+
+  // Fed to the mode parsers, provides helper functions to make
+  // parsers more succinct.
+
+  var StringStream = function(string, tabSize, lineOracle) {
+    this.pos = this.start = 0;
+    this.string = string;
+    this.tabSize = tabSize || 8;
+    this.lastColumnPos = this.lastColumnValue = 0;
+    this.lineStart = 0;
+    this.lineOracle = lineOracle;
+  };
+
+  StringStream.prototype.eol = function () {return this.pos >= this.string.length};
+  StringStream.prototype.sol = function () {return this.pos == this.lineStart};
+  StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
+  StringStream.prototype.next = function () {
+    if (this.pos < this.string.length)
+      { return this.string.charAt(this.pos++) }
+  };
+  StringStream.prototype.eat = function (match) {
+    var ch = this.string.charAt(this.pos);
+    var ok;
+    if (typeof match == "string") { ok = ch == match; }
+    else { ok = ch && (match.test ? match.test(ch) : match(ch)); }
+    if (ok) {++this.pos; return ch}
+  };
+  StringStream.prototype.eatWhile = function (match) {
+    var start = this.pos;
+    while (this.eat(match)){}
+    return this.pos > start
+  };
+  StringStream.prototype.eatSpace = function () {
+    var start = this.pos;
+    while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this.pos; }
+    return this.pos > start
+  };
+  StringStream.prototype.skipToEnd = function () {this.pos = this.string.length;};
+  StringStream.prototype.skipTo = function (ch) {
+    var found = this.string.indexOf(ch, this.pos);
+    if (found > -1) {this.pos = found; return true}
+  };
+  StringStream.prototype.backUp = function (n) {this.pos -= n;};
+  StringStream.prototype.column = function () {
+    if (this.lastColumnPos < this.start) {
+      this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
+      this.lastColumnPos = this.start;
+    }
+    return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+  };
+  StringStream.prototype.indentation = function () {
+    return countColumn(this.string, null, this.tabSize) -
+      (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+  };
+  StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
+    if (typeof pattern == "string") {
+      var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; };
+      var substr = this.string.substr(this.pos, pattern.length);
+      if (cased(substr) == cased(pattern)) {
+        if (consume !== false) { this.pos += pattern.length; }
+        return true
+      }
+    } else {
+      var match = this.string.slice(this.pos).match(pattern);
+      if (match && match.index > 0) { return null }
+      if (match && consume !== false) { this.pos += match[0].length; }
+      return match
+    }
+  };
+  StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
+  StringStream.prototype.hideFirstChars = function (n, inner) {
+    this.lineStart += n;
+    try { return inner() }
+    finally { this.lineStart -= n; }
+  };
+  StringStream.prototype.lookAhead = function (n) {
+    var oracle = this.lineOracle;
+    return oracle && oracle.lookAhead(n)
+  };
+  StringStream.prototype.baseToken = function () {
+    var oracle = this.lineOracle;
+    return oracle && oracle.baseToken(this.pos)
+  };
+
+  // Find the line object corresponding to the given line number.
+  function getLine(doc, n) {
+    n -= doc.first;
+    if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
+    var chunk = doc;
+    while (!chunk.lines) {
+      for (var i = 0;; ++i) {
+        var child = chunk.children[i], sz = child.chunkSize();
+        if (n < sz) { chunk = child; break }
+        n -= sz;
+      }
+    }
+    return chunk.lines[n]
+  }
+
+  // Get the part of a document between two positions, as an array of
+  // strings.
+  function getBetween(doc, start, end) {
+    var out = [], n = start.line;
+    doc.iter(start.line, end.line + 1, function (line) {
+      var text = line.text;
+      if (n == end.line) { text = text.slice(0, end.ch); }
+      if (n == start.line) { text = text.slice(start.ch); }
+      out.push(text);
+      ++n;
+    });
+    return out
+  }
+  // Get the lines between from and to, as array of strings.
+  function getLines(doc, from, to) {
+    var out = [];
+    doc.iter(from, to, function (line) { out.push(line.text); }); // iter aborts when callback returns truthy value
+    return out
+  }
+
+  // Update the height of a line, propagating the height change
+  // upwards to parent nodes.
+  function updateLineHeight(line, height) {
+    var diff = height - line.height;
+    if (diff) { for (var n = line; n; n = n.parent) { n.height += diff; } }
+  }
+
+  // Given a line object, find its line number by walking up through
+  // its parent links.
+  function lineNo(line) {
+    if (line.parent == null) { return null }
+    var cur = line.parent, no = indexOf(cur.lines, line);
+    for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
+      for (var i = 0;; ++i) {
+        if (chunk.children[i] == cur) { break }
+        no += chunk.children[i].chunkSize();
+      }
+    }
+    return no + cur.first
+  }
+
+  // Find the line at the given vertical position, using the height
+  // information in the document tree.
+  function lineAtHeight(chunk, h) {
+    var n = chunk.first;
+    outer: do {
+      for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
+        var child = chunk.children[i$1], ch = child.height;
+        if (h < ch) { chunk = child; continue outer }
+        h -= ch;
+        n += child.chunkSize();
+      }
+      return n
+    } while (!chunk.lines)
+    var i = 0;
+    for (; i < chunk.lines.length; ++i) {
+      var line = chunk.lines[i], lh = line.height;
+      if (h < lh) { break }
+      h -= lh;
+    }
+    return n + i
+  }
+
+  function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}
+
+  function lineNumberFor(options, i) {
+    return String(options.lineNumberFormatter(i + options.firstLineNumber))
+  }
+
+  // A Pos instance represents a position within the text.
+  function Pos(line, ch, sticky) {
+    if ( sticky === void 0 ) sticky = null;
+
+    if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
+    this.line = line;
+    this.ch = ch;
+    this.sticky = sticky;
+  }
+
+  // Compare two positions, return 0 if they are the same, a negative
+  // number when a is less, and a positive number otherwise.
+  function cmp(a, b) { return a.line - b.line || a.ch - b.ch }
+
+  function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }
+
+  function copyPos(x) {return Pos(x.line, x.ch)}
+  function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
+  function minPos(a, b) { return cmp(a, b) < 0 ? a : b }
+
+  // Most of the external API clips given positions to make sure they
+  // actually exist within the document.
+  function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
+  function clipPos(doc, pos) {
+    if (pos.line < doc.first) { return Pos(doc.first, 0) }
+    var last = doc.first + doc.size - 1;
+    if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
+    return clipToLen(pos, getLine(doc, pos.line).text.length)
+  }
+  function clipToLen(pos, linelen) {
+    var ch = pos.ch;
+    if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
+    else if (ch < 0) { return Pos(pos.line, 0) }
+    else { return pos }
+  }
+  function clipPosArray(doc, array) {
+    var out = [];
+    for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]); }
+    return out
+  }
+
+  var SavedContext = function(state, lookAhead) {
+    this.state = state;
+    this.lookAhead = lookAhead;
+  };
+
+  var Context = function(doc, state, line, lookAhead) {
+    this.state = state;
+    this.doc = doc;
+    this.line = line;
+    this.maxLookAhead = lookAhead || 0;
+    this.baseTokens = null;
+    this.baseTokenPos = 1;
+  };
+
+  Context.prototype.lookAhead = function (n) {
+    var line = this.doc.getLine(this.line + n);
+    if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n; }
+    return line
+  };
+
+  Context.prototype.baseToken = function (n) {
+    if (!this.baseTokens) { return null }
+    while (this.baseTokens[this.baseTokenPos] <= n)
+      { this.baseTokenPos += 2; }
+    var type = this.baseTokens[this.baseTokenPos + 1];
+    return {type: type && type.replace(/( |^)overlay .*/, ""),
+            size: this.baseTokens[this.baseTokenPos] - n}
+  };
+
+  Context.prototype.nextLine = function () {
+    this.line++;
+    if (this.maxLookAhead > 0) { this.maxLookAhead--; }
+  };
+
+  Context.fromSaved = function (doc, saved, line) {
+    if (saved instanceof SavedContext)
+      { return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
+    else
+      { return new Context(doc, copyState(doc.mode, saved), line) }
+  };
+
+  Context.prototype.save = function (copy) {
+    var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state;
+    return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
+  };
+
+
+  // Compute a style array (an array starting with a mode generation
+  // -- for invalidation -- followed by pairs of end positions and
+  // style strings), which is used to highlight the tokens on the
+  // line.
+  function highlightLine(cm, line, context, forceToEnd) {
+    // A styles array always starts with a number identifying the
+    // mode/overlays that it is based on (for easy invalidation).
+    var st = [cm.state.modeGen], lineClasses = {};
+    // Compute the base array of styles
+    runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
+            lineClasses, forceToEnd);
+    var state = context.state;
+
+    // Run overlays, adjust style array.
+    var loop = function ( o ) {
+      context.baseTokens = st;
+      var overlay = cm.state.overlays[o], i = 1, at = 0;
+      context.state = true;
+      runMode(cm, line.text, overlay.mode, context, function (end, style) {
+        var start = i;
+        // Ensure there's a token end at the current position, and that i points at it
+        while (at < end) {
+          var i_end = st[i];
+          if (i_end > end)
+            { st.splice(i, 1, end, st[i+1], i_end); }
+          i += 2;
+          at = Math.min(end, i_end);
+        }
+        if (!style) { return }
+        if (overlay.opaque) {
+          st.splice(start, i - start, end, "overlay " + style);
+          i = start + 2;
+        } else {
+          for (; start < i; start += 2) {
+            var cur = st[start+1];
+            st[start+1] = (cur ? cur + " " : "") + "overlay " + style;
+          }
+        }
+      }, lineClasses);
+      context.state = state;
+      context.baseTokens = null;
+      context.baseTokenPos = 1;
+    };
+
+    for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );
+
+    return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
+  }
+
+  function getLineStyles(cm, line, updateFrontier) {
+    if (!line.styles || line.styles[0] != cm.state.modeGen) {
+      var context = getContextBefore(cm, lineNo(line));
+      var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state);
+      var result = highlightLine(cm, line, context);
+      if (resetState) { context.state = resetState; }
+      line.stateAfter = context.save(!resetState);
+      line.styles = result.styles;
+      if (result.classes) { line.styleClasses = result.classes; }
+      else if (line.styleClasses) { line.styleClasses = null; }
+      if (updateFrontier === cm.doc.highlightFrontier)
+        { cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier); }
+    }
+    return line.styles
+  }
+
+  function getContextBefore(cm, n, precise) {
+    var doc = cm.doc, display = cm.display;
+    if (!doc.mode.startState) { return new Context(doc, true, n) }
+    var start = findStartLine(cm, n, precise);
+    var saved = start > doc.first && getLine(doc, start - 1).stateAfter;
+    var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start);
+
+    doc.iter(start, n, function (line) {
+      processLine(cm, line.text, context);
+      var pos = context.line;
+      line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null;
+      context.nextLine();
+    });
+    if (precise) { doc.modeFrontier = context.line; }
+    return context
+  }
+
+  // Lightweight form of highlight -- proceed over this line and
+  // update state, but don't save a style array. Used for lines that
+  // aren't currently visible.
+  function processLine(cm, text, context, startAt) {
+    var mode = cm.doc.mode;
+    var stream = new StringStream(text, cm.options.tabSize, context);
+    stream.start = stream.pos = startAt || 0;
+    if (text == "") { callBlankLine(mode, context.state); }
+    while (!stream.eol()) {
+      readToken(mode, stream, context.state);
+      stream.start = stream.pos;
+    }
+  }
+
+  function callBlankLine(mode, state) {
+    if (mode.blankLine) { return mode.blankLine(state) }
+    if (!mode.innerMode) { return }
+    var inner = innerMode(mode, state);
+    if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
+  }
+
+  function readToken(mode, stream, state, inner) {
+    for (var i = 0; i < 10; i++) {
+      if (inner) { inner[0] = innerMode(mode, state).mode; }
+      var style = mode.token(stream, state);
+      if (stream.pos > stream.start) { return style }
+    }
+    throw new Error("Mode " + mode.name + " failed to advance stream.")
+  }
+
+  var Token = function(stream, type, state) {
+    this.start = stream.start; this.end = stream.pos;
+    this.string = stream.current();
+    this.type = type || null;
+    this.state = state;
+  };
+
+  // Utility for getTokenAt and getLineTokens
+  function takeToken(cm, pos, precise, asArray) {
+    var doc = cm.doc, mode = doc.mode, style;
+    pos = clipPos(doc, pos);
+    var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise);
+    var stream = new StringStream(line.text, cm.options.tabSize, context), tokens;
+    if (asArray) { tokens = []; }
+    while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
+      stream.start = stream.pos;
+      style = readToken(mode, stream, context.state);
+      if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))); }
+    }
+    return asArray ? tokens : new Token(stream, style, context.state)
+  }
+
+  function extractLineClasses(type, output) {
+    if (type) { for (;;) {
+      var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
+      if (!lineClass) { break }
+      type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
+      var prop = lineClass[1] ? "bgClass" : "textClass";
+      if (output[prop] == null)
+        { output[prop] = lineClass[2]; }
+      else if (!(new RegExp("(?:^|\\s)" + lineClass[2] + "(?:$|\\s)")).test(output[prop]))
+        { output[prop] += " " + lineClass[2]; }
+    } }
+    return type
+  }
+
+  // Run the given mode's parser over a line, calling f for each token.
+  function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
+    var flattenSpans = mode.flattenSpans;
+    if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans; }
+    var curStart = 0, curStyle = null;
+    var stream = new StringStream(text, cm.options.tabSize, context), style;
+    var inner = cm.options.addModeClass && [null];
+    if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses); }
+    while (!stream.eol()) {
+      if (stream.pos > cm.options.maxHighlightLength) {
+        flattenSpans = false;
+        if (forceToEnd) { processLine(cm, text, context, stream.pos); }
+        stream.pos = text.length;
+        style = null;
+      } else {
+        style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses);
+      }
+      if (inner) {
+        var mName = inner[0].name;
+        if (mName) { style = "m-" + (style ? mName + " " + style : mName); }
+      }
+      if (!flattenSpans || curStyle != style) {
+        while (curStart < stream.start) {
+          curStart = Math.min(stream.start, curStart + 5000);
+          f(curStart, curStyle);
+        }
+        curStyle = style;
+      }
+      stream.start = stream.pos;
+    }
+    while (curStart < stream.pos) {
+      // Webkit seems to refuse to render text nodes longer than 57444
+      // characters, and returns inaccurate measurements in nodes
+      // starting around 5000 chars.
+      var pos = Math.min(stream.pos, curStart + 5000);
+      f(pos, curStyle);
+      curStart = pos;
+    }
+  }
+
+  // Finds the line to start with when starting a parse. Tries to
+  // find a line with a stateAfter, so that it can start with a
+  // valid state. If that fails, it returns the line with the
+  // smallest indentation, which tends to need the least context to
+  // parse correctly.
+  function findStartLine(cm, n, precise) {
+    var minindent, minline, doc = cm.doc;
+    var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
+    for (var search = n; search > lim; --search) {
+      if (search <= doc.first) { return doc.first }
+      var line = getLine(doc, search - 1), after = line.stateAfter;
+      if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
+        { return search }
+      var indented = countColumn(line.text, null, cm.options.tabSize);
+      if (minline == null || minindent > indented) {
+        minline = search - 1;
+        minindent = indented;
+      }
+    }
+    return minline
+  }
+
+  function retreatFrontier(doc, n) {
+    doc.modeFrontier = Math.min(doc.modeFrontier, n);
+    if (doc.highlightFrontier < n - 10) { return }
+    var start = doc.first;
+    for (var line = n - 1; line > start; line--) {
+      var saved = getLine(doc, line).stateAfter;
+      // change is on 3
+      // state on line 1 looked ahead 2 -- so saw 3
+      // test 1 + 2 < 3 should cover this
+      if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
+        start = line + 1;
+        break
+      }
+    }
+    doc.highlightFrontier = Math.min(doc.highlightFrontier, start);
+  }
+
+  // Optimize some code when these features are not used.
+  var sawReadOnlySpans = false, sawCollapsedSpans = false;
+
+  function seeReadOnlySpans() {
+    sawReadOnlySpans = true;
+  }
+
+  function seeCollapsedSpans() {
+    sawCollapsedSpans = true;
+  }
+
+  // TEXTMARKER SPANS
+
+  function MarkedSpan(marker, from, to) {
+    this.marker = marker;
+    this.from = from; this.to = to;
+  }
+
+  // Search an array of spans for a span matching the given marker.
+  function getMarkedSpanFor(spans, marker) {
+    if (spans) { for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i];
+      if (span.marker == marker) { return span }
+    } }
+  }
+
+  // Remove a span from an array, returning undefined if no spans are
+  // left (we don't store arrays for lines without spans).
+  function removeMarkedSpan(spans, span) {
+    var r;
+    for (var i = 0; i < spans.length; ++i)
+      { if (spans[i] != span) { (r || (r = [])).push(spans[i]); } }
+    return r
+  }
+
+  // Add a span to a line.
+  function addMarkedSpan(line, span, op) {
+    var inThisOp = op && window.WeakSet && (op.markedSpans || (op.markedSpans = new WeakSet));
+    if (inThisOp && inThisOp.has(line.markedSpans)) {
+      line.markedSpans.push(span);
+    } else {
+      line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
+      if (inThisOp) { inThisOp.add(line.markedSpans); }
+    }
+    span.marker.attachLine(line);
+  }
+
+  // Used for the algorithm that adjusts markers for a change in the
+  // document. These functions cut an array of spans at a given
+  // character position, returning an array of remaining chunks (or
+  // undefined if nothing remains).
+  function markedSpansBefore(old, startCh, isInsert) {
+    var nw;
+    if (old) { for (var i = 0; i < old.length; ++i) {
+      var span = old[i], marker = span.marker;
+      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
+      if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
+        var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh)
+        ;(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
+      }
+    } }
+    return nw
+  }
+  function markedSpansAfter(old, endCh, isInsert) {
+    var nw;
+    if (old) { for (var i = 0; i < old.length; ++i) {
+      var span = old[i], marker = span.marker;
+      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
+      if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
+        var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh)
+        ;(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
+                                              span.to == null ? null : span.to - endCh));
+      }
+    } }
+    return nw
+  }
+
+  // Given a change object, compute the new set of marker spans that
+  // cover the line in which the change took place. Removes spans
+  // entirely within the change, reconnects spans belonging to the
+  // same marker that appear on both sides of the change, and cuts off
+  // spans partially within the change. Returns an array of span
+  // arrays with one element for each line in (after) the change.
+  function stretchSpansOverChange(doc, change) {
+    if (change.full) { return null }
+    var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
+    var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
+    if (!oldFirst && !oldLast) { return null }
+
+    var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
+    // Get the spans that 'stick out' on both sides
+    var first = markedSpansBefore(oldFirst, startCh, isInsert);
+    var last = markedSpansAfter(oldLast, endCh, isInsert);
+
+    // Next, merge those two ends
+    var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
+    if (first) {
+      // Fix up .to properties of first
+      for (var i = 0; i < first.length; ++i) {
+        var span = first[i];
+        if (span.to == null) {
+          var found = getMarkedSpanFor(last, span.marker);
+          if (!found) { span.to = startCh; }
+          else if (sameLine) { span.to = found.to == null ? null : found.to + offset; }
+        }
+      }
+    }
+    if (last) {
+      // Fix up .from in last (or move them into first in case of sameLine)
+      for (var i$1 = 0; i$1 < last.length; ++i$1) {
+        var span$1 = last[i$1];
+        if (span$1.to != null) { span$1.to += offset; }
+        if (span$1.from == null) {
+          var found$1 = getMarkedSpanFor(first, span$1.marker);
+          if (!found$1) {
+            span$1.from = offset;
+            if (sameLine) { (first || (first = [])).push(span$1); }
+          }
+        } else {
+          span$1.from += offset;
+          if (sameLine) { (first || (first = [])).push(span$1); }
+        }
+      }
+    }
+    // Make sure we didn't create any zero-length spans
+    if (first) { first = clearEmptySpans(first); }
+    if (last && last != first) { last = clearEmptySpans(last); }
+
+    var newMarkers = [first];
+    if (!sameLine) {
+      // Fill gap with whole-line-spans
+      var gap = change.text.length - 2, gapMarkers;
+      if (gap > 0 && first)
+        { for (var i$2 = 0; i$2 < first.length; ++i$2)
+          { if (first[i$2].to == null)
+            { (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)); } } }
+      for (var i$3 = 0; i$3 < gap; ++i$3)
+        { newMarkers.push(gapMarkers); }
+      newMarkers.push(last);
+    }
+    return newMarkers
+  }
+
+  // Remove spans that are empty and don't have a clearWhenEmpty
+  // option of false.
+  function clearEmptySpans(spans) {
+    for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i];
+      if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
+        { spans.splice(i--, 1); }
+    }
+    if (!spans.length) { return null }
+    return spans
+  }
+
+  // Used to 'clip' out readOnly ranges when making a change.
+  function removeReadOnlyRanges(doc, from, to) {
+    var markers = null;
+    doc.iter(from.line, to.line + 1, function (line) {
+      if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+        var mark = line.markedSpans[i].marker;
+        if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
+          { (markers || (markers = [])).push(mark); }
+      } }
+    });
+    if (!markers) { return null }
+    var parts = [{from: from, to: to}];
+    for (var i = 0; i < markers.length; ++i) {
+      var mk = markers[i], m = mk.find(0);
+      for (var j = 0; j < parts.length; ++j) {
+        var p = parts[j];
+        if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
+        var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
+        if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
+          { newParts.push({from: p.from, to: m.from}); }
+        if (dto > 0 || !mk.inclusiveRight && !dto)
+          { newParts.push({from: m.to, to: p.to}); }
+        parts.splice.apply(parts, newParts);
+        j += newParts.length - 3;
+      }
+    }
+    return parts
+  }
+
+  // Connect or disconnect spans from a line.
+  function detachMarkedSpans(line) {
+    var spans = line.markedSpans;
+    if (!spans) { return }
+    for (var i = 0; i < spans.length; ++i)
+      { spans[i].marker.detachLine(line); }
+    line.markedSpans = null;
+  }
+  function attachMarkedSpans(line, spans) {
+    if (!spans) { return }
+    for (var i = 0; i < spans.length; ++i)
+      { spans[i].marker.attachLine(line); }
+    line.markedSpans = spans;
+  }
+
+  // Helpers used when computing which overlapping collapsed span
+  // counts as the larger one.
+  function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
+  function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }
+
+  // Returns a number indicating which of two overlapping collapsed
+  // spans is larger (and thus includes the other). Falls back to
+  // comparing ids when the spans cover exactly the same range.
+  function compareCollapsedMarkers(a, b) {
+    var lenDiff = a.lines.length - b.lines.length;
+    if (lenDiff != 0) { return lenDiff }
+    var aPos = a.find(), bPos = b.find();
+    var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
+    if (fromCmp) { return -fromCmp }
+    var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
+    if (toCmp) { return toCmp }
+    return b.id - a.id
+  }
+
+  // Find out whether a line ends or starts in a collapsed span. If
+  // so, return the marker for that span.
+  function collapsedSpanAtSide(line, start) {
+    var sps = sawCollapsedSpans && line.markedSpans, found;
+    if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+      sp = sps[i];
+      if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
+          (!found || compareCollapsedMarkers(found, sp.marker) < 0))
+        { found = sp.marker; }
+    } }
+    return found
+  }
+  function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
+  function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }
+
+  function collapsedSpanAround(line, ch) {
+    var sps = sawCollapsedSpans && line.markedSpans, found;
+    if (sps) { for (var i = 0; i < sps.length; ++i) {
+      var sp = sps[i];
+      if (sp.marker.collapsed && (sp.from == null || sp.from < ch) && (sp.to == null || sp.to > ch) &&
+          (!found || compareCollapsedMarkers(found, sp.marker) < 0)) { found = sp.marker; }
+    } }
+    return found
+  }
+
+  // Test whether there exists a collapsed span that partially
+  // overlaps (covers the start or end, but not both) of a new span.
+  // Such overlap is not allowed.
+  function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
+    var line = getLine(doc, lineNo);
+    var sps = sawCollapsedSpans && line.markedSpans;
+    if (sps) { for (var i = 0; i < sps.length; ++i) {
+      var sp = sps[i];
+      if (!sp.marker.collapsed) { continue }
+      var found = sp.marker.find(0);
+      var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
+      var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
+      if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
+      if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
+          fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
+        { return true }
+    } }
+  }
+
+  // A visual line is a line as drawn on the screen. Folding, for
+  // example, can cause multiple logical lines to appear on the same
+  // visual line. This finds the start of the visual line that the
+  // given line is part of (usually that is the line itself).
+  function visualLine(line) {
+    var merged;
+    while (merged = collapsedSpanAtStart(line))
+      { line = merged.find(-1, true).line; }
+    return line
+  }
+
+  function visualLineEnd(line) {
+    var merged;
+    while (merged = collapsedSpanAtEnd(line))
+      { line = merged.find(1, true).line; }
+    return line
+  }
+
+  // Returns an array of logical lines that continue the visual line
+  // started by the argument, or undefined if there are no such lines.
+  function visualLineContinued(line) {
+    var merged, lines;
+    while (merged = collapsedSpanAtEnd(line)) {
+      line = merged.find(1, true).line
+      ;(lines || (lines = [])).push(line);
+    }
+    return lines
+  }
+
+  // Get the line number of the start of the visual line that the
+  // given line number is part of.
+  function visualLineNo(doc, lineN) {
+    var line = getLine(doc, lineN), vis = visualLine(line);
+    if (line == vis) { return lineN }
+    return lineNo(vis)
+  }
+
+  // Get the line number of the start of the next visual line after
+  // the given line.
+  function visualLineEndNo(doc, lineN) {
+    if (lineN > doc.lastLine()) { return lineN }
+    var line = getLine(doc, lineN), merged;
+    if (!lineIsHidden(doc, line)) { return lineN }
+    while (merged = collapsedSpanAtEnd(line))
+      { line = merged.find(1, true).line; }
+    return lineNo(line) + 1
+  }
+
+  // Compute whether a line is hidden. Lines count as hidden when they
+  // are part of a visual line that starts with another line, or when
+  // they are entirely covered by collapsed, non-widget span.
+  function lineIsHidden(doc, line) {
+    var sps = sawCollapsedSpans && line.markedSpans;
+    if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+      sp = sps[i];
+      if (!sp.marker.collapsed) { continue }
+      if (sp.from == null) { return true }
+      if (sp.marker.widgetNode) { continue }
+      if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
+        { return true }
+    } }
+  }
+  function lineIsHiddenInner(doc, line, span) {
+    if (span.to == null) {
+      var end = span.marker.find(1, true);
+      return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
+    }
+    if (span.marker.inclusiveRight && span.to == line.text.length)
+      { return true }
+    for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
+      sp = line.markedSpans[i];
+      if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
+          (sp.to == null || sp.to != span.from) &&
+          (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
+          lineIsHiddenInner(doc, line, sp)) { return true }
+    }
+  }
+
+  // Find the height above the given line.
+  function heightAtLine(lineObj) {
+    lineObj = visualLine(lineObj);
+
+    var h = 0, chunk = lineObj.parent;
+    for (var i = 0; i < chunk.lines.length; ++i) {
+      var line = chunk.lines[i];
+      if (line == lineObj) { break }
+      else { h += line.height; }
+    }
+    for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
+      for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
+        var cur = p.children[i$1];
+        if (cur == chunk) { break }
+        else { h += cur.height; }
+      }
+    }
+    return h
+  }
+
+  // Compute the character length of a line, taking into account
+  // collapsed ranges (see markText) that might hide parts, and join
+  // other lines onto it.
+  function lineLength(line) {
+    if (line.height == 0) { return 0 }
+    var len = line.text.length, merged, cur = line;
+    while (merged = collapsedSpanAtStart(cur)) {
+      var found = merged.find(0, true);
+      cur = found.from.line;
+      len += found.from.ch - found.to.ch;
+    }
+    cur = line;
+    while (merged = collapsedSpanAtEnd(cur)) {
+      var found$1 = merged.find(0, true);
+      len -= cur.text.length - found$1.from.ch;
+      cur = found$1.to.line;
+      len += cur.text.length - found$1.to.ch;
+    }
+    return len
+  }
+
+  // Find the longest line in the document.
+  function findMaxLine(cm) {
+    var d = cm.display, doc = cm.doc;
+    d.maxLine = getLine(doc, doc.first);
+    d.maxLineLength = lineLength(d.maxLine);
+    d.maxLineChanged = true;
+    doc.iter(function (line) {
+      var len = lineLength(line);
+      if (len > d.maxLineLength) {
+        d.maxLineLength = len;
+        d.maxLine = line;
+      }
+    });
+  }
+
+  // LINE DATA STRUCTURE
+
+  // Line objects. These hold state related to a line, including
+  // highlighting info (the styles array).
+  var Line = function(text, markedSpans, estimateHeight) {
+    this.text = text;
+    attachMarkedSpans(this, markedSpans);
+    this.height = estimateHeight ? estimateHeight(this) : 1;
+  };
+
+  Line.prototype.lineNo = function () { return lineNo(this) };
+  eventMixin(Line);
+
+  // Change the content (text, markers) of a line. Automatically
+  // invalidates cached information and tries to re-estimate the
+  // line's height.
+  function updateLine(line, text, markedSpans, estimateHeight) {
+    line.text = text;
+    if (line.stateAfter) { line.stateAfter = null; }
+    if (line.styles) { line.styles = null; }
+    if (line.order != null) { line.order = null; }
+    detachMarkedSpans(line);
+    attachMarkedSpans(line, markedSpans);
+    var estHeight = estimateHeight ? estimateHeight(line) : 1;
+    if (estHeight != line.height) { updateLineHeight(line, estHeight); }
+  }
+
+  // Detach a line from the document tree and its markers.
+  function cleanUpLine(line) {
+    line.parent = null;
+    detachMarkedSpans(line);
+  }
+
+  // Convert a style as returned by a mode (either null, or a string
+  // containing one or more styles) to a CSS style. This is cached,
+  // and also looks for line-wide styles.
+  var styleToClassCache = {}, styleToClassCacheWithMode = {};
+  function interpretTokenStyle(style, options) {
+    if (!style || /^\s*$/.test(style)) { return null }
+    var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
+    return cache[style] ||
+      (cache[style] = style.replace(/\S+/g, "cm-$&"))
+  }
+
+  // Render the DOM representation of the text of a line. Also builds
+  // up a 'line map', which points at the DOM nodes that represent
+  // specific stretches of text, and is used by the measuring code.
+  // The returned object contains the DOM node, this map, and
+  // information about line-wide styles that were set by the mode.
+  function buildLineContent(cm, lineView) {
+    // The padding-right forces the element to have a 'border', which
+    // is needed on Webkit to be able to get line-level bounding
+    // rectangles for it (in measureChar).
+    var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null);
+    var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
+                   col: 0, pos: 0, cm: cm,
+                   trailingSpace: false,
+                   splitSpaces: cm.getOption("lineWrapping")};
+    lineView.measure = {};
+
+    // Iterate over the logical lines that make up this visual line.
+    for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
+      var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0);
+      builder.pos = 0;
+      builder.addToken = buildToken;
+      // Optionally wire in some hacks into the token-rendering
+      // algorithm, to deal with browser quirks.
+      if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
+        { builder.addToken = buildTokenBadBidi(builder.addToken, order); }
+      builder.map = [];
+      var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
+      insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
+      if (line.styleClasses) {
+        if (line.styleClasses.bgClass)
+          { builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || ""); }
+        if (line.styleClasses.textClass)
+          { builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || ""); }
+      }
+
+      // Ensure at least a single node is present, for measuring.
+      if (builder.map.length == 0)
+        { builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))); }
+
+      // Store the map and a cache object for the current logical line
+      if (i == 0) {
+        lineView.measure.map = builder.map;
+        lineView.measure.cache = {};
+      } else {
+  (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
+        ;(lineView.measure.caches || (lineView.measure.caches = [])).push({});
+      }
+    }
+
+    // See issue #2901
+    if (webkit) {
+      var last = builder.content.lastChild;
+      if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
+        { builder.content.className = "cm-tab-wrap-hack"; }
+    }
+
+    signal(cm, "renderLine", cm, lineView.line, builder.pre);
+    if (builder.pre.className)
+      { builder.textClass = joinClasses(builder.pre.className, builder.textClass || ""); }
+
+    return builder
+  }
+
+  function defaultSpecialCharPlaceholder(ch) {
+    var token = elt("span", "\u2022", "cm-invalidchar");
+    token.title = "\\u" + ch.charCodeAt(0).toString(16);
+    token.setAttribute("aria-label", token.title);
+    return token
+  }
+
+  // Build up the DOM representation for a single token, and add it to
+  // the line map. Takes care to render special characters separately.
+  function buildToken(builder, text, style, startStyle, endStyle, css, attributes) {
+    if (!text) { return }
+    var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text;
+    var special = builder.cm.state.specialChars, mustWrap = false;
+    var content;
+    if (!special.test(text)) {
+      builder.col += text.length;
+      content = document.createTextNode(displayText);
+      builder.map.push(builder.pos, builder.pos + text.length, content);
+      if (ie && ie_version < 9) { mustWrap = true; }
+      builder.pos += text.length;
+    } else {
+      content = document.createDocumentFragment();
+      var pos = 0;
+      while (true) {
+        special.lastIndex = pos;
+        var m = special.exec(text);
+        var skipped = m ? m.index - pos : text.length - pos;
+        if (skipped) {
+          var txt = document.createTextNode(displayText.slice(pos, pos + skipped));
+          if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])); }
+          else { content.appendChild(txt); }
+          builder.map.push(builder.pos, builder.pos + skipped, txt);
+          builder.col += skipped;
+          builder.pos += skipped;
+        }
+        if (!m) { break }
+        pos += skipped + 1;
+        var txt$1 = (void 0);
+        if (m[0] == "\t") {
+          var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
+          txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
+          txt$1.setAttribute("role", "presentation");
+          txt$1.setAttribute("cm-text", "\t");
+          builder.col += tabWidth;
+        } else if (m[0] == "\r" || m[0] == "\n") {
+          txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
+          txt$1.setAttribute("cm-text", m[0]);
+          builder.col += 1;
+        } else {
+          txt$1 = builder.cm.options.specialCharPlaceholder(m[0]);
+          txt$1.setAttribute("cm-text", m[0]);
+          if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])); }
+          else { content.appendChild(txt$1); }
+          builder.col += 1;
+        }
+        builder.map.push(builder.pos, builder.pos + 1, txt$1);
+        builder.pos++;
+      }
+    }
+    builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32;
+    if (style || startStyle || endStyle || mustWrap || css || attributes) {
+      var fullStyle = style || "";
+      if (startStyle) { fullStyle += startStyle; }
+      if (endStyle) { fullStyle += endStyle; }
+      var token = elt("span", [content], fullStyle, css);
+      if (attributes) {
+        for (var attr in attributes) { if (attributes.hasOwnProperty(attr) && attr != "style" && attr != "class")
+          { token.setAttribute(attr, attributes[attr]); } }
+      }
+      return builder.content.appendChild(token)
+    }
+    builder.content.appendChild(content);
+  }
+
+  // Change some spaces to NBSP to prevent the browser from collapsing
+  // trailing spaces at the end of a line when rendering text (issue #1362).
+  function splitSpaces(text, trailingBefore) {
+    if (text.length > 1 && !/  /.test(text)) { return text }
+    var spaceBefore = trailingBefore, result = "";
+    for (var i = 0; i < text.length; i++) {
+      var ch = text.charAt(i);
+      if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
+        { ch = "\u00a0"; }
+      result += ch;
+      spaceBefore = ch == " ";
+    }
+    return result
+  }
+
+  // Work around nonsense dimensions being reported for stretches of
+  // right-to-left text.
+  function buildTokenBadBidi(inner, order) {
+    return function (builder, text, style, startStyle, endStyle, css, attributes) {
+      style = style ? style + " cm-force-border" : "cm-force-border";
+      var start = builder.pos, end = start + text.length;
+      for (;;) {
+        // Find the part that overlaps with the start of this text
+        var part = (void 0);
+        for (var i = 0; i < order.length; i++) {
+          part = order[i];
+          if (part.to > start && part.from <= start) { break }
+        }
+        if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, css, attributes) }
+        inner(builder, text.slice(0, part.to - start), style, startStyle, null, css, attributes);
+        startStyle = null;
+        text = text.slice(part.to - start);
+        start = part.to;
+      }
+    }
+  }
+
+  function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
+    var widget = !ignoreWidget && marker.widgetNode;
+    if (widget) { builder.map.push(builder.pos, builder.pos + size, widget); }
+    if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
+      if (!widget)
+        { widget = builder.content.appendChild(document.createElement("span")); }
+      widget.setAttribute("cm-marker", marker.id);
+    }
+    if (widget) {
+      builder.cm.display.input.setUneditable(widget);
+      builder.content.appendChild(widget);
+    }
+    builder.pos += size;
+    builder.trailingSpace = false;
+  }
+
+  // Outputs a number of spans to make up a line, taking highlighting
+  // and marked text into account.
+  function insertLineContent(line, builder, styles) {
+    var spans = line.markedSpans, allText = line.text, at = 0;
+    if (!spans) {
+      for (var i$1 = 1; i$1 < styles.length; i$1+=2)
+        { builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)); }
+      return
+    }
+
+    var len = allText.length, pos = 0, i = 1, text = "", style, css;
+    var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, collapsed, attributes;
+    for (;;) {
+      if (nextChange == pos) { // Update current marker set
+        spanStyle = spanEndStyle = spanStartStyle = css = "";
+        attributes = null;
+        collapsed = null; nextChange = Infinity;
+        var foundBookmarks = [], endStyles = (void 0);
+        for (var j = 0; j < spans.length; ++j) {
+          var sp = spans[j], m = sp.marker;
+          if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
+            foundBookmarks.push(m);
+          } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
+            if (sp.to != null && sp.to != pos && nextChange > sp.to) {
+              nextChange = sp.to;
+              spanEndStyle = "";
+            }
+            if (m.className) { spanStyle += " " + m.className; }
+            if (m.css) { css = (css ? css + ";" : "") + m.css; }
+            if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle; }
+            if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to); }
+            // support for the old title property
+            // https://github.com/codemirror/CodeMirror/pull/5673
+            if (m.title) { (attributes || (attributes = {})).title = m.title; }
+            if (m.attributes) {
+              for (var attr in m.attributes)
+                { (attributes || (attributes = {}))[attr] = m.attributes[attr]; }
+            }
+            if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
+              { collapsed = sp; }
+          } else if (sp.from > pos && nextChange > sp.from) {
+            nextChange = sp.from;
+          }
+        }
+        if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
+          { if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1]; } } }
+
+        if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
+          { buildCollapsedSpan(builder, 0, foundBookmarks[j$2]); } }
+        if (collapsed && (collapsed.from || 0) == pos) {
+          buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
+                             collapsed.marker, collapsed.from == null);
+          if (collapsed.to == null) { return }
+          if (collapsed.to == pos) { collapsed = false; }
+        }
+      }
+      if (pos >= len) { break }
+
+      var upto = Math.min(len, nextChange);
+      while (true) {
+        if (text) {
+          var end = pos + text.length;
+          if (!collapsed) {
+            var tokenText = end > upto ? text.slice(0, upto - pos) : text;
+            builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
+                             spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", css, attributes);
+          }
+          if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
+          pos = end;
+          spanStartStyle = "";
+        }
+        text = allText.slice(at, at = styles[i++]);
+        style = interpretTokenStyle(styles[i++], builder.cm.options);
+      }
+    }
+  }
+
+
+  // These objects are used to represent the visible (currently drawn)
+  // part of the document. A LineView may correspond to multiple
+  // logical lines, if those are connected by collapsed ranges.
+  function LineView(doc, line, lineN) {
+    // The starting line
+    this.line = line;
+    // Continuing lines, if any
+    this.rest = visualLineContinued(line);
+    // Number of logical lines in this visual line
+    this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
+    this.node = this.text = null;
+    this.hidden = lineIsHidden(doc, line);
+  }
+
+  // Create a range of LineView objects for the given lines.
+  function buildViewArray(cm, from, to) {
+    var array = [], nextPos;
+    for (var pos = from; pos < to; pos = nextPos) {
+      var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
+      nextPos = pos + view.size;
+      array.push(view);
+    }
+    return array
+  }
+
+  var operationGroup = null;
+
+  function pushOperation(op) {
+    if (operationGroup) {
+      operationGroup.ops.push(op);
+    } else {
+      op.ownsGroup = operationGroup = {
+        ops: [op],
+        delayedCallbacks: []
+      };
+    }
+  }
+
+  function fireCallbacksForOps(group) {
+    // Calls delayed callbacks and cursorActivity handlers until no
+    // new ones appear
+    var callbacks = group.delayedCallbacks, i = 0;
+    do {
+      for (; i < callbacks.length; i++)
+        { callbacks[i].call(null); }
+      for (var j = 0; j < group.ops.length; j++) {
+        var op = group.ops[j];
+        if (op.cursorActivityHandlers)
+          { while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
+            { op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm); } }
+      }
+    } while (i < callbacks.length)
+  }
+
+  function finishOperation(op, endCb) {
+    var group = op.ownsGroup;
+    if (!group) { return }
+
+    try { fireCallbacksForOps(group); }
+    finally {
+      operationGroup = null;
+      endCb(group);
+    }
+  }
+
+  var orphanDelayedCallbacks = null;
+
+  // Often, we want to signal events at a point where we are in the
+  // middle of some work, but don't want the handler to start calling
+  // other methods on the editor, which might be in an inconsistent
+  // state or simply not expect any other events to happen.
+  // signalLater looks whether there are any handlers, and schedules
+  // them to be executed when the last operation ends, or, if no
+  // operation is active, when a timeout fires.
+  function signalLater(emitter, type /*, values...*/) {
+    var arr = getHandlers(emitter, type);
+    if (!arr.length) { return }
+    var args = Array.prototype.slice.call(arguments, 2), list;
+    if (operationGroup) {
+      list = operationGroup.delayedCallbacks;
+    } else if (orphanDelayedCallbacks) {
+      list = orphanDelayedCallbacks;
+    } else {
+      list = orphanDelayedCallbacks = [];
+      setTimeout(fireOrphanDelayed, 0);
+    }
+    var loop = function ( i ) {
+      list.push(function () { return arr[i].apply(null, args); });
+    };
+
+    for (var i = 0; i < arr.length; ++i)
+      loop( i );
+  }
+
+  function fireOrphanDelayed() {
+    var delayed = orphanDelayedCallbacks;
+    orphanDelayedCallbacks = null;
+    for (var i = 0; i < delayed.length; ++i) { delayed[i](); }
+  }
+
+  // When an aspect of a line changes, a string is added to
+  // lineView.changes. This updates the relevant part of the line's
+  // DOM structure.
+  function updateLineForChanges(cm, lineView, lineN, dims) {
+    for (var j = 0; j < lineView.changes.length; j++) {
+      var type = lineView.changes[j];
+      if (type == "text") { updateLineText(cm, lineView); }
+      else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims); }
+      else if (type == "class") { updateLineClasses(cm, lineView); }
+      else if (type == "widget") { updateLineWidgets(cm, lineView, dims); }
+    }
+    lineView.changes = null;
+  }
+
+  // Lines with gutter elements, widgets or a background class need to
+  // be wrapped, and have the extra elements added to the wrapper div
+  function ensureLineWrapped(lineView) {
+    if (lineView.node == lineView.text) {
+      lineView.node = elt("div", null, null, "position: relative");
+      if (lineView.text.parentNode)
+        { lineView.text.parentNode.replaceChild(lineView.node, lineView.text); }
+      lineView.node.appendChild(lineView.text);
+      if (ie && ie_version < 8) { lineView.node.style.zIndex = 2; }
+    }
+    return lineView.node
+  }
+
+  function updateLineBackground(cm, lineView) {
+    var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
+    if (cls) { cls += " CodeMirror-linebackground"; }
+    if (lineView.background) {
+      if (cls) { lineView.background.className = cls; }
+      else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
+    } else if (cls) {
+      var wrap = ensureLineWrapped(lineView);
+      lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
+      cm.display.input.setUneditable(lineView.background);
+    }
+  }
+
+  // Wrapper around buildLineContent which will reuse the structure
+  // in display.externalMeasured when possible.
+  function getLineContent(cm, lineView) {
+    var ext = cm.display.externalMeasured;
+    if (ext && ext.line == lineView.line) {
+      cm.display.externalMeasured = null;
+      lineView.measure = ext.measure;
+      return ext.built
+    }
+    return buildLineContent(cm, lineView)
+  }
+
+  // Redraw the line's text. Interacts with the background and text
+  // classes because the mode may output tokens that influence these
+  // classes.
+  function updateLineText(cm, lineView) {
+    var cls = lineView.text.className;
+    var built = getLineContent(cm, lineView);
+    if (lineView.text == lineView.node) { lineView.node = built.pre; }
+    lineView.text.parentNode.replaceChild(built.pre, lineView.text);
+    lineView.text = built.pre;
+    if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
+      lineView.bgClass = built.bgClass;
+      lineView.textClass = built.textClass;
+      updateLineClasses(cm, lineView);
+    } else if (cls) {
+      lineView.text.className = cls;
+    }
+  }
+
+  function updateLineClasses(cm, lineView) {
+    updateLineBackground(cm, lineView);
+    if (lineView.line.wrapClass)
+      { ensureLineWrapped(lineView).className = lineView.line.wrapClass; }
+    else if (lineView.node != lineView.text)
+      { lineView.node.className = ""; }
+    var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
+    lineView.text.className = textClass || "";
+  }
+
+  function updateLineGutter(cm, lineView, lineN, dims) {
+    if (lineView.gutter) {
+      lineView.node.removeChild(lineView.gutter);
+      lineView.gutter = null;
+    }
+    if (lineView.gutterBackground) {
+      lineView.node.removeChild(lineView.gutterBackground);
+      lineView.gutterBackground = null;
+    }
+    if (lineView.line.gutterClass) {
+      var wrap = ensureLineWrapped(lineView);
+      lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
+                                      ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"));
+      cm.display.input.setUneditable(lineView.gutterBackground);
+      wrap.insertBefore(lineView.gutterBackground, lineView.text);
+    }
+    var markers = lineView.line.gutterMarkers;
+    if (cm.options.lineNumbers || markers) {
+      var wrap$1 = ensureLineWrapped(lineView);
+      var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"));
+      gutterWrap.setAttribute("aria-hidden", "true");
+      cm.display.input.setUneditable(gutterWrap);
+      wrap$1.insertBefore(gutterWrap, lineView.text);
+      if (lineView.line.gutterClass)
+        { gutterWrap.className += " " + lineView.line.gutterClass; }
+      if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
+        { lineView.lineNumber = gutterWrap.appendChild(
+          elt("div", lineNumberFor(cm.options, lineN),
+              "CodeMirror-linenumber CodeMirror-gutter-elt",
+              ("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))); }
+      if (markers) { for (var k = 0; k < cm.display.gutterSpecs.length; ++k) {
+        var id = cm.display.gutterSpecs[k].className, found = markers.hasOwnProperty(id) && markers[id];
+        if (found)
+          { gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
+                                     ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))); }
+      } }
+    }
+  }
+
+  function updateLineWidgets(cm, lineView, dims) {
+    if (lineView.alignable) { lineView.alignable = null; }
+    var isWidget = classTest("CodeMirror-linewidget");
+    for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
+      next = node.nextSibling;
+      if (isWidget.test(node.className)) { lineView.node.removeChild(node); }
+    }
+    insertLineWidgets(cm, lineView, dims);
+  }
+
+  // Build a line's DOM representation from scratch
+  function buildLineElement(cm, lineView, lineN, dims) {
+    var built = getLineContent(cm, lineView);
+    lineView.text = lineView.node = built.pre;
+    if (built.bgClass) { lineView.bgClass = built.bgClass; }
+    if (built.textClass) { lineView.textClass = built.textClass; }
+
+    updateLineClasses(cm, lineView);
+    updateLineGutter(cm, lineView, lineN, dims);
+    insertLineWidgets(cm, lineView, dims);
+    return lineView.node
+  }
+
+  // A lineView may contain multiple logical lines (when merged by
+  // collapsed spans). The widgets for all of them need to be drawn.
+  function insertLineWidgets(cm, lineView, dims) {
+    insertLineWidgetsFor(cm, lineView.line, lineView, dims, true);
+    if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+      { insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false); } }
+  }
+
+  function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
+    if (!line.widgets) { return }
+    var wrap = ensureLineWrapped(lineView);
+    for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
+      var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget" + (widget.className ? " " + widget.className : ""));
+      if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true"); }
+      positionLineWidget(widget, node, lineView, dims);
+      cm.display.input.setUneditable(node);
+      if (allowAbove && widget.above)
+        { wrap.insertBefore(node, lineView.gutter || lineView.text); }
+      else
+        { wrap.appendChild(node); }
+      signalLater(widget, "redraw");
+    }
+  }
+
+  function positionLineWidget(widget, node, lineView, dims) {
+    if (widget.noHScroll) {
+  (lineView.alignable || (lineView.alignable = [])).push(node);
+      var width = dims.wrapperWidth;
+      node.style.left = dims.fixedPos + "px";
+      if (!widget.coverGutter) {
+        width -= dims.gutterTotalWidth;
+        node.style.paddingLeft = dims.gutterTotalWidth + "px";
+      }
+      node.style.width = width + "px";
+    }
+    if (widget.coverGutter) {
+      node.style.zIndex = 5;
+      node.style.position = "relative";
+      if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px"; }
+    }
+  }
+
+  function widgetHeight(widget) {
+    if (widget.height != null) { return widget.height }
+    var cm = widget.doc.cm;
+    if (!cm) { return 0 }
+    if (!contains(document.body, widget.node)) {
+      var parentStyle = "position: relative;";
+      if (widget.coverGutter)
+        { parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;"; }
+      if (widget.noHScroll)
+        { parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;"; }
+      removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
+    }
+    return widget.height = widget.node.parentNode.offsetHeight
+  }
+
+  // Return true when the given mouse event happened in a widget
+  function eventInWidget(display, e) {
+    for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
+      if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
+          (n.parentNode == display.sizer && n != display.mover))
+        { return true }
+    }
+  }
+
+  // POSITION MEASUREMENT
+
+  function paddingTop(display) {return display.lineSpace.offsetTop}
+  function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
+  function paddingH(display) {
+    if (display.cachedPaddingH) { return display.cachedPaddingH }
+    var e = removeChildrenAndAdd(display.measure, elt("pre", "x", "CodeMirror-line-like"));
+    var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
+    var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
+    if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data; }
+    return data
+  }
+
+  function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
+  function displayWidth(cm) {
+    return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
+  }
+  function displayHeight(cm) {
+    return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
+  }
+
+  // Ensure the lineView.wrapping.heights array is populated. This is
+  // an array of bottom offsets for the lines that make up a drawn
+  // line. When lineWrapping is on, there might be more than one
+  // height.
+  function ensureLineHeights(cm, lineView, rect) {
+    var wrapping = cm.options.lineWrapping;
+    var curWidth = wrapping && displayWidth(cm);
+    if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
+      var heights = lineView.measure.heights = [];
+      if (wrapping) {
+        lineView.measure.width = curWidth;
+        var rects = lineView.text.firstChild.getClientRects();
+        for (var i = 0; i < rects.length - 1; i++) {
+          var cur = rects[i], next = rects[i + 1];
+          if (Math.abs(cur.bottom - next.bottom) > 2)
+            { heights.push((cur.bottom + next.top) / 2 - rect.top); }
+        }
+      }
+      heights.push(rect.bottom - rect.top);
+    }
+  }
+
+  // Find a line map (mapping character offsets to text nodes) and a
+  // measurement cache for the given line number. (A line view might
+  // contain multiple lines when collapsed ranges are present.)
+  function mapFromLineView(lineView, line, lineN) {
+    if (lineView.line == line)
+      { return {map: lineView.measure.map, cache: lineView.measure.cache} }
+    for (var i = 0; i < lineView.rest.length; i++)
+      { if (lineView.rest[i] == line)
+        { return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
+    for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
+      { if (lineNo(lineView.rest[i$1]) > lineN)
+        { return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
+  }
+
+  // Render a line into the hidden node display.externalMeasured. Used
+  // when measurement is needed for a line that's not in the viewport.
+  function updateExternalMeasurement(cm, line) {
+    line = visualLine(line);
+    var lineN = lineNo(line);
+    var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
+    view.lineN = lineN;
+    var built = view.built = buildLineContent(cm, view);
+    view.text = built.pre;
+    removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
+    return view
+  }
+
+  // Get a {top, bottom, left, right} box (in line-local coordinates)
+  // for a given character.
+  function measureChar(cm, line, ch, bias) {
+    return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
+  }
+
+  // Find a line view that corresponds to the given line number.
+  function findViewForLine(cm, lineN) {
+    if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
+      { return cm.display.view[findViewIndex(cm, lineN)] }
+    var ext = cm.display.externalMeasured;
+    if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
+      { return ext }
+  }
+
+  // Measurement can be split in two steps, the set-up work that
+  // applies to the whole line, and the measurement of the actual
+  // character. Functions like coordsChar, that need to do a lot of
+  // measurements in a row, can thus ensure that the set-up work is
+  // only done once.
+  function prepareMeasureForLine(cm, line) {
+    var lineN = lineNo(line);
+    var view = findViewForLine(cm, lineN);
+    if (view && !view.text) {
+      view = null;
+    } else if (view && view.changes) {
+      updateLineForChanges(cm, view, lineN, getDimensions(cm));
+      cm.curOp.forceUpdate = true;
+    }
+    if (!view)
+      { view = updateExternalMeasurement(cm, line); }
+
+    var info = mapFromLineView(view, line, lineN);
+    return {
+      line: line, view: view, rect: null,
+      map: info.map, cache: info.cache, before: info.before,
+      hasHeights: false
+    }
+  }
+
+  // Given a prepared measurement object, measures the position of an
+  // actual character (or fetches it from the cache).
+  function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
+    if (prepared.before) { ch = -1; }
+    var key = ch + (bias || ""), found;
+    if (prepared.cache.hasOwnProperty(key)) {
+      found = prepared.cache[key];
+    } else {
+      if (!prepared.rect)
+        { prepared.rect = prepared.view.text.getBoundingClientRect(); }
+      if (!prepared.hasHeights) {
+        ensureLineHeights(cm, prepared.view, prepared.rect);
+        prepared.hasHeights = true;
+      }
+      found = measureCharInner(cm, prepared, ch, bias);
+      if (!found.bogus) { prepared.cache[key] = found; }
+    }
+    return {left: found.left, right: found.right,
+            top: varHeight ? found.rtop : found.top,
+            bottom: varHeight ? found.rbottom : found.bottom}
+  }
+
+  var nullRect = {left: 0, right: 0, top: 0, bottom: 0};
+
+  function nodeAndOffsetInLineMap(map, ch, bias) {
+    var node, start, end, collapse, mStart, mEnd;
+    // First, search the line map for the text node corresponding to,
+    // or closest to, the target character.
+    for (var i = 0; i < map.length; i += 3) {
+      mStart = map[i];
+      mEnd = map[i + 1];
+      if (ch < mStart) {
+        start = 0; end = 1;
+        collapse = "left";
+      } else if (ch < mEnd) {
+        start = ch - mStart;
+        end = start + 1;
+      } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
+        end = mEnd - mStart;
+        start = end - 1;
+        if (ch >= mEnd) { collapse = "right"; }
+      }
+      if (start != null) {
+        node = map[i + 2];
+        if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
+          { collapse = bias; }
+        if (bias == "left" && start == 0)
+          { while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
+            node = map[(i -= 3) + 2];
+            collapse = "left";
+          } }
+        if (bias == "right" && start == mEnd - mStart)
+          { while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
+            node = map[(i += 3) + 2];
+            collapse = "right";
+          } }
+        break
+      }
+    }
+    return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
+  }
+
+  function getUsefulRect(rects, bias) {
+    var rect = nullRect;
+    if (bias == "left") { for (var i = 0; i < rects.length; i++) {
+      if ((rect = rects[i]).left != rect.right) { break }
+    } } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
+      if ((rect = rects[i$1]).left != rect.right) { break }
+    } }
+    return rect
+  }
+
+  function measureCharInner(cm, prepared, ch, bias) {
+    var place = nodeAndOffsetInLineMap(prepared.map, ch, bias);
+    var node = place.node, start = place.start, end = place.end, collapse = place.collapse;
+
+    var rect;
+    if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
+      for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
+        while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start; }
+        while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end; }
+        if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
+          { rect = node.parentNode.getBoundingClientRect(); }
+        else
+          { rect = getUsefulRect(range(node, start, end).getClientRects(), bias); }
+        if (rect.left || rect.right || start == 0) { break }
+        end = start;
+        start = start - 1;
+        collapse = "right";
+      }
+      if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect); }
+    } else { // If it is a widget, simply get the box for the whole widget.
+      if (start > 0) { collapse = bias = "right"; }
+      var rects;
+      if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
+        { rect = rects[bias == "right" ? rects.length - 1 : 0]; }
+      else
+        { rect = node.getBoundingClientRect(); }
+    }
+    if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
+      var rSpan = node.parentNode.getClientRects()[0];
+      if (rSpan)
+        { rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom}; }
+      else
+        { rect = nullRect; }
+    }
+
+    var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
+    var mid = (rtop + rbot) / 2;
+    var heights = prepared.view.measure.heights;
+    var i = 0;
+    for (; i < heights.length - 1; i++)
+      { if (mid < heights[i]) { break } }
+    var top = i ? heights[i - 1] : 0, bot = heights[i];
+    var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
+                  right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
+                  top: top, bottom: bot};
+    if (!rect.left && !rect.right) { result.bogus = true; }
+    if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }
+
+    return result
+  }
+
+  // Work around problem with bounding client rects on ranges being
+  // returned incorrectly when zoomed on IE10 and below.
+  function maybeUpdateRectForZooming(measure, rect) {
+    if (!window.screen || screen.logicalXDPI == null ||
+        screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
+      { return rect }
+    var scaleX = screen.logicalXDPI / screen.deviceXDPI;
+    var scaleY = screen.logicalYDPI / screen.deviceYDPI;
+    return {left: rect.left * scaleX, right: rect.right * scaleX,
+            top: rect.top * scaleY, bottom: rect.bottom * scaleY}
+  }
+
+  function clearLineMeasurementCacheFor(lineView) {
+    if (lineView.measure) {
+      lineView.measure.cache = {};
+      lineView.measure.heights = null;
+      if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+        { lineView.measure.caches[i] = {}; } }
+    }
+  }
+
+  function clearLineMeasurementCache(cm) {
+    cm.display.externalMeasure = null;
+    removeChildren(cm.display.lineMeasure);
+    for (var i = 0; i < cm.display.view.length; i++)
+      { clearLineMeasurementCacheFor(cm.display.view[i]); }
+  }
+
+  function clearCaches(cm) {
+    clearLineMeasurementCache(cm);
+    cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
+    if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true; }
+    cm.display.lineNumChars = null;
+  }
+
+  function pageScrollX() {
+    // Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
+    // which causes page_Offset and bounding client rects to use
+    // different reference viewports and invalidate our calculations.
+    if (chrome && android) { return -(document.body.getBoundingClientRect().left - parseInt(getComputedStyle(document.body).marginLeft)) }
+    return window.pageXOffset || (document.documentElement || document.body).scrollLeft
+  }
+  function pageScrollY() {
+    if (chrome && android) { return -(document.body.getBoundingClientRect().top - parseInt(getComputedStyle(document.body).marginTop)) }
+    return window.pageYOffset || (document.documentElement || document.body).scrollTop
+  }
+
+  function widgetTopHeight(lineObj) {
+    var height = 0;
+    if (lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above)
+      { height += widgetHeight(lineObj.widgets[i]); } } }
+    return height
+  }
+
+  // Converts a {top, bottom, left, right} box from line-local
+  // coordinates into another coordinate system. Context may be one of
+  // "line", "div" (display.lineDiv), "local"./null (editor), "window",
+  // or "page".
+  function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
+    if (!includeWidgets) {
+      var height = widgetTopHeight(lineObj);
+      rect.top += height; rect.bottom += height;
+    }
+    if (context == "line") { return rect }
+    if (!context) { context = "local"; }
+    var yOff = heightAtLine(lineObj);
+    if (context == "local") { yOff += paddingTop(cm.display); }
+    else { yOff -= cm.display.viewOffset; }
+    if (context == "page" || context == "window") {
+      var lOff = cm.display.lineSpace.getBoundingClientRect();
+      yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
+      var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
+      rect.left += xOff; rect.right += xOff;
+    }
+    rect.top += yOff; rect.bottom += yOff;
+    return rect
+  }
+
+  // Coverts a box from "div" coords to another coordinate system.
+  // Context may be "window", "page", "div", or "local"./null.
+  function fromCoordSystem(cm, coords, context) {
+    if (context == "div") { return coords }
+    var left = coords.left, top = coords.top;
+    // First move into "page" coordinate system
+    if (context == "page") {
+      left -= pageScrollX();
+      top -= pageScrollY();
+    } else if (context == "local" || !context) {
+      var localBox = cm.display.sizer.getBoundingClientRect();
+      left += localBox.left;
+      top += localBox.top;
+    }
+
+    var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
+    return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
+  }
+
+  function charCoords(cm, pos, context, lineObj, bias) {
+    if (!lineObj) { lineObj = getLine(cm.doc, pos.line); }
+    return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
+  }
+
+  // Returns a box for a given cursor position, which may have an
+  // 'other' property containing the position of the secondary cursor
+  // on a bidi boundary.
+  // A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
+  // and after `char - 1` in writing order of `char - 1`
+  // A cursor Pos(line, char, "after") is on the same visual line as `char`
+  // and before `char` in writing order of `char`
+  // Examples (upper-case letters are RTL, lower-case are LTR):
+  //     Pos(0, 1, ...)
+  //     before   after
+  // ab     a|b     a|b
+  // aB     a|B     aB|
+  // Ab     |Ab     A|b
+  // AB     B|A     B|A
+  // Every position after the last character on a line is considered to stick
+  // to the last character on the line.
+  function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
+    lineObj = lineObj || getLine(cm.doc, pos.line);
+    if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
+    function get(ch, right) {
+      var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
+      if (right) { m.left = m.right; } else { m.right = m.left; }
+      return intoCoordSystem(cm, lineObj, m, context)
+    }
+    var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky;
+    if (ch >= lineObj.text.length) {
+      ch = lineObj.text.length;
+      sticky = "before";
+    } else if (ch <= 0) {
+      ch = 0;
+      sticky = "after";
+    }
+    if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }
+
+    function getBidi(ch, partPos, invert) {
+      var part = order[partPos], right = part.level == 1;
+      return get(invert ? ch - 1 : ch, right != invert)
+    }
+    var partPos = getBidiPartAt(order, ch, sticky);
+    var other = bidiOther;
+    var val = getBidi(ch, partPos, sticky == "before");
+    if (other != null) { val.other = getBidi(ch, other, sticky != "before"); }
+    return val
+  }
+
+  // Used to cheaply estimate the coordinates for a position. Used for
+  // intermediate scroll updates.
+  function estimateCoords(cm, pos) {
+    var left = 0;
+    pos = clipPos(cm.doc, pos);
+    if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch; }
+    var lineObj = getLine(cm.doc, pos.line);
+    var top = heightAtLine(lineObj) + paddingTop(cm.display);
+    return {left: left, right: left, top: top, bottom: top + lineObj.height}
+  }
+
+  // Positions returned by coordsChar contain some extra information.
+  // xRel is the relative x position of the input coordinates compared
+  // to the found position (so xRel > 0 means the coordinates are to
+  // the right of the character position, for example). When outside
+  // is true, that means the coordinates lie outside the line's
+  // vertical range.
+  function PosWithInfo(line, ch, sticky, outside, xRel) {
+    var pos = Pos(line, ch, sticky);
+    pos.xRel = xRel;
+    if (outside) { pos.outside = outside; }
+    return pos
+  }
+
+  // Compute the character position closest to the given coordinates.
+  // Input must be lineSpace-local ("div" coordinate system).
+  function coordsChar(cm, x, y) {
+    var doc = cm.doc;
+    y += cm.display.viewOffset;
+    if (y < 0) { return PosWithInfo(doc.first, 0, null, -1, -1) }
+    var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
+    if (lineN > last)
+      { return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, 1, 1) }
+    if (x < 0) { x = 0; }
+
+    var lineObj = getLine(doc, lineN);
+    for (;;) {
+      var found = coordsCharInner(cm, lineObj, lineN, x, y);
+      var collapsed = collapsedSpanAround(lineObj, found.ch + (found.xRel > 0 || found.outside > 0 ? 1 : 0));
+      if (!collapsed) { return found }
+      var rangeEnd = collapsed.find(1);
+      if (rangeEnd.line == lineN) { return rangeEnd }
+      lineObj = getLine(doc, lineN = rangeEnd.line);
+    }
+  }
+
+  function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
+    y -= widgetTopHeight(lineObj);
+    var end = lineObj.text.length;
+    var begin = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch - 1).bottom <= y; }, end, 0);
+    end = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch).top > y; }, begin, end);
+    return {begin: begin, end: end}
+  }
+
+  function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
+    if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
+    var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top;
+    return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
+  }
+
+  // Returns true if the given side of a box is after the given
+  // coordinates, in top-to-bottom, left-to-right order.
+  function boxIsAfter(box, x, y, left) {
+    return box.bottom <= y ? false : box.top > y ? true : (left ? box.left : box.right) > x
+  }
+
+  function coordsCharInner(cm, lineObj, lineNo, x, y) {
+    // Move y into line-local coordinate space
+    y -= heightAtLine(lineObj);
+    var preparedMeasure = prepareMeasureForLine(cm, lineObj);
+    // When directly calling `measureCharPrepared`, we have to adjust
+    // for the widgets at this line.
+    var widgetHeight = widgetTopHeight(lineObj);
+    var begin = 0, end = lineObj.text.length, ltr = true;
+
+    var order = getOrder(lineObj, cm.doc.direction);
+    // If the line isn't plain left-to-right text, first figure out
+    // which bidi section the coordinates fall into.
+    if (order) {
+      var part = (cm.options.lineWrapping ? coordsBidiPartWrapped : coordsBidiPart)
+                   (cm, lineObj, lineNo, preparedMeasure, order, x, y);
+      ltr = part.level != 1;
+      // The awkward -1 offsets are needed because findFirst (called
+      // on these below) will treat its first bound as inclusive,
+      // second as exclusive, but we want to actually address the
+      // characters in the part's range
+      begin = ltr ? part.from : part.to - 1;
+      end = ltr ? part.to : part.from - 1;
+    }
+
+    // A binary search to find the first character whose bounding box
+    // starts after the coordinates. If we run across any whose box wrap
+    // the coordinates, store that.
+    var chAround = null, boxAround = null;
+    var ch = findFirst(function (ch) {
+      var box = measureCharPrepared(cm, preparedMeasure, ch);
+      box.top += widgetHeight; box.bottom += widgetHeight;
+      if (!boxIsAfter(box, x, y, false)) { return false }
+      if (box.top <= y && box.left <= x) {
+        chAround = ch;
+        boxAround = box;
+      }
+      return true
+    }, begin, end);
+
+    var baseX, sticky, outside = false;
+    // If a box around the coordinates was found, use that
+    if (boxAround) {
+      // Distinguish coordinates nearer to the left or right side of the box
+      var atLeft = x - boxAround.left < boxAround.right - x, atStart = atLeft == ltr;
+      ch = chAround + (atStart ? 0 : 1);
+      sticky = atStart ? "after" : "before";
+      baseX = atLeft ? boxAround.left : boxAround.right;
+    } else {
+      // (Adjust for extended bound, if necessary.)
+      if (!ltr && (ch == end || ch == begin)) { ch++; }
+      // To determine which side to associate with, get the box to the
+      // left of the character and compare it's vertical position to the
+      // coordinates
+      sticky = ch == 0 ? "after" : ch == lineObj.text.length ? "before" :
+        (measureCharPrepared(cm, preparedMeasure, ch - (ltr ? 1 : 0)).bottom + widgetHeight <= y) == ltr ?
+        "after" : "before";
+      // Now get accurate coordinates for this place, in order to get a
+      // base X position
+      var coords = cursorCoords(cm, Pos(lineNo, ch, sticky), "line", lineObj, preparedMeasure);
+      baseX = coords.left;
+      outside = y < coords.top ? -1 : y >= coords.bottom ? 1 : 0;
+    }
+
+    ch = skipExtendingChars(lineObj.text, ch, 1);
+    return PosWithInfo(lineNo, ch, sticky, outside, x - baseX)
+  }
+
+  function coordsBidiPart(cm, lineObj, lineNo, preparedMeasure, order, x, y) {
+    // Bidi parts are sorted left-to-right, and in a non-line-wrapping
+    // situation, we can take this ordering to correspond to the visual
+    // ordering. This finds the first part whose end is after the given
+    // coordinates.
+    var index = findFirst(function (i) {
+      var part = order[i], ltr = part.level != 1;
+      return boxIsAfter(cursorCoords(cm, Pos(lineNo, ltr ? part.to : part.from, ltr ? "before" : "after"),
+                                     "line", lineObj, preparedMeasure), x, y, true)
+    }, 0, order.length - 1);
+    var part = order[index];
+    // If this isn't the first part, the part's start is also after
+    // the coordinates, and the coordinates aren't on the same line as
+    // that start, move one part back.
+    if (index > 0) {
+      var ltr = part.level != 1;
+      var start = cursorCoords(cm, Pos(lineNo, ltr ? part.from : part.to, ltr ? "after" : "before"),
+                               "line", lineObj, preparedMeasure);
+      if (boxIsAfter(start, x, y, true) && start.top > y)
+        { part = order[index - 1]; }
+    }
+    return part
+  }
+
+  function coordsBidiPartWrapped(cm, lineObj, _lineNo, preparedMeasure, order, x, y) {
+    // In a wrapped line, rtl text on wrapping boundaries can do things
+    // that don't correspond to the ordering in our `order` array at
+    // all, so a binary search doesn't work, and we want to return a
+    // part that only spans one line so that the binary search in
+    // coordsCharInner is safe. As such, we first find the extent of the
+    // wrapped line, and then do a flat search in which we discard any
+    // spans that aren't on the line.
+    var ref = wrappedLineExtent(cm, lineObj, preparedMeasure, y);
+    var begin = ref.begin;
+    var end = ref.end;
+    if (/\s/.test(lineObj.text.charAt(end - 1))) { end--; }
+    var part = null, closestDist = null;
+    for (var i = 0; i < order.length; i++) {
+      var p = order[i];
+      if (p.from >= end || p.to <= begin) { continue }
+      var ltr = p.level != 1;
+      var endX = measureCharPrepared(cm, preparedMeasure, ltr ? Math.min(end, p.to) - 1 : Math.max(begin, p.from)).right;
+      // Weigh against spans ending before this, so that they are only
+      // picked if nothing ends after
+      var dist = endX < x ? x - endX + 1e9 : endX - x;
+      if (!part || closestDist > dist) {
+        part = p;
+        closestDist = dist;
+      }
+    }
+    if (!part) { part = order[order.length - 1]; }
+    // Clip the part to the wrapped line.
+    if (part.from < begin) { part = {from: begin, to: part.to, level: part.level}; }
+    if (part.to > end) { part = {from: part.from, to: end, level: part.level}; }
+    return part
+  }
+
+  var measureText;
+  // Compute the default text height.
+  function textHeight(display) {
+    if (display.cachedTextHeight != null) { return display.cachedTextHeight }
+    if (measureText == null) {
+      measureText = elt("pre", null, "CodeMirror-line-like");
+      // Measure a bunch of lines, for browsers that compute
+      // fractional heights.
+      for (var i = 0; i < 49; ++i) {
+        measureText.appendChild(document.createTextNode("x"));
+        measureText.appendChild(elt("br"));
+      }
+      measureText.appendChild(document.createTextNode("x"));
+    }
+    removeChildrenAndAdd(display.measure, measureText);
+    var height = measureText.offsetHeight / 50;
+    if (height > 3) { display.cachedTextHeight = height; }
+    removeChildren(display.measure);
+    return height || 1
+  }
+
+  // Compute the default character width.
+  function charWidth(display) {
+    if (display.cachedCharWidth != null) { return display.cachedCharWidth }
+    var anchor = elt("span", "xxxxxxxxxx");
+    var pre = elt("pre", [anchor], "CodeMirror-line-like");
+    removeChildrenAndAdd(display.measure, pre);
+    var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
+    if (width > 2) { display.cachedCharWidth = width; }
+    return width || 10
+  }
+
+  // Do a bulk-read of the DOM positions and sizes needed to draw the
+  // view, so that we don't interleave reading and writing to the DOM.
+  function getDimensions(cm) {
+    var d = cm.display, left = {}, width = {};
+    var gutterLeft = d.gutters.clientLeft;
+    for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
+      var id = cm.display.gutterSpecs[i].className;
+      left[id] = n.offsetLeft + n.clientLeft + gutterLeft;
+      width[id] = n.clientWidth;
+    }
+    return {fixedPos: compensateForHScroll(d),
+            gutterTotalWidth: d.gutters.offsetWidth,
+            gutterLeft: left,
+            gutterWidth: width,
+            wrapperWidth: d.wrapper.clientWidth}
+  }
+
+  // Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
+  // but using getBoundingClientRect to get a sub-pixel-accurate
+  // result.
+  function compensateForHScroll(display) {
+    return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
+  }
+
+  // Returns a function that estimates the height of a line, to use as
+  // first approximation until the line becomes visible (and is thus
+  // properly measurable).
+  function estimateHeight(cm) {
+    var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
+    var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
+    return function (line) {
+      if (lineIsHidden(cm.doc, line)) { return 0 }
+
+      var widgetsHeight = 0;
+      if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
+        if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height; }
+      } }
+
+      if (wrapping)
+        { return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
+      else
+        { return widgetsHeight + th }
+    }
+  }
+
+  function estimateLineHeights(cm) {
+    var doc = cm.doc, est = estimateHeight(cm);
+    doc.iter(function (line) {
+      var estHeight = est(line);
+      if (estHeight != line.height) { updateLineHeight(line, estHeight); }
+    });
+  }
+
+  // Given a mouse event, find the corresponding position. If liberal
+  // is false, it checks whether a gutter or scrollbar was clicked,
+  // and returns null if it was. forRect is used by rectangular
+  // selections, and tries to estimate a character position even for
+  // coordinates beyond the right of the text.
+  function posFromMouse(cm, e, liberal, forRect) {
+    var display = cm.display;
+    if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }
+
+    var x, y, space = display.lineSpace.getBoundingClientRect();
+    // Fails unpredictably on IE[67] when mouse is dragged around quickly.
+    try { x = e.clientX - space.left; y = e.clientY - space.top; }
+    catch (e$1) { return null }
+    var coords = coordsChar(cm, x, y), line;
+    if (forRect && coords.xRel > 0 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
+      var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
+      coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
+    }
+    return coords
+  }
+
+  // Find the view element corresponding to a given line. Return null
+  // when the line isn't visible.
+  function findViewIndex(cm, n) {
+    if (n >= cm.display.viewTo) { return null }
+    n -= cm.display.viewFrom;
+    if (n < 0) { return null }
+    var view = cm.display.view;
+    for (var i = 0; i < view.length; i++) {
+      n -= view[i].size;
+      if (n < 0) { return i }
+    }
+  }
+
+  // Updates the display.view data structure for a given change to the
+  // document. From and to are in pre-change coordinates. Lendiff is
+  // the amount of lines added or subtracted by the change. This is
+  // used for changes that span multiple lines, or change the way
+  // lines are divided into visual lines. regLineChange (below)
+  // registers single-line changes.
+  function regChange(cm, from, to, lendiff) {
+    if (from == null) { from = cm.doc.first; }
+    if (to == null) { to = cm.doc.first + cm.doc.size; }
+    if (!lendiff) { lendiff = 0; }
+
+    var display = cm.display;
+    if (lendiff && to < display.viewTo &&
+        (display.updateLineNumbers == null || display.updateLineNumbers > from))
+      { display.updateLineNumbers = from; }
+
+    cm.curOp.viewChanged = true;
+
+    if (from >= display.viewTo) { // Change after
+      if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
+        { resetView(cm); }
+    } else if (to <= display.viewFrom) { // Change before
+      if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
+        resetView(cm);
+      } else {
+        display.viewFrom += lendiff;
+        display.viewTo += lendiff;
+      }
+    } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
+      resetView(cm);
+    } else if (from <= display.viewFrom) { // Top overlap
+      var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
+      if (cut) {
+        display.view = display.view.slice(cut.index);
+        display.viewFrom = cut.lineN;
+        display.viewTo += lendiff;
+      } else {
+        resetView(cm);
+      }
+    } else if (to >= display.viewTo) { // Bottom overlap
+      var cut$1 = viewCuttingPoint(cm, from, from, -1);
+      if (cut$1) {
+        display.view = display.view.slice(0, cut$1.index);
+        display.viewTo = cut$1.lineN;
+      } else {
+        resetView(cm);
+      }
+    } else { // Gap in the middle
+      var cutTop = viewCuttingPoint(cm, from, from, -1);
+      var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
+      if (cutTop && cutBot) {
+        display.view = display.view.slice(0, cutTop.index)
+          .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
+          .concat(display.view.slice(cutBot.index));
+        display.viewTo += lendiff;
+      } else {
+        resetView(cm);
+      }
+    }
+
+    var ext = display.externalMeasured;
+    if (ext) {
+      if (to < ext.lineN)
+        { ext.lineN += lendiff; }
+      else if (from < ext.lineN + ext.size)
+        { display.externalMeasured = null; }
+    }
+  }
+
+  // Register a change to a single line. Type must be one of "text",
+  // "gutter", "class", "widget"
+  function regLineChange(cm, line, type) {
+    cm.curOp.viewChanged = true;
+    var display = cm.display, ext = cm.display.externalMeasured;
+    if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
+      { display.externalMeasured = null; }
+
+    if (line < display.viewFrom || line >= display.viewTo) { return }
+    var lineView = display.view[findViewIndex(cm, line)];
+    if (lineView.node == null) { return }
+    var arr = lineView.changes || (lineView.changes = []);
+    if (indexOf(arr, type) == -1) { arr.push(type); }
+  }
+
+  // Clear the view.
+  function resetView(cm) {
+    cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
+    cm.display.view = [];
+    cm.display.viewOffset = 0;
+  }
+
+  function viewCuttingPoint(cm, oldN, newN, dir) {
+    var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
+    if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
+      { return {index: index, lineN: newN} }
+    var n = cm.display.viewFrom;
+    for (var i = 0; i < index; i++)
+      { n += view[i].size; }
+    if (n != oldN) {
+      if (dir > 0) {
+        if (index == view.length - 1) { return null }
+        diff = (n + view[index].size) - oldN;
+        index++;
+      } else {
+        diff = n - oldN;
+      }
+      oldN += diff; newN += diff;
+    }
+    while (visualLineNo(cm.doc, newN) != newN) {
+      if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
+      newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
+      index += dir;
+    }
+    return {index: index, lineN: newN}
+  }
+
+  // Force the view to cover a given range, adding empty view element
+  // or clipping off existing ones as needed.
+  function adjustView(cm, from, to) {
+    var display = cm.display, view = display.view;
+    if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
+      display.view = buildViewArray(cm, from, to);
+      display.viewFrom = from;
+    } else {
+      if (display.viewFrom > from)
+        { display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view); }
+      else if (display.viewFrom < from)
+        { display.view = display.view.slice(findViewIndex(cm, from)); }
+      display.viewFrom = from;
+      if (display.viewTo < to)
+        { display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)); }
+      else if (display.viewTo > to)
+        { display.view = display.view.slice(0, findViewIndex(cm, to)); }
+    }
+    display.viewTo = to;
+  }
+
+  // Count the number of lines in the view whose DOM representation is
+  // out of date (or nonexistent).
+  function countDirtyView(cm) {
+    var view = cm.display.view, dirty = 0;
+    for (var i = 0; i < view.length; i++) {
+      var lineView = view[i];
+      if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty; }
+    }
+    return dirty
+  }
+
+  function updateSelection(cm) {
+    cm.display.input.showSelection(cm.display.input.prepareSelection());
+  }
+
+  function prepareSelection(cm, primary) {
+    if ( primary === void 0 ) primary = true;
+
+    var doc = cm.doc, result = {};
+    var curFragment = result.cursors = document.createDocumentFragment();
+    var selFragment = result.selection = document.createDocumentFragment();
+
+    for (var i = 0; i < doc.sel.ranges.length; i++) {
+      if (!primary && i == doc.sel.primIndex) { continue }
+      var range = doc.sel.ranges[i];
+      if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) { continue }
+      var collapsed = range.empty();
+      if (collapsed || cm.options.showCursorWhenSelecting)
+        { drawSelectionCursor(cm, range.head, curFragment); }
+      if (!collapsed)
+        { drawSelectionRange(cm, range, selFragment); }
+    }
+    return result
+  }
+
+  // Draws a cursor for the given range
+  function drawSelectionCursor(cm, head, output) {
+    var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);
+
+    var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
+    cursor.style.left = pos.left + "px";
+    cursor.style.top = pos.top + "px";
+    cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
+
+    if (/\bcm-fat-cursor\b/.test(cm.getWrapperElement().className)) {
+      var charPos = charCoords(cm, head, "div", null, null);
+      if (charPos.right - charPos.left > 0) {
+        cursor.style.width = (charPos.right - charPos.left) + "px";
+      }
+    }
+
+    if (pos.other) {
+      // Secondary cursor, shown when on a 'jump' in bi-directional text
+      var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
+      otherCursor.style.display = "";
+      otherCursor.style.left = pos.other.left + "px";
+      otherCursor.style.top = pos.other.top + "px";
+      otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
+    }
+  }
+
+  function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }
+
+  // Draws the given range as a highlighted selection
+  function drawSelectionRange(cm, range, output) {
+    var display = cm.display, doc = cm.doc;
+    var fragment = document.createDocumentFragment();
+    var padding = paddingH(cm.display), leftSide = padding.left;
+    var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;
+    var docLTR = doc.direction == "ltr";
+
+    function add(left, top, width, bottom) {
+      if (top < 0) { top = 0; }
+      top = Math.round(top);
+      bottom = Math.round(bottom);
+      fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n                             top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n                             height: " + (bottom - top) + "px")));
+    }
+
+    function drawForLine(line, fromArg, toArg) {
+      var lineObj = getLine(doc, line);
+      var lineLen = lineObj.text.length;
+      var start, end;
+      function coords(ch, bias) {
+        return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
+      }
+
+      function wrapX(pos, dir, side) {
+        var extent = wrappedLineExtentChar(cm, lineObj, null, pos);
+        var prop = (dir == "ltr") == (side == "after") ? "left" : "right";
+        var ch = side == "after" ? extent.begin : extent.end - (/\s/.test(lineObj.text.charAt(extent.end - 1)) ? 2 : 1);
+        return coords(ch, prop)[prop]
+      }
+
+      var order = getOrder(lineObj, doc.direction);
+      iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir, i) {
+        var ltr = dir == "ltr";
+        var fromPos = coords(from, ltr ? "left" : "right");
+        var toPos = coords(to - 1, ltr ? "right" : "left");
+
+        var openStart = fromArg == null && from == 0, openEnd = toArg == null && to == lineLen;
+        var first = i == 0, last = !order || i == order.length - 1;
+        if (toPos.top - fromPos.top <= 3) { // Single line
+          var openLeft = (docLTR ? openStart : openEnd) && first;
+          var openRight = (docLTR ? openEnd : openStart) && last;
+          var left = openLeft ? leftSide : (ltr ? fromPos : toPos).left;
+          var right = openRight ? rightSide : (ltr ? toPos : fromPos).right;
+          add(left, fromPos.top, right - left, fromPos.bottom);
+        } else { // Multiple lines
+          var topLeft, topRight, botLeft, botRight;
+          if (ltr) {
+            topLeft = docLTR && openStart && first ? leftSide : fromPos.left;
+            topRight = docLTR ? rightSide : wrapX(from, dir, "before");
+            botLeft = docLTR ? leftSide : wrapX(to, dir, "after");
+            botRight = docLTR && openEnd && last ? rightSide : toPos.right;
+          } else {
+            topLeft = !docLTR ? leftSide : wrapX(from, dir, "before");
+            topRight = !docLTR && openStart && first ? rightSide : fromPos.right;
+            botLeft = !docLTR && openEnd && last ? leftSide : toPos.left;
+            botRight = !docLTR ? rightSide : wrapX(to, dir, "after");
+          }
+          add(topLeft, fromPos.top, topRight - topLeft, fromPos.bottom);
+          if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top); }
+          add(botLeft, toPos.top, botRight - botLeft, toPos.bottom);
+        }
+
+        if (!start || cmpCoords(fromPos, start) < 0) { start = fromPos; }
+        if (cmpCoords(toPos, start) < 0) { start = toPos; }
+        if (!end || cmpCoords(fromPos, end) < 0) { end = fromPos; }
+        if (cmpCoords(toPos, end) < 0) { end = toPos; }
+      });
+      return {start: start, end: end}
+    }
+
+    var sFrom = range.from(), sTo = range.to();
+    if (sFrom.line == sTo.line) {
+      drawForLine(sFrom.line, sFrom.ch, sTo.ch);
+    } else {
+      var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
+      var singleVLine = visualLine(fromLine) == visualLine(toLine);
+      var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
+      var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
+      if (singleVLine) {
+        if (leftEnd.top < rightStart.top - 2) {
+          add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
+          add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
+        } else {
+          add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
+        }
+      }
+      if (leftEnd.bottom < rightStart.top)
+        { add(leftSide, leftEnd.bottom, null, rightStart.top); }
+    }
+
+    output.appendChild(fragment);
+  }
+
+  // Cursor-blinking
+  function restartBlink(cm) {
+    if (!cm.state.focused) { return }
+    var display = cm.display;
+    clearInterval(display.blinker);
+    var on = true;
+    display.cursorDiv.style.visibility = "";
+    if (cm.options.cursorBlinkRate > 0)
+      { display.blinker = setInterval(function () {
+        if (!cm.hasFocus()) { onBlur(cm); }
+        display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden";
+      }, cm.options.cursorBlinkRate); }
+    else if (cm.options.cursorBlinkRate < 0)
+      { display.cursorDiv.style.visibility = "hidden"; }
+  }
+
+  function ensureFocus(cm) {
+    if (!cm.hasFocus()) {
+      cm.display.input.focus();
+      if (!cm.state.focused) { onFocus(cm); }
+    }
+  }
+
+  function delayBlurEvent(cm) {
+    cm.state.delayingBlurEvent = true;
+    setTimeout(function () { if (cm.state.delayingBlurEvent) {
+      cm.state.delayingBlurEvent = false;
+      if (cm.state.focused) { onBlur(cm); }
+    } }, 100);
+  }
+
+  function onFocus(cm, e) {
+    if (cm.state.delayingBlurEvent && !cm.state.draggingText) { cm.state.delayingBlurEvent = false; }
+
+    if (cm.options.readOnly == "nocursor") { return }
+    if (!cm.state.focused) {
+      signal(cm, "focus", cm, e);
+      cm.state.focused = true;
+      addClass(cm.display.wrapper, "CodeMirror-focused");
+      // This test prevents this from firing when a context
+      // menu is closed (since the input reset would kill the
+      // select-all detection hack)
+      if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
+        cm.display.input.reset();
+        if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20); } // Issue #1730
+      }
+      cm.display.input.receivedFocus();
+    }
+    restartBlink(cm);
+  }
+  function onBlur(cm, e) {
+    if (cm.state.delayingBlurEvent) { return }
+
+    if (cm.state.focused) {
+      signal(cm, "blur", cm, e);
+      cm.state.focused = false;
+      rmClass(cm.display.wrapper, "CodeMirror-focused");
+    }
+    clearInterval(cm.display.blinker);
+    setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false; } }, 150);
+  }
+
+  // Read the actual heights of the rendered lines, and update their
+  // stored heights to match.
+  function updateHeightsInViewport(cm) {
+    var display = cm.display;
+    var prevBottom = display.lineDiv.offsetTop;
+    var viewTop = Math.max(0, display.scroller.getBoundingClientRect().top);
+    var oldHeight = display.lineDiv.getBoundingClientRect().top;
+    var mustScroll = 0;
+    for (var i = 0; i < display.view.length; i++) {
+      var cur = display.view[i], wrapping = cm.options.lineWrapping;
+      var height = (void 0), width = 0;
+      if (cur.hidden) { continue }
+      oldHeight += cur.line.height;
+      if (ie && ie_version < 8) {
+        var bot = cur.node.offsetTop + cur.node.offsetHeight;
+        height = bot - prevBottom;
+        prevBottom = bot;
+      } else {
+        var box = cur.node.getBoundingClientRect();
+        height = box.bottom - box.top;
+        // Check that lines don't extend past the right of the current
+        // editor width
+        if (!wrapping && cur.text.firstChild)
+          { width = cur.text.firstChild.getBoundingClientRect().right - box.left - 1; }
+      }
+      var diff = cur.line.height - height;
+      if (diff > .005 || diff < -.005) {
+        if (oldHeight < viewTop) { mustScroll -= diff; }
+        updateLineHeight(cur.line, height);
+        updateWidgetHeight(cur.line);
+        if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
+          { updateWidgetHeight(cur.rest[j]); } }
+      }
+      if (width > cm.display.sizerWidth) {
+        var chWidth = Math.ceil(width / charWidth(cm.display));
+        if (chWidth > cm.display.maxLineLength) {
+          cm.display.maxLineLength = chWidth;
+          cm.display.maxLine = cur.line;
+          cm.display.maxLineChanged = true;
+        }
+      }
+    }
+    if (Math.abs(mustScroll) > 2) { display.scroller.scrollTop += mustScroll; }
+  }
+
+  // Read and store the height of line widgets associated with the
+  // given line.
+  function updateWidgetHeight(line) {
+    if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i) {
+      var w = line.widgets[i], parent = w.node.parentNode;
+      if (parent) { w.height = parent.offsetHeight; }
+    } }
+  }
+
+  // Compute the lines that are visible in a given viewport (defaults
+  // the the current scroll position). viewport may contain top,
+  // height, and ensure (see op.scrollToPos) properties.
+  function visibleLines(display, doc, viewport) {
+    var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
+    top = Math.floor(top - paddingTop(display));
+    var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;
+
+    var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
+    // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
+    // forces those lines into the viewport (if possible).
+    if (viewport && viewport.ensure) {
+      var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
+      if (ensureFrom < from) {
+        from = ensureFrom;
+        to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
+      } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
+        from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
+        to = ensureTo;
+      }
+    }
+    return {from: from, to: Math.max(to, from + 1)}
+  }
+
+  // SCROLLING THINGS INTO VIEW
+
+  // If an editor sits on the top or bottom of the window, partially
+  // scrolled out of view, this ensures that the cursor is visible.
+  function maybeScrollWindow(cm, rect) {
+    if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }
+
+    var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
+    if (rect.top + box.top < 0) { doScroll = true; }
+    else if (rect.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false; }
+    if (doScroll != null && !phantom) {
+      var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n                         top: " + (rect.top - display.viewOffset - paddingTop(cm.display)) + "px;\n                         height: " + (rect.bottom - rect.top + scrollGap(cm) + display.barHeight) + "px;\n                         left: " + (rect.left) + "px; width: " + (Math.max(2, rect.right - rect.left)) + "px;"));
+      cm.display.lineSpace.appendChild(scrollNode);
+      scrollNode.scrollIntoView(doScroll);
+      cm.display.lineSpace.removeChild(scrollNode);
+    }
+  }
+
+  // Scroll a given position into view (immediately), verifying that
+  // it actually became visible (as line heights are accurately
+  // measured, the position of something may 'drift' during drawing).
+  function scrollPosIntoView(cm, pos, end, margin) {
+    if (margin == null) { margin = 0; }
+    var rect;
+    if (!cm.options.lineWrapping && pos == end) {
+      // Set pos and end to the cursor positions around the character pos sticks to
+      // If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
+      // If pos == Pos(_, 0, "before"), pos and end are unchanged
+      end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos;
+      pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos;
+    }
+    for (var limit = 0; limit < 5; limit++) {
+      var changed = false;
+      var coords = cursorCoords(cm, pos);
+      var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
+      rect = {left: Math.min(coords.left, endCoords.left),
+              top: Math.min(coords.top, endCoords.top) - margin,
+              right: Math.max(coords.left, endCoords.left),
+              bottom: Math.max(coords.bottom, endCoords.bottom) + margin};
+      var scrollPos = calculateScrollPos(cm, rect);
+      var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
+      if (scrollPos.scrollTop != null) {
+        updateScrollTop(cm, scrollPos.scrollTop);
+        if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true; }
+      }
+      if (scrollPos.scrollLeft != null) {
+        setScrollLeft(cm, scrollPos.scrollLeft);
+        if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true; }
+      }
+      if (!changed) { break }
+    }
+    return rect
+  }
+
+  // Scroll a given set of coordinates into view (immediately).
+  function scrollIntoView(cm, rect) {
+    var scrollPos = calculateScrollPos(cm, rect);
+    if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop); }
+    if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft); }
+  }
+
+  // Calculate a new scroll position needed to scroll the given
+  // rectangle into view. Returns an object with scrollTop and
+  // scrollLeft properties. When these are undefined, the
+  // vertical/horizontal position does not need to be adjusted.
+  function calculateScrollPos(cm, rect) {
+    var display = cm.display, snapMargin = textHeight(cm.display);
+    if (rect.top < 0) { rect.top = 0; }
+    var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
+    var screen = displayHeight(cm), result = {};
+    if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen; }
+    var docBottom = cm.doc.height + paddingVert(display);
+    var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin;
+    if (rect.top < screentop) {
+      result.scrollTop = atTop ? 0 : rect.top;
+    } else if (rect.bottom > screentop + screen) {
+      var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen);
+      if (newTop != screentop) { result.scrollTop = newTop; }
+    }
+
+    var gutterSpace = cm.options.fixedGutter ? 0 : display.gutters.offsetWidth;
+    var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft - gutterSpace;
+    var screenw = displayWidth(cm) - display.gutters.offsetWidth;
+    var tooWide = rect.right - rect.left > screenw;
+    if (tooWide) { rect.right = rect.left + screenw; }
+    if (rect.left < 10)
+      { result.scrollLeft = 0; }
+    else if (rect.left < screenleft)
+      { result.scrollLeft = Math.max(0, rect.left + gutterSpace - (tooWide ? 0 : 10)); }
+    else if (rect.right > screenw + screenleft - 3)
+      { result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw; }
+    return result
+  }
+
+  // Store a relative adjustment to the scroll position in the current
+  // operation (to be applied when the operation finishes).
+  function addToScrollTop(cm, top) {
+    if (top == null) { return }
+    resolveScrollToPos(cm);
+    cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;
+  }
+
+  // Make sure that at the end of the operation the current cursor is
+  // shown.
+  function ensureCursorVisible(cm) {
+    resolveScrollToPos(cm);
+    var cur = cm.getCursor();
+    cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin};
+  }
+
+  function scrollToCoords(cm, x, y) {
+    if (x != null || y != null) { resolveScrollToPos(cm); }
+    if (x != null) { cm.curOp.scrollLeft = x; }
+    if (y != null) { cm.curOp.scrollTop = y; }
+  }
+
+  function scrollToRange(cm, range) {
+    resolveScrollToPos(cm);
+    cm.curOp.scrollToPos = range;
+  }
+
+  // When an operation has its scrollToPos property set, and another
+  // scroll action is applied before the end of the operation, this
+  // 'simulates' scrolling that position into view in a cheap way, so
+  // that the effect of intermediate scroll commands is not ignored.
+  function resolveScrollToPos(cm) {
+    var range = cm.curOp.scrollToPos;
+    if (range) {
+      cm.curOp.scrollToPos = null;
+      var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to);
+      scrollToCoordsRange(cm, from, to, range.margin);
+    }
+  }
+
+  function scrollToCoordsRange(cm, from, to, margin) {
+    var sPos = calculateScrollPos(cm, {
+      left: Math.min(from.left, to.left),
+      top: Math.min(from.top, to.top) - margin,
+      right: Math.max(from.right, to.right),
+      bottom: Math.max(from.bottom, to.bottom) + margin
+    });
+    scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop);
+  }
+
+  // Sync the scrollable area and scrollbars, ensure the viewport
+  // covers the visible area.
+  function updateScrollTop(cm, val) {
+    if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
+    if (!gecko) { updateDisplaySimple(cm, {top: val}); }
+    setScrollTop(cm, val, true);
+    if (gecko) { updateDisplaySimple(cm); }
+    startWorker(cm, 100);
+  }
+
+  function setScrollTop(cm, val, forceScroll) {
+    val = Math.max(0, Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val));
+    if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
+    cm.doc.scrollTop = val;
+    cm.display.scrollbars.setScrollTop(val);
+    if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val; }
+  }
+
+  // Sync scroller and scrollbar, ensure the gutter elements are
+  // aligned.
+  function setScrollLeft(cm, val, isScroller, forceScroll) {
+    val = Math.max(0, Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth));
+    if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
+    cm.doc.scrollLeft = val;
+    alignHorizontally(cm);
+    if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val; }
+    cm.display.scrollbars.setScrollLeft(val);
+  }
+
+  // SCROLLBARS
+
+  // Prepare DOM reads needed to update the scrollbars. Done in one
+  // shot to minimize update/measure roundtrips.
+  function measureForScrollbars(cm) {
+    var d = cm.display, gutterW = d.gutters.offsetWidth;
+    var docH = Math.round(cm.doc.height + paddingVert(cm.display));
+    return {
+      clientHeight: d.scroller.clientHeight,
+      viewHeight: d.wrapper.clientHeight,
+      scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
+      viewWidth: d.wrapper.clientWidth,
+      barLeft: cm.options.fixedGutter ? gutterW : 0,
+      docHeight: docH,
+      scrollHeight: docH + scrollGap(cm) + d.barHeight,
+      nativeBarWidth: d.nativeBarWidth,
+      gutterWidth: gutterW
+    }
+  }
+
+  var NativeScrollbars = function(place, scroll, cm) {
+    this.cm = cm;
+    var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
+    var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
+    vert.tabIndex = horiz.tabIndex = -1;
+    place(vert); place(horiz);
+
+    on(vert, "scroll", function () {
+      if (vert.clientHeight) { scroll(vert.scrollTop, "vertical"); }
+    });
+    on(horiz, "scroll", function () {
+      if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal"); }
+    });
+
+    this.checkedZeroWidth = false;
+    // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
+    if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px"; }
+  };
+
+  NativeScrollbars.prototype.update = function (measure) {
+    var needsH = measure.scrollWidth > measure.clientWidth + 1;
+    var needsV = measure.scrollHeight > measure.clientHeight + 1;
+    var sWidth = measure.nativeBarWidth;
+
+    if (needsV) {
+      this.vert.style.display = "block";
+      this.vert.style.bottom = needsH ? sWidth + "px" : "0";
+      var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
+      // A bug in IE8 can cause this value to be negative, so guard it.
+      this.vert.firstChild.style.height =
+        Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
+    } else {
+      this.vert.style.display = "";
+      this.vert.firstChild.style.height = "0";
+    }
+
+    if (needsH) {
+      this.horiz.style.display = "block";
+      this.horiz.style.right = needsV ? sWidth + "px" : "0";
+      this.horiz.style.left = measure.barLeft + "px";
+      var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
+      this.horiz.firstChild.style.width =
+        Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
+    } else {
+      this.horiz.style.display = "";
+      this.horiz.firstChild.style.width = "0";
+    }
+
+    if (!this.checkedZeroWidth && measure.clientHeight > 0) {
+      if (sWidth == 0) { this.zeroWidthHack(); }
+      this.checkedZeroWidth = true;
+    }
+
+    return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
+  };
+
+  NativeScrollbars.prototype.setScrollLeft = function (pos) {
+    if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos; }
+    if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz"); }
+  };
+
+  NativeScrollbars.prototype.setScrollTop = function (pos) {
+    if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos; }
+    if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert"); }
+  };
+
+  NativeScrollbars.prototype.zeroWidthHack = function () {
+    var w = mac && !mac_geMountainLion ? "12px" : "18px";
+    this.horiz.style.height = this.vert.style.width = w;
+    this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none";
+    this.disableHoriz = new Delayed;
+    this.disableVert = new Delayed;
+  };
+
+  NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
+    bar.style.pointerEvents = "auto";
+    function maybeDisable() {
+      // To find out whether the scrollbar is still visible, we
+      // check whether the element under the pixel in the bottom
+      // right corner of the scrollbar box is the scrollbar box
+      // itself (when the bar is still visible) or its filler child
+      // (when the bar is hidden). If it is still visible, we keep
+      // it enabled, if it's hidden, we disable pointer events.
+      var box = bar.getBoundingClientRect();
+      var elt = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
+          : document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1);
+      if (elt != bar) { bar.style.pointerEvents = "none"; }
+      else { delay.set(1000, maybeDisable); }
+    }
+    delay.set(1000, maybeDisable);
+  };
+
+  NativeScrollbars.prototype.clear = function () {
+    var parent = this.horiz.parentNode;
+    parent.removeChild(this.horiz);
+    parent.removeChild(this.vert);
+  };
+
+  var NullScrollbars = function () {};
+
+  NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
+  NullScrollbars.prototype.setScrollLeft = function () {};
+  NullScrollbars.prototype.setScrollTop = function () {};
+  NullScrollbars.prototype.clear = function () {};
+
+  function updateScrollbars(cm, measure) {
+    if (!measure) { measure = measureForScrollbars(cm); }
+    var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
+    updateScrollbarsInner(cm, measure);
+    for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
+      if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
+        { updateHeightsInViewport(cm); }
+      updateScrollbarsInner(cm, measureForScrollbars(cm));
+      startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
+    }
+  }
+
+  // Re-synchronize the fake scrollbars with the actual size of the
+  // content.
+  function updateScrollbarsInner(cm, measure) {
+    var d = cm.display;
+    var sizes = d.scrollbars.update(measure);
+
+    d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
+    d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";
+    d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent";
+
+    if (sizes.right && sizes.bottom) {
+      d.scrollbarFiller.style.display = "block";
+      d.scrollbarFiller.style.height = sizes.bottom + "px";
+      d.scrollbarFiller.style.width = sizes.right + "px";
+    } else { d.scrollbarFiller.style.display = ""; }
+    if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
+      d.gutterFiller.style.display = "block";
+      d.gutterFiller.style.height = sizes.bottom + "px";
+      d.gutterFiller.style.width = measure.gutterWidth + "px";
+    } else { d.gutterFiller.style.display = ""; }
+  }
+
+  var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};
+
+  function initScrollbars(cm) {
+    if (cm.display.scrollbars) {
+      cm.display.scrollbars.clear();
+      if (cm.display.scrollbars.addClass)
+        { rmClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
+    }
+
+    cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
+      cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
+      // Prevent clicks in the scrollbars from killing focus
+      on(node, "mousedown", function () {
+        if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0); }
+      });
+      node.setAttribute("cm-not-content", "true");
+    }, function (pos, axis) {
+      if (axis == "horizontal") { setScrollLeft(cm, pos); }
+      else { updateScrollTop(cm, pos); }
+    }, cm);
+    if (cm.display.scrollbars.addClass)
+      { addClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
+  }
+
+  // Operations are used to wrap a series of changes to the editor
+  // state in such a way that each change won't have to update the
+  // cursor and display (which would be awkward, slow, and
+  // error-prone). Instead, display updates are batched and then all
+  // combined and executed at once.
+
+  var nextOpId = 0;
+  // Start a new operation.
+  function startOperation(cm) {
+    cm.curOp = {
+      cm: cm,
+      viewChanged: false,      // Flag that indicates that lines might need to be redrawn
+      startHeight: cm.doc.height, // Used to detect need to update scrollbar
+      forceUpdate: false,      // Used to force a redraw
+      updateInput: 0,       // Whether to reset the input textarea
+      typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
+      changeObjs: null,        // Accumulated changes, for firing change events
+      cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
+      cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
+      selectionChanged: false, // Whether the selection needs to be redrawn
+      updateMaxLine: false,    // Set when the widest line needs to be determined anew
+      scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
+      scrollToPos: null,       // Used to scroll to a specific position
+      focus: false,
+      id: ++nextOpId,          // Unique ID
+      markArrays: null         // Used by addMarkedSpan
+    };
+    pushOperation(cm.curOp);
+  }
+
+  // Finish an operation, updating the display and signalling delayed events
+  function endOperation(cm) {
+    var op = cm.curOp;
+    if (op) { finishOperation(op, function (group) {
+      for (var i = 0; i < group.ops.length; i++)
+        { group.ops[i].cm.curOp = null; }
+      endOperations(group);
+    }); }
+  }
+
+  // The DOM updates done when an operation finishes are batched so
+  // that the minimum number of relayouts are required.
+  function endOperations(group) {
+    var ops = group.ops;
+    for (var i = 0; i < ops.length; i++) // Read DOM
+      { endOperation_R1(ops[i]); }
+    for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
+      { endOperation_W1(ops[i$1]); }
+    for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
+      { endOperation_R2(ops[i$2]); }
+    for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
+      { endOperation_W2(ops[i$3]); }
+    for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
+      { endOperation_finish(ops[i$4]); }
+  }
+
+  function endOperation_R1(op) {
+    var cm = op.cm, display = cm.display;
+    maybeClipScrollbars(cm);
+    if (op.updateMaxLine) { findMaxLine(cm); }
+
+    op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
+      op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
+                         op.scrollToPos.to.line >= display.viewTo) ||
+      display.maxLineChanged && cm.options.lineWrapping;
+    op.update = op.mustUpdate &&
+      new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
+  }
+
+  function endOperation_W1(op) {
+    op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);
+  }
+
+  function endOperation_R2(op) {
+    var cm = op.cm, display = cm.display;
+    if (op.updatedDisplay) { updateHeightsInViewport(cm); }
+
+    op.barMeasure = measureForScrollbars(cm);
+
+    // If the max line changed since it was last measured, measure it,
+    // and ensure the document's width matches it.
+    // updateDisplay_W2 will use these properties to do the actual resizing
+    if (display.maxLineChanged && !cm.options.lineWrapping) {
+      op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
+      cm.display.sizerWidth = op.adjustWidthTo;
+      op.barMeasure.scrollWidth =
+        Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
+      op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));
+    }
+
+    if (op.updatedDisplay || op.selectionChanged)
+      { op.preparedSelection = display.input.prepareSelection(); }
+  }
+
+  function endOperation_W2(op) {
+    var cm = op.cm;
+
+    if (op.adjustWidthTo != null) {
+      cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
+      if (op.maxScrollLeft < cm.doc.scrollLeft)
+        { setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true); }
+      cm.display.maxLineChanged = false;
+    }
+
+    var takeFocus = op.focus && op.focus == activeElt();
+    if (op.preparedSelection)
+      { cm.display.input.showSelection(op.preparedSelection, takeFocus); }
+    if (op.updatedDisplay || op.startHeight != cm.doc.height)
+      { updateScrollbars(cm, op.barMeasure); }
+    if (op.updatedDisplay)
+      { setDocumentHeight(cm, op.barMeasure); }
+
+    if (op.selectionChanged) { restartBlink(cm); }
+
+    if (cm.state.focused && op.updateInput)
+      { cm.display.input.reset(op.typing); }
+    if (takeFocus) { ensureFocus(op.cm); }
+  }
+
+  function endOperation_finish(op) {
+    var cm = op.cm, display = cm.display, doc = cm.doc;
+
+    if (op.updatedDisplay) { postUpdateDisplay(cm, op.update); }
+
+    // Abort mouse wheel delta measurement, when scrolling explicitly
+    if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
+      { display.wheelStartX = display.wheelStartY = null; }
+
+    // Propagate the scroll position to the actual DOM scroller
+    if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll); }
+
+    if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true); }
+    // If we need to scroll a specific position into view, do so.
+    if (op.scrollToPos) {
+      var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
+                                   clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
+      maybeScrollWindow(cm, rect);
+    }
+
+    // Fire events for markers that are hidden/unidden by editing or
+    // undoing
+    var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
+    if (hidden) { for (var i = 0; i < hidden.length; ++i)
+      { if (!hidden[i].lines.length) { signal(hidden[i], "hide"); } } }
+    if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
+      { if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide"); } } }
+
+    if (display.wrapper.offsetHeight)
+      { doc.scrollTop = cm.display.scroller.scrollTop; }
+
+    // Fire change events, and delayed event handlers
+    if (op.changeObjs)
+      { signal(cm, "changes", cm, op.changeObjs); }
+    if (op.update)
+      { op.update.finish(); }
+  }
+
+  // Run the given function in an operation
+  function runInOp(cm, f) {
+    if (cm.curOp) { return f() }
+    startOperation(cm);
+    try { return f() }
+    finally { endOperation(cm); }
+  }
+  // Wraps a function in an operation. Returns the wrapped function.
+  function operation(cm, f) {
+    return function() {
+      if (cm.curOp) { return f.apply(cm, arguments) }
+      startOperation(cm);
+      try { return f.apply(cm, arguments) }
+      finally { endOperation(cm); }
+    }
+  }
+  // Used to add methods to editor and doc instances, wrapping them in
+  // operations.
+  function methodOp(f) {
+    return function() {
+      if (this.curOp) { return f.apply(this, arguments) }
+      startOperation(this);
+      try { return f.apply(this, arguments) }
+      finally { endOperation(this); }
+    }
+  }
+  function docMethodOp(f) {
+    return function() {
+      var cm = this.cm;
+      if (!cm || cm.curOp) { return f.apply(this, arguments) }
+      startOperation(cm);
+      try { return f.apply(this, arguments) }
+      finally { endOperation(cm); }
+    }
+  }
+
+  // HIGHLIGHT WORKER
+
+  function startWorker(cm, time) {
+    if (cm.doc.highlightFrontier < cm.display.viewTo)
+      { cm.state.highlight.set(time, bind(highlightWorker, cm)); }
+  }
+
+  function highlightWorker(cm) {
+    var doc = cm.doc;
+    if (doc.highlightFrontier >= cm.display.viewTo) { return }
+    var end = +new Date + cm.options.workTime;
+    var context = getContextBefore(cm, doc.highlightFrontier);
+    var changedLines = [];
+
+    doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
+      if (context.line >= cm.display.viewFrom) { // Visible
+        var oldStyles = line.styles;
+        var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null;
+        var highlighted = highlightLine(cm, line, context, true);
+        if (resetState) { context.state = resetState; }
+        line.styles = highlighted.styles;
+        var oldCls = line.styleClasses, newCls = highlighted.classes;
+        if (newCls) { line.styleClasses = newCls; }
+        else if (oldCls) { line.styleClasses = null; }
+        var ischange = !oldStyles || oldStyles.length != line.styles.length ||
+          oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
+        for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i]; }
+        if (ischange) { changedLines.push(context.line); }
+        line.stateAfter = context.save();
+        context.nextLine();
+      } else {
+        if (line.text.length <= cm.options.maxHighlightLength)
+          { processLine(cm, line.text, context); }
+        line.stateAfter = context.line % 5 == 0 ? context.save() : null;
+        context.nextLine();
+      }
+      if (+new Date > end) {
+        startWorker(cm, cm.options.workDelay);
+        return true
+      }
+    });
+    doc.highlightFrontier = context.line;
+    doc.modeFrontier = Math.max(doc.modeFrontier, context.line);
+    if (changedLines.length) { runInOp(cm, function () {
+      for (var i = 0; i < changedLines.length; i++)
+        { regLineChange(cm, changedLines[i], "text"); }
+    }); }
+  }
+
+  // DISPLAY DRAWING
+
+  var DisplayUpdate = function(cm, viewport, force) {
+    var display = cm.display;
+
+    this.viewport = viewport;
+    // Store some values that we'll need later (but don't want to force a relayout for)
+    this.visible = visibleLines(display, cm.doc, viewport);
+    this.editorIsHidden = !display.wrapper.offsetWidth;
+    this.wrapperHeight = display.wrapper.clientHeight;
+    this.wrapperWidth = display.wrapper.clientWidth;
+    this.oldDisplayWidth = displayWidth(cm);
+    this.force = force;
+    this.dims = getDimensions(cm);
+    this.events = [];
+  };
+
+  DisplayUpdate.prototype.signal = function (emitter, type) {
+    if (hasHandler(emitter, type))
+      { this.events.push(arguments); }
+  };
+  DisplayUpdate.prototype.finish = function () {
+    for (var i = 0; i < this.events.length; i++)
+      { signal.apply(null, this.events[i]); }
+  };
+
+  function maybeClipScrollbars(cm) {
+    var display = cm.display;
+    if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
+      display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
+      display.heightForcer.style.height = scrollGap(cm) + "px";
+      display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
+      display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
+      display.scrollbarsClipped = true;
+    }
+  }
+
+  function selectionSnapshot(cm) {
+    if (cm.hasFocus()) { return null }
+    var active = activeElt();
+    if (!active || !contains(cm.display.lineDiv, active)) { return null }
+    var result = {activeElt: active};
+    if (window.getSelection) {
+      var sel = window.getSelection();
+      if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
+        result.anchorNode = sel.anchorNode;
+        result.anchorOffset = sel.anchorOffset;
+        result.focusNode = sel.focusNode;
+        result.focusOffset = sel.focusOffset;
+      }
+    }
+    return result
+  }
+
+  function restoreSelection(snapshot) {
+    if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt()) { return }
+    snapshot.activeElt.focus();
+    if (!/^(INPUT|TEXTAREA)$/.test(snapshot.activeElt.nodeName) &&
+        snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
+      var sel = window.getSelection(), range = document.createRange();
+      range.setEnd(snapshot.anchorNode, snapshot.anchorOffset);
+      range.collapse(false);
+      sel.removeAllRanges();
+      sel.addRange(range);
+      sel.extend(snapshot.focusNode, snapshot.focusOffset);
+    }
+  }
+
+  // Does the actual updating of the line display. Bails out
+  // (returning false) when there is nothing to be done and forced is
+  // false.
+  function updateDisplayIfNeeded(cm, update) {
+    var display = cm.display, doc = cm.doc;
+
+    if (update.editorIsHidden) {
+      resetView(cm);
+      return false
+    }
+
+    // Bail out if the visible area is already rendered and nothing changed.
+    if (!update.force &&
+        update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
+        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
+        display.renderedView == display.view && countDirtyView(cm) == 0)
+      { return false }
+
+    if (maybeUpdateLineNumberWidth(cm)) {
+      resetView(cm);
+      update.dims = getDimensions(cm);
+    }
+
+    // Compute a suitable new viewport (from & to)
+    var end = doc.first + doc.size;
+    var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
+    var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
+    if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom); }
+    if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo); }
+    if (sawCollapsedSpans) {
+      from = visualLineNo(cm.doc, from);
+      to = visualLineEndNo(cm.doc, to);
+    }
+
+    var different = from != display.viewFrom || to != display.viewTo ||
+      display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
+    adjustView(cm, from, to);
+
+    display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
+    // Position the mover div to align with the current scroll position
+    cm.display.mover.style.top = display.viewOffset + "px";
+
+    var toUpdate = countDirtyView(cm);
+    if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
+        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
+      { return false }
+
+    // For big changes, we hide the enclosing element during the
+    // update, since that speeds up the operations on most browsers.
+    var selSnapshot = selectionSnapshot(cm);
+    if (toUpdate > 4) { display.lineDiv.style.display = "none"; }
+    patchDisplay(cm, display.updateLineNumbers, update.dims);
+    if (toUpdate > 4) { display.lineDiv.style.display = ""; }
+    display.renderedView = display.view;
+    // There might have been a widget with a focused element that got
+    // hidden or updated, if so re-focus it.
+    restoreSelection(selSnapshot);
+
+    // Prevent selection and cursors from interfering with the scroll
+    // width and height.
+    removeChildren(display.cursorDiv);
+    removeChildren(display.selectionDiv);
+    display.gutters.style.height = display.sizer.style.minHeight = 0;
+
+    if (different) {
+      display.lastWrapHeight = update.wrapperHeight;
+      display.lastWrapWidth = update.wrapperWidth;
+      startWorker(cm, 400);
+    }
+
+    display.updateLineNumbers = null;
+
+    return true
+  }
+
+  function postUpdateDisplay(cm, update) {
+    var viewport = update.viewport;
+
+    for (var first = true;; first = false) {
+      if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
+        // Clip forced viewport to actual scrollable area.
+        if (viewport && viewport.top != null)
+          { viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)}; }
+        // Updated line heights might result in the drawn area not
+        // actually covering the viewport. Keep looping until it does.
+        update.visible = visibleLines(cm.display, cm.doc, viewport);
+        if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
+          { break }
+      } else if (first) {
+        update.visible = visibleLines(cm.display, cm.doc, viewport);
+      }
+      if (!updateDisplayIfNeeded(cm, update)) { break }
+      updateHeightsInViewport(cm);
+      var barMeasure = measureForScrollbars(cm);
+      updateSelection(cm);
+      updateScrollbars(cm, barMeasure);
+      setDocumentHeight(cm, barMeasure);
+      update.force = false;
+    }
+
+    update.signal(cm, "update", cm);
+    if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
+      update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
+      cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;
+    }
+  }
+
+  function updateDisplaySimple(cm, viewport) {
+    var update = new DisplayUpdate(cm, viewport);
+    if (updateDisplayIfNeeded(cm, update)) {
+      updateHeightsInViewport(cm);
+      postUpdateDisplay(cm, update);
+      var barMeasure = measureForScrollbars(cm);
+      updateSelection(cm);
+      updateScrollbars(cm, barMeasure);
+      setDocumentHeight(cm, barMeasure);
+      update.finish();
+    }
+  }
+
+  // Sync the actual display DOM structure with display.view, removing
+  // nodes for lines that are no longer in view, and creating the ones
+  // that are not there yet, and updating the ones that are out of
+  // date.
+  function patchDisplay(cm, updateNumbersFrom, dims) {
+    var display = cm.display, lineNumbers = cm.options.lineNumbers;
+    var container = display.lineDiv, cur = container.firstChild;
+
+    function rm(node) {
+      var next = node.nextSibling;
+      // Works around a throw-scroll bug in OS X Webkit
+      if (webkit && mac && cm.display.currentWheelTarget == node)
+        { node.style.display = "none"; }
+      else
+        { node.parentNode.removeChild(node); }
+      return next
+    }
+
+    var view = display.view, lineN = display.viewFrom;
+    // Loop over the elements in the view, syncing cur (the DOM nodes
+    // in display.lineDiv) with the view as we go.
+    for (var i = 0; i < view.length; i++) {
+      var lineView = view[i];
+      if (lineView.hidden) ; else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
+        var node = buildLineElement(cm, lineView, lineN, dims);
+        container.insertBefore(node, cur);
+      } else { // Already drawn
+        while (cur != lineView.node) { cur = rm(cur); }
+        var updateNumber = lineNumbers && updateNumbersFrom != null &&
+          updateNumbersFrom <= lineN && lineView.lineNumber;
+        if (lineView.changes) {
+          if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false; }
+          updateLineForChanges(cm, lineView, lineN, dims);
+        }
+        if (updateNumber) {
+          removeChildren(lineView.lineNumber);
+          lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
+        }
+        cur = lineView.node.nextSibling;
+      }
+      lineN += lineView.size;
+    }
+    while (cur) { cur = rm(cur); }
+  }
+
+  function updateGutterSpace(display) {
+    var width = display.gutters.offsetWidth;
+    display.sizer.style.marginLeft = width + "px";
+    // Send an event to consumers responding to changes in gutter width.
+    signalLater(display, "gutterChanged", display);
+  }
+
+  function setDocumentHeight(cm, measure) {
+    cm.display.sizer.style.minHeight = measure.docHeight + "px";
+    cm.display.heightForcer.style.top = measure.docHeight + "px";
+    cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px";
+  }
+
+  // Re-align line numbers and gutter marks to compensate for
+  // horizontal scrolling.
+  function alignHorizontally(cm) {
+    var display = cm.display, view = display.view;
+    if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
+    var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
+    var gutterW = display.gutters.offsetWidth, left = comp + "px";
+    for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
+      if (cm.options.fixedGutter) {
+        if (view[i].gutter)
+          { view[i].gutter.style.left = left; }
+        if (view[i].gutterBackground)
+          { view[i].gutterBackground.style.left = left; }
+      }
+      var align = view[i].alignable;
+      if (align) { for (var j = 0; j < align.length; j++)
+        { align[j].style.left = left; } }
+    } }
+    if (cm.options.fixedGutter)
+      { display.gutters.style.left = (comp + gutterW) + "px"; }
+  }
+
+  // Used to ensure that the line number gutter is still the right
+  // size for the current document size. Returns true when an update
+  // is needed.
+  function maybeUpdateLineNumberWidth(cm) {
+    if (!cm.options.lineNumbers) { return false }
+    var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
+    if (last.length != display.lineNumChars) {
+      var test = display.measure.appendChild(elt("div", [elt("div", last)],
+                                                 "CodeMirror-linenumber CodeMirror-gutter-elt"));
+      var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
+      display.lineGutter.style.width = "";
+      display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1;
+      display.lineNumWidth = display.lineNumInnerWidth + padding;
+      display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
+      display.lineGutter.style.width = display.lineNumWidth + "px";
+      updateGutterSpace(cm.display);
+      return true
+    }
+    return false
+  }
+
+  function getGutters(gutters, lineNumbers) {
+    var result = [], sawLineNumbers = false;
+    for (var i = 0; i < gutters.length; i++) {
+      var name = gutters[i], style = null;
+      if (typeof name != "string") { style = name.style; name = name.className; }
+      if (name == "CodeMirror-linenumbers") {
+        if (!lineNumbers) { continue }
+        else { sawLineNumbers = true; }
+      }
+      result.push({className: name, style: style});
+    }
+    if (lineNumbers && !sawLineNumbers) { result.push({className: "CodeMirror-linenumbers", style: null}); }
+    return result
+  }
+
+  // Rebuild the gutter elements, ensure the margin to the left of the
+  // code matches their width.
+  function renderGutters(display) {
+    var gutters = display.gutters, specs = display.gutterSpecs;
+    removeChildren(gutters);
+    display.lineGutter = null;
+    for (var i = 0; i < specs.length; ++i) {
+      var ref = specs[i];
+      var className = ref.className;
+      var style = ref.style;
+      var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + className));
+      if (style) { gElt.style.cssText = style; }
+      if (className == "CodeMirror-linenumbers") {
+        display.lineGutter = gElt;
+        gElt.style.width = (display.lineNumWidth || 1) + "px";
+      }
+    }
+    gutters.style.display = specs.length ? "" : "none";
+    updateGutterSpace(display);
+  }
+
+  function updateGutters(cm) {
+    renderGutters(cm.display);
+    regChange(cm);
+    alignHorizontally(cm);
+  }
+
+  // The display handles the DOM integration, both for input reading
+  // and content drawing. It holds references to DOM nodes and
+  // display-related state.
+
+  function Display(place, doc, input, options) {
+    var d = this;
+    this.input = input;
+
+    // Covers bottom-right square when both scrollbars are present.
+    d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
+    d.scrollbarFiller.setAttribute("cm-not-content", "true");
+    // Covers bottom of gutter when coverGutterNextToScrollbar is on
+    // and h scrollbar is present.
+    d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
+    d.gutterFiller.setAttribute("cm-not-content", "true");
+    // Will contain the actual code, positioned to cover the viewport.
+    d.lineDiv = eltP("div", null, "CodeMirror-code");
+    // Elements are added to these to represent selection and cursors.
+    d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
+    d.cursorDiv = elt("div", null, "CodeMirror-cursors");
+    // A visibility: hidden element used to find the size of things.
+    d.measure = elt("div", null, "CodeMirror-measure");
+    // When lines outside of the viewport are measured, they are drawn in this.
+    d.lineMeasure = elt("div", null, "CodeMirror-measure");
+    // Wraps everything that needs to exist inside the vertically-padded coordinate system
+    d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
+                      null, "position: relative; outline: none");
+    var lines = eltP("div", [d.lineSpace], "CodeMirror-lines");
+    // Moved around its parent to cover visible view.
+    d.mover = elt("div", [lines], null, "position: relative");
+    // Set to the height of the document, allowing scrolling.
+    d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
+    d.sizerWidth = null;
+    // Behavior of elts with overflow: auto and padding is
+    // inconsistent across browsers. This is used to ensure the
+    // scrollable area is big enough.
+    d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
+    // Will contain the gutters, if any.
+    d.gutters = elt("div", null, "CodeMirror-gutters");
+    d.lineGutter = null;
+    // Actual scrollable element.
+    d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
+    d.scroller.setAttribute("tabIndex", "-1");
+    // The element in which the editor lives.
+    d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
+
+    // This attribute is respected by automatic translation systems such as Google Translate,
+    // and may also be respected by tools used by human translators.
+    d.wrapper.setAttribute('translate', 'no');
+
+    // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
+    if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
+    if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true; }
+
+    if (place) {
+      if (place.appendChild) { place.appendChild(d.wrapper); }
+      else { place(d.wrapper); }
+    }
+
+    // Current rendered range (may be bigger than the view window).
+    d.viewFrom = d.viewTo = doc.first;
+    d.reportedViewFrom = d.reportedViewTo = doc.first;
+    // Information about the rendered lines.
+    d.view = [];
+    d.renderedView = null;
+    // Holds info about a single rendered line when it was rendered
+    // for measurement, while not in view.
+    d.externalMeasured = null;
+    // Empty space (in pixels) above the view
+    d.viewOffset = 0;
+    d.lastWrapHeight = d.lastWrapWidth = 0;
+    d.updateLineNumbers = null;
+
+    d.nativeBarWidth = d.barHeight = d.barWidth = 0;
+    d.scrollbarsClipped = false;
+
+    // Used to only resize the line number gutter when necessary (when
+    // the amount of lines crosses a boundary that makes its width change)
+    d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
+    // Set to true when a non-horizontal-scrolling line widget is
+    // added. As an optimization, line widget aligning is skipped when
+    // this is false.
+    d.alignWidgets = false;
+
+    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
+
+    // Tracks the maximum line length so that the horizontal scrollbar
+    // can be kept static when scrolling.
+    d.maxLine = null;
+    d.maxLineLength = 0;
+    d.maxLineChanged = false;
+
+    // Used for measuring wheel scrolling granularity
+    d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
+
+    // True when shift is held down.
+    d.shift = false;
+
+    // Used to track whether anything happened since the context menu
+    // was opened.
+    d.selForContextMenu = null;
+
+    d.activeTouch = null;
+
+    d.gutterSpecs = getGutters(options.gutters, options.lineNumbers);
+    renderGutters(d);
+
+    input.init(d);
+  }
+
+  // Since the delta values reported on mouse wheel events are
+  // unstandardized between browsers and even browser versions, and
+  // generally horribly unpredictable, this code starts by measuring
+  // the scroll effect that the first few mouse wheel events have,
+  // and, from that, detects the way it can convert deltas to pixel
+  // offsets afterwards.
+  //
+  // The reason we want to know the amount a wheel event will scroll
+  // is that it gives us a chance to update the display before the
+  // actual scrolling happens, reducing flickering.
+
+  var wheelSamples = 0, wheelPixelsPerUnit = null;
+  // Fill in a browser-detected starting value on browsers where we
+  // know one. These don't have to be accurate -- the result of them
+  // being wrong would just be a slight flicker on the first wheel
+  // scroll (if it is large enough).
+  if (ie) { wheelPixelsPerUnit = -.53; }
+  else if (gecko) { wheelPixelsPerUnit = 15; }
+  else if (chrome) { wheelPixelsPerUnit = -.7; }
+  else if (safari) { wheelPixelsPerUnit = -1/3; }
+
+  function wheelEventDelta(e) {
+    var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
+    if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail; }
+    if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail; }
+    else if (dy == null) { dy = e.wheelDelta; }
+    return {x: dx, y: dy}
+  }
+  function wheelEventPixels(e) {
+    var delta = wheelEventDelta(e);
+    delta.x *= wheelPixelsPerUnit;
+    delta.y *= wheelPixelsPerUnit;
+    return delta
+  }
+
+  function onScrollWheel(cm, e) {
+    var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;
+
+    var display = cm.display, scroll = display.scroller;
+    // Quit if there's nothing to scroll here
+    var canScrollX = scroll.scrollWidth > scroll.clientWidth;
+    var canScrollY = scroll.scrollHeight > scroll.clientHeight;
+    if (!(dx && canScrollX || dy && canScrollY)) { return }
+
+    // Webkit browsers on OS X abort momentum scrolls when the target
+    // of the scroll event is removed from the scrollable element.
+    // This hack (see related code in patchDisplay) makes sure the
+    // element is kept around.
+    if (dy && mac && webkit) {
+      outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
+        for (var i = 0; i < view.length; i++) {
+          if (view[i].node == cur) {
+            cm.display.currentWheelTarget = cur;
+            break outer
+          }
+        }
+      }
+    }
+
+    // On some browsers, horizontal scrolling will cause redraws to
+    // happen before the gutter has been realigned, causing it to
+    // wriggle around in a most unseemly way. When we have an
+    // estimated pixels/delta value, we just handle horizontal
+    // scrolling entirely here. It'll be slightly off from native, but
+    // better than glitching out.
+    if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
+      if (dy && canScrollY)
+        { updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * wheelPixelsPerUnit)); }
+      setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * wheelPixelsPerUnit));
+      // Only prevent default scrolling if vertical scrolling is
+      // actually possible. Otherwise, it causes vertical scroll
+      // jitter on OSX trackpads when deltaX is small and deltaY
+      // is large (issue #3579)
+      if (!dy || (dy && canScrollY))
+        { e_preventDefault(e); }
+      display.wheelStartX = null; // Abort measurement, if in progress
+      return
+    }
+
+    // 'Project' the visible viewport to cover the area that is being
+    // scrolled into view (if we know enough to estimate it).
+    if (dy && wheelPixelsPerUnit != null) {
+      var pixels = dy * wheelPixelsPerUnit;
+      var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
+      if (pixels < 0) { top = Math.max(0, top + pixels - 50); }
+      else { bot = Math.min(cm.doc.height, bot + pixels + 50); }
+      updateDisplaySimple(cm, {top: top, bottom: bot});
+    }
+
+    if (wheelSamples < 20) {
+      if (display.wheelStartX == null) {
+        display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
+        display.wheelDX = dx; display.wheelDY = dy;
+        setTimeout(function () {
+          if (display.wheelStartX == null) { return }
+          var movedX = scroll.scrollLeft - display.wheelStartX;
+          var movedY = scroll.scrollTop - display.wheelStartY;
+          var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
+            (movedX && display.wheelDX && movedX / display.wheelDX);
+          display.wheelStartX = display.wheelStartY = null;
+          if (!sample) { return }
+          wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
+          ++wheelSamples;
+        }, 200);
+      } else {
+        display.wheelDX += dx; display.wheelDY += dy;
+      }
+    }
+  }
+
+  // Selection objects are immutable. A new one is created every time
+  // the selection changes. A selection is one or more non-overlapping
+  // (and non-touching) ranges, sorted, and an integer that indicates
+  // which one is the primary selection (the one that's scrolled into
+  // view, that getCursor returns, etc).
+  var Selection = function(ranges, primIndex) {
+    this.ranges = ranges;
+    this.primIndex = primIndex;
+  };
+
+  Selection.prototype.primary = function () { return this.ranges[this.primIndex] };
+
+  Selection.prototype.equals = function (other) {
+    if (other == this) { return true }
+    if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
+    for (var i = 0; i < this.ranges.length; i++) {
+      var here = this.ranges[i], there = other.ranges[i];
+      if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }
+    }
+    return true
+  };
+
+  Selection.prototype.deepCopy = function () {
+    var out = [];
+    for (var i = 0; i < this.ranges.length; i++)
+      { out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i].head)); }
+    return new Selection(out, this.primIndex)
+  };
+
+  Selection.prototype.somethingSelected = function () {
+    for (var i = 0; i < this.ranges.length; i++)
+      { if (!this.ranges[i].empty()) { return true } }
+    return false
+  };
+
+  Selection.prototype.contains = function (pos, end) {
+    if (!end) { end = pos; }
+    for (var i = 0; i < this.ranges.length; i++) {
+      var range = this.ranges[i];
+      if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
+        { return i }
+    }
+    return -1
+  };
+
+  var Range = function(anchor, head) {
+    this.anchor = anchor; this.head = head;
+  };
+
+  Range.prototype.from = function () { return minPos(this.anchor, this.head) };
+  Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
+  Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };
+
+  // Take an unsorted, potentially overlapping set of ranges, and
+  // build a selection out of it. 'Consumes' ranges array (modifying
+  // it).
+  function normalizeSelection(cm, ranges, primIndex) {
+    var mayTouch = cm && cm.options.selectionsMayTouch;
+    var prim = ranges[primIndex];
+    ranges.sort(function (a, b) { return cmp(a.from(), b.from()); });
+    primIndex = indexOf(ranges, prim);
+    for (var i = 1; i < ranges.length; i++) {
+      var cur = ranges[i], prev = ranges[i - 1];
+      var diff = cmp(prev.to(), cur.from());
+      if (mayTouch && !cur.empty() ? diff > 0 : diff >= 0) {
+        var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
+        var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
+        if (i <= primIndex) { --primIndex; }
+        ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
+      }
+    }
+    return new Selection(ranges, primIndex)
+  }
+
+  function simpleSelection(anchor, head) {
+    return new Selection([new Range(anchor, head || anchor)], 0)
+  }
+
+  // Compute the position of the end of a change (its 'to' property
+  // refers to the pre-change end).
+  function changeEnd(change) {
+    if (!change.text) { return change.to }
+    return Pos(change.from.line + change.text.length - 1,
+               lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
+  }
+
+  // Adjust a position to refer to the post-change position of the
+  // same text, or the end of the change if the change covers it.
+  function adjustForChange(pos, change) {
+    if (cmp(pos, change.from) < 0) { return pos }
+    if (cmp(pos, change.to) <= 0) { return changeEnd(change) }
+
+    var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
+    if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch; }
+    return Pos(line, ch)
+  }
+
+  function computeSelAfterChange(doc, change) {
+    var out = [];
+    for (var i = 0; i < doc.sel.ranges.length; i++) {
+      var range = doc.sel.ranges[i];
+      out.push(new Range(adjustForChange(range.anchor, change),
+                         adjustForChange(range.head, change)));
+    }
+    return normalizeSelection(doc.cm, out, doc.sel.primIndex)
+  }
+
+  function offsetPos(pos, old, nw) {
+    if (pos.line == old.line)
+      { return Pos(nw.line, pos.ch - old.ch + nw.ch) }
+    else
+      { return Pos(nw.line + (pos.line - old.line), pos.ch) }
+  }
+
+  // Used by replaceSelections to allow moving the selection to the
+  // start or around the replaced test. Hint may be "start" or "around".
+  function computeReplacedSel(doc, changes, hint) {
+    var out = [];
+    var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
+    for (var i = 0; i < changes.length; i++) {
+      var change = changes[i];
+      var from = offsetPos(change.from, oldPrev, newPrev);
+      var to = offsetPos(changeEnd(change), oldPrev, newPrev);
+      oldPrev = change.to;
+      newPrev = to;
+      if (hint == "around") {
+        var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
+        out[i] = new Range(inv ? to : from, inv ? from : to);
+      } else {
+        out[i] = new Range(from, from);
+      }
+    }
+    return new Selection(out, doc.sel.primIndex)
+  }
+
+  // Used to get the editor into a consistent state again when options change.
+
+  function loadMode(cm) {
+    cm.doc.mode = getMode(cm.options, cm.doc.modeOption);
+    resetModeState(cm);
+  }
+
+  function resetModeState(cm) {
+    cm.doc.iter(function (line) {
+      if (line.stateAfter) { line.stateAfter = null; }
+      if (line.styles) { line.styles = null; }
+    });
+    cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first;
+    startWorker(cm, 100);
+    cm.state.modeGen++;
+    if (cm.curOp) { regChange(cm); }
+  }
+
+  // DOCUMENT DATA STRUCTURE
+
+  // By default, updates that start and end at the beginning of a line
+  // are treated specially, in order to make the association of line
+  // widgets and marker elements with the text behave more intuitive.
+  function isWholeLineUpdate(doc, change) {
+    return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
+      (!doc.cm || doc.cm.options.wholeLineUpdateBefore)
+  }
+
+  // Perform a change on the document data structure.
+  function updateDoc(doc, change, markedSpans, estimateHeight) {
+    function spansFor(n) {return markedSpans ? markedSpans[n] : null}
+    function update(line, text, spans) {
+      updateLine(line, text, spans, estimateHeight);
+      signalLater(line, "change", line, change);
+    }
+    function linesFor(start, end) {
+      var result = [];
+      for (var i = start; i < end; ++i)
+        { result.push(new Line(text[i], spansFor(i), estimateHeight)); }
+      return result
+    }
+
+    var from = change.from, to = change.to, text = change.text;
+    var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
+    var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
+
+    // Adjust the line structure
+    if (change.full) {
+      doc.insert(0, linesFor(0, text.length));
+      doc.remove(text.length, doc.size - text.length);
+    } else if (isWholeLineUpdate(doc, change)) {
+      // This is a whole-line replace. Treated specially to make
+      // sure line objects move the way they are supposed to.
+      var added = linesFor(0, text.length - 1);
+      update(lastLine, lastLine.text, lastSpans);
+      if (nlines) { doc.remove(from.line, nlines); }
+      if (added.length) { doc.insert(from.line, added); }
+    } else if (firstLine == lastLine) {
+      if (text.length == 1) {
+        update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
+      } else {
+        var added$1 = linesFor(1, text.length - 1);
+        added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight));
+        update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
+        doc.insert(from.line + 1, added$1);
+      }
+    } else if (text.length == 1) {
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
+      doc.remove(from.line + 1, nlines);
+    } else {
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
+      update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
+      var added$2 = linesFor(1, text.length - 1);
+      if (nlines > 1) { doc.remove(from.line + 1, nlines - 1); }
+      doc.insert(from.line + 1, added$2);
+    }
+
+    signalLater(doc, "change", doc, change);
+  }
+
+  // Call f for all linked documents.
+  function linkedDocs(doc, f, sharedHistOnly) {
+    function propagate(doc, skip, sharedHist) {
+      if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
+        var rel = doc.linked[i];
+        if (rel.doc == skip) { continue }
+        var shared = sharedHist && rel.sharedHist;
+        if (sharedHistOnly && !shared) { continue }
+        f(rel.doc, shared);
+        propagate(rel.doc, doc, shared);
+      } }
+    }
+    propagate(doc, null, true);
+  }
+
+  // Attach a document to an editor.
+  function attachDoc(cm, doc) {
+    if (doc.cm) { throw new Error("This document is already in use.") }
+    cm.doc = doc;
+    doc.cm = cm;
+    estimateLineHeights(cm);
+    loadMode(cm);
+    setDirectionClass(cm);
+    cm.options.direction = doc.direction;
+    if (!cm.options.lineWrapping) { findMaxLine(cm); }
+    cm.options.mode = doc.modeOption;
+    regChange(cm);
+  }
+
+  function setDirectionClass(cm) {
+  (cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl");
+  }
+
+  function directionChanged(cm) {
+    runInOp(cm, function () {
+      setDirectionClass(cm);
+      regChange(cm);
+    });
+  }
+
+  function History(prev) {
+    // Arrays of change events and selections. Doing something adds an
+    // event to done and clears undo. Undoing moves events from done
+    // to undone, redoing moves them in the other direction.
+    this.done = []; this.undone = [];
+    this.undoDepth = prev ? prev.undoDepth : Infinity;
+    // Used to track when changes can be merged into a single undo
+    // event
+    this.lastModTime = this.lastSelTime = 0;
+    this.lastOp = this.lastSelOp = null;
+    this.lastOrigin = this.lastSelOrigin = null;
+    // Used by the isClean() method
+    this.generation = this.maxGeneration = prev ? prev.maxGeneration : 1;
+  }
+
+  // Create a history change event from an updateDoc-style change
+  // object.
+  function historyChangeFromChange(doc, change) {
+    var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
+    attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
+    linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true);
+    return histChange
+  }
+
+  // Pop all selection events off the end of a history array. Stop at
+  // a change event.
+  function clearSelectionEvents(array) {
+    while (array.length) {
+      var last = lst(array);
+      if (last.ranges) { array.pop(); }
+      else { break }
+    }
+  }
+
+  // Find the top change event in the history. Pop off selection
+  // events that are in the way.
+  function lastChangeEvent(hist, force) {
+    if (force) {
+      clearSelectionEvents(hist.done);
+      return lst(hist.done)
+    } else if (hist.done.length && !lst(hist.done).ranges) {
+      return lst(hist.done)
+    } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
+      hist.done.pop();
+      return lst(hist.done)
+    }
+  }
+
+  // Register a change in the history. Merges changes that are within
+  // a single operation, or are close together with an origin that
+  // allows merging (starting with "+") into a single event.
+  function addChangeToHistory(doc, change, selAfter, opId) {
+    var hist = doc.history;
+    hist.undone.length = 0;
+    var time = +new Date, cur;
+    var last;
+
+    if ((hist.lastOp == opId ||
+         hist.lastOrigin == change.origin && change.origin &&
+         ((change.origin.charAt(0) == "+" && hist.lastModTime > time - (doc.cm ? doc.cm.options.historyEventDelay : 500)) ||
+          change.origin.charAt(0) == "*")) &&
+        (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
+      // Merge this change into the last event
+      last = lst(cur.changes);
+      if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
+        // Optimized case for simple insertion -- don't want to add
+        // new changesets for every character typed
+        last.to = changeEnd(change);
+      } else {
+        // Add new sub-event
+        cur.changes.push(historyChangeFromChange(doc, change));
+      }
+    } else {
+      // Can not be merged, start a new event.
+      var before = lst(hist.done);
+      if (!before || !before.ranges)
+        { pushSelectionToHistory(doc.sel, hist.done); }
+      cur = {changes: [historyChangeFromChange(doc, change)],
+             generation: hist.generation};
+      hist.done.push(cur);
+      while (hist.done.length > hist.undoDepth) {
+        hist.done.shift();
+        if (!hist.done[0].ranges) { hist.done.shift(); }
+      }
+    }
+    hist.done.push(selAfter);
+    hist.generation = ++hist.maxGeneration;
+    hist.lastModTime = hist.lastSelTime = time;
+    hist.lastOp = hist.lastSelOp = opId;
+    hist.lastOrigin = hist.lastSelOrigin = change.origin;
+
+    if (!last) { signal(doc, "historyAdded"); }
+  }
+
+  function selectionEventCanBeMerged(doc, origin, prev, sel) {
+    var ch = origin.charAt(0);
+    return ch == "*" ||
+      ch == "+" &&
+      prev.ranges.length == sel.ranges.length &&
+      prev.somethingSelected() == sel.somethingSelected() &&
+      new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
+  }
+
+  // Called whenever the selection changes, sets the new selection as
+  // the pending selection in the history, and pushes the old pending
+  // selection into the 'done' array when it was significantly
+  // different (in number of selected ranges, emptiness, or time).
+  function addSelectionToHistory(doc, sel, opId, options) {
+    var hist = doc.history, origin = options && options.origin;
+
+    // A new event is started when the previous origin does not match
+    // the current, or the origins don't allow matching. Origins
+    // starting with * are always merged, those starting with + are
+    // merged when similar and close together in time.
+    if (opId == hist.lastSelOp ||
+        (origin && hist.lastSelOrigin == origin &&
+         (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
+          selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
+      { hist.done[hist.done.length - 1] = sel; }
+    else
+      { pushSelectionToHistory(sel, hist.done); }
+
+    hist.lastSelTime = +new Date;
+    hist.lastSelOrigin = origin;
+    hist.lastSelOp = opId;
+    if (options && options.clearRedo !== false)
+      { clearSelectionEvents(hist.undone); }
+  }
+
+  function pushSelectionToHistory(sel, dest) {
+    var top = lst(dest);
+    if (!(top && top.ranges && top.equals(sel)))
+      { dest.push(sel); }
+  }
+
+  // Used to store marked span information in the history.
+  function attachLocalSpans(doc, change, from, to) {
+    var existing = change["spans_" + doc.id], n = 0;
+    doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
+      if (line.markedSpans)
+        { (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans; }
+      ++n;
+    });
+  }
+
+  // When un/re-doing restores text containing marked spans, those
+  // that have been explicitly cleared should not be restored.
+  function removeClearedSpans(spans) {
+    if (!spans) { return null }
+    var out;
+    for (var i = 0; i < spans.length; ++i) {
+      if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i); } }
+      else if (out) { out.push(spans[i]); }
+    }
+    return !out ? spans : out.length ? out : null
+  }
+
+  // Retrieve and filter the old marked spans stored in a change event.
+  function getOldSpans(doc, change) {
+    var found = change["spans_" + doc.id];
+    if (!found) { return null }
+    var nw = [];
+    for (var i = 0; i < change.text.length; ++i)
+      { nw.push(removeClearedSpans(found[i])); }
+    return nw
+  }
+
+  // Used for un/re-doing changes from the history. Combines the
+  // result of computing the existing spans with the set of spans that
+  // existed in the history (so that deleting around a span and then
+  // undoing brings back the span).
+  function mergeOldSpans(doc, change) {
+    var old = getOldSpans(doc, change);
+    var stretched = stretchSpansOverChange(doc, change);
+    if (!old) { return stretched }
+    if (!stretched) { return old }
+
+    for (var i = 0; i < old.length; ++i) {
+      var oldCur = old[i], stretchCur = stretched[i];
+      if (oldCur && stretchCur) {
+        spans: for (var j = 0; j < stretchCur.length; ++j) {
+          var span = stretchCur[j];
+          for (var k = 0; k < oldCur.length; ++k)
+            { if (oldCur[k].marker == span.marker) { continue spans } }
+          oldCur.push(span);
+        }
+      } else if (stretchCur) {
+        old[i] = stretchCur;
+      }
+    }
+    return old
+  }
+
+  // Used both to provide a JSON-safe object in .getHistory, and, when
+  // detaching a document, to split the history in two
+  function copyHistoryArray(events, newGroup, instantiateSel) {
+    var copy = [];
+    for (var i = 0; i < events.length; ++i) {
+      var event = events[i];
+      if (event.ranges) {
+        copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
+        continue
+      }
+      var changes = event.changes, newChanges = [];
+      copy.push({changes: newChanges});
+      for (var j = 0; j < changes.length; ++j) {
+        var change = changes[j], m = (void 0);
+        newChanges.push({from: change.from, to: change.to, text: change.text});
+        if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
+          if (indexOf(newGroup, Number(m[1])) > -1) {
+            lst(newChanges)[prop] = change[prop];
+            delete change[prop];
+          }
+        } } }
+      }
+    }
+    return copy
+  }
+
+  // The 'scroll' parameter given to many of these indicated whether
+  // the new cursor position should be scrolled into view after
+  // modifying the selection.
+
+  // If shift is held or the extend flag is set, extends a range to
+  // include a given position (and optionally a second position).
+  // Otherwise, simply returns the range between the given positions.
+  // Used for cursor motion and such.
+  function extendRange(range, head, other, extend) {
+    if (extend) {
+      var anchor = range.anchor;
+      if (other) {
+        var posBefore = cmp(head, anchor) < 0;
+        if (posBefore != (cmp(other, anchor) < 0)) {
+          anchor = head;
+          head = other;
+        } else if (posBefore != (cmp(head, other) < 0)) {
+          head = other;
+        }
+      }
+      return new Range(anchor, head)
+    } else {
+      return new Range(other || head, head)
+    }
+  }
+
+  // Extend the primary selection range, discard the rest.
+  function extendSelection(doc, head, other, options, extend) {
+    if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend); }
+    setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options);
+  }
+
+  // Extend all selections (pos is an array of selections with length
+  // equal the number of selections)
+  function extendSelections(doc, heads, options) {
+    var out = [];
+    var extend = doc.cm && (doc.cm.display.shift || doc.extend);
+    for (var i = 0; i < doc.sel.ranges.length; i++)
+      { out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend); }
+    var newSel = normalizeSelection(doc.cm, out, doc.sel.primIndex);
+    setSelection(doc, newSel, options);
+  }
+
+  // Updates a single range in the selection.
+  function replaceOneSelection(doc, i, range, options) {
+    var ranges = doc.sel.ranges.slice(0);
+    ranges[i] = range;
+    setSelection(doc, normalizeSelection(doc.cm, ranges, doc.sel.primIndex), options);
+  }
+
+  // Reset the selection to a single range.
+  function setSimpleSelection(doc, anchor, head, options) {
+    setSelection(doc, simpleSelection(anchor, head), options);
+  }
+
+  // Give beforeSelectionChange handlers a change to influence a
+  // selection update.
+  function filterSelectionChange(doc, sel, options) {
+    var obj = {
+      ranges: sel.ranges,
+      update: function(ranges) {
+        this.ranges = [];
+        for (var i = 0; i < ranges.length; i++)
+          { this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
+                                     clipPos(doc, ranges[i].head)); }
+      },
+      origin: options && options.origin
+    };
+    signal(doc, "beforeSelectionChange", doc, obj);
+    if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj); }
+    if (obj.ranges != sel.ranges) { return normalizeSelection(doc.cm, obj.ranges, obj.ranges.length - 1) }
+    else { return sel }
+  }
+
+  function setSelectionReplaceHistory(doc, sel, options) {
+    var done = doc.history.done, last = lst(done);
+    if (last && last.ranges) {
+      done[done.length - 1] = sel;
+      setSelectionNoUndo(doc, sel, options);
+    } else {
+      setSelection(doc, sel, options);
+    }
+  }
+
+  // Set a new selection.
+  function setSelection(doc, sel, options) {
+    setSelectionNoUndo(doc, sel, options);
+    addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);
+  }
+
+  function setSelectionNoUndo(doc, sel, options) {
+    if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
+      { sel = filterSelectionChange(doc, sel, options); }
+
+    var bias = options && options.bias ||
+      (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
+    setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));
+
+    if (!(options && options.scroll === false) && doc.cm && doc.cm.getOption("readOnly") != "nocursor")
+      { ensureCursorVisible(doc.cm); }
+  }
+
+  function setSelectionInner(doc, sel) {
+    if (sel.equals(doc.sel)) { return }
+
+    doc.sel = sel;
+
+    if (doc.cm) {
+      doc.cm.curOp.updateInput = 1;
+      doc.cm.curOp.selectionChanged = true;
+      signalCursorActivity(doc.cm);
+    }
+    signalLater(doc, "cursorActivity", doc);
+  }
+
+  // Verify that the selection does not partially select any atomic
+  // marked ranges.
+  function reCheckSelection(doc) {
+    setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false));
+  }
+
+  // Return a selection that does not partially select any atomic
+  // ranges.
+  function skipAtomicInSelection(doc, sel, bias, mayClear) {
+    var out;
+    for (var i = 0; i < sel.ranges.length; i++) {
+      var range = sel.ranges[i];
+      var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
+      var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
+      var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear);
+      if (out || newAnchor != range.anchor || newHead != range.head) {
+        if (!out) { out = sel.ranges.slice(0, i); }
+        out[i] = new Range(newAnchor, newHead);
+      }
+    }
+    return out ? normalizeSelection(doc.cm, out, sel.primIndex) : sel
+  }
+
+  function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
+    var line = getLine(doc, pos.line);
+    if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+      var sp = line.markedSpans[i], m = sp.marker;
+
+      // Determine if we should prevent the cursor being placed to the left/right of an atomic marker
+      // Historically this was determined using the inclusiveLeft/Right option, but the new way to control it
+      // is with selectLeft/Right
+      var preventCursorLeft = ("selectLeft" in m) ? !m.selectLeft : m.inclusiveLeft;
+      var preventCursorRight = ("selectRight" in m) ? !m.selectRight : m.inclusiveRight;
+
+      if ((sp.from == null || (preventCursorLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
+          (sp.to == null || (preventCursorRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
+        if (mayClear) {
+          signal(m, "beforeCursorEnter");
+          if (m.explicitlyCleared) {
+            if (!line.markedSpans) { break }
+            else {--i; continue}
+          }
+        }
+        if (!m.atomic) { continue }
+
+        if (oldPos) {
+          var near = m.find(dir < 0 ? 1 : -1), diff = (void 0);
+          if (dir < 0 ? preventCursorRight : preventCursorLeft)
+            { near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null); }
+          if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
+            { return skipAtomicInner(doc, near, pos, dir, mayClear) }
+        }
+
+        var far = m.find(dir < 0 ? -1 : 1);
+        if (dir < 0 ? preventCursorLeft : preventCursorRight)
+          { far = movePos(doc, far, dir, far.line == pos.line ? line : null); }
+        return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
+      }
+    } }
+    return pos
+  }
+
+  // Ensure a given position is not inside an atomic range.
+  function skipAtomic(doc, pos, oldPos, bias, mayClear) {
+    var dir = bias || 1;
+    var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
+        (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
+        skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
+        (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
+    if (!found) {
+      doc.cantEdit = true;
+      return Pos(doc.first, 0)
+    }
+    return found
+  }
+
+  function movePos(doc, pos, dir, line) {
+    if (dir < 0 && pos.ch == 0) {
+      if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
+      else { return null }
+    } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
+      if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
+      else { return null }
+    } else {
+      return new Pos(pos.line, pos.ch + dir)
+    }
+  }
+
+  function selectAll(cm) {
+    cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);
+  }
+
+  // UPDATING
+
+  // Allow "beforeChange" event handlers to influence a change
+  function filterChange(doc, change, update) {
+    var obj = {
+      canceled: false,
+      from: change.from,
+      to: change.to,
+      text: change.text,
+      origin: change.origin,
+      cancel: function () { return obj.canceled = true; }
+    };
+    if (update) { obj.update = function (from, to, text, origin) {
+      if (from) { obj.from = clipPos(doc, from); }
+      if (to) { obj.to = clipPos(doc, to); }
+      if (text) { obj.text = text; }
+      if (origin !== undefined) { obj.origin = origin; }
+    }; }
+    signal(doc, "beforeChange", doc, obj);
+    if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj); }
+
+    if (obj.canceled) {
+      if (doc.cm) { doc.cm.curOp.updateInput = 2; }
+      return null
+    }
+    return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
+  }
+
+  // Apply a change to a document, and add it to the document's
+  // history, and propagating it to all linked documents.
+  function makeChange(doc, change, ignoreReadOnly) {
+    if (doc.cm) {
+      if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
+      if (doc.cm.state.suppressEdits) { return }
+    }
+
+    if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
+      change = filterChange(doc, change, true);
+      if (!change) { return }
+    }
+
+    // Possibly split or suppress the update based on the presence
+    // of read-only spans in its range.
+    var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
+    if (split) {
+      for (var i = split.length - 1; i >= 0; --i)
+        { makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text, origin: change.origin}); }
+    } else {
+      makeChangeInner(doc, change);
+    }
+  }
+
+  function makeChangeInner(doc, change) {
+    if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
+    var selAfter = computeSelAfterChange(doc, change);
+    addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
+
+    makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
+    var rebased = [];
+
+    linkedDocs(doc, function (doc, sharedHist) {
+      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+        rebaseHist(doc.history, change);
+        rebased.push(doc.history);
+      }
+      makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
+    });
+  }
+
+  // Revert a change stored in a document's history.
+  function makeChangeFromHistory(doc, type, allowSelectionOnly) {
+    var suppress = doc.cm && doc.cm.state.suppressEdits;
+    if (suppress && !allowSelectionOnly) { return }
+
+    var hist = doc.history, event, selAfter = doc.sel;
+    var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;
+
+    // Verify that there is a useable event (so that ctrl-z won't
+    // needlessly clear selection events)
+    var i = 0;
+    for (; i < source.length; i++) {
+      event = source[i];
+      if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
+        { break }
+    }
+    if (i == source.length) { return }
+    hist.lastOrigin = hist.lastSelOrigin = null;
+
+    for (;;) {
+      event = source.pop();
+      if (event.ranges) {
+        pushSelectionToHistory(event, dest);
+        if (allowSelectionOnly && !event.equals(doc.sel)) {
+          setSelection(doc, event, {clearRedo: false});
+          return
+        }
+        selAfter = event;
+      } else if (suppress) {
+        source.push(event);
+        return
+      } else { break }
+    }
+
+    // Build up a reverse change object to add to the opposite history
+    // stack (redo when undoing, and vice versa).
+    var antiChanges = [];
+    pushSelectionToHistory(selAfter, dest);
+    dest.push({changes: antiChanges, generation: hist.generation});
+    hist.generation = event.generation || ++hist.maxGeneration;
+
+    var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
+
+    var loop = function ( i ) {
+      var change = event.changes[i];
+      change.origin = type;
+      if (filter && !filterChange(doc, change, false)) {
+        source.length = 0;
+        return {}
+      }
+
+      antiChanges.push(historyChangeFromChange(doc, change));
+
+      var after = i ? computeSelAfterChange(doc, change) : lst(source);
+      makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
+      if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}); }
+      var rebased = [];
+
+      // Propagate to the linked documents
+      linkedDocs(doc, function (doc, sharedHist) {
+        if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+          rebaseHist(doc.history, change);
+          rebased.push(doc.history);
+        }
+        makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
+      });
+    };
+
+    for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
+      var returned = loop( i$1 );
+
+      if ( returned ) return returned.v;
+    }
+  }
+
+  // Sub-views need their line numbers shifted when text is added
+  // above or below them in the parent document.
+  function shiftDoc(doc, distance) {
+    if (distance == 0) { return }
+    doc.first += distance;
+    doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
+      Pos(range.anchor.line + distance, range.anchor.ch),
+      Pos(range.head.line + distance, range.head.ch)
+    ); }), doc.sel.primIndex);
+    if (doc.cm) {
+      regChange(doc.cm, doc.first, doc.first - distance, distance);
+      for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
+        { regLineChange(doc.cm, l, "gutter"); }
+    }
+  }
+
+  // More lower-level change function, handling only a single document
+  // (not linked ones).
+  function makeChangeSingleDoc(doc, change, selAfter, spans) {
+    if (doc.cm && !doc.cm.curOp)
+      { return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }
+
+    if (change.to.line < doc.first) {
+      shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
+      return
+    }
+    if (change.from.line > doc.lastLine()) { return }
+
+    // Clip the change to the size of this doc
+    if (change.from.line < doc.first) {
+      var shift = change.text.length - 1 - (doc.first - change.from.line);
+      shiftDoc(doc, shift);
+      change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
+                text: [lst(change.text)], origin: change.origin};
+    }
+    var last = doc.lastLine();
+    if (change.to.line > last) {
+      change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
+                text: [change.text[0]], origin: change.origin};
+    }
+
+    change.removed = getBetween(doc, change.from, change.to);
+
+    if (!selAfter) { selAfter = computeSelAfterChange(doc, change); }
+    if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans); }
+    else { updateDoc(doc, change, spans); }
+    setSelectionNoUndo(doc, selAfter, sel_dontScroll);
+
+    if (doc.cantEdit && skipAtomic(doc, Pos(doc.firstLine(), 0)))
+      { doc.cantEdit = false; }
+  }
+
+  // Handle the interaction of a change to a document with the editor
+  // that this document is part of.
+  function makeChangeSingleDocInEditor(cm, change, spans) {
+    var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
+
+    var recomputeMaxLength = false, checkWidthStart = from.line;
+    if (!cm.options.lineWrapping) {
+      checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
+      doc.iter(checkWidthStart, to.line + 1, function (line) {
+        if (line == display.maxLine) {
+          recomputeMaxLength = true;
+          return true
+        }
+      });
+    }
+
+    if (doc.sel.contains(change.from, change.to) > -1)
+      { signalCursorActivity(cm); }
+
+    updateDoc(doc, change, spans, estimateHeight(cm));
+
+    if (!cm.options.lineWrapping) {
+      doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
+        var len = lineLength(line);
+        if (len > display.maxLineLength) {
+          display.maxLine = line;
+          display.maxLineLength = len;
+          display.maxLineChanged = true;
+          recomputeMaxLength = false;
+        }
+      });
+      if (recomputeMaxLength) { cm.curOp.updateMaxLine = true; }
+    }
+
+    retreatFrontier(doc, from.line);
+    startWorker(cm, 400);
+
+    var lendiff = change.text.length - (to.line - from.line) - 1;
+    // Remember that these lines changed, for updating the display
+    if (change.full)
+      { regChange(cm); }
+    else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
+      { regLineChange(cm, from.line, "text"); }
+    else
+      { regChange(cm, from.line, to.line + 1, lendiff); }
+
+    var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
+    if (changeHandler || changesHandler) {
+      var obj = {
+        from: from, to: to,
+        text: change.text,
+        removed: change.removed,
+        origin: change.origin
+      };
+      if (changeHandler) { signalLater(cm, "change", cm, obj); }
+      if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj); }
+    }
+    cm.display.selForContextMenu = null;
+  }
+
+  function replaceRange(doc, code, from, to, origin) {
+    var assign;
+
+    if (!to) { to = from; }
+    if (cmp(to, from) < 0) { (assign = [to, from], from = assign[0], to = assign[1]); }
+    if (typeof code == "string") { code = doc.splitLines(code); }
+    makeChange(doc, {from: from, to: to, text: code, origin: origin});
+  }
+
+  // Rebasing/resetting history to deal with externally-sourced changes
+
+  function rebaseHistSelSingle(pos, from, to, diff) {
+    if (to < pos.line) {
+      pos.line += diff;
+    } else if (from < pos.line) {
+      pos.line = from;
+      pos.ch = 0;
+    }
+  }
+
+  // Tries to rebase an array of history events given a change in the
+  // document. If the change touches the same lines as the event, the
+  // event, and everything 'behind' it, is discarded. If the change is
+  // before the event, the event's positions are updated. Uses a
+  // copy-on-write scheme for the positions, to avoid having to
+  // reallocate them all on every rebase, but also avoid problems with
+  // shared position objects being unsafely updated.
+  function rebaseHistArray(array, from, to, diff) {
+    for (var i = 0; i < array.length; ++i) {
+      var sub = array[i], ok = true;
+      if (sub.ranges) {
+        if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
+        for (var j = 0; j < sub.ranges.length; j++) {
+          rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
+          rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
+        }
+        continue
+      }
+      for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
+        var cur = sub.changes[j$1];
+        if (to < cur.from.line) {
+          cur.from = Pos(cur.from.line + diff, cur.from.ch);
+          cur.to = Pos(cur.to.line + diff, cur.to.ch);
+        } else if (from <= cur.to.line) {
+          ok = false;
+          break
+        }
+      }
+      if (!ok) {
+        array.splice(0, i + 1);
+        i = 0;
+      }
+    }
+  }
+
+  function rebaseHist(hist, change) {
+    var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
+    rebaseHistArray(hist.done, from, to, diff);
+    rebaseHistArray(hist.undone, from, to, diff);
+  }
+
+  // Utility for applying a change to a line by handle or number,
+  // returning the number and optionally registering the line as
+  // changed.
+  function changeLine(doc, handle, changeType, op) {
+    var no = handle, line = handle;
+    if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)); }
+    else { no = lineNo(handle); }
+    if (no == null) { return null }
+    if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType); }
+    return line
+  }
+
+  // The document is represented as a BTree consisting of leaves, with
+  // chunk of lines in them, and branches, with up to ten leaves or
+  // other branch nodes below them. The top node is always a branch
+  // node, and is the document object itself (meaning it has
+  // additional methods and properties).
+  //
+  // All nodes have parent links. The tree is used both to go from
+  // line numbers to line objects, and to go from objects to numbers.
+  // It also indexes by height, and is used to convert between height
+  // and line object, and to find the total height of the document.
+  //
+  // See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
+
+  function LeafChunk(lines) {
+    this.lines = lines;
+    this.parent = null;
+    var height = 0;
+    for (var i = 0; i < lines.length; ++i) {
+      lines[i].parent = this;
+      height += lines[i].height;
+    }
+    this.height = height;
+  }
+
+  LeafChunk.prototype = {
+    chunkSize: function() { return this.lines.length },
+
+    // Remove the n lines at offset 'at'.
+    removeInner: function(at, n) {
+      for (var i = at, e = at + n; i < e; ++i) {
+        var line = this.lines[i];
+        this.height -= line.height;
+        cleanUpLine(line);
+        signalLater(line, "delete");
+      }
+      this.lines.splice(at, n);
+    },
+
+    // Helper used to collapse a small branch into a single leaf.
+    collapse: function(lines) {
+      lines.push.apply(lines, this.lines);
+    },
+
+    // Insert the given array of lines at offset 'at', count them as
+    // having the given height.
+    insertInner: function(at, lines, height) {
+      this.height += height;
+      this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
+      for (var i = 0; i < lines.length; ++i) { lines[i].parent = this; }
+    },
+
+    // Used to iterate over a part of the tree.
+    iterN: function(at, n, op) {
+      for (var e = at + n; at < e; ++at)
+        { if (op(this.lines[at])) { return true } }
+    }
+  };
+
+  function BranchChunk(children) {
+    this.children = children;
+    var size = 0, height = 0;
+    for (var i = 0; i < children.length; ++i) {
+      var ch = children[i];
+      size += ch.chunkSize(); height += ch.height;
+      ch.parent = this;
+    }
+    this.size = size;
+    this.height = height;
+    this.parent = null;
+  }
+
+  BranchChunk.prototype = {
+    chunkSize: function() { return this.size },
+
+    removeInner: function(at, n) {
+      this.size -= n;
+      for (var i = 0; i < this.children.length; ++i) {
+        var child = this.children[i], sz = child.chunkSize();
+        if (at < sz) {
+          var rm = Math.min(n, sz - at), oldHeight = child.height;
+          child.removeInner(at, rm);
+          this.height -= oldHeight - child.height;
+          if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
+          if ((n -= rm) == 0) { break }
+          at = 0;
+        } else { at -= sz; }
+      }
+      // If the result is smaller than 25 lines, ensure that it is a
+      // single leaf node.
+      if (this.size - n < 25 &&
+          (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
+        var lines = [];
+        this.collapse(lines);
+        this.children = [new LeafChunk(lines)];
+        this.children[0].parent = this;
+      }
+    },
+
+    collapse: function(lines) {
+      for (var i = 0; i < this.children.length; ++i) { this.children[i].collapse(lines); }
+    },
+
+    insertInner: function(at, lines, height) {
+      this.size += lines.length;
+      this.height += height;
+      for (var i = 0; i < this.children.length; ++i) {
+        var child = this.children[i], sz = child.chunkSize();
+        if (at <= sz) {
+          child.insertInner(at, lines, height);
+          if (child.lines && child.lines.length > 50) {
+            // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
+            // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
+            var remaining = child.lines.length % 25 + 25;
+            for (var pos = remaining; pos < child.lines.length;) {
+              var leaf = new LeafChunk(child.lines.slice(pos, pos += 25));
+              child.height -= leaf.height;
+              this.children.splice(++i, 0, leaf);
+              leaf.parent = this;
+            }
+            child.lines = child.lines.slice(0, remaining);
+            this.maybeSpill();
+          }
+          break
+        }
+        at -= sz;
+      }
+    },
+
+    // When a node has grown, check whether it should be split.
+    maybeSpill: function() {
+      if (this.children.length <= 10) { return }
+      var me = this;
+      do {
+        var spilled = me.children.splice(me.children.length - 5, 5);
+        var sibling = new BranchChunk(spilled);
+        if (!me.parent) { // Become the parent node
+          var copy = new BranchChunk(me.children);
+          copy.parent = me;
+          me.children = [copy, sibling];
+          me = copy;
+       } else {
+          me.size -= sibling.size;
+          me.height -= sibling.height;
+          var myIndex = indexOf(me.parent.children, me);
+          me.parent.children.splice(myIndex + 1, 0, sibling);
+        }
+        sibling.parent = me.parent;
+      } while (me.children.length > 10)
+      me.parent.maybeSpill();
+    },
+
+    iterN: function(at, n, op) {
+      for (var i = 0; i < this.children.length; ++i) {
+        var child = this.children[i], sz = child.chunkSize();
+        if (at < sz) {
+          var used = Math.min(n, sz - at);
+          if (child.iterN(at, used, op)) { return true }
+          if ((n -= used) == 0) { break }
+          at = 0;
+        } else { at -= sz; }
+      }
+    }
+  };
+
+  // Line widgets are block elements displayed above or below a line.
+
+  var LineWidget = function(doc, node, options) {
+    if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
+      { this[opt] = options[opt]; } } }
+    this.doc = doc;
+    this.node = node;
+  };
+
+  LineWidget.prototype.clear = function () {
+    var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
+    if (no == null || !ws) { return }
+    for (var i = 0; i < ws.length; ++i) { if (ws[i] == this) { ws.splice(i--, 1); } }
+    if (!ws.length) { line.widgets = null; }
+    var height = widgetHeight(this);
+    updateLineHeight(line, Math.max(0, line.height - height));
+    if (cm) {
+      runInOp(cm, function () {
+        adjustScrollWhenAboveVisible(cm, line, -height);
+        regLineChange(cm, no, "widget");
+      });
+      signalLater(cm, "lineWidgetCleared", cm, this, no);
+    }
+  };
+
+  LineWidget.prototype.changed = function () {
+      var this$1 = this;
+
+    var oldH = this.height, cm = this.doc.cm, line = this.line;
+    this.height = null;
+    var diff = widgetHeight(this) - oldH;
+    if (!diff) { return }
+    if (!lineIsHidden(this.doc, line)) { updateLineHeight(line, line.height + diff); }
+    if (cm) {
+      runInOp(cm, function () {
+        cm.curOp.forceUpdate = true;
+        adjustScrollWhenAboveVisible(cm, line, diff);
+        signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line));
+      });
+    }
+  };
+  eventMixin(LineWidget);
+
+  function adjustScrollWhenAboveVisible(cm, line, diff) {
+    if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
+      { addToScrollTop(cm, diff); }
+  }
+
+  function addLineWidget(doc, handle, node, options) {
+    var widget = new LineWidget(doc, node, options);
+    var cm = doc.cm;
+    if (cm && widget.noHScroll) { cm.display.alignWidgets = true; }
+    changeLine(doc, handle, "widget", function (line) {
+      var widgets = line.widgets || (line.widgets = []);
+      if (widget.insertAt == null) { widgets.push(widget); }
+      else { widgets.splice(Math.min(widgets.length, Math.max(0, widget.insertAt)), 0, widget); }
+      widget.line = line;
+      if (cm && !lineIsHidden(doc, line)) {
+        var aboveVisible = heightAtLine(line) < doc.scrollTop;
+        updateLineHeight(line, line.height + widgetHeight(widget));
+        if (aboveVisible) { addToScrollTop(cm, widget.height); }
+        cm.curOp.forceUpdate = true;
+      }
+      return true
+    });
+    if (cm) { signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle)); }
+    return widget
+  }
+
+  // TEXTMARKERS
+
+  // Created with markText and setBookmark methods. A TextMarker is a
+  // handle that can be used to clear or find a marked position in the
+  // document. Line objects hold arrays (markedSpans) containing
+  // {from, to, marker} object pointing to such marker objects, and
+  // indicating that such a marker is present on that line. Multiple
+  // lines may point to the same marker when it spans across lines.
+  // The spans will have null for their from/to properties when the
+  // marker continues beyond the start/end of the line. Markers have
+  // links back to the lines they currently touch.
+
+  // Collapsed markers have unique ids, in order to be able to order
+  // them, which is needed for uniquely determining an outer marker
+  // when they overlap (they may nest, but not partially overlap).
+  var nextMarkerId = 0;
+
+  var TextMarker = function(doc, type) {
+    this.lines = [];
+    this.type = type;
+    this.doc = doc;
+    this.id = ++nextMarkerId;
+  };
+
+  // Clear the marker.
+  TextMarker.prototype.clear = function () {
+    if (this.explicitlyCleared) { return }
+    var cm = this.doc.cm, withOp = cm && !cm.curOp;
+    if (withOp) { startOperation(cm); }
+    if (hasHandler(this, "clear")) {
+      var found = this.find();
+      if (found) { signalLater(this, "clear", found.from, found.to); }
+    }
+    var min = null, max = null;
+    for (var i = 0; i < this.lines.length; ++i) {
+      var line = this.lines[i];
+      var span = getMarkedSpanFor(line.markedSpans, this);
+      if (cm && !this.collapsed) { regLineChange(cm, lineNo(line), "text"); }
+      else if (cm) {
+        if (span.to != null) { max = lineNo(line); }
+        if (span.from != null) { min = lineNo(line); }
+      }
+      line.markedSpans = removeMarkedSpan(line.markedSpans, span);
+      if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) && cm)
+        { updateLineHeight(line, textHeight(cm.display)); }
+    }
+    if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
+      var visual = visualLine(this.lines[i$1]), len = lineLength(visual);
+      if (len > cm.display.maxLineLength) {
+        cm.display.maxLine = visual;
+        cm.display.maxLineLength = len;
+        cm.display.maxLineChanged = true;
+      }
+    } }
+
+    if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1); }
+    this.lines.length = 0;
+    this.explicitlyCleared = true;
+    if (this.atomic && this.doc.cantEdit) {
+      this.doc.cantEdit = false;
+      if (cm) { reCheckSelection(cm.doc); }
+    }
+    if (cm) { signalLater(cm, "markerCleared", cm, this, min, max); }
+    if (withOp) { endOperation(cm); }
+    if (this.parent) { this.parent.clear(); }
+  };
+
+  // Find the position of the marker in the document. Returns a {from,
+  // to} object by default. Side can be passed to get a specific side
+  // -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
+  // Pos objects returned contain a line object, rather than a line
+  // number (used to prevent looking up the same line twice).
+  TextMarker.prototype.find = function (side, lineObj) {
+    if (side == null && this.type == "bookmark") { side = 1; }
+    var from, to;
+    for (var i = 0; i < this.lines.length; ++i) {
+      var line = this.lines[i];
+      var span = getMarkedSpanFor(line.markedSpans, this);
+      if (span.from != null) {
+        from = Pos(lineObj ? line : lineNo(line), span.from);
+        if (side == -1) { return from }
+      }
+      if (span.to != null) {
+        to = Pos(lineObj ? line : lineNo(line), span.to);
+        if (side == 1) { return to }
+      }
+    }
+    return from && {from: from, to: to}
+  };
+
+  // Signals that the marker's widget changed, and surrounding layout
+  // should be recomputed.
+  TextMarker.prototype.changed = function () {
+      var this$1 = this;
+
+    var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
+    if (!pos || !cm) { return }
+    runInOp(cm, function () {
+      var line = pos.line, lineN = lineNo(pos.line);
+      var view = findViewForLine(cm, lineN);
+      if (view) {
+        clearLineMeasurementCacheFor(view);
+        cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
+      }
+      cm.curOp.updateMaxLine = true;
+      if (!lineIsHidden(widget.doc, line) && widget.height != null) {
+        var oldHeight = widget.height;
+        widget.height = null;
+        var dHeight = widgetHeight(widget) - oldHeight;
+        if (dHeight)
+          { updateLineHeight(line, line.height + dHeight); }
+      }
+      signalLater(cm, "markerChanged", cm, this$1);
+    });
+  };
+
+  TextMarker.prototype.attachLine = function (line) {
+    if (!this.lines.length && this.doc.cm) {
+      var op = this.doc.cm.curOp;
+      if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
+        { (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this); }
+    }
+    this.lines.push(line);
+  };
+
+  TextMarker.prototype.detachLine = function (line) {
+    this.lines.splice(indexOf(this.lines, line), 1);
+    if (!this.lines.length && this.doc.cm) {
+      var op = this.doc.cm.curOp
+      ;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
+    }
+  };
+  eventMixin(TextMarker);
+
+  // Create a marker, wire it up to the right lines, and
+  function markText(doc, from, to, options, type) {
+    // Shared markers (across linked documents) are handled separately
+    // (markTextShared will call out to this again, once per
+    // document).
+    if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
+    // Ensure we are in an operation.
+    if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }
+
+    var marker = new TextMarker(doc, type), diff = cmp(from, to);
+    if (options) { copyObj(options, marker, false); }
+    // Don't connect empty markers unless clearWhenEmpty is false
+    if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
+      { return marker }
+    if (marker.replacedWith) {
+      // Showing up as a widget implies collapsed (widget replaces text)
+      marker.collapsed = true;
+      marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget");
+      if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true"); }
+      if (options.insertLeft) { marker.widgetNode.insertLeft = true; }
+    }
+    if (marker.collapsed) {
+      if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
+          from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
+        { throw new Error("Inserting collapsed marker partially overlapping an existing one") }
+      seeCollapsedSpans();
+    }
+
+    if (marker.addToHistory)
+      { addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN); }
+
+    var curLine = from.line, cm = doc.cm, updateMaxLine;
+    doc.iter(curLine, to.line + 1, function (line) {
+      if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
+        { updateMaxLine = true; }
+      if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0); }
+      addMarkedSpan(line, new MarkedSpan(marker,
+                                         curLine == from.line ? from.ch : null,
+                                         curLine == to.line ? to.ch : null), doc.cm && doc.cm.curOp);
+      ++curLine;
+    });
+    // lineIsHidden depends on the presence of the spans, so needs a second pass
+    if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
+      if (lineIsHidden(doc, line)) { updateLineHeight(line, 0); }
+    }); }
+
+    if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }); }
+
+    if (marker.readOnly) {
+      seeReadOnlySpans();
+      if (doc.history.done.length || doc.history.undone.length)
+        { doc.clearHistory(); }
+    }
+    if (marker.collapsed) {
+      marker.id = ++nextMarkerId;
+      marker.atomic = true;
+    }
+    if (cm) {
+      // Sync editor state
+      if (updateMaxLine) { cm.curOp.updateMaxLine = true; }
+      if (marker.collapsed)
+        { regChange(cm, from.line, to.line + 1); }
+      else if (marker.className || marker.startStyle || marker.endStyle || marker.css ||
+               marker.attributes || marker.title)
+        { for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text"); } }
+      if (marker.atomic) { reCheckSelection(cm.doc); }
+      signalLater(cm, "markerAdded", cm, marker);
+    }
+    return marker
+  }
+
+  // SHARED TEXTMARKERS
+
+  // A shared marker spans multiple linked documents. It is
+  // implemented as a meta-marker-object controlling multiple normal
+  // markers.
+  var SharedTextMarker = function(markers, primary) {
+    this.markers = markers;
+    this.primary = primary;
+    for (var i = 0; i < markers.length; ++i)
+      { markers[i].parent = this; }
+  };
+
+  SharedTextMarker.prototype.clear = function () {
+    if (this.explicitlyCleared) { return }
+    this.explicitlyCleared = true;
+    for (var i = 0; i < this.markers.length; ++i)
+      { this.markers[i].clear(); }
+    signalLater(this, "clear");
+  };
+
+  SharedTextMarker.prototype.find = function (side, lineObj) {
+    return this.primary.find(side, lineObj)
+  };
+  eventMixin(SharedTextMarker);
+
+  function markTextShared(doc, from, to, options, type) {
+    options = copyObj(options);
+    options.shared = false;
+    var markers = [markText(doc, from, to, options, type)], primary = markers[0];
+    var widget = options.widgetNode;
+    linkedDocs(doc, function (doc) {
+      if (widget) { options.widgetNode = widget.cloneNode(true); }
+      markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
+      for (var i = 0; i < doc.linked.length; ++i)
+        { if (doc.linked[i].isParent) { return } }
+      primary = lst(markers);
+    });
+    return new SharedTextMarker(markers, primary)
+  }
+
+  function findSharedMarkers(doc) {
+    return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
+  }
+
+  function copySharedMarkers(doc, markers) {
+    for (var i = 0; i < markers.length; i++) {
+      var marker = markers[i], pos = marker.find();
+      var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
+      if (cmp(mFrom, mTo)) {
+        var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
+        marker.markers.push(subMark);
+        subMark.parent = marker;
+      }
+    }
+  }
+
+  function detachSharedMarkers(markers) {
+    var loop = function ( i ) {
+      var marker = markers[i], linked = [marker.primary.doc];
+      linkedDocs(marker.primary.doc, function (d) { return linked.push(d); });
+      for (var j = 0; j < marker.markers.length; j++) {
+        var subMarker = marker.markers[j];
+        if (indexOf(linked, subMarker.doc) == -1) {
+          subMarker.parent = null;
+          marker.markers.splice(j--, 1);
+        }
+      }
+    };
+
+    for (var i = 0; i < markers.length; i++) loop( i );
+  }
+
+  var nextDocId = 0;
+  var Doc = function(text, mode, firstLine, lineSep, direction) {
+    if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
+    if (firstLine == null) { firstLine = 0; }
+
+    BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
+    this.first = firstLine;
+    this.scrollTop = this.scrollLeft = 0;
+    this.cantEdit = false;
+    this.cleanGeneration = 1;
+    this.modeFrontier = this.highlightFrontier = firstLine;
+    var start = Pos(firstLine, 0);
+    this.sel = simpleSelection(start);
+    this.history = new History(null);
+    this.id = ++nextDocId;
+    this.modeOption = mode;
+    this.lineSep = lineSep;
+    this.direction = (direction == "rtl") ? "rtl" : "ltr";
+    this.extend = false;
+
+    if (typeof text == "string") { text = this.splitLines(text); }
+    updateDoc(this, {from: start, to: start, text: text});
+    setSelection(this, simpleSelection(start), sel_dontScroll);
+  };
+
+  Doc.prototype = createObj(BranchChunk.prototype, {
+    constructor: Doc,
+    // Iterate over the document. Supports two forms -- with only one
+    // argument, it calls that for each line in the document. With
+    // three, it iterates over the range given by the first two (with
+    // the second being non-inclusive).
+    iter: function(from, to, op) {
+      if (op) { this.iterN(from - this.first, to - from, op); }
+      else { this.iterN(this.first, this.first + this.size, from); }
+    },
+
+    // Non-public interface for adding and removing lines.
+    insert: function(at, lines) {
+      var height = 0;
+      for (var i = 0; i < lines.length; ++i) { height += lines[i].height; }
+      this.insertInner(at - this.first, lines, height);
+    },
+    remove: function(at, n) { this.removeInner(at - this.first, n); },
+
+    // From here, the methods are part of the public interface. Most
+    // are also available from CodeMirror (editor) instances.
+
+    getValue: function(lineSep) {
+      var lines = getLines(this, this.first, this.first + this.size);
+      if (lineSep === false) { return lines }
+      return lines.join(lineSep || this.lineSeparator())
+    },
+    setValue: docMethodOp(function(code) {
+      var top = Pos(this.first, 0), last = this.first + this.size - 1;
+      makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
+                        text: this.splitLines(code), origin: "setValue", full: true}, true);
+      if (this.cm) { scrollToCoords(this.cm, 0, 0); }
+      setSelection(this, simpleSelection(top), sel_dontScroll);
+    }),
+    replaceRange: function(code, from, to, origin) {
+      from = clipPos(this, from);
+      to = to ? clipPos(this, to) : from;
+      replaceRange(this, code, from, to, origin);
+    },
+    getRange: function(from, to, lineSep) {
+      var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
+      if (lineSep === false) { return lines }
+      if (lineSep === '') { return lines.join('') }
+      return lines.join(lineSep || this.lineSeparator())
+    },
+
+    getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},
+
+    getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
+    getLineNumber: function(line) {return lineNo(line)},
+
+    getLineHandleVisualStart: function(line) {
+      if (typeof line == "number") { line = getLine(this, line); }
+      return visualLine(line)
+    },
+
+    lineCount: function() {return this.size},
+    firstLine: function() {return this.first},
+    lastLine: function() {return this.first + this.size - 1},
+
+    clipPos: function(pos) {return clipPos(this, pos)},
+
+    getCursor: function(start) {
+      var range = this.sel.primary(), pos;
+      if (start == null || start == "head") { pos = range.head; }
+      else if (start == "anchor") { pos = range.anchor; }
+      else if (start == "end" || start == "to" || start === false) { pos = range.to(); }
+      else { pos = range.from(); }
+      return pos
+    },
+    listSelections: function() { return this.sel.ranges },
+    somethingSelected: function() {return this.sel.somethingSelected()},
+
+    setCursor: docMethodOp(function(line, ch, options) {
+      setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
+    }),
+    setSelection: docMethodOp(function(anchor, head, options) {
+      setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
+    }),
+    extendSelection: docMethodOp(function(head, other, options) {
+      extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
+    }),
+    extendSelections: docMethodOp(function(heads, options) {
+      extendSelections(this, clipPosArray(this, heads), options);
+    }),
+    extendSelectionsBy: docMethodOp(function(f, options) {
+      var heads = map(this.sel.ranges, f);
+      extendSelections(this, clipPosArray(this, heads), options);
+    }),
+    setSelections: docMethodOp(function(ranges, primary, options) {
+      if (!ranges.length) { return }
+      var out = [];
+      for (var i = 0; i < ranges.length; i++)
+        { out[i] = new Range(clipPos(this, ranges[i].anchor),
+                           clipPos(this, ranges[i].head || ranges[i].anchor)); }
+      if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex); }
+      setSelection(this, normalizeSelection(this.cm, out, primary), options);
+    }),
+    addSelection: docMethodOp(function(anchor, head, options) {
+      var ranges = this.sel.ranges.slice(0);
+      ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
+      setSelection(this, normalizeSelection(this.cm, ranges, ranges.length - 1), options);
+    }),
+
+    getSelection: function(lineSep) {
+      var ranges = this.sel.ranges, lines;
+      for (var i = 0; i < ranges.length; i++) {
+        var sel = getBetween(this, ranges[i].from(), ranges[i].to());
+        lines = lines ? lines.concat(sel) : sel;
+      }
+      if (lineSep === false) { return lines }
+      else { return lines.join(lineSep || this.lineSeparator()) }
+    },
+    getSelections: function(lineSep) {
+      var parts = [], ranges = this.sel.ranges;
+      for (var i = 0; i < ranges.length; i++) {
+        var sel = getBetween(this, ranges[i].from(), ranges[i].to());
+        if (lineSep !== false) { sel = sel.join(lineSep || this.lineSeparator()); }
+        parts[i] = sel;
+      }
+      return parts
+    },
+    replaceSelection: function(code, collapse, origin) {
+      var dup = [];
+      for (var i = 0; i < this.sel.ranges.length; i++)
+        { dup[i] = code; }
+      this.replaceSelections(dup, collapse, origin || "+input");
+    },
+    replaceSelections: docMethodOp(function(code, collapse, origin) {
+      var changes = [], sel = this.sel;
+      for (var i = 0; i < sel.ranges.length; i++) {
+        var range = sel.ranges[i];
+        changes[i] = {from: range.from(), to: range.to(), text: this.splitLines(code[i]), origin: origin};
+      }
+      var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
+      for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
+        { makeChange(this, changes[i$1]); }
+      if (newSel) { setSelectionReplaceHistory(this, newSel); }
+      else if (this.cm) { ensureCursorVisible(this.cm); }
+    }),
+    undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
+    redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
+    undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
+    redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),
+
+    setExtending: function(val) {this.extend = val;},
+    getExtending: function() {return this.extend},
+
+    historySize: function() {
+      var hist = this.history, done = 0, undone = 0;
+      for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done; } }
+      for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone; } }
+      return {undo: done, redo: undone}
+    },
+    clearHistory: function() {
+      var this$1 = this;
+
+      this.history = new History(this.history);
+      linkedDocs(this, function (doc) { return doc.history = this$1.history; }, true);
+    },
+
+    markClean: function() {
+      this.cleanGeneration = this.changeGeneration(true);
+    },
+    changeGeneration: function(forceSplit) {
+      if (forceSplit)
+        { this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null; }
+      return this.history.generation
+    },
+    isClean: function (gen) {
+      return this.history.generation == (gen || this.cleanGeneration)
+    },
+
+    getHistory: function() {
+      return {done: copyHistoryArray(this.history.done),
+              undone: copyHistoryArray(this.history.undone)}
+    },
+    setHistory: function(histData) {
+      var hist = this.history = new History(this.history);
+      hist.done = copyHistoryArray(histData.done.slice(0), null, true);
+      hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
+    },
+
+    setGutterMarker: docMethodOp(function(line, gutterID, value) {
+      return changeLine(this, line, "gutter", function (line) {
+        var markers = line.gutterMarkers || (line.gutterMarkers = {});
+        markers[gutterID] = value;
+        if (!value && isEmpty(markers)) { line.gutterMarkers = null; }
+        return true
+      })
+    }),
+
+    clearGutter: docMethodOp(function(gutterID) {
+      var this$1 = this;
+
+      this.iter(function (line) {
+        if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
+          changeLine(this$1, line, "gutter", function () {
+            line.gutterMarkers[gutterID] = null;
+            if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null; }
+            return true
+          });
+        }
+      });
+    }),
+
+    lineInfo: function(line) {
+      var n;
+      if (typeof line == "number") {
+        if (!isLine(this, line)) { return null }
+        n = line;
+        line = getLine(this, line);
+        if (!line) { return null }
+      } else {
+        n = lineNo(line);
+        if (n == null) { return null }
+      }
+      return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
+              textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
+              widgets: line.widgets}
+    },
+
+    addLineClass: docMethodOp(function(handle, where, cls) {
+      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+        var prop = where == "text" ? "textClass"
+                 : where == "background" ? "bgClass"
+                 : where == "gutter" ? "gutterClass" : "wrapClass";
+        if (!line[prop]) { line[prop] = cls; }
+        else if (classTest(cls).test(line[prop])) { return false }
+        else { line[prop] += " " + cls; }
+        return true
+      })
+    }),
+    removeLineClass: docMethodOp(function(handle, where, cls) {
+      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+        var prop = where == "text" ? "textClass"
+                 : where == "background" ? "bgClass"
+                 : where == "gutter" ? "gutterClass" : "wrapClass";
+        var cur = line[prop];
+        if (!cur) { return false }
+        else if (cls == null) { line[prop] = null; }
+        else {
+          var found = cur.match(classTest(cls));
+          if (!found) { return false }
+          var end = found.index + found[0].length;
+          line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
+        }
+        return true
+      })
+    }),
+
+    addLineWidget: docMethodOp(function(handle, node, options) {
+      return addLineWidget(this, handle, node, options)
+    }),
+    removeLineWidget: function(widget) { widget.clear(); },
+
+    markText: function(from, to, options) {
+      return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
+    },
+    setBookmark: function(pos, options) {
+      var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
+                      insertLeft: options && options.insertLeft,
+                      clearWhenEmpty: false, shared: options && options.shared,
+                      handleMouseEvents: options && options.handleMouseEvents};
+      pos = clipPos(this, pos);
+      return markText(this, pos, pos, realOpts, "bookmark")
+    },
+    findMarksAt: function(pos) {
+      pos = clipPos(this, pos);
+      var markers = [], spans = getLine(this, pos.line).markedSpans;
+      if (spans) { for (var i = 0; i < spans.length; ++i) {
+        var span = spans[i];
+        if ((span.from == null || span.from <= pos.ch) &&
+            (span.to == null || span.to >= pos.ch))
+          { markers.push(span.marker.parent || span.marker); }
+      } }
+      return markers
+    },
+    findMarks: function(from, to, filter) {
+      from = clipPos(this, from); to = clipPos(this, to);
+      var found = [], lineNo = from.line;
+      this.iter(from.line, to.line + 1, function (line) {
+        var spans = line.markedSpans;
+        if (spans) { for (var i = 0; i < spans.length; i++) {
+          var span = spans[i];
+          if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
+                span.from == null && lineNo != from.line ||
+                span.from != null && lineNo == to.line && span.from >= to.ch) &&
+              (!filter || filter(span.marker)))
+            { found.push(span.marker.parent || span.marker); }
+        } }
+        ++lineNo;
+      });
+      return found
+    },
+    getAllMarks: function() {
+      var markers = [];
+      this.iter(function (line) {
+        var sps = line.markedSpans;
+        if (sps) { for (var i = 0; i < sps.length; ++i)
+          { if (sps[i].from != null) { markers.push(sps[i].marker); } } }
+      });
+      return markers
+    },
+
+    posFromIndex: function(off) {
+      var ch, lineNo = this.first, sepSize = this.lineSeparator().length;
+      this.iter(function (line) {
+        var sz = line.text.length + sepSize;
+        if (sz > off) { ch = off; return true }
+        off -= sz;
+        ++lineNo;
+      });
+      return clipPos(this, Pos(lineNo, ch))
+    },
+    indexFromPos: function (coords) {
+      coords = clipPos(this, coords);
+      var index = coords.ch;
+      if (coords.line < this.first || coords.ch < 0) { return 0 }
+      var sepSize = this.lineSeparator().length;
+      this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
+        index += line.text.length + sepSize;
+      });
+      return index
+    },
+
+    copy: function(copyHistory) {
+      var doc = new Doc(getLines(this, this.first, this.first + this.size),
+                        this.modeOption, this.first, this.lineSep, this.direction);
+      doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
+      doc.sel = this.sel;
+      doc.extend = false;
+      if (copyHistory) {
+        doc.history.undoDepth = this.history.undoDepth;
+        doc.setHistory(this.getHistory());
+      }
+      return doc
+    },
+
+    linkedDoc: function(options) {
+      if (!options) { options = {}; }
+      var from = this.first, to = this.first + this.size;
+      if (options.from != null && options.from > from) { from = options.from; }
+      if (options.to != null && options.to < to) { to = options.to; }
+      var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction);
+      if (options.sharedHist) { copy.history = this.history
+      ; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
+      copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
+      copySharedMarkers(copy, findSharedMarkers(this));
+      return copy
+    },
+    unlinkDoc: function(other) {
+      if (other instanceof CodeMirror) { other = other.doc; }
+      if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
+        var link = this.linked[i];
+        if (link.doc != other) { continue }
+        this.linked.splice(i, 1);
+        other.unlinkDoc(this);
+        detachSharedMarkers(findSharedMarkers(this));
+        break
+      } }
+      // If the histories were shared, split them again
+      if (other.history == this.history) {
+        var splitIds = [other.id];
+        linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true);
+        other.history = new History(null);
+        other.history.done = copyHistoryArray(this.history.done, splitIds);
+        other.history.undone = copyHistoryArray(this.history.undone, splitIds);
+      }
+    },
+    iterLinkedDocs: function(f) {linkedDocs(this, f);},
+
+    getMode: function() {return this.mode},
+    getEditor: function() {return this.cm},
+
+    splitLines: function(str) {
+      if (this.lineSep) { return str.split(this.lineSep) }
+      return splitLinesAuto(str)
+    },
+    lineSeparator: function() { return this.lineSep || "\n" },
+
+    setDirection: docMethodOp(function (dir) {
+      if (dir != "rtl") { dir = "ltr"; }
+      if (dir == this.direction) { return }
+      this.direction = dir;
+      this.iter(function (line) { return line.order = null; });
+      if (this.cm) { directionChanged(this.cm); }
+    })
+  });
+
+  // Public alias.
+  Doc.prototype.eachLine = Doc.prototype.iter;
+
+  // Kludge to work around strange IE behavior where it'll sometimes
+  // re-fire a series of drag-related events right after the drop (#1551)
+  var lastDrop = 0;
+
+  function onDrop(e) {
+    var cm = this;
+    clearDragCursor(cm);
+    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
+      { return }
+    e_preventDefault(e);
+    if (ie) { lastDrop = +new Date; }
+    var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
+    if (!pos || cm.isReadOnly()) { return }
+    // Might be a file drop, in which case we simply extract the text
+    // and insert it.
+    if (files && files.length && window.FileReader && window.File) {
+      var n = files.length, text = Array(n), read = 0;
+      var markAsReadAndPasteIfAllFilesAreRead = function () {
+        if (++read == n) {
+          operation(cm, function () {
+            pos = clipPos(cm.doc, pos);
+            var change = {from: pos, to: pos,
+                          text: cm.doc.splitLines(
+                              text.filter(function (t) { return t != null; }).join(cm.doc.lineSeparator())),
+                          origin: "paste"};
+            makeChange(cm.doc, change);
+            setSelectionReplaceHistory(cm.doc, simpleSelection(clipPos(cm.doc, pos), clipPos(cm.doc, changeEnd(change))));
+          })();
+        }
+      };
+      var readTextFromFile = function (file, i) {
+        if (cm.options.allowDropFileTypes &&
+            indexOf(cm.options.allowDropFileTypes, file.type) == -1) {
+          markAsReadAndPasteIfAllFilesAreRead();
+          return
+        }
+        var reader = new FileReader;
+        reader.onerror = function () { return markAsReadAndPasteIfAllFilesAreRead(); };
+        reader.onload = function () {
+          var content = reader.result;
+          if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) {
+            markAsReadAndPasteIfAllFilesAreRead();
+            return
+          }
+          text[i] = content;
+          markAsReadAndPasteIfAllFilesAreRead();
+        };
+        reader.readAsText(file);
+      };
+      for (var i = 0; i < files.length; i++) { readTextFromFile(files[i], i); }
+    } else { // Normal drop
+      // Don't do a replace if the drop happened inside of the selected text.
+      if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
+        cm.state.draggingText(e);
+        // Ensure the editor is re-focused
+        setTimeout(function () { return cm.display.input.focus(); }, 20);
+        return
+      }
+      try {
+        var text$1 = e.dataTransfer.getData("Text");
+        if (text$1) {
+          var selected;
+          if (cm.state.draggingText && !cm.state.draggingText.copy)
+            { selected = cm.listSelections(); }
+          setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
+          if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
+            { replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag"); } }
+          cm.replaceSelection(text$1, "around", "paste");
+          cm.display.input.focus();
+        }
+      }
+      catch(e$1){}
+    }
+  }
+
+  function onDragStart(cm, e) {
+    if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
+    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }
+
+    e.dataTransfer.setData("Text", cm.getSelection());
+    e.dataTransfer.effectAllowed = "copyMove";
+
+    // Use dummy image instead of default browsers image.
+    // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
+    if (e.dataTransfer.setDragImage && !safari) {
+      var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
+      img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
+      if (presto) {
+        img.width = img.height = 1;
+        cm.display.wrapper.appendChild(img);
+        // Force a relayout, or Opera won't use our image for some obscure reason
+        img._top = img.offsetTop;
+      }
+      e.dataTransfer.setDragImage(img, 0, 0);
+      if (presto) { img.parentNode.removeChild(img); }
+    }
+  }
+
+  function onDragOver(cm, e) {
+    var pos = posFromMouse(cm, e);
+    if (!pos) { return }
+    var frag = document.createDocumentFragment();
+    drawSelectionCursor(cm, pos, frag);
+    if (!cm.display.dragCursor) {
+      cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
+      cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
+    }
+    removeChildrenAndAdd(cm.display.dragCursor, frag);
+  }
+
+  function clearDragCursor(cm) {
+    if (cm.display.dragCursor) {
+      cm.display.lineSpace.removeChild(cm.display.dragCursor);
+      cm.display.dragCursor = null;
+    }
+  }
+
+  // These must be handled carefully, because naively registering a
+  // handler for each editor will cause the editors to never be
+  // garbage collected.
+
+  function forEachCodeMirror(f) {
+    if (!document.getElementsByClassName) { return }
+    var byClass = document.getElementsByClassName("CodeMirror"), editors = [];
+    for (var i = 0; i < byClass.length; i++) {
+      var cm = byClass[i].CodeMirror;
+      if (cm) { editors.push(cm); }
+    }
+    if (editors.length) { editors[0].operation(function () {
+      for (var i = 0; i < editors.length; i++) { f(editors[i]); }
+    }); }
+  }
+
+  var globalsRegistered = false;
+  function ensureGlobalHandlers() {
+    if (globalsRegistered) { return }
+    registerGlobalHandlers();
+    globalsRegistered = true;
+  }
+  function registerGlobalHandlers() {
+    // When the window resizes, we need to refresh active editors.
+    var resizeTimer;
+    on(window, "resize", function () {
+      if (resizeTimer == null) { resizeTimer = setTimeout(function () {
+        resizeTimer = null;
+        forEachCodeMirror(onResize);
+      }, 100); }
+    });
+    // When the window loses focus, we want to show the editor as blurred
+    on(window, "blur", function () { return forEachCodeMirror(onBlur); });
+  }
+  // Called when the window resizes
+  function onResize(cm) {
+    var d = cm.display;
+    // Might be a text scaling operation, clear size caches.
+    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
+    d.scrollbarsClipped = false;
+    cm.setSize();
+  }
+
+  var keyNames = {
+    3: "Pause", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
+    19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
+    36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
+    46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
+    106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 145: "ScrollLock",
+    173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
+    221: "]", 222: "'", 224: "Mod", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+    63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
+  };
+
+  // Number keys
+  for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i); }
+  // Alphabetic keys
+  for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1); }
+  // Function keys
+  for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2; }
+
+  var keyMap = {};
+
+  keyMap.basic = {
+    "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
+    "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
+    "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
+    "Tab": "defaultTab", "Shift-Tab": "indentAuto",
+    "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
+    "Esc": "singleSelection"
+  };
+  // Note that the save and find-related commands aren't defined by
+  // default. User code or addons can define them. Unknown commands
+  // are simply ignored.
+  keyMap.pcDefault = {
+    "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
+    "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
+    "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
+    "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
+    "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
+    "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
+    "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
+    "fallthrough": "basic"
+  };
+  // Very basic readline/emacs-style bindings, which are standard on Mac.
+  keyMap.emacsy = {
+    "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
+    "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd", "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp",
+    "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine",
+    "Ctrl-T": "transposeChars", "Ctrl-O": "openLine"
+  };
+  keyMap.macDefault = {
+    "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
+    "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
+    "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
+    "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
+    "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
+    "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
+    "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
+    "fallthrough": ["basic", "emacsy"]
+  };
+  keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
+
+  // KEYMAP DISPATCH
+
+  function normalizeKeyName(name) {
+    var parts = name.split(/-(?!$)/);
+    name = parts[parts.length - 1];
+    var alt, ctrl, shift, cmd;
+    for (var i = 0; i < parts.length - 1; i++) {
+      var mod = parts[i];
+      if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true; }
+      else if (/^a(lt)?$/i.test(mod)) { alt = true; }
+      else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true; }
+      else if (/^s(hift)?$/i.test(mod)) { shift = true; }
+      else { throw new Error("Unrecognized modifier name: " + mod) }
+    }
+    if (alt) { name = "Alt-" + name; }
+    if (ctrl) { name = "Ctrl-" + name; }
+    if (cmd) { name = "Cmd-" + name; }
+    if (shift) { name = "Shift-" + name; }
+    return name
+  }
+
+  // This is a kludge to keep keymaps mostly working as raw objects
+  // (backwards compatibility) while at the same time support features
+  // like normalization and multi-stroke key bindings. It compiles a
+  // new normalized keymap, and then updates the old object to reflect
+  // this.
+  function normalizeKeyMap(keymap) {
+    var copy = {};
+    for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
+      var value = keymap[keyname];
+      if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
+      if (value == "...") { delete keymap[keyname]; continue }
+
+      var keys = map(keyname.split(" "), normalizeKeyName);
+      for (var i = 0; i < keys.length; i++) {
+        var val = (void 0), name = (void 0);
+        if (i == keys.length - 1) {
+          name = keys.join(" ");
+          val = value;
+        } else {
+          name = keys.slice(0, i + 1).join(" ");
+          val = "...";
+        }
+        var prev = copy[name];
+        if (!prev) { copy[name] = val; }
+        else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
+      }
+      delete keymap[keyname];
+    } }
+    for (var prop in copy) { keymap[prop] = copy[prop]; }
+    return keymap
+  }
+
+  function lookupKey(key, map, handle, context) {
+    map = getKeyMap(map);
+    var found = map.call ? map.call(key, context) : map[key];
+    if (found === false) { return "nothing" }
+    if (found === "...") { return "multi" }
+    if (found != null && handle(found)) { return "handled" }
+
+    if (map.fallthrough) {
+      if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
+        { return lookupKey(key, map.fallthrough, handle, context) }
+      for (var i = 0; i < map.fallthrough.length; i++) {
+        var result = lookupKey(key, map.fallthrough[i], handle, context);
+        if (result) { return result }
+      }
+    }
+  }
+
+  // Modifier key presses don't count as 'real' key presses for the
+  // purpose of keymap fallthrough.
+  function isModifierKey(value) {
+    var name = typeof value == "string" ? value : keyNames[value.keyCode];
+    return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
+  }
+
+  function addModifierNames(name, event, noShift) {
+    var base = name;
+    if (event.altKey && base != "Alt") { name = "Alt-" + name; }
+    if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name; }
+    if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Mod") { name = "Cmd-" + name; }
+    if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name; }
+    return name
+  }
+
+  // Look up the name of a key as indicated by an event object.
+  function keyName(event, noShift) {
+    if (presto && event.keyCode == 34 && event["char"]) { return false }
+    var name = keyNames[event.keyCode];
+    if (name == null || event.altGraphKey) { return false }
+    // Ctrl-ScrollLock has keyCode 3, same as Ctrl-Pause,
+    // so we'll use event.code when available (Chrome 48+, FF 38+, Safari 10.1+)
+    if (event.keyCode == 3 && event.code) { name = event.code; }
+    return addModifierNames(name, event, noShift)
+  }
+
+  function getKeyMap(val) {
+    return typeof val == "string" ? keyMap[val] : val
+  }
+
+  // Helper for deleting text near the selection(s), used to implement
+  // backspace, delete, and similar functionality.
+  function deleteNearSelection(cm, compute) {
+    var ranges = cm.doc.sel.ranges, kill = [];
+    // Build up a set of ranges to kill first, merging overlapping
+    // ranges.
+    for (var i = 0; i < ranges.length; i++) {
+      var toKill = compute(ranges[i]);
+      while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
+        var replaced = kill.pop();
+        if (cmp(replaced.from, toKill.from) < 0) {
+          toKill.from = replaced.from;
+          break
+        }
+      }
+      kill.push(toKill);
+    }
+    // Next, remove those actual ranges.
+    runInOp(cm, function () {
+      for (var i = kill.length - 1; i >= 0; i--)
+        { replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete"); }
+      ensureCursorVisible(cm);
+    });
+  }
+
+  function moveCharLogically(line, ch, dir) {
+    var target = skipExtendingChars(line.text, ch + dir, dir);
+    return target < 0 || target > line.text.length ? null : target
+  }
+
+  function moveLogically(line, start, dir) {
+    var ch = moveCharLogically(line, start.ch, dir);
+    return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
+  }
+
+  function endOfLine(visually, cm, lineObj, lineNo, dir) {
+    if (visually) {
+      if (cm.doc.direction == "rtl") { dir = -dir; }
+      var order = getOrder(lineObj, cm.doc.direction);
+      if (order) {
+        var part = dir < 0 ? lst(order) : order[0];
+        var moveInStorageOrder = (dir < 0) == (part.level == 1);
+        var sticky = moveInStorageOrder ? "after" : "before";
+        var ch;
+        // With a wrapped rtl chunk (possibly spanning multiple bidi parts),
+        // it could be that the last bidi part is not on the last visual line,
+        // since visual lines contain content order-consecutive chunks.
+        // Thus, in rtl, we are looking for the first (content-order) character
+        // in the rtl chunk that is on the last line (that is, the same line
+        // as the last (content-order) character).
+        if (part.level > 0 || cm.doc.direction == "rtl") {
+          var prep = prepareMeasureForLine(cm, lineObj);
+          ch = dir < 0 ? lineObj.text.length - 1 : 0;
+          var targetTop = measureCharPrepared(cm, prep, ch).top;
+          ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch);
+          if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1); }
+        } else { ch = dir < 0 ? part.to : part.from; }
+        return new Pos(lineNo, ch, sticky)
+      }
+    }
+    return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
+  }
+
+  function moveVisually(cm, line, start, dir) {
+    var bidi = getOrder(line, cm.doc.direction);
+    if (!bidi) { return moveLogically(line, start, dir) }
+    if (start.ch >= line.text.length) {
+      start.ch = line.text.length;
+      start.sticky = "before";
+    } else if (start.ch <= 0) {
+      start.ch = 0;
+      start.sticky = "after";
+    }
+    var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos];
+    if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
+      // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
+      // nothing interesting happens.
+      return moveLogically(line, start, dir)
+    }
+
+    var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); };
+    var prep;
+    var getWrappedLineExtent = function (ch) {
+      if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
+      prep = prep || prepareMeasureForLine(cm, line);
+      return wrappedLineExtentChar(cm, line, prep, ch)
+    };
+    var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch);
+
+    if (cm.doc.direction == "rtl" || part.level == 1) {
+      var moveInStorageOrder = (part.level == 1) == (dir < 0);
+      var ch = mv(start, moveInStorageOrder ? 1 : -1);
+      if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
+        // Case 2: We move within an rtl part or in an rtl editor on the same visual line
+        var sticky = moveInStorageOrder ? "before" : "after";
+        return new Pos(start.line, ch, sticky)
+      }
+    }
+
+    // Case 3: Could not move within this bidi part in this visual line, so leave
+    // the current bidi part
+
+    var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
+      var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
+        ? new Pos(start.line, mv(ch, 1), "before")
+        : new Pos(start.line, ch, "after"); };
+
+      for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
+        var part = bidi[partPos];
+        var moveInStorageOrder = (dir > 0) == (part.level != 1);
+        var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1);
+        if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
+        ch = moveInStorageOrder ? part.from : mv(part.to, -1);
+        if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }
+      }
+    };
+
+    // Case 3a: Look for other bidi parts on the same visual line
+    var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent);
+    if (res) { return res }
+
+    // Case 3b: Look for other bidi parts on the next visual line
+    var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1);
+    if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
+      res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh));
+      if (res) { return res }
+    }
+
+    // Case 4: Nowhere to move
+    return null
+  }
+
+  // Commands are parameter-less actions that can be performed on an
+  // editor, mostly used for keybindings.
+  var commands = {
+    selectAll: selectAll,
+    singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
+    killLine: function (cm) { return deleteNearSelection(cm, function (range) {
+      if (range.empty()) {
+        var len = getLine(cm.doc, range.head.line).text.length;
+        if (range.head.ch == len && range.head.line < cm.lastLine())
+          { return {from: range.head, to: Pos(range.head.line + 1, 0)} }
+        else
+          { return {from: range.head, to: Pos(range.head.line, len)} }
+      } else {
+        return {from: range.from(), to: range.to()}
+      }
+    }); },
+    deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+      from: Pos(range.from().line, 0),
+      to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
+    }); }); },
+    delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+      from: Pos(range.from().line, 0), to: range.from()
+    }); }); },
+    delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
+      var top = cm.charCoords(range.head, "div").top + 5;
+      var leftPos = cm.coordsChar({left: 0, top: top}, "div");
+      return {from: leftPos, to: range.from()}
+    }); },
+    delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
+      var top = cm.charCoords(range.head, "div").top + 5;
+      var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
+      return {from: range.from(), to: rightPos }
+    }); },
+    undo: function (cm) { return cm.undo(); },
+    redo: function (cm) { return cm.redo(); },
+    undoSelection: function (cm) { return cm.undoSelection(); },
+    redoSelection: function (cm) { return cm.redoSelection(); },
+    goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
+    goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
+    goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
+      {origin: "+move", bias: 1}
+    ); },
+    goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
+      {origin: "+move", bias: 1}
+    ); },
+    goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
+      {origin: "+move", bias: -1}
+    ); },
+    goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
+      var top = cm.cursorCoords(range.head, "div").top + 5;
+      return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
+    }, sel_move); },
+    goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
+      var top = cm.cursorCoords(range.head, "div").top + 5;
+      return cm.coordsChar({left: 0, top: top}, "div")
+    }, sel_move); },
+    goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
+      var top = cm.cursorCoords(range.head, "div").top + 5;
+      var pos = cm.coordsChar({left: 0, top: top}, "div");
+      if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
+      return pos
+    }, sel_move); },
+    goLineUp: function (cm) { return cm.moveV(-1, "line"); },
+    goLineDown: function (cm) { return cm.moveV(1, "line"); },
+    goPageUp: function (cm) { return cm.moveV(-1, "page"); },
+    goPageDown: function (cm) { return cm.moveV(1, "page"); },
+    goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
+    goCharRight: function (cm) { return cm.moveH(1, "char"); },
+    goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
+    goColumnRight: function (cm) { return cm.moveH(1, "column"); },
+    goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
+    goGroupRight: function (cm) { return cm.moveH(1, "group"); },
+    goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
+    goWordRight: function (cm) { return cm.moveH(1, "word"); },
+    delCharBefore: function (cm) { return cm.deleteH(-1, "codepoint"); },
+    delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
+    delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
+    delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
+    delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
+    delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
+    indentAuto: function (cm) { return cm.indentSelection("smart"); },
+    indentMore: function (cm) { return cm.indentSelection("add"); },
+    indentLess: function (cm) { return cm.indentSelection("subtract"); },
+    insertTab: function (cm) { return cm.replaceSelection("\t"); },
+    insertSoftTab: function (cm) {
+      var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize;
+      for (var i = 0; i < ranges.length; i++) {
+        var pos = ranges[i].from();
+        var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
+        spaces.push(spaceStr(tabSize - col % tabSize));
+      }
+      cm.replaceSelections(spaces);
+    },
+    defaultTab: function (cm) {
+      if (cm.somethingSelected()) { cm.indentSelection("add"); }
+      else { cm.execCommand("insertTab"); }
+    },
+    // Swap the two chars left and right of each selection's head.
+    // Move cursor behind the two swapped characters afterwards.
+    //
+    // Doesn't consider line feeds a character.
+    // Doesn't scan more than one line above to find a character.
+    // Doesn't do anything on an empty line.
+    // Doesn't do anything with non-empty selections.
+    transposeChars: function (cm) { return runInOp(cm, function () {
+      var ranges = cm.listSelections(), newSel = [];
+      for (var i = 0; i < ranges.length; i++) {
+        if (!ranges[i].empty()) { continue }
+        var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
+        if (line) {
+          if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1); }
+          if (cur.ch > 0) {
+            cur = new Pos(cur.line, cur.ch + 1);
+            cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
+                            Pos(cur.line, cur.ch - 2), cur, "+transpose");
+          } else if (cur.line > cm.doc.first) {
+            var prev = getLine(cm.doc, cur.line - 1).text;
+            if (prev) {
+              cur = new Pos(cur.line, 1);
+              cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
+                              prev.charAt(prev.length - 1),
+                              Pos(cur.line - 1, prev.length - 1), cur, "+transpose");
+            }
+          }
+        }
+        newSel.push(new Range(cur, cur));
+      }
+      cm.setSelections(newSel);
+    }); },
+    newlineAndIndent: function (cm) { return runInOp(cm, function () {
+      var sels = cm.listSelections();
+      for (var i = sels.length - 1; i >= 0; i--)
+        { cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input"); }
+      sels = cm.listSelections();
+      for (var i$1 = 0; i$1 < sels.length; i$1++)
+        { cm.indentLine(sels[i$1].from().line, null, true); }
+      ensureCursorVisible(cm);
+    }); },
+    openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
+    toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }
+  };
+
+
+  function lineStart(cm, lineN) {
+    var line = getLine(cm.doc, lineN);
+    var visual = visualLine(line);
+    if (visual != line) { lineN = lineNo(visual); }
+    return endOfLine(true, cm, visual, lineN, 1)
+  }
+  function lineEnd(cm, lineN) {
+    var line = getLine(cm.doc, lineN);
+    var visual = visualLineEnd(line);
+    if (visual != line) { lineN = lineNo(visual); }
+    return endOfLine(true, cm, line, lineN, -1)
+  }
+  function lineStartSmart(cm, pos) {
+    var start = lineStart(cm, pos.line);
+    var line = getLine(cm.doc, start.line);
+    var order = getOrder(line, cm.doc.direction);
+    if (!order || order[0].level == 0) {
+      var firstNonWS = Math.max(start.ch, line.text.search(/\S/));
+      var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch;
+      return Pos(start.line, inWS ? 0 : firstNonWS, start.sticky)
+    }
+    return start
+  }
+
+  // Run a handler that was bound to a key.
+  function doHandleBinding(cm, bound, dropShift) {
+    if (typeof bound == "string") {
+      bound = commands[bound];
+      if (!bound) { return false }
+    }
+    // Ensure previous input has been read, so that the handler sees a
+    // consistent view of the document
+    cm.display.input.ensurePolled();
+    var prevShift = cm.display.shift, done = false;
+    try {
+      if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
+      if (dropShift) { cm.display.shift = false; }
+      done = bound(cm) != Pass;
+    } finally {
+      cm.display.shift = prevShift;
+      cm.state.suppressEdits = false;
+    }
+    return done
+  }
+
+  function lookupKeyForEditor(cm, name, handle) {
+    for (var i = 0; i < cm.state.keyMaps.length; i++) {
+      var result = lookupKey(name, cm.state.keyMaps[i], handle, cm);
+      if (result) { return result }
+    }
+    return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
+      || lookupKey(name, cm.options.keyMap, handle, cm)
+  }
+
+  // Note that, despite the name, this function is also used to check
+  // for bound mouse clicks.
+
+  var stopSeq = new Delayed;
+
+  function dispatchKey(cm, name, e, handle) {
+    var seq = cm.state.keySeq;
+    if (seq) {
+      if (isModifierKey(name)) { return "handled" }
+      if (/\'$/.test(name))
+        { cm.state.keySeq = null; }
+      else
+        { stopSeq.set(50, function () {
+          if (cm.state.keySeq == seq) {
+            cm.state.keySeq = null;
+            cm.display.input.reset();
+          }
+        }); }
+      if (dispatchKeyInner(cm, seq + " " + name, e, handle)) { return true }
+    }
+    return dispatchKeyInner(cm, name, e, handle)
+  }
+
+  function dispatchKeyInner(cm, name, e, handle) {
+    var result = lookupKeyForEditor(cm, name, handle);
+
+    if (result == "multi")
+      { cm.state.keySeq = name; }
+    if (result == "handled")
+      { signalLater(cm, "keyHandled", cm, name, e); }
+
+    if (result == "handled" || result == "multi") {
+      e_preventDefault(e);
+      restartBlink(cm);
+    }
+
+    return !!result
+  }
+
+  // Handle a key from the keydown event.
+  function handleKeyBinding(cm, e) {
+    var name = keyName(e, true);
+    if (!name) { return false }
+
+    if (e.shiftKey && !cm.state.keySeq) {
+      // First try to resolve full name (including 'Shift-'). Failing
+      // that, see if there is a cursor-motion command (starting with
+      // 'go') bound to the keyname without 'Shift-'.
+      return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
+          || dispatchKey(cm, name, e, function (b) {
+               if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
+                 { return doHandleBinding(cm, b) }
+             })
+    } else {
+      return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })
+    }
+  }
+
+  // Handle a key from the keypress event
+  function handleCharBinding(cm, e, ch) {
+    return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })
+  }
+
+  var lastStoppedKey = null;
+  function onKeyDown(e) {
+    var cm = this;
+    if (e.target && e.target != cm.display.input.getField()) { return }
+    cm.curOp.focus = activeElt();
+    if (signalDOMEvent(cm, e)) { return }
+    // IE does strange things with escape.
+    if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false; }
+    var code = e.keyCode;
+    cm.display.shift = code == 16 || e.shiftKey;
+    var handled = handleKeyBinding(cm, e);
+    if (presto) {
+      lastStoppedKey = handled ? code : null;
+      // Opera has no cut event... we try to at least catch the key combo
+      if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
+        { cm.replaceSelection("", null, "cut"); }
+    }
+    if (gecko && !mac && !handled && code == 46 && e.shiftKey && !e.ctrlKey && document.execCommand)
+      { document.execCommand("cut"); }
+
+    // Turn mouse into crosshair when Alt is held on Mac.
+    if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
+      { showCrossHair(cm); }
+  }
+
+  function showCrossHair(cm) {
+    var lineDiv = cm.display.lineDiv;
+    addClass(lineDiv, "CodeMirror-crosshair");
+
+    function up(e) {
+      if (e.keyCode == 18 || !e.altKey) {
+        rmClass(lineDiv, "CodeMirror-crosshair");
+        off(document, "keyup", up);
+        off(document, "mouseover", up);
+      }
+    }
+    on(document, "keyup", up);
+    on(document, "mouseover", up);
+  }
+
+  function onKeyUp(e) {
+    if (e.keyCode == 16) { this.doc.sel.shift = false; }
+    signalDOMEvent(this, e);
+  }
+
+  function onKeyPress(e) {
+    var cm = this;
+    if (e.target && e.target != cm.display.input.getField()) { return }
+    if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
+    var keyCode = e.keyCode, charCode = e.charCode;
+    if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
+    if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
+    var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
+    // Some browsers fire keypress events for backspace
+    if (ch == "\x08") { return }
+    if (handleCharBinding(cm, e, ch)) { return }
+    cm.display.input.onKeyPress(e);
+  }
+
+  var DOUBLECLICK_DELAY = 400;
+
+  var PastClick = function(time, pos, button) {
+    this.time = time;
+    this.pos = pos;
+    this.button = button;
+  };
+
+  PastClick.prototype.compare = function (time, pos, button) {
+    return this.time + DOUBLECLICK_DELAY > time &&
+      cmp(pos, this.pos) == 0 && button == this.button
+  };
+
+  var lastClick, lastDoubleClick;
+  function clickRepeat(pos, button) {
+    var now = +new Date;
+    if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
+      lastClick = lastDoubleClick = null;
+      return "triple"
+    } else if (lastClick && lastClick.compare(now, pos, button)) {
+      lastDoubleClick = new PastClick(now, pos, button);
+      lastClick = null;
+      return "double"
+    } else {
+      lastClick = new PastClick(now, pos, button);
+      lastDoubleClick = null;
+      return "single"
+    }
+  }
+
+  // A mouse down can be a single click, double click, triple click,
+  // start of selection drag, start of text drag, new cursor
+  // (ctrl-click), rectangle drag (alt-drag), or xwin
+  // middle-click-paste. Or it might be a click on something we should
+  // not interfere with, such as a scrollbar or widget.
+  function onMouseDown(e) {
+    var cm = this, display = cm.display;
+    if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
+    display.input.ensurePolled();
+    display.shift = e.shiftKey;
+
+    if (eventInWidget(display, e)) {
+      if (!webkit) {
+        // Briefly turn off draggability, to allow widgets to do
+        // normal dragging things.
+        display.scroller.draggable = false;
+        setTimeout(function () { return display.scroller.draggable = true; }, 100);
+      }
+      return
+    }
+    if (clickInGutter(cm, e)) { return }
+    var pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single";
+    window.focus();
+
+    // #3261: make sure, that we're not starting a second selection
+    if (button == 1 && cm.state.selectingText)
+      { cm.state.selectingText(e); }
+
+    if (pos && handleMappedButton(cm, button, pos, repeat, e)) { return }
+
+    if (button == 1) {
+      if (pos) { leftButtonDown(cm, pos, repeat, e); }
+      else if (e_target(e) == display.scroller) { e_preventDefault(e); }
+    } else if (button == 2) {
+      if (pos) { extendSelection(cm.doc, pos); }
+      setTimeout(function () { return display.input.focus(); }, 20);
+    } else if (button == 3) {
+      if (captureRightClick) { cm.display.input.onContextMenu(e); }
+      else { delayBlurEvent(cm); }
+    }
+  }
+
+  function handleMappedButton(cm, button, pos, repeat, event) {
+    var name = "Click";
+    if (repeat == "double") { name = "Double" + name; }
+    else if (repeat == "triple") { name = "Triple" + name; }
+    name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name;
+
+    return dispatchKey(cm,  addModifierNames(name, event), event, function (bound) {
+      if (typeof bound == "string") { bound = commands[bound]; }
+      if (!bound) { return false }
+      var done = false;
+      try {
+        if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
+        done = bound(cm, pos) != Pass;
+      } finally {
+        cm.state.suppressEdits = false;
+      }
+      return done
+    })
+  }
+
+  function configureMouse(cm, repeat, event) {
+    var option = cm.getOption("configureMouse");
+    var value = option ? option(cm, repeat, event) : {};
+    if (value.unit == null) {
+      var rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey;
+      value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line";
+    }
+    if (value.extend == null || cm.doc.extend) { value.extend = cm.doc.extend || event.shiftKey; }
+    if (value.addNew == null) { value.addNew = mac ? event.metaKey : event.ctrlKey; }
+    if (value.moveOnDrag == null) { value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey); }
+    return value
+  }
+
+  function leftButtonDown(cm, pos, repeat, event) {
+    if (ie) { setTimeout(bind(ensureFocus, cm), 0); }
+    else { cm.curOp.focus = activeElt(); }
+
+    var behavior = configureMouse(cm, repeat, event);
+
+    var sel = cm.doc.sel, contained;
+    if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
+        repeat == "single" && (contained = sel.contains(pos)) > -1 &&
+        (cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
+        (cmp(contained.to(), pos) > 0 || pos.xRel < 0))
+      { leftButtonStartDrag(cm, event, pos, behavior); }
+    else
+      { leftButtonSelect(cm, event, pos, behavior); }
+  }
+
+  // Start a text drag. When it ends, see if any dragging actually
+  // happen, and treat as a click if it didn't.
+  function leftButtonStartDrag(cm, event, pos, behavior) {
+    var display = cm.display, moved = false;
+    var dragEnd = operation(cm, function (e) {
+      if (webkit) { display.scroller.draggable = false; }
+      cm.state.draggingText = false;
+      if (cm.state.delayingBlurEvent) {
+        if (cm.hasFocus()) { cm.state.delayingBlurEvent = false; }
+        else { delayBlurEvent(cm); }
+      }
+      off(display.wrapper.ownerDocument, "mouseup", dragEnd);
+      off(display.wrapper.ownerDocument, "mousemove", mouseMove);
+      off(display.scroller, "dragstart", dragStart);
+      off(display.scroller, "drop", dragEnd);
+      if (!moved) {
+        e_preventDefault(e);
+        if (!behavior.addNew)
+          { extendSelection(cm.doc, pos, null, null, behavior.extend); }
+        // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
+        if ((webkit && !safari) || ie && ie_version == 9)
+          { setTimeout(function () {display.wrapper.ownerDocument.body.focus({preventScroll: true}); display.input.focus();}, 20); }
+        else
+          { display.input.focus(); }
+      }
+    });
+    var mouseMove = function(e2) {
+      moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10;
+    };
+    var dragStart = function () { return moved = true; };
+    // Let the drag handler handle this.
+    if (webkit) { display.scroller.draggable = true; }
+    cm.state.draggingText = dragEnd;
+    dragEnd.copy = !behavior.moveOnDrag;
+    on(display.wrapper.ownerDocument, "mouseup", dragEnd);
+    on(display.wrapper.ownerDocument, "mousemove", mouseMove);
+    on(display.scroller, "dragstart", dragStart);
+    on(display.scroller, "drop", dragEnd);
+
+    cm.state.delayingBlurEvent = true;
+    setTimeout(function () { return display.input.focus(); }, 20);
+    // IE's approach to draggable
+    if (display.scroller.dragDrop) { display.scroller.dragDrop(); }
+  }
+
+  function rangeForUnit(cm, pos, unit) {
+    if (unit == "char") { return new Range(pos, pos) }
+    if (unit == "word") { return cm.findWordAt(pos) }
+    if (unit == "line") { return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
+    var result = unit(cm, pos);
+    return new Range(result.from, result.to)
+  }
+
+  // Normal selection, as opposed to text dragging.
+  function leftButtonSelect(cm, event, start, behavior) {
+    if (ie) { delayBlurEvent(cm); }
+    var display = cm.display, doc = cm.doc;
+    e_preventDefault(event);
+
+    var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges;
+    if (behavior.addNew && !behavior.extend) {
+      ourIndex = doc.sel.contains(start);
+      if (ourIndex > -1)
+        { ourRange = ranges[ourIndex]; }
+      else
+        { ourRange = new Range(start, start); }
+    } else {
+      ourRange = doc.sel.primary();
+      ourIndex = doc.sel.primIndex;
+    }
+
+    if (behavior.unit == "rectangle") {
+      if (!behavior.addNew) { ourRange = new Range(start, start); }
+      start = posFromMouse(cm, event, true, true);
+      ourIndex = -1;
+    } else {
+      var range = rangeForUnit(cm, start, behavior.unit);
+      if (behavior.extend)
+        { ourRange = extendRange(ourRange, range.anchor, range.head, behavior.extend); }
+      else
+        { ourRange = range; }
+    }
+
+    if (!behavior.addNew) {
+      ourIndex = 0;
+      setSelection(doc, new Selection([ourRange], 0), sel_mouse);
+      startSel = doc.sel;
+    } else if (ourIndex == -1) {
+      ourIndex = ranges.length;
+      setSelection(doc, normalizeSelection(cm, ranges.concat([ourRange]), ourIndex),
+                   {scroll: false, origin: "*mouse"});
+    } else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
+      setSelection(doc, normalizeSelection(cm, ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
+                   {scroll: false, origin: "*mouse"});
+      startSel = doc.sel;
+    } else {
+      replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
+    }
+
+    var lastPos = start;
+    function extendTo(pos) {
+      if (cmp(lastPos, pos) == 0) { return }
+      lastPos = pos;
+
+      if (behavior.unit == "rectangle") {
+        var ranges = [], tabSize = cm.options.tabSize;
+        var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize);
+        var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize);
+        var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol);
+        for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
+             line <= end; line++) {
+          var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize);
+          if (left == right)
+            { ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))); }
+          else if (text.length > leftPos)
+            { ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))); }
+        }
+        if (!ranges.length) { ranges.push(new Range(start, start)); }
+        setSelection(doc, normalizeSelection(cm, startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
+                     {origin: "*mouse", scroll: false});
+        cm.scrollIntoView(pos);
+      } else {
+        var oldRange = ourRange;
+        var range = rangeForUnit(cm, pos, behavior.unit);
+        var anchor = oldRange.anchor, head;
+        if (cmp(range.anchor, anchor) > 0) {
+          head = range.head;
+          anchor = minPos(oldRange.from(), range.anchor);
+        } else {
+          head = range.anchor;
+          anchor = maxPos(oldRange.to(), range.head);
+        }
+        var ranges$1 = startSel.ranges.slice(0);
+        ranges$1[ourIndex] = bidiSimplify(cm, new Range(clipPos(doc, anchor), head));
+        setSelection(doc, normalizeSelection(cm, ranges$1, ourIndex), sel_mouse);
+      }
+    }
+
+    var editorSize = display.wrapper.getBoundingClientRect();
+    // Used to ensure timeout re-tries don't fire when another extend
+    // happened in the meantime (clearTimeout isn't reliable -- at
+    // least on Chrome, the timeouts still happen even when cleared,
+    // if the clear happens after their scheduled firing time).
+    var counter = 0;
+
+    function extend(e) {
+      var curCount = ++counter;
+      var cur = posFromMouse(cm, e, true, behavior.unit == "rectangle");
+      if (!cur) { return }
+      if (cmp(cur, lastPos) != 0) {
+        cm.curOp.focus = activeElt();
+        extendTo(cur);
+        var visible = visibleLines(display, doc);
+        if (cur.line >= visible.to || cur.line < visible.from)
+          { setTimeout(operation(cm, function () {if (counter == curCount) { extend(e); }}), 150); }
+      } else {
+        var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
+        if (outside) { setTimeout(operation(cm, function () {
+          if (counter != curCount) { return }
+          display.scroller.scrollTop += outside;
+          extend(e);
+        }), 50); }
+      }
+    }
+
+    function done(e) {
+      cm.state.selectingText = false;
+      counter = Infinity;
+      // If e is null or undefined we interpret this as someone trying
+      // to explicitly cancel the selection rather than the user
+      // letting go of the mouse button.
+      if (e) {
+        e_preventDefault(e);
+        display.input.focus();
+      }
+      off(display.wrapper.ownerDocument, "mousemove", move);
+      off(display.wrapper.ownerDocument, "mouseup", up);
+      doc.history.lastSelOrigin = null;
+    }
+
+    var move = operation(cm, function (e) {
+      if (e.buttons === 0 || !e_button(e)) { done(e); }
+      else { extend(e); }
+    });
+    var up = operation(cm, done);
+    cm.state.selectingText = up;
+    on(display.wrapper.ownerDocument, "mousemove", move);
+    on(display.wrapper.ownerDocument, "mouseup", up);
+  }
+
+  // Used when mouse-selecting to adjust the anchor to the proper side
+  // of a bidi jump depending on the visual position of the head.
+  function bidiSimplify(cm, range) {
+    var anchor = range.anchor;
+    var head = range.head;
+    var anchorLine = getLine(cm.doc, anchor.line);
+    if (cmp(anchor, head) == 0 && anchor.sticky == head.sticky) { return range }
+    var order = getOrder(anchorLine);
+    if (!order) { return range }
+    var index = getBidiPartAt(order, anchor.ch, anchor.sticky), part = order[index];
+    if (part.from != anchor.ch && part.to != anchor.ch) { return range }
+    var boundary = index + ((part.from == anchor.ch) == (part.level != 1) ? 0 : 1);
+    if (boundary == 0 || boundary == order.length) { return range }
+
+    // Compute the relative visual position of the head compared to the
+    // anchor (<0 is to the left, >0 to the right)
+    var leftSide;
+    if (head.line != anchor.line) {
+      leftSide = (head.line - anchor.line) * (cm.doc.direction == "ltr" ? 1 : -1) > 0;
+    } else {
+      var headIndex = getBidiPartAt(order, head.ch, head.sticky);
+      var dir = headIndex - index || (head.ch - anchor.ch) * (part.level == 1 ? -1 : 1);
+      if (headIndex == boundary - 1 || headIndex == boundary)
+        { leftSide = dir < 0; }
+      else
+        { leftSide = dir > 0; }
+    }
+
+    var usePart = order[boundary + (leftSide ? -1 : 0)];
+    var from = leftSide == (usePart.level == 1);
+    var ch = from ? usePart.from : usePart.to, sticky = from ? "after" : "before";
+    return anchor.ch == ch && anchor.sticky == sticky ? range : new Range(new Pos(anchor.line, ch, sticky), head)
+  }
+
+
+  // Determines whether an event happened in the gutter, and fires the
+  // handlers for the corresponding event.
+  function gutterEvent(cm, e, type, prevent) {
+    var mX, mY;
+    if (e.touches) {
+      mX = e.touches[0].clientX;
+      mY = e.touches[0].clientY;
+    } else {
+      try { mX = e.clientX; mY = e.clientY; }
+      catch(e$1) { return false }
+    }
+    if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
+    if (prevent) { e_preventDefault(e); }
+
+    var display = cm.display;
+    var lineBox = display.lineDiv.getBoundingClientRect();
+
+    if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
+    mY -= lineBox.top - display.viewOffset;
+
+    for (var i = 0; i < cm.display.gutterSpecs.length; ++i) {
+      var g = display.gutters.childNodes[i];
+      if (g && g.getBoundingClientRect().right >= mX) {
+        var line = lineAtHeight(cm.doc, mY);
+        var gutter = cm.display.gutterSpecs[i];
+        signal(cm, type, cm, line, gutter.className, e);
+        return e_defaultPrevented(e)
+      }
+    }
+  }
+
+  function clickInGutter(cm, e) {
+    return gutterEvent(cm, e, "gutterClick", true)
+  }
+
+  // CONTEXT MENU HANDLING
+
+  // To make the context menu work, we need to briefly unhide the
+  // textarea (making it as unobtrusive as possible) to let the
+  // right-click take effect on it.
+  function onContextMenu(cm, e) {
+    if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
+    if (signalDOMEvent(cm, e, "contextmenu")) { return }
+    if (!captureRightClick) { cm.display.input.onContextMenu(e); }
+  }
+
+  function contextMenuInGutter(cm, e) {
+    if (!hasHandler(cm, "gutterContextMenu")) { return false }
+    return gutterEvent(cm, e, "gutterContextMenu", false)
+  }
+
+  function themeChanged(cm) {
+    cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
+      cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
+    clearCaches(cm);
+  }
+
+  var Init = {toString: function(){return "CodeMirror.Init"}};
+
+  var defaults = {};
+  var optionHandlers = {};
+
+  function defineOptions(CodeMirror) {
+    var optionHandlers = CodeMirror.optionHandlers;
+
+    function option(name, deflt, handle, notOnInit) {
+      CodeMirror.defaults[name] = deflt;
+      if (handle) { optionHandlers[name] =
+        notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old); }} : handle; }
+    }
+
+    CodeMirror.defineOption = option;
+
+    // Passed to option handlers when there is no old value.
+    CodeMirror.Init = Init;
+
+    // These two are, on init, called from the constructor because they
+    // have to be initialized before the editor can start at all.
+    option("value", "", function (cm, val) { return cm.setValue(val); }, true);
+    option("mode", null, function (cm, val) {
+      cm.doc.modeOption = val;
+      loadMode(cm);
+    }, true);
+
+    option("indentUnit", 2, loadMode, true);
+    option("indentWithTabs", false);
+    option("smartIndent", true);
+    option("tabSize", 4, function (cm) {
+      resetModeState(cm);
+      clearCaches(cm);
+      regChange(cm);
+    }, true);
+
+    option("lineSeparator", null, function (cm, val) {
+      cm.doc.lineSep = val;
+      if (!val) { return }
+      var newBreaks = [], lineNo = cm.doc.first;
+      cm.doc.iter(function (line) {
+        for (var pos = 0;;) {
+          var found = line.text.indexOf(val, pos);
+          if (found == -1) { break }
+          pos = found + val.length;
+          newBreaks.push(Pos(lineNo, found));
+        }
+        lineNo++;
+      });
+      for (var i = newBreaks.length - 1; i >= 0; i--)
+        { replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)); }
+    });
+    option("specialChars", /[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b\u200e\u200f\u2028\u2029\ufeff\ufff9-\ufffc]/g, function (cm, val, old) {
+      cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
+      if (old != Init) { cm.refresh(); }
+    });
+    option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true);
+    option("electricChars", true);
+    option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
+      throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
+    }, true);
+    option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true);
+    option("autocorrect", false, function (cm, val) { return cm.getInputField().autocorrect = val; }, true);
+    option("autocapitalize", false, function (cm, val) { return cm.getInputField().autocapitalize = val; }, true);
+    option("rtlMoveVisually", !windows);
+    option("wholeLineUpdateBefore", true);
+
+    option("theme", "default", function (cm) {
+      themeChanged(cm);
+      updateGutters(cm);
+    }, true);
+    option("keyMap", "default", function (cm, val, old) {
+      var next = getKeyMap(val);
+      var prev = old != Init && getKeyMap(old);
+      if (prev && prev.detach) { prev.detach(cm, next); }
+      if (next.attach) { next.attach(cm, prev || null); }
+    });
+    option("extraKeys", null);
+    option("configureMouse", null);
+
+    option("lineWrapping", false, wrappingChanged, true);
+    option("gutters", [], function (cm, val) {
+      cm.display.gutterSpecs = getGutters(val, cm.options.lineNumbers);
+      updateGutters(cm);
+    }, true);
+    option("fixedGutter", true, function (cm, val) {
+      cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
+      cm.refresh();
+    }, true);
+    option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true);
+    option("scrollbarStyle", "native", function (cm) {
+      initScrollbars(cm);
+      updateScrollbars(cm);
+      cm.display.scrollbars.setScrollTop(cm.doc.scrollTop);
+      cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft);
+    }, true);
+    option("lineNumbers", false, function (cm, val) {
+      cm.display.gutterSpecs = getGutters(cm.options.gutters, val);
+      updateGutters(cm);
+    }, true);
+    option("firstLineNumber", 1, updateGutters, true);
+    option("lineNumberFormatter", function (integer) { return integer; }, updateGutters, true);
+    option("showCursorWhenSelecting", false, updateSelection, true);
+
+    option("resetSelectionOnContextMenu", true);
+    option("lineWiseCopyCut", true);
+    option("pasteLinesPerSelection", true);
+    option("selectionsMayTouch", false);
+
+    option("readOnly", false, function (cm, val) {
+      if (val == "nocursor") {
+        onBlur(cm);
+        cm.display.input.blur();
+      }
+      cm.display.input.readOnlyChanged(val);
+    });
+
+    option("screenReaderLabel", null, function (cm, val) {
+      val = (val === '') ? null : val;
+      cm.display.input.screenReaderLabelChanged(val);
+    });
+
+    option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset(); }}, true);
+    option("dragDrop", true, dragDropChanged);
+    option("allowDropFileTypes", null);
+
+    option("cursorBlinkRate", 530);
+    option("cursorScrollMargin", 0);
+    option("cursorHeight", 1, updateSelection, true);
+    option("singleCursorHeightPerLine", true, updateSelection, true);
+    option("workTime", 100);
+    option("workDelay", 100);
+    option("flattenSpans", true, resetModeState, true);
+    option("addModeClass", false, resetModeState, true);
+    option("pollInterval", 100);
+    option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; });
+    option("historyEventDelay", 1250);
+    option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true);
+    option("maxHighlightLength", 10000, resetModeState, true);
+    option("moveInputWithCursor", true, function (cm, val) {
+      if (!val) { cm.display.input.resetPosition(); }
+    });
+
+    option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; });
+    option("autofocus", null);
+    option("direction", "ltr", function (cm, val) { return cm.doc.setDirection(val); }, true);
+    option("phrases", null);
+  }
+
+  function dragDropChanged(cm, value, old) {
+    var wasOn = old && old != Init;
+    if (!value != !wasOn) {
+      var funcs = cm.display.dragFunctions;
+      var toggle = value ? on : off;
+      toggle(cm.display.scroller, "dragstart", funcs.start);
+      toggle(cm.display.scroller, "dragenter", funcs.enter);
+      toggle(cm.display.scroller, "dragover", funcs.over);
+      toggle(cm.display.scroller, "dragleave", funcs.leave);
+      toggle(cm.display.scroller, "drop", funcs.drop);
+    }
+  }
+
+  function wrappingChanged(cm) {
+    if (cm.options.lineWrapping) {
+      addClass(cm.display.wrapper, "CodeMirror-wrap");
+      cm.display.sizer.style.minWidth = "";
+      cm.display.sizerWidth = null;
+    } else {
+      rmClass(cm.display.wrapper, "CodeMirror-wrap");
+      findMaxLine(cm);
+    }
+    estimateLineHeights(cm);
+    regChange(cm);
+    clearCaches(cm);
+    setTimeout(function () { return updateScrollbars(cm); }, 100);
+  }
+
+  // A CodeMirror instance represents an editor. This is the object
+  // that user code is usually dealing with.
+
+  function CodeMirror(place, options) {
+    var this$1 = this;
+
+    if (!(this instanceof CodeMirror)) { return new CodeMirror(place, options) }
+
+    this.options = options = options ? copyObj(options) : {};
+    // Determine effective options based on given values and defaults.
+    copyObj(defaults, options, false);
+
+    var doc = options.value;
+    if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction); }
+    else if (options.mode) { doc.modeOption = options.mode; }
+    this.doc = doc;
+
+    var input = new CodeMirror.inputStyles[options.inputStyle](this);
+    var display = this.display = new Display(place, doc, input, options);
+    display.wrapper.CodeMirror = this;
+    themeChanged(this);
+    if (options.lineWrapping)
+      { this.display.wrapper.className += " CodeMirror-wrap"; }
+    initScrollbars(this);
+
+    this.state = {
+      keyMaps: [],  // stores maps added by addKeyMap
+      overlays: [], // highlighting overlays, as added by addOverlay
+      modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
+      overwrite: false,
+      delayingBlurEvent: false,
+      focused: false,
+      suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
+      pasteIncoming: -1, cutIncoming: -1, // help recognize paste/cut edits in input.poll
+      selectingText: false,
+      draggingText: false,
+      highlight: new Delayed(), // stores highlight worker timeout
+      keySeq: null,  // Unfinished key sequence
+      specialChars: null
+    };
+
+    if (options.autofocus && !mobile) { display.input.focus(); }
+
+    // Override magic textarea content restore that IE sometimes does
+    // on our hidden textarea on reload
+    if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20); }
+
+    registerEventHandlers(this);
+    ensureGlobalHandlers();
+
+    startOperation(this);
+    this.curOp.forceUpdate = true;
+    attachDoc(this, doc);
+
+    if ((options.autofocus && !mobile) || this.hasFocus())
+      { setTimeout(function () {
+        if (this$1.hasFocus() && !this$1.state.focused) { onFocus(this$1); }
+      }, 20); }
+    else
+      { onBlur(this); }
+
+    for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
+      { optionHandlers[opt](this, options[opt], Init); } }
+    maybeUpdateLineNumberWidth(this);
+    if (options.finishInit) { options.finishInit(this); }
+    for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this); }
+    endOperation(this);
+    // Suppress optimizelegibility in Webkit, since it breaks text
+    // measuring on line wrapping boundaries.
+    if (webkit && options.lineWrapping &&
+        getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
+      { display.lineDiv.style.textRendering = "auto"; }
+  }
+
+  // The default configuration options.
+  CodeMirror.defaults = defaults;
+  // Functions to run when options are changed.
+  CodeMirror.optionHandlers = optionHandlers;
+
+  // Attach the necessary event handlers when initializing the editor
+  function registerEventHandlers(cm) {
+    var d = cm.display;
+    on(d.scroller, "mousedown", operation(cm, onMouseDown));
+    // Older IE's will not fire a second mousedown for a double click
+    if (ie && ie_version < 11)
+      { on(d.scroller, "dblclick", operation(cm, function (e) {
+        if (signalDOMEvent(cm, e)) { return }
+        var pos = posFromMouse(cm, e);
+        if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
+        e_preventDefault(e);
+        var word = cm.findWordAt(pos);
+        extendSelection(cm.doc, word.anchor, word.head);
+      })); }
+    else
+      { on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }); }
+    // Some browsers fire contextmenu *after* opening the menu, at
+    // which point we can't mess with it anymore. Context menu is
+    // handled in onMouseDown for these browsers.
+    on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); });
+    on(d.input.getField(), "contextmenu", function (e) {
+      if (!d.scroller.contains(e.target)) { onContextMenu(cm, e); }
+    });
+
+    // Used to suppress mouse event handling when a touch happens
+    var touchFinished, prevTouch = {end: 0};
+    function finishTouch() {
+      if (d.activeTouch) {
+        touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000);
+        prevTouch = d.activeTouch;
+        prevTouch.end = +new Date;
+      }
+    }
+    function isMouseLikeTouchEvent(e) {
+      if (e.touches.length != 1) { return false }
+      var touch = e.touches[0];
+      return touch.radiusX <= 1 && touch.radiusY <= 1
+    }
+    function farAway(touch, other) {
+      if (other.left == null) { return true }
+      var dx = other.left - touch.left, dy = other.top - touch.top;
+      return dx * dx + dy * dy > 20 * 20
+    }
+    on(d.scroller, "touchstart", function (e) {
+      if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e) && !clickInGutter(cm, e)) {
+        d.input.ensurePolled();
+        clearTimeout(touchFinished);
+        var now = +new Date;
+        d.activeTouch = {start: now, moved: false,
+                         prev: now - prevTouch.end <= 300 ? prevTouch : null};
+        if (e.touches.length == 1) {
+          d.activeTouch.left = e.touches[0].pageX;
+          d.activeTouch.top = e.touches[0].pageY;
+        }
+      }
+    });
+    on(d.scroller, "touchmove", function () {
+      if (d.activeTouch) { d.activeTouch.moved = true; }
+    });
+    on(d.scroller, "touchend", function (e) {
+      var touch = d.activeTouch;
+      if (touch && !eventInWidget(d, e) && touch.left != null &&
+          !touch.moved && new Date - touch.start < 300) {
+        var pos = cm.coordsChar(d.activeTouch, "page"), range;
+        if (!touch.prev || farAway(touch, touch.prev)) // Single tap
+          { range = new Range(pos, pos); }
+        else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
+          { range = cm.findWordAt(pos); }
+        else // Triple tap
+          { range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))); }
+        cm.setSelection(range.anchor, range.head);
+        cm.focus();
+        e_preventDefault(e);
+      }
+      finishTouch();
+    });
+    on(d.scroller, "touchcancel", finishTouch);
+
+    // Sync scrolling between fake scrollbars and real scrollable
+    // area, ensure viewport is updated when scrolling.
+    on(d.scroller, "scroll", function () {
+      if (d.scroller.clientHeight) {
+        updateScrollTop(cm, d.scroller.scrollTop);
+        setScrollLeft(cm, d.scroller.scrollLeft, true);
+        signal(cm, "scroll", cm);
+      }
+    });
+
+    // Listen to wheel events in order to try and update the viewport on time.
+    on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); });
+    on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); });
+
+    // Prevent wrapper from ever scrolling
+    on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
+
+    d.dragFunctions = {
+      enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e); }},
+      over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }},
+      start: function (e) { return onDragStart(cm, e); },
+      drop: operation(cm, onDrop),
+      leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm); }}
+    };
+
+    var inp = d.input.getField();
+    on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); });
+    on(inp, "keydown", operation(cm, onKeyDown));
+    on(inp, "keypress", operation(cm, onKeyPress));
+    on(inp, "focus", function (e) { return onFocus(cm, e); });
+    on(inp, "blur", function (e) { return onBlur(cm, e); });
+  }
+
+  var initHooks = [];
+  CodeMirror.defineInitHook = function (f) { return initHooks.push(f); };
+
+  // Indent the given line. The how parameter can be "smart",
+  // "add"/null, "subtract", or "prev". When aggressive is false
+  // (typically set to true for forced single-line indents), empty
+  // lines are not indented, and places where the mode returns Pass
+  // are left alone.
+  function indentLine(cm, n, how, aggressive) {
+    var doc = cm.doc, state;
+    if (how == null) { how = "add"; }
+    if (how == "smart") {
+      // Fall back to "prev" when the mode doesn't have an indentation
+      // method.
+      if (!doc.mode.indent) { how = "prev"; }
+      else { state = getContextBefore(cm, n).state; }
+    }
+
+    var tabSize = cm.options.tabSize;
+    var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
+    if (line.stateAfter) { line.stateAfter = null; }
+    var curSpaceString = line.text.match(/^\s*/)[0], indentation;
+    if (!aggressive && !/\S/.test(line.text)) {
+      indentation = 0;
+      how = "not";
+    } else if (how == "smart") {
+      indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
+      if (indentation == Pass || indentation > 150) {
+        if (!aggressive) { return }
+        how = "prev";
+      }
+    }
+    if (how == "prev") {
+      if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize); }
+      else { indentation = 0; }
+    } else if (how == "add") {
+      indentation = curSpace + cm.options.indentUnit;
+    } else if (how == "subtract") {
+      indentation = curSpace - cm.options.indentUnit;
+    } else if (typeof how == "number") {
+      indentation = curSpace + how;
+    }
+    indentation = Math.max(0, indentation);
+
+    var indentString = "", pos = 0;
+    if (cm.options.indentWithTabs)
+      { for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";} }
+    if (pos < indentation) { indentString += spaceStr(indentation - pos); }
+
+    if (indentString != curSpaceString) {
+      replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
+      line.stateAfter = null;
+      return true
+    } else {
+      // Ensure that, if the cursor was in the whitespace at the start
+      // of the line, it is moved to the end of that space.
+      for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
+        var range = doc.sel.ranges[i$1];
+        if (range.head.line == n && range.head.ch < curSpaceString.length) {
+          var pos$1 = Pos(n, curSpaceString.length);
+          replaceOneSelection(doc, i$1, new Range(pos$1, pos$1));
+          break
+        }
+      }
+    }
+  }
+
+  // This will be set to a {lineWise: bool, text: [string]} object, so
+  // that, when pasting, we know what kind of selections the copied
+  // text was made out of.
+  var lastCopied = null;
+
+  function setLastCopied(newLastCopied) {
+    lastCopied = newLastCopied;
+  }
+
+  function applyTextInput(cm, inserted, deleted, sel, origin) {
+    var doc = cm.doc;
+    cm.display.shift = false;
+    if (!sel) { sel = doc.sel; }
+
+    var recent = +new Date - 200;
+    var paste = origin == "paste" || cm.state.pasteIncoming > recent;
+    var textLines = splitLinesAuto(inserted), multiPaste = null;
+    // When pasting N lines into N selections, insert one line per selection
+    if (paste && sel.ranges.length > 1) {
+      if (lastCopied && lastCopied.text.join("\n") == inserted) {
+        if (sel.ranges.length % lastCopied.text.length == 0) {
+          multiPaste = [];
+          for (var i = 0; i < lastCopied.text.length; i++)
+            { multiPaste.push(doc.splitLines(lastCopied.text[i])); }
+        }
+      } else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
+        multiPaste = map(textLines, function (l) { return [l]; });
+      }
+    }
+
+    var updateInput = cm.curOp.updateInput;
+    // Normal behavior is to insert the new text into every selection
+    for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
+      var range = sel.ranges[i$1];
+      var from = range.from(), to = range.to();
+      if (range.empty()) {
+        if (deleted && deleted > 0) // Handle deletion
+          { from = Pos(from.line, from.ch - deleted); }
+        else if (cm.state.overwrite && !paste) // Handle overwrite
+          { to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)); }
+        else if (paste && lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == textLines.join("\n"))
+          { from = to = Pos(from.line, 0); }
+      }
+      var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
+                         origin: origin || (paste ? "paste" : cm.state.cutIncoming > recent ? "cut" : "+input")};
+      makeChange(cm.doc, changeEvent);
+      signalLater(cm, "inputRead", cm, changeEvent);
+    }
+    if (inserted && !paste)
+      { triggerElectric(cm, inserted); }
+
+    ensureCursorVisible(cm);
+    if (cm.curOp.updateInput < 2) { cm.curOp.updateInput = updateInput; }
+    cm.curOp.typing = true;
+    cm.state.pasteIncoming = cm.state.cutIncoming = -1;
+  }
+
+  function handlePaste(e, cm) {
+    var pasted = e.clipboardData && e.clipboardData.getData("Text");
+    if (pasted) {
+      e.preventDefault();
+      if (!cm.isReadOnly() && !cm.options.disableInput)
+        { runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }); }
+      return true
+    }
+  }
+
+  function triggerElectric(cm, inserted) {
+    // When an 'electric' character is inserted, immediately trigger a reindent
+    if (!cm.options.electricChars || !cm.options.smartIndent) { return }
+    var sel = cm.doc.sel;
+
+    for (var i = sel.ranges.length - 1; i >= 0; i--) {
+      var range = sel.ranges[i];
+      if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) { continue }
+      var mode = cm.getModeAt(range.head);
+      var indented = false;
+      if (mode.electricChars) {
+        for (var j = 0; j < mode.electricChars.length; j++)
+          { if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
+            indented = indentLine(cm, range.head.line, "smart");
+            break
+          } }
+      } else if (mode.electricInput) {
+        if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
+          { indented = indentLine(cm, range.head.line, "smart"); }
+      }
+      if (indented) { signalLater(cm, "electricInput", cm, range.head.line); }
+    }
+  }
+
+  function copyableRanges(cm) {
+    var text = [], ranges = [];
+    for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
+      var line = cm.doc.sel.ranges[i].head.line;
+      var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
+      ranges.push(lineRange);
+      text.push(cm.getRange(lineRange.anchor, lineRange.head));
+    }
+    return {text: text, ranges: ranges}
+  }
+
+  function disableBrowserMagic(field, spellcheck, autocorrect, autocapitalize) {
+    field.setAttribute("autocorrect", autocorrect ? "" : "off");
+    field.setAttribute("autocapitalize", autocapitalize ? "" : "off");
+    field.setAttribute("spellcheck", !!spellcheck);
+  }
+
+  function hiddenTextarea() {
+    var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none");
+    var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
+    // The textarea is kept positioned near the cursor to prevent the
+    // fact that it'll be scrolled into view on input from scrolling
+    // our fake cursor out of view. On webkit, when wrap=off, paste is
+    // very slow. So make the area wide instead.
+    if (webkit) { te.style.width = "1000px"; }
+    else { te.setAttribute("wrap", "off"); }
+    // If border: 0; -- iOS fails to open keyboard (issue #1287)
+    if (ios) { te.style.border = "1px solid black"; }
+    disableBrowserMagic(te);
+    return div
+  }
+
+  // The publicly visible API. Note that methodOp(f) means
+  // 'wrap f in an operation, performed on its `this` parameter'.
+
+  // This is not the complete set of editor methods. Most of the
+  // methods defined on the Doc type are also injected into
+  // CodeMirror.prototype, for backwards compatibility and
+  // convenience.
+
+  function addEditorMethods(CodeMirror) {
+    var optionHandlers = CodeMirror.optionHandlers;
+
+    var helpers = CodeMirror.helpers = {};
+
+    CodeMirror.prototype = {
+      constructor: CodeMirror,
+      focus: function(){window.focus(); this.display.input.focus();},
+
+      setOption: function(option, value) {
+        var options = this.options, old = options[option];
+        if (options[option] == value && option != "mode") { return }
+        options[option] = value;
+        if (optionHandlers.hasOwnProperty(option))
+          { operation(this, optionHandlers[option])(this, value, old); }
+        signal(this, "optionChange", this, option);
+      },
+
+      getOption: function(option) {return this.options[option]},
+      getDoc: function() {return this.doc},
+
+      addKeyMap: function(map, bottom) {
+        this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map));
+      },
+      removeKeyMap: function(map) {
+        var maps = this.state.keyMaps;
+        for (var i = 0; i < maps.length; ++i)
+          { if (maps[i] == map || maps[i].name == map) {
+            maps.splice(i, 1);
+            return true
+          } }
+      },
+
+      addOverlay: methodOp(function(spec, options) {
+        var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
+        if (mode.startState) { throw new Error("Overlays may not be stateful.") }
+        insertSorted(this.state.overlays,
+                     {mode: mode, modeSpec: spec, opaque: options && options.opaque,
+                      priority: (options && options.priority) || 0},
+                     function (overlay) { return overlay.priority; });
+        this.state.modeGen++;
+        regChange(this);
+      }),
+      removeOverlay: methodOp(function(spec) {
+        var overlays = this.state.overlays;
+        for (var i = 0; i < overlays.length; ++i) {
+          var cur = overlays[i].modeSpec;
+          if (cur == spec || typeof spec == "string" && cur.name == spec) {
+            overlays.splice(i, 1);
+            this.state.modeGen++;
+            regChange(this);
+            return
+          }
+        }
+      }),
+
+      indentLine: methodOp(function(n, dir, aggressive) {
+        if (typeof dir != "string" && typeof dir != "number") {
+          if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev"; }
+          else { dir = dir ? "add" : "subtract"; }
+        }
+        if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive); }
+      }),
+      indentSelection: methodOp(function(how) {
+        var ranges = this.doc.sel.ranges, end = -1;
+        for (var i = 0; i < ranges.length; i++) {
+          var range = ranges[i];
+          if (!range.empty()) {
+            var from = range.from(), to = range.to();
+            var start = Math.max(end, from.line);
+            end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
+            for (var j = start; j < end; ++j)
+              { indentLine(this, j, how); }
+            var newRanges = this.doc.sel.ranges;
+            if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
+              { replaceOneSelection(this.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll); }
+          } else if (range.head.line > end) {
+            indentLine(this, range.head.line, how, true);
+            end = range.head.line;
+            if (i == this.doc.sel.primIndex) { ensureCursorVisible(this); }
+          }
+        }
+      }),
+
+      // Fetch the parser token for a given character. Useful for hacks
+      // that want to inspect the mode state (say, for completion).
+      getTokenAt: function(pos, precise) {
+        return takeToken(this, pos, precise)
+      },
+
+      getLineTokens: function(line, precise) {
+        return takeToken(this, Pos(line), precise, true)
+      },
+
+      getTokenTypeAt: function(pos) {
+        pos = clipPos(this.doc, pos);
+        var styles = getLineStyles(this, getLine(this.doc, pos.line));
+        var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
+        var type;
+        if (ch == 0) { type = styles[2]; }
+        else { for (;;) {
+          var mid = (before + after) >> 1;
+          if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid; }
+          else if (styles[mid * 2 + 1] < ch) { before = mid + 1; }
+          else { type = styles[mid * 2 + 2]; break }
+        } }
+        var cut = type ? type.indexOf("overlay ") : -1;
+        return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
+      },
+
+      getModeAt: function(pos) {
+        var mode = this.doc.mode;
+        if (!mode.innerMode) { return mode }
+        return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
+      },
+
+      getHelper: function(pos, type) {
+        return this.getHelpers(pos, type)[0]
+      },
+
+      getHelpers: function(pos, type) {
+        var found = [];
+        if (!helpers.hasOwnProperty(type)) { return found }
+        var help = helpers[type], mode = this.getModeAt(pos);
+        if (typeof mode[type] == "string") {
+          if (help[mode[type]]) { found.push(help[mode[type]]); }
+        } else if (mode[type]) {
+          for (var i = 0; i < mode[type].length; i++) {
+            var val = help[mode[type][i]];
+            if (val) { found.push(val); }
+          }
+        } else if (mode.helperType && help[mode.helperType]) {
+          found.push(help[mode.helperType]);
+        } else if (help[mode.name]) {
+          found.push(help[mode.name]);
+        }
+        for (var i$1 = 0; i$1 < help._global.length; i$1++) {
+          var cur = help._global[i$1];
+          if (cur.pred(mode, this) && indexOf(found, cur.val) == -1)
+            { found.push(cur.val); }
+        }
+        return found
+      },
+
+      getStateAfter: function(line, precise) {
+        var doc = this.doc;
+        line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
+        return getContextBefore(this, line + 1, precise).state
+      },
+
+      cursorCoords: function(start, mode) {
+        var pos, range = this.doc.sel.primary();
+        if (start == null) { pos = range.head; }
+        else if (typeof start == "object") { pos = clipPos(this.doc, start); }
+        else { pos = start ? range.from() : range.to(); }
+        return cursorCoords(this, pos, mode || "page")
+      },
+
+      charCoords: function(pos, mode) {
+        return charCoords(this, clipPos(this.doc, pos), mode || "page")
+      },
+
+      coordsChar: function(coords, mode) {
+        coords = fromCoordSystem(this, coords, mode || "page");
+        return coordsChar(this, coords.left, coords.top)
+      },
+
+      lineAtHeight: function(height, mode) {
+        height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
+        return lineAtHeight(this.doc, height + this.display.viewOffset)
+      },
+      heightAtLine: function(line, mode, includeWidgets) {
+        var end = false, lineObj;
+        if (typeof line == "number") {
+          var last = this.doc.first + this.doc.size - 1;
+          if (line < this.doc.first) { line = this.doc.first; }
+          else if (line > last) { line = last; end = true; }
+          lineObj = getLine(this.doc, line);
+        } else {
+          lineObj = line;
+        }
+        return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page", includeWidgets || end).top +
+          (end ? this.doc.height - heightAtLine(lineObj) : 0)
+      },
+
+      defaultTextHeight: function() { return textHeight(this.display) },
+      defaultCharWidth: function() { return charWidth(this.display) },
+
+      getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},
+
+      addWidget: function(pos, node, scroll, vert, horiz) {
+        var display = this.display;
+        pos = cursorCoords(this, clipPos(this.doc, pos));
+        var top = pos.bottom, left = pos.left;
+        node.style.position = "absolute";
+        node.setAttribute("cm-ignore-events", "true");
+        this.display.input.setUneditable(node);
+        display.sizer.appendChild(node);
+        if (vert == "over") {
+          top = pos.top;
+        } else if (vert == "above" || vert == "near") {
+          var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
+          hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
+          // Default to positioning above (if specified and possible); otherwise default to positioning below
+          if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
+            { top = pos.top - node.offsetHeight; }
+          else if (pos.bottom + node.offsetHeight <= vspace)
+            { top = pos.bottom; }
+          if (left + node.offsetWidth > hspace)
+            { left = hspace - node.offsetWidth; }
+        }
+        node.style.top = top + "px";
+        node.style.left = node.style.right = "";
+        if (horiz == "right") {
+          left = display.sizer.clientWidth - node.offsetWidth;
+          node.style.right = "0px";
+        } else {
+          if (horiz == "left") { left = 0; }
+          else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2; }
+          node.style.left = left + "px";
+        }
+        if (scroll)
+          { scrollIntoView(this, {left: left, top: top, right: left + node.offsetWidth, bottom: top + node.offsetHeight}); }
+      },
+
+      triggerOnKeyDown: methodOp(onKeyDown),
+      triggerOnKeyPress: methodOp(onKeyPress),
+      triggerOnKeyUp: onKeyUp,
+      triggerOnMouseDown: methodOp(onMouseDown),
+
+      execCommand: function(cmd) {
+        if (commands.hasOwnProperty(cmd))
+          { return commands[cmd].call(null, this) }
+      },
+
+      triggerElectric: methodOp(function(text) { triggerElectric(this, text); }),
+
+      findPosH: function(from, amount, unit, visually) {
+        var dir = 1;
+        if (amount < 0) { dir = -1; amount = -amount; }
+        var cur = clipPos(this.doc, from);
+        for (var i = 0; i < amount; ++i) {
+          cur = findPosH(this.doc, cur, dir, unit, visually);
+          if (cur.hitSide) { break }
+        }
+        return cur
+      },
+
+      moveH: methodOp(function(dir, unit) {
+        var this$1 = this;
+
+        this.extendSelectionsBy(function (range) {
+          if (this$1.display.shift || this$1.doc.extend || range.empty())
+            { return findPosH(this$1.doc, range.head, dir, unit, this$1.options.rtlMoveVisually) }
+          else
+            { return dir < 0 ? range.from() : range.to() }
+        }, sel_move);
+      }),
+
+      deleteH: methodOp(function(dir, unit) {
+        var sel = this.doc.sel, doc = this.doc;
+        if (sel.somethingSelected())
+          { doc.replaceSelection("", null, "+delete"); }
+        else
+          { deleteNearSelection(this, function (range) {
+            var other = findPosH(doc, range.head, dir, unit, false);
+            return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other}
+          }); }
+      }),
+
+      findPosV: function(from, amount, unit, goalColumn) {
+        var dir = 1, x = goalColumn;
+        if (amount < 0) { dir = -1; amount = -amount; }
+        var cur = clipPos(this.doc, from);
+        for (var i = 0; i < amount; ++i) {
+          var coords = cursorCoords(this, cur, "div");
+          if (x == null) { x = coords.left; }
+          else { coords.left = x; }
+          cur = findPosV(this, coords, dir, unit);
+          if (cur.hitSide) { break }
+        }
+        return cur
+      },
+
+      moveV: methodOp(function(dir, unit) {
+        var this$1 = this;
+
+        var doc = this.doc, goals = [];
+        var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected();
+        doc.extendSelectionsBy(function (range) {
+          if (collapse)
+            { return dir < 0 ? range.from() : range.to() }
+          var headPos = cursorCoords(this$1, range.head, "div");
+          if (range.goalColumn != null) { headPos.left = range.goalColumn; }
+          goals.push(headPos.left);
+          var pos = findPosV(this$1, headPos, dir, unit);
+          if (unit == "page" && range == doc.sel.primary())
+            { addToScrollTop(this$1, charCoords(this$1, pos, "div").top - headPos.top); }
+          return pos
+        }, sel_move);
+        if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
+          { doc.sel.ranges[i].goalColumn = goals[i]; } }
+      }),
+
+      // Find the word at the given position (as returned by coordsChar).
+      findWordAt: function(pos) {
+        var doc = this.doc, line = getLine(doc, pos.line).text;
+        var start = pos.ch, end = pos.ch;
+        if (line) {
+          var helper = this.getHelper(pos, "wordChars");
+          if ((pos.sticky == "before" || end == line.length) && start) { --start; } else { ++end; }
+          var startChar = line.charAt(start);
+          var check = isWordChar(startChar, helper)
+            ? function (ch) { return isWordChar(ch, helper); }
+            : /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
+            : function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); };
+          while (start > 0 && check(line.charAt(start - 1))) { --start; }
+          while (end < line.length && check(line.charAt(end))) { ++end; }
+        }
+        return new Range(Pos(pos.line, start), Pos(pos.line, end))
+      },
+
+      toggleOverwrite: function(value) {
+        if (value != null && value == this.state.overwrite) { return }
+        if (this.state.overwrite = !this.state.overwrite)
+          { addClass(this.display.cursorDiv, "CodeMirror-overwrite"); }
+        else
+          { rmClass(this.display.cursorDiv, "CodeMirror-overwrite"); }
+
+        signal(this, "overwriteToggle", this, this.state.overwrite);
+      },
+      hasFocus: function() { return this.display.input.getField() == activeElt() },
+      isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },
+
+      scrollTo: methodOp(function (x, y) { scrollToCoords(this, x, y); }),
+      getScrollInfo: function() {
+        var scroller = this.display.scroller;
+        return {left: scroller.scrollLeft, top: scroller.scrollTop,
+                height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
+                width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
+                clientHeight: displayHeight(this), clientWidth: displayWidth(this)}
+      },
+
+      scrollIntoView: methodOp(function(range, margin) {
+        if (range == null) {
+          range = {from: this.doc.sel.primary().head, to: null};
+          if (margin == null) { margin = this.options.cursorScrollMargin; }
+        } else if (typeof range == "number") {
+          range = {from: Pos(range, 0), to: null};
+        } else if (range.from == null) {
+          range = {from: range, to: null};
+        }
+        if (!range.to) { range.to = range.from; }
+        range.margin = margin || 0;
+
+        if (range.from.line != null) {
+          scrollToRange(this, range);
+        } else {
+          scrollToCoordsRange(this, range.from, range.to, range.margin);
+        }
+      }),
+
+      setSize: methodOp(function(width, height) {
+        var this$1 = this;
+
+        var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; };
+        if (width != null) { this.display.wrapper.style.width = interpret(width); }
+        if (height != null) { this.display.wrapper.style.height = interpret(height); }
+        if (this.options.lineWrapping) { clearLineMeasurementCache(this); }
+        var lineNo = this.display.viewFrom;
+        this.doc.iter(lineNo, this.display.viewTo, function (line) {
+          if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
+            { if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo, "widget"); break } } }
+          ++lineNo;
+        });
+        this.curOp.forceUpdate = true;
+        signal(this, "refresh", this);
+      }),
+
+      operation: function(f){return runInOp(this, f)},
+      startOperation: function(){return startOperation(this)},
+      endOperation: function(){return endOperation(this)},
+
+      refresh: methodOp(function() {
+        var oldHeight = this.display.cachedTextHeight;
+        regChange(this);
+        this.curOp.forceUpdate = true;
+        clearCaches(this);
+        scrollToCoords(this, this.doc.scrollLeft, this.doc.scrollTop);
+        updateGutterSpace(this.display);
+        if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5 || this.options.lineWrapping)
+          { estimateLineHeights(this); }
+        signal(this, "refresh", this);
+      }),
+
+      swapDoc: methodOp(function(doc) {
+        var old = this.doc;
+        old.cm = null;
+        // Cancel the current text selection if any (#5821)
+        if (this.state.selectingText) { this.state.selectingText(); }
+        attachDoc(this, doc);
+        clearCaches(this);
+        this.display.input.reset();
+        scrollToCoords(this, doc.scrollLeft, doc.scrollTop);
+        this.curOp.forceScroll = true;
+        signalLater(this, "swapDoc", this, old);
+        return old
+      }),
+
+      phrase: function(phraseText) {
+        var phrases = this.options.phrases;
+        return phrases && Object.prototype.hasOwnProperty.call(phrases, phraseText) ? phrases[phraseText] : phraseText
+      },
+
+      getInputField: function(){return this.display.input.getField()},
+      getWrapperElement: function(){return this.display.wrapper},
+      getScrollerElement: function(){return this.display.scroller},
+      getGutterElement: function(){return this.display.gutters}
+    };
+    eventMixin(CodeMirror);
+
+    CodeMirror.registerHelper = function(type, name, value) {
+      if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []}; }
+      helpers[type][name] = value;
+    };
+    CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
+      CodeMirror.registerHelper(type, name, value);
+      helpers[type]._global.push({pred: predicate, val: value});
+    };
+  }
+
+  // Used for horizontal relative motion. Dir is -1 or 1 (left or
+  // right), unit can be "codepoint", "char", "column" (like char, but
+  // doesn't cross line boundaries), "word" (across next word), or
+  // "group" (to the start of next group of word or
+  // non-word-non-whitespace chars). The visually param controls
+  // whether, in right-to-left text, direction 1 means to move towards
+  // the next index in the string, or towards the character to the right
+  // of the current position. The resulting position will have a
+  // hitSide=true property if it reached the end of the document.
+  function findPosH(doc, pos, dir, unit, visually) {
+    var oldPos = pos;
+    var origDir = dir;
+    var lineObj = getLine(doc, pos.line);
+    var lineDir = visually && doc.direction == "rtl" ? -dir : dir;
+    function findNextLine() {
+      var l = pos.line + lineDir;
+      if (l < doc.first || l >= doc.first + doc.size) { return false }
+      pos = new Pos(l, pos.ch, pos.sticky);
+      return lineObj = getLine(doc, l)
+    }
+    function moveOnce(boundToLine) {
+      var next;
+      if (unit == "codepoint") {
+        var ch = lineObj.text.charCodeAt(pos.ch + (dir > 0 ? 0 : -1));
+        if (isNaN(ch)) {
+          next = null;
+        } else {
+          var astral = dir > 0 ? ch >= 0xD800 && ch < 0xDC00 : ch >= 0xDC00 && ch < 0xDFFF;
+          next = new Pos(pos.line, Math.max(0, Math.min(lineObj.text.length, pos.ch + dir * (astral ? 2 : 1))), -dir);
+        }
+      } else if (visually) {
+        next = moveVisually(doc.cm, lineObj, pos, dir);
+      } else {
+        next = moveLogically(lineObj, pos, dir);
+      }
+      if (next == null) {
+        if (!boundToLine && findNextLine())
+          { pos = endOfLine(visually, doc.cm, lineObj, pos.line, lineDir); }
+        else
+          { return false }
+      } else {
+        pos = next;
+      }
+      return true
+    }
+
+    if (unit == "char" || unit == "codepoint") {
+      moveOnce();
+    } else if (unit == "column") {
+      moveOnce(true);
+    } else if (unit == "word" || unit == "group") {
+      var sawType = null, group = unit == "group";
+      var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
+      for (var first = true;; first = false) {
+        if (dir < 0 && !moveOnce(!first)) { break }
+        var cur = lineObj.text.charAt(pos.ch) || "\n";
+        var type = isWordChar(cur, helper) ? "w"
+          : group && cur == "\n" ? "n"
+          : !group || /\s/.test(cur) ? null
+          : "p";
+        if (group && !first && !type) { type = "s"; }
+        if (sawType && sawType != type) {
+          if (dir < 0) {dir = 1; moveOnce(); pos.sticky = "after";}
+          break
+        }
+
+        if (type) { sawType = type; }
+        if (dir > 0 && !moveOnce(!first)) { break }
+      }
+    }
+    var result = skipAtomic(doc, pos, oldPos, origDir, true);
+    if (equalCursorPos(oldPos, result)) { result.hitSide = true; }
+    return result
+  }
+
+  // For relative vertical movement. Dir may be -1 or 1. Unit can be
+  // "page" or "line". The resulting position will have a hitSide=true
+  // property if it reached the end of the document.
+  function findPosV(cm, pos, dir, unit) {
+    var doc = cm.doc, x = pos.left, y;
+    if (unit == "page") {
+      var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
+      var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3);
+      y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount;
+
+    } else if (unit == "line") {
+      y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
+    }
+    var target;
+    for (;;) {
+      target = coordsChar(cm, x, y);
+      if (!target.outside) { break }
+      if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
+      y += dir * 5;
+    }
+    return target
+  }
+
+  // CONTENTEDITABLE INPUT STYLE
+
+  var ContentEditableInput = function(cm) {
+    this.cm = cm;
+    this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null;
+    this.polling = new Delayed();
+    this.composing = null;
+    this.gracePeriod = false;
+    this.readDOMTimeout = null;
+  };
+
+  ContentEditableInput.prototype.init = function (display) {
+      var this$1 = this;
+
+    var input = this, cm = input.cm;
+    var div = input.div = display.lineDiv;
+    div.contentEditable = true;
+    disableBrowserMagic(div, cm.options.spellcheck, cm.options.autocorrect, cm.options.autocapitalize);
+
+    function belongsToInput(e) {
+      for (var t = e.target; t; t = t.parentNode) {
+        if (t == div) { return true }
+        if (/\bCodeMirror-(?:line)?widget\b/.test(t.className)) { break }
+      }
+      return false
+    }
+
+    on(div, "paste", function (e) {
+      if (!belongsToInput(e) || signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+      // IE doesn't fire input events, so we schedule a read for the pasted content in this way
+      if (ie_version <= 11) { setTimeout(operation(cm, function () { return this$1.updateFromDOM(); }), 20); }
+    });
+
+    on(div, "compositionstart", function (e) {
+      this$1.composing = {data: e.data, done: false};
+    });
+    on(div, "compositionupdate", function (e) {
+      if (!this$1.composing) { this$1.composing = {data: e.data, done: false}; }
+    });
+    on(div, "compositionend", function (e) {
+      if (this$1.composing) {
+        if (e.data != this$1.composing.data) { this$1.readFromDOMSoon(); }
+        this$1.composing.done = true;
+      }
+    });
+
+    on(div, "touchstart", function () { return input.forceCompositionEnd(); });
+
+    on(div, "input", function () {
+      if (!this$1.composing) { this$1.readFromDOMSoon(); }
+    });
+
+    function onCopyCut(e) {
+      if (!belongsToInput(e) || signalDOMEvent(cm, e)) { return }
+      if (cm.somethingSelected()) {
+        setLastCopied({lineWise: false, text: cm.getSelections()});
+        if (e.type == "cut") { cm.replaceSelection("", null, "cut"); }
+      } else if (!cm.options.lineWiseCopyCut) {
+        return
+      } else {
+        var ranges = copyableRanges(cm);
+        setLastCopied({lineWise: true, text: ranges.text});
+        if (e.type == "cut") {
+          cm.operation(function () {
+            cm.setSelections(ranges.ranges, 0, sel_dontScroll);
+            cm.replaceSelection("", null, "cut");
+          });
+        }
+      }
+      if (e.clipboardData) {
+        e.clipboardData.clearData();
+        var content = lastCopied.text.join("\n");
+        // iOS exposes the clipboard API, but seems to discard content inserted into it
+        e.clipboardData.setData("Text", content);
+        if (e.clipboardData.getData("Text") == content) {
+          e.preventDefault();
+          return
+        }
+      }
+      // Old-fashioned briefly-focus-a-textarea hack
+      var kludge = hiddenTextarea(), te = kludge.firstChild;
+      cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild);
+      te.value = lastCopied.text.join("\n");
+      var hadFocus = activeElt();
+      selectInput(te);
+      setTimeout(function () {
+        cm.display.lineSpace.removeChild(kludge);
+        hadFocus.focus();
+        if (hadFocus == div) { input.showPrimarySelection(); }
+      }, 50);
+    }
+    on(div, "copy", onCopyCut);
+    on(div, "cut", onCopyCut);
+  };
+
+  ContentEditableInput.prototype.screenReaderLabelChanged = function (label) {
+    // Label for screenreaders, accessibility
+    if(label) {
+      this.div.setAttribute('aria-label', label);
+    } else {
+      this.div.removeAttribute('aria-label');
+    }
+  };
+
+  ContentEditableInput.prototype.prepareSelection = function () {
+    var result = prepareSelection(this.cm, false);
+    result.focus = activeElt() == this.div;
+    return result
+  };
+
+  ContentEditableInput.prototype.showSelection = function (info, takeFocus) {
+    if (!info || !this.cm.display.view.length) { return }
+    if (info.focus || takeFocus) { this.showPrimarySelection(); }
+    this.showMultipleSelections(info);
+  };
+
+  ContentEditableInput.prototype.getSelection = function () {
+    return this.cm.display.wrapper.ownerDocument.getSelection()
+  };
+
+  ContentEditableInput.prototype.showPrimarySelection = function () {
+    var sel = this.getSelection(), cm = this.cm, prim = cm.doc.sel.primary();
+    var from = prim.from(), to = prim.to();
+
+    if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
+      sel.removeAllRanges();
+      return
+    }
+
+    var curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
+    var curFocus = domToPos(cm, sel.focusNode, sel.focusOffset);
+    if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
+        cmp(minPos(curAnchor, curFocus), from) == 0 &&
+        cmp(maxPos(curAnchor, curFocus), to) == 0)
+      { return }
+
+    var view = cm.display.view;
+    var start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
+        {node: view[0].measure.map[2], offset: 0};
+    var end = to.line < cm.display.viewTo && posToDOM(cm, to);
+    if (!end) {
+      var measure = view[view.length - 1].measure;
+      var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map;
+      end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]};
+    }
+
+    if (!start || !end) {
+      sel.removeAllRanges();
+      return
+    }
+
+    var old = sel.rangeCount && sel.getRangeAt(0), rng;
+    try { rng = range(start.node, start.offset, end.offset, end.node); }
+    catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
+    if (rng) {
+      if (!gecko && cm.state.focused) {
+        sel.collapse(start.node, start.offset);
+        if (!rng.collapsed) {
+          sel.removeAllRanges();
+          sel.addRange(rng);
+        }
+      } else {
+        sel.removeAllRanges();
+        sel.addRange(rng);
+      }
+      if (old && sel.anchorNode == null) { sel.addRange(old); }
+      else if (gecko) { this.startGracePeriod(); }
+    }
+    this.rememberSelection();
+  };
+
+  ContentEditableInput.prototype.startGracePeriod = function () {
+      var this$1 = this;
+
+    clearTimeout(this.gracePeriod);
+    this.gracePeriod = setTimeout(function () {
+      this$1.gracePeriod = false;
+      if (this$1.selectionChanged())
+        { this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }); }
+    }, 20);
+  };
+
+  ContentEditableInput.prototype.showMultipleSelections = function (info) {
+    removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors);
+    removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection);
+  };
+
+  ContentEditableInput.prototype.rememberSelection = function () {
+    var sel = this.getSelection();
+    this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset;
+    this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset;
+  };
+
+  ContentEditableInput.prototype.selectionInEditor = function () {
+    var sel = this.getSelection();
+    if (!sel.rangeCount) { return false }
+    var node = sel.getRangeAt(0).commonAncestorContainer;
+    return contains(this.div, node)
+  };
+
+  ContentEditableInput.prototype.focus = function () {
+    if (this.cm.options.readOnly != "nocursor") {
+      if (!this.selectionInEditor() || activeElt() != this.div)
+        { this.showSelection(this.prepareSelection(), true); }
+      this.div.focus();
+    }
+  };
+  ContentEditableInput.prototype.blur = function () { this.div.blur(); };
+  ContentEditableInput.prototype.getField = function () { return this.div };
+
+  ContentEditableInput.prototype.supportsTouch = function () { return true };
+
+  ContentEditableInput.prototype.receivedFocus = function () {
+      var this$1 = this;
+
+    var input = this;
+    if (this.selectionInEditor())
+      { setTimeout(function () { return this$1.pollSelection(); }, 20); }
+    else
+      { runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }); }
+
+    function poll() {
+      if (input.cm.state.focused) {
+        input.pollSelection();
+        input.polling.set(input.cm.options.pollInterval, poll);
+      }
+    }
+    this.polling.set(this.cm.options.pollInterval, poll);
+  };
+
+  ContentEditableInput.prototype.selectionChanged = function () {
+    var sel = this.getSelection();
+    return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
+      sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
+  };
+
+  ContentEditableInput.prototype.pollSelection = function () {
+    if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) { return }
+    var sel = this.getSelection(), cm = this.cm;
+    // On Android Chrome (version 56, at least), backspacing into an
+    // uneditable block element will put the cursor in that element,
+    // and then, because it's not editable, hide the virtual keyboard.
+    // Because Android doesn't allow us to actually detect backspace
+    // presses in a sane way, this code checks for when that happens
+    // and simulates a backspace press in this case.
+    if (android && chrome && this.cm.display.gutterSpecs.length && isInGutter(sel.anchorNode)) {
+      this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs});
+      this.blur();
+      this.focus();
+      return
+    }
+    if (this.composing) { return }
+    this.rememberSelection();
+    var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
+    var head = domToPos(cm, sel.focusNode, sel.focusOffset);
+    if (anchor && head) { runInOp(cm, function () {
+      setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll);
+      if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true; }
+    }); }
+  };
+
+  ContentEditableInput.prototype.pollContent = function () {
+    if (this.readDOMTimeout != null) {
+      clearTimeout(this.readDOMTimeout);
+      this.readDOMTimeout = null;
+    }
+
+    var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary();
+    var from = sel.from(), to = sel.to();
+    if (from.ch == 0 && from.line > cm.firstLine())
+      { from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length); }
+    if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
+      { to = Pos(to.line + 1, 0); }
+    if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }
+
+    var fromIndex, fromLine, fromNode;
+    if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
+      fromLine = lineNo(display.view[0].line);
+      fromNode = display.view[0].node;
+    } else {
+      fromLine = lineNo(display.view[fromIndex].line);
+      fromNode = display.view[fromIndex - 1].node.nextSibling;
+    }
+    var toIndex = findViewIndex(cm, to.line);
+    var toLine, toNode;
+    if (toIndex == display.view.length - 1) {
+      toLine = display.viewTo - 1;
+      toNode = display.lineDiv.lastChild;
+    } else {
+      toLine = lineNo(display.view[toIndex + 1].line) - 1;
+      toNode = display.view[toIndex + 1].node.previousSibling;
+    }
+
+    if (!fromNode) { return false }
+    var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
+    var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length));
+    while (newText.length > 1 && oldText.length > 1) {
+      if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; }
+      else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++; }
+      else { break }
+    }
+
+    var cutFront = 0, cutEnd = 0;
+    var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length);
+    while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
+      { ++cutFront; }
+    var newBot = lst(newText), oldBot = lst(oldText);
+    var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
+                             oldBot.length - (oldText.length == 1 ? cutFront : 0));
+    while (cutEnd < maxCutEnd &&
+           newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
+      { ++cutEnd; }
+    // Try to move start of change to start of selection if ambiguous
+    if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
+      while (cutFront && cutFront > from.ch &&
+             newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
+        cutFront--;
+        cutEnd++;
+      }
+    }
+
+    newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "");
+    newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "");
+
+    var chFrom = Pos(fromLine, cutFront);
+    var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0);
+    if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
+      replaceRange(cm.doc, newText, chFrom, chTo, "+input");
+      return true
+    }
+  };
+
+  ContentEditableInput.prototype.ensurePolled = function () {
+    this.forceCompositionEnd();
+  };
+  ContentEditableInput.prototype.reset = function () {
+    this.forceCompositionEnd();
+  };
+  ContentEditableInput.prototype.forceCompositionEnd = function () {
+    if (!this.composing) { return }
+    clearTimeout(this.readDOMTimeout);
+    this.composing = null;
+    this.updateFromDOM();
+    this.div.blur();
+    this.div.focus();
+  };
+  ContentEditableInput.prototype.readFromDOMSoon = function () {
+      var this$1 = this;
+
+    if (this.readDOMTimeout != null) { return }
+    this.readDOMTimeout = setTimeout(function () {
+      this$1.readDOMTimeout = null;
+      if (this$1.composing) {
+        if (this$1.composing.done) { this$1.composing = null; }
+        else { return }
+      }
+      this$1.updateFromDOM();
+    }, 80);
+  };
+
+  ContentEditableInput.prototype.updateFromDOM = function () {
+      var this$1 = this;
+
+    if (this.cm.isReadOnly() || !this.pollContent())
+      { runInOp(this.cm, function () { return regChange(this$1.cm); }); }
+  };
+
+  ContentEditableInput.prototype.setUneditable = function (node) {
+    node.contentEditable = "false";
+  };
+
+  ContentEditableInput.prototype.onKeyPress = function (e) {
+    if (e.charCode == 0 || this.composing) { return }
+    e.preventDefault();
+    if (!this.cm.isReadOnly())
+      { operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0); }
+  };
+
+  ContentEditableInput.prototype.readOnlyChanged = function (val) {
+    this.div.contentEditable = String(val != "nocursor");
+  };
+
+  ContentEditableInput.prototype.onContextMenu = function () {};
+  ContentEditableInput.prototype.resetPosition = function () {};
+
+  ContentEditableInput.prototype.needsContentAttribute = true;
+
+  function posToDOM(cm, pos) {
+    var view = findViewForLine(cm, pos.line);
+    if (!view || view.hidden) { return null }
+    var line = getLine(cm.doc, pos.line);
+    var info = mapFromLineView(view, line, pos.line);
+
+    var order = getOrder(line, cm.doc.direction), side = "left";
+    if (order) {
+      var partPos = getBidiPartAt(order, pos.ch);
+      side = partPos % 2 ? "right" : "left";
+    }
+    var result = nodeAndOffsetInLineMap(info.map, pos.ch, side);
+    result.offset = result.collapse == "right" ? result.end : result.start;
+    return result
+  }
+
+  function isInGutter(node) {
+    for (var scan = node; scan; scan = scan.parentNode)
+      { if (/CodeMirror-gutter-wrapper/.test(scan.className)) { return true } }
+    return false
+  }
+
+  function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }
+
+  function domTextBetween(cm, from, to, fromLine, toLine) {
+    var text = "", closing = false, lineSep = cm.doc.lineSeparator(), extraLinebreak = false;
+    function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
+    function close() {
+      if (closing) {
+        text += lineSep;
+        if (extraLinebreak) { text += lineSep; }
+        closing = extraLinebreak = false;
+      }
+    }
+    function addText(str) {
+      if (str) {
+        close();
+        text += str;
+      }
+    }
+    function walk(node) {
+      if (node.nodeType == 1) {
+        var cmText = node.getAttribute("cm-text");
+        if (cmText) {
+          addText(cmText);
+          return
+        }
+        var markerID = node.getAttribute("cm-marker"), range;
+        if (markerID) {
+          var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID));
+          if (found.length && (range = found[0].find(0)))
+            { addText(getBetween(cm.doc, range.from, range.to).join(lineSep)); }
+          return
+        }
+        if (node.getAttribute("contenteditable") == "false") { return }
+        var isBlock = /^(pre|div|p|li|table|br)$/i.test(node.nodeName);
+        if (!/^br$/i.test(node.nodeName) && node.textContent.length == 0) { return }
+
+        if (isBlock) { close(); }
+        for (var i = 0; i < node.childNodes.length; i++)
+          { walk(node.childNodes[i]); }
+
+        if (/^(pre|p)$/i.test(node.nodeName)) { extraLinebreak = true; }
+        if (isBlock) { closing = true; }
+      } else if (node.nodeType == 3) {
+        addText(node.nodeValue.replace(/\u200b/g, "").replace(/\u00a0/g, " "));
+      }
+    }
+    for (;;) {
+      walk(from);
+      if (from == to) { break }
+      from = from.nextSibling;
+      extraLinebreak = false;
+    }
+    return text
+  }
+
+  function domToPos(cm, node, offset) {
+    var lineNode;
+    if (node == cm.display.lineDiv) {
+      lineNode = cm.display.lineDiv.childNodes[offset];
+      if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
+      node = null; offset = 0;
+    } else {
+      for (lineNode = node;; lineNode = lineNode.parentNode) {
+        if (!lineNode || lineNode == cm.display.lineDiv) { return null }
+        if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
+      }
+    }
+    for (var i = 0; i < cm.display.view.length; i++) {
+      var lineView = cm.display.view[i];
+      if (lineView.node == lineNode)
+        { return locateNodeInLineView(lineView, node, offset) }
+    }
+  }
+
+  function locateNodeInLineView(lineView, node, offset) {
+    var wrapper = lineView.text.firstChild, bad = false;
+    if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
+    if (node == wrapper) {
+      bad = true;
+      node = wrapper.childNodes[offset];
+      offset = 0;
+      if (!node) {
+        var line = lineView.rest ? lst(lineView.rest) : lineView.line;
+        return badPos(Pos(lineNo(line), line.text.length), bad)
+      }
+    }
+
+    var textNode = node.nodeType == 3 ? node : null, topNode = node;
+    if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
+      textNode = node.firstChild;
+      if (offset) { offset = textNode.nodeValue.length; }
+    }
+    while (topNode.parentNode != wrapper) { topNode = topNode.parentNode; }
+    var measure = lineView.measure, maps = measure.maps;
+
+    function find(textNode, topNode, offset) {
+      for (var i = -1; i < (maps ? maps.length : 0); i++) {
+        var map = i < 0 ? measure.map : maps[i];
+        for (var j = 0; j < map.length; j += 3) {
+          var curNode = map[j + 2];
+          if (curNode == textNode || curNode == topNode) {
+            var line = lineNo(i < 0 ? lineView.line : lineView.rest[i]);
+            var ch = map[j] + offset;
+            if (offset < 0 || curNode != textNode) { ch = map[j + (offset ? 1 : 0)]; }
+            return Pos(line, ch)
+          }
+        }
+      }
+    }
+    var found = find(textNode, topNode, offset);
+    if (found) { return badPos(found, bad) }
+
+    // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
+    for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
+      found = find(after, after.firstChild, 0);
+      if (found)
+        { return badPos(Pos(found.line, found.ch - dist), bad) }
+      else
+        { dist += after.textContent.length; }
+    }
+    for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
+      found = find(before, before.firstChild, -1);
+      if (found)
+        { return badPos(Pos(found.line, found.ch + dist$1), bad) }
+      else
+        { dist$1 += before.textContent.length; }
+    }
+  }
+
+  // TEXTAREA INPUT STYLE
+
+  var TextareaInput = function(cm) {
+    this.cm = cm;
+    // See input.poll and input.reset
+    this.prevInput = "";
+
+    // Flag that indicates whether we expect input to appear real soon
+    // now (after some event like 'keypress' or 'input') and are
+    // polling intensively.
+    this.pollingFast = false;
+    // Self-resetting timeout for the poller
+    this.polling = new Delayed();
+    // Used to work around IE issue with selection being forgotten when focus moves away from textarea
+    this.hasSelection = false;
+    this.composing = null;
+  };
+
+  TextareaInput.prototype.init = function (display) {
+      var this$1 = this;
+
+    var input = this, cm = this.cm;
+    this.createField(display);
+    var te = this.textarea;
+
+    display.wrapper.insertBefore(this.wrapper, display.wrapper.firstChild);
+
+    // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
+    if (ios) { te.style.width = "0px"; }
+
+    on(te, "input", function () {
+      if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null; }
+      input.poll();
+    });
+
+    on(te, "paste", function (e) {
+      if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+
+      cm.state.pasteIncoming = +new Date;
+      input.fastPoll();
+    });
+
+    function prepareCopyCut(e) {
+      if (signalDOMEvent(cm, e)) { return }
+      if (cm.somethingSelected()) {
+        setLastCopied({lineWise: false, text: cm.getSelections()});
+      } else if (!cm.options.lineWiseCopyCut) {
+        return
+      } else {
+        var ranges = copyableRanges(cm);
+        setLastCopied({lineWise: true, text: ranges.text});
+        if (e.type == "cut") {
+          cm.setSelections(ranges.ranges, null, sel_dontScroll);
+        } else {
+          input.prevInput = "";
+          te.value = ranges.text.join("\n");
+          selectInput(te);
+        }
+      }
+      if (e.type == "cut") { cm.state.cutIncoming = +new Date; }
+    }
+    on(te, "cut", prepareCopyCut);
+    on(te, "copy", prepareCopyCut);
+
+    on(display.scroller, "paste", function (e) {
+      if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
+      if (!te.dispatchEvent) {
+        cm.state.pasteIncoming = +new Date;
+        input.focus();
+        return
+      }
+
+      // Pass the `paste` event to the textarea so it's handled by its event listener.
+      var event = new Event("paste");
+      event.clipboardData = e.clipboardData;
+      te.dispatchEvent(event);
+    });
+
+    // Prevent normal selection in the editor (we handle our own)
+    on(display.lineSpace, "selectstart", function (e) {
+      if (!eventInWidget(display, e)) { e_preventDefault(e); }
+    });
+
+    on(te, "compositionstart", function () {
+      var start = cm.getCursor("from");
+      if (input.composing) { input.composing.range.clear(); }
+      input.composing = {
+        start: start,
+        range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
+      };
+    });
+    on(te, "compositionend", function () {
+      if (input.composing) {
+        input.poll();
+        input.composing.range.clear();
+        input.composing = null;
+      }
+    });
+  };
+
+  TextareaInput.prototype.createField = function (_display) {
+    // Wraps and hides input textarea
+    this.wrapper = hiddenTextarea();
+    // The semihidden textarea that is focused when the editor is
+    // focused, and receives input.
+    this.textarea = this.wrapper.firstChild;
+  };
+
+  TextareaInput.prototype.screenReaderLabelChanged = function (label) {
+    // Label for screenreaders, accessibility
+    if(label) {
+      this.textarea.setAttribute('aria-label', label);
+    } else {
+      this.textarea.removeAttribute('aria-label');
+    }
+  };
+
+  TextareaInput.prototype.prepareSelection = function () {
+    // Redraw the selection and/or cursor
+    var cm = this.cm, display = cm.display, doc = cm.doc;
+    var result = prepareSelection(cm);
+
+    // Move the hidden textarea near the cursor to prevent scrolling artifacts
+    if (cm.options.moveInputWithCursor) {
+      var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
+      var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
+      result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
+                                          headPos.top + lineOff.top - wrapOff.top));
+      result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
+                                           headPos.left + lineOff.left - wrapOff.left));
+    }
+
+    return result
+  };
+
+  TextareaInput.prototype.showSelection = function (drawn) {
+    var cm = this.cm, display = cm.display;
+    removeChildrenAndAdd(display.cursorDiv, drawn.cursors);
+    removeChildrenAndAdd(display.selectionDiv, drawn.selection);
+    if (drawn.teTop != null) {
+      this.wrapper.style.top = drawn.teTop + "px";
+      this.wrapper.style.left = drawn.teLeft + "px";
+    }
+  };
+
+  // Reset the input to correspond to the selection (or to be empty,
+  // when not typing and nothing is selected)
+  TextareaInput.prototype.reset = function (typing) {
+    if (this.contextMenuPending || this.composing) { return }
+    var cm = this.cm;
+    if (cm.somethingSelected()) {
+      this.prevInput = "";
+      var content = cm.getSelection();
+      this.textarea.value = content;
+      if (cm.state.focused) { selectInput(this.textarea); }
+      if (ie && ie_version >= 9) { this.hasSelection = content; }
+    } else if (!typing) {
+      this.prevInput = this.textarea.value = "";
+      if (ie && ie_version >= 9) { this.hasSelection = null; }
+    }
+  };
+
+  TextareaInput.prototype.getField = function () { return this.textarea };
+
+  TextareaInput.prototype.supportsTouch = function () { return false };
+
+  TextareaInput.prototype.focus = function () {
+    if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
+      try { this.textarea.focus(); }
+      catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
+    }
+  };
+
+  TextareaInput.prototype.blur = function () { this.textarea.blur(); };
+
+  TextareaInput.prototype.resetPosition = function () {
+    this.wrapper.style.top = this.wrapper.style.left = 0;
+  };
+
+  TextareaInput.prototype.receivedFocus = function () { this.slowPoll(); };
+
+  // Poll for input changes, using the normal rate of polling. This
+  // runs as long as the editor is focused.
+  TextareaInput.prototype.slowPoll = function () {
+      var this$1 = this;
+
+    if (this.pollingFast) { return }
+    this.polling.set(this.cm.options.pollInterval, function () {
+      this$1.poll();
+      if (this$1.cm.state.focused) { this$1.slowPoll(); }
+    });
+  };
+
+  // When an event has just come in that is likely to add or change
+  // something in the input textarea, we poll faster, to ensure that
+  // the change appears on the screen quickly.
+  TextareaInput.prototype.fastPoll = function () {
+    var missed = false, input = this;
+    input.pollingFast = true;
+    function p() {
+      var changed = input.poll();
+      if (!changed && !missed) {missed = true; input.polling.set(60, p);}
+      else {input.pollingFast = false; input.slowPoll();}
+    }
+    input.polling.set(20, p);
+  };
+
+  // Read input from the textarea, and update the document to match.
+  // When something is selected, it is present in the textarea, and
+  // selected (unless it is huge, in which case a placeholder is
+  // used). When nothing is selected, the cursor sits after previously
+  // seen text (can be empty), which is stored in prevInput (we must
+  // not reset the textarea when typing, because that breaks IME).
+  TextareaInput.prototype.poll = function () {
+      var this$1 = this;
+
+    var cm = this.cm, input = this.textarea, prevInput = this.prevInput;
+    // Since this is called a *lot*, try to bail out as cheaply as
+    // possible when it is clear that nothing happened. hasSelection
+    // will be the case when there is a lot of text in the textarea,
+    // in which case reading its value would be expensive.
+    if (this.contextMenuPending || !cm.state.focused ||
+        (hasSelection(input) && !prevInput && !this.composing) ||
+        cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
+      { return false }
+
+    var text = input.value;
+    // If nothing changed, bail.
+    if (text == prevInput && !cm.somethingSelected()) { return false }
+    // Work around nonsensical selection resetting in IE9/10, and
+    // inexplicable appearance of private area unicode characters on
+    // some key combos in Mac (#2689).
+    if (ie && ie_version >= 9 && this.hasSelection === text ||
+        mac && /[\uf700-\uf7ff]/.test(text)) {
+      cm.display.input.reset();
+      return false
+    }
+
+    if (cm.doc.sel == cm.display.selForContextMenu) {
+      var first = text.charCodeAt(0);
+      if (first == 0x200b && !prevInput) { prevInput = "\u200b"; }
+      if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
+    }
+    // Find the part of the input that is actually new
+    var same = 0, l = Math.min(prevInput.length, text.length);
+    while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) { ++same; }
+
+    runInOp(cm, function () {
+      applyTextInput(cm, text.slice(same), prevInput.length - same,
+                     null, this$1.composing ? "*compose" : null);
+
+      // Don't leave long text in the textarea, since it makes further polling slow
+      if (text.length > 1000 || text.indexOf("\n") > -1) { input.value = this$1.prevInput = ""; }
+      else { this$1.prevInput = text; }
+
+      if (this$1.composing) {
+        this$1.composing.range.clear();
+        this$1.composing.range = cm.markText(this$1.composing.start, cm.getCursor("to"),
+                                           {className: "CodeMirror-composing"});
+      }
+    });
+    return true
+  };
+
+  TextareaInput.prototype.ensurePolled = function () {
+    if (this.pollingFast && this.poll()) { this.pollingFast = false; }
+  };
+
+  TextareaInput.prototype.onKeyPress = function () {
+    if (ie && ie_version >= 9) { this.hasSelection = null; }
+    this.fastPoll();
+  };
+
+  TextareaInput.prototype.onContextMenu = function (e) {
+    var input = this, cm = input.cm, display = cm.display, te = input.textarea;
+    if (input.contextMenuPending) { input.contextMenuPending(); }
+    var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
+    if (!pos || presto) { return } // Opera is difficult.
+
+    // Reset the current text selection only if the click is done outside of the selection
+    // and 'resetSelectionOnContextMenu' option is true.
+    var reset = cm.options.resetSelectionOnContextMenu;
+    if (reset && cm.doc.sel.contains(pos) == -1)
+      { operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll); }
+
+    var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText;
+    var wrapperBox = input.wrapper.offsetParent.getBoundingClientRect();
+    input.wrapper.style.cssText = "position: static";
+    te.style.cssText = "position: absolute; width: 30px; height: 30px;\n      top: " + (e.clientY - wrapperBox.top - 5) + "px; left: " + (e.clientX - wrapperBox.left - 5) + "px;\n      z-index: 1000; background: " + (ie ? "rgba(255, 255, 255, .05)" : "transparent") + ";\n      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
+    var oldScrollY;
+    if (webkit) { oldScrollY = window.scrollY; } // Work around Chrome issue (#2712)
+    display.input.focus();
+    if (webkit) { window.scrollTo(null, oldScrollY); }
+    display.input.reset();
+    // Adds "Select all" to context menu in FF
+    if (!cm.somethingSelected()) { te.value = input.prevInput = " "; }
+    input.contextMenuPending = rehide;
+    display.selForContextMenu = cm.doc.sel;
+    clearTimeout(display.detectingSelectAll);
+
+    // Select-all will be greyed out if there's nothing to select, so
+    // this adds a zero-width space so that we can later check whether
+    // it got selected.
+    function prepareSelectAllHack() {
+      if (te.selectionStart != null) {
+        var selected = cm.somethingSelected();
+        var extval = "\u200b" + (selected ? te.value : "");
+        te.value = "\u21da"; // Used to catch context-menu undo
+        te.value = extval;
+        input.prevInput = selected ? "" : "\u200b";
+        te.selectionStart = 1; te.selectionEnd = extval.length;
+        // Re-set this, in case some other handler touched the
+        // selection in the meantime.
+        display.selForContextMenu = cm.doc.sel;
+      }
+    }
+    function rehide() {
+      if (input.contextMenuPending != rehide) { return }
+      input.contextMenuPending = false;
+      input.wrapper.style.cssText = oldWrapperCSS;
+      te.style.cssText = oldCSS;
+      if (ie && ie_version < 9) { display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos); }
+
+      // Try to detect the user choosing select-all
+      if (te.selectionStart != null) {
+        if (!ie || (ie && ie_version < 9)) { prepareSelectAllHack(); }
+        var i = 0, poll = function () {
+          if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
+              te.selectionEnd > 0 && input.prevInput == "\u200b") {
+            operation(cm, selectAll)(cm);
+          } else if (i++ < 10) {
+            display.detectingSelectAll = setTimeout(poll, 500);
+          } else {
+            display.selForContextMenu = null;
+            display.input.reset();
+          }
+        };
+        display.detectingSelectAll = setTimeout(poll, 200);
+      }
+    }
+
+    if (ie && ie_version >= 9) { prepareSelectAllHack(); }
+    if (captureRightClick) {
+      e_stop(e);
+      var mouseup = function () {
+        off(window, "mouseup", mouseup);
+        setTimeout(rehide, 20);
+      };
+      on(window, "mouseup", mouseup);
+    } else {
+      setTimeout(rehide, 50);
+    }
+  };
+
+  TextareaInput.prototype.readOnlyChanged = function (val) {
+    if (!val) { this.reset(); }
+    this.textarea.disabled = val == "nocursor";
+    this.textarea.readOnly = !!val;
+  };
+
+  TextareaInput.prototype.setUneditable = function () {};
+
+  TextareaInput.prototype.needsContentAttribute = false;
+
+  function fromTextArea(textarea, options) {
+    options = options ? copyObj(options) : {};
+    options.value = textarea.value;
+    if (!options.tabindex && textarea.tabIndex)
+      { options.tabindex = textarea.tabIndex; }
+    if (!options.placeholder && textarea.placeholder)
+      { options.placeholder = textarea.placeholder; }
+    // Set autofocus to true if this textarea is focused, or if it has
+    // autofocus and no other element is focused.
+    if (options.autofocus == null) {
+      var hasFocus = activeElt();
+      options.autofocus = hasFocus == textarea ||
+        textarea.getAttribute("autofocus") != null && hasFocus == document.body;
+    }
+
+    function save() {textarea.value = cm.getValue();}
+
+    var realSubmit;
+    if (textarea.form) {
+      on(textarea.form, "submit", save);
+      // Deplorable hack to make the submit method do the right thing.
+      if (!options.leaveSubmitMethodAlone) {
+        var form = textarea.form;
+        realSubmit = form.submit;
+        try {
+          var wrappedSubmit = form.submit = function () {
+            save();
+            form.submit = realSubmit;
+            form.submit();
+            form.submit = wrappedSubmit;
+          };
+        } catch(e) {}
+      }
+    }
+
+    options.finishInit = function (cm) {
+      cm.save = save;
+      cm.getTextArea = function () { return textarea; };
+      cm.toTextArea = function () {
+        cm.toTextArea = isNaN; // Prevent this from being ran twice
+        save();
+        textarea.parentNode.removeChild(cm.getWrapperElement());
+        textarea.style.display = "";
+        if (textarea.form) {
+          off(textarea.form, "submit", save);
+          if (!options.leaveSubmitMethodAlone && typeof textarea.form.submit == "function")
+            { textarea.form.submit = realSubmit; }
+        }
+      };
+    };
+
+    textarea.style.display = "none";
+    var cm = CodeMirror(function (node) { return textarea.parentNode.insertBefore(node, textarea.nextSibling); },
+      options);
+    return cm
+  }
+
+  function addLegacyProps(CodeMirror) {
+    CodeMirror.off = off;
+    CodeMirror.on = on;
+    CodeMirror.wheelEventPixels = wheelEventPixels;
+    CodeMirror.Doc = Doc;
+    CodeMirror.splitLines = splitLinesAuto;
+    CodeMirror.countColumn = countColumn;
+    CodeMirror.findColumn = findColumn;
+    CodeMirror.isWordChar = isWordCharBasic;
+    CodeMirror.Pass = Pass;
+    CodeMirror.signal = signal;
+    CodeMirror.Line = Line;
+    CodeMirror.changeEnd = changeEnd;
+    CodeMirror.scrollbarModel = scrollbarModel;
+    CodeMirror.Pos = Pos;
+    CodeMirror.cmpPos = cmp;
+    CodeMirror.modes = modes;
+    CodeMirror.mimeModes = mimeModes;
+    CodeMirror.resolveMode = resolveMode;
+    CodeMirror.getMode = getMode;
+    CodeMirror.modeExtensions = modeExtensions;
+    CodeMirror.extendMode = extendMode;
+    CodeMirror.copyState = copyState;
+    CodeMirror.startState = startState;
+    CodeMirror.innerMode = innerMode;
+    CodeMirror.commands = commands;
+    CodeMirror.keyMap = keyMap;
+    CodeMirror.keyName = keyName;
+    CodeMirror.isModifierKey = isModifierKey;
+    CodeMirror.lookupKey = lookupKey;
+    CodeMirror.normalizeKeyMap = normalizeKeyMap;
+    CodeMirror.StringStream = StringStream;
+    CodeMirror.SharedTextMarker = SharedTextMarker;
+    CodeMirror.TextMarker = TextMarker;
+    CodeMirror.LineWidget = LineWidget;
+    CodeMirror.e_preventDefault = e_preventDefault;
+    CodeMirror.e_stopPropagation = e_stopPropagation;
+    CodeMirror.e_stop = e_stop;
+    CodeMirror.addClass = addClass;
+    CodeMirror.contains = contains;
+    CodeMirror.rmClass = rmClass;
+    CodeMirror.keyNames = keyNames;
+  }
+
+  // EDITOR CONSTRUCTOR
+
+  defineOptions(CodeMirror);
+
+  addEditorMethods(CodeMirror);
+
+  // Set up methods on CodeMirror's prototype to redirect to the editor's document.
+  var dontDelegate = "iter insert remove copy getEditor constructor".split(" ");
+  for (var prop in Doc.prototype) { if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
+    { CodeMirror.prototype[prop] = (function(method) {
+      return function() {return method.apply(this.doc, arguments)}
+    })(Doc.prototype[prop]); } }
+
+  eventMixin(Doc);
+  CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput};
+
+  // Extra arguments are stored as the mode's dependencies, which is
+  // used by (legacy) mechanisms like loadmode.js to automatically
+  // load a mode. (Preferred mechanism is the require/define calls.)
+  CodeMirror.defineMode = function(name/*, mode, …*/) {
+    if (!CodeMirror.defaults.mode && name != "null") { CodeMirror.defaults.mode = name; }
+    defineMode.apply(this, arguments);
+  };
+
+  CodeMirror.defineMIME = defineMIME;
+
+  // Minimal default mode.
+  CodeMirror.defineMode("null", function () { return ({token: function (stream) { return stream.skipToEnd(); }}); });
+  CodeMirror.defineMIME("text/plain", "null");
+
+  // EXTENSIONS
+
+  CodeMirror.defineExtension = function (name, func) {
+    CodeMirror.prototype[name] = func;
+  };
+  CodeMirror.defineDocExtension = function (name, func) {
+    Doc.prototype[name] = func;
+  };
+
+  CodeMirror.fromTextArea = fromTextArea;
+
+  addLegacyProps(CodeMirror);
+
+  CodeMirror.version = "5.63.0";
+
+  return CodeMirror;
+
+})));
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_mode_xml_xml.js b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_mode_xml_xml.js
new file mode 100644
index 0000000..4e36106
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_mode_xml_xml.js
@@ -0,0 +1,417 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+"use strict";
+
+var htmlConfig = {
+  autoSelfClosers: {'area': true, 'base': true, 'br': true, 'col': true, 'command': true,
+                    'embed': true, 'frame': true, 'hr': true, 'img': true, 'input': true,
+                    'keygen': true, 'link': true, 'meta': true, 'param': true, 'source': true,
+                    'track': true, 'wbr': true, 'menuitem': true},
+  implicitlyClosed: {'dd': true, 'li': true, 'optgroup': true, 'option': true, 'p': true,
+                     'rp': true, 'rt': true, 'tbody': true, 'td': true, 'tfoot': true,
+                     'th': true, 'tr': true},
+  contextGrabbers: {
+    'dd': {'dd': true, 'dt': true},
+    'dt': {'dd': true, 'dt': true},
+    'li': {'li': true},
+    'option': {'option': true, 'optgroup': true},
+    'optgroup': {'optgroup': true},
+    'p': {'address': true, 'article': true, 'aside': true, 'blockquote': true, 'dir': true,
+          'div': true, 'dl': true, 'fieldset': true, 'footer': true, 'form': true,
+          'h1': true, 'h2': true, 'h3': true, 'h4': true, 'h5': true, 'h6': true,
+          'header': true, 'hgroup': true, 'hr': true, 'menu': true, 'nav': true, 'ol': true,
+          'p': true, 'pre': true, 'section': true, 'table': true, 'ul': true},
+    'rp': {'rp': true, 'rt': true},
+    'rt': {'rp': true, 'rt': true},
+    'tbody': {'tbody': true, 'tfoot': true},
+    'td': {'td': true, 'th': true},
+    'tfoot': {'tbody': true},
+    'th': {'td': true, 'th': true},
+    'thead': {'tbody': true, 'tfoot': true},
+    'tr': {'tr': true}
+  },
+  doNotIndent: {"pre": true},
+  allowUnquoted: true,
+  allowMissing: true,
+  caseFold: true
+}
+
+var xmlConfig = {
+  autoSelfClosers: {},
+  implicitlyClosed: {},
+  contextGrabbers: {},
+  doNotIndent: {},
+  allowUnquoted: false,
+  allowMissing: false,
+  allowMissingTagName: false,
+  caseFold: false
+}
+
+CodeMirror.defineMode("xml", function(editorConf, config_) {
+  var indentUnit = editorConf.indentUnit
+  var config = {}
+  var defaults = config_.htmlMode ? htmlConfig : xmlConfig
+  for (var prop in defaults) config[prop] = defaults[prop]
+  for (var prop in config_) config[prop] = config_[prop]
+
+  // Return variables for tokenizers
+  var type, setStyle;
+
+  function inText(stream, state) {
+    function chain(parser) {
+      state.tokenize = parser;
+      return parser(stream, state);
+    }
+
+    var ch = stream.next();
+    if (ch == "<") {
+      if (stream.eat("!")) {
+        if (stream.eat("[")) {
+          if (stream.match("CDATA[")) return chain(inBlock("atom", "]]>"));
+          else return null;
+        } else if (stream.match("--")) {
+          return chain(inBlock("comment", "-->"));
+        } else if (stream.match("DOCTYPE", true, true)) {
+          stream.eatWhile(/[\w\._\-]/);
+          return chain(doctype(1));
+        } else {
+          return null;
+        }
+      } else if (stream.eat("?")) {
+        stream.eatWhile(/[\w\._\-]/);
+        state.tokenize = inBlock("meta", "?>");
+        return "meta";
+      } else {
+        type = stream.eat("/") ? "closeTag" : "openTag";
+        state.tokenize = inTag;
+        return "tag bracket";
+      }
+    } else if (ch == "&") {
+      var ok;
+      if (stream.eat("#")) {
+        if (stream.eat("x")) {
+          ok = stream.eatWhile(/[a-fA-F\d]/) && stream.eat(";");
+        } else {
+          ok = stream.eatWhile(/[\d]/) && stream.eat(";");
+        }
+      } else {
+        ok = stream.eatWhile(/[\w\.\-:]/) && stream.eat(";");
+      }
+      return ok ? "atom" : "error";
+    } else {
+      stream.eatWhile(/[^&<]/);
+      return null;
+    }
+  }
+  inText.isInText = true;
+
+  function inTag(stream, state) {
+    var ch = stream.next();
+    if (ch == ">" || (ch == "/" && stream.eat(">"))) {
+      state.tokenize = inText;
+      type = ch == ">" ? "endTag" : "selfcloseTag";
+      return "tag bracket";
+    } else if (ch == "=") {
+      type = "equals";
+      return null;
+    } else if (ch == "<") {
+      state.tokenize = inText;
+      state.state = baseState;
+      state.tagName = state.tagStart = null;
+      var next = state.tokenize(stream, state);
+      return next ? next + " tag error" : "tag error";
+    } else if (/[\'\"]/.test(ch)) {
+      state.tokenize = inAttribute(ch);
+      state.stringStartCol = stream.column();
+      return state.tokenize(stream, state);
+    } else {
+      stream.match(/^[^\s\u00a0=<>\"\']*[^\s\u00a0=<>\"\'\/]/);
+      return "word";
+    }
+  }
+
+  function inAttribute(quote) {
+    var closure = function(stream, state) {
+      while (!stream.eol()) {
+        if (stream.next() == quote) {
+          state.tokenize = inTag;
+          break;
+        }
+      }
+      return "string";
+    };
+    closure.isInAttribute = true;
+    return closure;
+  }
+
+  function inBlock(style, terminator) {
+    return function(stream, state) {
+      while (!stream.eol()) {
+        if (stream.match(terminator)) {
+          state.tokenize = inText;
+          break;
+        }
+        stream.next();
+      }
+      return style;
+    }
+  }
+
+  function doctype(depth) {
+    return function(stream, state) {
+      var ch;
+      while ((ch = stream.next()) != null) {
+        if (ch == "<") {
+          state.tokenize = doctype(depth + 1);
+          return state.tokenize(stream, state);
+        } else if (ch == ">") {
+          if (depth == 1) {
+            state.tokenize = inText;
+            break;
+          } else {
+            state.tokenize = doctype(depth - 1);
+            return state.tokenize(stream, state);
+          }
+        }
+      }
+      return "meta";
+    };
+  }
+
+  function lower(tagName) {
+    return tagName && tagName.toLowerCase();
+  }
+
+  function Context(state, tagName, startOfLine) {
+    this.prev = state.context;
+    this.tagName = tagName || "";
+    this.indent = state.indented;
+    this.startOfLine = startOfLine;
+    if (config.doNotIndent.hasOwnProperty(tagName) || (state.context && state.context.noIndent))
+      this.noIndent = true;
+  }
+  function popContext(state) {
+    if (state.context) state.context = state.context.prev;
+  }
+  function maybePopContext(state, nextTagName) {
+    var parentTagName;
+    while (true) {
+      if (!state.context) {
+        return;
+      }
+      parentTagName = state.context.tagName;
+      if (!config.contextGrabbers.hasOwnProperty(lower(parentTagName)) ||
+          !config.contextGrabbers[lower(parentTagName)].hasOwnProperty(lower(nextTagName))) {
+        return;
+      }
+      popContext(state);
+    }
+  }
+
+  function baseState(type, stream, state) {
+    if (type == "openTag") {
+      state.tagStart = stream.column();
+      return tagNameState;
+    } else if (type == "closeTag") {
+      return closeTagNameState;
+    } else {
+      return baseState;
+    }
+  }
+  function tagNameState(type, stream, state) {
+    if (type == "word") {
+      state.tagName = stream.current();
+      setStyle = "tag";
+      return attrState;
+    } else if (config.allowMissingTagName && type == "endTag") {
+      setStyle = "tag bracket";
+      return attrState(type, stream, state);
+    } else {
+      setStyle = "error";
+      return tagNameState;
+    }
+  }
+  function closeTagNameState(type, stream, state) {
+    if (type == "word") {
+      var tagName = stream.current();
+      if (state.context && state.context.tagName != tagName &&
+          config.implicitlyClosed.hasOwnProperty(lower(state.context.tagName)))
+        popContext(state);
+      if ((state.context && state.context.tagName == tagName) || config.matchClosing === false) {
+        setStyle = "tag";
+        return closeState;
+      } else {
+        setStyle = "tag error";
+        return closeStateErr;
+      }
+    } else if (config.allowMissingTagName && type == "endTag") {
+      setStyle = "tag bracket";
+      return closeState(type, stream, state);
+    } else {
+      setStyle = "error";
+      return closeStateErr;
+    }
+  }
+
+  function closeState(type, _stream, state) {
+    if (type != "endTag") {
+      setStyle = "error";
+      return closeState;
+    }
+    popContext(state);
+    return baseState;
+  }
+  function closeStateErr(type, stream, state) {
+    setStyle = "error";
+    return closeState(type, stream, state);
+  }
+
+  function attrState(type, _stream, state) {
+    if (type == "word") {
+      setStyle = "attribute";
+      return attrEqState;
+    } else if (type == "endTag" || type == "selfcloseTag") {
+      var tagName = state.tagName, tagStart = state.tagStart;
+      state.tagName = state.tagStart = null;
+      if (type == "selfcloseTag" ||
+          config.autoSelfClosers.hasOwnProperty(lower(tagName))) {
+        maybePopContext(state, tagName);
+      } else {
+        maybePopContext(state, tagName);
+        state.context = new Context(state, tagName, tagStart == state.indented);
+      }
+      return baseState;
+    }
+    setStyle = "error";
+    return attrState;
+  }
+  function attrEqState(type, stream, state) {
+    if (type == "equals") return attrValueState;
+    if (!config.allowMissing) setStyle = "error";
+    return attrState(type, stream, state);
+  }
+  function attrValueState(type, stream, state) {
+    if (type == "string") return attrContinuedState;
+    if (type == "word" && config.allowUnquoted) {setStyle = "string"; return attrState;}
+    setStyle = "error";
+    return attrState(type, stream, state);
+  }
+  function attrContinuedState(type, stream, state) {
+    if (type == "string") return attrContinuedState;
+    return attrState(type, stream, state);
+  }
+
+  return {
+    startState: function(baseIndent) {
+      var state = {tokenize: inText,
+                   state: baseState,
+                   indented: baseIndent || 0,
+                   tagName: null, tagStart: null,
+                   context: null}
+      if (baseIndent != null) state.baseIndent = baseIndent
+      return state
+    },
+
+    token: function(stream, state) {
+      if (!state.tagName && stream.sol())
+        state.indented = stream.indentation();
+
+      if (stream.eatSpace()) return null;
+      type = null;
+      var style = state.tokenize(stream, state);
+      if ((style || type) && style != "comment") {
+        setStyle = null;
+        state.state = state.state(type || style, stream, state);
+        if (setStyle)
+          style = setStyle == "error" ? style + " error" : setStyle;
+      }
+      return style;
+    },
+
+    indent: function(state, textAfter, fullLine) {
+      var context = state.context;
+      // Indent multi-line strings (e.g. css).
+      if (state.tokenize.isInAttribute) {
+        if (state.tagStart == state.indented)
+          return state.stringStartCol + 1;
+        else
+          return state.indented + indentUnit;
+      }
+      if (context && context.noIndent) return CodeMirror.Pass;
+      if (state.tokenize != inTag && state.tokenize != inText)
+        return fullLine ? fullLine.match(/^(\s*)/)[0].length : 0;
+      // Indent the starts of attribute names.
+      if (state.tagName) {
+        if (config.multilineTagIndentPastTag !== false)
+          return state.tagStart + state.tagName.length + 2;
+        else
+          return state.tagStart + indentUnit * (config.multilineTagIndentFactor || 1);
+      }
+      if (config.alignCDATA && /$/,
+    blockCommentStart: "",
+
+    configuration: config.htmlMode ? "html" : "xml",
+    helperType: config.htmlMode ? "html" : "xml",
+
+    skipAttribute: function(state) {
+      if (state.state == attrValueState)
+        state.state = attrState
+    },
+
+    xmlCurrentTag: function(state) {
+      return state.tagName ? {name: state.tagName, close: state.type == "closeTag"} : null
+    },
+
+    xmlCurrentContext: function(state) {
+      var context = []
+      for (var cx = state.context; cx; cx = cx.prev)
+        context.push(cx.tagName)
+      return context.reverse()
+    }
+  };
+});
+
+CodeMirror.defineMIME("text/xml", "xml");
+CodeMirror.defineMIME("application/xml", "xml");
+if (!CodeMirror.mimeModes.hasOwnProperty("text/html"))
+  CodeMirror.defineMIME("text/html", {name: "xml", htmlMode: true});
+
+});
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_theme_material-darker.css b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_theme_material-darker.css
new file mode 100644
index 0000000..45b64ef
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_theme_material-darker.css
@@ -0,0 +1,135 @@
+/*
+  Name:       material
+  Author:     Mattia Astorino (http://github.com/equinusocio)
+  Website:    https://material-theme.site/
+*/
+
+.cm-s-material-darker.CodeMirror {
+  background-color: #212121;
+  color: #EEFFFF;
+}
+
+.cm-s-material-darker .CodeMirror-gutters {
+  background: #212121;
+  color: #545454;
+  border: none;
+}
+
+.cm-s-material-darker .CodeMirror-guttermarker,
+.cm-s-material-darker .CodeMirror-guttermarker-subtle,
+.cm-s-material-darker .CodeMirror-linenumber {
+  color: #545454;
+}
+
+.cm-s-material-darker .CodeMirror-cursor {
+  border-left: 1px solid #FFCC00;
+}
+
+.cm-s-material-darker div.CodeMirror-selected {
+  background: rgba(97, 97, 97, 0.2);
+}
+
+.cm-s-material-darker.CodeMirror-focused div.CodeMirror-selected {
+  background: rgba(97, 97, 97, 0.2);
+}
+
+.cm-s-material-darker .CodeMirror-line::selection,
+.cm-s-material-darker .CodeMirror-line>span::selection,
+.cm-s-material-darker .CodeMirror-line>span>span::selection {
+  background: rgba(128, 203, 196, 0.2);
+}
+
+.cm-s-material-darker .CodeMirror-line::-moz-selection,
+.cm-s-material-darker .CodeMirror-line>span::-moz-selection,
+.cm-s-material-darker .CodeMirror-line>span>span::-moz-selection {
+  background: rgba(128, 203, 196, 0.2);
+}
+
+.cm-s-material-darker .CodeMirror-activeline-background {
+  background: rgba(0, 0, 0, 0.5);
+}
+
+.cm-s-material-darker .cm-keyword {
+  color: #C792EA;
+}
+
+.cm-s-material-darker .cm-operator {
+  color: #89DDFF;
+}
+
+.cm-s-material-darker .cm-variable-2 {
+  color: #EEFFFF;
+}
+
+.cm-s-material-darker .cm-variable-3,
+.cm-s-material-darker .cm-type {
+  color: #f07178;
+}
+
+.cm-s-material-darker .cm-builtin {
+  color: #FFCB6B;
+}
+
+.cm-s-material-darker .cm-atom {
+  color: #F78C6C;
+}
+
+.cm-s-material-darker .cm-number {
+  color: #FF5370;
+}
+
+.cm-s-material-darker .cm-def {
+  color: #82AAFF;
+}
+
+.cm-s-material-darker .cm-string {
+  color: #C3E88D;
+}
+
+.cm-s-material-darker .cm-string-2 {
+  color: #f07178;
+}
+
+.cm-s-material-darker .cm-comment {
+  color: #545454;
+}
+
+.cm-s-material-darker .cm-variable {
+  color: #f07178;
+}
+
+.cm-s-material-darker .cm-tag {
+  color: #FF5370;
+}
+
+.cm-s-material-darker .cm-meta {
+  color: #FFCB6B;
+}
+
+.cm-s-material-darker .cm-attribute {
+  color: #C792EA;
+}
+
+.cm-s-material-darker .cm-property {
+  color: #C792EA;
+}
+
+.cm-s-material-darker .cm-qualifier {
+  color: #DECB6B;
+}
+
+.cm-s-material-darker .cm-variable-3,
+.cm-s-material-darker .cm-type {
+  color: #DECB6B;
+}
+
+
+.cm-s-material-darker .cm-error {
+  color: rgba(255, 255, 255, 1.0);
+  background-color: #FF5370;
+}
+
+.cm-s-material-darker .CodeMirror-matchingbracket {
+  text-decoration: underline;
+  color: white !important;
+}
\ No newline at end of file
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_theme_nord.css b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_theme_nord.css
new file mode 100644
index 0000000..41a8ad7
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_codemirror_5.63.0_theme_nord.css
@@ -0,0 +1,42 @@
+/* Based on arcticicestudio's Nord theme */
+/* https://github.com/arcticicestudio/nord */
+
+.cm-s-nord.CodeMirror { background: #2e3440; color: #d8dee9; }
+.cm-s-nord div.CodeMirror-selected { background: #434c5e; }
+.cm-s-nord .CodeMirror-line::selection, .cm-s-nord .CodeMirror-line > span::selection, .cm-s-nord .CodeMirror-line > span > span::selection { background: #3b4252; }
+.cm-s-nord .CodeMirror-line::-moz-selection, .cm-s-nord .CodeMirror-line > span::-moz-selection, .cm-s-nord .CodeMirror-line > span > span::-moz-selection { background: #3b4252; }
+.cm-s-nord .CodeMirror-gutters { background: #2e3440; border-right: 0px; }
+.cm-s-nord .CodeMirror-guttermarker { color: #4c566a; }
+.cm-s-nord .CodeMirror-guttermarker-subtle { color: #4c566a; }
+.cm-s-nord .CodeMirror-linenumber { color: #4c566a; }
+.cm-s-nord .CodeMirror-cursor { border-left: 1px solid #f8f8f0; }
+
+.cm-s-nord span.cm-comment { color: #4c566a; }
+.cm-s-nord span.cm-atom { color: #b48ead; }
+.cm-s-nord span.cm-number { color: #b48ead; }
+
+.cm-s-nord span.cm-comment.cm-attribute { color: #97b757; }
+.cm-s-nord span.cm-comment.cm-def { color: #bc9262; }
+.cm-s-nord span.cm-comment.cm-tag { color: #bc6283; }
+.cm-s-nord span.cm-comment.cm-type { color: #5998a6; }
+
+.cm-s-nord span.cm-property, .cm-s-nord span.cm-attribute { color: #8FBCBB; }
+.cm-s-nord span.cm-keyword { color: #81A1C1; }
+.cm-s-nord span.cm-builtin { color: #81A1C1; }
+.cm-s-nord span.cm-string { color: #A3BE8C; }
+
+.cm-s-nord span.cm-variable { color: #d8dee9; }
+.cm-s-nord span.cm-variable-2 { color: #d8dee9; }
+.cm-s-nord span.cm-variable-3, .cm-s-nord span.cm-type { color: #d8dee9; }
+.cm-s-nord span.cm-def { color: #8FBCBB; }
+.cm-s-nord span.cm-bracket { color: #81A1C1; }
+.cm-s-nord span.cm-tag { color: #bf616a; }
+.cm-s-nord span.cm-header { color: #b48ead; }
+.cm-s-nord span.cm-link { color: #b48ead; }
+.cm-s-nord span.cm-error { background: #bf616a; color: #f8f8f0; }
+
+.cm-s-nord .CodeMirror-activeline-background { background: #3b4252; }
+.cm-s-nord .CodeMirror-matchingbracket {
+  text-decoration: underline;
+  color: white !important;
+}
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_font-awesome_6.0.0_css_all.css b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_font-awesome_6.0.0_css_all.css
new file mode 100644
index 0000000..65f9e56
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_font-awesome_6.0.0_css_all.css
@@ -0,0 +1,7003 @@
+/*!
+ * Font Awesome Free 6.0.0 by @fontawesome - https://fontawesome.com
+ * License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License)
+ * Copyright 2022 Fonticons, Inc.
+ */
+.fa {
+  font-family: var(--fa-style-family, "Font Awesome 6 Free");
+  font-weight: var(--fa-style, 900); }
+
+.fa,
+.fas,
+.fa-solid,
+.far,
+.fa-regular,
+.fal,
+.fa-light,
+.fat,
+.fa-thin,
+.fad,
+.fa-duotone,
+.fab,
+.fa-brands {
+  -moz-osx-font-smoothing: grayscale;
+  -webkit-font-smoothing: antialiased;
+  display: var(--fa-display, inline-block);
+  font-style: normal;
+  font-variant: normal;
+  line-height: 1;
+  text-rendering: auto; }
+
+.fa-1x {
+  font-size: 1em; }
+
+.fa-2x {
+  font-size: 2em; }
+
+.fa-3x {
+  font-size: 3em; }
+
+.fa-4x {
+  font-size: 4em; }
+
+.fa-5x {
+  font-size: 5em; }
+
+.fa-6x {
+  font-size: 6em; }
+
+.fa-7x {
+  font-size: 7em; }
+
+.fa-8x {
+  font-size: 8em; }
+
+.fa-9x {
+  font-size: 9em; }
+
+.fa-10x {
+  font-size: 10em; }
+
+.fa-2xs {
+  font-size: 0.625em;
+  line-height: 0.1em;
+  vertical-align: 0.225em; }
+
+.fa-xs {
+  font-size: 0.75em;
+  line-height: 0.08333em;
+  vertical-align: 0.125em; }
+
+.fa-sm {
+  font-size: 0.875em;
+  line-height: 0.07143em;
+  vertical-align: 0.05357em; }
+
+.fa-lg {
+  font-size: 1.25em;
+  line-height: 0.05em;
+  vertical-align: -0.075em; }
+
+.fa-xl {
+  font-size: 1.5em;
+  line-height: 0.04167em;
+  vertical-align: -0.125em; }
+
+.fa-2xl {
+  font-size: 2em;
+  line-height: 0.03125em;
+  vertical-align: -0.1875em; }
+
+.fa-fw {
+  text-align: center;
+  width: 1.25em; }
+
+.fa-ul {
+  list-style-type: none;
+  margin-left: var(--fa-li-margin, 2.5em);
+  padding-left: 0; }
+  .fa-ul > li {
+    position: relative; }
+
+.fa-li {
+  left: calc(var(--fa-li-width, 2em) * -1);
+  position: absolute;
+  text-align: center;
+  width: var(--fa-li-width, 2em);
+  line-height: inherit; }
+
+.fa-border {
+  border-color: var(--fa-border-color, #eee);
+  border-radius: var(--fa-border-radius, 0.1em);
+  border-style: var(--fa-border-style, solid);
+  border-width: var(--fa-border-width, 0.08em);
+  padding: var(--fa-border-padding, 0.2em 0.25em 0.15em); }
+
+.fa-pull-left {
+  float: left;
+  margin-right: var(--fa-pull-margin, 0.3em); }
+
+.fa-pull-right {
+  float: right;
+  margin-left: var(--fa-pull-margin, 0.3em); }
+
+.fa-beat {
+  -webkit-animation-name: fa-beat;
+          animation-name: fa-beat;
+  -webkit-animation-delay: var(--fa-animation-delay, 0);
+          animation-delay: var(--fa-animation-delay, 0);
+  -webkit-animation-direction: var(--fa-animation-direction, normal);
+          animation-direction: var(--fa-animation-direction, normal);
+  -webkit-animation-duration: var(--fa-animation-duration, 1s);
+          animation-duration: var(--fa-animation-duration, 1s);
+  -webkit-animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+          animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+  -webkit-animation-timing-function: var(--fa-animation-timing, ease-in-out);
+          animation-timing-function: var(--fa-animation-timing, ease-in-out); }
+
+.fa-bounce {
+  -webkit-animation-name: fa-bounce;
+          animation-name: fa-bounce;
+  -webkit-animation-delay: var(--fa-animation-delay, 0);
+          animation-delay: var(--fa-animation-delay, 0);
+  -webkit-animation-direction: var(--fa-animation-direction, normal);
+          animation-direction: var(--fa-animation-direction, normal);
+  -webkit-animation-duration: var(--fa-animation-duration, 1s);
+          animation-duration: var(--fa-animation-duration, 1s);
+  -webkit-animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+          animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+  -webkit-animation-timing-function: var(--fa-animation-timing, cubic-bezier(0.28, 0.84, 0.42, 1));
+          animation-timing-function: var(--fa-animation-timing, cubic-bezier(0.28, 0.84, 0.42, 1)); }
+
+.fa-fade {
+  -webkit-animation-name: fa-fade;
+          animation-name: fa-fade;
+  -webkit-animation-delay: var(--fa-animation-delay, 0);
+          animation-delay: var(--fa-animation-delay, 0);
+  -webkit-animation-direction: var(--fa-animation-direction, normal);
+          animation-direction: var(--fa-animation-direction, normal);
+  -webkit-animation-duration: var(--fa-animation-duration, 1s);
+          animation-duration: var(--fa-animation-duration, 1s);
+  -webkit-animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+          animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+  -webkit-animation-timing-function: var(--fa-animation-timing, cubic-bezier(0.4, 0, 0.6, 1));
+          animation-timing-function: var(--fa-animation-timing, cubic-bezier(0.4, 0, 0.6, 1)); }
+
+.fa-beat-fade {
+  -webkit-animation-name: fa-beat-fade;
+          animation-name: fa-beat-fade;
+  -webkit-animation-delay: var(--fa-animation-delay, 0);
+          animation-delay: var(--fa-animation-delay, 0);
+  -webkit-animation-direction: var(--fa-animation-direction, normal);
+          animation-direction: var(--fa-animation-direction, normal);
+  -webkit-animation-duration: var(--fa-animation-duration, 1s);
+          animation-duration: var(--fa-animation-duration, 1s);
+  -webkit-animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+          animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+  -webkit-animation-timing-function: var(--fa-animation-timing, cubic-bezier(0.4, 0, 0.6, 1));
+          animation-timing-function: var(--fa-animation-timing, cubic-bezier(0.4, 0, 0.6, 1)); }
+
+.fa-flip {
+  -webkit-animation-name: fa-flip;
+          animation-name: fa-flip;
+  -webkit-animation-delay: var(--fa-animation-delay, 0);
+          animation-delay: var(--fa-animation-delay, 0);
+  -webkit-animation-direction: var(--fa-animation-direction, normal);
+          animation-direction: var(--fa-animation-direction, normal);
+  -webkit-animation-duration: var(--fa-animation-duration, 1s);
+          animation-duration: var(--fa-animation-duration, 1s);
+  -webkit-animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+          animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+  -webkit-animation-timing-function: var(--fa-animation-timing, ease-in-out);
+          animation-timing-function: var(--fa-animation-timing, ease-in-out); }
+
+.fa-shake {
+  -webkit-animation-name: fa-shake;
+          animation-name: fa-shake;
+  -webkit-animation-delay: var(--fa-animation-delay, 0);
+          animation-delay: var(--fa-animation-delay, 0);
+  -webkit-animation-direction: var(--fa-animation-direction, normal);
+          animation-direction: var(--fa-animation-direction, normal);
+  -webkit-animation-duration: var(--fa-animation-duration, 1s);
+          animation-duration: var(--fa-animation-duration, 1s);
+  -webkit-animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+          animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+  -webkit-animation-timing-function: var(--fa-animation-timing, linear);
+          animation-timing-function: var(--fa-animation-timing, linear); }
+
+.fa-spin {
+  -webkit-animation-name: fa-spin;
+          animation-name: fa-spin;
+  -webkit-animation-delay: var(--fa-animation-delay, 0);
+          animation-delay: var(--fa-animation-delay, 0);
+  -webkit-animation-direction: var(--fa-animation-direction, normal);
+          animation-direction: var(--fa-animation-direction, normal);
+  -webkit-animation-duration: var(--fa-animation-duration, 2s);
+          animation-duration: var(--fa-animation-duration, 2s);
+  -webkit-animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+          animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+  -webkit-animation-timing-function: var(--fa-animation-timing, linear);
+          animation-timing-function: var(--fa-animation-timing, linear); }
+
+.fa-spin-reverse {
+  --fa-animation-direction: reverse; }
+
+.fa-pulse,
+.fa-spin-pulse {
+  -webkit-animation-name: fa-spin;
+          animation-name: fa-spin;
+  -webkit-animation-direction: var(--fa-animation-direction, normal);
+          animation-direction: var(--fa-animation-direction, normal);
+  -webkit-animation-duration: var(--fa-animation-duration, 1s);
+          animation-duration: var(--fa-animation-duration, 1s);
+  -webkit-animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+          animation-iteration-count: var(--fa-animation-iteration-count, infinite);
+  -webkit-animation-timing-function: var(--fa-animation-timing, steps(8));
+          animation-timing-function: var(--fa-animation-timing, steps(8)); }
+
+@media (prefers-reduced-motion: reduce) {
+  .fa-beat,
+  .fa-bounce,
+  .fa-fade,
+  .fa-beat-fade,
+  .fa-flip,
+  .fa-pulse,
+  .fa-shake,
+  .fa-spin,
+  .fa-spin-pulse {
+    -webkit-animation-delay: -1ms;
+            animation-delay: -1ms;
+    -webkit-animation-duration: 1ms;
+            animation-duration: 1ms;
+    -webkit-animation-iteration-count: 1;
+            animation-iteration-count: 1;
+    transition-delay: 0s;
+    transition-duration: 0s; } }
+
+@-webkit-keyframes fa-beat {
+  0%, 90% {
+    -webkit-transform: scale(1);
+            transform: scale(1); }
+  45% {
+    -webkit-transform: scale(var(--fa-beat-scale, 1.25));
+            transform: scale(var(--fa-beat-scale, 1.25)); } }
+
+@keyframes fa-beat {
+  0%, 90% {
+    -webkit-transform: scale(1);
+            transform: scale(1); }
+  45% {
+    -webkit-transform: scale(var(--fa-beat-scale, 1.25));
+            transform: scale(var(--fa-beat-scale, 1.25)); } }
+
+@-webkit-keyframes fa-bounce {
+  0% {
+    -webkit-transform: scale(1, 1) translateY(0);
+            transform: scale(1, 1) translateY(0); }
+  10% {
+    -webkit-transform: scale(var(--fa-bounce-start-scale-x, 1.1), var(--fa-bounce-start-scale-y, 0.9)) translateY(0);
+            transform: scale(var(--fa-bounce-start-scale-x, 1.1), var(--fa-bounce-start-scale-y, 0.9)) translateY(0); }
+  30% {
+    -webkit-transform: scale(var(--fa-bounce-jump-scale-x, 0.9), var(--fa-bounce-jump-scale-y, 1.1)) translateY(var(--fa-bounce-height, -0.5em));
+            transform: scale(var(--fa-bounce-jump-scale-x, 0.9), var(--fa-bounce-jump-scale-y, 1.1)) translateY(var(--fa-bounce-height, -0.5em)); }
+  50% {
+    -webkit-transform: scale(var(--fa-bounce-land-scale-x, 1.05), var(--fa-bounce-land-scale-y, 0.95)) translateY(0);
+            transform: scale(var(--fa-bounce-land-scale-x, 1.05), var(--fa-bounce-land-scale-y, 0.95)) translateY(0); }
+  57% {
+    -webkit-transform: scale(1, 1) translateY(var(--fa-bounce-rebound, -0.125em));
+            transform: scale(1, 1) translateY(var(--fa-bounce-rebound, -0.125em)); }
+  64% {
+    -webkit-transform: scale(1, 1) translateY(0);
+            transform: scale(1, 1) translateY(0); }
+  100% {
+    -webkit-transform: scale(1, 1) translateY(0);
+            transform: scale(1, 1) translateY(0); } }
+
+@keyframes fa-bounce {
+  0% {
+    -webkit-transform: scale(1, 1) translateY(0);
+            transform: scale(1, 1) translateY(0); }
+  10% {
+    -webkit-transform: scale(var(--fa-bounce-start-scale-x, 1.1), var(--fa-bounce-start-scale-y, 0.9)) translateY(0);
+            transform: scale(var(--fa-bounce-start-scale-x, 1.1), var(--fa-bounce-start-scale-y, 0.9)) translateY(0); }
+  30% {
+    -webkit-transform: scale(var(--fa-bounce-jump-scale-x, 0.9), var(--fa-bounce-jump-scale-y, 1.1)) translateY(var(--fa-bounce-height, -0.5em));
+            transform: scale(var(--fa-bounce-jump-scale-x, 0.9), var(--fa-bounce-jump-scale-y, 1.1)) translateY(var(--fa-bounce-height, -0.5em)); }
+  50% {
+    -webkit-transform: scale(var(--fa-bounce-land-scale-x, 1.05), var(--fa-bounce-land-scale-y, 0.95)) translateY(0);
+            transform: scale(var(--fa-bounce-land-scale-x, 1.05), var(--fa-bounce-land-scale-y, 0.95)) translateY(0); }
+  57% {
+    -webkit-transform: scale(1, 1) translateY(var(--fa-bounce-rebound, -0.125em));
+            transform: scale(1, 1) translateY(var(--fa-bounce-rebound, -0.125em)); }
+  64% {
+    -webkit-transform: scale(1, 1) translateY(0);
+            transform: scale(1, 1) translateY(0); }
+  100% {
+    -webkit-transform: scale(1, 1) translateY(0);
+            transform: scale(1, 1) translateY(0); } }
+
+@-webkit-keyframes fa-fade {
+  50% {
+    opacity: var(--fa-fade-opacity, 0.4); } }
+
+@keyframes fa-fade {
+  50% {
+    opacity: var(--fa-fade-opacity, 0.4); } }
+
+@-webkit-keyframes fa-beat-fade {
+  0%, 100% {
+    opacity: var(--fa-beat-fade-opacity, 0.4);
+    -webkit-transform: scale(1);
+            transform: scale(1); }
+  50% {
+    opacity: 1;
+    -webkit-transform: scale(var(--fa-beat-fade-scale, 1.125));
+            transform: scale(var(--fa-beat-fade-scale, 1.125)); } }
+
+@keyframes fa-beat-fade {
+  0%, 100% {
+    opacity: var(--fa-beat-fade-opacity, 0.4);
+    -webkit-transform: scale(1);
+            transform: scale(1); }
+  50% {
+    opacity: 1;
+    -webkit-transform: scale(var(--fa-beat-fade-scale, 1.125));
+            transform: scale(var(--fa-beat-fade-scale, 1.125)); } }
+
+@-webkit-keyframes fa-flip {
+  50% {
+    -webkit-transform: rotate3d(var(--fa-flip-x, 0), var(--fa-flip-y, 1), var(--fa-flip-z, 0), var(--fa-flip-angle, -180deg));
+            transform: rotate3d(var(--fa-flip-x, 0), var(--fa-flip-y, 1), var(--fa-flip-z, 0), var(--fa-flip-angle, -180deg)); } }
+
+@keyframes fa-flip {
+  50% {
+    -webkit-transform: rotate3d(var(--fa-flip-x, 0), var(--fa-flip-y, 1), var(--fa-flip-z, 0), var(--fa-flip-angle, -180deg));
+            transform: rotate3d(var(--fa-flip-x, 0), var(--fa-flip-y, 1), var(--fa-flip-z, 0), var(--fa-flip-angle, -180deg)); } }
+
+@-webkit-keyframes fa-shake {
+  0% {
+    -webkit-transform: rotate(-15deg);
+            transform: rotate(-15deg); }
+  4% {
+    -webkit-transform: rotate(15deg);
+            transform: rotate(15deg); }
+  8%, 24% {
+    -webkit-transform: rotate(-18deg);
+            transform: rotate(-18deg); }
+  12%, 28% {
+    -webkit-transform: rotate(18deg);
+            transform: rotate(18deg); }
+  16% {
+    -webkit-transform: rotate(-22deg);
+            transform: rotate(-22deg); }
+  20% {
+    -webkit-transform: rotate(22deg);
+            transform: rotate(22deg); }
+  32% {
+    -webkit-transform: rotate(-12deg);
+            transform: rotate(-12deg); }
+  36% {
+    -webkit-transform: rotate(12deg);
+            transform: rotate(12deg); }
+  40%, 100% {
+    -webkit-transform: rotate(0deg);
+            transform: rotate(0deg); } }
+
+@keyframes fa-shake {
+  0% {
+    -webkit-transform: rotate(-15deg);
+            transform: rotate(-15deg); }
+  4% {
+    -webkit-transform: rotate(15deg);
+            transform: rotate(15deg); }
+  8%, 24% {
+    -webkit-transform: rotate(-18deg);
+            transform: rotate(-18deg); }
+  12%, 28% {
+    -webkit-transform: rotate(18deg);
+            transform: rotate(18deg); }
+  16% {
+    -webkit-transform: rotate(-22deg);
+            transform: rotate(-22deg); }
+  20% {
+    -webkit-transform: rotate(22deg);
+            transform: rotate(22deg); }
+  32% {
+    -webkit-transform: rotate(-12deg);
+            transform: rotate(-12deg); }
+  36% {
+    -webkit-transform: rotate(12deg);
+            transform: rotate(12deg); }
+  40%, 100% {
+    -webkit-transform: rotate(0deg);
+            transform: rotate(0deg); } }
+
+@-webkit-keyframes fa-spin {
+  0% {
+    -webkit-transform: rotate(0deg);
+            transform: rotate(0deg); }
+  100% {
+    -webkit-transform: rotate(360deg);
+            transform: rotate(360deg); } }
+
+@keyframes fa-spin {
+  0% {
+    -webkit-transform: rotate(0deg);
+            transform: rotate(0deg); }
+  100% {
+    -webkit-transform: rotate(360deg);
+            transform: rotate(360deg); } }
+
+.fa-rotate-90 {
+  -webkit-transform: rotate(90deg);
+          transform: rotate(90deg); }
+
+.fa-rotate-180 {
+  -webkit-transform: rotate(180deg);
+          transform: rotate(180deg); }
+
+.fa-rotate-270 {
+  -webkit-transform: rotate(270deg);
+          transform: rotate(270deg); }
+
+.fa-flip-horizontal {
+  -webkit-transform: scale(-1, 1);
+          transform: scale(-1, 1); }
+
+.fa-flip-vertical {
+  -webkit-transform: scale(1, -1);
+          transform: scale(1, -1); }
+
+.fa-flip-both,
+.fa-flip-horizontal.fa-flip-vertical {
+  -webkit-transform: scale(-1, -1);
+          transform: scale(-1, -1); }
+
+.fa-rotate-by {
+  -webkit-transform: rotate(var(--fa-rotate-angle, none));
+          transform: rotate(var(--fa-rotate-angle, none)); }
+
+.fa-stack {
+  display: inline-block;
+  height: 2em;
+  line-height: 2em;
+  position: relative;
+  vertical-align: middle;
+  width: 2.5em; }
+
+.fa-stack-1x,
+.fa-stack-2x {
+  left: 0;
+  position: absolute;
+  text-align: center;
+  width: 100%;
+  z-index: var(--fa-stack-z-index, auto); }
+
+.fa-stack-1x {
+  line-height: inherit; }
+
+.fa-stack-2x {
+  font-size: 2em; }
+
+.fa-inverse {
+  color: var(--fa-inverse, #fff); }
+
+/* Font Awesome uses the Unicode Private Use Area (PUA) to ensure screen
+readers do not read off random characters that represent icons */
+.fa-0::before {
+  content: "\30"; }
+
+.fa-1::before {
+  content: "\31"; }
+
+.fa-2::before {
+  content: "\32"; }
+
+.fa-3::before {
+  content: "\33"; }
+
+.fa-4::before {
+  content: "\34"; }
+
+.fa-5::before {
+  content: "\35"; }
+
+.fa-6::before {
+  content: "\36"; }
+
+.fa-7::before {
+  content: "\37"; }
+
+.fa-8::before {
+  content: "\38"; }
+
+.fa-9::before {
+  content: "\39"; }
+
+.fa-a::before {
+  content: "\41"; }
+
+.fa-address-book::before {
+  content: "\f2b9"; }
+
+.fa-contact-book::before {
+  content: "\f2b9"; }
+
+.fa-address-card::before {
+  content: "\f2bb"; }
+
+.fa-contact-card::before {
+  content: "\f2bb"; }
+
+.fa-vcard::before {
+  content: "\f2bb"; }
+
+.fa-align-center::before {
+  content: "\f037"; }
+
+.fa-align-justify::before {
+  content: "\f039"; }
+
+.fa-align-left::before {
+  content: "\f036"; }
+
+.fa-align-right::before {
+  content: "\f038"; }
+
+.fa-anchor::before {
+  content: "\f13d"; }
+
+.fa-angle-down::before {
+  content: "\f107"; }
+
+.fa-angle-left::before {
+  content: "\f104"; }
+
+.fa-angle-right::before {
+  content: "\f105"; }
+
+.fa-angle-up::before {
+  content: "\f106"; }
+
+.fa-angles-down::before {
+  content: "\f103"; }
+
+.fa-angle-double-down::before {
+  content: "\f103"; }
+
+.fa-angles-left::before {
+  content: "\f100"; }
+
+.fa-angle-double-left::before {
+  content: "\f100"; }
+
+.fa-angles-right::before {
+  content: "\f101"; }
+
+.fa-angle-double-right::before {
+  content: "\f101"; }
+
+.fa-angles-up::before {
+  content: "\f102"; }
+
+.fa-angle-double-up::before {
+  content: "\f102"; }
+
+.fa-ankh::before {
+  content: "\f644"; }
+
+.fa-apple-whole::before {
+  content: "\f5d1"; }
+
+.fa-apple-alt::before {
+  content: "\f5d1"; }
+
+.fa-archway::before {
+  content: "\f557"; }
+
+.fa-arrow-down::before {
+  content: "\f063"; }
+
+.fa-arrow-down-1-9::before {
+  content: "\f162"; }
+
+.fa-sort-numeric-asc::before {
+  content: "\f162"; }
+
+.fa-sort-numeric-down::before {
+  content: "\f162"; }
+
+.fa-arrow-down-9-1::before {
+  content: "\f886"; }
+
+.fa-sort-numeric-desc::before {
+  content: "\f886"; }
+
+.fa-sort-numeric-down-alt::before {
+  content: "\f886"; }
+
+.fa-arrow-down-a-z::before {
+  content: "\f15d"; }
+
+.fa-sort-alpha-asc::before {
+  content: "\f15d"; }
+
+.fa-sort-alpha-down::before {
+  content: "\f15d"; }
+
+.fa-arrow-down-long::before {
+  content: "\f175"; }
+
+.fa-long-arrow-down::before {
+  content: "\f175"; }
+
+.fa-arrow-down-short-wide::before {
+  content: "\f884"; }
+
+.fa-sort-amount-desc::before {
+  content: "\f884"; }
+
+.fa-sort-amount-down-alt::before {
+  content: "\f884"; }
+
+.fa-arrow-down-wide-short::before {
+  content: "\f160"; }
+
+.fa-sort-amount-asc::before {
+  content: "\f160"; }
+
+.fa-sort-amount-down::before {
+  content: "\f160"; }
+
+.fa-arrow-down-z-a::before {
+  content: "\f881"; }
+
+.fa-sort-alpha-desc::before {
+  content: "\f881"; }
+
+.fa-sort-alpha-down-alt::before {
+  content: "\f881"; }
+
+.fa-arrow-left::before {
+  content: "\f060"; }
+
+.fa-arrow-left-long::before {
+  content: "\f177"; }
+
+.fa-long-arrow-left::before {
+  content: "\f177"; }
+
+.fa-arrow-pointer::before {
+  content: "\f245"; }
+
+.fa-mouse-pointer::before {
+  content: "\f245"; }
+
+.fa-arrow-right::before {
+  content: "\f061"; }
+
+.fa-arrow-right-arrow-left::before {
+  content: "\f0ec"; }
+
+.fa-exchange::before {
+  content: "\f0ec"; }
+
+.fa-arrow-right-from-bracket::before {
+  content: "\f08b"; }
+
+.fa-sign-out::before {
+  content: "\f08b"; }
+
+.fa-arrow-right-long::before {
+  content: "\f178"; }
+
+.fa-long-arrow-right::before {
+  content: "\f178"; }
+
+.fa-arrow-right-to-bracket::before {
+  content: "\f090"; }
+
+.fa-sign-in::before {
+  content: "\f090"; }
+
+.fa-arrow-rotate-left::before {
+  content: "\f0e2"; }
+
+.fa-arrow-left-rotate::before {
+  content: "\f0e2"; }
+
+.fa-arrow-rotate-back::before {
+  content: "\f0e2"; }
+
+.fa-arrow-rotate-backward::before {
+  content: "\f0e2"; }
+
+.fa-undo::before {
+  content: "\f0e2"; }
+
+.fa-arrow-rotate-right::before {
+  content: "\f01e"; }
+
+.fa-arrow-right-rotate::before {
+  content: "\f01e"; }
+
+.fa-arrow-rotate-forward::before {
+  content: "\f01e"; }
+
+.fa-redo::before {
+  content: "\f01e"; }
+
+.fa-arrow-trend-down::before {
+  content: "\e097"; }
+
+.fa-arrow-trend-up::before {
+  content: "\e098"; }
+
+.fa-arrow-turn-down::before {
+  content: "\f149"; }
+
+.fa-level-down::before {
+  content: "\f149"; }
+
+.fa-arrow-turn-up::before {
+  content: "\f148"; }
+
+.fa-level-up::before {
+  content: "\f148"; }
+
+.fa-arrow-up::before {
+  content: "\f062"; }
+
+.fa-arrow-up-1-9::before {
+  content: "\f163"; }
+
+.fa-sort-numeric-up::before {
+  content: "\f163"; }
+
+.fa-arrow-up-9-1::before {
+  content: "\f887"; }
+
+.fa-sort-numeric-up-alt::before {
+  content: "\f887"; }
+
+.fa-arrow-up-a-z::before {
+  content: "\f15e"; }
+
+.fa-sort-alpha-up::before {
+  content: "\f15e"; }
+
+.fa-arrow-up-from-bracket::before {
+  content: "\e09a"; }
+
+.fa-arrow-up-long::before {
+  content: "\f176"; }
+
+.fa-long-arrow-up::before {
+  content: "\f176"; }
+
+.fa-arrow-up-right-from-square::before {
+  content: "\f08e"; }
+
+.fa-external-link::before {
+  content: "\f08e"; }
+
+.fa-arrow-up-short-wide::before {
+  content: "\f885"; }
+
+.fa-sort-amount-up-alt::before {
+  content: "\f885"; }
+
+.fa-arrow-up-wide-short::before {
+  content: "\f161"; }
+
+.fa-sort-amount-up::before {
+  content: "\f161"; }
+
+.fa-arrow-up-z-a::before {
+  content: "\f882"; }
+
+.fa-sort-alpha-up-alt::before {
+  content: "\f882"; }
+
+.fa-arrows-left-right::before {
+  content: "\f07e"; }
+
+.fa-arrows-h::before {
+  content: "\f07e"; }
+
+.fa-arrows-rotate::before {
+  content: "\f021"; }
+
+.fa-refresh::before {
+  content: "\f021"; }
+
+.fa-sync::before {
+  content: "\f021"; }
+
+.fa-arrows-up-down::before {
+  content: "\f07d"; }
+
+.fa-arrows-v::before {
+  content: "\f07d"; }
+
+.fa-arrows-up-down-left-right::before {
+  content: "\f047"; }
+
+.fa-arrows::before {
+  content: "\f047"; }
+
+.fa-asterisk::before {
+  content: "\2a"; }
+
+.fa-at::before {
+  content: "\40"; }
+
+.fa-atom::before {
+  content: "\f5d2"; }
+
+.fa-audio-description::before {
+  content: "\f29e"; }
+
+.fa-austral-sign::before {
+  content: "\e0a9"; }
+
+.fa-award::before {
+  content: "\f559"; }
+
+.fa-b::before {
+  content: "\42"; }
+
+.fa-baby::before {
+  content: "\f77c"; }
+
+.fa-baby-carriage::before {
+  content: "\f77d"; }
+
+.fa-carriage-baby::before {
+  content: "\f77d"; }
+
+.fa-backward::before {
+  content: "\f04a"; }
+
+.fa-backward-fast::before {
+  content: "\f049"; }
+
+.fa-fast-backward::before {
+  content: "\f049"; }
+
+.fa-backward-step::before {
+  content: "\f048"; }
+
+.fa-step-backward::before {
+  content: "\f048"; }
+
+.fa-bacon::before {
+  content: "\f7e5"; }
+
+.fa-bacteria::before {
+  content: "\e059"; }
+
+.fa-bacterium::before {
+  content: "\e05a"; }
+
+.fa-bag-shopping::before {
+  content: "\f290"; }
+
+.fa-shopping-bag::before {
+  content: "\f290"; }
+
+.fa-bahai::before {
+  content: "\f666"; }
+
+.fa-baht-sign::before {
+  content: "\e0ac"; }
+
+.fa-ban::before {
+  content: "\f05e"; }
+
+.fa-cancel::before {
+  content: "\f05e"; }
+
+.fa-ban-smoking::before {
+  content: "\f54d"; }
+
+.fa-smoking-ban::before {
+  content: "\f54d"; }
+
+.fa-bandage::before {
+  content: "\f462"; }
+
+.fa-band-aid::before {
+  content: "\f462"; }
+
+.fa-barcode::before {
+  content: "\f02a"; }
+
+.fa-bars::before {
+  content: "\f0c9"; }
+
+.fa-navicon::before {
+  content: "\f0c9"; }
+
+.fa-bars-progress::before {
+  content: "\f828"; }
+
+.fa-tasks-alt::before {
+  content: "\f828"; }
+
+.fa-bars-staggered::before {
+  content: "\f550"; }
+
+.fa-reorder::before {
+  content: "\f550"; }
+
+.fa-stream::before {
+  content: "\f550"; }
+
+.fa-baseball::before {
+  content: "\f433"; }
+
+.fa-baseball-ball::before {
+  content: "\f433"; }
+
+.fa-baseball-bat-ball::before {
+  content: "\f432"; }
+
+.fa-basket-shopping::before {
+  content: "\f291"; }
+
+.fa-shopping-basket::before {
+  content: "\f291"; }
+
+.fa-basketball::before {
+  content: "\f434"; }
+
+.fa-basketball-ball::before {
+  content: "\f434"; }
+
+.fa-bath::before {
+  content: "\f2cd"; }
+
+.fa-bathtub::before {
+  content: "\f2cd"; }
+
+.fa-battery-empty::before {
+  content: "\f244"; }
+
+.fa-battery-0::before {
+  content: "\f244"; }
+
+.fa-battery-full::before {
+  content: "\f240"; }
+
+.fa-battery::before {
+  content: "\f240"; }
+
+.fa-battery-5::before {
+  content: "\f240"; }
+
+.fa-battery-half::before {
+  content: "\f242"; }
+
+.fa-battery-3::before {
+  content: "\f242"; }
+
+.fa-battery-quarter::before {
+  content: "\f243"; }
+
+.fa-battery-2::before {
+  content: "\f243"; }
+
+.fa-battery-three-quarters::before {
+  content: "\f241"; }
+
+.fa-battery-4::before {
+  content: "\f241"; }
+
+.fa-bed::before {
+  content: "\f236"; }
+
+.fa-bed-pulse::before {
+  content: "\f487"; }
+
+.fa-procedures::before {
+  content: "\f487"; }
+
+.fa-beer-mug-empty::before {
+  content: "\f0fc"; }
+
+.fa-beer::before {
+  content: "\f0fc"; }
+
+.fa-bell::before {
+  content: "\f0f3"; }
+
+.fa-bell-concierge::before {
+  content: "\f562"; }
+
+.fa-concierge-bell::before {
+  content: "\f562"; }
+
+.fa-bell-slash::before {
+  content: "\f1f6"; }
+
+.fa-bezier-curve::before {
+  content: "\f55b"; }
+
+.fa-bicycle::before {
+  content: "\f206"; }
+
+.fa-binoculars::before {
+  content: "\f1e5"; }
+
+.fa-biohazard::before {
+  content: "\f780"; }
+
+.fa-bitcoin-sign::before {
+  content: "\e0b4"; }
+
+.fa-blender::before {
+  content: "\f517"; }
+
+.fa-blender-phone::before {
+  content: "\f6b6"; }
+
+.fa-blog::before {
+  content: "\f781"; }
+
+.fa-bold::before {
+  content: "\f032"; }
+
+.fa-bolt::before {
+  content: "\f0e7"; }
+
+.fa-zap::before {
+  content: "\f0e7"; }
+
+.fa-bolt-lightning::before {
+  content: "\e0b7"; }
+
+.fa-bomb::before {
+  content: "\f1e2"; }
+
+.fa-bone::before {
+  content: "\f5d7"; }
+
+.fa-bong::before {
+  content: "\f55c"; }
+
+.fa-book::before {
+  content: "\f02d"; }
+
+.fa-book-atlas::before {
+  content: "\f558"; }
+
+.fa-atlas::before {
+  content: "\f558"; }
+
+.fa-book-bible::before {
+  content: "\f647"; }
+
+.fa-bible::before {
+  content: "\f647"; }
+
+.fa-book-journal-whills::before {
+  content: "\f66a"; }
+
+.fa-journal-whills::before {
+  content: "\f66a"; }
+
+.fa-book-medical::before {
+  content: "\f7e6"; }
+
+.fa-book-open::before {
+  content: "\f518"; }
+
+.fa-book-open-reader::before {
+  content: "\f5da"; }
+
+.fa-book-reader::before {
+  content: "\f5da"; }
+
+.fa-book-quran::before {
+  content: "\f687"; }
+
+.fa-quran::before {
+  content: "\f687"; }
+
+.fa-book-skull::before {
+  content: "\f6b7"; }
+
+.fa-book-dead::before {
+  content: "\f6b7"; }
+
+.fa-bookmark::before {
+  content: "\f02e"; }
+
+.fa-border-all::before {
+  content: "\f84c"; }
+
+.fa-border-none::before {
+  content: "\f850"; }
+
+.fa-border-top-left::before {
+  content: "\f853"; }
+
+.fa-border-style::before {
+  content: "\f853"; }
+
+.fa-bowling-ball::before {
+  content: "\f436"; }
+
+.fa-box::before {
+  content: "\f466"; }
+
+.fa-box-archive::before {
+  content: "\f187"; }
+
+.fa-archive::before {
+  content: "\f187"; }
+
+.fa-box-open::before {
+  content: "\f49e"; }
+
+.fa-box-tissue::before {
+  content: "\e05b"; }
+
+.fa-boxes-stacked::before {
+  content: "\f468"; }
+
+.fa-boxes::before {
+  content: "\f468"; }
+
+.fa-boxes-alt::before {
+  content: "\f468"; }
+
+.fa-braille::before {
+  content: "\f2a1"; }
+
+.fa-brain::before {
+  content: "\f5dc"; }
+
+.fa-brazilian-real-sign::before {
+  content: "\e46c"; }
+
+.fa-bread-slice::before {
+  content: "\f7ec"; }
+
+.fa-briefcase::before {
+  content: "\f0b1"; }
+
+.fa-briefcase-medical::before {
+  content: "\f469"; }
+
+.fa-broom::before {
+  content: "\f51a"; }
+
+.fa-broom-ball::before {
+  content: "\f458"; }
+
+.fa-quidditch::before {
+  content: "\f458"; }
+
+.fa-quidditch-broom-ball::before {
+  content: "\f458"; }
+
+.fa-brush::before {
+  content: "\f55d"; }
+
+.fa-bug::before {
+  content: "\f188"; }
+
+.fa-bug-slash::before {
+  content: "\e490"; }
+
+.fa-building::before {
+  content: "\f1ad"; }
+
+.fa-building-columns::before {
+  content: "\f19c"; }
+
+.fa-bank::before {
+  content: "\f19c"; }
+
+.fa-institution::before {
+  content: "\f19c"; }
+
+.fa-museum::before {
+  content: "\f19c"; }
+
+.fa-university::before {
+  content: "\f19c"; }
+
+.fa-bullhorn::before {
+  content: "\f0a1"; }
+
+.fa-bullseye::before {
+  content: "\f140"; }
+
+.fa-burger::before {
+  content: "\f805"; }
+
+.fa-hamburger::before {
+  content: "\f805"; }
+
+.fa-bus::before {
+  content: "\f207"; }
+
+.fa-bus-simple::before {
+  content: "\f55e"; }
+
+.fa-bus-alt::before {
+  content: "\f55e"; }
+
+.fa-business-time::before {
+  content: "\f64a"; }
+
+.fa-briefcase-clock::before {
+  content: "\f64a"; }
+
+.fa-c::before {
+  content: "\43"; }
+
+.fa-cake-candles::before {
+  content: "\f1fd"; }
+
+.fa-birthday-cake::before {
+  content: "\f1fd"; }
+
+.fa-cake::before {
+  content: "\f1fd"; }
+
+.fa-calculator::before {
+  content: "\f1ec"; }
+
+.fa-calendar::before {
+  content: "\f133"; }
+
+.fa-calendar-check::before {
+  content: "\f274"; }
+
+.fa-calendar-day::before {
+  content: "\f783"; }
+
+.fa-calendar-days::before {
+  content: "\f073"; }
+
+.fa-calendar-alt::before {
+  content: "\f073"; }
+
+.fa-calendar-minus::before {
+  content: "\f272"; }
+
+.fa-calendar-plus::before {
+  content: "\f271"; }
+
+.fa-calendar-week::before {
+  content: "\f784"; }
+
+.fa-calendar-xmark::before {
+  content: "\f273"; }
+
+.fa-calendar-times::before {
+  content: "\f273"; }
+
+.fa-camera::before {
+  content: "\f030"; }
+
+.fa-camera-alt::before {
+  content: "\f030"; }
+
+.fa-camera-retro::before {
+  content: "\f083"; }
+
+.fa-camera-rotate::before {
+  content: "\e0d8"; }
+
+.fa-campground::before {
+  content: "\f6bb"; }
+
+.fa-candy-cane::before {
+  content: "\f786"; }
+
+.fa-cannabis::before {
+  content: "\f55f"; }
+
+.fa-capsules::before {
+  content: "\f46b"; }
+
+.fa-car::before {
+  content: "\f1b9"; }
+
+.fa-automobile::before {
+  content: "\f1b9"; }
+
+.fa-car-battery::before {
+  content: "\f5df"; }
+
+.fa-battery-car::before {
+  content: "\f5df"; }
+
+.fa-car-crash::before {
+  content: "\f5e1"; }
+
+.fa-car-rear::before {
+  content: "\f5de"; }
+
+.fa-car-alt::before {
+  content: "\f5de"; }
+
+.fa-car-side::before {
+  content: "\f5e4"; }
+
+.fa-caravan::before {
+  content: "\f8ff"; }
+
+.fa-caret-down::before {
+  content: "\f0d7"; }
+
+.fa-caret-left::before {
+  content: "\f0d9"; }
+
+.fa-caret-right::before {
+  content: "\f0da"; }
+
+.fa-caret-up::before {
+  content: "\f0d8"; }
+
+.fa-carrot::before {
+  content: "\f787"; }
+
+.fa-cart-arrow-down::before {
+  content: "\f218"; }
+
+.fa-cart-flatbed::before {
+  content: "\f474"; }
+
+.fa-dolly-flatbed::before {
+  content: "\f474"; }
+
+.fa-cart-flatbed-suitcase::before {
+  content: "\f59d"; }
+
+.fa-luggage-cart::before {
+  content: "\f59d"; }
+
+.fa-cart-plus::before {
+  content: "\f217"; }
+
+.fa-cart-shopping::before {
+  content: "\f07a"; }
+
+.fa-shopping-cart::before {
+  content: "\f07a"; }
+
+.fa-cash-register::before {
+  content: "\f788"; }
+
+.fa-cat::before {
+  content: "\f6be"; }
+
+.fa-cedi-sign::before {
+  content: "\e0df"; }
+
+.fa-cent-sign::before {
+  content: "\e3f5"; }
+
+.fa-certificate::before {
+  content: "\f0a3"; }
+
+.fa-chair::before {
+  content: "\f6c0"; }
+
+.fa-chalkboard::before {
+  content: "\f51b"; }
+
+.fa-blackboard::before {
+  content: "\f51b"; }
+
+.fa-chalkboard-user::before {
+  content: "\f51c"; }
+
+.fa-chalkboard-teacher::before {
+  content: "\f51c"; }
+
+.fa-champagne-glasses::before {
+  content: "\f79f"; }
+
+.fa-glass-cheers::before {
+  content: "\f79f"; }
+
+.fa-charging-station::before {
+  content: "\f5e7"; }
+
+.fa-chart-area::before {
+  content: "\f1fe"; }
+
+.fa-area-chart::before {
+  content: "\f1fe"; }
+
+.fa-chart-bar::before {
+  content: "\f080"; }
+
+.fa-bar-chart::before {
+  content: "\f080"; }
+
+.fa-chart-column::before {
+  content: "\e0e3"; }
+
+.fa-chart-gantt::before {
+  content: "\e0e4"; }
+
+.fa-chart-line::before {
+  content: "\f201"; }
+
+.fa-line-chart::before {
+  content: "\f201"; }
+
+.fa-chart-pie::before {
+  content: "\f200"; }
+
+.fa-pie-chart::before {
+  content: "\f200"; }
+
+.fa-check::before {
+  content: "\f00c"; }
+
+.fa-check-double::before {
+  content: "\f560"; }
+
+.fa-check-to-slot::before {
+  content: "\f772"; }
+
+.fa-vote-yea::before {
+  content: "\f772"; }
+
+.fa-cheese::before {
+  content: "\f7ef"; }
+
+.fa-chess::before {
+  content: "\f439"; }
+
+.fa-chess-bishop::before {
+  content: "\f43a"; }
+
+.fa-chess-board::before {
+  content: "\f43c"; }
+
+.fa-chess-king::before {
+  content: "\f43f"; }
+
+.fa-chess-knight::before {
+  content: "\f441"; }
+
+.fa-chess-pawn::before {
+  content: "\f443"; }
+
+.fa-chess-queen::before {
+  content: "\f445"; }
+
+.fa-chess-rook::before {
+  content: "\f447"; }
+
+.fa-chevron-down::before {
+  content: "\f078"; }
+
+.fa-chevron-left::before {
+  content: "\f053"; }
+
+.fa-chevron-right::before {
+  content: "\f054"; }
+
+.fa-chevron-up::before {
+  content: "\f077"; }
+
+.fa-child::before {
+  content: "\f1ae"; }
+
+.fa-church::before {
+  content: "\f51d"; }
+
+.fa-circle::before {
+  content: "\f111"; }
+
+.fa-circle-arrow-down::before {
+  content: "\f0ab"; }
+
+.fa-arrow-circle-down::before {
+  content: "\f0ab"; }
+
+.fa-circle-arrow-left::before {
+  content: "\f0a8"; }
+
+.fa-arrow-circle-left::before {
+  content: "\f0a8"; }
+
+.fa-circle-arrow-right::before {
+  content: "\f0a9"; }
+
+.fa-arrow-circle-right::before {
+  content: "\f0a9"; }
+
+.fa-circle-arrow-up::before {
+  content: "\f0aa"; }
+
+.fa-arrow-circle-up::before {
+  content: "\f0aa"; }
+
+.fa-circle-check::before {
+  content: "\f058"; }
+
+.fa-check-circle::before {
+  content: "\f058"; }
+
+.fa-circle-chevron-down::before {
+  content: "\f13a"; }
+
+.fa-chevron-circle-down::before {
+  content: "\f13a"; }
+
+.fa-circle-chevron-left::before {
+  content: "\f137"; }
+
+.fa-chevron-circle-left::before {
+  content: "\f137"; }
+
+.fa-circle-chevron-right::before {
+  content: "\f138"; }
+
+.fa-chevron-circle-right::before {
+  content: "\f138"; }
+
+.fa-circle-chevron-up::before {
+  content: "\f139"; }
+
+.fa-chevron-circle-up::before {
+  content: "\f139"; }
+
+.fa-circle-dollar-to-slot::before {
+  content: "\f4b9"; }
+
+.fa-donate::before {
+  content: "\f4b9"; }
+
+.fa-circle-dot::before {
+  content: "\f192"; }
+
+.fa-dot-circle::before {
+  content: "\f192"; }
+
+.fa-circle-down::before {
+  content: "\f358"; }
+
+.fa-arrow-alt-circle-down::before {
+  content: "\f358"; }
+
+.fa-circle-exclamation::before {
+  content: "\f06a"; }
+
+.fa-exclamation-circle::before {
+  content: "\f06a"; }
+
+.fa-circle-h::before {
+  content: "\f47e"; }
+
+.fa-hospital-symbol::before {
+  content: "\f47e"; }
+
+.fa-circle-half-stroke::before {
+  content: "\f042"; }
+
+.fa-adjust::before {
+  content: "\f042"; }
+
+.fa-circle-info::before {
+  content: "\f05a"; }
+
+.fa-info-circle::before {
+  content: "\f05a"; }
+
+.fa-circle-left::before {
+  content: "\f359"; }
+
+.fa-arrow-alt-circle-left::before {
+  content: "\f359"; }
+
+.fa-circle-minus::before {
+  content: "\f056"; }
+
+.fa-minus-circle::before {
+  content: "\f056"; }
+
+.fa-circle-notch::before {
+  content: "\f1ce"; }
+
+.fa-circle-pause::before {
+  content: "\f28b"; }
+
+.fa-pause-circle::before {
+  content: "\f28b"; }
+
+.fa-circle-play::before {
+  content: "\f144"; }
+
+.fa-play-circle::before {
+  content: "\f144"; }
+
+.fa-circle-plus::before {
+  content: "\f055"; }
+
+.fa-plus-circle::before {
+  content: "\f055"; }
+
+.fa-circle-question::before {
+  content: "\f059"; }
+
+.fa-question-circle::before {
+  content: "\f059"; }
+
+.fa-circle-radiation::before {
+  content: "\f7ba"; }
+
+.fa-radiation-alt::before {
+  content: "\f7ba"; }
+
+.fa-circle-right::before {
+  content: "\f35a"; }
+
+.fa-arrow-alt-circle-right::before {
+  content: "\f35a"; }
+
+.fa-circle-stop::before {
+  content: "\f28d"; }
+
+.fa-stop-circle::before {
+  content: "\f28d"; }
+
+.fa-circle-up::before {
+  content: "\f35b"; }
+
+.fa-arrow-alt-circle-up::before {
+  content: "\f35b"; }
+
+.fa-circle-user::before {
+  content: "\f2bd"; }
+
+.fa-user-circle::before {
+  content: "\f2bd"; }
+
+.fa-circle-xmark::before {
+  content: "\f057"; }
+
+.fa-times-circle::before {
+  content: "\f057"; }
+
+.fa-xmark-circle::before {
+  content: "\f057"; }
+
+.fa-city::before {
+  content: "\f64f"; }
+
+.fa-clapperboard::before {
+  content: "\e131"; }
+
+.fa-clipboard::before {
+  content: "\f328"; }
+
+.fa-clipboard-check::before {
+  content: "\f46c"; }
+
+.fa-clipboard-list::before {
+  content: "\f46d"; }
+
+.fa-clock::before {
+  content: "\f017"; }
+
+.fa-clock-four::before {
+  content: "\f017"; }
+
+.fa-clock-rotate-left::before {
+  content: "\f1da"; }
+
+.fa-history::before {
+  content: "\f1da"; }
+
+.fa-clone::before {
+  content: "\f24d"; }
+
+.fa-closed-captioning::before {
+  content: "\f20a"; }
+
+.fa-cloud::before {
+  content: "\f0c2"; }
+
+.fa-cloud-arrow-down::before {
+  content: "\f0ed"; }
+
+.fa-cloud-download::before {
+  content: "\f0ed"; }
+
+.fa-cloud-download-alt::before {
+  content: "\f0ed"; }
+
+.fa-cloud-arrow-up::before {
+  content: "\f0ee"; }
+
+.fa-cloud-upload::before {
+  content: "\f0ee"; }
+
+.fa-cloud-upload-alt::before {
+  content: "\f0ee"; }
+
+.fa-cloud-meatball::before {
+  content: "\f73b"; }
+
+.fa-cloud-moon::before {
+  content: "\f6c3"; }
+
+.fa-cloud-moon-rain::before {
+  content: "\f73c"; }
+
+.fa-cloud-rain::before {
+  content: "\f73d"; }
+
+.fa-cloud-showers-heavy::before {
+  content: "\f740"; }
+
+.fa-cloud-sun::before {
+  content: "\f6c4"; }
+
+.fa-cloud-sun-rain::before {
+  content: "\f743"; }
+
+.fa-clover::before {
+  content: "\e139"; }
+
+.fa-code::before {
+  content: "\f121"; }
+
+.fa-code-branch::before {
+  content: "\f126"; }
+
+.fa-code-commit::before {
+  content: "\f386"; }
+
+.fa-code-compare::before {
+  content: "\e13a"; }
+
+.fa-code-fork::before {
+  content: "\e13b"; }
+
+.fa-code-merge::before {
+  content: "\f387"; }
+
+.fa-code-pull-request::before {
+  content: "\e13c"; }
+
+.fa-coins::before {
+  content: "\f51e"; }
+
+.fa-colon-sign::before {
+  content: "\e140"; }
+
+.fa-comment::before {
+  content: "\f075"; }
+
+.fa-comment-dollar::before {
+  content: "\f651"; }
+
+.fa-comment-dots::before {
+  content: "\f4ad"; }
+
+.fa-commenting::before {
+  content: "\f4ad"; }
+
+.fa-comment-medical::before {
+  content: "\f7f5"; }
+
+.fa-comment-slash::before {
+  content: "\f4b3"; }
+
+.fa-comment-sms::before {
+  content: "\f7cd"; }
+
+.fa-sms::before {
+  content: "\f7cd"; }
+
+.fa-comments::before {
+  content: "\f086"; }
+
+.fa-comments-dollar::before {
+  content: "\f653"; }
+
+.fa-compact-disc::before {
+  content: "\f51f"; }
+
+.fa-compass::before {
+  content: "\f14e"; }
+
+.fa-compass-drafting::before {
+  content: "\f568"; }
+
+.fa-drafting-compass::before {
+  content: "\f568"; }
+
+.fa-compress::before {
+  content: "\f066"; }
+
+.fa-computer-mouse::before {
+  content: "\f8cc"; }
+
+.fa-mouse::before {
+  content: "\f8cc"; }
+
+.fa-cookie::before {
+  content: "\f563"; }
+
+.fa-cookie-bite::before {
+  content: "\f564"; }
+
+.fa-copy::before {
+  content: "\f0c5"; }
+
+.fa-copyright::before {
+  content: "\f1f9"; }
+
+.fa-couch::before {
+  content: "\f4b8"; }
+
+.fa-credit-card::before {
+  content: "\f09d"; }
+
+.fa-credit-card-alt::before {
+  content: "\f09d"; }
+
+.fa-crop::before {
+  content: "\f125"; }
+
+.fa-crop-simple::before {
+  content: "\f565"; }
+
+.fa-crop-alt::before {
+  content: "\f565"; }
+
+.fa-cross::before {
+  content: "\f654"; }
+
+.fa-crosshairs::before {
+  content: "\f05b"; }
+
+.fa-crow::before {
+  content: "\f520"; }
+
+.fa-crown::before {
+  content: "\f521"; }
+
+.fa-crutch::before {
+  content: "\f7f7"; }
+
+.fa-cruzeiro-sign::before {
+  content: "\e152"; }
+
+.fa-cube::before {
+  content: "\f1b2"; }
+
+.fa-cubes::before {
+  content: "\f1b3"; }
+
+.fa-d::before {
+  content: "\44"; }
+
+.fa-database::before {
+  content: "\f1c0"; }
+
+.fa-delete-left::before {
+  content: "\f55a"; }
+
+.fa-backspace::before {
+  content: "\f55a"; }
+
+.fa-democrat::before {
+  content: "\f747"; }
+
+.fa-desktop::before {
+  content: "\f390"; }
+
+.fa-desktop-alt::before {
+  content: "\f390"; }
+
+.fa-dharmachakra::before {
+  content: "\f655"; }
+
+.fa-diagram-next::before {
+  content: "\e476"; }
+
+.fa-diagram-predecessor::before {
+  content: "\e477"; }
+
+.fa-diagram-project::before {
+  content: "\f542"; }
+
+.fa-project-diagram::before {
+  content: "\f542"; }
+
+.fa-diagram-successor::before {
+  content: "\e47a"; }
+
+.fa-diamond::before {
+  content: "\f219"; }
+
+.fa-diamond-turn-right::before {
+  content: "\f5eb"; }
+
+.fa-directions::before {
+  content: "\f5eb"; }
+
+.fa-dice::before {
+  content: "\f522"; }
+
+.fa-dice-d20::before {
+  content: "\f6cf"; }
+
+.fa-dice-d6::before {
+  content: "\f6d1"; }
+
+.fa-dice-five::before {
+  content: "\f523"; }
+
+.fa-dice-four::before {
+  content: "\f524"; }
+
+.fa-dice-one::before {
+  content: "\f525"; }
+
+.fa-dice-six::before {
+  content: "\f526"; }
+
+.fa-dice-three::before {
+  content: "\f527"; }
+
+.fa-dice-two::before {
+  content: "\f528"; }
+
+.fa-disease::before {
+  content: "\f7fa"; }
+
+.fa-divide::before {
+  content: "\f529"; }
+
+.fa-dna::before {
+  content: "\f471"; }
+
+.fa-dog::before {
+  content: "\f6d3"; }
+
+.fa-dollar-sign::before {
+  content: "\24"; }
+
+.fa-dollar::before {
+  content: "\24"; }
+
+.fa-usd::before {
+  content: "\24"; }
+
+.fa-dolly::before {
+  content: "\f472"; }
+
+.fa-dolly-box::before {
+  content: "\f472"; }
+
+.fa-dong-sign::before {
+  content: "\e169"; }
+
+.fa-door-closed::before {
+  content: "\f52a"; }
+
+.fa-door-open::before {
+  content: "\f52b"; }
+
+.fa-dove::before {
+  content: "\f4ba"; }
+
+.fa-down-left-and-up-right-to-center::before {
+  content: "\f422"; }
+
+.fa-compress-alt::before {
+  content: "\f422"; }
+
+.fa-down-long::before {
+  content: "\f309"; }
+
+.fa-long-arrow-alt-down::before {
+  content: "\f309"; }
+
+.fa-download::before {
+  content: "\f019"; }
+
+.fa-dragon::before {
+  content: "\f6d5"; }
+
+.fa-draw-polygon::before {
+  content: "\f5ee"; }
+
+.fa-droplet::before {
+  content: "\f043"; }
+
+.fa-tint::before {
+  content: "\f043"; }
+
+.fa-droplet-slash::before {
+  content: "\f5c7"; }
+
+.fa-tint-slash::before {
+  content: "\f5c7"; }
+
+.fa-drum::before {
+  content: "\f569"; }
+
+.fa-drum-steelpan::before {
+  content: "\f56a"; }
+
+.fa-drumstick-bite::before {
+  content: "\f6d7"; }
+
+.fa-dumbbell::before {
+  content: "\f44b"; }
+
+.fa-dumpster::before {
+  content: "\f793"; }
+
+.fa-dumpster-fire::before {
+  content: "\f794"; }
+
+.fa-dungeon::before {
+  content: "\f6d9"; }
+
+.fa-e::before {
+  content: "\45"; }
+
+.fa-ear-deaf::before {
+  content: "\f2a4"; }
+
+.fa-deaf::before {
+  content: "\f2a4"; }
+
+.fa-deafness::before {
+  content: "\f2a4"; }
+
+.fa-hard-of-hearing::before {
+  content: "\f2a4"; }
+
+.fa-ear-listen::before {
+  content: "\f2a2"; }
+
+.fa-assistive-listening-systems::before {
+  content: "\f2a2"; }
+
+.fa-earth-africa::before {
+  content: "\f57c"; }
+
+.fa-globe-africa::before {
+  content: "\f57c"; }
+
+.fa-earth-americas::before {
+  content: "\f57d"; }
+
+.fa-earth::before {
+  content: "\f57d"; }
+
+.fa-earth-america::before {
+  content: "\f57d"; }
+
+.fa-globe-americas::before {
+  content: "\f57d"; }
+
+.fa-earth-asia::before {
+  content: "\f57e"; }
+
+.fa-globe-asia::before {
+  content: "\f57e"; }
+
+.fa-earth-europe::before {
+  content: "\f7a2"; }
+
+.fa-globe-europe::before {
+  content: "\f7a2"; }
+
+.fa-earth-oceania::before {
+  content: "\e47b"; }
+
+.fa-globe-oceania::before {
+  content: "\e47b"; }
+
+.fa-egg::before {
+  content: "\f7fb"; }
+
+.fa-eject::before {
+  content: "\f052"; }
+
+.fa-elevator::before {
+  content: "\e16d"; }
+
+.fa-ellipsis::before {
+  content: "\f141"; }
+
+.fa-ellipsis-h::before {
+  content: "\f141"; }
+
+.fa-ellipsis-vertical::before {
+  content: "\f142"; }
+
+.fa-ellipsis-v::before {
+  content: "\f142"; }
+
+.fa-envelope::before {
+  content: "\f0e0"; }
+
+.fa-envelope-open::before {
+  content: "\f2b6"; }
+
+.fa-envelope-open-text::before {
+  content: "\f658"; }
+
+.fa-envelopes-bulk::before {
+  content: "\f674"; }
+
+.fa-mail-bulk::before {
+  content: "\f674"; }
+
+.fa-equals::before {
+  content: "\3d"; }
+
+.fa-eraser::before {
+  content: "\f12d"; }
+
+.fa-ethernet::before {
+  content: "\f796"; }
+
+.fa-euro-sign::before {
+  content: "\f153"; }
+
+.fa-eur::before {
+  content: "\f153"; }
+
+.fa-euro::before {
+  content: "\f153"; }
+
+.fa-exclamation::before {
+  content: "\21"; }
+
+.fa-expand::before {
+  content: "\f065"; }
+
+.fa-eye::before {
+  content: "\f06e"; }
+
+.fa-eye-dropper::before {
+  content: "\f1fb"; }
+
+.fa-eye-dropper-empty::before {
+  content: "\f1fb"; }
+
+.fa-eyedropper::before {
+  content: "\f1fb"; }
+
+.fa-eye-low-vision::before {
+  content: "\f2a8"; }
+
+.fa-low-vision::before {
+  content: "\f2a8"; }
+
+.fa-eye-slash::before {
+  content: "\f070"; }
+
+.fa-f::before {
+  content: "\46"; }
+
+.fa-face-angry::before {
+  content: "\f556"; }
+
+.fa-angry::before {
+  content: "\f556"; }
+
+.fa-face-dizzy::before {
+  content: "\f567"; }
+
+.fa-dizzy::before {
+  content: "\f567"; }
+
+.fa-face-flushed::before {
+  content: "\f579"; }
+
+.fa-flushed::before {
+  content: "\f579"; }
+
+.fa-face-frown::before {
+  content: "\f119"; }
+
+.fa-frown::before {
+  content: "\f119"; }
+
+.fa-face-frown-open::before {
+  content: "\f57a"; }
+
+.fa-frown-open::before {
+  content: "\f57a"; }
+
+.fa-face-grimace::before {
+  content: "\f57f"; }
+
+.fa-grimace::before {
+  content: "\f57f"; }
+
+.fa-face-grin::before {
+  content: "\f580"; }
+
+.fa-grin::before {
+  content: "\f580"; }
+
+.fa-face-grin-beam::before {
+  content: "\f582"; }
+
+.fa-grin-beam::before {
+  content: "\f582"; }
+
+.fa-face-grin-beam-sweat::before {
+  content: "\f583"; }
+
+.fa-grin-beam-sweat::before {
+  content: "\f583"; }
+
+.fa-face-grin-hearts::before {
+  content: "\f584"; }
+
+.fa-grin-hearts::before {
+  content: "\f584"; }
+
+.fa-face-grin-squint::before {
+  content: "\f585"; }
+
+.fa-grin-squint::before {
+  content: "\f585"; }
+
+.fa-face-grin-squint-tears::before {
+  content: "\f586"; }
+
+.fa-grin-squint-tears::before {
+  content: "\f586"; }
+
+.fa-face-grin-stars::before {
+  content: "\f587"; }
+
+.fa-grin-stars::before {
+  content: "\f587"; }
+
+.fa-face-grin-tears::before {
+  content: "\f588"; }
+
+.fa-grin-tears::before {
+  content: "\f588"; }
+
+.fa-face-grin-tongue::before {
+  content: "\f589"; }
+
+.fa-grin-tongue::before {
+  content: "\f589"; }
+
+.fa-face-grin-tongue-squint::before {
+  content: "\f58a"; }
+
+.fa-grin-tongue-squint::before {
+  content: "\f58a"; }
+
+.fa-face-grin-tongue-wink::before {
+  content: "\f58b"; }
+
+.fa-grin-tongue-wink::before {
+  content: "\f58b"; }
+
+.fa-face-grin-wide::before {
+  content: "\f581"; }
+
+.fa-grin-alt::before {
+  content: "\f581"; }
+
+.fa-face-grin-wink::before {
+  content: "\f58c"; }
+
+.fa-grin-wink::before {
+  content: "\f58c"; }
+
+.fa-face-kiss::before {
+  content: "\f596"; }
+
+.fa-kiss::before {
+  content: "\f596"; }
+
+.fa-face-kiss-beam::before {
+  content: "\f597"; }
+
+.fa-kiss-beam::before {
+  content: "\f597"; }
+
+.fa-face-kiss-wink-heart::before {
+  content: "\f598"; }
+
+.fa-kiss-wink-heart::before {
+  content: "\f598"; }
+
+.fa-face-laugh::before {
+  content: "\f599"; }
+
+.fa-laugh::before {
+  content: "\f599"; }
+
+.fa-face-laugh-beam::before {
+  content: "\f59a"; }
+
+.fa-laugh-beam::before {
+  content: "\f59a"; }
+
+.fa-face-laugh-squint::before {
+  content: "\f59b"; }
+
+.fa-laugh-squint::before {
+  content: "\f59b"; }
+
+.fa-face-laugh-wink::before {
+  content: "\f59c"; }
+
+.fa-laugh-wink::before {
+  content: "\f59c"; }
+
+.fa-face-meh::before {
+  content: "\f11a"; }
+
+.fa-meh::before {
+  content: "\f11a"; }
+
+.fa-face-meh-blank::before {
+  content: "\f5a4"; }
+
+.fa-meh-blank::before {
+  content: "\f5a4"; }
+
+.fa-face-rolling-eyes::before {
+  content: "\f5a5"; }
+
+.fa-meh-rolling-eyes::before {
+  content: "\f5a5"; }
+
+.fa-face-sad-cry::before {
+  content: "\f5b3"; }
+
+.fa-sad-cry::before {
+  content: "\f5b3"; }
+
+.fa-face-sad-tear::before {
+  content: "\f5b4"; }
+
+.fa-sad-tear::before {
+  content: "\f5b4"; }
+
+.fa-face-smile::before {
+  content: "\f118"; }
+
+.fa-smile::before {
+  content: "\f118"; }
+
+.fa-face-smile-beam::before {
+  content: "\f5b8"; }
+
+.fa-smile-beam::before {
+  content: "\f5b8"; }
+
+.fa-face-smile-wink::before {
+  content: "\f4da"; }
+
+.fa-smile-wink::before {
+  content: "\f4da"; }
+
+.fa-face-surprise::before {
+  content: "\f5c2"; }
+
+.fa-surprise::before {
+  content: "\f5c2"; }
+
+.fa-face-tired::before {
+  content: "\f5c8"; }
+
+.fa-tired::before {
+  content: "\f5c8"; }
+
+.fa-fan::before {
+  content: "\f863"; }
+
+.fa-faucet::before {
+  content: "\e005"; }
+
+.fa-fax::before {
+  content: "\f1ac"; }
+
+.fa-feather::before {
+  content: "\f52d"; }
+
+.fa-feather-pointed::before {
+  content: "\f56b"; }
+
+.fa-feather-alt::before {
+  content: "\f56b"; }
+
+.fa-file::before {
+  content: "\f15b"; }
+
+.fa-file-arrow-down::before {
+  content: "\f56d"; }
+
+.fa-file-download::before {
+  content: "\f56d"; }
+
+.fa-file-arrow-up::before {
+  content: "\f574"; }
+
+.fa-file-upload::before {
+  content: "\f574"; }
+
+.fa-file-audio::before {
+  content: "\f1c7"; }
+
+.fa-file-code::before {
+  content: "\f1c9"; }
+
+.fa-file-contract::before {
+  content: "\f56c"; }
+
+.fa-file-csv::before {
+  content: "\f6dd"; }
+
+.fa-file-excel::before {
+  content: "\f1c3"; }
+
+.fa-file-export::before {
+  content: "\f56e"; }
+
+.fa-arrow-right-from-file::before {
+  content: "\f56e"; }
+
+.fa-file-image::before {
+  content: "\f1c5"; }
+
+.fa-file-import::before {
+  content: "\f56f"; }
+
+.fa-arrow-right-to-file::before {
+  content: "\f56f"; }
+
+.fa-file-invoice::before {
+  content: "\f570"; }
+
+.fa-file-invoice-dollar::before {
+  content: "\f571"; }
+
+.fa-file-lines::before {
+  content: "\f15c"; }
+
+.fa-file-alt::before {
+  content: "\f15c"; }
+
+.fa-file-text::before {
+  content: "\f15c"; }
+
+.fa-file-medical::before {
+  content: "\f477"; }
+
+.fa-file-pdf::before {
+  content: "\f1c1"; }
+
+.fa-file-powerpoint::before {
+  content: "\f1c4"; }
+
+.fa-file-prescription::before {
+  content: "\f572"; }
+
+.fa-file-signature::before {
+  content: "\f573"; }
+
+.fa-file-video::before {
+  content: "\f1c8"; }
+
+.fa-file-waveform::before {
+  content: "\f478"; }
+
+.fa-file-medical-alt::before {
+  content: "\f478"; }
+
+.fa-file-word::before {
+  content: "\f1c2"; }
+
+.fa-file-zipper::before {
+  content: "\f1c6"; }
+
+.fa-file-archive::before {
+  content: "\f1c6"; }
+
+.fa-fill::before {
+  content: "\f575"; }
+
+.fa-fill-drip::before {
+  content: "\f576"; }
+
+.fa-film::before {
+  content: "\f008"; }
+
+.fa-filter::before {
+  content: "\f0b0"; }
+
+.fa-filter-circle-dollar::before {
+  content: "\f662"; }
+
+.fa-funnel-dollar::before {
+  content: "\f662"; }
+
+.fa-filter-circle-xmark::before {
+  content: "\e17b"; }
+
+.fa-fingerprint::before {
+  content: "\f577"; }
+
+.fa-fire::before {
+  content: "\f06d"; }
+
+.fa-fire-extinguisher::before {
+  content: "\f134"; }
+
+.fa-fire-flame-curved::before {
+  content: "\f7e4"; }
+
+.fa-fire-alt::before {
+  content: "\f7e4"; }
+
+.fa-fire-flame-simple::before {
+  content: "\f46a"; }
+
+.fa-burn::before {
+  content: "\f46a"; }
+
+.fa-fish::before {
+  content: "\f578"; }
+
+.fa-flag::before {
+  content: "\f024"; }
+
+.fa-flag-checkered::before {
+  content: "\f11e"; }
+
+.fa-flag-usa::before {
+  content: "\f74d"; }
+
+.fa-flask::before {
+  content: "\f0c3"; }
+
+.fa-floppy-disk::before {
+  content: "\f0c7"; }
+
+.fa-save::before {
+  content: "\f0c7"; }
+
+.fa-florin-sign::before {
+  content: "\e184"; }
+
+.fa-folder::before {
+  content: "\f07b"; }
+
+.fa-folder-minus::before {
+  content: "\f65d"; }
+
+.fa-folder-open::before {
+  content: "\f07c"; }
+
+.fa-folder-plus::before {
+  content: "\f65e"; }
+
+.fa-folder-tree::before {
+  content: "\f802"; }
+
+.fa-font::before {
+  content: "\f031"; }
+
+.fa-football::before {
+  content: "\f44e"; }
+
+.fa-football-ball::before {
+  content: "\f44e"; }
+
+.fa-forward::before {
+  content: "\f04e"; }
+
+.fa-forward-fast::before {
+  content: "\f050"; }
+
+.fa-fast-forward::before {
+  content: "\f050"; }
+
+.fa-forward-step::before {
+  content: "\f051"; }
+
+.fa-step-forward::before {
+  content: "\f051"; }
+
+.fa-franc-sign::before {
+  content: "\e18f"; }
+
+.fa-frog::before {
+  content: "\f52e"; }
+
+.fa-futbol::before {
+  content: "\f1e3"; }
+
+.fa-futbol-ball::before {
+  content: "\f1e3"; }
+
+.fa-soccer-ball::before {
+  content: "\f1e3"; }
+
+.fa-g::before {
+  content: "\47"; }
+
+.fa-gamepad::before {
+  content: "\f11b"; }
+
+.fa-gas-pump::before {
+  content: "\f52f"; }
+
+.fa-gauge::before {
+  content: "\f624"; }
+
+.fa-dashboard::before {
+  content: "\f624"; }
+
+.fa-gauge-med::before {
+  content: "\f624"; }
+
+.fa-tachometer-alt-average::before {
+  content: "\f624"; }
+
+.fa-gauge-high::before {
+  content: "\f625"; }
+
+.fa-tachometer-alt::before {
+  content: "\f625"; }
+
+.fa-tachometer-alt-fast::before {
+  content: "\f625"; }
+
+.fa-gauge-simple::before {
+  content: "\f629"; }
+
+.fa-gauge-simple-med::before {
+  content: "\f629"; }
+
+.fa-tachometer-average::before {
+  content: "\f629"; }
+
+.fa-gauge-simple-high::before {
+  content: "\f62a"; }
+
+.fa-tachometer::before {
+  content: "\f62a"; }
+
+.fa-tachometer-fast::before {
+  content: "\f62a"; }
+
+.fa-gavel::before {
+  content: "\f0e3"; }
+
+.fa-legal::before {
+  content: "\f0e3"; }
+
+.fa-gear::before {
+  content: "\f013"; }
+
+.fa-cog::before {
+  content: "\f013"; }
+
+.fa-gears::before {
+  content: "\f085"; }
+
+.fa-cogs::before {
+  content: "\f085"; }
+
+.fa-gem::before {
+  content: "\f3a5"; }
+
+.fa-genderless::before {
+  content: "\f22d"; }
+
+.fa-ghost::before {
+  content: "\f6e2"; }
+
+.fa-gift::before {
+  content: "\f06b"; }
+
+.fa-gifts::before {
+  content: "\f79c"; }
+
+.fa-glasses::before {
+  content: "\f530"; }
+
+.fa-globe::before {
+  content: "\f0ac"; }
+
+.fa-golf-ball-tee::before {
+  content: "\f450"; }
+
+.fa-golf-ball::before {
+  content: "\f450"; }
+
+.fa-gopuram::before {
+  content: "\f664"; }
+
+.fa-graduation-cap::before {
+  content: "\f19d"; }
+
+.fa-mortar-board::before {
+  content: "\f19d"; }
+
+.fa-greater-than::before {
+  content: "\3e"; }
+
+.fa-greater-than-equal::before {
+  content: "\f532"; }
+
+.fa-grip::before {
+  content: "\f58d"; }
+
+.fa-grip-horizontal::before {
+  content: "\f58d"; }
+
+.fa-grip-lines::before {
+  content: "\f7a4"; }
+
+.fa-grip-lines-vertical::before {
+  content: "\f7a5"; }
+
+.fa-grip-vertical::before {
+  content: "\f58e"; }
+
+.fa-guarani-sign::before {
+  content: "\e19a"; }
+
+.fa-guitar::before {
+  content: "\f7a6"; }
+
+.fa-gun::before {
+  content: "\e19b"; }
+
+.fa-h::before {
+  content: "\48"; }
+
+.fa-hammer::before {
+  content: "\f6e3"; }
+
+.fa-hamsa::before {
+  content: "\f665"; }
+
+.fa-hand::before {
+  content: "\f256"; }
+
+.fa-hand-paper::before {
+  content: "\f256"; }
+
+.fa-hand-back-fist::before {
+  content: "\f255"; }
+
+.fa-hand-rock::before {
+  content: "\f255"; }
+
+.fa-hand-dots::before {
+  content: "\f461"; }
+
+.fa-allergies::before {
+  content: "\f461"; }
+
+.fa-hand-fist::before {
+  content: "\f6de"; }
+
+.fa-fist-raised::before {
+  content: "\f6de"; }
+
+.fa-hand-holding::before {
+  content: "\f4bd"; }
+
+.fa-hand-holding-dollar::before {
+  content: "\f4c0"; }
+
+.fa-hand-holding-usd::before {
+  content: "\f4c0"; }
+
+.fa-hand-holding-droplet::before {
+  content: "\f4c1"; }
+
+.fa-hand-holding-water::before {
+  content: "\f4c1"; }
+
+.fa-hand-holding-heart::before {
+  content: "\f4be"; }
+
+.fa-hand-holding-medical::before {
+  content: "\e05c"; }
+
+.fa-hand-lizard::before {
+  content: "\f258"; }
+
+.fa-hand-middle-finger::before {
+  content: "\f806"; }
+
+.fa-hand-peace::before {
+  content: "\f25b"; }
+
+.fa-hand-point-down::before {
+  content: "\f0a7"; }
+
+.fa-hand-point-left::before {
+  content: "\f0a5"; }
+
+.fa-hand-point-right::before {
+  content: "\f0a4"; }
+
+.fa-hand-point-up::before {
+  content: "\f0a6"; }
+
+.fa-hand-pointer::before {
+  content: "\f25a"; }
+
+.fa-hand-scissors::before {
+  content: "\f257"; }
+
+.fa-hand-sparkles::before {
+  content: "\e05d"; }
+
+.fa-hand-spock::before {
+  content: "\f259"; }
+
+.fa-hands::before {
+  content: "\f2a7"; }
+
+.fa-sign-language::before {
+  content: "\f2a7"; }
+
+.fa-signing::before {
+  content: "\f2a7"; }
+
+.fa-hands-asl-interpreting::before {
+  content: "\f2a3"; }
+
+.fa-american-sign-language-interpreting::before {
+  content: "\f2a3"; }
+
+.fa-asl-interpreting::before {
+  content: "\f2a3"; }
+
+.fa-hands-american-sign-language-interpreting::before {
+  content: "\f2a3"; }
+
+.fa-hands-bubbles::before {
+  content: "\e05e"; }
+
+.fa-hands-wash::before {
+  content: "\e05e"; }
+
+.fa-hands-clapping::before {
+  content: "\e1a8"; }
+
+.fa-hands-holding::before {
+  content: "\f4c2"; }
+
+.fa-hands-praying::before {
+  content: "\f684"; }
+
+.fa-praying-hands::before {
+  content: "\f684"; }
+
+.fa-handshake::before {
+  content: "\f2b5"; }
+
+.fa-handshake-angle::before {
+  content: "\f4c4"; }
+
+.fa-hands-helping::before {
+  content: "\f4c4"; }
+
+.fa-handshake-simple-slash::before {
+  content: "\e05f"; }
+
+.fa-handshake-alt-slash::before {
+  content: "\e05f"; }
+
+.fa-handshake-slash::before {
+  content: "\e060"; }
+
+.fa-hanukiah::before {
+  content: "\f6e6"; }
+
+.fa-hard-drive::before {
+  content: "\f0a0"; }
+
+.fa-hdd::before {
+  content: "\f0a0"; }
+
+.fa-hashtag::before {
+  content: "\23"; }
+
+.fa-hat-cowboy::before {
+  content: "\f8c0"; }
+
+.fa-hat-cowboy-side::before {
+  content: "\f8c1"; }
+
+.fa-hat-wizard::before {
+  content: "\f6e8"; }
+
+.fa-head-side-cough::before {
+  content: "\e061"; }
+
+.fa-head-side-cough-slash::before {
+  content: "\e062"; }
+
+.fa-head-side-mask::before {
+  content: "\e063"; }
+
+.fa-head-side-virus::before {
+  content: "\e064"; }
+
+.fa-heading::before {
+  content: "\f1dc"; }
+
+.fa-header::before {
+  content: "\f1dc"; }
+
+.fa-headphones::before {
+  content: "\f025"; }
+
+.fa-headphones-simple::before {
+  content: "\f58f"; }
+
+.fa-headphones-alt::before {
+  content: "\f58f"; }
+
+.fa-headset::before {
+  content: "\f590"; }
+
+.fa-heart::before {
+  content: "\f004"; }
+
+.fa-heart-crack::before {
+  content: "\f7a9"; }
+
+.fa-heart-broken::before {
+  content: "\f7a9"; }
+
+.fa-heart-pulse::before {
+  content: "\f21e"; }
+
+.fa-heartbeat::before {
+  content: "\f21e"; }
+
+.fa-helicopter::before {
+  content: "\f533"; }
+
+.fa-helmet-safety::before {
+  content: "\f807"; }
+
+.fa-hard-hat::before {
+  content: "\f807"; }
+
+.fa-hat-hard::before {
+  content: "\f807"; }
+
+.fa-highlighter::before {
+  content: "\f591"; }
+
+.fa-hippo::before {
+  content: "\f6ed"; }
+
+.fa-hockey-puck::before {
+  content: "\f453"; }
+
+.fa-holly-berry::before {
+  content: "\f7aa"; }
+
+.fa-horse::before {
+  content: "\f6f0"; }
+
+.fa-horse-head::before {
+  content: "\f7ab"; }
+
+.fa-hospital::before {
+  content: "\f0f8"; }
+
+.fa-hospital-alt::before {
+  content: "\f0f8"; }
+
+.fa-hospital-wide::before {
+  content: "\f0f8"; }
+
+.fa-hospital-user::before {
+  content: "\f80d"; }
+
+.fa-hot-tub-person::before {
+  content: "\f593"; }
+
+.fa-hot-tub::before {
+  content: "\f593"; }
+
+.fa-hotdog::before {
+  content: "\f80f"; }
+
+.fa-hotel::before {
+  content: "\f594"; }
+
+.fa-hourglass::before {
+  content: "\f254"; }
+
+.fa-hourglass-2::before {
+  content: "\f254"; }
+
+.fa-hourglass-half::before {
+  content: "\f254"; }
+
+.fa-hourglass-empty::before {
+  content: "\f252"; }
+
+.fa-hourglass-end::before {
+  content: "\f253"; }
+
+.fa-hourglass-3::before {
+  content: "\f253"; }
+
+.fa-hourglass-start::before {
+  content: "\f251"; }
+
+.fa-hourglass-1::before {
+  content: "\f251"; }
+
+.fa-house::before {
+  content: "\f015"; }
+
+.fa-home::before {
+  content: "\f015"; }
+
+.fa-home-alt::before {
+  content: "\f015"; }
+
+.fa-home-lg-alt::before {
+  content: "\f015"; }
+
+.fa-house-chimney::before {
+  content: "\e3af"; }
+
+.fa-home-lg::before {
+  content: "\e3af"; }
+
+.fa-house-chimney-crack::before {
+  content: "\f6f1"; }
+
+.fa-house-damage::before {
+  content: "\f6f1"; }
+
+.fa-house-chimney-medical::before {
+  content: "\f7f2"; }
+
+.fa-clinic-medical::before {
+  content: "\f7f2"; }
+
+.fa-house-chimney-user::before {
+  content: "\e065"; }
+
+.fa-house-chimney-window::before {
+  content: "\e00d"; }
+
+.fa-house-crack::before {
+  content: "\e3b1"; }
+
+.fa-house-laptop::before {
+  content: "\e066"; }
+
+.fa-laptop-house::before {
+  content: "\e066"; }
+
+.fa-house-medical::before {
+  content: "\e3b2"; }
+
+.fa-house-user::before {
+  content: "\e1b0"; }
+
+.fa-home-user::before {
+  content: "\e1b0"; }
+
+.fa-hryvnia-sign::before {
+  content: "\f6f2"; }
+
+.fa-hryvnia::before {
+  content: "\f6f2"; }
+
+.fa-i::before {
+  content: "\49"; }
+
+.fa-i-cursor::before {
+  content: "\f246"; }
+
+.fa-ice-cream::before {
+  content: "\f810"; }
+
+.fa-icicles::before {
+  content: "\f7ad"; }
+
+.fa-icons::before {
+  content: "\f86d"; }
+
+.fa-heart-music-camera-bolt::before {
+  content: "\f86d"; }
+
+.fa-id-badge::before {
+  content: "\f2c1"; }
+
+.fa-id-card::before {
+  content: "\f2c2"; }
+
+.fa-drivers-license::before {
+  content: "\f2c2"; }
+
+.fa-id-card-clip::before {
+  content: "\f47f"; }
+
+.fa-id-card-alt::before {
+  content: "\f47f"; }
+
+.fa-igloo::before {
+  content: "\f7ae"; }
+
+.fa-image::before {
+  content: "\f03e"; }
+
+.fa-image-portrait::before {
+  content: "\f3e0"; }
+
+.fa-portrait::before {
+  content: "\f3e0"; }
+
+.fa-images::before {
+  content: "\f302"; }
+
+.fa-inbox::before {
+  content: "\f01c"; }
+
+.fa-indent::before {
+  content: "\f03c"; }
+
+.fa-indian-rupee-sign::before {
+  content: "\e1bc"; }
+
+.fa-indian-rupee::before {
+  content: "\e1bc"; }
+
+.fa-inr::before {
+  content: "\e1bc"; }
+
+.fa-industry::before {
+  content: "\f275"; }
+
+.fa-infinity::before {
+  content: "\f534"; }
+
+.fa-info::before {
+  content: "\f129"; }
+
+.fa-italic::before {
+  content: "\f033"; }
+
+.fa-j::before {
+  content: "\4a"; }
+
+.fa-jedi::before {
+  content: "\f669"; }
+
+.fa-jet-fighter::before {
+  content: "\f0fb"; }
+
+.fa-fighter-jet::before {
+  content: "\f0fb"; }
+
+.fa-joint::before {
+  content: "\f595"; }
+
+.fa-k::before {
+  content: "\4b"; }
+
+.fa-kaaba::before {
+  content: "\f66b"; }
+
+.fa-key::before {
+  content: "\f084"; }
+
+.fa-keyboard::before {
+  content: "\f11c"; }
+
+.fa-khanda::before {
+  content: "\f66d"; }
+
+.fa-kip-sign::before {
+  content: "\e1c4"; }
+
+.fa-kit-medical::before {
+  content: "\f479"; }
+
+.fa-first-aid::before {
+  content: "\f479"; }
+
+.fa-kiwi-bird::before {
+  content: "\f535"; }
+
+.fa-l::before {
+  content: "\4c"; }
+
+.fa-landmark::before {
+  content: "\f66f"; }
+
+.fa-language::before {
+  content: "\f1ab"; }
+
+.fa-laptop::before {
+  content: "\f109"; }
+
+.fa-laptop-code::before {
+  content: "\f5fc"; }
+
+.fa-laptop-medical::before {
+  content: "\f812"; }
+
+.fa-lari-sign::before {
+  content: "\e1c8"; }
+
+.fa-layer-group::before {
+  content: "\f5fd"; }
+
+.fa-leaf::before {
+  content: "\f06c"; }
+
+.fa-left-long::before {
+  content: "\f30a"; }
+
+.fa-long-arrow-alt-left::before {
+  content: "\f30a"; }
+
+.fa-left-right::before {
+  content: "\f337"; }
+
+.fa-arrows-alt-h::before {
+  content: "\f337"; }
+
+.fa-lemon::before {
+  content: "\f094"; }
+
+.fa-less-than::before {
+  content: "\3c"; }
+
+.fa-less-than-equal::before {
+  content: "\f537"; }
+
+.fa-life-ring::before {
+  content: "\f1cd"; }
+
+.fa-lightbulb::before {
+  content: "\f0eb"; }
+
+.fa-link::before {
+  content: "\f0c1"; }
+
+.fa-chain::before {
+  content: "\f0c1"; }
+
+.fa-link-slash::before {
+  content: "\f127"; }
+
+.fa-chain-broken::before {
+  content: "\f127"; }
+
+.fa-chain-slash::before {
+  content: "\f127"; }
+
+.fa-unlink::before {
+  content: "\f127"; }
+
+.fa-lira-sign::before {
+  content: "\f195"; }
+
+.fa-list::before {
+  content: "\f03a"; }
+
+.fa-list-squares::before {
+  content: "\f03a"; }
+
+.fa-list-check::before {
+  content: "\f0ae"; }
+
+.fa-tasks::before {
+  content: "\f0ae"; }
+
+.fa-list-ol::before {
+  content: "\f0cb"; }
+
+.fa-list-1-2::before {
+  content: "\f0cb"; }
+
+.fa-list-numeric::before {
+  content: "\f0cb"; }
+
+.fa-list-ul::before {
+  content: "\f0ca"; }
+
+.fa-list-dots::before {
+  content: "\f0ca"; }
+
+.fa-litecoin-sign::before {
+  content: "\e1d3"; }
+
+.fa-location-arrow::before {
+  content: "\f124"; }
+
+.fa-location-crosshairs::before {
+  content: "\f601"; }
+
+.fa-location::before {
+  content: "\f601"; }
+
+.fa-location-dot::before {
+  content: "\f3c5"; }
+
+.fa-map-marker-alt::before {
+  content: "\f3c5"; }
+
+.fa-location-pin::before {
+  content: "\f041"; }
+
+.fa-map-marker::before {
+  content: "\f041"; }
+
+.fa-lock::before {
+  content: "\f023"; }
+
+.fa-lock-open::before {
+  content: "\f3c1"; }
+
+.fa-lungs::before {
+  content: "\f604"; }
+
+.fa-lungs-virus::before {
+  content: "\e067"; }
+
+.fa-m::before {
+  content: "\4d"; }
+
+.fa-magnet::before {
+  content: "\f076"; }
+
+.fa-magnifying-glass::before {
+  content: "\f002"; }
+
+.fa-search::before {
+  content: "\f002"; }
+
+.fa-magnifying-glass-dollar::before {
+  content: "\f688"; }
+
+.fa-search-dollar::before {
+  content: "\f688"; }
+
+.fa-magnifying-glass-location::before {
+  content: "\f689"; }
+
+.fa-search-location::before {
+  content: "\f689"; }
+
+.fa-magnifying-glass-minus::before {
+  content: "\f010"; }
+
+.fa-search-minus::before {
+  content: "\f010"; }
+
+.fa-magnifying-glass-plus::before {
+  content: "\f00e"; }
+
+.fa-search-plus::before {
+  content: "\f00e"; }
+
+.fa-manat-sign::before {
+  content: "\e1d5"; }
+
+.fa-map::before {
+  content: "\f279"; }
+
+.fa-map-location::before {
+  content: "\f59f"; }
+
+.fa-map-marked::before {
+  content: "\f59f"; }
+
+.fa-map-location-dot::before {
+  content: "\f5a0"; }
+
+.fa-map-marked-alt::before {
+  content: "\f5a0"; }
+
+.fa-map-pin::before {
+  content: "\f276"; }
+
+.fa-marker::before {
+  content: "\f5a1"; }
+
+.fa-mars::before {
+  content: "\f222"; }
+
+.fa-mars-and-venus::before {
+  content: "\f224"; }
+
+.fa-mars-double::before {
+  content: "\f227"; }
+
+.fa-mars-stroke::before {
+  content: "\f229"; }
+
+.fa-mars-stroke-right::before {
+  content: "\f22b"; }
+
+.fa-mars-stroke-h::before {
+  content: "\f22b"; }
+
+.fa-mars-stroke-up::before {
+  content: "\f22a"; }
+
+.fa-mars-stroke-v::before {
+  content: "\f22a"; }
+
+.fa-martini-glass::before {
+  content: "\f57b"; }
+
+.fa-glass-martini-alt::before {
+  content: "\f57b"; }
+
+.fa-martini-glass-citrus::before {
+  content: "\f561"; }
+
+.fa-cocktail::before {
+  content: "\f561"; }
+
+.fa-martini-glass-empty::before {
+  content: "\f000"; }
+
+.fa-glass-martini::before {
+  content: "\f000"; }
+
+.fa-mask::before {
+  content: "\f6fa"; }
+
+.fa-mask-face::before {
+  content: "\e1d7"; }
+
+.fa-masks-theater::before {
+  content: "\f630"; }
+
+.fa-theater-masks::before {
+  content: "\f630"; }
+
+.fa-maximize::before {
+  content: "\f31e"; }
+
+.fa-expand-arrows-alt::before {
+  content: "\f31e"; }
+
+.fa-medal::before {
+  content: "\f5a2"; }
+
+.fa-memory::before {
+  content: "\f538"; }
+
+.fa-menorah::before {
+  content: "\f676"; }
+
+.fa-mercury::before {
+  content: "\f223"; }
+
+.fa-message::before {
+  content: "\f27a"; }
+
+.fa-comment-alt::before {
+  content: "\f27a"; }
+
+.fa-meteor::before {
+  content: "\f753"; }
+
+.fa-microchip::before {
+  content: "\f2db"; }
+
+.fa-microphone::before {
+  content: "\f130"; }
+
+.fa-microphone-lines::before {
+  content: "\f3c9"; }
+
+.fa-microphone-alt::before {
+  content: "\f3c9"; }
+
+.fa-microphone-lines-slash::before {
+  content: "\f539"; }
+
+.fa-microphone-alt-slash::before {
+  content: "\f539"; }
+
+.fa-microphone-slash::before {
+  content: "\f131"; }
+
+.fa-microscope::before {
+  content: "\f610"; }
+
+.fa-mill-sign::before {
+  content: "\e1ed"; }
+
+.fa-minimize::before {
+  content: "\f78c"; }
+
+.fa-compress-arrows-alt::before {
+  content: "\f78c"; }
+
+.fa-minus::before {
+  content: "\f068"; }
+
+.fa-subtract::before {
+  content: "\f068"; }
+
+.fa-mitten::before {
+  content: "\f7b5"; }
+
+.fa-mobile::before {
+  content: "\f3ce"; }
+
+.fa-mobile-android::before {
+  content: "\f3ce"; }
+
+.fa-mobile-phone::before {
+  content: "\f3ce"; }
+
+.fa-mobile-button::before {
+  content: "\f10b"; }
+
+.fa-mobile-screen-button::before {
+  content: "\f3cd"; }
+
+.fa-mobile-alt::before {
+  content: "\f3cd"; }
+
+.fa-money-bill::before {
+  content: "\f0d6"; }
+
+.fa-money-bill-1::before {
+  content: "\f3d1"; }
+
+.fa-money-bill-alt::before {
+  content: "\f3d1"; }
+
+.fa-money-bill-1-wave::before {
+  content: "\f53b"; }
+
+.fa-money-bill-wave-alt::before {
+  content: "\f53b"; }
+
+.fa-money-bill-wave::before {
+  content: "\f53a"; }
+
+.fa-money-check::before {
+  content: "\f53c"; }
+
+.fa-money-check-dollar::before {
+  content: "\f53d"; }
+
+.fa-money-check-alt::before {
+  content: "\f53d"; }
+
+.fa-monument::before {
+  content: "\f5a6"; }
+
+.fa-moon::before {
+  content: "\f186"; }
+
+.fa-mortar-pestle::before {
+  content: "\f5a7"; }
+
+.fa-mosque::before {
+  content: "\f678"; }
+
+.fa-motorcycle::before {
+  content: "\f21c"; }
+
+.fa-mountain::before {
+  content: "\f6fc"; }
+
+.fa-mug-hot::before {
+  content: "\f7b6"; }
+
+.fa-mug-saucer::before {
+  content: "\f0f4"; }
+
+.fa-coffee::before {
+  content: "\f0f4"; }
+
+.fa-music::before {
+  content: "\f001"; }
+
+.fa-n::before {
+  content: "\4e"; }
+
+.fa-naira-sign::before {
+  content: "\e1f6"; }
+
+.fa-network-wired::before {
+  content: "\f6ff"; }
+
+.fa-neuter::before {
+  content: "\f22c"; }
+
+.fa-newspaper::before {
+  content: "\f1ea"; }
+
+.fa-not-equal::before {
+  content: "\f53e"; }
+
+.fa-note-sticky::before {
+  content: "\f249"; }
+
+.fa-sticky-note::before {
+  content: "\f249"; }
+
+.fa-notes-medical::before {
+  content: "\f481"; }
+
+.fa-o::before {
+  content: "\4f"; }
+
+.fa-object-group::before {
+  content: "\f247"; }
+
+.fa-object-ungroup::before {
+  content: "\f248"; }
+
+.fa-oil-can::before {
+  content: "\f613"; }
+
+.fa-om::before {
+  content: "\f679"; }
+
+.fa-otter::before {
+  content: "\f700"; }
+
+.fa-outdent::before {
+  content: "\f03b"; }
+
+.fa-dedent::before {
+  content: "\f03b"; }
+
+.fa-p::before {
+  content: "\50"; }
+
+.fa-pager::before {
+  content: "\f815"; }
+
+.fa-paint-roller::before {
+  content: "\f5aa"; }
+
+.fa-paintbrush::before {
+  content: "\f1fc"; }
+
+.fa-paint-brush::before {
+  content: "\f1fc"; }
+
+.fa-palette::before {
+  content: "\f53f"; }
+
+.fa-pallet::before {
+  content: "\f482"; }
+
+.fa-panorama::before {
+  content: "\e209"; }
+
+.fa-paper-plane::before {
+  content: "\f1d8"; }
+
+.fa-paperclip::before {
+  content: "\f0c6"; }
+
+.fa-parachute-box::before {
+  content: "\f4cd"; }
+
+.fa-paragraph::before {
+  content: "\f1dd"; }
+
+.fa-passport::before {
+  content: "\f5ab"; }
+
+.fa-paste::before {
+  content: "\f0ea"; }
+
+.fa-file-clipboard::before {
+  content: "\f0ea"; }
+
+.fa-pause::before {
+  content: "\f04c"; }
+
+.fa-paw::before {
+  content: "\f1b0"; }
+
+.fa-peace::before {
+  content: "\f67c"; }
+
+.fa-pen::before {
+  content: "\f304"; }
+
+.fa-pen-clip::before {
+  content: "\f305"; }
+
+.fa-pen-alt::before {
+  content: "\f305"; }
+
+.fa-pen-fancy::before {
+  content: "\f5ac"; }
+
+.fa-pen-nib::before {
+  content: "\f5ad"; }
+
+.fa-pen-ruler::before {
+  content: "\f5ae"; }
+
+.fa-pencil-ruler::before {
+  content: "\f5ae"; }
+
+.fa-pen-to-square::before {
+  content: "\f044"; }
+
+.fa-edit::before {
+  content: "\f044"; }
+
+.fa-pencil::before {
+  content: "\f303"; }
+
+.fa-pencil-alt::before {
+  content: "\f303"; }
+
+.fa-people-arrows-left-right::before {
+  content: "\e068"; }
+
+.fa-people-arrows::before {
+  content: "\e068"; }
+
+.fa-people-carry-box::before {
+  content: "\f4ce"; }
+
+.fa-people-carry::before {
+  content: "\f4ce"; }
+
+.fa-pepper-hot::before {
+  content: "\f816"; }
+
+.fa-percent::before {
+  content: "\25"; }
+
+.fa-percentage::before {
+  content: "\25"; }
+
+.fa-person::before {
+  content: "\f183"; }
+
+.fa-male::before {
+  content: "\f183"; }
+
+.fa-person-biking::before {
+  content: "\f84a"; }
+
+.fa-biking::before {
+  content: "\f84a"; }
+
+.fa-person-booth::before {
+  content: "\f756"; }
+
+.fa-person-dots-from-line::before {
+  content: "\f470"; }
+
+.fa-diagnoses::before {
+  content: "\f470"; }
+
+.fa-person-dress::before {
+  content: "\f182"; }
+
+.fa-female::before {
+  content: "\f182"; }
+
+.fa-person-hiking::before {
+  content: "\f6ec"; }
+
+.fa-hiking::before {
+  content: "\f6ec"; }
+
+.fa-person-praying::before {
+  content: "\f683"; }
+
+.fa-pray::before {
+  content: "\f683"; }
+
+.fa-person-running::before {
+  content: "\f70c"; }
+
+.fa-running::before {
+  content: "\f70c"; }
+
+.fa-person-skating::before {
+  content: "\f7c5"; }
+
+.fa-skating::before {
+  content: "\f7c5"; }
+
+.fa-person-skiing::before {
+  content: "\f7c9"; }
+
+.fa-skiing::before {
+  content: "\f7c9"; }
+
+.fa-person-skiing-nordic::before {
+  content: "\f7ca"; }
+
+.fa-skiing-nordic::before {
+  content: "\f7ca"; }
+
+.fa-person-snowboarding::before {
+  content: "\f7ce"; }
+
+.fa-snowboarding::before {
+  content: "\f7ce"; }
+
+.fa-person-swimming::before {
+  content: "\f5c4"; }
+
+.fa-swimmer::before {
+  content: "\f5c4"; }
+
+.fa-person-walking::before {
+  content: "\f554"; }
+
+.fa-walking::before {
+  content: "\f554"; }
+
+.fa-person-walking-with-cane::before {
+  content: "\f29d"; }
+
+.fa-blind::before {
+  content: "\f29d"; }
+
+.fa-peseta-sign::before {
+  content: "\e221"; }
+
+.fa-peso-sign::before {
+  content: "\e222"; }
+
+.fa-phone::before {
+  content: "\f095"; }
+
+.fa-phone-flip::before {
+  content: "\f879"; }
+
+.fa-phone-alt::before {
+  content: "\f879"; }
+
+.fa-phone-slash::before {
+  content: "\f3dd"; }
+
+.fa-phone-volume::before {
+  content: "\f2a0"; }
+
+.fa-volume-control-phone::before {
+  content: "\f2a0"; }
+
+.fa-photo-film::before {
+  content: "\f87c"; }
+
+.fa-photo-video::before {
+  content: "\f87c"; }
+
+.fa-piggy-bank::before {
+  content: "\f4d3"; }
+
+.fa-pills::before {
+  content: "\f484"; }
+
+.fa-pizza-slice::before {
+  content: "\f818"; }
+
+.fa-place-of-worship::before {
+  content: "\f67f"; }
+
+.fa-plane::before {
+  content: "\f072"; }
+
+.fa-plane-arrival::before {
+  content: "\f5af"; }
+
+.fa-plane-departure::before {
+  content: "\f5b0"; }
+
+.fa-plane-slash::before {
+  content: "\e069"; }
+
+.fa-play::before {
+  content: "\f04b"; }
+
+.fa-plug::before {
+  content: "\f1e6"; }
+
+.fa-plus::before {
+  content: "\2b"; }
+
+.fa-add::before {
+  content: "\2b"; }
+
+.fa-plus-minus::before {
+  content: "\e43c"; }
+
+.fa-podcast::before {
+  content: "\f2ce"; }
+
+.fa-poo::before {
+  content: "\f2fe"; }
+
+.fa-poo-storm::before {
+  content: "\f75a"; }
+
+.fa-poo-bolt::before {
+  content: "\f75a"; }
+
+.fa-poop::before {
+  content: "\f619"; }
+
+.fa-power-off::before {
+  content: "\f011"; }
+
+.fa-prescription::before {
+  content: "\f5b1"; }
+
+.fa-prescription-bottle::before {
+  content: "\f485"; }
+
+.fa-prescription-bottle-medical::before {
+  content: "\f486"; }
+
+.fa-prescription-bottle-alt::before {
+  content: "\f486"; }
+
+.fa-print::before {
+  content: "\f02f"; }
+
+.fa-pump-medical::before {
+  content: "\e06a"; }
+
+.fa-pump-soap::before {
+  content: "\e06b"; }
+
+.fa-puzzle-piece::before {
+  content: "\f12e"; }
+
+.fa-q::before {
+  content: "\51"; }
+
+.fa-qrcode::before {
+  content: "\f029"; }
+
+.fa-question::before {
+  content: "\3f"; }
+
+.fa-quote-left::before {
+  content: "\f10d"; }
+
+.fa-quote-left-alt::before {
+  content: "\f10d"; }
+
+.fa-quote-right::before {
+  content: "\f10e"; }
+
+.fa-quote-right-alt::before {
+  content: "\f10e"; }
+
+.fa-r::before {
+  content: "\52"; }
+
+.fa-radiation::before {
+  content: "\f7b9"; }
+
+.fa-rainbow::before {
+  content: "\f75b"; }
+
+.fa-receipt::before {
+  content: "\f543"; }
+
+.fa-record-vinyl::before {
+  content: "\f8d9"; }
+
+.fa-rectangle-ad::before {
+  content: "\f641"; }
+
+.fa-ad::before {
+  content: "\f641"; }
+
+.fa-rectangle-list::before {
+  content: "\f022"; }
+
+.fa-list-alt::before {
+  content: "\f022"; }
+
+.fa-rectangle-xmark::before {
+  content: "\f410"; }
+
+.fa-rectangle-times::before {
+  content: "\f410"; }
+
+.fa-times-rectangle::before {
+  content: "\f410"; }
+
+.fa-window-close::before {
+  content: "\f410"; }
+
+.fa-recycle::before {
+  content: "\f1b8"; }
+
+.fa-registered::before {
+  content: "\f25d"; }
+
+.fa-repeat::before {
+  content: "\f363"; }
+
+.fa-reply::before {
+  content: "\f3e5"; }
+
+.fa-mail-reply::before {
+  content: "\f3e5"; }
+
+.fa-reply-all::before {
+  content: "\f122"; }
+
+.fa-mail-reply-all::before {
+  content: "\f122"; }
+
+.fa-republican::before {
+  content: "\f75e"; }
+
+.fa-restroom::before {
+  content: "\f7bd"; }
+
+.fa-retweet::before {
+  content: "\f079"; }
+
+.fa-ribbon::before {
+  content: "\f4d6"; }
+
+.fa-right-from-bracket::before {
+  content: "\f2f5"; }
+
+.fa-sign-out-alt::before {
+  content: "\f2f5"; }
+
+.fa-right-left::before {
+  content: "\f362"; }
+
+.fa-exchange-alt::before {
+  content: "\f362"; }
+
+.fa-right-long::before {
+  content: "\f30b"; }
+
+.fa-long-arrow-alt-right::before {
+  content: "\f30b"; }
+
+.fa-right-to-bracket::before {
+  content: "\f2f6"; }
+
+.fa-sign-in-alt::before {
+  content: "\f2f6"; }
+
+.fa-ring::before {
+  content: "\f70b"; }
+
+.fa-road::before {
+  content: "\f018"; }
+
+.fa-robot::before {
+  content: "\f544"; }
+
+.fa-rocket::before {
+  content: "\f135"; }
+
+.fa-rotate::before {
+  content: "\f2f1"; }
+
+.fa-sync-alt::before {
+  content: "\f2f1"; }
+
+.fa-rotate-left::before {
+  content: "\f2ea"; }
+
+.fa-rotate-back::before {
+  content: "\f2ea"; }
+
+.fa-rotate-backward::before {
+  content: "\f2ea"; }
+
+.fa-undo-alt::before {
+  content: "\f2ea"; }
+
+.fa-rotate-right::before {
+  content: "\f2f9"; }
+
+.fa-redo-alt::before {
+  content: "\f2f9"; }
+
+.fa-rotate-forward::before {
+  content: "\f2f9"; }
+
+.fa-route::before {
+  content: "\f4d7"; }
+
+.fa-rss::before {
+  content: "\f09e"; }
+
+.fa-feed::before {
+  content: "\f09e"; }
+
+.fa-ruble-sign::before {
+  content: "\f158"; }
+
+.fa-rouble::before {
+  content: "\f158"; }
+
+.fa-rub::before {
+  content: "\f158"; }
+
+.fa-ruble::before {
+  content: "\f158"; }
+
+.fa-ruler::before {
+  content: "\f545"; }
+
+.fa-ruler-combined::before {
+  content: "\f546"; }
+
+.fa-ruler-horizontal::before {
+  content: "\f547"; }
+
+.fa-ruler-vertical::before {
+  content: "\f548"; }
+
+.fa-rupee-sign::before {
+  content: "\f156"; }
+
+.fa-rupee::before {
+  content: "\f156"; }
+
+.fa-rupiah-sign::before {
+  content: "\e23d"; }
+
+.fa-s::before {
+  content: "\53"; }
+
+.fa-sailboat::before {
+  content: "\e445"; }
+
+.fa-satellite::before {
+  content: "\f7bf"; }
+
+.fa-satellite-dish::before {
+  content: "\f7c0"; }
+
+.fa-scale-balanced::before {
+  content: "\f24e"; }
+
+.fa-balance-scale::before {
+  content: "\f24e"; }
+
+.fa-scale-unbalanced::before {
+  content: "\f515"; }
+
+.fa-balance-scale-left::before {
+  content: "\f515"; }
+
+.fa-scale-unbalanced-flip::before {
+  content: "\f516"; }
+
+.fa-balance-scale-right::before {
+  content: "\f516"; }
+
+.fa-school::before {
+  content: "\f549"; }
+
+.fa-scissors::before {
+  content: "\f0c4"; }
+
+.fa-cut::before {
+  content: "\f0c4"; }
+
+.fa-screwdriver::before {
+  content: "\f54a"; }
+
+.fa-screwdriver-wrench::before {
+  content: "\f7d9"; }
+
+.fa-tools::before {
+  content: "\f7d9"; }
+
+.fa-scroll::before {
+  content: "\f70e"; }
+
+.fa-scroll-torah::before {
+  content: "\f6a0"; }
+
+.fa-torah::before {
+  content: "\f6a0"; }
+
+.fa-sd-card::before {
+  content: "\f7c2"; }
+
+.fa-section::before {
+  content: "\e447"; }
+
+.fa-seedling::before {
+  content: "\f4d8"; }
+
+.fa-sprout::before {
+  content: "\f4d8"; }
+
+.fa-server::before {
+  content: "\f233"; }
+
+.fa-shapes::before {
+  content: "\f61f"; }
+
+.fa-triangle-circle-square::before {
+  content: "\f61f"; }
+
+.fa-share::before {
+  content: "\f064"; }
+
+.fa-arrow-turn-right::before {
+  content: "\f064"; }
+
+.fa-mail-forward::before {
+  content: "\f064"; }
+
+.fa-share-from-square::before {
+  content: "\f14d"; }
+
+.fa-share-square::before {
+  content: "\f14d"; }
+
+.fa-share-nodes::before {
+  content: "\f1e0"; }
+
+.fa-share-alt::before {
+  content: "\f1e0"; }
+
+.fa-shekel-sign::before {
+  content: "\f20b"; }
+
+.fa-ils::before {
+  content: "\f20b"; }
+
+.fa-shekel::before {
+  content: "\f20b"; }
+
+.fa-sheqel::before {
+  content: "\f20b"; }
+
+.fa-sheqel-sign::before {
+  content: "\f20b"; }
+
+.fa-shield::before {
+  content: "\f132"; }
+
+.fa-shield-blank::before {
+  content: "\f3ed"; }
+
+.fa-shield-alt::before {
+  content: "\f3ed"; }
+
+.fa-shield-virus::before {
+  content: "\e06c"; }
+
+.fa-ship::before {
+  content: "\f21a"; }
+
+.fa-shirt::before {
+  content: "\f553"; }
+
+.fa-t-shirt::before {
+  content: "\f553"; }
+
+.fa-tshirt::before {
+  content: "\f553"; }
+
+.fa-shoe-prints::before {
+  content: "\f54b"; }
+
+.fa-shop::before {
+  content: "\f54f"; }
+
+.fa-store-alt::before {
+  content: "\f54f"; }
+
+.fa-shop-slash::before {
+  content: "\e070"; }
+
+.fa-store-alt-slash::before {
+  content: "\e070"; }
+
+.fa-shower::before {
+  content: "\f2cc"; }
+
+.fa-shrimp::before {
+  content: "\e448"; }
+
+.fa-shuffle::before {
+  content: "\f074"; }
+
+.fa-random::before {
+  content: "\f074"; }
+
+.fa-shuttle-space::before {
+  content: "\f197"; }
+
+.fa-space-shuttle::before {
+  content: "\f197"; }
+
+.fa-sign-hanging::before {
+  content: "\f4d9"; }
+
+.fa-sign::before {
+  content: "\f4d9"; }
+
+.fa-signal::before {
+  content: "\f012"; }
+
+.fa-signal-5::before {
+  content: "\f012"; }
+
+.fa-signal-perfect::before {
+  content: "\f012"; }
+
+.fa-signature::before {
+  content: "\f5b7"; }
+
+.fa-signs-post::before {
+  content: "\f277"; }
+
+.fa-map-signs::before {
+  content: "\f277"; }
+
+.fa-sim-card::before {
+  content: "\f7c4"; }
+
+.fa-sink::before {
+  content: "\e06d"; }
+
+.fa-sitemap::before {
+  content: "\f0e8"; }
+
+.fa-skull::before {
+  content: "\f54c"; }
+
+.fa-skull-crossbones::before {
+  content: "\f714"; }
+
+.fa-slash::before {
+  content: "\f715"; }
+
+.fa-sleigh::before {
+  content: "\f7cc"; }
+
+.fa-sliders::before {
+  content: "\f1de"; }
+
+.fa-sliders-h::before {
+  content: "\f1de"; }
+
+.fa-smog::before {
+  content: "\f75f"; }
+
+.fa-smoking::before {
+  content: "\f48d"; }
+
+.fa-snowflake::before {
+  content: "\f2dc"; }
+
+.fa-snowman::before {
+  content: "\f7d0"; }
+
+.fa-snowplow::before {
+  content: "\f7d2"; }
+
+.fa-soap::before {
+  content: "\e06e"; }
+
+.fa-socks::before {
+  content: "\f696"; }
+
+.fa-solar-panel::before {
+  content: "\f5ba"; }
+
+.fa-sort::before {
+  content: "\f0dc"; }
+
+.fa-unsorted::before {
+  content: "\f0dc"; }
+
+.fa-sort-down::before {
+  content: "\f0dd"; }
+
+.fa-sort-desc::before {
+  content: "\f0dd"; }
+
+.fa-sort-up::before {
+  content: "\f0de"; }
+
+.fa-sort-asc::before {
+  content: "\f0de"; }
+
+.fa-spa::before {
+  content: "\f5bb"; }
+
+.fa-spaghetti-monster-flying::before {
+  content: "\f67b"; }
+
+.fa-pastafarianism::before {
+  content: "\f67b"; }
+
+.fa-spell-check::before {
+  content: "\f891"; }
+
+.fa-spider::before {
+  content: "\f717"; }
+
+.fa-spinner::before {
+  content: "\f110"; }
+
+.fa-splotch::before {
+  content: "\f5bc"; }
+
+.fa-spoon::before {
+  content: "\f2e5"; }
+
+.fa-utensil-spoon::before {
+  content: "\f2e5"; }
+
+.fa-spray-can::before {
+  content: "\f5bd"; }
+
+.fa-spray-can-sparkles::before {
+  content: "\f5d0"; }
+
+.fa-air-freshener::before {
+  content: "\f5d0"; }
+
+.fa-square::before {
+  content: "\f0c8"; }
+
+.fa-square-arrow-up-right::before {
+  content: "\f14c"; }
+
+.fa-external-link-square::before {
+  content: "\f14c"; }
+
+.fa-square-caret-down::before {
+  content: "\f150"; }
+
+.fa-caret-square-down::before {
+  content: "\f150"; }
+
+.fa-square-caret-left::before {
+  content: "\f191"; }
+
+.fa-caret-square-left::before {
+  content: "\f191"; }
+
+.fa-square-caret-right::before {
+  content: "\f152"; }
+
+.fa-caret-square-right::before {
+  content: "\f152"; }
+
+.fa-square-caret-up::before {
+  content: "\f151"; }
+
+.fa-caret-square-up::before {
+  content: "\f151"; }
+
+.fa-square-check::before {
+  content: "\f14a"; }
+
+.fa-check-square::before {
+  content: "\f14a"; }
+
+.fa-square-envelope::before {
+  content: "\f199"; }
+
+.fa-envelope-square::before {
+  content: "\f199"; }
+
+.fa-square-full::before {
+  content: "\f45c"; }
+
+.fa-square-h::before {
+  content: "\f0fd"; }
+
+.fa-h-square::before {
+  content: "\f0fd"; }
+
+.fa-square-minus::before {
+  content: "\f146"; }
+
+.fa-minus-square::before {
+  content: "\f146"; }
+
+.fa-square-parking::before {
+  content: "\f540"; }
+
+.fa-parking::before {
+  content: "\f540"; }
+
+.fa-square-pen::before {
+  content: "\f14b"; }
+
+.fa-pen-square::before {
+  content: "\f14b"; }
+
+.fa-pencil-square::before {
+  content: "\f14b"; }
+
+.fa-square-phone::before {
+  content: "\f098"; }
+
+.fa-phone-square::before {
+  content: "\f098"; }
+
+.fa-square-phone-flip::before {
+  content: "\f87b"; }
+
+.fa-phone-square-alt::before {
+  content: "\f87b"; }
+
+.fa-square-plus::before {
+  content: "\f0fe"; }
+
+.fa-plus-square::before {
+  content: "\f0fe"; }
+
+.fa-square-poll-horizontal::before {
+  content: "\f682"; }
+
+.fa-poll-h::before {
+  content: "\f682"; }
+
+.fa-square-poll-vertical::before {
+  content: "\f681"; }
+
+.fa-poll::before {
+  content: "\f681"; }
+
+.fa-square-root-variable::before {
+  content: "\f698"; }
+
+.fa-square-root-alt::before {
+  content: "\f698"; }
+
+.fa-square-rss::before {
+  content: "\f143"; }
+
+.fa-rss-square::before {
+  content: "\f143"; }
+
+.fa-square-share-nodes::before {
+  content: "\f1e1"; }
+
+.fa-share-alt-square::before {
+  content: "\f1e1"; }
+
+.fa-square-up-right::before {
+  content: "\f360"; }
+
+.fa-external-link-square-alt::before {
+  content: "\f360"; }
+
+.fa-square-xmark::before {
+  content: "\f2d3"; }
+
+.fa-times-square::before {
+  content: "\f2d3"; }
+
+.fa-xmark-square::before {
+  content: "\f2d3"; }
+
+.fa-stairs::before {
+  content: "\e289"; }
+
+.fa-stamp::before {
+  content: "\f5bf"; }
+
+.fa-star::before {
+  content: "\f005"; }
+
+.fa-star-and-crescent::before {
+  content: "\f699"; }
+
+.fa-star-half::before {
+  content: "\f089"; }
+
+.fa-star-half-stroke::before {
+  content: "\f5c0"; }
+
+.fa-star-half-alt::before {
+  content: "\f5c0"; }
+
+.fa-star-of-david::before {
+  content: "\f69a"; }
+
+.fa-star-of-life::before {
+  content: "\f621"; }
+
+.fa-sterling-sign::before {
+  content: "\f154"; }
+
+.fa-gbp::before {
+  content: "\f154"; }
+
+.fa-pound-sign::before {
+  content: "\f154"; }
+
+.fa-stethoscope::before {
+  content: "\f0f1"; }
+
+.fa-stop::before {
+  content: "\f04d"; }
+
+.fa-stopwatch::before {
+  content: "\f2f2"; }
+
+.fa-stopwatch-20::before {
+  content: "\e06f"; }
+
+.fa-store::before {
+  content: "\f54e"; }
+
+.fa-store-slash::before {
+  content: "\e071"; }
+
+.fa-street-view::before {
+  content: "\f21d"; }
+
+.fa-strikethrough::before {
+  content: "\f0cc"; }
+
+.fa-stroopwafel::before {
+  content: "\f551"; }
+
+.fa-subscript::before {
+  content: "\f12c"; }
+
+.fa-suitcase::before {
+  content: "\f0f2"; }
+
+.fa-suitcase-medical::before {
+  content: "\f0fa"; }
+
+.fa-medkit::before {
+  content: "\f0fa"; }
+
+.fa-suitcase-rolling::before {
+  content: "\f5c1"; }
+
+.fa-sun::before {
+  content: "\f185"; }
+
+.fa-superscript::before {
+  content: "\f12b"; }
+
+.fa-swatchbook::before {
+  content: "\f5c3"; }
+
+.fa-synagogue::before {
+  content: "\f69b"; }
+
+.fa-syringe::before {
+  content: "\f48e"; }
+
+.fa-t::before {
+  content: "\54"; }
+
+.fa-table::before {
+  content: "\f0ce"; }
+
+.fa-table-cells::before {
+  content: "\f00a"; }
+
+.fa-th::before {
+  content: "\f00a"; }
+
+.fa-table-cells-large::before {
+  content: "\f009"; }
+
+.fa-th-large::before {
+  content: "\f009"; }
+
+.fa-table-columns::before {
+  content: "\f0db"; }
+
+.fa-columns::before {
+  content: "\f0db"; }
+
+.fa-table-list::before {
+  content: "\f00b"; }
+
+.fa-th-list::before {
+  content: "\f00b"; }
+
+.fa-table-tennis-paddle-ball::before {
+  content: "\f45d"; }
+
+.fa-ping-pong-paddle-ball::before {
+  content: "\f45d"; }
+
+.fa-table-tennis::before {
+  content: "\f45d"; }
+
+.fa-tablet::before {
+  content: "\f3fb"; }
+
+.fa-tablet-android::before {
+  content: "\f3fb"; }
+
+.fa-tablet-button::before {
+  content: "\f10a"; }
+
+.fa-tablet-screen-button::before {
+  content: "\f3fa"; }
+
+.fa-tablet-alt::before {
+  content: "\f3fa"; }
+
+.fa-tablets::before {
+  content: "\f490"; }
+
+.fa-tachograph-digital::before {
+  content: "\f566"; }
+
+.fa-digital-tachograph::before {
+  content: "\f566"; }
+
+.fa-tag::before {
+  content: "\f02b"; }
+
+.fa-tags::before {
+  content: "\f02c"; }
+
+.fa-tape::before {
+  content: "\f4db"; }
+
+.fa-taxi::before {
+  content: "\f1ba"; }
+
+.fa-cab::before {
+  content: "\f1ba"; }
+
+.fa-teeth::before {
+  content: "\f62e"; }
+
+.fa-teeth-open::before {
+  content: "\f62f"; }
+
+.fa-temperature-empty::before {
+  content: "\f2cb"; }
+
+.fa-temperature-0::before {
+  content: "\f2cb"; }
+
+.fa-thermometer-0::before {
+  content: "\f2cb"; }
+
+.fa-thermometer-empty::before {
+  content: "\f2cb"; }
+
+.fa-temperature-full::before {
+  content: "\f2c7"; }
+
+.fa-temperature-4::before {
+  content: "\f2c7"; }
+
+.fa-thermometer-4::before {
+  content: "\f2c7"; }
+
+.fa-thermometer-full::before {
+  content: "\f2c7"; }
+
+.fa-temperature-half::before {
+  content: "\f2c9"; }
+
+.fa-temperature-2::before {
+  content: "\f2c9"; }
+
+.fa-thermometer-2::before {
+  content: "\f2c9"; }
+
+.fa-thermometer-half::before {
+  content: "\f2c9"; }
+
+.fa-temperature-high::before {
+  content: "\f769"; }
+
+.fa-temperature-low::before {
+  content: "\f76b"; }
+
+.fa-temperature-quarter::before {
+  content: "\f2ca"; }
+
+.fa-temperature-1::before {
+  content: "\f2ca"; }
+
+.fa-thermometer-1::before {
+  content: "\f2ca"; }
+
+.fa-thermometer-quarter::before {
+  content: "\f2ca"; }
+
+.fa-temperature-three-quarters::before {
+  content: "\f2c8"; }
+
+.fa-temperature-3::before {
+  content: "\f2c8"; }
+
+.fa-thermometer-3::before {
+  content: "\f2c8"; }
+
+.fa-thermometer-three-quarters::before {
+  content: "\f2c8"; }
+
+.fa-tenge-sign::before {
+  content: "\f7d7"; }
+
+.fa-tenge::before {
+  content: "\f7d7"; }
+
+.fa-terminal::before {
+  content: "\f120"; }
+
+.fa-text-height::before {
+  content: "\f034"; }
+
+.fa-text-slash::before {
+  content: "\f87d"; }
+
+.fa-remove-format::before {
+  content: "\f87d"; }
+
+.fa-text-width::before {
+  content: "\f035"; }
+
+.fa-thermometer::before {
+  content: "\f491"; }
+
+.fa-thumbs-down::before {
+  content: "\f165"; }
+
+.fa-thumbs-up::before {
+  content: "\f164"; }
+
+.fa-thumbtack::before {
+  content: "\f08d"; }
+
+.fa-thumb-tack::before {
+  content: "\f08d"; }
+
+.fa-ticket::before {
+  content: "\f145"; }
+
+.fa-ticket-simple::before {
+  content: "\f3ff"; }
+
+.fa-ticket-alt::before {
+  content: "\f3ff"; }
+
+.fa-timeline::before {
+  content: "\e29c"; }
+
+.fa-toggle-off::before {
+  content: "\f204"; }
+
+.fa-toggle-on::before {
+  content: "\f205"; }
+
+.fa-toilet::before {
+  content: "\f7d8"; }
+
+.fa-toilet-paper::before {
+  content: "\f71e"; }
+
+.fa-toilet-paper-slash::before {
+  content: "\e072"; }
+
+.fa-toolbox::before {
+  content: "\f552"; }
+
+.fa-tooth::before {
+  content: "\f5c9"; }
+
+.fa-torii-gate::before {
+  content: "\f6a1"; }
+
+.fa-tower-broadcast::before {
+  content: "\f519"; }
+
+.fa-broadcast-tower::before {
+  content: "\f519"; }
+
+.fa-tractor::before {
+  content: "\f722"; }
+
+.fa-trademark::before {
+  content: "\f25c"; }
+
+.fa-traffic-light::before {
+  content: "\f637"; }
+
+.fa-trailer::before {
+  content: "\e041"; }
+
+.fa-train::before {
+  content: "\f238"; }
+
+.fa-train-subway::before {
+  content: "\f239"; }
+
+.fa-subway::before {
+  content: "\f239"; }
+
+.fa-train-tram::before {
+  content: "\f7da"; }
+
+.fa-tram::before {
+  content: "\f7da"; }
+
+.fa-transgender::before {
+  content: "\f225"; }
+
+.fa-transgender-alt::before {
+  content: "\f225"; }
+
+.fa-trash::before {
+  content: "\f1f8"; }
+
+.fa-trash-arrow-up::before {
+  content: "\f829"; }
+
+.fa-trash-restore::before {
+  content: "\f829"; }
+
+.fa-trash-can::before {
+  content: "\f2ed"; }
+
+.fa-trash-alt::before {
+  content: "\f2ed"; }
+
+.fa-trash-can-arrow-up::before {
+  content: "\f82a"; }
+
+.fa-trash-restore-alt::before {
+  content: "\f82a"; }
+
+.fa-tree::before {
+  content: "\f1bb"; }
+
+.fa-triangle-exclamation::before {
+  content: "\f071"; }
+
+.fa-exclamation-triangle::before {
+  content: "\f071"; }
+
+.fa-warning::before {
+  content: "\f071"; }
+
+.fa-trophy::before {
+  content: "\f091"; }
+
+.fa-truck::before {
+  content: "\f0d1"; }
+
+.fa-truck-fast::before {
+  content: "\f48b"; }
+
+.fa-shipping-fast::before {
+  content: "\f48b"; }
+
+.fa-truck-medical::before {
+  content: "\f0f9"; }
+
+.fa-ambulance::before {
+  content: "\f0f9"; }
+
+.fa-truck-monster::before {
+  content: "\f63b"; }
+
+.fa-truck-moving::before {
+  content: "\f4df"; }
+
+.fa-truck-pickup::before {
+  content: "\f63c"; }
+
+.fa-truck-ramp-box::before {
+  content: "\f4de"; }
+
+.fa-truck-loading::before {
+  content: "\f4de"; }
+
+.fa-tty::before {
+  content: "\f1e4"; }
+
+.fa-teletype::before {
+  content: "\f1e4"; }
+
+.fa-turkish-lira-sign::before {
+  content: "\e2bb"; }
+
+.fa-try::before {
+  content: "\e2bb"; }
+
+.fa-turkish-lira::before {
+  content: "\e2bb"; }
+
+.fa-turn-down::before {
+  content: "\f3be"; }
+
+.fa-level-down-alt::before {
+  content: "\f3be"; }
+
+.fa-turn-up::before {
+  content: "\f3bf"; }
+
+.fa-level-up-alt::before {
+  content: "\f3bf"; }
+
+.fa-tv::before {
+  content: "\f26c"; }
+
+.fa-television::before {
+  content: "\f26c"; }
+
+.fa-tv-alt::before {
+  content: "\f26c"; }
+
+.fa-u::before {
+  content: "\55"; }
+
+.fa-umbrella::before {
+  content: "\f0e9"; }
+
+.fa-umbrella-beach::before {
+  content: "\f5ca"; }
+
+.fa-underline::before {
+  content: "\f0cd"; }
+
+.fa-universal-access::before {
+  content: "\f29a"; }
+
+.fa-unlock::before {
+  content: "\f09c"; }
+
+.fa-unlock-keyhole::before {
+  content: "\f13e"; }
+
+.fa-unlock-alt::before {
+  content: "\f13e"; }
+
+.fa-up-down::before {
+  content: "\f338"; }
+
+.fa-arrows-alt-v::before {
+  content: "\f338"; }
+
+.fa-up-down-left-right::before {
+  content: "\f0b2"; }
+
+.fa-arrows-alt::before {
+  content: "\f0b2"; }
+
+.fa-up-long::before {
+  content: "\f30c"; }
+
+.fa-long-arrow-alt-up::before {
+  content: "\f30c"; }
+
+.fa-up-right-and-down-left-from-center::before {
+  content: "\f424"; }
+
+.fa-expand-alt::before {
+  content: "\f424"; }
+
+.fa-up-right-from-square::before {
+  content: "\f35d"; }
+
+.fa-external-link-alt::before {
+  content: "\f35d"; }
+
+.fa-upload::before {
+  content: "\f093"; }
+
+.fa-user::before {
+  content: "\f007"; }
+
+.fa-user-astronaut::before {
+  content: "\f4fb"; }
+
+.fa-user-check::before {
+  content: "\f4fc"; }
+
+.fa-user-clock::before {
+  content: "\f4fd"; }
+
+.fa-user-doctor::before {
+  content: "\f0f0"; }
+
+.fa-user-md::before {
+  content: "\f0f0"; }
+
+.fa-user-gear::before {
+  content: "\f4fe"; }
+
+.fa-user-cog::before {
+  content: "\f4fe"; }
+
+.fa-user-graduate::before {
+  content: "\f501"; }
+
+.fa-user-group::before {
+  content: "\f500"; }
+
+.fa-user-friends::before {
+  content: "\f500"; }
+
+.fa-user-injured::before {
+  content: "\f728"; }
+
+.fa-user-large::before {
+  content: "\f406"; }
+
+.fa-user-alt::before {
+  content: "\f406"; }
+
+.fa-user-large-slash::before {
+  content: "\f4fa"; }
+
+.fa-user-alt-slash::before {
+  content: "\f4fa"; }
+
+.fa-user-lock::before {
+  content: "\f502"; }
+
+.fa-user-minus::before {
+  content: "\f503"; }
+
+.fa-user-ninja::before {
+  content: "\f504"; }
+
+.fa-user-nurse::before {
+  content: "\f82f"; }
+
+.fa-user-pen::before {
+  content: "\f4ff"; }
+
+.fa-user-edit::before {
+  content: "\f4ff"; }
+
+.fa-user-plus::before {
+  content: "\f234"; }
+
+.fa-user-secret::before {
+  content: "\f21b"; }
+
+.fa-user-shield::before {
+  content: "\f505"; }
+
+.fa-user-slash::before {
+  content: "\f506"; }
+
+.fa-user-tag::before {
+  content: "\f507"; }
+
+.fa-user-tie::before {
+  content: "\f508"; }
+
+.fa-user-xmark::before {
+  content: "\f235"; }
+
+.fa-user-times::before {
+  content: "\f235"; }
+
+.fa-users::before {
+  content: "\f0c0"; }
+
+.fa-users-gear::before {
+  content: "\f509"; }
+
+.fa-users-cog::before {
+  content: "\f509"; }
+
+.fa-users-slash::before {
+  content: "\e073"; }
+
+.fa-utensils::before {
+  content: "\f2e7"; }
+
+.fa-cutlery::before {
+  content: "\f2e7"; }
+
+.fa-v::before {
+  content: "\56"; }
+
+.fa-van-shuttle::before {
+  content: "\f5b6"; }
+
+.fa-shuttle-van::before {
+  content: "\f5b6"; }
+
+.fa-vault::before {
+  content: "\e2c5"; }
+
+.fa-vector-square::before {
+  content: "\f5cb"; }
+
+.fa-venus::before {
+  content: "\f221"; }
+
+.fa-venus-double::before {
+  content: "\f226"; }
+
+.fa-venus-mars::before {
+  content: "\f228"; }
+
+.fa-vest::before {
+  content: "\e085"; }
+
+.fa-vest-patches::before {
+  content: "\e086"; }
+
+.fa-vial::before {
+  content: "\f492"; }
+
+.fa-vials::before {
+  content: "\f493"; }
+
+.fa-video::before {
+  content: "\f03d"; }
+
+.fa-video-camera::before {
+  content: "\f03d"; }
+
+.fa-video-slash::before {
+  content: "\f4e2"; }
+
+.fa-vihara::before {
+  content: "\f6a7"; }
+
+.fa-virus::before {
+  content: "\e074"; }
+
+.fa-virus-covid::before {
+  content: "\e4a8"; }
+
+.fa-virus-covid-slash::before {
+  content: "\e4a9"; }
+
+.fa-virus-slash::before {
+  content: "\e075"; }
+
+.fa-viruses::before {
+  content: "\e076"; }
+
+.fa-voicemail::before {
+  content: "\f897"; }
+
+.fa-volleyball::before {
+  content: "\f45f"; }
+
+.fa-volleyball-ball::before {
+  content: "\f45f"; }
+
+.fa-volume-high::before {
+  content: "\f028"; }
+
+.fa-volume-up::before {
+  content: "\f028"; }
+
+.fa-volume-low::before {
+  content: "\f027"; }
+
+.fa-volume-down::before {
+  content: "\f027"; }
+
+.fa-volume-off::before {
+  content: "\f026"; }
+
+.fa-volume-xmark::before {
+  content: "\f6a9"; }
+
+.fa-volume-mute::before {
+  content: "\f6a9"; }
+
+.fa-volume-times::before {
+  content: "\f6a9"; }
+
+.fa-vr-cardboard::before {
+  content: "\f729"; }
+
+.fa-w::before {
+  content: "\57"; }
+
+.fa-wallet::before {
+  content: "\f555"; }
+
+.fa-wand-magic::before {
+  content: "\f0d0"; }
+
+.fa-magic::before {
+  content: "\f0d0"; }
+
+.fa-wand-magic-sparkles::before {
+  content: "\e2ca"; }
+
+.fa-magic-wand-sparkles::before {
+  content: "\e2ca"; }
+
+.fa-wand-sparkles::before {
+  content: "\f72b"; }
+
+.fa-warehouse::before {
+  content: "\f494"; }
+
+.fa-water::before {
+  content: "\f773"; }
+
+.fa-water-ladder::before {
+  content: "\f5c5"; }
+
+.fa-ladder-water::before {
+  content: "\f5c5"; }
+
+.fa-swimming-pool::before {
+  content: "\f5c5"; }
+
+.fa-wave-square::before {
+  content: "\f83e"; }
+
+.fa-weight-hanging::before {
+  content: "\f5cd"; }
+
+.fa-weight-scale::before {
+  content: "\f496"; }
+
+.fa-weight::before {
+  content: "\f496"; }
+
+.fa-wheelchair::before {
+  content: "\f193"; }
+
+.fa-whiskey-glass::before {
+  content: "\f7a0"; }
+
+.fa-glass-whiskey::before {
+  content: "\f7a0"; }
+
+.fa-wifi::before {
+  content: "\f1eb"; }
+
+.fa-wifi-3::before {
+  content: "\f1eb"; }
+
+.fa-wifi-strong::before {
+  content: "\f1eb"; }
+
+.fa-wind::before {
+  content: "\f72e"; }
+
+.fa-window-maximize::before {
+  content: "\f2d0"; }
+
+.fa-window-minimize::before {
+  content: "\f2d1"; }
+
+.fa-window-restore::before {
+  content: "\f2d2"; }
+
+.fa-wine-bottle::before {
+  content: "\f72f"; }
+
+.fa-wine-glass::before {
+  content: "\f4e3"; }
+
+.fa-wine-glass-empty::before {
+  content: "\f5ce"; }
+
+.fa-wine-glass-alt::before {
+  content: "\f5ce"; }
+
+.fa-won-sign::before {
+  content: "\f159"; }
+
+.fa-krw::before {
+  content: "\f159"; }
+
+.fa-won::before {
+  content: "\f159"; }
+
+.fa-wrench::before {
+  content: "\f0ad"; }
+
+.fa-x::before {
+  content: "\58"; }
+
+.fa-x-ray::before {
+  content: "\f497"; }
+
+.fa-xmark::before {
+  content: "\f00d"; }
+
+.fa-close::before {
+  content: "\f00d"; }
+
+.fa-multiply::before {
+  content: "\f00d"; }
+
+.fa-remove::before {
+  content: "\f00d"; }
+
+.fa-times::before {
+  content: "\f00d"; }
+
+.fa-y::before {
+  content: "\59"; }
+
+.fa-yen-sign::before {
+  content: "\f157"; }
+
+.fa-cny::before {
+  content: "\f157"; }
+
+.fa-jpy::before {
+  content: "\f157"; }
+
+.fa-rmb::before {
+  content: "\f157"; }
+
+.fa-yen::before {
+  content: "\f157"; }
+
+.fa-yin-yang::before {
+  content: "\f6ad"; }
+
+.fa-z::before {
+  content: "\5a"; }
+
+.sr-only,
+.fa-sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border-width: 0; }
+
+.sr-only-focusable:not(:focus),
+.fa-sr-only-focusable:not(:focus) {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border-width: 0; }
+:root, :host {
+  --fa-font-brands: normal 400 1em/1 "Font Awesome 6 Brands"; }
+
+@font-face {
+  font-family: 'Font Awesome 6 Brands';
+  font-style: normal;
+  font-weight: 400;
+  font-display: block;
+  src: url("../webfonts/fa-brands-400.woff2") format("woff2"), url("../webfonts/fa-brands-400.ttf") format("truetype"); }
+
+.fab,
+.fa-brands {
+  font-family: 'Font Awesome 6 Brands';
+  font-weight: 400; }
+
+.fa-42-group:before {
+  content: "\e080"; }
+
+.fa-innosoft:before {
+  content: "\e080"; }
+
+.fa-500px:before {
+  content: "\f26e"; }
+
+.fa-accessible-icon:before {
+  content: "\f368"; }
+
+.fa-accusoft:before {
+  content: "\f369"; }
+
+.fa-adn:before {
+  content: "\f170"; }
+
+.fa-adversal:before {
+  content: "\f36a"; }
+
+.fa-affiliatetheme:before {
+  content: "\f36b"; }
+
+.fa-airbnb:before {
+  content: "\f834"; }
+
+.fa-algolia:before {
+  content: "\f36c"; }
+
+.fa-alipay:before {
+  content: "\f642"; }
+
+.fa-amazon:before {
+  content: "\f270"; }
+
+.fa-amazon-pay:before {
+  content: "\f42c"; }
+
+.fa-amilia:before {
+  content: "\f36d"; }
+
+.fa-android:before {
+  content: "\f17b"; }
+
+.fa-angellist:before {
+  content: "\f209"; }
+
+.fa-angrycreative:before {
+  content: "\f36e"; }
+
+.fa-angular:before {
+  content: "\f420"; }
+
+.fa-app-store:before {
+  content: "\f36f"; }
+
+.fa-app-store-ios:before {
+  content: "\f370"; }
+
+.fa-apper:before {
+  content: "\f371"; }
+
+.fa-apple:before {
+  content: "\f179"; }
+
+.fa-apple-pay:before {
+  content: "\f415"; }
+
+.fa-artstation:before {
+  content: "\f77a"; }
+
+.fa-asymmetrik:before {
+  content: "\f372"; }
+
+.fa-atlassian:before {
+  content: "\f77b"; }
+
+.fa-audible:before {
+  content: "\f373"; }
+
+.fa-autoprefixer:before {
+  content: "\f41c"; }
+
+.fa-avianex:before {
+  content: "\f374"; }
+
+.fa-aviato:before {
+  content: "\f421"; }
+
+.fa-aws:before {
+  content: "\f375"; }
+
+.fa-bandcamp:before {
+  content: "\f2d5"; }
+
+.fa-battle-net:before {
+  content: "\f835"; }
+
+.fa-behance:before {
+  content: "\f1b4"; }
+
+.fa-behance-square:before {
+  content: "\f1b5"; }
+
+.fa-bilibili:before {
+  content: "\e3d9"; }
+
+.fa-bimobject:before {
+  content: "\f378"; }
+
+.fa-bitbucket:before {
+  content: "\f171"; }
+
+.fa-bitcoin:before {
+  content: "\f379"; }
+
+.fa-bity:before {
+  content: "\f37a"; }
+
+.fa-black-tie:before {
+  content: "\f27e"; }
+
+.fa-blackberry:before {
+  content: "\f37b"; }
+
+.fa-blogger:before {
+  content: "\f37c"; }
+
+.fa-blogger-b:before {
+  content: "\f37d"; }
+
+.fa-bluetooth:before {
+  content: "\f293"; }
+
+.fa-bluetooth-b:before {
+  content: "\f294"; }
+
+.fa-bootstrap:before {
+  content: "\f836"; }
+
+.fa-bots:before {
+  content: "\e340"; }
+
+.fa-btc:before {
+  content: "\f15a"; }
+
+.fa-buffer:before {
+  content: "\f837"; }
+
+.fa-buromobelexperte:before {
+  content: "\f37f"; }
+
+.fa-buy-n-large:before {
+  content: "\f8a6"; }
+
+.fa-buysellads:before {
+  content: "\f20d"; }
+
+.fa-canadian-maple-leaf:before {
+  content: "\f785"; }
+
+.fa-cc-amazon-pay:before {
+  content: "\f42d"; }
+
+.fa-cc-amex:before {
+  content: "\f1f3"; }
+
+.fa-cc-apple-pay:before {
+  content: "\f416"; }
+
+.fa-cc-diners-club:before {
+  content: "\f24c"; }
+
+.fa-cc-discover:before {
+  content: "\f1f2"; }
+
+.fa-cc-jcb:before {
+  content: "\f24b"; }
+
+.fa-cc-mastercard:before {
+  content: "\f1f1"; }
+
+.fa-cc-paypal:before {
+  content: "\f1f4"; }
+
+.fa-cc-stripe:before {
+  content: "\f1f5"; }
+
+.fa-cc-visa:before {
+  content: "\f1f0"; }
+
+.fa-centercode:before {
+  content: "\f380"; }
+
+.fa-centos:before {
+  content: "\f789"; }
+
+.fa-chrome:before {
+  content: "\f268"; }
+
+.fa-chromecast:before {
+  content: "\f838"; }
+
+.fa-cloudflare:before {
+  content: "\e07d"; }
+
+.fa-cloudscale:before {
+  content: "\f383"; }
+
+.fa-cloudsmith:before {
+  content: "\f384"; }
+
+.fa-cloudversify:before {
+  content: "\f385"; }
+
+.fa-cmplid:before {
+  content: "\e360"; }
+
+.fa-codepen:before {
+  content: "\f1cb"; }
+
+.fa-codiepie:before {
+  content: "\f284"; }
+
+.fa-confluence:before {
+  content: "\f78d"; }
+
+.fa-connectdevelop:before {
+  content: "\f20e"; }
+
+.fa-contao:before {
+  content: "\f26d"; }
+
+.fa-cotton-bureau:before {
+  content: "\f89e"; }
+
+.fa-cpanel:before {
+  content: "\f388"; }
+
+.fa-creative-commons:before {
+  content: "\f25e"; }
+
+.fa-creative-commons-by:before {
+  content: "\f4e7"; }
+
+.fa-creative-commons-nc:before {
+  content: "\f4e8"; }
+
+.fa-creative-commons-nc-eu:before {
+  content: "\f4e9"; }
+
+.fa-creative-commons-nc-jp:before {
+  content: "\f4ea"; }
+
+.fa-creative-commons-nd:before {
+  content: "\f4eb"; }
+
+.fa-creative-commons-pd:before {
+  content: "\f4ec"; }
+
+.fa-creative-commons-pd-alt:before {
+  content: "\f4ed"; }
+
+.fa-creative-commons-remix:before {
+  content: "\f4ee"; }
+
+.fa-creative-commons-sa:before {
+  content: "\f4ef"; }
+
+.fa-creative-commons-sampling:before {
+  content: "\f4f0"; }
+
+.fa-creative-commons-sampling-plus:before {
+  content: "\f4f1"; }
+
+.fa-creative-commons-share:before {
+  content: "\f4f2"; }
+
+.fa-creative-commons-zero:before {
+  content: "\f4f3"; }
+
+.fa-critical-role:before {
+  content: "\f6c9"; }
+
+.fa-css3:before {
+  content: "\f13c"; }
+
+.fa-css3-alt:before {
+  content: "\f38b"; }
+
+.fa-cuttlefish:before {
+  content: "\f38c"; }
+
+.fa-d-and-d:before {
+  content: "\f38d"; }
+
+.fa-d-and-d-beyond:before {
+  content: "\f6ca"; }
+
+.fa-dailymotion:before {
+  content: "\e052"; }
+
+.fa-dashcube:before {
+  content: "\f210"; }
+
+.fa-deezer:before {
+  content: "\e077"; }
+
+.fa-delicious:before {
+  content: "\f1a5"; }
+
+.fa-deploydog:before {
+  content: "\f38e"; }
+
+.fa-deskpro:before {
+  content: "\f38f"; }
+
+.fa-dev:before {
+  content: "\f6cc"; }
+
+.fa-deviantart:before {
+  content: "\f1bd"; }
+
+.fa-dhl:before {
+  content: "\f790"; }
+
+.fa-diaspora:before {
+  content: "\f791"; }
+
+.fa-digg:before {
+  content: "\f1a6"; }
+
+.fa-digital-ocean:before {
+  content: "\f391"; }
+
+.fa-discord:before {
+  content: "\f392"; }
+
+.fa-discourse:before {
+  content: "\f393"; }
+
+.fa-dochub:before {
+  content: "\f394"; }
+
+.fa-docker:before {
+  content: "\f395"; }
+
+.fa-draft2digital:before {
+  content: "\f396"; }
+
+.fa-dribbble:before {
+  content: "\f17d"; }
+
+.fa-dribbble-square:before {
+  content: "\f397"; }
+
+.fa-dropbox:before {
+  content: "\f16b"; }
+
+.fa-drupal:before {
+  content: "\f1a9"; }
+
+.fa-dyalog:before {
+  content: "\f399"; }
+
+.fa-earlybirds:before {
+  content: "\f39a"; }
+
+.fa-ebay:before {
+  content: "\f4f4"; }
+
+.fa-edge:before {
+  content: "\f282"; }
+
+.fa-edge-legacy:before {
+  content: "\e078"; }
+
+.fa-elementor:before {
+  content: "\f430"; }
+
+.fa-ello:before {
+  content: "\f5f1"; }
+
+.fa-ember:before {
+  content: "\f423"; }
+
+.fa-empire:before {
+  content: "\f1d1"; }
+
+.fa-envira:before {
+  content: "\f299"; }
+
+.fa-erlang:before {
+  content: "\f39d"; }
+
+.fa-ethereum:before {
+  content: "\f42e"; }
+
+.fa-etsy:before {
+  content: "\f2d7"; }
+
+.fa-evernote:before {
+  content: "\f839"; }
+
+.fa-expeditedssl:before {
+  content: "\f23e"; }
+
+.fa-facebook:before {
+  content: "\f09a"; }
+
+.fa-facebook-f:before {
+  content: "\f39e"; }
+
+.fa-facebook-messenger:before {
+  content: "\f39f"; }
+
+.fa-facebook-square:before {
+  content: "\f082"; }
+
+.fa-fantasy-flight-games:before {
+  content: "\f6dc"; }
+
+.fa-fedex:before {
+  content: "\f797"; }
+
+.fa-fedora:before {
+  content: "\f798"; }
+
+.fa-figma:before {
+  content: "\f799"; }
+
+.fa-firefox:before {
+  content: "\f269"; }
+
+.fa-firefox-browser:before {
+  content: "\e007"; }
+
+.fa-first-order:before {
+  content: "\f2b0"; }
+
+.fa-first-order-alt:before {
+  content: "\f50a"; }
+
+.fa-firstdraft:before {
+  content: "\f3a1"; }
+
+.fa-flickr:before {
+  content: "\f16e"; }
+
+.fa-flipboard:before {
+  content: "\f44d"; }
+
+.fa-fly:before {
+  content: "\f417"; }
+
+.fa-font-awesome:before {
+  content: "\f2b4"; }
+
+.fa-font-awesome-flag:before {
+  content: "\f2b4"; }
+
+.fa-font-awesome-logo-full:before {
+  content: "\f2b4"; }
+
+.fa-fonticons:before {
+  content: "\f280"; }
+
+.fa-fonticons-fi:before {
+  content: "\f3a2"; }
+
+.fa-fort-awesome:before {
+  content: "\f286"; }
+
+.fa-fort-awesome-alt:before {
+  content: "\f3a3"; }
+
+.fa-forumbee:before {
+  content: "\f211"; }
+
+.fa-foursquare:before {
+  content: "\f180"; }
+
+.fa-free-code-camp:before {
+  content: "\f2c5"; }
+
+.fa-freebsd:before {
+  content: "\f3a4"; }
+
+.fa-fulcrum:before {
+  content: "\f50b"; }
+
+.fa-galactic-republic:before {
+  content: "\f50c"; }
+
+.fa-galactic-senate:before {
+  content: "\f50d"; }
+
+.fa-get-pocket:before {
+  content: "\f265"; }
+
+.fa-gg:before {
+  content: "\f260"; }
+
+.fa-gg-circle:before {
+  content: "\f261"; }
+
+.fa-git:before {
+  content: "\f1d3"; }
+
+.fa-git-alt:before {
+  content: "\f841"; }
+
+.fa-git-square:before {
+  content: "\f1d2"; }
+
+.fa-github:before {
+  content: "\f09b"; }
+
+.fa-github-alt:before {
+  content: "\f113"; }
+
+.fa-github-square:before {
+  content: "\f092"; }
+
+.fa-gitkraken:before {
+  content: "\f3a6"; }
+
+.fa-gitlab:before {
+  content: "\f296"; }
+
+.fa-gitter:before {
+  content: "\f426"; }
+
+.fa-glide:before {
+  content: "\f2a5"; }
+
+.fa-glide-g:before {
+  content: "\f2a6"; }
+
+.fa-gofore:before {
+  content: "\f3a7"; }
+
+.fa-golang:before {
+  content: "\e40f"; }
+
+.fa-goodreads:before {
+  content: "\f3a8"; }
+
+.fa-goodreads-g:before {
+  content: "\f3a9"; }
+
+.fa-google:before {
+  content: "\f1a0"; }
+
+.fa-google-drive:before {
+  content: "\f3aa"; }
+
+.fa-google-pay:before {
+  content: "\e079"; }
+
+.fa-google-play:before {
+  content: "\f3ab"; }
+
+.fa-google-plus:before {
+  content: "\f2b3"; }
+
+.fa-google-plus-g:before {
+  content: "\f0d5"; }
+
+.fa-google-plus-square:before {
+  content: "\f0d4"; }
+
+.fa-google-wallet:before {
+  content: "\f1ee"; }
+
+.fa-gratipay:before {
+  content: "\f184"; }
+
+.fa-grav:before {
+  content: "\f2d6"; }
+
+.fa-gripfire:before {
+  content: "\f3ac"; }
+
+.fa-grunt:before {
+  content: "\f3ad"; }
+
+.fa-guilded:before {
+  content: "\e07e"; }
+
+.fa-gulp:before {
+  content: "\f3ae"; }
+
+.fa-hacker-news:before {
+  content: "\f1d4"; }
+
+.fa-hacker-news-square:before {
+  content: "\f3af"; }
+
+.fa-hackerrank:before {
+  content: "\f5f7"; }
+
+.fa-hashnode:before {
+  content: "\e499"; }
+
+.fa-hips:before {
+  content: "\f452"; }
+
+.fa-hire-a-helper:before {
+  content: "\f3b0"; }
+
+.fa-hive:before {
+  content: "\e07f"; }
+
+.fa-hooli:before {
+  content: "\f427"; }
+
+.fa-hornbill:before {
+  content: "\f592"; }
+
+.fa-hotjar:before {
+  content: "\f3b1"; }
+
+.fa-houzz:before {
+  content: "\f27c"; }
+
+.fa-html5:before {
+  content: "\f13b"; }
+
+.fa-hubspot:before {
+  content: "\f3b2"; }
+
+.fa-ideal:before {
+  content: "\e013"; }
+
+.fa-imdb:before {
+  content: "\f2d8"; }
+
+.fa-instagram:before {
+  content: "\f16d"; }
+
+.fa-instagram-square:before {
+  content: "\e055"; }
+
+.fa-instalod:before {
+  content: "\e081"; }
+
+.fa-intercom:before {
+  content: "\f7af"; }
+
+.fa-internet-explorer:before {
+  content: "\f26b"; }
+
+.fa-invision:before {
+  content: "\f7b0"; }
+
+.fa-ioxhost:before {
+  content: "\f208"; }
+
+.fa-itch-io:before {
+  content: "\f83a"; }
+
+.fa-itunes:before {
+  content: "\f3b4"; }
+
+.fa-itunes-note:before {
+  content: "\f3b5"; }
+
+.fa-java:before {
+  content: "\f4e4"; }
+
+.fa-jedi-order:before {
+  content: "\f50e"; }
+
+.fa-jenkins:before {
+  content: "\f3b6"; }
+
+.fa-jira:before {
+  content: "\f7b1"; }
+
+.fa-joget:before {
+  content: "\f3b7"; }
+
+.fa-joomla:before {
+  content: "\f1aa"; }
+
+.fa-js:before {
+  content: "\f3b8"; }
+
+.fa-js-square:before {
+  content: "\f3b9"; }
+
+.fa-jsfiddle:before {
+  content: "\f1cc"; }
+
+.fa-kaggle:before {
+  content: "\f5fa"; }
+
+.fa-keybase:before {
+  content: "\f4f5"; }
+
+.fa-keycdn:before {
+  content: "\f3ba"; }
+
+.fa-kickstarter:before {
+  content: "\f3bb"; }
+
+.fa-kickstarter-k:before {
+  content: "\f3bc"; }
+
+.fa-korvue:before {
+  content: "\f42f"; }
+
+.fa-laravel:before {
+  content: "\f3bd"; }
+
+.fa-lastfm:before {
+  content: "\f202"; }
+
+.fa-lastfm-square:before {
+  content: "\f203"; }
+
+.fa-leanpub:before {
+  content: "\f212"; }
+
+.fa-less:before {
+  content: "\f41d"; }
+
+.fa-line:before {
+  content: "\f3c0"; }
+
+.fa-linkedin:before {
+  content: "\f08c"; }
+
+.fa-linkedin-in:before {
+  content: "\f0e1"; }
+
+.fa-linode:before {
+  content: "\f2b8"; }
+
+.fa-linux:before {
+  content: "\f17c"; }
+
+.fa-lyft:before {
+  content: "\f3c3"; }
+
+.fa-magento:before {
+  content: "\f3c4"; }
+
+.fa-mailchimp:before {
+  content: "\f59e"; }
+
+.fa-mandalorian:before {
+  content: "\f50f"; }
+
+.fa-markdown:before {
+  content: "\f60f"; }
+
+.fa-mastodon:before {
+  content: "\f4f6"; }
+
+.fa-maxcdn:before {
+  content: "\f136"; }
+
+.fa-mdb:before {
+  content: "\f8ca"; }
+
+.fa-medapps:before {
+  content: "\f3c6"; }
+
+.fa-medium:before {
+  content: "\f23a"; }
+
+.fa-medium-m:before {
+  content: "\f23a"; }
+
+.fa-medrt:before {
+  content: "\f3c8"; }
+
+.fa-meetup:before {
+  content: "\f2e0"; }
+
+.fa-megaport:before {
+  content: "\f5a3"; }
+
+.fa-mendeley:before {
+  content: "\f7b3"; }
+
+.fa-microblog:before {
+  content: "\e01a"; }
+
+.fa-microsoft:before {
+  content: "\f3ca"; }
+
+.fa-mix:before {
+  content: "\f3cb"; }
+
+.fa-mixcloud:before {
+  content: "\f289"; }
+
+.fa-mixer:before {
+  content: "\e056"; }
+
+.fa-mizuni:before {
+  content: "\f3cc"; }
+
+.fa-modx:before {
+  content: "\f285"; }
+
+.fa-monero:before {
+  content: "\f3d0"; }
+
+.fa-napster:before {
+  content: "\f3d2"; }
+
+.fa-neos:before {
+  content: "\f612"; }
+
+.fa-nimblr:before {
+  content: "\f5a8"; }
+
+.fa-node:before {
+  content: "\f419"; }
+
+.fa-node-js:before {
+  content: "\f3d3"; }
+
+.fa-npm:before {
+  content: "\f3d4"; }
+
+.fa-ns8:before {
+  content: "\f3d5"; }
+
+.fa-nutritionix:before {
+  content: "\f3d6"; }
+
+.fa-octopus-deploy:before {
+  content: "\e082"; }
+
+.fa-odnoklassniki:before {
+  content: "\f263"; }
+
+.fa-odnoklassniki-square:before {
+  content: "\f264"; }
+
+.fa-old-republic:before {
+  content: "\f510"; }
+
+.fa-opencart:before {
+  content: "\f23d"; }
+
+.fa-openid:before {
+  content: "\f19b"; }
+
+.fa-opera:before {
+  content: "\f26a"; }
+
+.fa-optin-monster:before {
+  content: "\f23c"; }
+
+.fa-orcid:before {
+  content: "\f8d2"; }
+
+.fa-osi:before {
+  content: "\f41a"; }
+
+.fa-padlet:before {
+  content: "\e4a0"; }
+
+.fa-page4:before {
+  content: "\f3d7"; }
+
+.fa-pagelines:before {
+  content: "\f18c"; }
+
+.fa-palfed:before {
+  content: "\f3d8"; }
+
+.fa-patreon:before {
+  content: "\f3d9"; }
+
+.fa-paypal:before {
+  content: "\f1ed"; }
+
+.fa-perbyte:before {
+  content: "\e083"; }
+
+.fa-periscope:before {
+  content: "\f3da"; }
+
+.fa-phabricator:before {
+  content: "\f3db"; }
+
+.fa-phoenix-framework:before {
+  content: "\f3dc"; }
+
+.fa-phoenix-squadron:before {
+  content: "\f511"; }
+
+.fa-php:before {
+  content: "\f457"; }
+
+.fa-pied-piper:before {
+  content: "\f2ae"; }
+
+.fa-pied-piper-alt:before {
+  content: "\f1a8"; }
+
+.fa-pied-piper-hat:before {
+  content: "\f4e5"; }
+
+.fa-pied-piper-pp:before {
+  content: "\f1a7"; }
+
+.fa-pied-piper-square:before {
+  content: "\e01e"; }
+
+.fa-pinterest:before {
+  content: "\f0d2"; }
+
+.fa-pinterest-p:before {
+  content: "\f231"; }
+
+.fa-pinterest-square:before {
+  content: "\f0d3"; }
+
+.fa-pix:before {
+  content: "\e43a"; }
+
+.fa-playstation:before {
+  content: "\f3df"; }
+
+.fa-product-hunt:before {
+  content: "\f288"; }
+
+.fa-pushed:before {
+  content: "\f3e1"; }
+
+.fa-python:before {
+  content: "\f3e2"; }
+
+.fa-qq:before {
+  content: "\f1d6"; }
+
+.fa-quinscape:before {
+  content: "\f459"; }
+
+.fa-quora:before {
+  content: "\f2c4"; }
+
+.fa-r-project:before {
+  content: "\f4f7"; }
+
+.fa-raspberry-pi:before {
+  content: "\f7bb"; }
+
+.fa-ravelry:before {
+  content: "\f2d9"; }
+
+.fa-react:before {
+  content: "\f41b"; }
+
+.fa-reacteurope:before {
+  content: "\f75d"; }
+
+.fa-readme:before {
+  content: "\f4d5"; }
+
+.fa-rebel:before {
+  content: "\f1d0"; }
+
+.fa-red-river:before {
+  content: "\f3e3"; }
+
+.fa-reddit:before {
+  content: "\f1a1"; }
+
+.fa-reddit-alien:before {
+  content: "\f281"; }
+
+.fa-reddit-square:before {
+  content: "\f1a2"; }
+
+.fa-redhat:before {
+  content: "\f7bc"; }
+
+.fa-renren:before {
+  content: "\f18b"; }
+
+.fa-replyd:before {
+  content: "\f3e6"; }
+
+.fa-researchgate:before {
+  content: "\f4f8"; }
+
+.fa-resolving:before {
+  content: "\f3e7"; }
+
+.fa-rev:before {
+  content: "\f5b2"; }
+
+.fa-rocketchat:before {
+  content: "\f3e8"; }
+
+.fa-rockrms:before {
+  content: "\f3e9"; }
+
+.fa-rust:before {
+  content: "\e07a"; }
+
+.fa-safari:before {
+  content: "\f267"; }
+
+.fa-salesforce:before {
+  content: "\f83b"; }
+
+.fa-sass:before {
+  content: "\f41e"; }
+
+.fa-schlix:before {
+  content: "\f3ea"; }
+
+.fa-scribd:before {
+  content: "\f28a"; }
+
+.fa-searchengin:before {
+  content: "\f3eb"; }
+
+.fa-sellcast:before {
+  content: "\f2da"; }
+
+.fa-sellsy:before {
+  content: "\f213"; }
+
+.fa-servicestack:before {
+  content: "\f3ec"; }
+
+.fa-shirtsinbulk:before {
+  content: "\f214"; }
+
+.fa-shopify:before {
+  content: "\e057"; }
+
+.fa-shopware:before {
+  content: "\f5b5"; }
+
+.fa-simplybuilt:before {
+  content: "\f215"; }
+
+.fa-sistrix:before {
+  content: "\f3ee"; }
+
+.fa-sith:before {
+  content: "\f512"; }
+
+.fa-sitrox:before {
+  content: "\e44a"; }
+
+.fa-sketch:before {
+  content: "\f7c6"; }
+
+.fa-skyatlas:before {
+  content: "\f216"; }
+
+.fa-skype:before {
+  content: "\f17e"; }
+
+.fa-slack:before {
+  content: "\f198"; }
+
+.fa-slack-hash:before {
+  content: "\f198"; }
+
+.fa-slideshare:before {
+  content: "\f1e7"; }
+
+.fa-snapchat:before {
+  content: "\f2ab"; }
+
+.fa-snapchat-ghost:before {
+  content: "\f2ab"; }
+
+.fa-snapchat-square:before {
+  content: "\f2ad"; }
+
+.fa-soundcloud:before {
+  content: "\f1be"; }
+
+.fa-sourcetree:before {
+  content: "\f7d3"; }
+
+.fa-speakap:before {
+  content: "\f3f3"; }
+
+.fa-speaker-deck:before {
+  content: "\f83c"; }
+
+.fa-spotify:before {
+  content: "\f1bc"; }
+
+.fa-square-font-awesome:before {
+  content: "\f425"; }
+
+.fa-square-font-awesome-stroke:before {
+  content: "\f35c"; }
+
+.fa-font-awesome-alt:before {
+  content: "\f35c"; }
+
+.fa-squarespace:before {
+  content: "\f5be"; }
+
+.fa-stack-exchange:before {
+  content: "\f18d"; }
+
+.fa-stack-overflow:before {
+  content: "\f16c"; }
+
+.fa-stackpath:before {
+  content: "\f842"; }
+
+.fa-staylinked:before {
+  content: "\f3f5"; }
+
+.fa-steam:before {
+  content: "\f1b6"; }
+
+.fa-steam-square:before {
+  content: "\f1b7"; }
+
+.fa-steam-symbol:before {
+  content: "\f3f6"; }
+
+.fa-sticker-mule:before {
+  content: "\f3f7"; }
+
+.fa-strava:before {
+  content: "\f428"; }
+
+.fa-stripe:before {
+  content: "\f429"; }
+
+.fa-stripe-s:before {
+  content: "\f42a"; }
+
+.fa-studiovinari:before {
+  content: "\f3f8"; }
+
+.fa-stumbleupon:before {
+  content: "\f1a4"; }
+
+.fa-stumbleupon-circle:before {
+  content: "\f1a3"; }
+
+.fa-superpowers:before {
+  content: "\f2dd"; }
+
+.fa-supple:before {
+  content: "\f3f9"; }
+
+.fa-suse:before {
+  content: "\f7d6"; }
+
+.fa-swift:before {
+  content: "\f8e1"; }
+
+.fa-symfony:before {
+  content: "\f83d"; }
+
+.fa-teamspeak:before {
+  content: "\f4f9"; }
+
+.fa-telegram:before {
+  content: "\f2c6"; }
+
+.fa-telegram-plane:before {
+  content: "\f2c6"; }
+
+.fa-tencent-weibo:before {
+  content: "\f1d5"; }
+
+.fa-the-red-yeti:before {
+  content: "\f69d"; }
+
+.fa-themeco:before {
+  content: "\f5c6"; }
+
+.fa-themeisle:before {
+  content: "\f2b2"; }
+
+.fa-think-peaks:before {
+  content: "\f731"; }
+
+.fa-tiktok:before {
+  content: "\e07b"; }
+
+.fa-trade-federation:before {
+  content: "\f513"; }
+
+.fa-trello:before {
+  content: "\f181"; }
+
+.fa-tumblr:before {
+  content: "\f173"; }
+
+.fa-tumblr-square:before {
+  content: "\f174"; }
+
+.fa-twitch:before {
+  content: "\f1e8"; }
+
+.fa-twitter:before {
+  content: "\f099"; }
+
+.fa-twitter-square:before {
+  content: "\f081"; }
+
+.fa-typo3:before {
+  content: "\f42b"; }
+
+.fa-uber:before {
+  content: "\f402"; }
+
+.fa-ubuntu:before {
+  content: "\f7df"; }
+
+.fa-uikit:before {
+  content: "\f403"; }
+
+.fa-umbraco:before {
+  content: "\f8e8"; }
+
+.fa-uncharted:before {
+  content: "\e084"; }
+
+.fa-uniregistry:before {
+  content: "\f404"; }
+
+.fa-unity:before {
+  content: "\e049"; }
+
+.fa-unsplash:before {
+  content: "\e07c"; }
+
+.fa-untappd:before {
+  content: "\f405"; }
+
+.fa-ups:before {
+  content: "\f7e0"; }
+
+.fa-usb:before {
+  content: "\f287"; }
+
+.fa-usps:before {
+  content: "\f7e1"; }
+
+.fa-ussunnah:before {
+  content: "\f407"; }
+
+.fa-vaadin:before {
+  content: "\f408"; }
+
+.fa-viacoin:before {
+  content: "\f237"; }
+
+.fa-viadeo:before {
+  content: "\f2a9"; }
+
+.fa-viadeo-square:before {
+  content: "\f2aa"; }
+
+.fa-viber:before {
+  content: "\f409"; }
+
+.fa-vimeo:before {
+  content: "\f40a"; }
+
+.fa-vimeo-square:before {
+  content: "\f194"; }
+
+.fa-vimeo-v:before {
+  content: "\f27d"; }
+
+.fa-vine:before {
+  content: "\f1ca"; }
+
+.fa-vk:before {
+  content: "\f189"; }
+
+.fa-vnv:before {
+  content: "\f40b"; }
+
+.fa-vuejs:before {
+  content: "\f41f"; }
+
+.fa-watchman-monitoring:before {
+  content: "\e087"; }
+
+.fa-waze:before {
+  content: "\f83f"; }
+
+.fa-weebly:before {
+  content: "\f5cc"; }
+
+.fa-weibo:before {
+  content: "\f18a"; }
+
+.fa-weixin:before {
+  content: "\f1d7"; }
+
+.fa-whatsapp:before {
+  content: "\f232"; }
+
+.fa-whatsapp-square:before {
+  content: "\f40c"; }
+
+.fa-whmcs:before {
+  content: "\f40d"; }
+
+.fa-wikipedia-w:before {
+  content: "\f266"; }
+
+.fa-windows:before {
+  content: "\f17a"; }
+
+.fa-wirsindhandwerk:before {
+  content: "\e2d0"; }
+
+.fa-wsh:before {
+  content: "\e2d0"; }
+
+.fa-wix:before {
+  content: "\f5cf"; }
+
+.fa-wizards-of-the-coast:before {
+  content: "\f730"; }
+
+.fa-wodu:before {
+  content: "\e088"; }
+
+.fa-wolf-pack-battalion:before {
+  content: "\f514"; }
+
+.fa-wordpress:before {
+  content: "\f19a"; }
+
+.fa-wordpress-simple:before {
+  content: "\f411"; }
+
+.fa-wpbeginner:before {
+  content: "\f297"; }
+
+.fa-wpexplorer:before {
+  content: "\f2de"; }
+
+.fa-wpforms:before {
+  content: "\f298"; }
+
+.fa-wpressr:before {
+  content: "\f3e4"; }
+
+.fa-xbox:before {
+  content: "\f412"; }
+
+.fa-xing:before {
+  content: "\f168"; }
+
+.fa-xing-square:before {
+  content: "\f169"; }
+
+.fa-y-combinator:before {
+  content: "\f23b"; }
+
+.fa-yahoo:before {
+  content: "\f19e"; }
+
+.fa-yammer:before {
+  content: "\f840"; }
+
+.fa-yandex:before {
+  content: "\f413"; }
+
+.fa-yandex-international:before {
+  content: "\f414"; }
+
+.fa-yarn:before {
+  content: "\f7e3"; }
+
+.fa-yelp:before {
+  content: "\f1e9"; }
+
+.fa-yoast:before {
+  content: "\f2b1"; }
+
+.fa-youtube:before {
+  content: "\f167"; }
+
+.fa-youtube-square:before {
+  content: "\f431"; }
+
+.fa-zhihu:before {
+  content: "\f63f"; }
+:root, :host {
+  --fa-font-regular: normal 400 1em/1 "Font Awesome 6 Free"; }
+
+@font-face {
+  font-family: 'Font Awesome 6 Free';
+  font-style: normal;
+  font-weight: 400;
+  font-display: block;
+  src: url("../webfonts/fa-regular-400.woff2") format("woff2"), url("../webfonts/fa-regular-400.ttf") format("truetype"); }
+
+.far,
+.fa-regular {
+  font-family: 'Font Awesome 6 Free';
+  font-weight: 400; }
+:root, :host {
+  --fa-font-solid: normal 900 1em/1 "Font Awesome 6 Free"; }
+
+@font-face {
+  font-family: 'Font Awesome 6 Free';
+  font-style: normal;
+  font-weight: 900;
+  font-display: block;
+  src: url("../webfonts/fa-solid-900.woff2") format("woff2"), url("../webfonts/fa-solid-900.ttf") format("truetype"); }
+
+.fas,
+.fa-solid {
+  font-family: 'Font Awesome 6 Free';
+  font-weight: 900; }
+@font-face {
+  font-family: "Font Awesome 5 Brands";
+  font-display: block;
+  font-weight: 400;
+  src: url("../webfonts/fa-brands-400.woff2") format("woff2"), url("../webfonts/fa-brands-400.ttf") format("truetype"); }
+
+@font-face {
+  font-family: "Font Awesome 5 Free";
+  font-display: block;
+  font-weight: 900;
+  src: url("../webfonts/fa-solid-900.woff2") format("woff2"), url("../webfonts/fa-solid-900.ttf") format("truetype"); }
+
+@font-face {
+  font-family: "Font Awesome 5 Free";
+  font-display: block;
+  font-weight: 400;
+  src: url("../webfonts/fa-regular-400.woff2") format("woff2"), url("../webfonts/fa-regular-400.ttf") format("truetype"); }
+@font-face {
+  font-family: "FontAwesome";
+  font-display: block;
+  src: url("../webfonts/fa-solid-900.woff2") format("woff2"), url("../webfonts/fa-solid-900.ttf") format("truetype"); }
+
+@font-face {
+  font-family: "FontAwesome";
+  font-display: block;
+  src: url("../webfonts/fa-brands-400.woff2") format("woff2"), url("../webfonts/fa-brands-400.ttf") format("truetype"); }
+
+@font-face {
+  font-family: "FontAwesome";
+  font-display: block;
+  src: url("../webfonts/fa-regular-400.woff2") format("woff2"), url("../webfonts/fa-regular-400.ttf") format("truetype");
+  unicode-range: U+F003,U+F006,U+F014,U+F016-F017,U+F01A-F01B,U+F01D,U+F022,U+F03E,U+F044,U+F046,U+F05C-F05D,U+F06E,U+F070,U+F087-F088,U+F08A,U+F094,U+F096-F097,U+F09D,U+F0A0,U+F0A2,U+F0A4-F0A7,U+F0C5,U+F0C7,U+F0E5-F0E6,U+F0EB,U+F0F6-F0F8,U+F10C,U+F114-F115,U+F118-F11A,U+F11C-F11D,U+F133,U+F147,U+F14E,U+F150-F152,U+F185-F186,U+F18E,U+F190-F192,U+F196,U+F1C1-F1C9,U+F1D9,U+F1DB,U+F1E3,U+F1EA,U+F1F7,U+F1F9,U+F20A,U+F247-F248,U+F24A,U+F24D,U+F255-F25B,U+F25D,U+F271-F274,U+F278,U+F27B,U+F28C,U+F28E,U+F29C,U+F2B5,U+F2B7,U+F2BA,U+F2BC,U+F2BE,U+F2C0-F2C1,U+F2C3,U+F2D0,U+F2D2,U+F2D4,U+F2DC; }
+
+@font-face {
+  font-family: "FontAwesome";
+  font-display: block;
+  src: url("../webfonts/fa-v4compatibility.woff2") format("woff2"), url("../webfonts/fa-v4compatibility.ttf") format("truetype");
+  unicode-range: U+F041,U+F047,U+F065-F066,U+F07D-F07E,U+F080,U+F08B,U+F08E,U+F090,U+F09A,U+F0AC,U+F0AE,U+F0B2,U+F0D0,U+F0D6,U+F0E4,U+F0EC,U+F10A-F10B,U+F123,U+F13E,U+F148-F149,U+F14C,U+F156,U+F15E,U+F160-F161,U+F163,U+F175-F178,U+F195,U+F1F8,U+F219,U+F250,U+F252,U+F27A; }
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.7.0_highlight.min.js b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.7.0_highlight.min.js
new file mode 100644
index 0000000..4cbf349
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.7.0_highlight.min.js
@@ -0,0 +1,1202 @@
+/*!
+  Highlight.js v11.7.0 (git: 82688fad18)
+  (c) 2006-2022 undefined and other contributors
+  License: BSD-3-Clause
+ */
+var hljs=function(){"use strict";var e={exports:{}};function n(e){
+return e instanceof Map?e.clear=e.delete=e.set=()=>{
+throw Error("map is read-only")}:e instanceof Set&&(e.add=e.clear=e.delete=()=>{
+throw Error("set is read-only")
+}),Object.freeze(e),Object.getOwnPropertyNames(e).forEach((t=>{var a=e[t]
+;"object"!=typeof a||Object.isFrozen(a)||n(a)})),e}
+e.exports=n,e.exports.default=n;class t{constructor(e){
+void 0===e.data&&(e.data={}),this.data=e.data,this.isMatchIgnored=!1}
+ignoreMatch(){this.isMatchIgnored=!0}}function a(e){
+return e.replace(/&/g,"&").replace(//g,">").replace(/"/g,""").replace(/'/g,"'")
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new file mode 100644
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diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.7.0_languages_python.min.js b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.7.0_languages_python.min.js
new file mode 100644
index 0000000..19ab974
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.7.0_languages_python.min.js
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diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.7.0_styles_github.min.css b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.7.0_styles_github.min.css
new file mode 100644
index 0000000..275239a
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+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.7.0_styles_github.min.css
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+  Description: Light theme as seen on github.com
+  Author: github.com
+  Maintainer: @Hirse
+  Updated: 2021-05-15
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+  Current colors taken from GitHub's CSS
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new file mode 100644
index 0000000..8826d2f
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.9.0_styles_github-dark.css
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+pre code.hljs {
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+  overflow-x: auto;
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+}
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+  padding: 3px 5px
+}
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+  Theme: GitHub Dark
+  Description: Dark theme as seen on github.com
+  Author: github.com
+  Maintainer: @Hirse
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+}
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+}
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new file mode 100644
index 0000000..9140f80
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_highlight.js_11.9.0_styles_intellij-light.css
@@ -0,0 +1,107 @@
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+  overflow-x: auto;
+  padding: 1em
+}
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+}
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+Intellij-light style (c) Pegasis 
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+}
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+}
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+}
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+}
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+}
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index 0000000..f3218b3
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+
+//# sourceMappingURL=../../min-maps/vs/loader.js.map
\ No newline at end of file
diff --git a/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_monaco-editor_0.49.0_min_vs_loader.js b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_monaco-editor_0.49.0_min_vs_loader.js
new file mode 100644
index 0000000..48e8875
--- /dev/null
+++ b/javascript/extLibs/http_cdnjs.cloudflare.com_ajax_libs_monaco-editor_0.49.0_min_vs_loader.js
@@ -0,0 +1,11 @@
+"use strict";/*!-----------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Version: 0.49.0(383fdf3fc0e1e1a024068b8d0fd4f3dcbae74d04)
+ * Released under the MIT license
+ * https://github.com/microsoft/vscode/blob/main/LICENSE.txt
+ *-----------------------------------------------------------*/const _amdLoaderGlobal=this,_commonjsGlobal=typeof global=="object"?global:{};var AMDLoader;(function(u){u.global=_amdLoaderGlobal;class y{get isWindows(){return this._detect(),this._isWindows}get isNode(){return this._detect(),this._isNode}get isElectronRenderer(){return this._detect(),this._isElectronRenderer}get isWebWorker(){return this._detect(),this._isWebWorker}get isElectronNodeIntegrationWebWorker(){return this._detect(),this._isElectronNodeIntegrationWebWorker}constructor(){this._detected=!1,this._isWindows=!1,this._isNode=!1,this._isElectronRenderer=!1,this._isWebWorker=!1,this._isElectronNodeIntegrationWebWorker=!1}_detect(){this._detected||(this._detected=!0,this._isWindows=y._isWindows(),this._isNode=typeof module<"u"&&!!module.exports,this._isElectronRenderer=typeof process<"u"&&typeof process.versions<"u"&&typeof process.versions.electron<"u"&&process.type==="renderer",this._isWebWorker=typeof 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diff --git a/library/QQDecryption.dll b/library/QQDecryption.dll
new file mode 100644
index 0000000..f913352
Binary files /dev/null and b/library/QQDecryption.dll differ
diff --git a/library/UnlockQQ.exe b/library/UnlockQQ.exe
new file mode 100644
index 0000000..ea62dd3
Binary files /dev/null and b/library/UnlockQQ.exe differ
diff --git a/libs/JNC-1.0-jnc.jar b/libs/JNC-1.0-jnc.jar
new file mode 100644
index 0000000..f3825c2
Binary files /dev/null and b/libs/JNC-1.0-jnc.jar differ
diff --git a/src/main/Cpp/QQDecryption/QQDecryption.vcxproj b/src/main/Cpp/QQDecryption/QQDecryption.vcxproj
new file mode 100644
index 0000000..c92d9f7
--- /dev/null
+++ b/src/main/Cpp/QQDecryption/QQDecryption.vcxproj
@@ -0,0 +1,162 @@
+
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+    QQDecryption
+    10.0.20348.0
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+  
+    
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+  
+    
+  
+  
+    
+  
+  
+    
+  
+  
+  
+    C:\Users\Administrator\.jdks\corretto-20.0.2.1\include\win32;C:\Users\Administrator\.jdks\corretto-20.0.2.1\include;$(IncludePath)
+  
+  
+    
+      Level3
+      true
+      WIN32;_DEBUG;QQDECRYPTION_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)
+      true
+      Use
+      pch.h
+    
+    
+      Windows
+      true
+      false
+    
+  
+  
+    
+      Level3
+      true
+      true
+      true
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+    
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+      true
+      Use
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+    
+    
+      Windows
+      true
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+    
+  
+  
+    
+      Level3
+      true
+      true
+      true
+      NDEBUG;QQDECRYPTION_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)
+      true
+      Use
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+    
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diff --git a/src/main/Cpp/QQDecryption/QQDecryption.vcxproj.filters b/src/main/Cpp/QQDecryption/QQDecryption.vcxproj.filters
new file mode 100644
index 0000000..2013b37
--- /dev/null
+++ b/src/main/Cpp/QQDecryption/QQDecryption.vcxproj.filters
@@ -0,0 +1,39 @@
+
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+    
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+      {93995380-89BD-4b04-88EB-625FBE52EBFB}
+      h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd
+    
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+      {67DA6AB6-F800-4c08-8B7A-83BB121AAD01}
+      rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms
+    
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\ No newline at end of file
diff --git a/src/main/Cpp/QQDecryption/QQDecryption.vcxproj.user b/src/main/Cpp/QQDecryption/QQDecryption.vcxproj.user
new file mode 100644
index 0000000..5df420f
--- /dev/null
+++ b/src/main/Cpp/QQDecryption/QQDecryption.vcxproj.user
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+
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+  
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\ No newline at end of file
diff --git a/src/main/Cpp/QQDecryption/dllmain.cpp b/src/main/Cpp/QQDecryption/dllmain.cpp
new file mode 100644
index 0000000..f14db96
--- /dev/null
+++ b/src/main/Cpp/QQDecryption/dllmain.cpp
@@ -0,0 +1,60 @@
+// dllmain.cpp : 定义 DLL 应用程序的入口点。
+#include "pch.h"
+
+HMODULE hInjectedModule = 0;
+
+// 修改后的导出函数定义（接受两个独立参数）
+extern "C" __declspec(dllexport) void __stdcall RemoteDecrypt(LPVOID lpParam) {
+    DecryptParams* pParams = static_cast(lpParam);
+    // 直接使用 params.src 和 params.dst
+    const wchar_t* src = pParams->src;
+    const wchar_t* dst = pParams->dst;
+
+    // 加载QQMusicCommon.dll函数
+    HMODULE hLib = LoadLibraryW(L"QQMusicCommon.dll");
+    if (!hLib) return;
+
+    typedef void* (__thiscall* EncConstructor)(void*);
+    typedef void(__thiscall* EncDestructor)(void*);
+    typedef BOOL(__thiscall* EncOpen)(void*, const wchar_t*, BOOL, BOOL);
+    typedef DWORD(__thiscall* EncGetSize)(void*);
+    typedef DWORD(__thiscall* EncRead)(void*, BYTE*, DWORD, __int64);
+
+    EncConstructor pConstructor = (EncConstructor)GetProcAddress(hLib, "??0EncAndDesMediaFile@@QAE@XZ");
+    EncDestructor pDestructor = (EncDestructor)GetProcAddress(hLib, "??1EncAndDesMediaFile@@QAE@XZ");
+    EncOpen pOpen = (EncOpen)GetProcAddress(hLib, "?Open@EncAndDesMediaFile@@QAE_NPB_W_N1@Z");
+    EncGetSize pGetSize = (EncGetSize)GetProcAddress(hLib, "?GetSize@EncAndDesMediaFile@@QAEKXZ");
+    EncRead pRead = (EncRead)GetProcAddress(hLib, "?Read@EncAndDesMediaFile@@QAEKPAEK_J@Z");
+
+    if (!pConstructor || !pDestructor || !pOpen || !pGetSize || !pRead) {
+        FreeLibrary(hLib);
+        return;
+    }
+
+    // 执行解密
+    BYTE obj[0x28] = { 0 };
+    pConstructor(obj);
+    if (pOpen(obj, src, TRUE, FALSE)) {
+        DWORD size = pGetSize(obj);
+        BYTE* buffer = new BYTE[size];
+        if (pRead(obj, buffer, size, 0) == size) {
+            std::ofstream out(dst, std::ios::binary);
+            out.write(reinterpret_cast(buffer), size);
+            out.close();
+        }
+        delete[] buffer;
+    }
+    pDestructor(obj);
+    FreeLibrary(hLib);
+}
+
+// DLL入口点
+BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) {
+    if (ul_reason_for_call == DLL_PROCESS_ATTACH) {
+        // 可选：自动解密示例文件（需根据实际路径调整）
+        // DecryptFileInProcess(L"C:\\Music\\encrypted.mflac", L"C:\\Music\\decrypted.flac");
+        hInjectedModule = hModule;
+    }
+    return TRUE;
+}
+
diff --git a/src/main/Cpp/QQDecryption/framework.h b/src/main/Cpp/QQDecryption/framework.h
new file mode 100644
index 0000000..80cbbc9
--- /dev/null
+++ b/src/main/Cpp/QQDecryption/framework.h
@@ -0,0 +1,5 @@
+#pragma once
+
+#define WIN32_LEAN_AND_MEAN             // 从 Windows 头文件中排除极少使用的内容
+// Windows 头文件
+#include 
diff --git a/src/main/Cpp/QQDecryption/org_QQdecryption_QQMusicAutoDecryptor.cpp b/src/main/Cpp/QQDecryption/org_QQdecryption_QQMusicAutoDecryptor.cpp
new file mode 100644
index 0000000..0776783
--- /dev/null
+++ b/src/main/Cpp/QQDecryption/org_QQdecryption_QQMusicAutoDecryptor.cpp
@@ -0,0 +1,156 @@
+#include "pch.h"
+
+#include 
+#include 
+#include 
+#include 
+
+// 嵼ԭͣDLLʵ֣
+typedef void(__stdcall* RemoteDecryptFunc)(LPVOID lpParam);
+
+
+// QQֽPID
+DWORD FindQQMusicPID() {
+    PROCESSENTRY32W pe32 = { sizeof(PROCESSENTRY32W) };
+    HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
+    DWORD pid = 0;
+
+    if (Process32FirstW(hSnapshot, &pe32)) {
+        do {
+            if (wcscmp(pe32.szExeFile, L"QQMusic.exe") == 0) {
+                pid = pe32.th32ProcessID;
+                break;
+            }
+        } while (Process32NextW(hSnapshot, &pe32));
+    }
+
+    CloseHandle(hSnapshot);
+    return pid;
+}
+
+// עDLLԶ̺
+bool InjectAndCallDecrypt(DWORD pid, const wchar_t* src, const wchar_t* dst) {
+    // ȡǰDLL·ʹõǰģַ
+    wchar_t dllPath[MAX_PATH] = { 0 };
+    HMODULE hCurrentModule = NULL;
+
+    // ַͨȡǰģ
+    if (!GetModuleHandleExW(
+        GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
+        (LPCWSTR)&InjectAndCallDecrypt,  // ⵱ǰģеĵַ
+        &hCurrentModule
+    )) {
+        return false;
+    }
+    GetModuleFileNameW(hCurrentModule, dllPath, MAX_PATH);
+
+    // Ŀ
+    HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);
+    if (!hProcess) return false;
+
+    // ڴдDLL·
+    SIZE_T pathSize = (wcslen(dllPath) + 1) * sizeof(wchar_t);
+    LPVOID pRemoteDllPath = VirtualAllocEx(hProcess, NULL, pathSize, MEM_COMMIT, PAGE_READWRITE);
+    if (!pRemoteDllPath || !WriteProcessMemory(hProcess, pRemoteDllPath, dllPath, pathSize, NULL)) {
+        CloseHandle(hProcess);
+        return false;
+    }
+
+    // עDLL
+    HANDLE hThread = CreateRemoteThread(
+        hProcess,
+        NULL,
+        0,
+        (LPTHREAD_START_ROUTINE)GetProcAddress(GetModuleHandleW(L"kernel32.dll"), "LoadLibraryW"),
+        pRemoteDllPath,
+        0,
+        NULL
+    );
+    if (!hThread) {
+        VirtualFreeEx(hProcess, pRemoteDllPath, 0, MEM_RELEASE);
+        CloseHandle(hProcess);
+        return false;
+    }
+
+    WaitForSingleObject(hThread, INFINITE);
+
+    // ȡעDLLַ
+    DWORD_PTR dllBaseAddr = 0;
+    GetExitCodeThread(hThread, (LPDWORD)&dllBaseAddr);
+    CloseHandle(hThread);
+
+    // Զַ̺ؼ޸IJ֣
+    // 1ȡغַģַ
+    HMODULE hLocalModule = GetModuleHandleW(dllPath); // صǰеͬDLL
+    if (!hLocalModule) {
+        VirtualFreeEx(hProcess, pRemoteDllPath, 0, MEM_RELEASE);
+        CloseHandle(hProcess);
+        return false;
+    }
+
+    // 2ȡڱģеĵַע⣩
+    RemoteDecryptFunc pLocalFunc = (RemoteDecryptFunc)GetProcAddress(hLocalModule,
+#ifdef _WIN32
+        "_RemoteDecrypt@4"  // 32λ
+#else
+        "RemoteDecrypt"     // 64λ
+#endif
+
+    );
+    if (!pLocalFunc) {
+        VirtualFreeEx(hProcess, pRemoteDllPath, 0, MEM_RELEASE);
+        CloseHandle(hProcess);
+        return false;
+    }
+
+    // 3㺯ƫ
+    DWORD_PTR funcOffset = (DWORD_PTR)pLocalFunc - (DWORD_PTR)hLocalModule;
+
+    // 4Զַ̺
+    RemoteDecryptFunc pRemoteFunc = (RemoteDecryptFunc)(dllBaseAddr + funcOffset);
+
+    // ׼
+    DecryptParams localParams = { 0 };
+    wcscpy_s(localParams.src, MAX_PATH, src);
+    wcscpy_s(localParams.dst, MAX_PATH, dst);
+
+    // Ŀд
+    LPVOID pRemoteParams = VirtualAllocEx(hProcess, NULL, sizeof(DecryptParams), MEM_COMMIT, PAGE_READWRITE);
+    if (!pRemoteParams || !WriteProcessMemory(hProcess, pRemoteParams, &localParams, sizeof(DecryptParams), NULL)) {
+        VirtualFreeEx(hProcess, pRemoteDllPath, 0, MEM_RELEASE);
+        CloseHandle(hProcess);
+        return false;
+    }
+
+    // Զ̵߳ýܺ
+    hThread = CreateRemoteThread(
+        hProcess,
+        NULL,
+        0,
+        (LPTHREAD_START_ROUTINE)pRemoteFunc,
+        pRemoteParams,
+        0,
+        NULL
+    );
+    if (!hThread) {
+        VirtualFreeEx(hProcess, pRemoteParams, 0, MEM_RELEASE);
+        VirtualFreeEx(hProcess, pRemoteDllPath, 0, MEM_RELEASE);
+        CloseHandle(hProcess);
+        return false;
+    }
+
+    // ȴִ
+    WaitForSingleObject(hThread, INFINITE);
+
+    // Դ
+    VirtualFreeEx(hProcess, pRemoteDllPath, 0, MEM_RELEASE);
+    VirtualFreeEx(hProcess, pRemoteParams, 0, MEM_RELEASE);
+    CloseHandle(hThread);
+    CloseHandle(hProcess);
+    return true;
+}
+
+extern "C" __declspec(dllexport) void Execute(const wchar_t* src, const wchar_t* dst)
+{
+    InjectAndCallDecrypt(FindQQMusicPID(), src, dst);
+}
diff --git a/src/main/Cpp/QQDecryption/org_QQdecryption_QQMusicAutoDecryptor.h b/src/main/Cpp/QQDecryption/org_QQdecryption_QQMusicAutoDecryptor.h
new file mode 100644
index 0000000..592fee9
--- /dev/null
+++ b/src/main/Cpp/QQDecryption/org_QQdecryption_QQMusicAutoDecryptor.h
@@ -0,0 +1,21 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include 
+/* Header for class org_QQdecryption_QQMusicAutoDecryptor */
+
+#ifndef _Included_org_QQdecryption_QQMusicAutoDecryptor
+#define _Included_org_QQdecryption_QQMusicAutoDecryptor
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class:     org_QQdecryption_QQMusicAutoDecryptor
+ * Method:    decrypt
+ * Signature: (Ljava/lang/String;Ljava/lang/String;)V
+ */
+JNIEXPORT void JNICALL Java_org_QQdecryption_QQMusicAutoDecryptor_decrypt
+  (JNIEnv *, jclass, jstring, jstring);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/src/main/Cpp/QQDecryption/pch.cpp b/src/main/Cpp/QQDecryption/pch.cpp
new file mode 100644
index 0000000..b6fb8f4
--- /dev/null
+++ b/src/main/Cpp/QQDecryption/pch.cpp
@@ -0,0 +1,5 @@
+// pch.cpp: 与预编译标头对应的源文件
+
+#include "pch.h"
+
+// 当使用预编译的头时，需要使用此源文件，编译才能成功。
diff --git a/src/main/Cpp/QQDecryption/pch.h b/src/main/Cpp/QQDecryption/pch.h
new file mode 100644
index 0000000..3f6f390
--- /dev/null
+++ b/src/main/Cpp/QQDecryption/pch.h
@@ -0,0 +1,45 @@
+// pch.h: 这是预编译标头文件。
+// 下方列出的文件仅编译一次，提高了将来生成的生成性能。
+// 这还将影响 IntelliSense 性能，包括代码完成和许多代码浏览功能。
+// 但是，如果此处列出的文件中的任何一个在生成之间有更新，它们全部都将被重新编译。
+// 请勿在此处添加要频繁更新的文件，这将使得性能优势无效。
+
+#ifndef PCH_H
+#define PCH_H
+
+// 添加要在此处预编译的标头
+#include "framework.h"
+
+#include 
+#include 
+#include 
+
+
+#pragma pack(push, 1)  
+struct DecryptParams {
+    wchar_t src[MAX_PATH];  // 源文件路径
+    wchar_t dst[MAX_PATH];  // 目标文件路径
+};
+#pragma pack(pop)
+
+// 导出函数声明
+extern "C" __declspec(dllexport) void __stdcall RemoteDecrypt(LPVOID lpParam);
+
+// 目标DLL函数声明
+typedef void* (__thiscall* EncConstructor)(void* thisPtr);
+typedef void(__thiscall* EncDestructor)(void* thisPtr);
+typedef BOOL(__thiscall* EncOpen)(void* thisPtr, const wchar_t* path, BOOL a1, BOOL a2);
+typedef DWORD(__thiscall* EncGetSize)(void* thisPtr);
+typedef DWORD(__thiscall* EncRead)(void* thisPtr, BYTE* buf, DWORD size, __int64 offset);
+
+// 全局函数指针
+extern EncConstructor pConstructor;
+extern EncDestructor pDestructor;
+extern EncOpen pOpen;
+extern EncGetSize pGetSize;
+extern EncRead pRead;
+extern HMODULE hTargetDll;
+extern HMODULE hInjectedModule;
+
+
+#endif //PCH_H
diff --git a/src/main/Cpp/UnlockQQ/UnlockQQ.cpp b/src/main/Cpp/UnlockQQ/UnlockQQ.cpp
new file mode 100644
index 0000000..117fb8c
--- /dev/null
+++ b/src/main/Cpp/UnlockQQ/UnlockQQ.cpp
@@ -0,0 +1,49 @@
+#include 
+#include 
+#include 
+#include 
+
+// DLL function declaration
+extern "C" __declspec(dllimport) void Execute(const wchar_t* src, const wchar_t* dst);
+
+// Set console to UTF-8 mode
+void SetConsoleUTF8() {
+    _setmode(_fileno(stdout), _O_U8TEXT);
+    _setmode(_fileno(stderr), _O_U8TEXT);
+    SetConsoleOutputCP(CP_UTF8);
+}
+
+int wmain(int argc, wchar_t* argv[]) {
+    // Initialize console encoding
+    SetConsoleUTF8();
+
+    if (argc != 3) {
+        std::wcerr << L"Usage: " << argv[0]
+            << L"  " << std::endl;
+        return 1;
+    }
+
+    // Verify parameters
+    std::wstring src(argv[1]);
+    std::wstring dst(argv[2]);
+
+    try {
+        // Debug output
+        std::wcout << L"Processing file:\nSource: " << src
+            << L"\nDestination: " << dst << std::endl;
+
+        // Call DLL function
+        Execute(src.c_str(), dst.c_str());
+
+        std::wcout << L"Operation completed successfully!" << std::endl;
+        return 0;
+    }
+    catch (const std::exception& e) {
+        std::cerr << "Error: " << e.what() << std::endl;
+        return 2;
+    }
+    catch (...) {
+        std::cerr << "Unknown error occurred!" << std::endl;
+        return 3;
+    }
+}
\ No newline at end of file
diff --git a/src/main/Cpp/UnlockQQ/UnlockQQ.vcxproj b/src/main/Cpp/UnlockQQ/UnlockQQ.vcxproj
new file mode 100644
index 0000000..e6ae199
--- /dev/null
+++ b/src/main/Cpp/UnlockQQ/UnlockQQ.vcxproj
@@ -0,0 +1,137 @@
+
+
+  
+    
+      Debug
+      Win32
+    
+    
+      Release
+      Win32
+    
+    
+      Debug
+      x64
+    
+    
+      Release
+      x64
+    
+  
+  
+    17.0
+    Win32Proj
+    {5f9e6925-65ba-4c62-839c-7ceb7c735e2b}
+    UnlockQQ
+    10.0.20348.0
+  
+  
+  
+    Application
+    true
+    v143
+    Unicode
+  
+  
+    Application
+    false
+    v143
+    true
+    Unicode
+  
+  
+    Application
+    true
+    v143
+    Unicode
+  
+  
+    Application
+    false
+    v143
+    true
+    Unicode
+  
+  
+  
+  
+  
+  
+  
+    
+  
+  
+    
+  
+  
+    
+  
+  
+    
+  
+  
+  
+    
+      Level3
+      true
+      WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)
+      true
+    
+    
+      Console
+      true
+    
+  
+  
+    
+      Level3
+      true
+      true
+      true
+      WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
+      true
+    
+    
+      Console
+      true
+      true
+      true
+      C:\Users\Administrator\source\repos\QQDecryption\Release;%(AdditionalLibraryDirectories)
+      QQDecryption.lib;%(AdditionalDependencies)
+    
+  
+  
+    
+      Level3
+      true
+      _DEBUG;_CONSOLE;%(PreprocessorDefinitions)
+      true
+    
+    
+      Console
+      true
+    
+  
+  
+    
+      Level3
+      true
+      true
+      true
+      NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
+      true
+    
+    
+      Console
+      true
+      true
+      true
+    
+  
+  
+    
+  
+  
+  
+  
+
\ No newline at end of file
diff --git a/src/main/Cpp/UnlockQQ/UnlockQQ.vcxproj.filters b/src/main/Cpp/UnlockQQ/UnlockQQ.vcxproj.filters
new file mode 100644
index 0000000..a52362c
--- /dev/null
+++ b/src/main/Cpp/UnlockQQ/UnlockQQ.vcxproj.filters
@@ -0,0 +1,22 @@
+
+
+  
+    
+      {4FC737F1-C7A5-4376-A066-2A32D752A2FF}
+      cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx
+    
+    
+      {93995380-89BD-4b04-88EB-625FBE52EBFB}
+      h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd
+    
+    
+      {67DA6AB6-F800-4c08-8B7A-83BB121AAD01}
+      rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms
+    
+  
+  
+    
+      源文件
+    
+  
+
\ No newline at end of file
diff --git a/src/main/Cpp/UnlockQQ/UnlockQQ.vcxproj.user b/src/main/Cpp/UnlockQQ/UnlockQQ.vcxproj.user
new file mode 100644
index 0000000..88a5509
--- /dev/null
+++ b/src/main/Cpp/UnlockQQ/UnlockQQ.vcxproj.user
@@ -0,0 +1,4 @@
+
+
+  
+
\ No newline at end of file
diff --git a/src/main/java/com/axis/innovators/box/AxisInnovatorsBox.java b/src/main/java/com/axis/innovators/box/AxisInnovatorsBox.java
index 6ff62b7..1c4aa22 100644
--- a/src/main/java/com/axis/innovators/box/AxisInnovatorsBox.java
+++ b/src/main/java/com/axis/innovators/box/AxisInnovatorsBox.java
@@ -37,7 +37,7 @@ import java.util.Map;
  */
 public class AxisInnovatorsBox {
     private static final Logger logger = LogManager.getLogger(AxisInnovatorsBox.class);
-    private static final String VERSIONS = "0.0.2";
+    private static final String VERSIONS = "0.1.2";
     private static final String[] AUTHOR = new String[]{
             "tzdwindows 7"
     };
@@ -71,7 +71,6 @@ public class AxisInnovatorsBox {
             LibraryLoad.loadLibrary("ThrowSafely");
         } catch (Exception e) {
             logger.error("Failed to load the 'FridaNative' library", e);
-            throw new RuntimeException(e);
         }
     }
 
@@ -421,7 +420,6 @@ public class AxisInnovatorsBox {
             logger.error("In unexpected errors", e);
             main.ex.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
             main.organizingCrashReports(e);
-            throw new RuntimeException(e);
         }
     }
 
diff --git a/src/main/java/com/axis/innovators/box/Main.java b/src/main/java/com/axis/innovators/box/Main.java
index de6caa9..ad5e0bd 100644
--- a/src/main/java/com/axis/innovators/box/Main.java
+++ b/src/main/java/com/axis/innovators/box/Main.java
@@ -1,6 +1,7 @@
 package com.axis.innovators.box;
 
 import com.axis.innovators.box.browser.MainApplication;
+import com.axis.innovators.box.browser.WindowRegistry;
 import com.axis.innovators.box.decompilation.gui.ModernJarViewer;
 import com.axis.innovators.box.tools.ArgsParser;
 import com.axis.innovators.box.tools.FolderCleaner;
diff --git a/src/main/java/com/axis/innovators/box/browser/CefAppManager.java b/src/main/java/com/axis/innovators/box/browser/CefAppManager.java
index 5ab3595..711e451 100644
--- a/src/main/java/com/axis/innovators/box/browser/CefAppManager.java
+++ b/src/main/java/com/axis/innovators/box/browser/CefAppManager.java
@@ -57,6 +57,9 @@ public class CefAppManager {
         try {
             settings.windowless_rendering_enabled = false;
             settings.javascript_flags = "--expose-gc";
+            settings.cache_path = FolderCreator.getLibraryFolder() + "/jcef/cache";
+            settings.root_cache_path = FolderCreator.getLibraryFolder() + "/jcef/cache";
+            settings.persist_session_cookies = true;
             settings.log_severity = CefSettings.LogSeverity.LOGSEVERITY_VERBOSE;
 
             String subprocessPath = FolderCreator.getLibraryFolder() + "/jcef/lib/win64/jcef_helper.exe";
diff --git a/src/main/java/com/axis/innovators/box/browser/MainApplication.java b/src/main/java/com/axis/innovators/box/browser/MainApplication.java
index bd77c7d..1b73c18 100644
--- a/src/main/java/com/axis/innovators/box/browser/MainApplication.java
+++ b/src/main/java/com/axis/innovators/box/browser/MainApplication.java
@@ -1,5 +1,6 @@
 package com.axis.innovators.box.browser;
 
+import com.axis.innovators.box.browser.util.CodeExecutor;
 import com.axis.innovators.box.tools.FolderCreator;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
@@ -8,6 +9,11 @@ import org.cef.browser.CefFrame;
 import org.cef.browser.CefMessageRouter;
 import org.cef.callback.CefQueryCallback;
 import org.cef.handler.CefMessageRouterHandlerAdapter;
+import org.graalvm.polyglot.Context;
+import org.graalvm.polyglot.PolyglotException;
+import org.graalvm.polyglot.Value;
+import org.json.JSONObject;
+import org.python.util.PythonInterpreter;
 import org.tzd.lm.LM;
 
 import javax.swing.*;
@@ -28,13 +34,14 @@ import java.util.concurrent.atomic.AtomicReference;
  * 这是一个简单的示例程序，用于展示如何使用JCEF来创建一个简单的浏览器窗口。
  * @author tzdwindows 7
  */
+
 public class MainApplication {
     private static final ExecutorService executor = Executors.newCachedThreadPool();
     private static long modelHandle;
     private static long ctxHandle;
     private static boolean isSystem = true;
     public static void main(String[] args) {
-        //popupHTMLWindow();
+
     }
 
 
@@ -79,6 +86,118 @@ public class MainApplication {
         });
     }
 
+    public static void popupCCodeEditorWindow() {
+        AtomicReference window = new AtomicReference<>();
+        SwingUtilities.invokeLater(() -> {
+            WindowRegistry.getInstance().createNewWindow("main", builder ->
+                    window.set(builder.title("TzdC 代码编辑器")
+                            .icon(new ImageIcon(Objects.requireNonNull(MainApplication.class.getClassLoader().getResource("icons/logo.png"))).getImage())
+                            .size(1487, 836)
+                            .htmlPath(FolderCreator.getJavaScriptFolder() + "\\" + "CCodeEditor.html")
+                            .operationHandler(createOperationHandler())
+                            .build())
+            );
+
+            CefMessageRouter msgRouter = window.get().getMsgRouter();
+            if (msgRouter != null) {
+                msgRouter.addHandler(new CefMessageRouterHandlerAdapter() {
+                    @Override
+                    public boolean onQuery(CefBrowser browser, CefFrame frame, long queryId,
+                                           String request, boolean persistent, CefQueryCallback callback) {
+                        try {
+                            JSONObject requestJson = new JSONObject(request);
+                            if ("executeCode".equals(requestJson.optString("type"))) {
+                                String code = requestJson.optString("code");
+                                String language = requestJson.optString("language");
+
+                                // 调用代码执行逻辑
+                                String result = CodeExecutor.executeCode(code, language,null);
+
+                                JSONObject response = new JSONObject();
+                                response.put("status", "success");
+                                response.put("output", result);
+                                callback.success(response.toString());
+                                return true;
+                            }
+                        } catch (Exception e) {
+                            JSONObject error = new JSONObject();
+                            error.put("status", "error");
+                            error.put("message", e.getMessage());
+                            callback.failure(500, error.toString());
+                        }
+                        return false;
+                    }
+
+                    @Override
+                    public void onQueryCanceled(CefBrowser browser, CefFrame frame, long queryId) {
+                        // 处理请求取消
+                    }
+                }, true);
+            }
+        });
+    }
+    public static void popupCodeEditorWindow() {
+        AtomicReference window = new AtomicReference<>();
+        SwingUtilities.invokeLater(() -> {
+            WindowRegistry.getInstance().createNewWindow("main", builder ->
+                    window.set(builder.title("代码编辑器")
+                            .icon(new ImageIcon(Objects.requireNonNull(MainApplication.class.getClassLoader().getResource("icons/logo.png"))).getImage())
+                            .size(1487, 836)
+                            .htmlPath(FolderCreator.getJavaScriptFolder() + "\\" + "CodeEditor.html")
+                            .operationHandler(createOperationHandler())
+                            .build())
+            );
+
+            CefMessageRouter msgRouter = window.get().getMsgRouter();
+            if (msgRouter != null) {
+                msgRouter.addHandler(new CefMessageRouterHandlerAdapter() {
+                    @Override
+                    public boolean onQuery(CefBrowser browser, CefFrame frame, long queryId,
+                                           String request, boolean persistent, CefQueryCallback callback) {
+                        try {
+                            JSONObject requestJson = new JSONObject(request);
+                            if ("executeCode".equals(requestJson.optString("type"))) {
+                                String code = requestJson.optString("code");
+                                String language = requestJson.optString("language");
+
+                                // 调用代码执行逻辑
+                                String result = executeCode(code, language);
+
+                                JSONObject response = new JSONObject();
+                                response.put("status", "success");
+                                response.put("output", result);
+                                callback.success(response.toString());
+                                return true;
+                            }
+                        } catch (Exception e) {
+                            JSONObject error = new JSONObject();
+                            error.put("status", "error");
+                            error.put("message", e.getMessage());
+                            callback.failure(500, error.toString());
+                        }
+                        return false;
+                    }
+
+                    @Override
+                    public void onQueryCanceled(CefBrowser browser, CefFrame frame, long queryId) {
+                        // 处理请求取消
+                    }
+                }, true);
+            }
+        });
+    }
+
+    public static String executeCode(String code, String language) {
+        return CodeExecutor.executeCode(code, language,new CodeExecutor.OutputListener() {
+            @Override
+            public void onOutput(String newOutput) {}
+        });
+    }
+
+    private static Value executeC(Context context, String code) {
+        return context.eval("c", code);
+    }
+
     /**
      * 弹出html预览窗口
      */
@@ -107,11 +226,11 @@ public class MainApplication {
 
                                 Path filePath = Paths.get(path);
 
-                                //// 验证文件存在性
-                                //if (!Files.exists(filePath)) {
-                                //    callback.failure(404, "{\"code\":404,\"message\":\"文件未找到\"}");
-                                //    return true;
-                                //}
+                                // 验证文件存在性
+                                if (!Files.exists(filePath)) {
+                                    callback.failure(404, "{\"code\":404,\"message\":\"文件未找到\"}");
+                                    return true;
+                                }
 
                                 // 读取文件内容
                                 String content = Files.readString(filePath, StandardCharsets.UTF_8);
diff --git a/src/main/java/com/axis/innovators/box/browser/WindowRegistry.java b/src/main/java/com/axis/innovators/box/browser/WindowRegistry.java
index cd9ffff..c874d6c 100644
--- a/src/main/java/com/axis/innovators/box/browser/WindowRegistry.java
+++ b/src/main/java/com/axis/innovators/box/browser/WindowRegistry.java
@@ -1,5 +1,14 @@
 package com.axis.innovators.box.browser;
 
+import com.axis.innovators.box.tools.FolderCreator;
+import org.cef.CefApp;
+import org.cef.browser.CefBrowser;
+import org.cef.browser.CefFrame;
+import org.cef.handler.CefLoadHandlerAdapter;
+import org.json.JSONObject;
+
+import java.io.File;
+import java.io.IOException;
 import java.util.Map;
 import java.util.concurrent.*;
 import java.util.function.Consumer;
@@ -58,6 +67,8 @@ public class WindowRegistry {
         config.accept(builder);
         BrowserWindow window = builder.build();
         registerWindow(window);
+
+        loadExtLibsPath(window);
     }
 
     /**
@@ -70,5 +81,59 @@ public class WindowRegistry {
         config.accept(builder);
         BrowserWindowJDialog window = builder.build();
         registerChildWindow(window);
+
+        loadExtLibsPath(window);
+    }
+
+    private void loadExtLibsPath(BrowserWindow window) {
+        CefBrowser cefBrowser = window.getBrowser();
+
+        if (cefBrowser != null)
+
+        // 使用 CefClient 的调度方法（如果可用）或直接添加 LoadHandler
+        cefBrowser.getClient().addLoadHandler(new CefLoadHandlerAdapter() {
+            @Override
+            public void onLoadEnd(CefBrowser browser, CefFrame frame, int httpStatusCode) {
+                if (frame.isMain()) {
+                    try {
+                        String extLibsPath = FolderCreator.getJavaScriptFolder() + "\\" + "extLibs";
+                        File extLibsDir = new File(extLibsPath);
+                        if (!extLibsDir.exists() || !extLibsDir.isDirectory()) {
+                            throw new IOException("extLibs目录无效: " + extLibsPath);
+                        }
+                        String script = "window.extLibsPath = " + JSONObject.valueToString(extLibsPath) + ";";
+                        browser.executeJavaScript(script, frame.getURL(), 0);
+                    } catch (Exception e) {
+                        System.err.println("注入extLibsPath失败: " + e.getMessage());
+                        e.printStackTrace();
+                    }
+                }
+            }
+        });
+    }
+    private void loadExtLibsPath(BrowserWindowJDialog window) {
+        CefBrowser cefBrowser = window.getBrowser();
+
+        if (cefBrowser != null)
+        // 使用 CefClient 的调度方法（如果可用）或直接添加 LoadHandler
+        cefBrowser.getClient().addLoadHandler(new CefLoadHandlerAdapter() {
+            @Override
+            public void onLoadEnd(CefBrowser browser, CefFrame frame, int httpStatusCode) {
+                if (frame.isMain()) {
+                    try {
+                        String extLibsPath = FolderCreator.getJavaScriptFolder() + "\\" + "extLibs";
+                        File extLibsDir = new File(extLibsPath);
+                        if (!extLibsDir.exists() || !extLibsDir.isDirectory()) {
+                            throw new IOException("extLibs目录无效: " + extLibsPath);
+                        }
+                        String script = "window.extLibsPath = " + JSONObject.valueToString(extLibsPath) + ";";
+                        browser.executeJavaScript(script, frame.getURL(), 0);
+                    } catch (Exception e) {
+                        System.err.println("注入extLibsPath失败: " + e.getMessage());
+                        e.printStackTrace();
+                    }
+                }
+            }
+        });
     }
 }
diff --git a/src/main/java/com/axis/innovators/box/browser/util/CodeExecutor.java b/src/main/java/com/axis/innovators/box/browser/util/CodeExecutor.java
new file mode 100644
index 0000000..3736596
--- /dev/null
+++ b/src/main/java/com/axis/innovators/box/browser/util/CodeExecutor.java
@@ -0,0 +1,392 @@
+package com.axis.innovators.box.browser.util;
+
+import com.axis.innovators.box.tools.LibraryLoad;
+import org.jnc.DllExtractor;
+import org.jnc.windows.JncNative;
+import org.python.util.PythonInterpreter;
+
+import javax.tools.JavaCompiler;
+import javax.tools.StandardJavaFileManager;
+import javax.tools.ToolProvider;
+import java.io.*;
+import java.lang.reflect.Field;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.concurrent.atomic.AtomicReference;
+
+public class CodeExecutor {
+    // 用于捕获输出的回调接口
+    public interface OutputListener {
+        void onOutput(String newOutput);
+    }
+
+    public static String executeCode(String code, String language, OutputListener listener) {
+        switch (language.toLowerCase()) {
+            case "python":
+                return executePythonNative(code, listener);
+            case "c":
+            case "cpp":
+                return executeC(code, listener);
+            case "java":
+                return executeJavaCode(code, listener);
+            default:
+                return "不支持的语言类型: " + language;
+        }
+    }
+
+    public static String executeJavaCode(String code, OutputListener listener) {
+        Path tempDir = null;
+        try {
+            // ===== 1. 创建临时目录 =====
+            tempDir = Files.createTempDirectory("javaCode");
+
+            // ===== 2. 写入Java源文件（强制UTF-8）=====
+            Path javaFile = tempDir.resolve("Main.java");
+            Files.writeString(javaFile,
+                    code,
+                    StandardCharsets.UTF_8
+            );
+
+            // ===== 3. 编译时指定编码 =====
+            JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
+            StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, StandardCharsets.UTF_8);
+
+            List options = new ArrayList<>();
+            options.add("-encoding");
+            options.add("UTF-8");
+            options.add("-d");
+            options.add(tempDir.toString());
+
+            JavaCompiler.CompilationTask task = compiler.getTask(
+                    null,
+                    fileManager,
+                    null,
+                    options,
+                    null,
+                    fileManager.getJavaFileObjects(javaFile)
+            );
+
+            if (!task.call()) {
+                return "编译失败";
+            }
+
+            // ===== 4. 执行配置 =====
+            String javaExe = Path.of(System.getProperty("java.home"), "bin", "java").toString();
+            ProcessBuilder pb = new ProcessBuilder(
+                    javaExe,
+                    "-Dfile.encoding=UTF-8",
+                    "-Dsun.stdout.encoding=UTF-8",  // 针对OpenJDK的特殊设置
+                    "-Dsun.stderr.encoding=UTF-8",
+                    "-cp",
+                    tempDir.toString(),
+                    "Main"
+            );
+
+            // ===== 5. 设置环境变量 =====
+            Map env = pb.environment();
+            env.put("JAVA_TOOL_OPTIONS", "-Dfile.encoding=UTF-8");
+            env.put("LANG", "en_US.UTF-8");  // Linux/macOS
+            env.put("LC_ALL", "en_US.UTF-8");
+
+            // ===== 6. 输出处理 =====
+            pb.redirectErrorStream(true);
+            Process process = pb.start();
+
+            try (BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(process.getInputStream(), StandardCharsets.UTF_8))) {
+
+                StringBuilder output = new StringBuilder();
+                char[] buffer = new char[4096];
+                int charsRead;
+
+                while ((charsRead = reader.read(buffer)) != -1) {
+                    String chunk = new String(buffer, 0, charsRead);
+                    output.append(chunk);
+                    if (listener != null) {
+                        // 处理控制台编码转换（Windows专用）
+                        if (System.getProperty("os.name").startsWith("Windows")) {
+                            chunk = new String(chunk.getBytes(StandardCharsets.UTF_8), "GBK");
+                        }
+                        listener.onOutput(chunk);
+                    }
+                }
+
+                int exitCode = process.waitFor();
+                return output.toString() + "\n退出码: " + exitCode;
+            }
+
+        } catch (Exception e) {
+            return "执行错误: " + e.getMessage();
+        } finally {
+            // 清理代码...
+        }
+    }
+
+
+    /**
+     * 需要用户安装python环境
+     */
+    private static String executePythonNative(String code, OutputListener listener) {
+        try {
+            Path pythonFile = Files.createTempFile("script_", ".py");
+            Files.writeString(pythonFile,
+                    "# -*- coding: utf-8 -*-\n" + code,
+                    StandardCharsets.UTF_8
+            );
+
+            ProcessBuilder pb = new ProcessBuilder("python", pythonFile.toString())
+                    .redirectErrorStream(true);
+
+            Map env = pb.environment();
+            env.put("PYTHONIOENCODING", "UTF-8");
+            env.put("PYTHONUTF8", "1");
+
+            Process process = pb.start();
+
+            StringBuilder output = new StringBuilder();
+            Thread outputThread = new Thread(() -> {
+                try (BufferedReader reader = new BufferedReader(
+                        new InputStreamReader(process.getInputStream(), StandardCharsets.UTF_8))) {
+                    String line;
+                    while ((line = reader.readLine()) != null) {
+                        String finalLine = line + "\n";
+                        output.append(finalLine);
+                        if (listener != null) {
+                            listener.onOutput(finalLine);
+                        }
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            });
+            outputThread.start();
+
+            // 等待执行完成
+            int exitCode = process.waitFor();
+            outputThread.join();
+
+            // 清理文件
+            Files.deleteIfExists(pythonFile);
+
+            return String.format("退出码: %d\n输出内容:\n%s", exitCode, output);
+
+        } catch (Exception e) {
+            return "执行错误: " + e.getMessage();
+        }
+    }
+
+    private static String executeC(String code, OutputListener listener) {
+        Path tempDir = null;
+        Path cFile = null;
+        Path exeFile = null;
+        try {
+            // 创建临时工作目录
+            tempDir = Files.createTempDirectory("c_compile_");
+
+            // 生成C源代码文件
+            cFile = tempDir.resolve("program.c");
+            Files.writeString(cFile, code, StandardCharsets.UTF_8);
+
+            // 生成可执行文件路径
+            exeFile = tempDir.resolve("program.exe");
+
+            // 1. 编译代码 -------------------------------------------------
+            String tccPath =System.getProperty("user.dir") + "/library/tcc/tcc.exe";
+
+            Process compileProcess;
+
+            if (listener != null) {
+                compileProcess = new ProcessBuilder(
+                        tccPath,
+                        "-o", exeFile.toString(),
+                        cFile.toString()
+                )
+                        .directory(tempDir.toFile())
+                        .redirectErrorStream(true)
+                        .start();
+
+                // 捕获编译输出
+                StringBuilder compileOutput = new StringBuilder();
+                Thread compileOutputThread = new Thread(() -> {
+                    try (BufferedReader reader = new BufferedReader(
+                            new InputStreamReader(compileProcess.getInputStream(), StandardCharsets.UTF_8))) {
+                        String line;
+                        while ((line = reader.readLine()) != null) {
+                            compileOutput.append(line).append("\n");
+                            if (listener != null) {
+                                listener.onOutput("[编译输出] " + line + "\n");
+                            }
+                        }
+                    } catch (IOException e) {
+                        e.printStackTrace();
+                    }
+                });
+                compileOutputThread.start();
+
+                // 等待编译完成
+                int compileExitCode = compileProcess.waitFor();
+                compileOutputThread.join(1000);
+
+                if (compileExitCode != 0) {
+                    return "编译失败:\n" + compileOutput;
+                }
+
+                // 2. 执行程序 -------------------------------------------------
+                Process executeProcess = new ProcessBuilder(exeFile.toString())
+                        .directory(tempDir.toFile())
+                        .redirectErrorStream(true)
+                        .start();
+
+                // 实时输出处理
+                AtomicReference execOutput = new AtomicReference<>(new StringBuilder());
+                Thread executeOutputThread = new Thread(() -> {
+                    try (BufferedReader reader = new BufferedReader(
+                            new InputStreamReader(executeProcess.getInputStream(), StandardCharsets.UTF_8))) {
+                        char[] buffer = new char[1024];
+                        int charsRead;
+                        while ((charsRead = reader.read(buffer)) != -1) {
+                            String outputChunk = new String(buffer, 0, charsRead);
+                            execOutput.get().append(outputChunk);
+                            if (listener != null) {
+                                listener.onOutput(outputChunk);
+                            }
+                        }
+                    } catch (IOException e) {
+                        e.printStackTrace();
+                    }
+                });
+                executeOutputThread.start();
+
+                // 等待执行完成（最多10秒）
+                boolean finished = executeProcess.waitFor(10, TimeUnit.SECONDS);
+                executeOutputThread.join(1000);
+
+                if (!finished) {
+                    executeProcess.destroyForcibly();
+                    return "执行超时\n部分输出:\n" + execOutput.get();
+                }
+
+                // 获取最终输出
+                String finalOutput = execOutput.get().toString();
+                int exitCode = executeProcess.exitValue();
+                return String.format("执行结果: %s\n退出码: %d\n输出内容:\n%s",
+                        exitCode == 0 ? "成功" : "失败",
+                        exitCode,
+                        finalOutput);
+            } else {
+                new ProcessBuilder(
+                        tccPath,
+                        "-o", exeFile.toString(),
+                        cFile.toString()
+                )
+                        .directory(tempDir.toFile())
+                        .redirectErrorStream(true)
+                        .start();
+
+                new ProcessBuilder(
+                        "cmd.exe",
+                        "/c",
+                        "start",
+                        "\"Tzd输出窗口\"",
+                        "cmd.exe",
+                        "/K",
+                        "chcp 65001 & ",
+                        exeFile.toString()
+                ).start();
+                return String.format("执行结果: %s\n退出码: %d\n输出内容:\n%s",
+                        "成功",
+                        0,
+                        "");
+            }
+
+        } catch (Exception e) {
+            return "执行错误: " + e.getMessage();
+        } finally {
+            // 清理临时文件
+            try {
+                if (listener != null){
+                    if (cFile != null) Files.deleteIfExists(cFile);
+                    if (exeFile != null) Files.deleteIfExists(exeFile);
+                    if (tempDir != null) Files.deleteIfExists(tempDir);
+                }
+            } catch (IOException e) {
+                System.err.println("临时文件清理失败: " + e.getMessage());
+            }
+        }
+    }
+
+    private static String captureProcessOutput(Process process, OutputListener listener)
+            throws IOException {
+        StringBuilder totalOutput = new StringBuilder();
+        try (BufferedReader reader = new BufferedReader(
+                new InputStreamReader(process.getInputStream()))) {
+
+            String line;
+            while ((line = reader.readLine()) != null) {
+                totalOutput.append(line).append("\n");
+                if (listener != null) {
+                    listener.onOutput(line + "\n");
+                }
+            }
+        }
+        return totalOutput.toString();
+    }
+
+    // 输出监控线程
+    private static class OutputMonitor implements Runnable {
+        private final BufferedReader reader;
+        private final OutputListener listener;
+        private volatile boolean running = true;
+        private final StringBuilder totalOutput = new StringBuilder();
+
+        public OutputMonitor(BufferedReader reader, OutputListener listener) {
+            this.reader = reader;
+            this.listener = listener;
+        }
+
+        public void run() {
+            try {
+                while (running) {
+                    if (reader.ready()) {
+                        String line = reader.readLine();
+                        if (line != null) {
+                            totalOutput.append(line).append("\n");
+                            if (listener != null) {
+                                listener.onOutput(line + "\n");
+                            }
+                        }
+                    } else {
+                        Thread.sleep(50);
+                    }
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+
+        public void stop() {
+            running = false;
+        }
+
+        public String getTotalOutput() {
+            return totalOutput.toString();
+        }
+    }
+
+    // 使用方法
+    public static void main(String[] args) {
+        String pythonCode = "#include \n" +
+                "\n" +
+                "int main() {\n" +
+                "    while (1){\n" +
+                "    printf(\"Hello World\\n\");\n" +
+                "}\n" +
+                "    return 0;\n" +
+                "}";
+        executeCode(pythonCode, "c", null);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/axis/innovators/box/register/RegistrationTool.java b/src/main/java/com/axis/innovators/box/register/RegistrationTool.java
index c8a67fb..65d665c 100644
--- a/src/main/java/com/axis/innovators/box/register/RegistrationTool.java
+++ b/src/main/java/com/axis/innovators/box/register/RegistrationTool.java
@@ -48,6 +48,7 @@ public class RegistrationTool {
             }
         }));
 
+
         MainWindow.ToolCategory programmingToolsCategory = new MainWindow.ToolCategory("编程工具",
                 "programming/programming.png",
                 "编程工具");
@@ -62,6 +63,26 @@ public class RegistrationTool {
             }
         }));
 
+        programmingToolsCategory.addTool(new MainWindow.ToolItem("C语言编辑器", "programming/LanguageEditor/file-editing.png",
+                "C语言编译器，智能化的idea" +
+                        "\n作者：tzdwindows 7", ++id, new AbstractAction() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+               // Window owner = SwingUtilities.windowForComponent((Component) e.getSource());
+                MainApplication.popupCCodeEditorWindow();
+            }
+        }));
+
+        programmingToolsCategory.addTool(new MainWindow.ToolItem("多语言在线执行（当遇到无限循环时会抛出错误）", "programming/LanguageEditor/file-editing.png",
+                "多语言在线执行，当遇到无限循环时会抛出错误" +
+                        "\n作者：tzdwindows 7", ++id, new AbstractAction() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                // Window owner = SwingUtilities.windowForComponent((Component) e.getSource());
+                MainApplication.popupCodeEditorWindow();
+            }
+        }));
+
         MainWindow.ToolCategory aICategory = new MainWindow.ToolCategory("AI工具",
                 "ai/ai.png",
                 "人工智能/大语言模型");
diff --git a/src/main/java/org/QQdecryption/QQMusicAutoDecryptor.java b/src/main/java/org/QQdecryption/QQMusicAutoDecryptor.java
new file mode 100644
index 0000000..fd7d472
--- /dev/null
+++ b/src/main/java/org/QQdecryption/QQMusicAutoDecryptor.java
@@ -0,0 +1,96 @@
+package org.QQdecryption;
+
+import com.axis.innovators.box.tools.FolderCreator;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.HashMap;
+import java.util.Map;
+
+public class QQMusicAutoDecryptor {
+
+    /**
+     * 解密QQ加密的文件
+     * @param inputPath 源文件路径
+     * @param outputDir 标准输出目录路径
+     */
+    public static void decrypt(String inputPath, String outputDir) {
+        try {
+            // 构建UnlockQQ.exe路径
+            String unlockExe = FolderCreator.getLibraryFolder() + File.separator + "UnlockQQ.exe";
+
+            // 处理输出文件名和路径
+            File inputFile = new File(inputPath);
+            String originalName = inputFile.getName();
+
+            // 创建扩展名映射表（可根据需要扩展）
+            Map formatMap = new HashMap<>() {{
+                put(".mflac", ".flac");
+                put(".mgg", ".ogg");
+                put(".qmc0", ".mp3");
+                put(".qmc3", ".mp3");
+                put(".qmcflac", ".flac");
+                put(".qmcogg", ".ogg");
+                put(".tkm", ".mp3");
+                put(".qmc2", ".mp3");
+                put(".bkcmp3", ".mp3");
+                put(".bkcflac", ".flac");
+                put(".ogg", ".ogg");
+            }};
+
+            // 自动识别并转换文件格式
+            String outputFileName = originalName;
+            int lastDotIndex = originalName.lastIndexOf('.');
+            if (lastDotIndex > 0) {
+                String ext = originalName.substring(lastDotIndex).toLowerCase();
+                if (formatMap.containsKey(ext)) {
+                    outputFileName = originalName.substring(0, lastDotIndex)
+                            + formatMap.get(ext);
+                } else {
+                    throw new RuntimeException("未知文件格式: " + ext);
+                }
+            }
+
+            File outputFile = new File(outputDir, outputFileName);
+
+            // 构建命令参数（处理带空格的路径）
+            String[] cmd = {
+                    unlockExe,
+                    "\"" + inputFile.getAbsolutePath() + "\"",
+                    "\"" + outputFile.getAbsolutePath() + "\""
+            };
+
+            // 执行解密命令
+            Process process = Runtime.getRuntime().exec(cmd);
+            int exitCode = process.waitFor();
+
+            // 检查执行结果
+            if (exitCode == 0) {
+                System.out.println("解密成功: " + outputFile.getAbsolutePath());
+
+            } else {
+                System.err.println("解密失败，错误码: " + exitCode);
+                printProcessError(process);
+            }
+
+        } catch (IOException | InterruptedException e) {
+            System.err.println("解密过程中出现异常: ");
+            e.printStackTrace();
+            throw new RuntimeException("解密过程中出现异常: ", e);
+        }
+    }
+
+    // 添加错误流打印方法
+    private static void printProcessError(Process process) throws IOException {
+        try (BufferedReader reader = new BufferedReader(
+                new InputStreamReader(process.getErrorStream()))) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                System.err.println("[EXE ERROR] " + line);
+                throw new RuntimeException("解密失败: " + line);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/org/QQdecryption/ui/DecryptionUI.java b/src/main/java/org/QQdecryption/ui/DecryptionUI.java
new file mode 100644
index 0000000..e037ba7
--- /dev/null
+++ b/src/main/java/org/QQdecryption/ui/DecryptionUI.java
@@ -0,0 +1,167 @@
+package org.QQdecryption.ui;
+
+import org.QQdecryption.QQMusicAutoDecryptor;
+import com.formdev.flatlaf.FlatIntelliJLaf;
+import javax.swing.*;
+import java.awt.*;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.dnd.DnDConstants;
+import java.awt.dnd.DropTarget;
+import java.awt.dnd.DropTargetAdapter;
+import java.awt.dnd.DropTargetDropEvent;
+import java.io.File;
+import java.util.List;
+
+public class DecryptionUI extends JFrame {
+    private JProgressBar progressBar;
+    private JTextArea logArea;
+
+    public DecryptionUI() {
+        initUI();
+        setupDnD();
+    }
+
+    private void initUI() {
+        setTitle("QQ音乐文件解锁工具 v2.1");
+        setDefaultCloseOperation(EXIT_ON_CLOSE);
+        setSize(800, 600);
+        setLocationRelativeTo(null);
+
+        setupModernLookAndFeel();
+
+        JPanel mainPanel = new JPanel(new BorderLayout(10, 10));
+        mainPanel.setBorder(BorderFactory.createEmptyBorder(15, 15, 15, 15));
+
+        // 拖放区域
+        JPanel dropZone = createDropZone();
+        mainPanel.add(dropZone, BorderLayout.CENTER);
+
+        // 控制面板
+        JPanel controlPanel = createControlPanel();
+        mainPanel.add(controlPanel, BorderLayout.SOUTH);
+
+        // 日志区域
+        logArea = new JTextArea();
+        logArea.setEditable(false);
+        JScrollPane scrollPane = new JScrollPane(logArea);
+        scrollPane.setPreferredSize(new Dimension(0, 150));
+        mainPanel.add(scrollPane, BorderLayout.SOUTH);
+
+        add(mainPanel);
+    }
+
+    private void setupModernLookAndFeel() {
+        try {
+            UIManager.setLookAndFeel(new FlatIntelliJLaf());
+        } catch (UnsupportedLookAndFeelException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private JPanel createDropZone() {
+        JPanel panel = new JPanel(new BorderLayout());
+        panel.setBorder(BorderFactory.createDashedBorder(null, 3, 5));
+        panel.setBackground(UIManager.getColor("Panel.background").darker());
+
+        JLabel dropLabel = new JLabel("拖放QQ音乐文件到此区域", SwingConstants.CENTER);
+        dropLabel.setFont(new Font("微软雅黑", Font.BOLD, 18));
+        dropLabel.setForeground(new Color(0x666666));
+        panel.add(dropLabel);
+
+        return panel;
+    }
+
+    private JPanel createControlPanel() {
+        JPanel panel = new JPanel(new FlowLayout(FlowLayout.LEFT, 10, 10));
+
+        // 进度条
+        progressBar = new JProgressBar();
+        progressBar.setPreferredSize(new Dimension(200, 20));
+        progressBar.setStringPainted(true);
+        panel.add(progressBar);
+
+        return panel;
+    }
+
+    private void setupDnD() {
+        new DropTarget(this, new DropTargetAdapter() {
+            @Override
+            public void drop(DropTargetDropEvent dtde) {
+                try {
+                    dtde.acceptDrop(DnDConstants.ACTION_COPY);
+                    List files = (List) dtde.getTransferable()
+                            .getTransferData(DataFlavor.javaFileListFlavor);
+                    processFiles(files);
+                } catch (Exception ex) {
+                    logError("文件拖放错误: " + ex.getMessage());
+                }
+            }
+        });
+    }
+
+    private void processFiles(List files) {
+        SwingWorker worker = new SwingWorker<>() {
+            @Override
+            protected Void doInBackground() {
+                progressBar.setIndeterminate(true);
+                for (File file : files) {
+                    decryptFile(file);
+                }
+                return null;
+            }
+
+            @Override
+            protected void done() {
+                progressBar.setIndeterminate(false);
+                JOptionPane.showMessageDialog(DecryptionUI.this,
+                        "处理完成！",
+                        "完成",
+                        JOptionPane.INFORMATION_MESSAGE);
+            }
+        };
+        worker.execute();
+    }
+
+    private void decryptFile(File inputFile) {
+        try {
+            logMessage("开始处理: " + inputFile.getName());
+
+            // 自动获取源文件所在目录
+            File outputDir = inputFile.getParentFile();
+
+            QQMusicAutoDecryptor.decrypt(
+                    inputFile.getAbsolutePath(),
+                    outputDir.getAbsolutePath()
+            );
+
+            logMessage("✓ 成功解密保存到: " + outputDir.getAbsolutePath());
+        } catch (Exception ex) {
+            logError("解密失败: " + ex.getMessage());
+        }
+    }
+
+    private void logMessage(String message) {
+        SwingUtilities.invokeLater(() -> {
+            logArea.append("[INFO] " + message + "\n");
+            logArea.setCaretPosition(logArea.getDocument().getLength());
+        });
+    }
+
+    private void logError(String error) {
+        SwingUtilities.invokeLater(() -> {
+            logArea.append("[ERROR] " + error + "\n");
+            logArea.setCaretPosition(logArea.getDocument().getLength());
+        });
+    }
+
+    public static void main(String[] args) {
+        EventQueue.invokeLater(() -> {
+            try {
+                UIManager.setLookAndFeel(new FlatIntelliJLaf());
+            } catch (UnsupportedLookAndFeelException e) {
+                e.printStackTrace();
+            }
+            new DecryptionUI().setVisible(true);
+        });
+    }
+}
\ No newline at end of file
diff --git a/src/main/resources/icons/programming/LanguageEditor/file-editing.png b/src/main/resources/icons/programming/LanguageEditor/file-editing.png
new file mode 100644
index 0000000..5ba3a0e
Binary files /dev/null and b/src/main/resources/icons/programming/LanguageEditor/file-editing.png differ