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From jensde...@apache.org
Subject [14/96] [abbrv] [partial] incubator-geode git commit: GEODE-12: rename pulse to gemfire-pulse and make build pass
Date Thu, 21 Jan 2016 22:54:55 GMT
http://git-wip-us.apache.org/repos/asf/incubator-geode/blob/446f451a/gemfire-pulse/src/main/webapp/scripts/multiselect/prettify.js
----------------------------------------------------------------------
diff --git a/gemfire-pulse/src/main/webapp/scripts/multiselect/prettify.js b/gemfire-pulse/src/main/webapp/scripts/multiselect/prettify.js
new file mode 100644
index 0000000..fa800db
--- /dev/null
+++ b/gemfire-pulse/src/main/webapp/scripts/multiselect/prettify.js
@@ -0,0 +1,1536 @@
+// Copyright (C) 2006 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview
+ * some functions for browser-side pretty printing of code contained in html.
+ * <p>
+ *
+ * For a fairly comprehensive set of languages see the
+ * <a href="http://google-code-prettify.googlecode.com/svn/trunk/README.html#langs">README</a>
+ * file that came with this source. At a minimum, the lexer should work on a
+ * number of languages including C and friends, Java, Python, Bash, SQL, HTML,
+ * XML, CSS, Javascript, and Makefiles. It works passably on Ruby, PHP and Awk
+ * and a subset of Perl, but, because of commenting conventions, doesn't work on
+ * Smalltalk, Lisp-like, or CAML-like languages without an explicit lang class.
+ * <p>
+ * Usage: <ol>
+ * <li> include this source file in an html page via
+ * {@code <script type="text/javascript" src="/path/to/prettify.js"></script>}
+ * <li> define style rules. See the example page for examples.
+ * <li> mark the {@code <pre>} and {@code <code>} tags in your source with
+ * {@code class=prettyprint.}
+ * You can also use the (html deprecated) {@code <xmp>} tag, but the pretty
+ * printer needs to do more substantial DOM manipulations to support that, so
+ * some css styles may not be preserved.
+ * </ol>
+ * That's it. I wanted to keep the API as simple as possible, so there's no
+ * need to specify which language the code is in, but if you wish, you can add
+ * another class to the {@code <pre>} or {@code <code>} element to specify the
+ * language, as in {@code <pre class="prettyprint lang-java">}. Any class that
+ * starts with "lang-" followed by a file extension, specifies the file type.
+ * See the "lang-*.js" files in this directory for code that implements
+ * per-language file handlers.
+ * <p>
+ * Change log:<br>
+ * cbeust, 2006/08/22
+ * <blockquote>
+ * Java annotations (start with "@") are now captured as literals ("lit")
+ * </blockquote>
+ * @requires console
+ * @overrides window
+ */
+
+// JSLint declarations
+/*global console, document, navigator, setTimeout, window */
+
+/**
+ * Split {@code prettyPrint} into multiple timeouts so as not to interfere with
+ * UI events. If set to {@code false}, {@code prettyPrint()} is synchronous.
+ */
+window['PR_SHOULD_USE_CONTINUATION'] = true;
+
+/** the number of characters between tab columns */
+window['PR_TAB_WIDTH'] = 8;
+
+/**
+ * Walks the DOM returning a properly escaped version of innerHTML.
+ * 
+ * @param {Node}
+ *          node
+ * @param {Array.
+ *          <string>} out output buffer that receives chunks of HTML.
+ */
+window['PR_normalizedHtml']
+
+/**
+ * Contains functions for creating and registering new language handlers.
+ * 
+ * @type {Object}
+ */
+= window['PR']
+
+/**
+ * Pretty print a chunk of code.
+ * 
+ * @param {string}
+ *          sourceCodeHtml code as html
+ * @return {string} code as html, but prettier
+ */
+= window['prettyPrintOne']
+/**
+ * Find all the {@code <pre>} and {@code <code>} tags in the DOM with
+ * {@code class=prettyprint} and prettify them.
+ * 
+ * @param {Function?}
+ *          opt_whenDone if specified, called when the last entry has been
+ *          finished.
+ */
+= window['prettyPrint'] = void 0;
+
+/**
+ * browser detection.
+ * 
+ * @extern
+ * @returns false if not IE, otherwise the major version.
+ */
+window['_pr_isIE6'] = function() {
+  var ieVersion = navigator && navigator.userAgent
+      && navigator.userAgent.match(/\bMSIE ([678])\./);
+  ieVersion = ieVersion ? +ieVersion[1] : false;
+  window['_pr_isIE6'] = function() {
+    return ieVersion;
+  };
+  return ieVersion;
+};
+
+(function() {
+  // Keyword lists for various languages.
+  var FLOW_CONTROL_KEYWORDS = "break continue do else for if return while ";
+  var C_KEYWORDS = FLOW_CONTROL_KEYWORDS + "auto case char const default "
+      + "double enum extern float goto int long register short signed sizeof "
+      + "static struct switch typedef union unsigned void volatile ";
+  var COMMON_KEYWORDS = C_KEYWORDS + "catch class delete false import "
+      + "new operator private protected public this throw true try typeof ";
+  var CPP_KEYWORDS = COMMON_KEYWORDS + "alignof align_union asm axiom bool "
+      + "concept concept_map const_cast constexpr decltype "
+      + "dynamic_cast explicit export friend inline late_check "
+      + "mutable namespace nullptr reinterpret_cast static_assert static_cast "
+      + "template typeid typename using virtual wchar_t where ";
+  var JAVA_KEYWORDS = COMMON_KEYWORDS
+      + "abstract boolean byte extends final finally implements import "
+      + "instanceof null native package strictfp super synchronized throws "
+      + "transient ";
+  var CSHARP_KEYWORDS = JAVA_KEYWORDS
+      + "as base by checked decimal delegate descending event "
+      + "fixed foreach from group implicit in interface internal into is lock "
+      + "object out override orderby params partial readonly ref sbyte sealed "
+      + "stackalloc string select uint ulong unchecked unsafe ushort var ";
+  var JSCRIPT_KEYWORDS = COMMON_KEYWORDS
+      + "debugger eval export function get null set undefined var with "
+      + "Infinity NaN ";
+  var PERL_KEYWORDS = "caller delete die do dump elsif eval exit foreach for "
+      + "goto if import last local my next no our print package redo require "
+      + "sub undef unless until use wantarray while BEGIN END ";
+  var PYTHON_KEYWORDS = FLOW_CONTROL_KEYWORDS + "and as assert class def del "
+      + "elif except exec finally from global import in is lambda "
+      + "nonlocal not or pass print raise try with yield " + "False True None ";
+  var RUBY_KEYWORDS = FLOW_CONTROL_KEYWORDS
+      + "alias and begin case class def"
+      + " defined elsif end ensure false in module next nil not or redo rescue "
+      + "retry self super then true undef unless until when yield BEGIN END ";
+  var SH_KEYWORDS = FLOW_CONTROL_KEYWORDS + "case done elif esac eval fi "
+      + "function in local set then until ";
+  var ALL_KEYWORDS = (CPP_KEYWORDS + CSHARP_KEYWORDS + JSCRIPT_KEYWORDS
+      + PERL_KEYWORDS + PYTHON_KEYWORDS + RUBY_KEYWORDS + SH_KEYWORDS);
+
+  // token style names. correspond to css classes
+  /** token style for a string literal */
+  var PR_STRING = 'str';
+  /** token style for a keyword */
+  var PR_KEYWORD = 'kwd';
+  /** token style for a comment */
+  var PR_COMMENT = 'com';
+  /** token style for a type */
+  var PR_TYPE = 'typ';
+  /** token style for a literal value. e.g. 1, null, true. */
+  var PR_LITERAL = 'lit';
+  /** token style for a punctuation string. */
+  var PR_PUNCTUATION = 'pun';
+  /** token style for a punctuation string. */
+  var PR_PLAIN = 'pln';
+
+  /** token style for an sgml tag. */
+  var PR_TAG = 'tag';
+  /** token style for a markup declaration such as a DOCTYPE. */
+  var PR_DECLARATION = 'dec';
+  /** token style for embedded source. */
+  var PR_SOURCE = 'src';
+  /** token style for an sgml attribute name. */
+  var PR_ATTRIB_NAME = 'atn';
+  /** token style for an sgml attribute value. */
+  var PR_ATTRIB_VALUE = 'atv';
+
+  /**
+   * A class that indicates a section of markup that is not code, e.g. to allow
+   * embedding of line numbers within code listings.
+   */
+  var PR_NOCODE = 'nocode';
+
+  /**
+   * A set of tokens that can precede a regular expression literal in
+   * javascript. http://www.mozilla.org/js/language/js20/rationale/syntax.html
+   * has the full list, but I've removed ones that might be problematic when
+   * seen in languages that don't support regular expression literals.
+   * 
+   * <p>
+   * Specifically, I've removed any keywords that can't precede a regexp literal
+   * in a syntactically legal javascript program, and I've removed the "in"
+   * keyword since it's not a keyword in many languages, and might be used as a
+   * count of inches.
+   * 
+   * <p>
+   * The link a above does not accurately describe EcmaScript rules since it
+   * fails to distinguish between (a=++/b/i) and (a++/b/i) but it works very
+   * well in practice.
+   * 
+   * @private
+   */
+  var REGEXP_PRECEDER_PATTERN = function() {
+    var preceders = [ "!", "!=", "!==", "#", "%", "%=", "&", "&&", "&&=", "&=",
+        "(", "*", "*=", /* "+", */"+=", ",", /* "-", */"-=", "->", /*
+                                                                     * ".",
+                                                                     * "..",
+                                                                     * "...",
+                                                                     * handled
+                                                                     * below
+                                                                     */
+        "/", "/=", ":", "::", ";", "<", "<<", "<<=", "<=", "=", "==", "===",
+        ">", ">=", ">>", ">>=", ">>>", ">>>=", "?", "@", "[", "^", "^=", "^^",
+        "^^=", "{", "|", "|=", "||", "||=", "~" /* handles =~ and !~ */,
+        "break", "case", "continue", "delete", "do", "else", "finally",
+        "instanceof", "return", "throw", "try", "typeof" ];
+    var pattern = '(?:^^|[+-]';
+    for ( var i = 0; i < preceders.length; ++i) {
+      pattern += '|' + preceders[i].replace(/([^=<>:&a-z])/g, '\\$1');
+    }
+    pattern += ')\\s*'; // matches at end, and matches empty string
+    return pattern;
+    // CAVEAT: this does not properly handle the case where a regular
+    // expression immediately follows another since a regular expression may
+    // have flags for case-sensitivity and the like. Having regexp tokens
+    // adjacent is not valid in any language I'm aware of, so I'm punting.
+    // TODO: maybe style special characters inside a regexp as punctuation.
+  }();
+
+  // Define regexps here so that the interpreter doesn't have to create an
+  // object each time the function containing them is called.
+  // The language spec requires a new object created even if you don't access
+  // the $1 members.
+  var pr_amp = /&/g;
+  var pr_lt = /</g;
+  var pr_gt = />/g;
+  var pr_quot = /\"/g;
+  /** like textToHtml but escapes double quotes to be attribute safe. */
+  function attribToHtml(str) {
+    return str.replace(pr_amp, '&amp;').replace(pr_lt, '&lt;').replace(pr_gt,
+        '&gt;').replace(pr_quot, '&quot;');
+  }
+
+  /** escapest html special characters to html. */
+  function textToHtml(str) {
+    return str.replace(pr_amp, '&amp;').replace(pr_lt, '&lt;').replace(pr_gt,
+        '&gt;');
+  }
+
+  var pr_ltEnt = /&lt;/g;
+  var pr_gtEnt = /&gt;/g;
+  var pr_aposEnt = /&apos;/g;
+  var pr_quotEnt = /&quot;/g;
+  var pr_ampEnt = /&amp;/g;
+  var pr_nbspEnt = /&nbsp;/g;
+  /** unescapes html to plain text. */
+  function htmlToText(html) {
+    var pos = html.indexOf('&');
+    if (pos < 0) {
+      return html;
+    }
+    // Handle numeric entities specially. We can't use functional substitution
+    // since that doesn't work in older versions of Safari.
+    // These should be rare since most browsers convert them to normal chars.
+    for (--pos; (pos = html.indexOf('&#', pos + 1)) >= 0;) {
+      var end = html.indexOf(';', pos);
+      if (end >= 0) {
+        var num = html.substring(pos + 3, end);
+        var radix = 10;
+        if (num && num.charAt(0) === 'x') {
+          num = num.substring(1);
+          radix = 16;
+        }
+        var codePoint = parseInt(num, radix);
+        if (!isNaN(codePoint)) {
+          html = (html.substring(0, pos) + String.fromCharCode(codePoint) + html
+              .substring(end + 1));
+        }
+      }
+    }
+
+    return html.replace(pr_ltEnt, '<').replace(pr_gtEnt, '>').replace(
+        pr_aposEnt, "'").replace(pr_quotEnt, '"').replace(pr_nbspEnt, ' ')
+        .replace(pr_ampEnt, '&');
+  }
+
+  /** is the given node's innerHTML normally unescaped? */
+  function isRawContent(node) {
+    return 'XMP' === node.tagName;
+  }
+
+  var newlineRe = /[\r\n]/g;
+  /**
+   * Are newlines and adjacent spaces significant in the given node's innerHTML?
+   */
+  function isPreformatted(node, content) {
+    // PRE means preformatted, and is a very common case, so don't create
+    // unnecessary computed style objects.
+    if ('PRE' === node.tagName) {
+      return true;
+    }
+    if (!newlineRe.test(content)) {
+      return true;
+    } // Don't care
+    var whitespace = '';
+    // For disconnected nodes, IE has no currentStyle.
+    if (node.currentStyle) {
+      whitespace = node.currentStyle.whiteSpace;
+    } else if (window.getComputedStyle) {
+      // Firefox makes a best guess if node is disconnected whereas Safari
+      // returns the empty string.
+      whitespace = window.getComputedStyle(node, null).whiteSpace;
+    }
+    return !whitespace || whitespace === 'pre';
+  }
+
+  function normalizedHtml(node, out) {
+    switch (node.nodeType) {
+    case 1: // an element
+      var name = node.tagName.toLowerCase();
+      out.push('<', name);
+      for ( var i = 0; i < node.attributes.length; ++i) {
+        var attr = node.attributes[i];
+        if (!attr.specified) {
+          continue;
+        }
+        out.push(' ');
+        normalizedHtml(attr, out);
+      }
+      out.push('>');
+      for ( var child = node.firstChild; child; child = child.nextSibling) {
+        normalizedHtml(child, out);
+      }
+      if (node.firstChild || !/^(?:br|link|img)$/.test(name)) {
+        out.push('<\/', name, '>');
+      }
+      break;
+    case 2: // an attribute
+      out.push(node.name.toLowerCase(), '="', attribToHtml(node.value), '"');
+      break;
+    case 3:
+    case 4: // text
+      out.push(textToHtml(node.nodeValue));
+      break;
+    }
+  }
+
+  /**
+   * Given a group of {@link RegExp}s, returns a {@code RegExp} that globally
+   * matches the union o the sets o strings matched d by the input RegExp. Since
+   * it matches globally, if the input strings have a start-of-input anchor
+   * (/^.../), it is ignored for the purposes of unioning.
+   * 
+   * @param {Array.
+   *          <RegExp>} regexs non multiline, non-global regexs.
+   * @return {RegExp} a global regex.
+   */
+  function combinePrefixPatterns(regexs) {
+    var capturedGroupIndex = 0;
+
+    var needToFoldCase = false;
+    var ignoreCase = false;
+    for ( var i = 0, n = regexs.length; i < n; ++i) {
+      var regex = regexs[i];
+      if (regex.ignoreCase) {
+        ignoreCase = true;
+      } else if (/[a-z]/i.test(regex.source.replace(
+          /\\u[0-9a-f]{4}|\\x[0-9a-f]{2}|\\[^ux]/gi, ''))) {
+        needToFoldCase = true;
+        ignoreCase = false;
+        break;
+      }
+    }
+
+    function decodeEscape(charsetPart) {
+      if (charsetPart.charAt(0) !== '\\') {
+        return charsetPart.charCodeAt(0);
+      }
+      switch (charsetPart.charAt(1)) {
+      case 'b':
+        return 8;
+      case 't':
+        return 9;
+      case 'n':
+        return 0xa;
+      case 'v':
+        return 0xb;
+      case 'f':
+        return 0xc;
+      case 'r':
+        return 0xd;
+      case 'u':
+      case 'x':
+        return parseInt(charsetPart.substring(2), 16)
+            || charsetPart.charCodeAt(1);
+      case '0':
+      case '1':
+      case '2':
+      case '3':
+      case '4':
+      case '5':
+      case '6':
+      case '7':
+        return parseInt(charsetPart.substring(1), 8);
+      default:
+        return charsetPart.charCodeAt(1);
+      }
+    }
+
+    function encodeEscape(charCode) {
+      if (charCode < 0x20) {
+        return (charCode < 0x10 ? '\\x0' : '\\x') + charCode.toString(16);
+      }
+      var ch = String.fromCharCode(charCode);
+      if (ch === '\\' || ch === '-' || ch === '[' || ch === ']') {
+        ch = '\\' + ch;
+      }
+      return ch;
+    }
+
+    function caseFoldCharset(charSet) {
+      var charsetParts = charSet.substring(1, charSet.length - 1).match(
+          new RegExp('\\\\u[0-9A-Fa-f]{4}' + '|\\\\x[0-9A-Fa-f]{2}'
+              + '|\\\\[0-3][0-7]{0,2}' + '|\\\\[0-7]{1,2}' + '|\\\\[\\s\\S]'
+              + '|-' + '|[^-\\\\]', 'g'));
+      var groups = [];
+      var ranges = [];
+      var inverse = charsetParts[0] === '^';
+      for ( var i = inverse ? 1 : 0, n = charsetParts.length; i < n; ++i) {
+        var p = charsetParts[i];
+        switch (p) {
+        case '\\B':
+        case '\\b':
+        case '\\D':
+        case '\\d':
+        case '\\S':
+        case '\\s':
+        case '\\W':
+        case '\\w':
+          groups.push(p);
+          continue;
+        }
+        var start = decodeEscape(p);
+        var end;
+        if (i + 2 < n && '-' === charsetParts[i + 1]) {
+          end = decodeEscape(charsetParts[i + 2]);
+          i += 2;
+        } else {
+          end = start;
+        }
+        ranges.push([ start, end ]);
+        // If the range might intersect letters, then expand it.
+        if (!(end < 65 || start > 122)) {
+          if (!(end < 65 || start > 90)) {
+            ranges.push([ Math.max(65, start) | 32, Math.min(end, 90) | 32 ]);
+          }
+          if (!(end < 97 || start > 122)) {
+            ranges
+                .push([ Math.max(97, start) & ~32, Math.min(end, 122) & ~32 ]);
+          }
+        }
+      }
+
+      // [[1, 10], [3, 4], [8, 12], [14, 14], [16, 16], [17, 17]]
+      // -> [[1, 12], [14, 14], [16, 17]]
+      ranges.sort(function(a, b) {
+        return (a[0] - b[0]) || (b[1] - a[1]);
+      });
+      var consolidatedRanges = [];
+      var lastRange = [ NaN, NaN ];
+      for ( var i = 0; i < ranges.length; ++i) {
+        var range = ranges[i];
+        if (range[0] <= lastRange[1] + 1) {
+          lastRange[1] = Math.max(lastRange[1], range[1]);
+        } else {
+          consolidatedRanges.push(lastRange = range);
+        }
+      }
+
+      var out = [ '[' ];
+      if (inverse) {
+        out.push('^');
+      }
+      out.push.apply(out, groups);
+      for ( var i = 0; i < consolidatedRanges.length; ++i) {
+        var range = consolidatedRanges[i];
+        out.push(encodeEscape(range[0]));
+        if (range[1] > range[0]) {
+          if (range[1] + 1 > range[0]) {
+            out.push('-');
+          }
+          out.push(encodeEscape(range[1]));
+        }
+      }
+      out.push(']');
+      return out.join('');
+    }
+
+    function allowAnywhereFoldCaseAndRenumberGroups(regex) {
+      // Split into character sets, escape sequences, punctuation strings
+      // like ('(', '(?:', ')', '^'), and runs of characters that do not
+      // include any of the above.
+      var parts = regex.source.match(new RegExp('(?:'
+          + '\\[(?:[^\\x5C\\x5D]|\\\\[\\s\\S])*\\]' // a character set
+          + '|\\\\u[A-Fa-f0-9]{4}' // a unicode escape
+          + '|\\\\x[A-Fa-f0-9]{2}' // a hex escape
+          + '|\\\\[0-9]+' // a back-reference or octal escape
+          + '|\\\\[^ux0-9]' // other escape sequence
+          + '|\\(\\?[:!=]' // start of a non-capturing group
+          + '|[\\(\\)\\^]' // start/emd of a group, or line start
+          + '|[^\\x5B\\x5C\\(\\)\\^]+' // run of other characters
+          + ')', 'g'));
+      var n = parts.length;
+
+      // Maps captured group numbers to the number they will occupy in
+      // the output or to -1 if that has not been determined, or to
+      // undefined if they need not be capturing in the output.
+      var capturedGroups = [];
+
+      // Walk over and identify back references to build the capturedGroups
+      // mapping.
+      for ( var i = 0, groupIndex = 0; i < n; ++i) {
+        var p = parts[i];
+        if (p === '(') {
+          // groups are 1-indexed, so max group index is count of '('
+          ++groupIndex;
+        } else if ('\\' === p.charAt(0)) {
+          var decimalValue = +p.substring(1);
+          if (decimalValue && decimalValue <= groupIndex) {
+            capturedGroups[decimalValue] = -1;
+          }
+        }
+      }
+
+      // Renumber groups and reduce capturing groups to non-capturing groups
+      // where possible.
+      for ( var i = 1; i < capturedGroups.length; ++i) {
+        if (-1 === capturedGroups[i]) {
+          capturedGroups[i] = ++capturedGroupIndex;
+        }
+      }
+      for ( var i = 0, groupIndex = 0; i < n; ++i) {
+        var p = parts[i];
+        if (p === '(') {
+          ++groupIndex;
+          if (capturedGroups[groupIndex] === undefined) {
+            parts[i] = '(?:';
+          }
+        } else if ('\\' === p.charAt(0)) {
+          var decimalValue = +p.substring(1);
+          if (decimalValue && decimalValue <= groupIndex) {
+            parts[i] = '\\' + capturedGroups[groupIndex];
+          }
+        }
+      }
+
+      // Remove any prefix anchors so that the output will match anywhere.
+      // ^^ really does mean an anchored match though.
+      for ( var i = 0, groupIndex = 0; i < n; ++i) {
+        if ('^' === parts[i] && '^' !== parts[i + 1]) {
+          parts[i] = '';
+        }
+      }
+
+      // Expand letters to groupts to handle mixing of case-sensitive and
+      // case-insensitive patterns if necessary.
+      if (regex.ignoreCase && needToFoldCase) {
+        for ( var i = 0; i < n; ++i) {
+          var p = parts[i];
+          var ch0 = p.charAt(0);
+          if (p.length >= 2 && ch0 === '[') {
+            parts[i] = caseFoldCharset(p);
+          } else if (ch0 !== '\\') {
+            // TODO: handle letters in numeric escapes.
+            parts[i] = p.replace(/[a-zA-Z]/g, function(ch) {
+              var cc = ch.charCodeAt(0);
+              return '[' + String.fromCharCode(cc & ~32, cc | 32) + ']';
+            });
+          }
+        }
+      }
+
+      return parts.join('');
+    }
+
+    var rewritten = [];
+    for ( var i = 0, n = regexs.length; i < n; ++i) {
+      var regex = regexs[i];
+      if (regex.global || regex.multiline) {
+        throw new Error('' + regex);
+      }
+      rewritten.push('(?:' + allowAnywhereFoldCaseAndRenumberGroups(regex)
+          + ')');
+    }
+
+    return new RegExp(rewritten.join('|'), ignoreCase ? 'gi' : 'g');
+  }
+
+  var PR_innerHtmlWorks = null;
+  function getInnerHtml(node) {
+    // inner html is hopelessly broken in Safari 2.0.4 when the content is
+    // an html description of well formed XML and the containing tag is a PRE
+    // tag, so we detect that case and emulate innerHTML.
+    if (null === PR_innerHtmlWorks) {
+      var testNode = document.createElement('PRE');
+      testNode.appendChild(document
+          .createTextNode('<!DOCTYPE foo PUBLIC "foo bar">\n<foo />'));
+      PR_innerHtmlWorks = !/</.test(testNode.innerHTML);
+    }
+
+    if (PR_innerHtmlWorks) {
+      var content = node.innerHTML;
+      // XMP tags contain unescaped entities so require special handling.
+      if (isRawContent(node)) {
+        content = textToHtml(content);
+      } else if (!isPreformatted(node, content)) {
+        content = content.replace(/(<br\s*\/?>)[\r\n]+/g, '$1').replace(
+            /(?:[\r\n]+[ \t]*)+/g, ' ');
+      }
+      return content;
+    }
+
+    var out = [];
+    for ( var child = node.firstChild; child; child = child.nextSibling) {
+      normalizedHtml(child, out);
+    }
+    return out.join('');
+  }
+
+  /**
+   * returns a function that expand tabs to spaces. This function can be fed
+   * successive chunks of text, and will maintain its own internal state to keep
+   * track of how tabs are expanded.
+   * 
+   * @return {function (string) : string} a function that takes plain text and
+   *         return the text with tabs expanded.
+   * @private
+   */
+  function makeTabExpander(tabWidth) {
+    var SPACES = ' ';
+    var charInLine = 0;
+
+    return function(plainText) {
+      // walk over each character looking for tabs and newlines.
+      // On tabs, expand them. On newlines, reset charInLine.
+      // Otherwise increment charInLine
+      var out = null;
+      var pos = 0;
+      for ( var i = 0, n = plainText.length; i < n; ++i) {
+        var ch = plainText.charAt(i);
+
+        switch (ch) {
+        case '\t':
+          if (!out) {
+            out = [];
+          }
+          out.push(plainText.substring(pos, i));
+          // calculate how much space we need in front of this part
+          // nSpaces is the amount of padding -- the number of spaces needed
+          // to move us to the next column, where columns occur at factors of
+          // tabWidth.
+          var nSpaces = tabWidth - (charInLine % tabWidth);
+          charInLine += nSpaces;
+          for (; nSpaces >= 0; nSpaces -= SPACES.length) {
+            out.push(SPACES.substring(0, nSpaces));
+          }
+          pos = i + 1;
+          break;
+        case '\n':
+          charInLine = 0;
+          break;
+        default:
+          ++charInLine;
+        }
+      }
+      if (!out) {
+        return plainText;
+      }
+      out.push(plainText.substring(pos));
+      return out.join('');
+    };
+  }
+
+  var pr_chunkPattern = new RegExp('[^<]+' // A run of characters other than
+                                            // '<'
+      + '|<\!--[\\s\\S]*?--\>' // an HTML comment
+      + '|<!\\[CDATA\\[[\\s\\S]*?\\]\\]>' // a CDATA section
+      // a probable tag that should not be highlighted
+      + '|<\/?[a-zA-Z](?:[^>\"\']|\'[^\']*\'|\"[^\"]*\")*>' + '|<', // A '<'
+                                                                    // that does
+                                                                    // not begin
+                                                                    // a larger
+                                                                    // chunk
+  'g');
+  var pr_commentPrefix = /^<\!--/;
+  var pr_cdataPrefix = /^<!\[CDATA\[/;
+  var pr_brPrefix = /^<br\b/i;
+  var pr_tagNameRe = /^<(\/?)([a-zA-Z][a-zA-Z0-9]*)/;
+
+  /**
+   * split markup into chunks of html tags (style null) and plain text (style
+   * {@link #PR_PLAIN}), converting tags which are significant for tokenization (<br>)
+   * into their textual equivalent.
+   * 
+   * @param {string}
+   *          s html where whitespace is considered significant.
+   * @return {Object} source code and extracted tags.
+   * @private
+   */
+  function extractTags(s) {
+    // since the pattern has the 'g' modifier and defines no capturing groups,
+    // this will return a list of all chunks which we then classify and wrap as
+    // PR_Tokens
+    var matches = s.match(pr_chunkPattern);
+    var sourceBuf = [];
+    var sourceBufLen = 0;
+    var extractedTags = [];
+    if (matches) {
+      for ( var i = 0, n = matches.length; i < n; ++i) {
+        var match = matches[i];
+        if (match.length > 1 && match.charAt(0) === '<') {
+          if (pr_commentPrefix.test(match)) {
+            continue;
+          }
+          if (pr_cdataPrefix.test(match)) {
+            // strip CDATA prefix and suffix. Don't unescape since it's CDATA
+            sourceBuf.push(match.substring(9, match.length - 3));
+            sourceBufLen += match.length - 12;
+          } else if (pr_brPrefix.test(match)) {
+            // <br> tags are lexically significant so convert them to text.
+            // This is undone later.
+            sourceBuf.push('\n');
+            ++sourceBufLen;
+          } else {
+            if (match.indexOf(PR_NOCODE) >= 0 && isNoCodeTag(match)) {
+              // A <span class="nocode"> will start a section that should be
+              // ignored. Continue walking the list until we see a matching end
+              // tag.
+              var name = match.match(pr_tagNameRe)[2];
+              var depth = 1;
+              var j;
+              end_tag_loop: for (j = i + 1; j < n; ++j) {
+                var name2 = matches[j].match(pr_tagNameRe);
+                if (name2 && name2[2] === name) {
+                  if (name2[1] === '/') {
+                    if (--depth === 0) {
+                      break end_tag_loop;
+                    }
+                  } else {
+                    ++depth;
+                  }
+                }
+              }
+              if (j < n) {
+                extractedTags.push(sourceBufLen, matches.slice(i, j + 1).join(
+                    ''));
+                i = j;
+              } else { // Ignore unclosed sections.
+                extractedTags.push(sourceBufLen, match);
+              }
+            } else {
+              extractedTags.push(sourceBufLen, match);
+            }
+          }
+        } else {
+          var literalText = htmlToText(match);
+          sourceBuf.push(literalText);
+          sourceBufLen += literalText.length;
+        }
+      }
+    }
+    return {
+      source : sourceBuf.join(''),
+      tags : extractedTags
+    };
+  }
+
+  /** True if the given tag contains a class attribute with the nocode class. */
+  function isNoCodeTag(tag) {
+    return !!tag
+        // First canonicalize the representation of attributes
+        .replace(/\s(\w+)\s*=\s*(?:\"([^\"]*)\"|'([^\']*)'|(\S+))/g,
+            ' $1="$2$3$4"')
+        // Then look for the attribute we want.
+        .match(/[cC][lL][aA][sS][sS]=\"[^\"]*\bnocode\b/);
+  }
+
+  /**
+   * Apply the given language handler to sourceCode and add the resulting
+   * decorations to out.
+   * 
+   * @param {number}
+   *          basePos the index of sourceCode within the chunk of source whose
+   *          decorations are already present on out.
+   */
+  function appendDecorations(basePos, sourceCode, langHandler, out) {
+    if (!sourceCode) {
+      return;
+    }
+    var job = {
+      source : sourceCode,
+      basePos : basePos
+    };
+    langHandler(job);
+    out.push.apply(out, job.decorations);
+  }
+
+  /**
+   * Given triples of [style, pattern, context] returns a lexing function, The
+   * lexing function interprets the patterns to find token boundaries and
+   * returns a decoration list of the form [index_0, style_0, index_1, style_1,
+   * ..., index_n, style_n] where index_n is an index into the sourceCode, and
+   * style_n is a style constant like PR_PLAIN. index_n-1 <= index_n, and
+   * style_n-1 applies to all characters in sourceCode[index_n-1:index_n].
+   * 
+   * The stylePatterns is a list whose elements have the form [style : string,
+   * pattern : RegExp, DEPRECATED, shortcut : string].
+   * 
+   * Style is a style constant like PR_PLAIN, or can be a string of the form
+   * 'lang-FOO', where FOO is a language extension describing the language of
+   * the portion of the token in $1 after pattern executes. E.g., if style is
+   * 'lang-lisp', and group 1 contains the text '(hello (world))', then that
+   * portion of the token will be passed to the registered lisp handler for
+   * formatting. The text before and after group 1 will be restyled using this
+   * decorator so decorators should take care that this doesn't result in
+   * infinite recursion. For example, the HTML lexer rule for SCRIPT elements
+   * looks something like ['lang-js', /<[s]cript>(.+?)<\/script>/]. This may
+   * match '<script>foo()<\/script>', which would cause the current decorator
+   * to be called with '<script>' which would not match the same rule since
+   * group 1 must not be empty, so it would be instead styled as PR_TAG by the
+   * generic tag rule. The handler registered for the 'js' extension would then
+   * be called with 'foo()', and finally, the current decorator would be called
+   * with '<\/script>' which would not match the original rule and so the
+   * generic tag rule would identify it as a tag.
+   * 
+   * Pattern must only match prefixes, and if it matches a prefix, then that
+   * match is considered a token with the same style.
+   * 
+   * Context is applied to the last non-whitespace, non-comment token
+   * recognized.
+   * 
+   * Shortcut is an optional string of characters, any of which, if the first
+   * character, gurantee that this pattern and only this pattern matches.
+   * 
+   * @param {Array}
+   *          shortcutStylePatterns patterns that always start with a known
+   *          character. Must have a shortcut string.
+   * @param {Array}
+   *          fallthroughStylePatterns patterns that will be tried in order if
+   *          the shortcut ones fail. May have shortcuts.
+   * 
+   * @return {function (Object)} a function that takes source code and returns a
+   *         list of decorations.
+   */
+  function createSimpleLexer(shortcutStylePatterns, fallthroughStylePatterns) {
+    var shortcuts = {};
+    var tokenizer;
+    (function() {
+      var allPatterns = shortcutStylePatterns.concat(fallthroughStylePatterns);
+      var allRegexs = [];
+      var regexKeys = {};
+      for ( var i = 0, n = allPatterns.length; i < n; ++i) {
+        var patternParts = allPatterns[i];
+        var shortcutChars = patternParts[3];
+        if (shortcutChars) {
+          for ( var c = shortcutChars.length; --c >= 0;) {
+            shortcuts[shortcutChars.charAt(c)] = patternParts;
+          }
+        }
+        var regex = patternParts[1];
+        var k = '' + regex;
+        if (!regexKeys.hasOwnProperty(k)) {
+          allRegexs.push(regex);
+          regexKeys[k] = null;
+        }
+      }
+      allRegexs.push(/[\0-\uffff]/);
+      tokenizer = combinePrefixPatterns(allRegexs);
+    })();
+
+    var nPatterns = fallthroughStylePatterns.length;
+    var notWs = /\S/;
+
+    /**
+     * Lexes job.source and produces an output array job.decorations of style
+     * classes preceded by the position at which they start in job.source in
+     * order.
+     * 
+     * @param {Object}
+     *          job an object like {@code source: {string} sourceText plain
+     *          text, basePos: {int} position of job.source in the larger chunk
+     *          of sourceCode. }
+     */
+    var decorate = function(job) {
+      var sourceCode = job.source, basePos = job.basePos;
+      /**
+       * Even entries are positions in source in ascending order. Odd enties are
+       * style markers (e.g., PR_COMMENT) that run from that position until the
+       * end.
+       * 
+       * @type {Array.<number|string>}
+       */
+      var decorations = [ basePos, PR_PLAIN ];
+      var pos = 0; // index into sourceCode
+      var tokens = sourceCode.match(tokenizer) || [];
+      var styleCache = {};
+
+      for ( var ti = 0, nTokens = tokens.length; ti < nTokens; ++ti) {
+        var token = tokens[ti];
+        var style = styleCache[token];
+        var match = void 0;
+
+        var isEmbedded;
+        if (typeof style === 'string') {
+          isEmbedded = false;
+        } else {
+          var patternParts = shortcuts[token.charAt(0)];
+          if (patternParts) {
+            match = token.match(patternParts[1]);
+            style = patternParts[0];
+          } else {
+            for ( var i = 0; i < nPatterns; ++i) {
+              patternParts = fallthroughStylePatterns[i];
+              match = token.match(patternParts[1]);
+              if (match) {
+                style = patternParts[0];
+                break;
+              }
+            }
+
+            if (!match) { // make sure that we make progress
+              style = PR_PLAIN;
+            }
+          }
+
+          isEmbedded = style.length >= 5 && 'lang-' === style.substring(0, 5);
+          if (isEmbedded && !(match && typeof match[1] === 'string')) {
+            isEmbedded = false;
+            style = PR_SOURCE;
+          }
+
+          if (!isEmbedded) {
+            styleCache[token] = style;
+          }
+        }
+
+        var tokenStart = pos;
+        pos += token.length;
+
+        if (!isEmbedded) {
+          decorations.push(basePos + tokenStart, style);
+        } else { // Treat group 1 as an embedded block of source code.
+          var embeddedSource = match[1];
+          var embeddedSourceStart = token.indexOf(embeddedSource);
+          var embeddedSourceEnd = embeddedSourceStart + embeddedSource.length;
+          if (match[2]) {
+            // If embeddedSource can be blank, then it would match at the
+            // beginning which would cause us to infinitely recurse on the
+            // entire token, so we catch the right context in match[2].
+            embeddedSourceEnd = token.length - match[2].length;
+            embeddedSourceStart = embeddedSourceEnd - embeddedSource.length;
+          }
+          var lang = style.substring(5);
+          // Decorate the left of the embedded source
+          appendDecorations(basePos + tokenStart, token.substring(0,
+              embeddedSourceStart), decorate, decorations);
+          // Decorate the embedded source
+          appendDecorations(basePos + tokenStart + embeddedSourceStart,
+              embeddedSource, langHandlerForExtension(lang, embeddedSource),
+              decorations);
+          // Decorate the right of the embedded section
+          appendDecorations(basePos + tokenStart + embeddedSourceEnd, token
+              .substring(embeddedSourceEnd), decorate, decorations);
+        }
+      }
+      job.decorations = decorations;
+    };
+    return decorate;
+  }
+
+  /**
+   * returns a function that produces a list of decorations from source text.
+   * 
+   * This code treats ", ', and ` as string delimiters, and \ as a string
+   * escape. It does not recognize perl's qq() style strings. It has no special
+   * handling for double delimiter escapes as in basic, or the tripled
+   * delimiters used in python, but should work on those regardless although in
+   * those cases a single string literal may be broken up into multiple adjacent
+   * string literals.
+   * 
+   * It recognizes C, C++, and shell style comments.
+   * 
+   * @param {Object}
+   *          options a set of optional parameters.
+   * @return {function (Object)} a function that examines the source code in the
+   *         input job and builds the decoration list.
+   */
+  function sourceDecorator(options) {
+    var shortcutStylePatterns = [], fallthroughStylePatterns = [];
+    if (options['tripleQuotedStrings']) {
+      // '''multi-line-string''', 'single-line-string', and double-quoted
+      shortcutStylePatterns
+          .push([
+              PR_STRING,
+              /^(?:\'\'\'(?:[^\'\\]|\\[\s\S]|\'{1,2}(?=[^\']))*(?:\'\'\'|$)|\"\"\"(?:[^\"\\]|\\[\s\S]|\"{1,2}(?=[^\"]))*(?:\"\"\"|$)|\'(?:[^\\\']|\\[\s\S])*(?:\'|$)|\"(?:[^\\\"]|\\[\s\S])*(?:\"|$))/,
+              null, '\'"' ]);
+    } else if (options['multiLineStrings']) {
+      // 'multi-line-string', "multi-line-string"
+      shortcutStylePatterns
+          .push([
+              PR_STRING,
+              /^(?:\'(?:[^\\\']|\\[\s\S])*(?:\'|$)|\"(?:[^\\\"]|\\[\s\S])*(?:\"|$)|\`(?:[^\\\`]|\\[\s\S])*(?:\`|$))/,
+              null, '\'"`' ]);
+    } else {
+      // 'single-line-string', "single-line-string"
+      shortcutStylePatterns.push([ PR_STRING,
+          /^(?:\'(?:[^\\\'\r\n]|\\.)*(?:\'|$)|\"(?:[^\\\"\r\n]|\\.)*(?:\"|$))/,
+          null, '"\'' ]);
+    }
+    if (options['verbatimStrings']) {
+      // verbatim-string-literal production from the C# grammar. See issue 93.
+      fallthroughStylePatterns.push([ PR_STRING, /^@\"(?:[^\"]|\"\")*(?:\"|$)/,
+          null ]);
+    }
+    if (options['hashComments']) {
+      if (options['cStyleComments']) {
+        // Stop C preprocessor declarations at an unclosed open comment
+        shortcutStylePatterns
+            .push([
+                PR_COMMENT,
+                /^#(?:(?:define|elif|else|endif|error|ifdef|include|ifndef|line|pragma|undef|warning)\b|[^\r\n]*)/,
+                null, '#' ]);
+        fallthroughStylePatterns
+            .push([
+                PR_STRING,
+                /^<(?:(?:(?:\.\.\/)*|\/?)(?:[\w-]+(?:\/[\w-]+)+)?[\w-]+\.h|[a-z]\w*)>/,
+                null ]);
+      } else {
+        shortcutStylePatterns.push([ PR_COMMENT, /^#[^\r\n]*/, null, '#' ]);
+      }
+    }
+    if (options['cStyleComments']) {
+      fallthroughStylePatterns.push([ PR_COMMENT, /^\/\/[^\r\n]*/, null ]);
+      fallthroughStylePatterns.push([ PR_COMMENT, /^\/\*[\s\S]*?(?:\*\/|$)/,
+          null ]);
+    }
+    if (options['regexLiterals']) {
+      var REGEX_LITERAL = (
+      // A regular expression literal starts with a slash that is
+      // not followed by * or / so that it is not confused with
+      // comments.
+      '/(?=[^/*])'
+      // and then contains any number of raw characters,
+      + '(?:[^/\\x5B\\x5C]'
+      // escape sequences (\x5C),
+      + '|\\x5C[\\s\\S]'
+      // or non-nesting character sets (\x5B\x5D);
+      + '|\\x5B(?:[^\\x5C\\x5D]|\\x5C[\\s\\S])*(?:\\x5D|$))+'
+      // finally closed by a /.
+      + '/');
+      fallthroughStylePatterns
+          .push([
+              'lang-regex',
+              new RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL
+                  + ')') ]);
+    }
+
+    var keywords = options['keywords'].replace(/^\s+|\s+$/g, '');
+    if (keywords.length) {
+      fallthroughStylePatterns.push([ PR_KEYWORD,
+          new RegExp('^(?:' + keywords.replace(/\s+/g, '|') + ')\\b'), null ]);
+    }
+
+    shortcutStylePatterns.push([ PR_PLAIN, /^\s+/, null, ' \r\n\t\xA0' ]);
+    fallthroughStylePatterns.push(
+    // TODO(mikesamuel): recognize non-latin letters and numerals in idents
+    [ PR_LITERAL, /^@[a-z_$][a-z_$@0-9]*/i, null ], [ PR_TYPE,
+        /^@?[A-Z]+[a-z][A-Za-z_$@0-9]*/, null ], [ PR_PLAIN,
+        /^[a-z_$][a-z_$@0-9]*/i, null ], [ PR_LITERAL, new RegExp('^(?:'
+    // A hex number
+    + '0x[a-f0-9]+'
+    // or an octal or decimal number,
+    + '|(?:\\d(?:_\\d+)*\\d*(?:\\.\\d*)?|\\.\\d\\+)'
+    // possibly in scientific notation
+    + '(?:e[+\\-]?\\d+)?' + ')'
+    // with an optional modifier like UL for unsigned long
+    + '[a-z]*', 'i'), null, '0123456789' ], [ PR_PUNCTUATION,
+        /^.[^\s\w\.$@\'\"\`\/\#]*/, null ]);
+
+    return createSimpleLexer(shortcutStylePatterns, fallthroughStylePatterns);
+  }
+
+  var decorateSource = sourceDecorator({
+    'keywords' : ALL_KEYWORDS,
+    'hashComments' : true,
+    'cStyleComments' : true,
+    'multiLineStrings' : true,
+    'regexLiterals' : true
+  });
+
+  /**
+   * Breaks {@code job.source} around style boundaries in
+   * {@code job.decorations} while re-interleaving {@code job.extractedTags},
+   * and leaves the result in {@code job.prettyPrintedHtml}.
+   * 
+   * @param {Object}
+   *          job like { source: {string} source as plain text, extractedTags:
+   *          {Array.<number|string>} extractedTags chunks of raw html preceded
+   *          by their position in {@code job.source} in order decorations:
+   *          {Array.<number|string} an array of style classes preceded by the
+   *          position at which they start in job.source in order }
+   * @private
+   */
+  function recombineTagsAndDecorations(job) {
+    var sourceText = job.source;
+    var extractedTags = job.extractedTags;
+    var decorations = job.decorations;
+
+    var html = [];
+    // index past the last char in sourceText written to html
+    var outputIdx = 0;
+
+    var openDecoration = null;
+    var currentDecoration = null;
+    var tagPos = 0; // index into extractedTags
+    var decPos = 0; // index into decorations
+    var tabExpander = makeTabExpander(window['PR_TAB_WIDTH']);
+
+    var adjacentSpaceRe = /([\r\n ]) /g;
+    var startOrSpaceRe = /(^| ) /gm;
+    var newlineRe = /\r\n?|\n/g;
+    var trailingSpaceRe = /[ \r\n]$/;
+    var lastWasSpace = true; // the last text chunk emitted ended with a space.
+
+    // A helper function that is responsible for opening sections of decoration
+    // and outputing properly escaped chunks of source
+    function emitTextUpTo(sourceIdx) {
+      if (sourceIdx > outputIdx) {
+        if (openDecoration && openDecoration !== currentDecoration) {
+          // Close the current decoration
+          html.push('</span>');
+          openDecoration = null;
+        }
+        if (!openDecoration && currentDecoration) {
+          openDecoration = currentDecoration;
+          html.push('<span class="', openDecoration, '">');
+        }
+        // This interacts badly with some wikis which introduces paragraph tags
+        // into pre blocks for some strange reason.
+        // It's necessary for IE though which seems to lose the preformattedness
+        // of <pre> tags when their innerHTML is assigned.
+        // http://stud3.tuwien.ac.at/~e0226430/innerHtmlQuirk.html
+        // and it serves to undo the conversion of <br>s to newlines done in
+        // chunkify.
+        var htmlChunk = textToHtml(
+            tabExpander(sourceText.substring(outputIdx, sourceIdx))).replace(
+            lastWasSpace ? startOrSpaceRe : adjacentSpaceRe, '$1&nbsp;');
+        // Keep track of whether we need to escape space at the beginning of the
+        // next chunk.
+        lastWasSpace = trailingSpaceRe.test(htmlChunk);
+        // IE collapses multiple adjacient <br>s into 1 line break.
+        // Prefix every <br> with '&nbsp;' can prevent such IE's behavior.
+        var lineBreakHtml = window['_pr_isIE6']() ? '&nbsp;<br />' : '<br />';
+        html.push(htmlChunk.replace(newlineRe, lineBreakHtml));
+        outputIdx = sourceIdx;
+      }
+    }
+
+    while (true) {
+      // Determine if we're going to consume a tag this time around. Otherwise
+      // we consume a decoration or exit.
+      var outputTag;
+      if (tagPos < extractedTags.length) {
+        if (decPos < decorations.length) {
+          // Pick one giving preference to extractedTags since we shouldn't open
+          // a new style that we're going to have to immediately close in order
+          // to output a tag.
+          outputTag = extractedTags[tagPos] <= decorations[decPos];
+        } else {
+          outputTag = true;
+        }
+      } else {
+        outputTag = false;
+      }
+      // Consume either a decoration or a tag or exit.
+      if (outputTag) {
+        emitTextUpTo(extractedTags[tagPos]);
+        if (openDecoration) {
+          // Close the current decoration
+          html.push('</span>');
+          openDecoration = null;
+        }
+        html.push(extractedTags[tagPos + 1]);
+        tagPos += 2;
+      } else if (decPos < decorations.length) {
+        emitTextUpTo(decorations[decPos]);
+        currentDecoration = decorations[decPos + 1];
+        decPos += 2;
+      } else {
+        break;
+      }
+    }
+    emitTextUpTo(sourceText.length);
+    if (openDecoration) {
+      html.push('</span>');
+    }
+    job.prettyPrintedHtml = html.join('');
+  }
+
+  /** Maps language-specific file extensions to handlers. */
+  var langHandlerRegistry = {};
+  /**
+   * Register a language handler for the given file extensions.
+   * 
+   * @param {function
+   *          (Object)} handler a function from source code to a list of
+   *          decorations. Takes a single argument job which describes the state
+   *          of the computation. The single parameter has the form {@code {
+   *          source: {string} as plain text. decorations: {Array.<number|string>}
+   *          an array of style classes preceded by the position at which they
+   *          start in job.source in order. The language handler should assigned
+   *          this field. basePos: {int} the position of source in the larger
+   *          source chunk. All positions in the output decorations array are
+   *          relative to the larger source chunk. } }
+   * @param {Array.
+   *          <string>} fileExtensions
+   */
+  function registerLangHandler(handler, fileExtensions) {
+    for ( var i = fileExtensions.length; --i >= 0;) {
+      var ext = fileExtensions[i];
+      if (!langHandlerRegistry.hasOwnProperty(ext)) {
+        langHandlerRegistry[ext] = handler;
+      } else if ('console' in window) {
+        console.warn('cannot override language handler %s', ext);
+      }
+    }
+  }
+  function langHandlerForExtension(extension, source) {
+    if (!(extension && langHandlerRegistry.hasOwnProperty(extension))) {
+      // Treat it as markup if the first non whitespace character is a < and
+      // the last non-whitespace character is a >.
+      extension = /^\s*</.test(source) ? 'default-markup' : 'default-code';
+    }
+    return langHandlerRegistry[extension];
+  }
+  registerLangHandler(decorateSource, [ 'default-code' ]);
+  registerLangHandler(createSimpleLexer([], [ [ PR_PLAIN, /^[^<?]+/ ],
+      [ PR_DECLARATION, /^<!\w[^>]*(?:>|$)/ ],
+      [ PR_COMMENT, /^<\!--[\s\S]*?(?:-\->|$)/ ],
+      // Unescaped content in an unknown language
+      [ 'lang-', /^<\?([\s\S]+?)(?:\?>|$)/ ],
+      [ 'lang-', /^<%([\s\S]+?)(?:%>|$)/ ],
+      [ PR_PUNCTUATION, /^(?:<[%?]|[%?]>)/ ],
+      [ 'lang-', /^<xmp\b[^>]*>([\s\S]+?)<\/xmp\b[^>]*>/i ],
+      // Unescaped content in javascript. (Or possibly vbscript).
+      [ 'lang-js', /^<script\b[^>]*>([\s\S]*?)(<\/script\b[^>]*>)/i ],
+      // Contains unescaped stylesheet content
+      [ 'lang-css', /^<style\b[^>]*>([\s\S]*?)(<\/style\b[^>]*>)/i ],
+      [ 'lang-in.tag', /^(<\/?[a-z][^<>]*>)/i ] ]), [ 'default-markup', 'htm',
+      'html', 'mxml', 'xhtml', 'xml', 'xsl' ]);
+  registerLangHandler(createSimpleLexer([
+      [ PR_PLAIN, /^[\s]+/, null, ' \t\r\n' ],
+      [ PR_ATTRIB_VALUE, /^(?:\"[^\"]*\"?|\'[^\']*\'?)/, null, '\"\'' ] ], [
+      [ PR_TAG, /^^<\/?[a-z](?:[\w.:-]*\w)?|\/?>$/i ],
+      [ PR_ATTRIB_NAME, /^(?!style[\s=]|on)[a-z](?:[\w:-]*\w)?/i ],
+      [ 'lang-uq.val', /^=\s*([^>\'\"\s]*(?:[^>\'\"\s\/]|\/(?=\s)))/ ],
+      [ PR_PUNCTUATION, /^[=<>\/]+/ ],
+      [ 'lang-js', /^on\w+\s*=\s*\"([^\"]+)\"/i ],
+      [ 'lang-js', /^on\w+\s*=\s*\'([^\']+)\'/i ],
+      [ 'lang-js', /^on\w+\s*=\s*([^\"\'>\s]+)/i ],
+      [ 'lang-css', /^style\s*=\s*\"([^\"]+)\"/i ],
+      [ 'lang-css', /^style\s*=\s*\'([^\']+)\'/i ],
+      [ 'lang-css', /^style\s*=\s*([^\"\'>\s]+)/i ] ]), [ 'in.tag' ]);
+  registerLangHandler(
+      createSimpleLexer([], [ [ PR_ATTRIB_VALUE, /^[\s\S]+/ ] ]), [ 'uq.val' ]);
+  registerLangHandler(sourceDecorator({
+    'keywords' : CPP_KEYWORDS,
+    'hashComments' : true,
+    'cStyleComments' : true
+  }), [ 'c', 'cc', 'cpp', 'cxx', 'cyc', 'm' ]);
+  registerLangHandler(sourceDecorator({
+    'keywords' : 'null true false'
+  }), [ 'json' ]);
+  registerLangHandler(sourceDecorator({
+    'keywords' : CSHARP_KEYWORDS,
+    'hashComments' : true,
+    'cStyleComments' : true,
+    'verbatimStrings' : true
+  }), [ 'cs' ]);
+  registerLangHandler(sourceDecorator({
+    'keywords' : JAVA_KEYWORDS,
+    'cStyleComments' : true
+  }), [ 'java' ]);
+  registerLangHandler(sourceDecorator({
+    'keywords' : SH_KEYWORDS,
+    'hashComments' : true,
+    'multiLineStrings' : true
+  }), [ 'bsh', 'csh', 'sh' ]);
+  registerLangHandler(sourceDecorator({
+    'keywords' : PYTHON_KEYWORDS,
+    'hashComments' : true,
+    'multiLineStrings' : true,
+    'tripleQuotedStrings' : true
+  }), [ 'cv', 'py' ]);
+  registerLangHandler(sourceDecorator({
+    'keywords' : PERL_KEYWORDS,
+    'hashComments' : true,
+    'multiLineStrings' : true,
+    'regexLiterals' : true
+  }), [ 'perl', 'pl', 'pm' ]);
+  registerLangHandler(sourceDecorator({
+    'keywords' : RUBY_KEYWORDS,
+    'hashComments' : true,
+    'multiLineStrings' : true,
+    'regexLiterals' : true
+  }), [ 'rb' ]);
+  registerLangHandler(sourceDecorator({
+    'keywords' : JSCRIPT_KEYWORDS,
+    'cStyleComments' : true,
+    'regexLiterals' : true
+  }), [ 'js' ]);
+  registerLangHandler(createSimpleLexer([], [ [ PR_STRING, /^[\s\S]+/ ] ]),
+      [ 'regex' ]);
+
+  function applyDecorator(job) {
+    var sourceCodeHtml = job.sourceCodeHtml;
+    var opt_langExtension = job.langExtension;
+
+    // Prepopulate output in case processing fails with an exception.
+    job.prettyPrintedHtml = sourceCodeHtml;
+
+    try {
+      // Extract tags, and convert the source code to plain text.
+      var sourceAndExtractedTags = extractTags(sourceCodeHtml);
+      /**
+       * Plain text.
+       * 
+       * @type {string}
+       */
+      var source = sourceAndExtractedTags.source;
+      job.source = source;
+      job.basePos = 0;
+
+      /**
+       * Even entries are positions in source in ascending order. Odd entries
+       * are tags that were extracted at that position.
+       * 
+       * @type {Array.<number|string>}
+       */
+      job.extractedTags = sourceAndExtractedTags.tags;
+
+      // Apply the appropriate language handler
+      langHandlerForExtension(opt_langExtension, source)(job);
+      // Integrate the decorations and tags back into the source code to produce
+      // a decorated html string which is left in job.prettyPrintedHtml.
+      recombineTagsAndDecorations(job);
+    } catch (e) {
+      if ('console' in window) {
+        console.log(e);
+        console.trace();
+      }
+    }
+  }
+
+  function prettyPrintOne(sourceCodeHtml, opt_langExtension) {
+    var job = {
+      sourceCodeHtml : sourceCodeHtml,
+      langExtension : opt_langExtension
+    };
+    applyDecorator(job);
+    return job.prettyPrintedHtml;
+  }
+
+  function prettyPrint(opt_whenDone) {
+    var isIE678 = window['_pr_isIE6']();
+    var ieNewline = isIE678 === 6 ? '\r\n' : '\r';
+    // See bug 71 and http://stackoverflow.com/questions/136443/why-doesnt-ie7-
+
+    // fetch a list of nodes to rewrite
+    var codeSegments = [ document.getElementsByTagName('pre'),
+        document.getElementsByTagName('code'),
+        document.getElementsByTagName('xmp') ];
+    var elements = [];
+    for ( var i = 0; i < codeSegments.length; ++i) {
+      for ( var j = 0, n = codeSegments[i].length; j < n; ++j) {
+        elements.push(codeSegments[i][j]);
+      }
+    }
+    codeSegments = null;
+
+    var clock = Date;
+    if (!clock['now']) {
+      clock = {
+        'now' : function() {
+          return (new Date).getTime();
+        }
+      };
+    }
+
+    // The loop is broken into a series of continuations to make sure that we
+    // don't make the browser unresponsive when rewriting a large page.
+    var k = 0;
+    var prettyPrintingJob;
+
+    function doWork() {
+      var endTime = (window['PR_SHOULD_USE_CONTINUATION'] ? clock.now() + 250 /* ms */
+          : Infinity);
+      for (; k < elements.length && clock.now() < endTime; k++) {
+        var cs = elements[k];
+        if (cs.className && cs.className.indexOf('prettyprint') >= 0) {
+          // If the classes includes a language extensions, use it.
+          // Language extensions can be specified like
+          // <pre class="prettyprint lang-cpp">
+          // the language extension "cpp" is used to find a language handler as
+          // passed to PR_registerLangHandler.
+          var langExtension = cs.className.match(/\blang-(\w+)\b/);
+          if (langExtension) {
+            langExtension = langExtension[1];
+          }
+
+          // make sure this is not nested in an already prettified element
+          var nested = false;
+          for ( var p = cs.parentNode; p; p = p.parentNode) {
+            if ((p.tagName === 'pre' || p.tagName === 'code' || p.tagName === 'xmp')
+                && p.className && p.className.indexOf('prettyprint') >= 0) {
+              nested = true;
+              break;
+            }
+          }
+          if (!nested) {
+            // fetch the content as a snippet of properly escaped HTML.
+            // Firefox adds newlines at the end.
+            var content = getInnerHtml(cs);
+            content = content.replace(/(?:\r\n?|\n)$/, '');
+
+            // do the pretty printing
+            prettyPrintingJob = {
+              sourceCodeHtml : content,
+              langExtension : langExtension,
+              sourceNode : cs
+            };
+            applyDecorator(prettyPrintingJob);
+            replaceWithPrettyPrintedHtml();
+          }
+        }
+      }
+      if (k < elements.length) {
+        // finish up in a continuation
+        setTimeout(doWork, 250);
+      } else if (opt_whenDone) {
+        opt_whenDone();
+      }
+    }
+
+    function replaceWithPrettyPrintedHtml() {
+      var newContent = prettyPrintingJob.prettyPrintedHtml;
+      if (!newContent) {
+        return;
+      }
+      var cs = prettyPrintingJob.sourceNode;
+
+      // push the prettified html back into the tag.
+      if (!isRawContent(cs)) {
+        // just replace the old html with the new
+        cs.innerHTML = newContent;
+      } else {
+        // we need to change the tag to a <pre> since <xmp>s do not allow
+        // embedded tags such as the span tags used to attach styles to
+        // sections of source code.
+        var pre = document.createElement('PRE');
+        for ( var i = 0; i < cs.attributes.length; ++i) {
+          var a = cs.attributes[i];
+          if (a.specified) {
+            var aname = a.name.toLowerCase();
+            if (aname === 'class') {
+              pre.className = a.value; // For IE 6
+            } else {
+              pre.setAttribute(a.name, a.value);
+            }
+          }
+        }
+        pre.innerHTML = newContent;
+
+        // remove the old
+        cs.parentNode.replaceChild(pre, cs);
+        cs = pre;
+      }
+
+      // Replace <br>s with line-feeds so that copying and pasting works
+      // on IE 6.
+      // Doing this on other browsers breaks lots of stuff since \r\n is
+      // treated as two newlines on Firefox, and doing this also slows
+      // down rendering.
+      if (isIE678 && cs.tagName === 'PRE') {
+        var lineBreaks = cs.getElementsByTagName('br');
+        for ( var j = lineBreaks.length; --j >= 0;) {
+          var lineBreak = lineBreaks[j];
+          lineBreak.parentNode.replaceChild(document.createTextNode(ieNewline),
+              lineBreak);
+        }
+      }
+    }
+
+    doWork();
+  }
+
+  window['PR_normalizedHtml'] = normalizedHtml;
+  window['prettyPrintOne'] = prettyPrintOne;
+  window['prettyPrint'] = prettyPrint;
+  window['PR'] = {
+    'combinePrefixPatterns' : combinePrefixPatterns,
+    'createSimpleLexer' : createSimpleLexer,
+    'registerLangHandler' : registerLangHandler,
+    'sourceDecorator' : sourceDecorator,
+    'PR_ATTRIB_NAME' : PR_ATTRIB_NAME,
+    'PR_ATTRIB_VALUE' : PR_ATTRIB_VALUE,
+    'PR_COMMENT' : PR_COMMENT,
+    'PR_DECLARATION' : PR_DECLARATION,
+    'PR_KEYWORD' : PR_KEYWORD,
+    'PR_LITERAL' : PR_LITERAL,
+    'PR_NOCODE' : PR_NOCODE,
+    'PR_PLAIN' : PR_PLAIN,
+    'PR_PUNCTUATION' : PR_PUNCTUATION,
+    'PR_SOURCE' : PR_SOURCE,
+    'PR_STRING' : PR_STRING,
+    'PR_TAG' : PR_TAG,
+    'PR_TYPE' : PR_TYPE
+  };
+})();


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