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From bri...@apache.org
Subject svn commit: r711160 [2/2] - in /httpd/mod_wombat/trunk: ./ site/ site/css/ site/css/blueprint/ site/css/blueprint/plugins/ site/css/blueprint/plugins/fancy-type/ site/css/blueprint/src/
Date Tue, 04 Nov 2008 03:05:06 GMT
Added: httpd/mod_wombat/trunk/site/prettify.js
URL: http://svn.apache.org/viewvc/httpd/mod_wombat/trunk/site/prettify.js?rev=711160&view=auto
==============================================================================
--- httpd/mod_wombat/trunk/site/prettify.js (added)
+++ httpd/mod_wombat/trunk/site/prettify.js Mon Nov  3 19:05:05 2008
@@ -0,0 +1,1275 @@
+// 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.
+ *
+ * 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 decent subset of Perl, but,
+ * because of commenting conventions, doesn't work on Smalltalk, Lisp-like, or
+ * CAML-like languages.
+ *
+ * If there's a language not mentioned here, then I don't know it, and don't
+ * know whether it works.  If it has a C-like, Bash-like, or XML-like syntax
+ * then it should work passably.
+ *
+ * Usage:
+ * 1) include this source file in an html page via
+ * <script type="text/javascript" src="/path/to/prettify.js"></script>
+ * 2) define style rules.  See the example page for examples.
+ * 3) mark the <pre> and <code> tags in your source with class=prettyprint.
+ *    You can also use the (html deprecated) <xmp> tag, but the pretty printer
+ *    needs to do more substantial DOM manipulations to support that, so some
+ *    css styles may not be preserved.
+ * 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.
+ *
+ * Change log:
+ * cbeust, 2006/08/22
+ *   Java annotations (start with "@") are now captured as literals ("lit")
+ */
+
+// 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.
+ */
+var PR_SHOULD_USE_CONTINUATION = true;
+
+/** the number of characters between tab columns */
+var 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.
+  */
+var PR_normalizedHtml;
+
+/** Contains functions for creating and registering new language handlers.
+  * @type {Object}
+  */
+var PR;
+
+/** Pretty print a chunk of code.
+  *
+  * @param {string} sourceCodeHtml code as html
+  * @return {string} code as html, but prettier
+  */
+var prettyPrintOne;
+/** find all the < pre > and < code > tags in the DOM with class=prettyprint
+  * and prettify them.
+  * @param {Function} opt_whenDone if specified, called when the last entry
+  *     has been finished.
+  */
+var prettyPrint;
+
+/** browser detection. @extern */
+function _pr_isIE6() {
+  var isIE6 = navigator && navigator.userAgent &&
+      /\bMSIE 6\./.test(navigator.userAgent);
+  _pr_isIE6 = function () { return isIE6; };
+  return isIE6;
+}
+
+
+(function () {
+  /** Splits input on space and returns an Object mapping each non-empty part to
+    * true.
+    */
+  function wordSet(words) {
+    words = words.split(/ /g);
+    var set = {};
+    for (var i = words.length; --i >= 0;) {
+      var w = words[i];
+      if (w) { set[w] = null; }
+    }
+    return set;
+  }
+
+  // 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 ";
+  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 typeof using virtual wchar_t where ";
+  var JAVA_KEYWORDS = COMMON_KEYWORDS +
+      "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 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';
+
+  function isWordChar(ch) {
+    return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z');
+  }
+
+  /** Splice one array into another.
+    * Like the python <code>
+    * container[containerPosition:containerPosition + countReplaced] = inserted
+    * </code>
+    * @param {Array} inserted
+    * @param {Array} container modified in place
+    * @param {Number} containerPosition
+    * @param {Number} countReplaced
+    */
+  function spliceArrayInto(
+      inserted, container, containerPosition, countReplaced) {
+    inserted.unshift(containerPosition, countReplaced || 0);
+    try {
+      container.splice.apply(container, inserted);
+    } finally {
+      inserted.splice(0, 2);
+    }
+  }
+
+  /** 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.
+    * @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 = '(?:' +
+          '(?:(?:^|[^0-9.])\\.{1,3})|' +  // a dot that's not part of a number
+          '(?:(?:^|[^\\+])\\+)|' +  // allow + but not ++
+          '(?:(?:^|[^\\-])-)';  // allow - but not --
+      for (var i = 0; i < preceders.length; ++i) {
+        var preceder = preceders[i];
+        if (isWordChar(preceder.charAt(0))) {
+          pattern += '|\\b' + preceder;
+        } else {
+          pattern += '|' + preceder.replace(/([^=<>:&])/g, '\\$1');
+        }
+      }
+      pattern += '|^)\\s*$';  // matches at end, and matches empty string
+      return new RegExp(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_ampEnt, '&')
+        .replace(pr_nbspEnt, ' ');
+  }
+
+  /** is the given node's innerHTML normally unescaped? */
+  function isRawContent(node) {
+    return 'XMP' === node.tagName;
+  }
+
+  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;
+    }
+  }
+
+  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);
+      }
+      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('');
+    };
+  }
+
+  // The below pattern matches one of the following
+  // (1) /[^<]+/ : A run of characters other than '<'
+  // (2) /<!--.*?-->/: an HTML comment
+  // (3) /<!\[CDATA\[.*?\]\]>/: a cdata section
+  // (3) /<\/?[a-zA-Z][^>]*>/ : A probably tag that should not be highlighted
+  // (4) /</ : A '<' that does not begin a larger chunk.  Treated as 1
+  var pr_chunkPattern =
+  /(?:[^<]+|<!--[\s\S]*?-->|<!\[CDATA\[([\s\S]*?)\]\]>|<\/?[a-zA-Z][^>]*>|<)/g;
+  var pr_commentPrefix = /^<!--/;
+  var pr_cdataPrefix = /^<\[CDATA\[/;
+  var pr_brPrefix = /^<br\b/i;
+  var pr_tagNameRe = /^<(\/?)([a-zA-Z]+)/;
+
+  /** 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;
+              end_tag_loop:
+              for (var 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/);
+  }
+
+  /** 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, context : RegExp, shortcut : string].
+    &
+    * Style is a style constant like PR_PLAIN.
+    *
+    * Pattern must only match prefixes, and if it matches a prefix and context
+    * is null or matches the last non-comment token parsed, 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 (string, number?) : Array.<number|string>} a
+    *   function that takes source code and returns a list of decorations.
+    */
+  function createSimpleLexer(shortcutStylePatterns,
+                             fallthroughStylePatterns) {
+    var shortcuts = {};
+    (function () {
+      var allPatterns = shortcutStylePatterns.concat(fallthroughStylePatterns);
+      for (var i = allPatterns.length; --i >= 0;) {
+        var patternParts = allPatterns[i];
+        var shortcutChars = patternParts[3];
+        if (shortcutChars) {
+          for (var c = shortcutChars.length; --c >= 0;) {
+            shortcuts[shortcutChars.charAt(c)] = patternParts;
+          }
+        }
+      }
+    })();
+
+    var nPatterns = fallthroughStylePatterns.length;
+    var notWs = /\S/;
+
+    return function (sourceCode, opt_basePos) {
+      opt_basePos = opt_basePos || 0;
+      var decorations = [opt_basePos, PR_PLAIN];
+      var lastToken = '';
+      var pos = 0;  // index into sourceCode
+      var tail = sourceCode;
+
+      while (tail.length) {
+        var style;
+        var token = null;
+        var match;
+
+        var patternParts = shortcuts[tail.charAt(0)];
+        if (patternParts) {
+          match = tail.match(patternParts[1]);
+          token = match[0];
+          style = patternParts[0];
+        } else {
+          for (var i = 0; i < nPatterns; ++i) {
+            patternParts = fallthroughStylePatterns[i];
+            var contextPattern = patternParts[2];
+            if (contextPattern && !contextPattern.test(lastToken)) {
+              // rule can't be used
+              continue;
+            }
+            match = tail.match(patternParts[1]);
+            if (match) {
+              token = match[0];
+              style = patternParts[0];
+              break;
+            }
+          }
+
+          if (!token) {  // make sure that we make progress
+            style = PR_PLAIN;
+            token = tail.substring(0, 1);
+          }
+        }
+
+        decorations.push(opt_basePos + pos, style);
+        pos += token.length;
+        tail = tail.substring(token.length);
+        if (style !== PR_COMMENT && notWs.test(token)) { lastToken = token; }
+      }
+      return decorations;
+    };
+  }
+
+  var PR_MARKUP_LEXER = createSimpleLexer([], [
+      [PR_PLAIN,       /^[^<]+/, null],
+      [PR_DECLARATION, /^<!\w[^>]*(?:>|$)/, null],
+      [PR_COMMENT,     /^<!--[\s\S]*?(?:-->|$)/, null],
+      [PR_SOURCE,      /^<\?[\s\S]*?(?:\?>|$)/, null],
+      [PR_SOURCE,      /^<%[\s\S]*?(?:%>|$)/, null],
+      [PR_SOURCE,
+       // Tags whose content is not escaped, and which contain source code.
+       /^<(script|style|xmp)\b[^>]*>[\s\S]*?<\/\1\b[^>]*>/i, null],
+      [PR_TAG,         /^<\/?\w[^<>]*>/, null]
+      ]);
+  // Splits any of the source|style|xmp entries above into a start tag,
+  // source content, and end tag.
+  var PR_SOURCE_CHUNK_PARTS = /^(<[^>]*>)([\s\S]*)(<\/[^>]*>)$/;
+  /** split markup on tags, comments, application directives, and other top
+    * level constructs.  Tags are returned as a single token - attributes are
+    * not yet broken out.
+    * @private
+    */
+  function tokenizeMarkup(source) {
+    var decorations = PR_MARKUP_LEXER(source);
+    for (var i = 0; i < decorations.length; i += 2) {
+      if (decorations[i + 1] === PR_SOURCE) {
+        var start, end;
+        start = decorations[i];
+        end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
+        // Split out start and end script tags as actual tags, and leave the
+        // body with style SCRIPT.
+        var sourceChunk = source.substring(start, end);
+        var match = sourceChunk.match(PR_SOURCE_CHUNK_PARTS);
+        if (match) {
+          decorations.splice(
+              i, 2,
+              start, PR_TAG,  // the open chunk
+              start + match[1].length, PR_SOURCE,
+              start + match[1].length + (match[2] || '').length, PR_TAG);
+        }
+      }
+    }
+    return decorations;
+  }
+
+  var PR_TAG_LEXER = createSimpleLexer([
+      [PR_ATTRIB_VALUE, /^\'[^\']*(?:\'|$)/, null, "'"],
+      [PR_ATTRIB_VALUE, /^\"[^\"]*(?:\"|$)/, null, '"'],
+      [PR_PUNCTUATION,  /^[<>\/=]+/, null, '<>/=']
+      ], [
+      [PR_TAG,          /^[\w:\-]+/, /^</],
+      [PR_ATTRIB_VALUE, /^[\w\-]+/, /^=/],
+      [PR_ATTRIB_NAME,  /^[\w:\-]+/, null],
+      [PR_PLAIN,        /^\s+/, null, ' \t\r\n']
+      ]);
+  /** split tags attributes and their values out from the tag name, and
+    * recursively lex source chunks.
+    * @private
+    */
+  function splitTagAttributes(source, decorations) {
+    for (var i = 0; i < decorations.length; i += 2) {
+      var style = decorations[i + 1];
+      if (style === PR_TAG) {
+        var start, end;
+        start = decorations[i];
+        end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
+        var chunk = source.substring(start, end);
+        var subDecorations = PR_TAG_LEXER(chunk, start);
+        spliceArrayInto(subDecorations, decorations, i, 2);
+        i += subDecorations.length - 2;
+      }
+    }
+    return decorations;
+  }
+
+  /** 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 (string) : Array.<string|number>} a
+    *     decorator that takes sourceCode as plain text and that returns a
+    *     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]|\\.)*(?:\"|$))/,
+           null, '"\'']);
+    }
+    fallthroughStylePatterns.push(
+        [PR_PLAIN,   /^(?:[^\'\"\`\/\#]+)/, null, ' \r\n']);
+    if (options.hashComments) {
+      shortcutStylePatterns.push([PR_COMMENT, /^#[^\r\n]*/, null, '#']);
+    }
+    if (options.cStyleComments) {
+      fallthroughStylePatterns.push([PR_COMMENT, /^\/\/[^\r\n]*/, null]);
+      fallthroughStylePatterns.push(
+          [PR_COMMENT, /^\/\*[\s\S]*?(?:\*\/|$)/, 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(
+          [PR_STRING, new RegExp(REGEX_LITERAL), REGEXP_PRECEDER_PATTERN]);
+    }
+
+    var keywords = wordSet(options.keywords);
+
+    options = null;
+
+    /** splits the given string into comment, string, and "other" tokens.
+      * @param {string} sourceCode as plain text
+      * @return {Array.<number|string>} a decoration list.
+      * @private
+      */
+    var splitStringAndCommentTokens = createSimpleLexer(
+        shortcutStylePatterns, fallthroughStylePatterns);
+
+    var styleLiteralIdentifierPuncRecognizer = createSimpleLexer([], [
+        [PR_PLAIN,       /^\s+/, null, ' \r\n'],
+        // TODO(mikesamuel): recognize non-latin letters and numerals in idents
+        [PR_PLAIN,       /^[a-z_$@][a-z_$@0-9]*/i, null],
+        // A hex number
+        [PR_LITERAL,     /^0x[a-f0-9]+[a-z]/i, null],
+        // An octal or decimal number, possibly in scientific notation
+        [PR_LITERAL,
+         /^(?:\d(?:_\d+)*\d*(?:\.\d*)?|\.\d+)(?:e[+\-]?\d+)?[a-z]*/i,
+         null, '123456789'],
+        [PR_PUNCTUATION, /^[^\s\w\.$@]+/, null]
+        // Fallback will handle decimal points not adjacent to a digit
+      ]);
+
+    /** splits plain text tokens into more specific tokens, and then tries to
+      * recognize keywords, and types.
+      * @private
+      */
+    function splitNonStringNonCommentTokens(source, decorations) {
+      for (var i = 0; i < decorations.length; i += 2) {
+        var style = decorations[i + 1];
+        if (style === PR_PLAIN) {
+          var start, end, chunk, subDecs;
+          start = decorations[i];
+          end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
+          chunk = source.substring(start, end);
+          subDecs = styleLiteralIdentifierPuncRecognizer(chunk, start);
+          for (var j = 0, m = subDecs.length; j < m; j += 2) {
+            var subStyle = subDecs[j + 1];
+            if (subStyle === PR_PLAIN) {
+              var subStart = subDecs[j];
+              var subEnd = j + 2 < m ? subDecs[j + 2] : chunk.length;
+              var token = source.substring(subStart, subEnd);
+              if (token === '.') {
+                subDecs[j + 1] = PR_PUNCTUATION;
+              } else if (token in keywords) {
+                subDecs[j + 1] = PR_KEYWORD;
+              } else if (/^@?[A-Z][A-Z$]*[a-z][A-Za-z$]*$/.test(token)) {
+                // classify types and annotations using Java's style conventions
+                subDecs[j + 1] = token.charAt(0) === '@' ? PR_LITERAL : PR_TYPE;
+              }
+            }
+          }
+          spliceArrayInto(subDecs, decorations, i, 2);
+          i += subDecs.length - 2;
+        }
+      }
+      return decorations;
+    }
+
+    return function (sourceCode) {
+      // Split into strings, comments, and other.
+      // We do this because strings and comments are easily recognizable and can
+      // contain stuff that looks like other tokens, so we want to mark those
+      // early so we don't recurse into them.
+      var decorations = splitStringAndCommentTokens(sourceCode);
+
+      // Split non comment|string tokens on whitespace and word boundaries
+      decorations = splitNonStringNonCommentTokens(sourceCode, decorations);
+
+      return decorations;
+    };
+  }
+
+  var decorateSource = sourceDecorator({
+        keywords: ALL_KEYWORDS,
+        hashComments: true,
+        cStyleComments: true,
+        multiLineStrings: true,
+        regexLiterals: true
+      });
+
+  /** identify regions of markup that are really source code, and recursivley
+    * lex them.
+    * @private
+    */
+  function splitSourceNodes(source, decorations) {
+    for (var i = 0; i < decorations.length; i += 2) {
+      var style = decorations[i + 1];
+      if (style === PR_SOURCE) {
+        // Recurse using the non-markup lexer
+        var start, end;
+        start = decorations[i];
+        end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
+        var subDecorations = decorateSource(source.substring(start, end));
+        for (var j = 0, m = subDecorations.length; j < m; j += 2) {
+          subDecorations[j] += start;
+        }
+        spliceArrayInto(subDecorations, decorations, i, 2);
+        i += subDecorations.length - 2;
+      }
+    }
+    return decorations;
+  }
+
+  /** identify attribute values that really contain source code and recursively
+    * lex them.
+    * @private
+    */
+  function splitSourceAttributes(source, decorations) {
+    var nextValueIsSource = false;
+    for (var i = 0; i < decorations.length; i += 2) {
+      var style = decorations[i + 1];
+      var start, end;
+      if (style === PR_ATTRIB_NAME) {
+        start = decorations[i];
+        end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
+        nextValueIsSource = /^on|^style$/i.test(source.substring(start, end));
+      } else if (style === PR_ATTRIB_VALUE) {
+        if (nextValueIsSource) {
+          start = decorations[i];
+          end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
+          var attribValue = source.substring(start, end);
+          var attribLen = attribValue.length;
+          var quoted =
+              (attribLen >= 2 && /^[\"\']/.test(attribValue) &&
+               attribValue.charAt(0) === attribValue.charAt(attribLen - 1));
+
+          var attribSource;
+          var attribSourceStart;
+          var attribSourceEnd;
+          if (quoted) {
+            attribSourceStart = start + 1;
+            attribSourceEnd = end - 1;
+            attribSource = attribValue;
+          } else {
+            attribSourceStart = start + 1;
+            attribSourceEnd = end - 1;
+            attribSource = attribValue.substring(1, attribValue.length - 1);
+          }
+
+          var attribSourceDecorations = decorateSource(attribSource);
+          for (var j = 0, m = attribSourceDecorations.length; j < m; j += 2) {
+            attribSourceDecorations[j] += attribSourceStart;
+          }
+
+          if (quoted) {
+            attribSourceDecorations.push(attribSourceEnd, PR_ATTRIB_VALUE);
+            spliceArrayInto(attribSourceDecorations, decorations, i + 2, 0);
+          } else {
+            spliceArrayInto(attribSourceDecorations, decorations, i, 2);
+          }
+        }
+        nextValueIsSource = false;
+      }
+    }
+    return decorations;
+  }
+
+  /** returns a decoration list given a string of markup.
+    *
+    * This code recognizes a number of constructs.
+    * <!-- ... --> comment
+    * <!\w ... >   declaration
+    * <\w ... >    tag
+    * </\w ... >   tag
+    * <?...?>      embedded source
+    * <%...%>      embedded source
+    * &[#\w]...;   entity
+    *
+    * It does not recognizes %foo; doctype entities from  .
+    *
+    * It will recurse into any <style>, <script>, and on* attributes using
+    * PR_lexSource.
+    */
+  function decorateMarkup(sourceCode) {
+    // This function works as follows:
+    // 1) Start by splitting the markup into text and tag chunks
+    //    Input:  string s
+    //    Output: List<PR_Token> where style in (PR_PLAIN, null)
+    // 2) Then split the text chunks further into comments, declarations,
+    //    tags, etc.
+    //    After each split, consider whether the token is the start of an
+    //    embedded source section, i.e. is an open <script> tag.  If it is, find
+    //    the corresponding close token, and don't bother to lex in between.
+    //    Input:  List<string>
+    //    Output: List<PR_Token> with style in
+    //            (PR_TAG, PR_PLAIN, PR_SOURCE, null)
+    // 3) Finally go over each tag token and split out attribute names and
+    //    values.
+    //    Input:  List<PR_Token>
+    //    Output: List<PR_Token> where style in
+    //            (PR_TAG, PR_PLAIN, PR_SOURCE, NAME, VALUE, null)
+    var decorations = tokenizeMarkup(sourceCode);
+    decorations = splitTagAttributes(sourceCode, decorations);
+    decorations = splitSourceNodes(sourceCode, decorations);
+    decorations = splitSourceAttributes(sourceCode, decorations);
+    return decorations;
+  }
+
+  /**
+    * @param {string} sourceText plain text
+    * @param {Array.<number|string>} extractedTags chunks of raw html preceded
+    *   by their position in sourceText in order.
+    * @param {Array.<number|string>} decorations style classes preceded by their
+    *   position in sourceText in order.
+    * @return {string} html
+    * @private
+    */
+  function recombineTagsAndDecorations(sourceText, extractedTags, 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(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);
+        html.push(htmlChunk.replace(newlineRe, '<br />'));
+        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>');
+    }
+
+    return html.join('');
+  }
+
+  /** Maps language-specific file extensions to handlers. */
+  var langHandlerRegistry = {};
+  /** Register a language handler for the given file extensions.
+    * @param {function (string) : Array.<number|string>} handler
+    *     a function from source code to a list of decorations.
+    * @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.log('cannot override language handler %s', ext);
+      }
+    }
+  }
+  registerLangHandler(decorateSource, ['default-code']);
+  registerLangHandler(decorateMarkup,
+                      ['default-markup', 'html', 'htm', 'xhtml', 'xml', 'xsl']);
+  registerLangHandler(sourceDecorator({
+          keywords: CPP_KEYWORDS,
+          hashComments: true,
+          cStyleComments: true
+        }), ['c', 'cc', 'cpp', 'cs', 'cxx', 'cyc']);
+  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']);
+
+  function prettyPrintOne(sourceCodeHtml, opt_langExtension) {
+    try {
+      // Extract tags, and convert the source code to plain text.
+      var sourceAndExtractedTags = extractTags(sourceCodeHtml);
+      /** Plain text. @type {string} */
+      var source = sourceAndExtractedTags.source;
+
+      /** Even entries are positions in source in ascending order.  Odd entries
+        * are tags that were extracted at that position.
+        * @type {Array.<number|string>}
+        */
+      var extractedTags = sourceAndExtractedTags.tags;
+
+      // Pick a lexer and apply it.
+      if (!langHandlerRegistry.hasOwnProperty(opt_langExtension)) {
+        // Treat it as markup if the first non whitespace character is a < and
+        // the last non-whitespace character is a >.
+        opt_langExtension =
+            /^\s*</.test(source) ? 'default-markup' : 'default-code';
+      }
+
+      /** 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 = langHandlerRegistry[opt_langExtension].call({}, source);
+
+      // Integrate the decorations and tags back into the source code to produce
+      // a decorated html string.
+      return recombineTagsAndDecorations(source, extractedTags, decorations);
+    } catch (e) {
+      if ('console' in window) {
+        console.log(e);
+        console.trace();
+      }
+      return sourceCodeHtml;
+    }
+  }
+
+  function prettyPrint(opt_whenDone) {
+    var isIE6 = _pr_isIE6();
+
+    // 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; j < codeSegments[i].length; ++j) {
+        elements.push(codeSegments[i][j]);
+      }
+    }
+    codeSegments = null;
+
+    // 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;
+
+    function doWork() {
+      var endTime = (PR_SHOULD_USE_CONTINUATION ?
+                     new Date().getTime() + 250 /* ms */ :
+                     Infinity);
+      for (; k < elements.length && new Date().getTime() < 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
+            var newContent = prettyPrintOne(content, langExtension);
+
+            // 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 (isIE6 && cs.tagName === 'PRE') {
+              var lineBreaks = cs.getElementsByTagName('br');
+              for (var j = lineBreaks.length; --j >= 0;) {
+                var lineBreak = lineBreaks[j];
+                lineBreak.parentNode.replaceChild(
+                    document.createTextNode('\r\n'), lineBreak);
+              }
+            }
+          }
+        }
+      }
+      if (k < elements.length) {
+        // finish up in a continuation
+        setTimeout(doWork, 250);
+      } else if (opt_whenDone) {
+        opt_whenDone();
+      }
+    }
+
+    doWork();
+  }
+
+  window['PR_normalizedHtml'] = normalizedHtml;
+  window['prettyPrintOne'] = prettyPrintOne;
+  window['prettyPrint'] = prettyPrint;
+  window['PR'] = {
+        '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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