text: /* ***** BEGIN LICENSE BLOCK *****
   * Distributed under the BSD license:
   *
   * Copyright (c) 2010, Ajax.org B.V.
   * All rights reserved.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in the
   *       documentation and/or other materials provided with the distribution.
   *     * Neither the name of Ajax.org B.V. nor the
   *       names of its contributors may be used to endorse or promote products
   *       derived from this software without specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * ***** END LICENSE BLOCK ***** */
  
  define(function(require, exports, module) {
  "use strict";
  
  var oop = require("../lib/oop");
  var TextHighlightRules = require("./text_highlight_rules").TextHighlightRules;
  var JavaScriptHighlightRules = require("./javascript_highlight_rules").JavaScriptHighlightRules;
  var XmlHighlightRules = require("./xml_highlight_rules").XmlHighlightRules;
  var HtmlHighlightRules = require("./html_highlight_rules").HtmlHighlightRules;
  var CssHighlightRules = require("./css_highlight_rules").CssHighlightRules;
  
  function github_embed(tag, prefix) {
      return { // Github style block
          token : "support.function",
          regex : "^```" + tag + "\\s*$",
          next  : prefix + "start"
      };
  }
  
  var MarkdownHighlightRules = function() {
  
      // regexp must not have capturing parentheses
      // regexps are ordered -> the first match is used
  
      this.$rules = {
          "start" : [ {
              token : "empty_line",
              regex : '^$'
          }, { // code span `
              token : ["support.function", "support.function", "support.function"],
              regex : "(`+)([^\\r]*?[^`])(\\1)"
          }, { // code block
              token : "support.function",
              regex : "^[ ]{4}.+"
          }, { // h1
              token: "markup.heading.1",
              regex: "^=+(?=\\s*$)"
          }, { // h2
              token: "markup.heading.2",
              regex: "^\\-+(?=\\s*$)"
          }, { // header
              token : function(value) {
                  return "markup.heading." + value.search(/[^#]/);
              },
              regex : "^#{1,6}(?:[^ #].*| +.*(?:[^ #].*|[^ ]+.* +#+ *))$"
          }, github_embed("(?:javascript|js)", "js-"),
             github_embed("xml", "xml-"),
             github_embed("html", "html-"),
             github_embed("css", "css-"),
          { // Github style block
              token : "support.function",
              regex : "^```\\s*[a-zA-Z]*(?:{.*?\\})?\\s*$",
              next  : "githubblock"
          }, { // block quote
              token : "string",
              regex : "^>[ ].+$",
              next  : "blockquote"
          }, { // reference
              token : ["text", "constant", "text", "url", "string", "text"],
              regex : "^([ ]{0,3}\\[)([^\\]]+)(\\]:\\s*)([^ ]+)(\\s*(?:[\"][^\"]+[\"])?(\\s*))$"
          }, { // link by reference
              token : ["text", "string", "text", "constant", "text"],
              regex : "(\\[)((?:[[^\\]]*\\]|[^\\[\\]])*)(\\][ ]?(?:\\n[ ]*)?\\[)(.*?)(\\])"
          }, { // link by url
              token : ["text", "string", "text", "markup.underline", "string", "text"],
              regex : "(\\[)"+
                      "(\\[[^\\]]*\\]|[^\\[\\]]*)"+
                      "(\\]\\([ \\t]*)"+
                      "(<?(?:(?:[^\\(]*?\\([^\\)]*?\\)\\S*?)|(?:.*?))>?)"+
                      "((?:[ \t]*\"(?:.*?)\"[ \\t]*)?)"+
                      "(\\))"
          }, { // HR *
              token : "constant",
              regex : "^[ ]{0,2}(?:[ ]?\\*[ ]?){3,}\\s*$"
          }, { // HR -
              token : "constant",
              regex : "^[ ]{0,2}(?:[ ]?\\-[ ]?){3,}\\s*$"
          }, { // HR _
              token : "constant",
              regex : "^[ ]{0,2}(?:[ ]?\\_[ ]?){3,}\\s*$"
          }, { // list
              token : "markup.list",
              regex : "^\\s{0,3}(?:[*+-]|\\d+\\.)\\s+",
              next  : "listblock"
          }, { // strong ** __
              token : ["string", "string", "string"],
              regex : "([*]{2}|[_]{2}(?=\\S))([^\\r]*?\\S[*_]*)(\\1)"
          }, { // emphasis * _
              token : ["string", "string", "string"],
              regex : "([*]|[_](?=\\S))([^\\r]*?\\S[*_]*)(\\1)"
          }, { // 
              token : ["text", "url", "text"],
              regex : "(<)("+
                        "(?:https?|ftp|dict):[^'\">\\s]+"+
                        "|"+
                        "(?:mailto:)?[-.\\w]+\\@[-a-z0-9]+(?:\\.[-a-z0-9]+)*\\.[a-z]+"+
                      ")(>)"
          }, {
              token : "text",
              regex : "[^\\*_%$`\\[#<>]+"
          } ],
          
          "listblock" : [ { // Lists only escape on completely blank lines.
              token : "empty_line",
              regex : "^$",
              next  : "start"
          }, {
              token : "markup.list",
              regex : ".+"
          } ],
          
          "blockquote" : [ { // BLockquotes only escape on blank lines.
              token : "empty_line",
              regex : "^\\s*$",
              next  : "start"
          }, {
              token : "string",
              regex : ".+"
          } ],
          
          "githubblock" : [ {
              token : "support.function",
              regex : "^```",
              next  : "start"
          }, {
              token : "support.function",
              regex : ".+"
          } ]
      };
      
      this.embedRules(JavaScriptHighlightRules, "js-", [{
         token : "support.function",
         regex : "^```",
         next  : "start"
      }]);
      
      this.embedRules(HtmlHighlightRules, "html-", [{
         token : "support.function",
         regex : "^```",
         next  : "start"
      }]);
      
      this.embedRules(CssHighlightRules, "css-", [{
         token : "support.function",
         regex : "^```",
         next  : "start"
      }]);
      
      this.embedRules(XmlHighlightRules, "xml-", [{
         token : "support.function",
         regex : "^```",
         next  : "start"
      }]);
      
      var html = new HtmlHighlightRules().getRules();
      for (var i in html) {
          if (this.$rules[i])
              this.$rules[i] = this.$rules[i].concat(html[i]);
          else
              this.$rules[i] = html[i];
      }
      
  };
  oop.inherits(MarkdownHighlightRules, TextHighlightRules);
  
  exports.MarkdownHighlightRules = MarkdownHighlightRules;
  });
  