text: define(function(require, exports, module) {
  (function () {
      var output, Converter;
      if (typeof exports === "object" && typeof require === "function") { // we're in a CommonJS (e.g. Node.js) module
          output = exports;
          Converter = require("./Markdown.Converter").Converter;
      } else {
          output = window.Markdown;
          Converter = output.Converter;
      }
          
      output.getSanitizingConverter = function () {
          var converter = new Converter();
          converter.hooks.chain("postConversion", sanitizeHtml);
          converter.hooks.chain("postConversion", balanceTags);
          return converter;
      }
  
      function sanitizeHtml(html) {
          return html.replace(/<[^>]*>?/gi, sanitizeTag);
      }
  
      // (tags that can be opened/closed) | (tags that stand alone)
      var basic_tag_whitelist = /^(<\/?(b|blockquote|code|del|dd|dl|dt|em|h1|h2|h3|i|kbd|li|ol|p|pre|s|sup|sub|strong|strike|ul)>|<(br|hr)\s?\/?>)$/i;
      // <a href="url..." optional title>|</a>
      var a_white = /^(<a\shref="((https?|ftp):\/\/|\/)[-A-Za-z0-9+&@#\/%?=~_|!:,.;\(\)]+"(\stitle="[^"<>]+")?\s?>|<\/a>)$/i;
  
      // <img src="url..." optional width  optional height  optional alt  optional title
      var img_white = /^(<img\ssrc="(https?:\/\/|\/)[-A-Za-z0-9+&@#\/%?=~_|!:,.;\(\)]+"(\swidth="\d{1,3}")?(\sheight="\d{1,3}")?(\salt="[^"<>]*")?(\stitle="[^"<>]*")?\s?\/?>)$/i;
  
      function sanitizeTag(tag) {
          if (tag.match(basic_tag_whitelist) || tag.match(a_white) || tag.match(img_white))
              return tag;
          else
              return "";
      }
  
      /// <summary>
      /// attempt to balance HTML tags in the html string
      /// by removing any unmatched opening or closing tags
      /// IMPORTANT: we *assume* HTML has *already* been 
      /// sanitized and is safe/sane before balancing!
      /// 
      /// adapted from CODESNIPPET: A8591DBA-D1D3-11DE-947C-BA5556D89593
      /// </summary>
      function balanceTags(html) {
  
          if (html == "")
              return "";
  
          var re = /<\/?\w+[^>]*(\s|$|>)/g;
          // convert everything to lower case; this makes
          // our case insensitive comparisons easier
          var tags = html.toLowerCase().match(re);
  
          // no HTML tags present? nothing to do; exit now
          var tagcount = (tags || []).length;
          if (tagcount == 0)
              return html;
  
          var tagname, tag;
          var ignoredtags = "<p><img><br><li><hr>";
          var match;
          var tagpaired = [];
          var tagremove = [];
          var needsRemoval = false;
  
          // loop through matched tags in forward order
          for (var ctag = 0; ctag < tagcount; ctag++) {
              tagname = tags[ctag].replace(/<\/?(\w+).*/, "$1");
              // skip any already paired tags
              // and skip tags in our ignore list; assume they're self-closed
              if (tagpaired[ctag] || ignoredtags.search("<" + tagname + ">") > -1)
                  continue;
  
              tag = tags[ctag];
              match = -1;
  
              if (!/^<\//.test(tag)) {
                  // this is an opening tag
                  // search forwards (next tags), look for closing tags
                  for (var ntag = ctag + 1; ntag < tagcount; ntag++) {
                      if (!tagpaired[ntag] && tags[ntag] == "</" + tagname + ">") {
                          match = ntag;
                          break;
                      }
                  }
              }
  
              if (match == -1)
                  needsRemoval = tagremove[ctag] = true; // mark for removal
              else
                  tagpaired[match] = true; // mark paired
          }
  
          if (!needsRemoval)
              return html;
  
          // delete all orphaned tags from the string
  
          var ctag = 0;
          html = html.replace(re, function (match) {
              var res = tagremove[ctag] ? "" : match;
              ctag++;
              return res;
          });
          return html;
      }
  })();
  
  });