From 1ec3bd3f8d237c1afb73d4ad1b7a0c24f9a6887c Mon Sep 17 00:00:00 2001
From: Nihad Abbasov <narkoz.2008@gmail.com>
Date: Tue, 7 Aug 2012 06:17:29 -0700
Subject: [PATCH 1/2] ability to preview notes

---
 app/assets/javascripts/application.js         |   24 +-
 app/views/notes/_form.html.haml               |    4 +-
 .../assets/javascripts/Markdown.Converter.js  | 1332 +++++++++++++++++
 3 files changed, 1356 insertions(+), 4 deletions(-)
 create mode 100644 vendor/assets/javascripts/Markdown.Converter.js

diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index 56e26a06f18..be6eb922f53 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -18,6 +18,7 @@
 //= require chosen-jquery
 //= require raphael
 //= require branch-graph
+//= require Markdown.Converter
 //= require_tree .
 
 $(document).ready(function(){
@@ -26,7 +27,6 @@ $(document).ready(function(){
     $(this).select();
   });
 
-
   $('body').on('ajax:complete, ajax:beforeSend, submit', 'form', function(e){
     var buttons = $('[type="submit"]', this);
     switch( e.type ){
@@ -70,6 +70,24 @@ $(document).ready(function(){
   $(".supp_diff_link").bind("click", function() {
     showDiff(this);
   });
+
+  /**
+   * Note markdown preview
+   *
+   */
+  $('#preview-link').on('click', function(e) {
+    var note = $('#note_note').val();
+    if (note.trim().length === 0) { note = 'Nothing to preview'; }
+    var converter = new Markdown.Converter();
+    var md_preview = converter.makeHtml(note);
+    $('#preview-note').html(md_preview);
+
+    var previewLinkText = ($(this).text() == 'Preview' ? 'Edit' : 'Preview');
+    $(this).text(previewLinkText);
+
+    $('#preview-note, #note_note').toggle();
+    e.preventDefault();
+  });
 });
 
 function focusSearch() {
@@ -108,6 +126,6 @@ function showDiff(link) {
 })(jQuery);
 
 
-function ajaxGet(url) { 
-  $.ajax({type: "GET", url: url, dataType: "script"}); 
+function ajaxGet(url) {
+  $.ajax({type: "GET", url: url, dataType: "script"});
 }
diff --git a/app/views/notes/_form.html.haml b/app/views/notes/_form.html.haml
index 55f69f8f97d..a2d33fb5719 100644
--- a/app/views/notes/_form.html.haml
+++ b/app/views/notes/_form.html.haml
@@ -7,10 +7,12 @@
 
   = f.hidden_field :noteable_id
   = f.hidden_field :noteable_type
-  = f.text_area :note,  :size => 255
+  = f.text_area :note, :size => 255
+  #preview-note.well.hide
   %p.hint
     = link_to "Gitlab Markdown", help_markdown_path, :target => '_blank'
     is enabled.
+    = link_to 'Preview', '#', :id => 'preview-link'
 
   .row.note_advanced_opts.hide
     .span4
diff --git a/vendor/assets/javascripts/Markdown.Converter.js b/vendor/assets/javascripts/Markdown.Converter.js
new file mode 100644
index 00000000000..58fc54a1226
--- /dev/null
+++ b/vendor/assets/javascripts/Markdown.Converter.js
@@ -0,0 +1,1332 @@
+var Markdown;
+
+if (typeof exports === "object" && typeof require === "function") // we're in a CommonJS (e.g. Node.js) module
+    Markdown = exports;
+else
+    Markdown = {};
+    
+// The following text is included for historical reasons, but should
+// be taken with a pinch of salt; it's not all true anymore.
+
+//
+// Wherever possible, Showdown is a straight, line-by-line port
+// of the Perl version of Markdown.
+//
+// This is not a normal parser design; it's basically just a
+// series of string substitutions.  It's hard to read and
+// maintain this way,  but keeping Showdown close to the original
+// design makes it easier to port new features.
+//
+// More importantly, Showdown behaves like markdown.pl in most
+// edge cases.  So web applications can do client-side preview
+// in Javascript, and then build identical HTML on the server.
+//
+// This port needs the new RegExp functionality of ECMA 262,
+// 3rd Edition (i.e. Javascript 1.5).  Most modern web browsers
+// should do fine.  Even with the new regular expression features,
+// We do a lot of work to emulate Perl's regex functionality.
+// The tricky changes in this file mostly have the "attacklab:"
+// label.  Major or self-explanatory changes don't.
+//
+// Smart diff tools like Araxis Merge will be able to match up
+// this file with markdown.pl in a useful way.  A little tweaking
+// helps: in a copy of markdown.pl, replace "#" with "//" and
+// replace "$text" with "text".  Be sure to ignore whitespace
+// and line endings.
+//
+
+
+//
+// Usage:
+//
+//   var text = "Markdown *rocks*.";
+//
+//   var converter = new Markdown.Converter();
+//   var html = converter.makeHtml(text);
+//
+//   alert(html);
+//
+// Note: move the sample code to the bottom of this
+// file before uncommenting it.
+//
+
+(function () {
+
+    function identity(x) { return x; }
+    function returnFalse(x) { return false; }
+
+    function HookCollection() { }
+
+    HookCollection.prototype = {
+
+        chain: function (hookname, func) {
+            var original = this[hookname];
+            if (!original)
+                throw new Error("unknown hook " + hookname);
+
+            if (original === identity)
+                this[hookname] = func;
+            else
+                this[hookname] = function (x) { return func(original(x)); }
+        },
+        set: function (hookname, func) {
+            if (!this[hookname])
+                throw new Error("unknown hook " + hookname);
+            this[hookname] = func;
+        },
+        addNoop: function (hookname) {
+            this[hookname] = identity;
+        },
+        addFalse: function (hookname) {
+            this[hookname] = returnFalse;
+        }
+    };
+
+    Markdown.HookCollection = HookCollection;
+
+    // g_urls and g_titles allow arbitrary user-entered strings as keys. This
+    // caused an exception (and hence stopped the rendering) when the user entered
+    // e.g. [push] or [__proto__]. Adding a prefix to the actual key prevents this
+    // (since no builtin property starts with "s_"). See
+    // http://meta.stackoverflow.com/questions/64655/strange-wmd-bug
+    // (granted, switching from Array() to Object() alone would have left only __proto__
+    // to be a problem)
+    function SaveHash() { }
+    SaveHash.prototype = {
+        set: function (key, value) {
+            this["s_" + key] = value;
+        },
+        get: function (key) {
+            return this["s_" + key];
+        }
+    };
+
+    Markdown.Converter = function () {
+        var pluginHooks = this.hooks = new HookCollection();
+        pluginHooks.addNoop("plainLinkText");  // given a URL that was encountered by itself (without markup), should return the link text that's to be given to this link
+        pluginHooks.addNoop("preConversion");  // called with the orignal text as given to makeHtml. The result of this plugin hook is the actual markdown source that will be cooked
+        pluginHooks.addNoop("postConversion"); // called with the final cooked HTML code. The result of this plugin hook is the actual output of makeHtml
+
+        //
+        // Private state of the converter instance:
+        //
+
+        // Global hashes, used by various utility routines
+        var g_urls;
+        var g_titles;
+        var g_html_blocks;
+
+        // Used to track when we're inside an ordered or unordered list
+        // (see _ProcessListItems() for details):
+        var g_list_level;
+
+        this.makeHtml = function (text) {
+
+            //
+            // Main function. The order in which other subs are called here is
+            // essential. Link and image substitutions need to happen before
+            // _EscapeSpecialCharsWithinTagAttributes(), so that any *'s or _'s in the <a>
+            // and <img> tags get encoded.
+            //
+
+            // This will only happen if makeHtml on the same converter instance is called from a plugin hook.
+            // Don't do that.
+            if (g_urls)
+                throw new Error("Recursive call to converter.makeHtml");
+        
+            // Create the private state objects.
+            g_urls = new SaveHash();
+            g_titles = new SaveHash();
+            g_html_blocks = [];
+            g_list_level = 0;
+
+            text = pluginHooks.preConversion(text);
+
+            // attacklab: Replace ~ with ~T
+            // This lets us use tilde as an escape char to avoid md5 hashes
+            // The choice of character is arbitray; anything that isn't
+            // magic in Markdown will work.
+            text = text.replace(/~/g, "~T");
+
+            // attacklab: Replace $ with ~D
+            // RegExp interprets $ as a special character
+            // when it's in a replacement string
+            text = text.replace(/\$/g, "~D");
+
+            // Standardize line endings
+            text = text.replace(/\r\n/g, "\n"); // DOS to Unix
+            text = text.replace(/\r/g, "\n"); // Mac to Unix
+
+            // Make sure text begins and ends with a couple of newlines:
+            text = "\n\n" + text + "\n\n";
+
+            // Convert all tabs to spaces.
+            text = _Detab(text);
+
+            // Strip any lines consisting only of spaces and tabs.
+            // This makes subsequent regexen easier to write, because we can
+            // match consecutive blank lines with /\n+/ instead of something
+            // contorted like /[ \t]*\n+/ .
+            text = text.replace(/^[ \t]+$/mg, "");
+
+            // Turn block-level HTML blocks into hash entries
+            text = _HashHTMLBlocks(text);
+
+            // Strip link definitions, store in hashes.
+            text = _StripLinkDefinitions(text);
+
+            text = _RunBlockGamut(text);
+
+            text = _UnescapeSpecialChars(text);
+
+            // attacklab: Restore dollar signs
+            text = text.replace(/~D/g, "$$");
+
+            // attacklab: Restore tildes
+            text = text.replace(/~T/g, "~");
+
+            text = pluginHooks.postConversion(text);
+
+            g_html_blocks = g_titles = g_urls = null;
+
+            return text;
+        };
+
+        function _StripLinkDefinitions(text) {
+            //
+            // Strips link definitions from text, stores the URLs and titles in
+            // hash references.
+            //
+
+            // Link defs are in the form: ^[id]: url "optional title"
+
+            /*
+            text = text.replace(/
+                ^[ ]{0,3}\[(.+)\]:  // id = $1  attacklab: g_tab_width - 1
+                [ \t]*
+                \n?                 // maybe *one* newline
+                [ \t]*
+                <?(\S+?)>?          // url = $2
+                (?=\s|$)            // lookahead for whitespace instead of the lookbehind removed below
+                [ \t]*
+                \n?                 // maybe one newline
+                [ \t]*
+                (                   // (potential) title = $3
+                    (\n*)           // any lines skipped = $4 attacklab: lookbehind removed
+                    [ \t]+
+                    ["(]
+                    (.+?)           // title = $5
+                    [")]
+                    [ \t]*
+                )?                  // title is optional
+                (?:\n+|$)
+            /gm, function(){...});
+            */
+
+            text = text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?(?=\s|$)[ \t]*\n?[ \t]*((\n*)["(](.+?)[")][ \t]*)?(?:\n+)/gm,
+                function (wholeMatch, m1, m2, m3, m4, m5) {
+                    m1 = m1.toLowerCase();
+                    g_urls.set(m1, _EncodeAmpsAndAngles(m2));  // Link IDs are case-insensitive
+                    if (m4) {
+                        // Oops, found blank lines, so it's not a title.
+                        // Put back the parenthetical statement we stole.
+                        return m3;
+                    } else if (m5) {
+                        g_titles.set(m1, m5.replace(/"/g, "&quot;"));
+                    }
+
+                    // Completely remove the definition from the text
+                    return "";
+                }
+            );
+
+            return text;
+        }
+
+        function _HashHTMLBlocks(text) {
+
+            // Hashify HTML blocks:
+            // We only want to do this for block-level HTML tags, such as headers,
+            // lists, and tables. That's because we still want to wrap <p>s around
+            // "paragraphs" that are wrapped in non-block-level tags, such as anchors,
+            // phrase emphasis, and spans. The list of tags we're looking for is
+            // hard-coded:
+            var block_tags_a = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del"
+            var block_tags_b = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math"
+
+            // First, look for nested blocks, e.g.:
+            //   <div>
+            //     <div>
+            //     tags for inner block must be indented.
+            //     </div>
+            //   </div>
+            //
+            // The outermost tags must start at the left margin for this to match, and
+            // the inner nested divs must be indented.
+            // We need to do this before the next, more liberal match, because the next
+            // match will start at the first `<div>` and stop at the first `</div>`.
+
+            // attacklab: This regex can be expensive when it fails.
+
+            /*
+            text = text.replace(/
+                (                       // save in $1
+                    ^                   // start of line  (with /m)
+                    <($block_tags_a)    // start tag = $2
+                    \b                  // word break
+                                        // attacklab: hack around khtml/pcre bug...
+                    [^\r]*?\n           // any number of lines, minimally matching
+                    </\2>               // the matching end tag
+                    [ \t]*              // trailing spaces/tabs
+                    (?=\n+)             // followed by a newline
+                )                       // attacklab: there are sentinel newlines at end of document
+            /gm,function(){...}};
+            */
+            text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del)\b[^\r]*?\n<\/\2>[ \t]*(?=\n+))/gm, hashElement);
+
+            //
+            // Now match more liberally, simply from `\n<tag>` to `</tag>\n`
+            //
+
+            /*
+            text = text.replace(/
+                (                       // save in $1
+                    ^                   // start of line  (with /m)
+                    <($block_tags_b)    // start tag = $2
+                    \b                  // word break
+                                        // attacklab: hack around khtml/pcre bug...
+                    [^\r]*?             // any number of lines, minimally matching
+                    .*</\2>             // the matching end tag
+                    [ \t]*              // trailing spaces/tabs
+                    (?=\n+)             // followed by a newline
+                )                       // attacklab: there are sentinel newlines at end of document
+            /gm,function(){...}};
+            */
+            text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math)\b[^\r]*?.*<\/\2>[ \t]*(?=\n+)\n)/gm, hashElement);
+
+            // Special case just for <hr />. It was easier to make a special case than
+            // to make the other regex more complicated.  
+
+            /*
+            text = text.replace(/
+                \n                  // Starting after a blank line
+                [ ]{0,3}
+                (                   // save in $1
+                    (<(hr)          // start tag = $2
+                        \b          // word break
+                        ([^<>])*?
+                    \/?>)           // the matching end tag
+                    [ \t]*
+                    (?=\n{2,})      // followed by a blank line
+                )
+            /g,hashElement);
+            */
+            text = text.replace(/\n[ ]{0,3}((<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g, hashElement);
+
+            // Special case for standalone HTML comments:
+
+            /*
+            text = text.replace(/
+                \n\n                                            // Starting after a blank line
+                [ ]{0,3}                                        // attacklab: g_tab_width - 1
+                (                                               // save in $1
+                    <!
+                    (--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)   // see http://www.w3.org/TR/html-markup/syntax.html#comments and http://meta.stackoverflow.com/q/95256
+                    >
+                    [ \t]*
+                    (?=\n{2,})                                  // followed by a blank line
+                )
+            /g,hashElement);
+            */
+            text = text.replace(/\n\n[ ]{0,3}(<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>[ \t]*(?=\n{2,}))/g, hashElement);
+
+            // PHP and ASP-style processor instructions (<?...?> and <%...%>)
+
+            /*
+            text = text.replace(/
+                (?:
+                    \n\n            // Starting after a blank line
+                )
+                (                   // save in $1
+                    [ ]{0,3}        // attacklab: g_tab_width - 1
+                    (?:
+                        <([?%])     // $2
+                        [^\r]*?
+                        \2>
+                    )
+                    [ \t]*
+                    (?=\n{2,})      // followed by a blank line
+                )
+            /g,hashElement);
+            */
+            text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g, hashElement);
+
+            return text;
+        }
+
+        function hashElement(wholeMatch, m1) {
+            var blockText = m1;
+
+            // Undo double lines
+            blockText = blockText.replace(/^\n+/, "");
+
+            // strip trailing blank lines
+            blockText = blockText.replace(/\n+$/g, "");
+
+            // Replace the element text with a marker ("~KxK" where x is its key)
+            blockText = "\n\n~K" + (g_html_blocks.push(blockText) - 1) + "K\n\n";
+
+            return blockText;
+        }
+
+        function _RunBlockGamut(text, doNotUnhash) {
+            //
+            // These are all the transformations that form block-level
+            // tags like paragraphs, headers, and list items.
+            //
+            text = _DoHeaders(text);
+
+            // Do Horizontal Rules:
+            var replacement = "<hr />\n";
+            text = text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm, replacement);
+            text = text.replace(/^[ ]{0,2}([ ]?-[ ]?){3,}[ \t]*$/gm, replacement);
+            text = text.replace(/^[ ]{0,2}([ ]?_[ ]?){3,}[ \t]*$/gm, replacement);
+
+            text = _DoLists(text);
+            text = _DoCodeBlocks(text);
+            text = _DoBlockQuotes(text);
+
+            // We already ran _HashHTMLBlocks() before, in Markdown(), but that
+            // was to escape raw HTML in the original Markdown source. This time,
+            // we're escaping the markup we've just created, so that we don't wrap
+            // <p> tags around block-level tags.
+            text = _HashHTMLBlocks(text);
+            text = _FormParagraphs(text, doNotUnhash);
+
+            return text;
+        }
+
+        function _RunSpanGamut(text) {
+            //
+            // These are all the transformations that occur *within* block-level
+            // tags like paragraphs, headers, and list items.
+            //
+
+            text = _DoCodeSpans(text);
+            text = _EscapeSpecialCharsWithinTagAttributes(text);
+            text = _EncodeBackslashEscapes(text);
+
+            // Process anchor and image tags. Images must come first,
+            // because ![foo][f] looks like an anchor.
+            text = _DoImages(text);
+            text = _DoAnchors(text);
+
+            // Make links out of things like `<http://example.com/>`
+            // Must come after _DoAnchors(), because you can use < and >
+            // delimiters in inline links like [this](<url>).
+            text = _DoAutoLinks(text);
+            
+            text = text.replace(/~P/g, "://"); // put in place to prevent autolinking; reset now
+            
+            text = _EncodeAmpsAndAngles(text);
+            text = _DoItalicsAndBold(text);
+
+            // Do hard breaks:
+            text = text.replace(/  +\n/g, " <br>\n");
+
+            return text;
+        }
+
+        function _EscapeSpecialCharsWithinTagAttributes(text) {
+            //
+            // Within tags -- meaning between < and > -- encode [\ ` * _] so they
+            // don't conflict with their use in Markdown for code, italics and strong.
+            //
+
+            // Build a regex to find HTML tags and comments.  See Friedl's 
+            // "Mastering Regular Expressions", 2nd Ed., pp. 200-201.
+
+            // SE: changed the comment part of the regex
+
+            var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>)/gi;
+
+            text = text.replace(regex, function (wholeMatch) {
+                var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g, "$1`");
+                tag = escapeCharacters(tag, wholeMatch.charAt(1) == "!" ? "\\`*_/" : "\\`*_"); // also escape slashes in comments to prevent autolinking there -- http://meta.stackoverflow.com/questions/95987
+                return tag;
+            });
+
+            return text;
+        }
+
+        function _DoAnchors(text) {
+            //
+            // Turn Markdown link shortcuts into XHTML <a> tags.
+            //
+            //
+            // First, handle reference-style links: [link text] [id]
+            //
+
+            /*
+            text = text.replace(/
+                (                           // wrap whole match in $1
+                    \[
+                    (
+                        (?:
+                            \[[^\]]*\]      // allow brackets nested one level
+                            |
+                            [^\[]           // or anything else
+                        )*
+                    )
+                    \]
+
+                    [ ]?                    // one optional space
+                    (?:\n[ ]*)?             // one optional newline followed by spaces
+
+                    \[
+                    (.*?)                   // id = $3
+                    \]
+                )
+                ()()()()                    // pad remaining backreferences
+            /g, writeAnchorTag);
+            */
+            text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g, writeAnchorTag);
+
+            //
+            // Next, inline-style links: [link text](url "optional title")
+            //
+
+            /*
+            text = text.replace(/
+                (                           // wrap whole match in $1
+                    \[
+                    (
+                        (?:
+                            \[[^\]]*\]      // allow brackets nested one level
+                            |
+                            [^\[\]]         // or anything else
+                        )*
+                    )
+                    \]
+                    \(                      // literal paren
+                    [ \t]*
+                    ()                      // no id, so leave $3 empty
+                    <?(                     // href = $4
+                        (?:
+                            \([^)]*\)       // allow one level of (correctly nested) parens (think MSDN)
+                            |
+                            [^()\s]
+                        )*?
+                    )>?                
+                    [ \t]*
+                    (                       // $5
+                        (['"])              // quote char = $6
+                        (.*?)               // Title = $7
+                        \6                  // matching quote
+                        [ \t]*              // ignore any spaces/tabs between closing quote and )
+                    )?                      // title is optional
+                    \)
+                )
+            /g, writeAnchorTag);
+            */
+
+            text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?((?:\([^)]*\)|[^()\s])*?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g, writeAnchorTag);
+
+            //
+            // Last, handle reference-style shortcuts: [link text]
+            // These must come last in case you've also got [link test][1]
+            // or [link test](/foo)
+            //
+
+            /*
+            text = text.replace(/
+                (                   // wrap whole match in $1
+                    \[
+                    ([^\[\]]+)      // link text = $2; can't contain '[' or ']'
+                    \]
+                )
+                ()()()()()          // pad rest of backreferences
+            /g, writeAnchorTag);
+            */
+            text = text.replace(/(\[([^\[\]]+)\])()()()()()/g, writeAnchorTag);
+
+            return text;
+        }
+
+        function writeAnchorTag(wholeMatch, m1, m2, m3, m4, m5, m6, m7) {
+            if (m7 == undefined) m7 = "";
+            var whole_match = m1;
+            var link_text = m2.replace(/:\/\//g, "~P"); // to prevent auto-linking withing the link. will be converted back after the auto-linker runs
+            var link_id = m3.toLowerCase();
+            var url = m4;
+            var title = m7;
+
+            if (url == "") {
+                if (link_id == "") {
+                    // lower-case and turn embedded newlines into spaces
+                    link_id = link_text.toLowerCase().replace(/ ?\n/g, " ");
+                }
+                url = "#" + link_id;
+
+                if (g_urls.get(link_id) != undefined) {
+                    url = g_urls.get(link_id);
+                    if (g_titles.get(link_id) != undefined) {
+                        title = g_titles.get(link_id);
+                    }
+                }
+                else {
+                    if (whole_match.search(/\(\s*\)$/m) > -1) {
+                        // Special case for explicit empty url
+                        url = "";
+                    } else {
+                        return whole_match;
+                    }
+                }
+            }
+            url = encodeProblemUrlChars(url);
+            url = escapeCharacters(url, "*_");
+            var result = "<a href=\"" + url + "\"";
+
+            if (title != "") {
+                title = attributeEncode(title);
+                title = escapeCharacters(title, "*_");
+                result += " title=\"" + title + "\"";
+            }
+
+            result += ">" + link_text + "</a>";
+
+            return result;
+        }
+
+        function _DoImages(text) {
+            //
+            // Turn Markdown image shortcuts into <img> tags.
+            //
+
+            //
+            // First, handle reference-style labeled images: ![alt text][id]
+            //
+
+            /*
+            text = text.replace(/
+                (                   // wrap whole match in $1
+                    !\[
+                    (.*?)           // alt text = $2
+                    \]
+
+                    [ ]?            // one optional space
+                    (?:\n[ ]*)?     // one optional newline followed by spaces
+
+                    \[
+                    (.*?)           // id = $3
+                    \]
+                )
+                ()()()()            // pad rest of backreferences
+            /g, writeImageTag);
+            */
+            text = text.replace(/(!\[(.*?)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g, writeImageTag);
+
+            //
+            // Next, handle inline images:  ![alt text](url "optional title")
+            // Don't forget: encode * and _
+
+            /*
+            text = text.replace(/
+                (                   // wrap whole match in $1
+                    !\[
+                    (.*?)           // alt text = $2
+                    \]
+                    \s?             // One optional whitespace character
+                    \(              // literal paren
+                    [ \t]*
+                    ()              // no id, so leave $3 empty
+                    <?(\S+?)>?      // src url = $4
+                    [ \t]*
+                    (               // $5
+                        (['"])      // quote char = $6
+                        (.*?)       // title = $7
+                        \6          // matching quote
+                        [ \t]*
+                    )?              // title is optional
+                    \)
+                )
+            /g, writeImageTag);
+            */
+            text = text.replace(/(!\[(.*?)\]\s?\([ \t]*()<?(\S+?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g, writeImageTag);
+
+            return text;
+        }
+        
+        function attributeEncode(text) {
+            // unconditionally replace angle brackets here -- what ends up in an attribute (e.g. alt or title)
+            // never makes sense to have verbatim HTML in it (and the sanitizer would totally break it)
+            return text.replace(/>/g, "&gt;").replace(/</g, "&lt;").replace(/"/g, "&quot;");
+        }
+
+        function writeImageTag(wholeMatch, m1, m2, m3, m4, m5, m6, m7) {
+            var whole_match = m1;
+            var alt_text = m2;
+            var link_id = m3.toLowerCase();
+            var url = m4;
+            var title = m7;
+
+            if (!title) title = "";
+
+            if (url == "") {
+                if (link_id == "") {
+                    // lower-case and turn embedded newlines into spaces
+                    link_id = alt_text.toLowerCase().replace(/ ?\n/g, " ");
+                }
+                url = "#" + link_id;
+
+                if (g_urls.get(link_id) != undefined) {
+                    url = g_urls.get(link_id);
+                    if (g_titles.get(link_id) != undefined) {
+                        title = g_titles.get(link_id);
+                    }
+                }
+                else {
+                    return whole_match;
+                }
+            }
+            
+            alt_text = escapeCharacters(attributeEncode(alt_text), "*_[]()");
+            url = escapeCharacters(url, "*_");
+            var result = "<img src=\"" + url + "\" alt=\"" + alt_text + "\"";
+
+            // attacklab: Markdown.pl adds empty title attributes to images.
+            // Replicate this bug.
+
+            //if (title != "") {
+            title = attributeEncode(title);
+            title = escapeCharacters(title, "*_");
+            result += " title=\"" + title + "\"";
+            //}
+
+            result += " />";
+
+            return result;
+        }
+
+        function _DoHeaders(text) {
+
+            // Setext-style headers:
+            //  Header 1
+            //  ========
+            //  
+            //  Header 2
+            //  --------
+            //
+            text = text.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm,
+                function (wholeMatch, m1) { return "<h1>" + _RunSpanGamut(m1) + "</h1>\n\n"; }
+            );
+
+            text = text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm,
+                function (matchFound, m1) { return "<h2>" + _RunSpanGamut(m1) + "</h2>\n\n"; }
+            );
+
+            // atx-style headers:
+            //  # Header 1
+            //  ## Header 2
+            //  ## Header 2 with closing hashes ##
+            //  ...
+            //  ###### Header 6
+            //
+
+            /*
+            text = text.replace(/
+                ^(\#{1,6})      // $1 = string of #'s
+                [ \t]*
+                (.+?)           // $2 = Header text
+                [ \t]*
+                \#*             // optional closing #'s (not counted)
+                \n+
+            /gm, function() {...});
+            */
+
+            text = text.replace(/^(\#{1,6})[ \t]*(.+?)[ \t]*\#*\n+/gm,
+                function (wholeMatch, m1, m2) {
+                    var h_level = m1.length;
+                    return "<h" + h_level + ">" + _RunSpanGamut(m2) + "</h" + h_level + ">\n\n";
+                }
+            );
+
+            return text;
+        }
+
+        function _DoLists(text) {
+            //
+            // Form HTML ordered (numbered) and unordered (bulleted) lists.
+            //
+
+            // attacklab: add sentinel to hack around khtml/safari bug:
+            // http://bugs.webkit.org/show_bug.cgi?id=11231
+            text += "~0";
+
+            // Re-usable pattern to match any entirel ul or ol list:
+
+            /*
+            var whole_list = /
+                (                                   // $1 = whole list
+                    (                               // $2
+                        [ ]{0,3}                    // attacklab: g_tab_width - 1
+                        ([*+-]|\d+[.])              // $3 = first list item marker
+                        [ \t]+
+                    )
+                    [^\r]+?
+                    (                               // $4
+                        ~0                          // sentinel for workaround; should be $
+                        |
+                        \n{2,}
+                        (?=\S)
+                        (?!                         // Negative lookahead for another list item marker
+                            [ \t]*
+                            (?:[*+-]|\d+[.])[ \t]+
+                        )
+                    )
+                )
+            /g
+            */
+            var whole_list = /^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;
+
+            if (g_list_level) {
+                text = text.replace(whole_list, function (wholeMatch, m1, m2) {
+                    var list = m1;
+                    var list_type = (m2.search(/[*+-]/g) > -1) ? "ul" : "ol";
+
+                    var result = _ProcessListItems(list, list_type);
+
+                    // Trim any trailing whitespace, to put the closing `</$list_type>`
+                    // up on the preceding line, to get it past the current stupid
+                    // HTML block parser. This is a hack to work around the terrible
+                    // hack that is the HTML block parser.
+                    result = result.replace(/\s+$/, "");
+                    result = "<" + list_type + ">" + result + "</" + list_type + ">\n";
+                    return result;
+                });
+            } else {
+                whole_list = /(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g;
+                text = text.replace(whole_list, function (wholeMatch, m1, m2, m3) {
+                    var runup = m1;
+                    var list = m2;
+
+                    var list_type = (m3.search(/[*+-]/g) > -1) ? "ul" : "ol";
+                    var result = _ProcessListItems(list, list_type);
+                    result = runup + "<" + list_type + ">\n" + result + "</" + list_type + ">\n";
+                    return result;
+                });
+            }
+
+            // attacklab: strip sentinel
+            text = text.replace(/~0/, "");
+
+            return text;
+        }
+
+        var _listItemMarkers = { ol: "\\d+[.]", ul: "[*+-]" };
+
+        function _ProcessListItems(list_str, list_type) {
+            //
+            //  Process the contents of a single ordered or unordered list, splitting it
+            //  into individual list items.
+            //
+            //  list_type is either "ul" or "ol".
+
+            // The $g_list_level global keeps track of when we're inside a list.
+            // Each time we enter a list, we increment it; when we leave a list,
+            // we decrement. If it's zero, we're not in a list anymore.
+            //
+            // We do this because when we're not inside a list, we want to treat
+            // something like this:
+            //
+            //    I recommend upgrading to version
+            //    8. Oops, now this line is treated
+            //    as a sub-list.
+            //
+            // As a single paragraph, despite the fact that the second line starts
+            // with a digit-period-space sequence.
+            //
+            // Whereas when we're inside a list (or sub-list), that line will be
+            // treated as the start of a sub-list. What a kludge, huh? This is
+            // an aspect of Markdown's syntax that's hard to parse perfectly
+            // without resorting to mind-reading. Perhaps the solution is to
+            // change the syntax rules such that sub-lists must start with a
+            // starting cardinal number; e.g. "1." or "a.".
+
+            g_list_level++;
+
+            // trim trailing blank lines:
+            list_str = list_str.replace(/\n{2,}$/, "\n");
+
+            // attacklab: add sentinel to emulate \z
+            list_str += "~0";
+
+            // In the original attacklab showdown, list_type was not given to this function, and anything
+            // that matched /[*+-]|\d+[.]/ would just create the next <li>, causing this mismatch:
+            //
+            //  Markdown          rendered by WMD        rendered by MarkdownSharp
+            //  ------------------------------------------------------------------
+            //  1. first          1. first               1. first
+            //  2. second         2. second              2. second
+            //  - third           3. third                   * third
+            //
+            // We changed this to behave identical to MarkdownSharp. This is the constructed RegEx,
+            // with {MARKER} being one of \d+[.] or [*+-], depending on list_type:
+        
+            /*
+            list_str = list_str.replace(/
+                (^[ \t]*)                       // leading whitespace = $1
+                ({MARKER}) [ \t]+               // list marker = $2
+                ([^\r]+?                        // list item text   = $3
+                    (\n+)
+                )
+                (?=
+                    (~0 | \2 ({MARKER}) [ \t]+)
+                )
+            /gm, function(){...});
+            */
+
+            var marker = _listItemMarkers[list_type];
+            var re = new RegExp("(^[ \\t]*)(" + marker + ")[ \\t]+([^\\r]+?(\\n+))(?=(~0|\\1(" + marker + ")[ \\t]+))", "gm");
+            var last_item_had_a_double_newline = false;
+            list_str = list_str.replace(re,
+                function (wholeMatch, m1, m2, m3) {
+                    var item = m3;
+                    var leading_space = m1;
+                    var ends_with_double_newline = /\n\n$/.test(item);
+                    var contains_double_newline = ends_with_double_newline || item.search(/\n{2,}/) > -1;
+
+                    if (contains_double_newline || last_item_had_a_double_newline) {
+                        item = _RunBlockGamut(_Outdent(item), /* doNotUnhash = */true);
+                    }
+                    else {
+                        // Recursion for sub-lists:
+                        item = _DoLists(_Outdent(item));
+                        item = item.replace(/\n$/, ""); // chomp(item)
+                        item = _RunSpanGamut(item);
+                    }
+                    last_item_had_a_double_newline = ends_with_double_newline;
+                    return "<li>" + item + "</li>\n";
+                }
+            );
+
+            // attacklab: strip sentinel
+            list_str = list_str.replace(/~0/g, "");
+
+            g_list_level--;
+            return list_str;
+        }
+
+        function _DoCodeBlocks(text) {
+            //
+            //  Process Markdown `<pre><code>` blocks.
+            //  
+
+            /*
+            text = text.replace(/
+                (?:\n\n|^)
+                (                               // $1 = the code block -- one or more lines, starting with a space/tab
+                    (?:
+                        (?:[ ]{4}|\t)           // Lines must start with a tab or a tab-width of spaces - attacklab: g_tab_width
+                        .*\n+
+                    )+
+                )
+                (\n*[ ]{0,3}[^ \t\n]|(?=~0))    // attacklab: g_tab_width
+            /g ,function(){...});
+            */
+
+            // attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
+            text += "~0";
+
+            text = text.replace(/(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g,
+                function (wholeMatch, m1, m2) {
+                    var codeblock = m1;
+                    var nextChar = m2;
+
+                    codeblock = _EncodeCode(_Outdent(codeblock));
+                    codeblock = _Detab(codeblock);
+                    codeblock = codeblock.replace(/^\n+/g, ""); // trim leading newlines
+                    codeblock = codeblock.replace(/\n+$/g, ""); // trim trailing whitespace
+
+                    codeblock = "<pre><code>" + codeblock + "\n</code></pre>";
+
+                    return "\n\n" + codeblock + "\n\n" + nextChar;
+                }
+            );
+
+            // attacklab: strip sentinel
+            text = text.replace(/~0/, "");
+
+            return text;
+        }
+
+        function hashBlock(text) {
+            text = text.replace(/(^\n+|\n+$)/g, "");
+            return "\n\n~K" + (g_html_blocks.push(text) - 1) + "K\n\n";
+        }
+
+        function _DoCodeSpans(text) {
+            //
+            // * Backtick quotes are used for <code></code> spans.
+            // 
+            // * You can use multiple backticks as the delimiters if you want to
+            //   include literal backticks in the code span. So, this input:
+            //     
+            //      Just type ``foo `bar` baz`` at the prompt.
+            //     
+            //   Will translate to:
+            //     
+            //      <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
+            //     
+            //   There's no arbitrary limit to the number of backticks you
+            //   can use as delimters. If you need three consecutive backticks
+            //   in your code, use four for delimiters, etc.
+            //
+            // * You can use spaces to get literal backticks at the edges:
+            //     
+            //      ... type `` `bar` `` ...
+            //     
+            //   Turns to:
+            //     
+            //      ... type <code>`bar`</code> ...
+            //
+
+            /*
+            text = text.replace(/
+                (^|[^\\])       // Character before opening ` can't be a backslash
+                (`+)            // $2 = Opening run of `
+                (               // $3 = The code block
+                    [^\r]*?
+                    [^`]        // attacklab: work around lack of lookbehind
+                )
+                \2              // Matching closer
+                (?!`)
+            /gm, function(){...});
+            */
+
+            text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,
+                function (wholeMatch, m1, m2, m3, m4) {
+                    var c = m3;
+                    c = c.replace(/^([ \t]*)/g, ""); // leading whitespace
+                    c = c.replace(/[ \t]*$/g, ""); // trailing whitespace
+                    c = _EncodeCode(c);
+                    c = c.replace(/:\/\//g, "~P"); // to prevent auto-linking. Not necessary in code *blocks*, but in code spans. Will be converted back after the auto-linker runs.
+                    return m1 + "<code>" + c + "</code>";
+                }
+            );
+
+            return text;
+        }
+
+        function _EncodeCode(text) {
+            //
+            // Encode/escape certain characters inside Markdown code runs.
+            // The point is that in code, these characters are literals,
+            // and lose their special Markdown meanings.
+            //
+            // Encode all ampersands; HTML entities are not
+            // entities within a Markdown code span.
+            text = text.replace(/&/g, "&amp;");
+
+            // Do the angle bracket song and dance:
+            text = text.replace(/</g, "&lt;");
+            text = text.replace(/>/g, "&gt;");
+
+            // Now, escape characters that are magic in Markdown:
+            text = escapeCharacters(text, "\*_{}[]\\", false);
+
+            // jj the line above breaks this:
+            //---
+
+            //* Item
+
+            //   1. Subitem
+
+            //            special char: *
+            //---
+
+            return text;
+        }
+
+        function _DoItalicsAndBold(text) {
+
+            // <strong> must go first:
+            text = text.replace(/([\W_]|^)(\*\*|__)(?=\S)([^\r]*?\S[\*_]*)\2([\W_]|$)/g,
+            "$1<strong>$3</strong>$4");
+
+            text = text.replace(/([\W_]|^)(\*|_)(?=\S)([^\r\*_]*?\S)\2([\W_]|$)/g,
+            "$1<em>$3</em>$4");
+
+            return text;
+        }
+
+        function _DoBlockQuotes(text) {
+
+            /*
+            text = text.replace(/
+                (                           // Wrap whole match in $1
+                    (
+                        ^[ \t]*>[ \t]?      // '>' at the start of a line
+                        .+\n                // rest of the first line
+                        (.+\n)*             // subsequent consecutive lines
+                        \n*                 // blanks
+                    )+
+                )
+            /gm, function(){...});
+            */
+
+            text = text.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm,
+                function (wholeMatch, m1) {
+                    var bq = m1;
+
+                    // attacklab: hack around Konqueror 3.5.4 bug:
+                    // "----------bug".replace(/^-/g,"") == "bug"
+
+                    bq = bq.replace(/^[ \t]*>[ \t]?/gm, "~0"); // trim one level of quoting
+
+                    // attacklab: clean up hack
+                    bq = bq.replace(/~0/g, "");
+
+                    bq = bq.replace(/^[ \t]+$/gm, "");     // trim whitespace-only lines
+                    bq = _RunBlockGamut(bq);             // recurse
+
+                    bq = bq.replace(/(^|\n)/g, "$1  ");
+                    // These leading spaces screw with <pre> content, so we need to fix that:
+                    bq = bq.replace(
+                            /(\s*<pre>[^\r]+?<\/pre>)/gm,
+                        function (wholeMatch, m1) {
+                            var pre = m1;
+                            // attacklab: hack around Konqueror 3.5.4 bug:
+                            pre = pre.replace(/^  /mg, "~0");
+                            pre = pre.replace(/~0/g, "");
+                            return pre;
+                        });
+
+                    return hashBlock("<blockquote>\n" + bq + "\n</blockquote>");
+                }
+            );
+            return text;
+        }
+
+        function _FormParagraphs(text, doNotUnhash) {
+            //
+            //  Params:
+            //    $text - string to process with html <p> tags
+            //
+
+            // Strip leading and trailing lines:
+            text = text.replace(/^\n+/g, "");
+            text = text.replace(/\n+$/g, "");
+
+            var grafs = text.split(/\n{2,}/g);
+            var grafsOut = [];
+            
+            var markerRe = /~K(\d+)K/;
+
+            //
+            // Wrap <p> tags.
+            //
+            var end = grafs.length;
+            for (var i = 0; i < end; i++) {
+                var str = grafs[i];
+
+                // if this is an HTML marker, copy it
+                if (markerRe.test(str)) {
+                    grafsOut.push(str);
+                }
+                else if (/\S/.test(str)) {
+                    str = _RunSpanGamut(str);
+                    str = str.replace(/^([ \t]*)/g, "<p>");
+                    str += "</p>"
+                    grafsOut.push(str);
+                }
+
+            }
+            //
+            // Unhashify HTML blocks
+            //
+            if (!doNotUnhash) {
+                end = grafsOut.length;
+                for (var i = 0; i < end; i++) {
+                    var foundAny = true;
+                    while (foundAny) { // we may need several runs, since the data may be nested
+                        foundAny = false;
+                        grafsOut[i] = grafsOut[i].replace(/~K(\d+)K/g, function (wholeMatch, id) {
+                            foundAny = true;
+                            return g_html_blocks[id];
+                        });
+                    }
+                }
+            }
+            return grafsOut.join("\n\n");
+        }
+
+        function _EncodeAmpsAndAngles(text) {
+            // Smart processing for ampersands and angle brackets that need to be encoded.
+
+            // Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
+            //   http://bumppo.net/projects/amputator/
+            text = text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g, "&amp;");
+
+            // Encode naked <'s
+            text = text.replace(/<(?![a-z\/?\$!])/gi, "&lt;");
+
+            return text;
+        }
+
+        function _EncodeBackslashEscapes(text) {
+            //
+            //   Parameter:  String.
+            //   Returns:    The string, with after processing the following backslash
+            //               escape sequences.
+            //
+
+            // attacklab: The polite way to do this is with the new
+            // escapeCharacters() function:
+            //
+            //     text = escapeCharacters(text,"\\",true);
+            //     text = escapeCharacters(text,"`*_{}[]()>#+-.!",true);
+            //
+            // ...but we're sidestepping its use of the (slow) RegExp constructor
+            // as an optimization for Firefox.  This function gets called a LOT.
+
+            text = text.replace(/\\(\\)/g, escapeCharacters_callback);
+            text = text.replace(/\\([`*_{}\[\]()>#+-.!])/g, escapeCharacters_callback);
+            return text;
+        }
+
+        function _DoAutoLinks(text) {
+
+            // note that at this point, all other URL in the text are already hyperlinked as <a href=""></a>
+            // *except* for the <http://www.foo.com> case
+
+            // automatically add < and > around unadorned raw hyperlinks
+            // must be preceded by space/BOF and followed by non-word/EOF character    
+            text = text.replace(/(^|\s)(https?|ftp)(:\/\/[-A-Z0-9+&@#\/%?=~_|\[\]\(\)!:,\.;]*[-A-Z0-9+&@#\/%=~_|\[\]])($|\W)/gi, "$1<$2$3>$4");
+
+            //  autolink anything like <http://example.com>
+            
+            var replacer = function (wholematch, m1) { return "<a href=\"" + m1 + "\">" + pluginHooks.plainLinkText(m1) + "</a>"; }
+            text = text.replace(/<((https?|ftp):[^'">\s]+)>/gi, replacer);
+
+            // Email addresses: <address@domain.foo>
+            /*
+            text = text.replace(/
+                <
+                (?:mailto:)?
+                (
+                    [-.\w]+
+                    \@
+                    [-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
+                )
+                >
+            /gi, _DoAutoLinks_callback());
+            */
+
+            /* disabling email autolinking, since we don't do that on the server, either
+            text = text.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,
+                function(wholeMatch,m1) {
+                    return _EncodeEmailAddress( _UnescapeSpecialChars(m1) );
+                }
+            );
+            */
+            return text;
+        }
+
+        function _UnescapeSpecialChars(text) {
+            //
+            // Swap back in all the special characters we've hidden.
+            //
+            text = text.replace(/~E(\d+)E/g,
+                function (wholeMatch, m1) {
+                    var charCodeToReplace = parseInt(m1);
+                    return String.fromCharCode(charCodeToReplace);
+                }
+            );
+            return text;
+        }
+
+        function _Outdent(text) {
+            //
+            // Remove one level of line-leading tabs or spaces
+            //
+
+            // attacklab: hack around Konqueror 3.5.4 bug:
+            // "----------bug".replace(/^-/g,"") == "bug"
+
+            text = text.replace(/^(\t|[ ]{1,4})/gm, "~0"); // attacklab: g_tab_width
+
+            // attacklab: clean up hack
+            text = text.replace(/~0/g, "")
+
+            return text;
+        }
+
+        function _Detab(text) {
+            if (!/\t/.test(text))
+                return text;
+
+            var spaces = ["    ", "   ", "  ", " "],
+            skew = 0,
+            v;
+
+            return text.replace(/[\n\t]/g, function (match, offset) {
+                if (match === "\n") {
+                    skew = offset + 1;
+                    return match;
+                }
+                v = (offset - skew) % 4;
+                skew = offset + 1;
+                return spaces[v];
+            });
+        }
+
+        //
+        //  attacklab: Utility functions
+        //
+
+        var _problemUrlChars = /(?:["'*()[\]:]|~D)/g;
+
+        // hex-encodes some unusual "problem" chars in URLs to avoid URL detection problems 
+        function encodeProblemUrlChars(url) {
+            if (!url)
+                return "";
+
+            var len = url.length;
+
+            return url.replace(_problemUrlChars, function (match, offset) {
+                if (match == "~D") // escape for dollar
+                    return "%24";
+                if (match == ":") {
+                    if (offset == len - 1 || /[0-9\/]/.test(url.charAt(offset + 1)))
+                        return ":"
+                }
+                return "%" + match.charCodeAt(0).toString(16);
+            });
+        }
+
+
+        function escapeCharacters(text, charsToEscape, afterBackslash) {
+            // First we have to escape the escape characters so that
+            // we can build a character class out of them
+            var regexString = "([" + charsToEscape.replace(/([\[\]\\])/g, "\\$1") + "])";
+
+            if (afterBackslash) {
+                regexString = "\\\\" + regexString;
+            }
+
+            var regex = new RegExp(regexString, "g");
+            text = text.replace(regex, escapeCharacters_callback);
+
+            return text;
+        }
+
+
+        function escapeCharacters_callback(wholeMatch, m1) {
+            var charCodeToEscape = m1.charCodeAt(0);
+            return "~E" + charCodeToEscape + "E";
+        }
+
+    }; // end of the Markdown.Converter constructor
+
+})();

From 9639780359f16d784f22af2a1dbbcd8322ffd6c3 Mon Sep 17 00:00:00 2001
From: Nihad Abbasov <narkoz.2008@gmail.com>
Date: Wed, 8 Aug 2012 02:25:24 -0700
Subject: [PATCH 2/2] render notes preview on server-side

---
 app/assets/javascripts/application.js         |   13 +-
 app/controllers/notes_controller.rb           |    6 +-
 app/views/notes/_form.html.haml               |    2 +-
 config/routes.rb                              |    6 +-
 .../assets/javascripts/Markdown.Converter.js  | 1332 -----------------
 5 files changed, 18 insertions(+), 1341 deletions(-)
 delete mode 100644 vendor/assets/javascripts/Markdown.Converter.js

diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index be6eb922f53..25732ae5289 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -18,7 +18,6 @@
 //= require chosen-jquery
 //= require raphael
 //= require branch-graph
-//= require Markdown.Converter
 //= require_tree .
 
 $(document).ready(function(){
@@ -76,15 +75,17 @@ $(document).ready(function(){
    *
    */
   $('#preview-link').on('click', function(e) {
-    var note = $('#note_note').val();
-    if (note.trim().length === 0) { note = 'Nothing to preview'; }
-    var converter = new Markdown.Converter();
-    var md_preview = converter.makeHtml(note);
-    $('#preview-note').html(md_preview);
+    $('#preview-note').text('Loading...');
 
     var previewLinkText = ($(this).text() == 'Preview' ? 'Edit' : 'Preview');
     $(this).text(previewLinkText);
 
+    var note = $('#note_note').val();
+    if (note.trim().length === 0) { note = 'Nothing to preview'; }
+    $.post($(this).attr('href'), {note: note}, function(data) {
+      $('#preview-note').html(data);
+    });
+
     $('#preview-note, #note_note').toggle();
     e.preventDefault();
   });
diff --git a/app/controllers/notes_controller.rb b/app/controllers/notes_controller.rb
index e8e4bb544a8..8fac6428a58 100644
--- a/app/controllers/notes_controller.rb
+++ b/app/controllers/notes_controller.rb
@@ -33,7 +33,11 @@ class NotesController < ApplicationController
     end
   end
 
-  protected 
+  def preview
+    render :text => view_context.markdown(params[:note])
+  end
+
+  protected
 
   def notes
     @notes = Notes::LoadContext.new(project, current_user, params).execute
diff --git a/app/views/notes/_form.html.haml b/app/views/notes/_form.html.haml
index a2d33fb5719..3291772890c 100644
--- a/app/views/notes/_form.html.haml
+++ b/app/views/notes/_form.html.haml
@@ -12,7 +12,7 @@
   %p.hint
     = link_to "Gitlab Markdown", help_markdown_path, :target => '_blank'
     is enabled.
-    = link_to 'Preview', '#', :id => 'preview-link'
+    = link_to 'Preview', preview_project_notes_path(@project), :id => 'preview-link'
 
   .row.note_advanced_opts.hide
     .span4
diff --git a/config/routes.rb b/config/routes.rb
index 11430baf30e..94cc523e566 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -199,7 +199,11 @@ Gitlab::Application.routes.draw do
         get   :search
       end
     end
-    resources :notes, :only => [:index, :create, :destroy]
+    resources :notes, :only => [:index, :create, :destroy] do
+      collection do
+        post :preview
+      end
+    end
   end
   root :to => "dashboard#index"
 end
diff --git a/vendor/assets/javascripts/Markdown.Converter.js b/vendor/assets/javascripts/Markdown.Converter.js
deleted file mode 100644
index 58fc54a1226..00000000000
--- a/vendor/assets/javascripts/Markdown.Converter.js
+++ /dev/null
@@ -1,1332 +0,0 @@
-var Markdown;
-
-if (typeof exports === "object" && typeof require === "function") // we're in a CommonJS (e.g. Node.js) module
-    Markdown = exports;
-else
-    Markdown = {};
-    
-// The following text is included for historical reasons, but should
-// be taken with a pinch of salt; it's not all true anymore.
-
-//
-// Wherever possible, Showdown is a straight, line-by-line port
-// of the Perl version of Markdown.
-//
-// This is not a normal parser design; it's basically just a
-// series of string substitutions.  It's hard to read and
-// maintain this way,  but keeping Showdown close to the original
-// design makes it easier to port new features.
-//
-// More importantly, Showdown behaves like markdown.pl in most
-// edge cases.  So web applications can do client-side preview
-// in Javascript, and then build identical HTML on the server.
-//
-// This port needs the new RegExp functionality of ECMA 262,
-// 3rd Edition (i.e. Javascript 1.5).  Most modern web browsers
-// should do fine.  Even with the new regular expression features,
-// We do a lot of work to emulate Perl's regex functionality.
-// The tricky changes in this file mostly have the "attacklab:"
-// label.  Major or self-explanatory changes don't.
-//
-// Smart diff tools like Araxis Merge will be able to match up
-// this file with markdown.pl in a useful way.  A little tweaking
-// helps: in a copy of markdown.pl, replace "#" with "//" and
-// replace "$text" with "text".  Be sure to ignore whitespace
-// and line endings.
-//
-
-
-//
-// Usage:
-//
-//   var text = "Markdown *rocks*.";
-//
-//   var converter = new Markdown.Converter();
-//   var html = converter.makeHtml(text);
-//
-//   alert(html);
-//
-// Note: move the sample code to the bottom of this
-// file before uncommenting it.
-//
-
-(function () {
-
-    function identity(x) { return x; }
-    function returnFalse(x) { return false; }
-
-    function HookCollection() { }
-
-    HookCollection.prototype = {
-
-        chain: function (hookname, func) {
-            var original = this[hookname];
-            if (!original)
-                throw new Error("unknown hook " + hookname);
-
-            if (original === identity)
-                this[hookname] = func;
-            else
-                this[hookname] = function (x) { return func(original(x)); }
-        },
-        set: function (hookname, func) {
-            if (!this[hookname])
-                throw new Error("unknown hook " + hookname);
-            this[hookname] = func;
-        },
-        addNoop: function (hookname) {
-            this[hookname] = identity;
-        },
-        addFalse: function (hookname) {
-            this[hookname] = returnFalse;
-        }
-    };
-
-    Markdown.HookCollection = HookCollection;
-
-    // g_urls and g_titles allow arbitrary user-entered strings as keys. This
-    // caused an exception (and hence stopped the rendering) when the user entered
-    // e.g. [push] or [__proto__]. Adding a prefix to the actual key prevents this
-    // (since no builtin property starts with "s_"). See
-    // http://meta.stackoverflow.com/questions/64655/strange-wmd-bug
-    // (granted, switching from Array() to Object() alone would have left only __proto__
-    // to be a problem)
-    function SaveHash() { }
-    SaveHash.prototype = {
-        set: function (key, value) {
-            this["s_" + key] = value;
-        },
-        get: function (key) {
-            return this["s_" + key];
-        }
-    };
-
-    Markdown.Converter = function () {
-        var pluginHooks = this.hooks = new HookCollection();
-        pluginHooks.addNoop("plainLinkText");  // given a URL that was encountered by itself (without markup), should return the link text that's to be given to this link
-        pluginHooks.addNoop("preConversion");  // called with the orignal text as given to makeHtml. The result of this plugin hook is the actual markdown source that will be cooked
-        pluginHooks.addNoop("postConversion"); // called with the final cooked HTML code. The result of this plugin hook is the actual output of makeHtml
-
-        //
-        // Private state of the converter instance:
-        //
-
-        // Global hashes, used by various utility routines
-        var g_urls;
-        var g_titles;
-        var g_html_blocks;
-
-        // Used to track when we're inside an ordered or unordered list
-        // (see _ProcessListItems() for details):
-        var g_list_level;
-
-        this.makeHtml = function (text) {
-
-            //
-            // Main function. The order in which other subs are called here is
-            // essential. Link and image substitutions need to happen before
-            // _EscapeSpecialCharsWithinTagAttributes(), so that any *'s or _'s in the <a>
-            // and <img> tags get encoded.
-            //
-
-            // This will only happen if makeHtml on the same converter instance is called from a plugin hook.
-            // Don't do that.
-            if (g_urls)
-                throw new Error("Recursive call to converter.makeHtml");
-        
-            // Create the private state objects.
-            g_urls = new SaveHash();
-            g_titles = new SaveHash();
-            g_html_blocks = [];
-            g_list_level = 0;
-
-            text = pluginHooks.preConversion(text);
-
-            // attacklab: Replace ~ with ~T
-            // This lets us use tilde as an escape char to avoid md5 hashes
-            // The choice of character is arbitray; anything that isn't
-            // magic in Markdown will work.
-            text = text.replace(/~/g, "~T");
-
-            // attacklab: Replace $ with ~D
-            // RegExp interprets $ as a special character
-            // when it's in a replacement string
-            text = text.replace(/\$/g, "~D");
-
-            // Standardize line endings
-            text = text.replace(/\r\n/g, "\n"); // DOS to Unix
-            text = text.replace(/\r/g, "\n"); // Mac to Unix
-
-            // Make sure text begins and ends with a couple of newlines:
-            text = "\n\n" + text + "\n\n";
-
-            // Convert all tabs to spaces.
-            text = _Detab(text);
-
-            // Strip any lines consisting only of spaces and tabs.
-            // This makes subsequent regexen easier to write, because we can
-            // match consecutive blank lines with /\n+/ instead of something
-            // contorted like /[ \t]*\n+/ .
-            text = text.replace(/^[ \t]+$/mg, "");
-
-            // Turn block-level HTML blocks into hash entries
-            text = _HashHTMLBlocks(text);
-
-            // Strip link definitions, store in hashes.
-            text = _StripLinkDefinitions(text);
-
-            text = _RunBlockGamut(text);
-
-            text = _UnescapeSpecialChars(text);
-
-            // attacklab: Restore dollar signs
-            text = text.replace(/~D/g, "$$");
-
-            // attacklab: Restore tildes
-            text = text.replace(/~T/g, "~");
-
-            text = pluginHooks.postConversion(text);
-
-            g_html_blocks = g_titles = g_urls = null;
-
-            return text;
-        };
-
-        function _StripLinkDefinitions(text) {
-            //
-            // Strips link definitions from text, stores the URLs and titles in
-            // hash references.
-            //
-
-            // Link defs are in the form: ^[id]: url "optional title"
-
-            /*
-            text = text.replace(/
-                ^[ ]{0,3}\[(.+)\]:  // id = $1  attacklab: g_tab_width - 1
-                [ \t]*
-                \n?                 // maybe *one* newline
-                [ \t]*
-                <?(\S+?)>?          // url = $2
-                (?=\s|$)            // lookahead for whitespace instead of the lookbehind removed below
-                [ \t]*
-                \n?                 // maybe one newline
-                [ \t]*
-                (                   // (potential) title = $3
-                    (\n*)           // any lines skipped = $4 attacklab: lookbehind removed
-                    [ \t]+
-                    ["(]
-                    (.+?)           // title = $5
-                    [")]
-                    [ \t]*
-                )?                  // title is optional
-                (?:\n+|$)
-            /gm, function(){...});
-            */
-
-            text = text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?(?=\s|$)[ \t]*\n?[ \t]*((\n*)["(](.+?)[")][ \t]*)?(?:\n+)/gm,
-                function (wholeMatch, m1, m2, m3, m4, m5) {
-                    m1 = m1.toLowerCase();
-                    g_urls.set(m1, _EncodeAmpsAndAngles(m2));  // Link IDs are case-insensitive
-                    if (m4) {
-                        // Oops, found blank lines, so it's not a title.
-                        // Put back the parenthetical statement we stole.
-                        return m3;
-                    } else if (m5) {
-                        g_titles.set(m1, m5.replace(/"/g, "&quot;"));
-                    }
-
-                    // Completely remove the definition from the text
-                    return "";
-                }
-            );
-
-            return text;
-        }
-
-        function _HashHTMLBlocks(text) {
-
-            // Hashify HTML blocks:
-            // We only want to do this for block-level HTML tags, such as headers,
-            // lists, and tables. That's because we still want to wrap <p>s around
-            // "paragraphs" that are wrapped in non-block-level tags, such as anchors,
-            // phrase emphasis, and spans. The list of tags we're looking for is
-            // hard-coded:
-            var block_tags_a = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del"
-            var block_tags_b = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math"
-
-            // First, look for nested blocks, e.g.:
-            //   <div>
-            //     <div>
-            //     tags for inner block must be indented.
-            //     </div>
-            //   </div>
-            //
-            // The outermost tags must start at the left margin for this to match, and
-            // the inner nested divs must be indented.
-            // We need to do this before the next, more liberal match, because the next
-            // match will start at the first `<div>` and stop at the first `</div>`.
-
-            // attacklab: This regex can be expensive when it fails.
-
-            /*
-            text = text.replace(/
-                (                       // save in $1
-                    ^                   // start of line  (with /m)
-                    <($block_tags_a)    // start tag = $2
-                    \b                  // word break
-                                        // attacklab: hack around khtml/pcre bug...
-                    [^\r]*?\n           // any number of lines, minimally matching
-                    </\2>               // the matching end tag
-                    [ \t]*              // trailing spaces/tabs
-                    (?=\n+)             // followed by a newline
-                )                       // attacklab: there are sentinel newlines at end of document
-            /gm,function(){...}};
-            */
-            text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del)\b[^\r]*?\n<\/\2>[ \t]*(?=\n+))/gm, hashElement);
-
-            //
-            // Now match more liberally, simply from `\n<tag>` to `</tag>\n`
-            //
-
-            /*
-            text = text.replace(/
-                (                       // save in $1
-                    ^                   // start of line  (with /m)
-                    <($block_tags_b)    // start tag = $2
-                    \b                  // word break
-                                        // attacklab: hack around khtml/pcre bug...
-                    [^\r]*?             // any number of lines, minimally matching
-                    .*</\2>             // the matching end tag
-                    [ \t]*              // trailing spaces/tabs
-                    (?=\n+)             // followed by a newline
-                )                       // attacklab: there are sentinel newlines at end of document
-            /gm,function(){...}};
-            */
-            text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math)\b[^\r]*?.*<\/\2>[ \t]*(?=\n+)\n)/gm, hashElement);
-
-            // Special case just for <hr />. It was easier to make a special case than
-            // to make the other regex more complicated.  
-
-            /*
-            text = text.replace(/
-                \n                  // Starting after a blank line
-                [ ]{0,3}
-                (                   // save in $1
-                    (<(hr)          // start tag = $2
-                        \b          // word break
-                        ([^<>])*?
-                    \/?>)           // the matching end tag
-                    [ \t]*
-                    (?=\n{2,})      // followed by a blank line
-                )
-            /g,hashElement);
-            */
-            text = text.replace(/\n[ ]{0,3}((<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g, hashElement);
-
-            // Special case for standalone HTML comments:
-
-            /*
-            text = text.replace(/
-                \n\n                                            // Starting after a blank line
-                [ ]{0,3}                                        // attacklab: g_tab_width - 1
-                (                                               // save in $1
-                    <!
-                    (--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)   // see http://www.w3.org/TR/html-markup/syntax.html#comments and http://meta.stackoverflow.com/q/95256
-                    >
-                    [ \t]*
-                    (?=\n{2,})                                  // followed by a blank line
-                )
-            /g,hashElement);
-            */
-            text = text.replace(/\n\n[ ]{0,3}(<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>[ \t]*(?=\n{2,}))/g, hashElement);
-
-            // PHP and ASP-style processor instructions (<?...?> and <%...%>)
-
-            /*
-            text = text.replace(/
-                (?:
-                    \n\n            // Starting after a blank line
-                )
-                (                   // save in $1
-                    [ ]{0,3}        // attacklab: g_tab_width - 1
-                    (?:
-                        <([?%])     // $2
-                        [^\r]*?
-                        \2>
-                    )
-                    [ \t]*
-                    (?=\n{2,})      // followed by a blank line
-                )
-            /g,hashElement);
-            */
-            text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g, hashElement);
-
-            return text;
-        }
-
-        function hashElement(wholeMatch, m1) {
-            var blockText = m1;
-
-            // Undo double lines
-            blockText = blockText.replace(/^\n+/, "");
-
-            // strip trailing blank lines
-            blockText = blockText.replace(/\n+$/g, "");
-
-            // Replace the element text with a marker ("~KxK" where x is its key)
-            blockText = "\n\n~K" + (g_html_blocks.push(blockText) - 1) + "K\n\n";
-
-            return blockText;
-        }
-
-        function _RunBlockGamut(text, doNotUnhash) {
-            //
-            // These are all the transformations that form block-level
-            // tags like paragraphs, headers, and list items.
-            //
-            text = _DoHeaders(text);
-
-            // Do Horizontal Rules:
-            var replacement = "<hr />\n";
-            text = text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm, replacement);
-            text = text.replace(/^[ ]{0,2}([ ]?-[ ]?){3,}[ \t]*$/gm, replacement);
-            text = text.replace(/^[ ]{0,2}([ ]?_[ ]?){3,}[ \t]*$/gm, replacement);
-
-            text = _DoLists(text);
-            text = _DoCodeBlocks(text);
-            text = _DoBlockQuotes(text);
-
-            // We already ran _HashHTMLBlocks() before, in Markdown(), but that
-            // was to escape raw HTML in the original Markdown source. This time,
-            // we're escaping the markup we've just created, so that we don't wrap
-            // <p> tags around block-level tags.
-            text = _HashHTMLBlocks(text);
-            text = _FormParagraphs(text, doNotUnhash);
-
-            return text;
-        }
-
-        function _RunSpanGamut(text) {
-            //
-            // These are all the transformations that occur *within* block-level
-            // tags like paragraphs, headers, and list items.
-            //
-
-            text = _DoCodeSpans(text);
-            text = _EscapeSpecialCharsWithinTagAttributes(text);
-            text = _EncodeBackslashEscapes(text);
-
-            // Process anchor and image tags. Images must come first,
-            // because ![foo][f] looks like an anchor.
-            text = _DoImages(text);
-            text = _DoAnchors(text);
-
-            // Make links out of things like `<http://example.com/>`
-            // Must come after _DoAnchors(), because you can use < and >
-            // delimiters in inline links like [this](<url>).
-            text = _DoAutoLinks(text);
-            
-            text = text.replace(/~P/g, "://"); // put in place to prevent autolinking; reset now
-            
-            text = _EncodeAmpsAndAngles(text);
-            text = _DoItalicsAndBold(text);
-
-            // Do hard breaks:
-            text = text.replace(/  +\n/g, " <br>\n");
-
-            return text;
-        }
-
-        function _EscapeSpecialCharsWithinTagAttributes(text) {
-            //
-            // Within tags -- meaning between < and > -- encode [\ ` * _] so they
-            // don't conflict with their use in Markdown for code, italics and strong.
-            //
-
-            // Build a regex to find HTML tags and comments.  See Friedl's 
-            // "Mastering Regular Expressions", 2nd Ed., pp. 200-201.
-
-            // SE: changed the comment part of the regex
-
-            var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>)/gi;
-
-            text = text.replace(regex, function (wholeMatch) {
-                var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g, "$1`");
-                tag = escapeCharacters(tag, wholeMatch.charAt(1) == "!" ? "\\`*_/" : "\\`*_"); // also escape slashes in comments to prevent autolinking there -- http://meta.stackoverflow.com/questions/95987
-                return tag;
-            });
-
-            return text;
-        }
-
-        function _DoAnchors(text) {
-            //
-            // Turn Markdown link shortcuts into XHTML <a> tags.
-            //
-            //
-            // First, handle reference-style links: [link text] [id]
-            //
-
-            /*
-            text = text.replace(/
-                (                           // wrap whole match in $1
-                    \[
-                    (
-                        (?:
-                            \[[^\]]*\]      // allow brackets nested one level
-                            |
-                            [^\[]           // or anything else
-                        )*
-                    )
-                    \]
-
-                    [ ]?                    // one optional space
-                    (?:\n[ ]*)?             // one optional newline followed by spaces
-
-                    \[
-                    (.*?)                   // id = $3
-                    \]
-                )
-                ()()()()                    // pad remaining backreferences
-            /g, writeAnchorTag);
-            */
-            text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g, writeAnchorTag);
-
-            //
-            // Next, inline-style links: [link text](url "optional title")
-            //
-
-            /*
-            text = text.replace(/
-                (                           // wrap whole match in $1
-                    \[
-                    (
-                        (?:
-                            \[[^\]]*\]      // allow brackets nested one level
-                            |
-                            [^\[\]]         // or anything else
-                        )*
-                    )
-                    \]
-                    \(                      // literal paren
-                    [ \t]*
-                    ()                      // no id, so leave $3 empty
-                    <?(                     // href = $4
-                        (?:
-                            \([^)]*\)       // allow one level of (correctly nested) parens (think MSDN)
-                            |
-                            [^()\s]
-                        )*?
-                    )>?                
-                    [ \t]*
-                    (                       // $5
-                        (['"])              // quote char = $6
-                        (.*?)               // Title = $7
-                        \6                  // matching quote
-                        [ \t]*              // ignore any spaces/tabs between closing quote and )
-                    )?                      // title is optional
-                    \)
-                )
-            /g, writeAnchorTag);
-            */
-
-            text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?((?:\([^)]*\)|[^()\s])*?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g, writeAnchorTag);
-
-            //
-            // Last, handle reference-style shortcuts: [link text]
-            // These must come last in case you've also got [link test][1]
-            // or [link test](/foo)
-            //
-
-            /*
-            text = text.replace(/
-                (                   // wrap whole match in $1
-                    \[
-                    ([^\[\]]+)      // link text = $2; can't contain '[' or ']'
-                    \]
-                )
-                ()()()()()          // pad rest of backreferences
-            /g, writeAnchorTag);
-            */
-            text = text.replace(/(\[([^\[\]]+)\])()()()()()/g, writeAnchorTag);
-
-            return text;
-        }
-
-        function writeAnchorTag(wholeMatch, m1, m2, m3, m4, m5, m6, m7) {
-            if (m7 == undefined) m7 = "";
-            var whole_match = m1;
-            var link_text = m2.replace(/:\/\//g, "~P"); // to prevent auto-linking withing the link. will be converted back after the auto-linker runs
-            var link_id = m3.toLowerCase();
-            var url = m4;
-            var title = m7;
-
-            if (url == "") {
-                if (link_id == "") {
-                    // lower-case and turn embedded newlines into spaces
-                    link_id = link_text.toLowerCase().replace(/ ?\n/g, " ");
-                }
-                url = "#" + link_id;
-
-                if (g_urls.get(link_id) != undefined) {
-                    url = g_urls.get(link_id);
-                    if (g_titles.get(link_id) != undefined) {
-                        title = g_titles.get(link_id);
-                    }
-                }
-                else {
-                    if (whole_match.search(/\(\s*\)$/m) > -1) {
-                        // Special case for explicit empty url
-                        url = "";
-                    } else {
-                        return whole_match;
-                    }
-                }
-            }
-            url = encodeProblemUrlChars(url);
-            url = escapeCharacters(url, "*_");
-            var result = "<a href=\"" + url + "\"";
-
-            if (title != "") {
-                title = attributeEncode(title);
-                title = escapeCharacters(title, "*_");
-                result += " title=\"" + title + "\"";
-            }
-
-            result += ">" + link_text + "</a>";
-
-            return result;
-        }
-
-        function _DoImages(text) {
-            //
-            // Turn Markdown image shortcuts into <img> tags.
-            //
-
-            //
-            // First, handle reference-style labeled images: ![alt text][id]
-            //
-
-            /*
-            text = text.replace(/
-                (                   // wrap whole match in $1
-                    !\[
-                    (.*?)           // alt text = $2
-                    \]
-
-                    [ ]?            // one optional space
-                    (?:\n[ ]*)?     // one optional newline followed by spaces
-
-                    \[
-                    (.*?)           // id = $3
-                    \]
-                )
-                ()()()()            // pad rest of backreferences
-            /g, writeImageTag);
-            */
-            text = text.replace(/(!\[(.*?)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g, writeImageTag);
-
-            //
-            // Next, handle inline images:  ![alt text](url "optional title")
-            // Don't forget: encode * and _
-
-            /*
-            text = text.replace(/
-                (                   // wrap whole match in $1
-                    !\[
-                    (.*?)           // alt text = $2
-                    \]
-                    \s?             // One optional whitespace character
-                    \(              // literal paren
-                    [ \t]*
-                    ()              // no id, so leave $3 empty
-                    <?(\S+?)>?      // src url = $4
-                    [ \t]*
-                    (               // $5
-                        (['"])      // quote char = $6
-                        (.*?)       // title = $7
-                        \6          // matching quote
-                        [ \t]*
-                    )?              // title is optional
-                    \)
-                )
-            /g, writeImageTag);
-            */
-            text = text.replace(/(!\[(.*?)\]\s?\([ \t]*()<?(\S+?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g, writeImageTag);
-
-            return text;
-        }
-        
-        function attributeEncode(text) {
-            // unconditionally replace angle brackets here -- what ends up in an attribute (e.g. alt or title)
-            // never makes sense to have verbatim HTML in it (and the sanitizer would totally break it)
-            return text.replace(/>/g, "&gt;").replace(/</g, "&lt;").replace(/"/g, "&quot;");
-        }
-
-        function writeImageTag(wholeMatch, m1, m2, m3, m4, m5, m6, m7) {
-            var whole_match = m1;
-            var alt_text = m2;
-            var link_id = m3.toLowerCase();
-            var url = m4;
-            var title = m7;
-
-            if (!title) title = "";
-
-            if (url == "") {
-                if (link_id == "") {
-                    // lower-case and turn embedded newlines into spaces
-                    link_id = alt_text.toLowerCase().replace(/ ?\n/g, " ");
-                }
-                url = "#" + link_id;
-
-                if (g_urls.get(link_id) != undefined) {
-                    url = g_urls.get(link_id);
-                    if (g_titles.get(link_id) != undefined) {
-                        title = g_titles.get(link_id);
-                    }
-                }
-                else {
-                    return whole_match;
-                }
-            }
-            
-            alt_text = escapeCharacters(attributeEncode(alt_text), "*_[]()");
-            url = escapeCharacters(url, "*_");
-            var result = "<img src=\"" + url + "\" alt=\"" + alt_text + "\"";
-
-            // attacklab: Markdown.pl adds empty title attributes to images.
-            // Replicate this bug.
-
-            //if (title != "") {
-            title = attributeEncode(title);
-            title = escapeCharacters(title, "*_");
-            result += " title=\"" + title + "\"";
-            //}
-
-            result += " />";
-
-            return result;
-        }
-
-        function _DoHeaders(text) {
-
-            // Setext-style headers:
-            //  Header 1
-            //  ========
-            //  
-            //  Header 2
-            //  --------
-            //
-            text = text.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm,
-                function (wholeMatch, m1) { return "<h1>" + _RunSpanGamut(m1) + "</h1>\n\n"; }
-            );
-
-            text = text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm,
-                function (matchFound, m1) { return "<h2>" + _RunSpanGamut(m1) + "</h2>\n\n"; }
-            );
-
-            // atx-style headers:
-            //  # Header 1
-            //  ## Header 2
-            //  ## Header 2 with closing hashes ##
-            //  ...
-            //  ###### Header 6
-            //
-
-            /*
-            text = text.replace(/
-                ^(\#{1,6})      // $1 = string of #'s
-                [ \t]*
-                (.+?)           // $2 = Header text
-                [ \t]*
-                \#*             // optional closing #'s (not counted)
-                \n+
-            /gm, function() {...});
-            */
-
-            text = text.replace(/^(\#{1,6})[ \t]*(.+?)[ \t]*\#*\n+/gm,
-                function (wholeMatch, m1, m2) {
-                    var h_level = m1.length;
-                    return "<h" + h_level + ">" + _RunSpanGamut(m2) + "</h" + h_level + ">\n\n";
-                }
-            );
-
-            return text;
-        }
-
-        function _DoLists(text) {
-            //
-            // Form HTML ordered (numbered) and unordered (bulleted) lists.
-            //
-
-            // attacklab: add sentinel to hack around khtml/safari bug:
-            // http://bugs.webkit.org/show_bug.cgi?id=11231
-            text += "~0";
-
-            // Re-usable pattern to match any entirel ul or ol list:
-
-            /*
-            var whole_list = /
-                (                                   // $1 = whole list
-                    (                               // $2
-                        [ ]{0,3}                    // attacklab: g_tab_width - 1
-                        ([*+-]|\d+[.])              // $3 = first list item marker
-                        [ \t]+
-                    )
-                    [^\r]+?
-                    (                               // $4
-                        ~0                          // sentinel for workaround; should be $
-                        |
-                        \n{2,}
-                        (?=\S)
-                        (?!                         // Negative lookahead for another list item marker
-                            [ \t]*
-                            (?:[*+-]|\d+[.])[ \t]+
-                        )
-                    )
-                )
-            /g
-            */
-            var whole_list = /^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;
-
-            if (g_list_level) {
-                text = text.replace(whole_list, function (wholeMatch, m1, m2) {
-                    var list = m1;
-                    var list_type = (m2.search(/[*+-]/g) > -1) ? "ul" : "ol";
-
-                    var result = _ProcessListItems(list, list_type);
-
-                    // Trim any trailing whitespace, to put the closing `</$list_type>`
-                    // up on the preceding line, to get it past the current stupid
-                    // HTML block parser. This is a hack to work around the terrible
-                    // hack that is the HTML block parser.
-                    result = result.replace(/\s+$/, "");
-                    result = "<" + list_type + ">" + result + "</" + list_type + ">\n";
-                    return result;
-                });
-            } else {
-                whole_list = /(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g;
-                text = text.replace(whole_list, function (wholeMatch, m1, m2, m3) {
-                    var runup = m1;
-                    var list = m2;
-
-                    var list_type = (m3.search(/[*+-]/g) > -1) ? "ul" : "ol";
-                    var result = _ProcessListItems(list, list_type);
-                    result = runup + "<" + list_type + ">\n" + result + "</" + list_type + ">\n";
-                    return result;
-                });
-            }
-
-            // attacklab: strip sentinel
-            text = text.replace(/~0/, "");
-
-            return text;
-        }
-
-        var _listItemMarkers = { ol: "\\d+[.]", ul: "[*+-]" };
-
-        function _ProcessListItems(list_str, list_type) {
-            //
-            //  Process the contents of a single ordered or unordered list, splitting it
-            //  into individual list items.
-            //
-            //  list_type is either "ul" or "ol".
-
-            // The $g_list_level global keeps track of when we're inside a list.
-            // Each time we enter a list, we increment it; when we leave a list,
-            // we decrement. If it's zero, we're not in a list anymore.
-            //
-            // We do this because when we're not inside a list, we want to treat
-            // something like this:
-            //
-            //    I recommend upgrading to version
-            //    8. Oops, now this line is treated
-            //    as a sub-list.
-            //
-            // As a single paragraph, despite the fact that the second line starts
-            // with a digit-period-space sequence.
-            //
-            // Whereas when we're inside a list (or sub-list), that line will be
-            // treated as the start of a sub-list. What a kludge, huh? This is
-            // an aspect of Markdown's syntax that's hard to parse perfectly
-            // without resorting to mind-reading. Perhaps the solution is to
-            // change the syntax rules such that sub-lists must start with a
-            // starting cardinal number; e.g. "1." or "a.".
-
-            g_list_level++;
-
-            // trim trailing blank lines:
-            list_str = list_str.replace(/\n{2,}$/, "\n");
-
-            // attacklab: add sentinel to emulate \z
-            list_str += "~0";
-
-            // In the original attacklab showdown, list_type was not given to this function, and anything
-            // that matched /[*+-]|\d+[.]/ would just create the next <li>, causing this mismatch:
-            //
-            //  Markdown          rendered by WMD        rendered by MarkdownSharp
-            //  ------------------------------------------------------------------
-            //  1. first          1. first               1. first
-            //  2. second         2. second              2. second
-            //  - third           3. third                   * third
-            //
-            // We changed this to behave identical to MarkdownSharp. This is the constructed RegEx,
-            // with {MARKER} being one of \d+[.] or [*+-], depending on list_type:
-        
-            /*
-            list_str = list_str.replace(/
-                (^[ \t]*)                       // leading whitespace = $1
-                ({MARKER}) [ \t]+               // list marker = $2
-                ([^\r]+?                        // list item text   = $3
-                    (\n+)
-                )
-                (?=
-                    (~0 | \2 ({MARKER}) [ \t]+)
-                )
-            /gm, function(){...});
-            */
-
-            var marker = _listItemMarkers[list_type];
-            var re = new RegExp("(^[ \\t]*)(" + marker + ")[ \\t]+([^\\r]+?(\\n+))(?=(~0|\\1(" + marker + ")[ \\t]+))", "gm");
-            var last_item_had_a_double_newline = false;
-            list_str = list_str.replace(re,
-                function (wholeMatch, m1, m2, m3) {
-                    var item = m3;
-                    var leading_space = m1;
-                    var ends_with_double_newline = /\n\n$/.test(item);
-                    var contains_double_newline = ends_with_double_newline || item.search(/\n{2,}/) > -1;
-
-                    if (contains_double_newline || last_item_had_a_double_newline) {
-                        item = _RunBlockGamut(_Outdent(item), /* doNotUnhash = */true);
-                    }
-                    else {
-                        // Recursion for sub-lists:
-                        item = _DoLists(_Outdent(item));
-                        item = item.replace(/\n$/, ""); // chomp(item)
-                        item = _RunSpanGamut(item);
-                    }
-                    last_item_had_a_double_newline = ends_with_double_newline;
-                    return "<li>" + item + "</li>\n";
-                }
-            );
-
-            // attacklab: strip sentinel
-            list_str = list_str.replace(/~0/g, "");
-
-            g_list_level--;
-            return list_str;
-        }
-
-        function _DoCodeBlocks(text) {
-            //
-            //  Process Markdown `<pre><code>` blocks.
-            //  
-
-            /*
-            text = text.replace(/
-                (?:\n\n|^)
-                (                               // $1 = the code block -- one or more lines, starting with a space/tab
-                    (?:
-                        (?:[ ]{4}|\t)           // Lines must start with a tab or a tab-width of spaces - attacklab: g_tab_width
-                        .*\n+
-                    )+
-                )
-                (\n*[ ]{0,3}[^ \t\n]|(?=~0))    // attacklab: g_tab_width
-            /g ,function(){...});
-            */
-
-            // attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
-            text += "~0";
-
-            text = text.replace(/(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g,
-                function (wholeMatch, m1, m2) {
-                    var codeblock = m1;
-                    var nextChar = m2;
-
-                    codeblock = _EncodeCode(_Outdent(codeblock));
-                    codeblock = _Detab(codeblock);
-                    codeblock = codeblock.replace(/^\n+/g, ""); // trim leading newlines
-                    codeblock = codeblock.replace(/\n+$/g, ""); // trim trailing whitespace
-
-                    codeblock = "<pre><code>" + codeblock + "\n</code></pre>";
-
-                    return "\n\n" + codeblock + "\n\n" + nextChar;
-                }
-            );
-
-            // attacklab: strip sentinel
-            text = text.replace(/~0/, "");
-
-            return text;
-        }
-
-        function hashBlock(text) {
-            text = text.replace(/(^\n+|\n+$)/g, "");
-            return "\n\n~K" + (g_html_blocks.push(text) - 1) + "K\n\n";
-        }
-
-        function _DoCodeSpans(text) {
-            //
-            // * Backtick quotes are used for <code></code> spans.
-            // 
-            // * You can use multiple backticks as the delimiters if you want to
-            //   include literal backticks in the code span. So, this input:
-            //     
-            //      Just type ``foo `bar` baz`` at the prompt.
-            //     
-            //   Will translate to:
-            //     
-            //      <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
-            //     
-            //   There's no arbitrary limit to the number of backticks you
-            //   can use as delimters. If you need three consecutive backticks
-            //   in your code, use four for delimiters, etc.
-            //
-            // * You can use spaces to get literal backticks at the edges:
-            //     
-            //      ... type `` `bar` `` ...
-            //     
-            //   Turns to:
-            //     
-            //      ... type <code>`bar`</code> ...
-            //
-
-            /*
-            text = text.replace(/
-                (^|[^\\])       // Character before opening ` can't be a backslash
-                (`+)            // $2 = Opening run of `
-                (               // $3 = The code block
-                    [^\r]*?
-                    [^`]        // attacklab: work around lack of lookbehind
-                )
-                \2              // Matching closer
-                (?!`)
-            /gm, function(){...});
-            */
-
-            text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,
-                function (wholeMatch, m1, m2, m3, m4) {
-                    var c = m3;
-                    c = c.replace(/^([ \t]*)/g, ""); // leading whitespace
-                    c = c.replace(/[ \t]*$/g, ""); // trailing whitespace
-                    c = _EncodeCode(c);
-                    c = c.replace(/:\/\//g, "~P"); // to prevent auto-linking. Not necessary in code *blocks*, but in code spans. Will be converted back after the auto-linker runs.
-                    return m1 + "<code>" + c + "</code>";
-                }
-            );
-
-            return text;
-        }
-
-        function _EncodeCode(text) {
-            //
-            // Encode/escape certain characters inside Markdown code runs.
-            // The point is that in code, these characters are literals,
-            // and lose their special Markdown meanings.
-            //
-            // Encode all ampersands; HTML entities are not
-            // entities within a Markdown code span.
-            text = text.replace(/&/g, "&amp;");
-
-            // Do the angle bracket song and dance:
-            text = text.replace(/</g, "&lt;");
-            text = text.replace(/>/g, "&gt;");
-
-            // Now, escape characters that are magic in Markdown:
-            text = escapeCharacters(text, "\*_{}[]\\", false);
-
-            // jj the line above breaks this:
-            //---
-
-            //* Item
-
-            //   1. Subitem
-
-            //            special char: *
-            //---
-
-            return text;
-        }
-
-        function _DoItalicsAndBold(text) {
-
-            // <strong> must go first:
-            text = text.replace(/([\W_]|^)(\*\*|__)(?=\S)([^\r]*?\S[\*_]*)\2([\W_]|$)/g,
-            "$1<strong>$3</strong>$4");
-
-            text = text.replace(/([\W_]|^)(\*|_)(?=\S)([^\r\*_]*?\S)\2([\W_]|$)/g,
-            "$1<em>$3</em>$4");
-
-            return text;
-        }
-
-        function _DoBlockQuotes(text) {
-
-            /*
-            text = text.replace(/
-                (                           // Wrap whole match in $1
-                    (
-                        ^[ \t]*>[ \t]?      // '>' at the start of a line
-                        .+\n                // rest of the first line
-                        (.+\n)*             // subsequent consecutive lines
-                        \n*                 // blanks
-                    )+
-                )
-            /gm, function(){...});
-            */
-
-            text = text.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm,
-                function (wholeMatch, m1) {
-                    var bq = m1;
-
-                    // attacklab: hack around Konqueror 3.5.4 bug:
-                    // "----------bug".replace(/^-/g,"") == "bug"
-
-                    bq = bq.replace(/^[ \t]*>[ \t]?/gm, "~0"); // trim one level of quoting
-
-                    // attacklab: clean up hack
-                    bq = bq.replace(/~0/g, "");
-
-                    bq = bq.replace(/^[ \t]+$/gm, "");     // trim whitespace-only lines
-                    bq = _RunBlockGamut(bq);             // recurse
-
-                    bq = bq.replace(/(^|\n)/g, "$1  ");
-                    // These leading spaces screw with <pre> content, so we need to fix that:
-                    bq = bq.replace(
-                            /(\s*<pre>[^\r]+?<\/pre>)/gm,
-                        function (wholeMatch, m1) {
-                            var pre = m1;
-                            // attacklab: hack around Konqueror 3.5.4 bug:
-                            pre = pre.replace(/^  /mg, "~0");
-                            pre = pre.replace(/~0/g, "");
-                            return pre;
-                        });
-
-                    return hashBlock("<blockquote>\n" + bq + "\n</blockquote>");
-                }
-            );
-            return text;
-        }
-
-        function _FormParagraphs(text, doNotUnhash) {
-            //
-            //  Params:
-            //    $text - string to process with html <p> tags
-            //
-
-            // Strip leading and trailing lines:
-            text = text.replace(/^\n+/g, "");
-            text = text.replace(/\n+$/g, "");
-
-            var grafs = text.split(/\n{2,}/g);
-            var grafsOut = [];
-            
-            var markerRe = /~K(\d+)K/;
-
-            //
-            // Wrap <p> tags.
-            //
-            var end = grafs.length;
-            for (var i = 0; i < end; i++) {
-                var str = grafs[i];
-
-                // if this is an HTML marker, copy it
-                if (markerRe.test(str)) {
-                    grafsOut.push(str);
-                }
-                else if (/\S/.test(str)) {
-                    str = _RunSpanGamut(str);
-                    str = str.replace(/^([ \t]*)/g, "<p>");
-                    str += "</p>"
-                    grafsOut.push(str);
-                }
-
-            }
-            //
-            // Unhashify HTML blocks
-            //
-            if (!doNotUnhash) {
-                end = grafsOut.length;
-                for (var i = 0; i < end; i++) {
-                    var foundAny = true;
-                    while (foundAny) { // we may need several runs, since the data may be nested
-                        foundAny = false;
-                        grafsOut[i] = grafsOut[i].replace(/~K(\d+)K/g, function (wholeMatch, id) {
-                            foundAny = true;
-                            return g_html_blocks[id];
-                        });
-                    }
-                }
-            }
-            return grafsOut.join("\n\n");
-        }
-
-        function _EncodeAmpsAndAngles(text) {
-            // Smart processing for ampersands and angle brackets that need to be encoded.
-
-            // Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
-            //   http://bumppo.net/projects/amputator/
-            text = text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g, "&amp;");
-
-            // Encode naked <'s
-            text = text.replace(/<(?![a-z\/?\$!])/gi, "&lt;");
-
-            return text;
-        }
-
-        function _EncodeBackslashEscapes(text) {
-            //
-            //   Parameter:  String.
-            //   Returns:    The string, with after processing the following backslash
-            //               escape sequences.
-            //
-
-            // attacklab: The polite way to do this is with the new
-            // escapeCharacters() function:
-            //
-            //     text = escapeCharacters(text,"\\",true);
-            //     text = escapeCharacters(text,"`*_{}[]()>#+-.!",true);
-            //
-            // ...but we're sidestepping its use of the (slow) RegExp constructor
-            // as an optimization for Firefox.  This function gets called a LOT.
-
-            text = text.replace(/\\(\\)/g, escapeCharacters_callback);
-            text = text.replace(/\\([`*_{}\[\]()>#+-.!])/g, escapeCharacters_callback);
-            return text;
-        }
-
-        function _DoAutoLinks(text) {
-
-            // note that at this point, all other URL in the text are already hyperlinked as <a href=""></a>
-            // *except* for the <http://www.foo.com> case
-
-            // automatically add < and > around unadorned raw hyperlinks
-            // must be preceded by space/BOF and followed by non-word/EOF character    
-            text = text.replace(/(^|\s)(https?|ftp)(:\/\/[-A-Z0-9+&@#\/%?=~_|\[\]\(\)!:,\.;]*[-A-Z0-9+&@#\/%=~_|\[\]])($|\W)/gi, "$1<$2$3>$4");
-
-            //  autolink anything like <http://example.com>
-            
-            var replacer = function (wholematch, m1) { return "<a href=\"" + m1 + "\">" + pluginHooks.plainLinkText(m1) + "</a>"; }
-            text = text.replace(/<((https?|ftp):[^'">\s]+)>/gi, replacer);
-
-            // Email addresses: <address@domain.foo>
-            /*
-            text = text.replace(/
-                <
-                (?:mailto:)?
-                (
-                    [-.\w]+
-                    \@
-                    [-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
-                )
-                >
-            /gi, _DoAutoLinks_callback());
-            */
-
-            /* disabling email autolinking, since we don't do that on the server, either
-            text = text.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,
-                function(wholeMatch,m1) {
-                    return _EncodeEmailAddress( _UnescapeSpecialChars(m1) );
-                }
-            );
-            */
-            return text;
-        }
-
-        function _UnescapeSpecialChars(text) {
-            //
-            // Swap back in all the special characters we've hidden.
-            //
-            text = text.replace(/~E(\d+)E/g,
-                function (wholeMatch, m1) {
-                    var charCodeToReplace = parseInt(m1);
-                    return String.fromCharCode(charCodeToReplace);
-                }
-            );
-            return text;
-        }
-
-        function _Outdent(text) {
-            //
-            // Remove one level of line-leading tabs or spaces
-            //
-
-            // attacklab: hack around Konqueror 3.5.4 bug:
-            // "----------bug".replace(/^-/g,"") == "bug"
-
-            text = text.replace(/^(\t|[ ]{1,4})/gm, "~0"); // attacklab: g_tab_width
-
-            // attacklab: clean up hack
-            text = text.replace(/~0/g, "")
-
-            return text;
-        }
-
-        function _Detab(text) {
-            if (!/\t/.test(text))
-                return text;
-
-            var spaces = ["    ", "   ", "  ", " "],
-            skew = 0,
-            v;
-
-            return text.replace(/[\n\t]/g, function (match, offset) {
-                if (match === "\n") {
-                    skew = offset + 1;
-                    return match;
-                }
-                v = (offset - skew) % 4;
-                skew = offset + 1;
-                return spaces[v];
-            });
-        }
-
-        //
-        //  attacklab: Utility functions
-        //
-
-        var _problemUrlChars = /(?:["'*()[\]:]|~D)/g;
-
-        // hex-encodes some unusual "problem" chars in URLs to avoid URL detection problems 
-        function encodeProblemUrlChars(url) {
-            if (!url)
-                return "";
-
-            var len = url.length;
-
-            return url.replace(_problemUrlChars, function (match, offset) {
-                if (match == "~D") // escape for dollar
-                    return "%24";
-                if (match == ":") {
-                    if (offset == len - 1 || /[0-9\/]/.test(url.charAt(offset + 1)))
-                        return ":"
-                }
-                return "%" + match.charCodeAt(0).toString(16);
-            });
-        }
-
-
-        function escapeCharacters(text, charsToEscape, afterBackslash) {
-            // First we have to escape the escape characters so that
-            // we can build a character class out of them
-            var regexString = "([" + charsToEscape.replace(/([\[\]\\])/g, "\\$1") + "])";
-
-            if (afterBackslash) {
-                regexString = "\\\\" + regexString;
-            }
-
-            var regex = new RegExp(regexString, "g");
-            text = text.replace(regex, escapeCharacters_callback);
-
-            return text;
-        }
-
-
-        function escapeCharacters_callback(wholeMatch, m1) {
-            var charCodeToEscape = m1.charCodeAt(0);
-            return "~E" + charCodeToEscape + "E";
-        }
-
-    }; // end of the Markdown.Converter constructor
-
-})();