o: ActiveSupport::Cache::Entry :@compressedF:@expires_in0:@created_atf1337333318.727732:@value"—{I" class:EFI"ProcessedAsset;FI"logical_path;F"wmd/showdown.jsI" pathname;F"l/Users/vincent/.rvm/gems/ruby-1.9.3-p125/gems/wmd-rails-0.0.7/vendor/assets/javascripts/wmd/showdown.jsI"content_type;FI"application/javascript;FI" mtime;FI"2012-05-18T09:39:18+01:00;FI"length;FiĀ“I"digest;F"%f63007d334073d07e2c24c878d5a0970I"source;FI"Ā“// // showdown.js -- A javascript port of Markdown. // // Copyright (c) 2010-2011 Jarvis Badgley . // Copyright (c) 2007 John Fraser . // // Original Markdown Copyright (c) 2004-2005 John Gruber // // // // Showdown usage: // // var text = "Markdown *rocks*."; // // var converter = new Showdown.converter(); // var html = converter.makeHtml(text); // // alert(html); // // Note: move the sample code to the bottom of this // file before uncommenting it. // // // Showdown namespace // Showdown = {}; // // converter // // Wraps all "globals" so that the only thing // exposed is makeHtml(). // Showdown.converter = function () { // // Globals: // // 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 = 0; 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 // and tags get encoded. // // Clear the global hashes. If we don't clear these, you get conflicts // from other articles when generating a page which contains more than // one article (e.g. an index page that shows the N most recent // articles): g_urls = []; g_titles = []; g_html_blocks = []; // 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, "~"); // ** GFM ** Auto-link URLs and emails text = text.replace(/https?\:\/\/[^"\s<>]*[^.,;'">\:\s<>\)\]\!]/g, function (wholeMatch, matchIndex){ var left = text.slice(Math.max(0,text.lastIndexOf('\n',matchIndex)), matchIndex); var right = text.slice(matchIndex); if (left.match(/<([a-z]+)\s[^>]+>?$/) && right.match(/^[^>]*>/)) {return wholeMatch;} return "" + wholeMatch + ""; }); text = text.replace(/[a-z0-9_\-+=.]+@[a-z0-9\-]+(\.[a-z0-9\-]+)+/ig, function (wholeMatch, m1, matchIndex) { var left = text.slice(Math.max(0,text.lastIndexOf('\n',matchIndex)), matchIndex); if (left.match(/<([a-z]+)\s[^>]+>?$/) || left.match(/mailto\:$/)) {return wholeMatch;} return "" + wholeMatch + ""; }); return text; }; var _StripLinkDefinitions = function (text) { // // Strips link definitions from text, stores the URLs and titles in // hash references. // // Link defs are in the form: ^[id]: url "optional title" /* var text = text.replace(/ ^[ ]{0,3}\[(.+)\]: // id = $1 attacklab: g_tab_width - 1 [ \t]* \n? // maybe *one* newline [ \t]* ? // url = $2 [ \t]* \n? // maybe one newline [ \t]* (?: (\n*) // any lines skipped = $3 attacklab: lookbehind removed ["(] (.+?) // title = $4 [")] [ \t]* )? // title is optional (?:\n+|$) /gm, function(){...}); */ text = text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+)/gm, function (wholeMatch, m1, m2, m3, m4) { m1 = m1.toLowerCase(); g_urls[m1] = _EncodeAmpsAndAngles(m2); // Link IDs are case-insensitive if (m3) { // Oops, found blank lines, so it's not a title. // Put back the parenthetical statement we stole. return m3 + m4; } else if (m4) { g_titles[m1] = m4.replace(/"/g, """); } // Completely remove the definition from the text return ""; }); return text; }; var _HashHTMLBlocks = function (text) { // attacklab: Double up blank lines to reduce lookaround text = text.replace(/\n/g, "\n\n"); // 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

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.: //

// tags for inner block must be indented. //

// // 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 `

` and stop at the first `

`. // attacklab: This regex can be expensive when it fails. /* var 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 // 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` to `\n` // /* var 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 .* // 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

. It was easier to make a special case than // to make the other regex more complicated. /* text = text.replace(/ ( // save in $1 \n\n // Starting after a blank line [ ]{0,3} (<(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(/ ( // save in $1 \n\n // Starting after a blank line [ ]{0,3} // attacklab: g_tab_width - 1 [ \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 (?: <([?%]) // $2 [^\r]*? \2> ) [ \t]* (?=\n{2,}) // followed by a blank line ) /g,hashElement); */ text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g, hashElement); // attacklab: Undo double lines (see comment at top of this function) text = text.replace(/\n\n/g, "\n"); return text; }; var hashElement = function (wholeMatch, m1) { var blockText = m1; // Undo double lines blockText = blockText.replace(/\n\n/g, "\n"); blockText = blockText.replace(/^\n/, ""); // strip trailing blank lines blockText = blockText.replace(/\n+$/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; }; var _RunBlockGamut = function (text) { // // These are all the transformations that form block-level // tags like paragraphs, headers, and list items. // text = _DoHeaders(text); // Do Horizontal Rules: var key = hashBlock("

"); text = text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm, key); text = text.replace(/^[ ]{0,2}([ ]?\-[ ]?){3,}[ \t]*$/gm, key); text = text.replace(/^[ ]{0,2}([ ]?\_[ ]?){3,}[ \t]*$/gm, key); 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 //

tags around block-level tags. text = _HashHTMLBlocks(text); text = _FormParagraphs(text); return text; }; var _RunSpanGamut = function (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 `` // Must come after _DoAnchors(), because you can use < and > // delimiters in inline links like [this](). text = _DoAutoLinks(text); text = _EncodeAmpsAndAngles(text); text = _ConvertExtraSpecialCharacters(text); text = _DoItalicsAndBold(text); // Do hard breaks: text = text.replace(/ {2,}\n/g, "
\n"); return text; }; var _EscapeSpecialCharsWithinTagAttributes = function (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. var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|)/gi; text = text.replace(regex, function (wholeMatch) { var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g, "$1`"); tag = escapeCharacters(tag, "\\`*_"); return tag; }); return text; }; var _DoAnchors = function (text) { // // Turn Markdown link shortcuts into XHTML 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,_DoAnchors_callback); */ 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 [ \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(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]$[ \t]*()?[ \t]*((['"])(.*?)\6[ \t]*)?$)/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; }; var writeAnchorTag = function (wholeMatch, m1, m2, m3, m4, m5, m6, m7) { if (m7 === undefined) m7 = ""; var whole_match = m1; var link_text = m2; var link_id = m3.toLowerCase(); var url = m4; var title = m7; var blank_target = false; if (url === "") { if (link_id === "") { // lower-case and turn embedded newlines into spaces link_id = link_text.toLowerCase().replace(/ ?\n/g, " "); } else { if (link_id[0]=="!") { blank_target = true; link_id = link_id.substr(1); } } url = "#" + link_id; if (g_urls[link_id] !== undefined) { url = g_urls[link_id]; if (g_titles[link_id] !== undefined) { title = g_titles[link_id]; } if (url[0]=="!") { blank_target = true; url = url.substr(1); } } else { if (whole_match.search(/$\s*$$/m) > -1) { // Special case for explicit empty url url = ""; } else { return whole_match; } } } else { if (url[0]=="!") { blank_target = true; url = url.substr(1); } } url = escapeCharacters(url, "*_"); var result = ""; return result; }; var _DoImages = function (text) { // // Turn Markdown image shortcuts into 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 ? // src url = $4 [ \t]* ( // $5 (['"]) // quote char = $6 (.*?) // title = $7 \6 // matching quote [ \t]* )? // title is optional $ ) /g,writeImageTag); */ text = text.replace(/(!\[(.*?)\]\s?$[ \t]*()?[ \t]*((['"])(.*?)\6[ \t]*)?$)/g, writeImageTag); return text; }; var writeImageTag = function (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[link_id] !== undefined) { url = g_urls[link_id]; if (g_titles[link_id] !== undefined) { title = g_titles[link_id]; } } else { return whole_match; } } alt_text = alt_text.replace(/"/g, """); url = escapeCharacters(url, "*_"); var result = " $\""$ " + _RunSpanGamut(m1) + ""); }); text = text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm, function (matchFound, m1) { return hashBlock("

" + _RunSpanGamut(m1) + "

"); }); // 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 hashBlock("" + _RunSpanGamut(m2) + ""); }); return text; }; // This declaration keeps Dojo compressor from outputting garbage: var _ProcessListItems; var _DoLists = function (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"; // Turn double returns into triple returns, so that we can make a // paragraph for the last item in a list, if necessary: list = list.replace(/\n{2,}/g, "\n\n\n"); var result = _ProcessListItems(list); // Trim any trailing whitespace, to put the closing `` // 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 + "\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"; // Turn double returns into triple returns, so that we can make a // paragraph for the last item in a list, if necessary: list = list.replace(/\n{2,}/g, "\n\n\n"); var result = _ProcessListItems(list); result = runup + "<" + list_type + ">\n" + result + "\n"; return result; }); } // attacklab: strip sentinel text = text.replace(/~0/, ""); return text; }; _ProcessListItems = function (list_str) { // // Process the contents of a single ordered or unordered list, splitting it // into individual list items. // // 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"; /* list_str = list_str.replace(/ (\n)? // leading line = $1 (^[ \t]*) // leading whitespace = $2 ([*+-]|\d+[.]) [ \t]+ // list marker = $3 ([^\r]+? // list item text = $4 (\n{1,2})) (?= \n* (~0 | \2 ([*+-]|\d+[.]) [ \t]+)) /gm, function(){...}); */ list_str = list_str.replace(/(\n)?(^[ \t]*)([*+\-]|\d+[.])[ \t]+([^\r]+?(\n{1,2}))(?=\n*(~0|\2([*+\-]|\d+[.])[ \t]+))/gm, function (wholeMatch, m1, m2, m3, m4) { var item = m4; var leading_line = m1; var leading_space = m2; if (leading_line || (item.search(/\n{2,}/) > -1)) { item = _RunBlockGamut(_Outdent(item)); } else { // Recursion for sub-lists: item = _DoLists(_Outdent(item)); item = item.replace(/\n$/, ""); // chomp(item) item = _RunSpanGamut(item); } return "

" + item + "

\n"; }); // attacklab: strip sentinel list_str = list_str.replace(/~0/g, ""); g_list_level--; return list_str; }; var _DoCodeBlocks = function (text) { // // Process Markdown `

` blocks.
		//  
/*
		text = text.replace(text,
			/(?:\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 = "" + codeblock + "\n";

			return hashBlock(codeblock) + nextChar;
		});

		// attacklab: strip sentinel
		text = text.replace(/~0/, "");

		return text;
	};

	var hashBlock = function (text) {
		text = text.replace(/(^\n+|\n+$)/g, "");
		return "\n\n~K" + (g_html_blocks.push(text) - 1) + "K\n\n";
	};


	var _DoCodeSpans = function (text) {
		//
		//   *  Backtick quotes are used for  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:
		//	 
		//		 Just type foo `bar` baz at the prompt.
		//	 
		//	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 `bar` ...
		//
/*
		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);
			return m1 + "" + c + "";
		});


		// Process ^^superscript^^ notation
		text = text.replace(/(^|[^\\])(\^{2})([^\r]*?[^\^]{2})\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);
			return m1 + "^{" + c + "}";
		});

		// Process ,,subscript,, notation
		text = text.replace(/(^|[^\\])(,{2})([^\r]*?[^,]{2})\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);
			return m1 + "_{" + c + "}";
		});

		// Process ~~strike~~ notation
		text = text.replace(/(^|[^\\])(~T~T)([^\r]*?[^~]{2})\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);
			return m1 + "" + c + "";
		});
		
		return text;
	};


	var _EncodeCode = function (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, "&");

		// Do the angle bracket song and dance:
		text = text.replace(//g, ">");

		// Encode "smart" quotes
		text = text.
			replace( /\u2026/g	, '…').
			replace( /\u00AB/g	, '«'	).
			replace( /\u00BB/g	, '»'	).
			replace( /\u201C/g	, '“'	).
			replace( /\u201D/g	, '”'	).
			replace( /\u2018/g	, '‘'	).
			replace( /\u2019/g	, '’'	).
			replace( /\u2014/g	, '—'	).
			replace( /\u2013/g	, '–'	).
			replace( /\u2022/g	, '•'	).
			replace( /\u2122/g	, '™'	).
			replace( /\u00A9/g	, '©'	).
			replace( /\u00AE/g	, '®'	);


		// 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;
	};


	var _DoItalicsAndBold = function (text) {

		if (true) { //eventually this will be replaced with a runtime option. But for now we're forcing it.
			text = text.replace(/(\*\*)(?=\S)([^\r]*?\S[*]*)\1/g, "$2");
			text = text.replace(/(\w)_(\w)/g, "$1~E95E$2"); // ** GFM **  "~E95E" == escaped "_"
			text = text.replace(/(\*)(?=\S)([^\r]*?\S)\1/g, "$2");
			text = text.replace(/(_)(?=\S)([^\r]*?\S)\1/g, "$2");
		} else {
			//  must go first:
			text = text.replace(/(\*\*|__)(?=\S)([^\r]*?\S[*_]*)\1/g, "$2");

			text = text.replace(/(\w)_(\w)/g, "$1~E95E$2"); // ** GFM **  "~E95E" == escaped "_"
			text = text.replace(/(\*|_)(?=\S)([^\r]*?\S)\1/g, "$2");
		}

		return text;
	};


	var _DoBlockQuotes = function (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  content, so we need to fix that:
			bq = bq.replace(/(\s*[^\r]+?<\/pre>)/gm, function (wholeMatch, m1) {
				var pre = m1;
				// attacklab: hack around Konqueror 3.5.4 bug:
				pre = pre.replace(/^ {2}/mg, "~0");
				pre = pre.replace(/~0/g, "");
				return pre;
			});

			return hashBlock("\n" + bq + "\n");
		});
		return text;
	};


	var _FormParagraphs = function (text) {
		//
		//  Params:
		//    $text - string to process with html  tags
		//
		// Strip leading and trailing lines:
		text = text.replace(/^\n+/g, "");
		text = text.replace(/\n+$/g, "");

		var i;
		var grafs = text.split(/\n{2,}/g);
		var grafsOut = [];

		//
		// Wrap 
 tags.
		//
		var end = grafs.length;
		for (i = 0; i < end; i++) {
			var str = grafs[i];
			var p_tag = '
';

			// if this is an HTML marker, copy it
			if (str.search(/~K(\d+)K/g) >= 0) {
				grafsOut.push(str);
			}
			else if (str.search(/\S/) >= 0) {
				str = _RunSpanGamut(str);
				
				if (str.substr(0,2)==='->') {
					if (str.substr(-5)==='<-') {
						p_tag = '
';
						str = str.slice(2,-5);
					} else {
						p_tag = '
';
						str = str.substring(2);
					}
				}
				
				str = str.replace(/\n/g, "
"); // ** GFM **
				str = str.replace(/^([ \t]*)/g, p_tag);
				str += "";
				grafsOut.push(str);
			}

		}

		//
		// Unhashify HTML blocks
		//
		end = grafsOut.length;
		for (i = 0; i < end; i++) {
			// if this is a marker for an html block...
			while (grafsOut[i].search(/~K(\d+)K/) >= 0) {
				var blockText = g_html_blocks[RegExp.$1];
				blockText = blockText.replace(/\$/g, "$$$$"); // Escape any dollar signs
				grafsOut[i] = grafsOut[i].replace(/~K\d+K/, blockText);
			}
		}

		return grafsOut.join("\n\n");
	};


	var _EncodeAmpsAndAngles = function (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, "&");

		// Encode naked <'s
		text = text.replace(/<(?![a-z\/?\$!])/gi, "<");

		// Encode "smart" quotes
		text = text.
			replace( /\u2026/g	, '…').
			replace( /\u00AB/g	, '«'	).
			replace( /\u00BB/g	, '»'	).
			replace( /\u201C/g	, '“'	).
			replace( /\u201D/g	, '”'	).
			replace( /\u2018/g	, '‘'	).
			replace( /\u2019/g	, '’'	).
			replace( /\u2014/g	, '—'	).
			replace( /\u2013/g	, '–'	).
			replace( /\u2022/g	, '•'	).
			replace( /\u2122/g	, '™'	).
			replace( /\u00A9/g	, '©'	).
			replace( /\u00AE/g	, '®'	);

		return text;
	};
	
	var _ConvertExtraSpecialCharacters = function (text) {
		// Processing to change various special character combinations into
		// common real characters.
		
		text = text.
			replace( /\.\.\./g	, '…').
			replace( /\(c\)/g	, '©').
			replace( /\(r\)/g	, '®').
			replace( /\(tm\)/g	, '™').
			replace( /\-\-/g, '—');
	
		return text;
	};


	var _EncodeBackslashEscapes = function (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;
	};


	var _DoAutoLinks = function (text) {

		text = text.replace(/(?:")<((https?|ftp|dict):[^'">\s]+)>/gi, "$1");

		// Email addresses: 
/*
		text = text.replace(/
			<
			(?:mailto:)?
			(
				[-.\w]+
				\@
				[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
			)
			>
		/gi, _DoAutoLinks_callback());
	*/
		text = text.replace(/<(?:mailto:)?([\-.\w]+\@[\-a-z0-9]+(\.[\-a-z0-9]+)*\.[a-z]+)>/gi, function (wholeMatch, m1) {
			return _EncodeEmailAddress(_UnescapeSpecialChars(m1));
		});

		return text;
	};


	var _EncodeEmailAddress = function (addr) {
		//
		//  Input: an email address, e.g. "foo@example.com"
		//
		//  Output: the email address as a mailto link, with each character
		//	of the address encoded as either a decimal or hex entity, in
		//	the hopes of foiling most address harvesting spam bots. E.g.:
		//
		//	foo
		//	   @example.com
		//
		//  Based on a filter by Matthew Wickline, posted to the BBEdit-Talk
		//  mailing list: 
		//
		// attacklab: why can't javascript speak hex?


		function char2hex(ch) {
			var hexDigits = '0123456789ABCDEF';
			var dec = ch.charCodeAt(0);
			return (hexDigits.charAt(dec >> 4) + hexDigits.charAt(dec & 15));
		}

		var encode = [
			function (ch) {
			return "&#" + ch.charCodeAt(0) + ";";},
			function (ch) {
			return "&#x" + char2hex(ch) + ";";},
			function (ch) {
			return ch;}
		];

		addr = "mailto:" + addr;

		addr = addr.replace(/./g, function (ch) {
			if (ch == "@") {
				// this *must* be encoded. I insist.
				ch = encode[Math.floor(Math.random() * 2)](ch);
			} else if (ch != ":") {
				// leave ':' alone (to spot mailto: later)
				var r = Math.random();
				// roughly 10% raw, 45% hex, 45% dec
				ch = (
				r > 0.9 ? encode[2](ch) : r > 0.45 ? encode[1](ch) : encode[0](ch));
			}
			return ch;
		});

		addr = "" + addr + "";
		addr = addr.replace(/">.+:/g, "\">"); // strip the mailto: from the visible part
		return addr;
	};


	var _UnescapeSpecialChars = function (text) {
		//
		// Swap back in all the special characters we've hidden.
		//
		text = text.replace(/~E(\d+)E/g, function (wholeMatch, m1) {
			var charCodeToReplace = parseInt(m1,10);
			return String.fromCharCode(charCodeToReplace);
		});
		return text;
	};


	var _Outdent = function (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;
	};

	var _Detab = function (text) {
		// attacklab: Detab's completely rewritten for speed.
		// In perl we could fix it by anchoring the regexp with \G.
		// In javascript we're less fortunate.
		// expand first n-1 tabs
		text = text.replace(/\t(?=\t)/g, "    "); // attacklab: g_tab_width
		// replace the nth with two sentinels
		text = text.replace(/\t/g, "~A~B");

		// use the sentinel to anchor our regex so it doesn't explode
		text = text.replace(/~B(.+?)~A/g, function (wholeMatch, m1, m2) {
			var leadingText = m1;
			var numSpaces = 4 - leadingText.length % 4; // attacklab: g_tab_width
			// there *must* be a better way to do this:
			for (var i = 0; i < numSpaces; i++) leadingText += " ";

			return leadingText;
		});

		// clean up sentinels
		text = text.replace(/~A/g, "    "); // attacklab: g_tab_width
		text = text.replace(/~B/g, "");

		return text;
	};


	//
	//  attacklab: Utility functions
	//

	var escapeCharacters = function (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;
	};


	var escapeCharacters_callback = function (wholeMatch, m1) {
		var charCodeToEscape = m1.charCodeAt(0);
		return "~E" + charCodeToEscape + "E";
	};

}; // end of Attacklab.showdown.converter
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