| // |
| // showdown.js -- A javascript port of Markdown. |
| // |
| // Copyright (c) 2007 John Fraser. |
| // |
| // Original Markdown Copyright (c) 2004-2005 John Gruber |
| // <http://daringfireball.net/projects/markdown/> |
| // |
| // Redistributable under a BSD-style open source license. |
| // See license.txt for more information. |
| // |
| // The full source distribution is at: |
| // |
| // A A L |
| // T C A |
| // T K B |
| // |
| // <http://www.attacklab.net/> |
| // |
| |
| // |
| // 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. |
| // |
| |
| |
| // |
| // 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 |
| // |
| var 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 <a> |
| // and <img> 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 = new Array(); |
| g_titles = new Array(); |
| g_html_blocks = new Array(); |
| |
| // 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,"~"); |
| |
| 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]* |
| <?(\S+?)>? // 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(){...}); |
| */ |
| var text = text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|\Z)/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 <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. |
| /* |
| 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 |
| </\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` |
| // |
| |
| /* |
| 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 |
| .*</\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(/ |
| ( // 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 |
| <! |
| (--[^\r]*?--\s*)+ |
| > |
| [ \t]* |
| (?=\n{2,}) // followed by a blank line |
| ) |
| /g,hashElement); |
| */ |
| text = text.replace(/(\n\n[ ]{0,3}<!(--[^\r]*?--\s*)+>[ \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("<hr />"); |
| 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]*$/gm,key); |
| |
| text = _DoLists(text); |
| text = _DoCodeBlocks(text); |
| text = _DoBlockQuotes(text); |
| |
| // We already ran _HashHTMLBlocks() before, in Markdown(), but that |
| // was to escape raw HTML in the original Markdown source. This time, |
| // we're escaping the markup we've just created, so that we don't wrap |
| // <p> tags around block-level tags. |
| text = _HashHTMLBlocks(text); |
| text = _FormParagraphs(text); |
| |
| return text; |
| } |
| |
| |
| var _RunSpanGamut = function(text) { |
| // |
| // These are all the transformations that occur *within* block-level |
| // tags like paragraphs, headers, and list items. |
| // |
| |
| text = _DoCodeSpans(text); |
| text = _EscapeSpecialCharsWithinTagAttributes(text); |
| text = _EncodeBackslashEscapes(text); |
| |
| // Process anchor and image tags. Images must come first, |
| // because ![foo][f] looks like an anchor. |
| text = _DoImages(text); |
| text = _DoAnchors(text); |
| |
| // Make links out of things like `<http://example.com/>` |
| // Must come after _DoAnchors(), because you can use < and > |
| // delimiters in inline links like [this](<url>). |
| text = _DoAutoLinks(text); |
| text = _EncodeAmpsAndAngles(text); |
| text = _DoItalicsAndBold(text); |
| |
| // Do hard breaks: |
| text = text.replace(/ +\n/g," <br />\n"); |
| |
| return text; |
| } |
| |
| var _EscapeSpecialCharsWithinTagAttributes = function(text) { |
| // |
| // Within tags -- meaning between < and > -- encode [\ ` * _] so they |
| // don't conflict with their use in Markdown for code, italics and strong. |
| // |
| |
| // Build a regex to find HTML tags and comments. See Friedl's |
| // "Mastering Regular Expressions", 2nd Ed., pp. 200-201. |
| var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--.*?--\s*)+>)/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 <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,_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; |
| |
| 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[link_id] != undefined) { |
| url = g_urls[link_id]; |
| if (g_titles[link_id] != undefined) { |
| title = g_titles[link_id]; |
| } |
| } |
| else { |
| if (whole_match.search(/\(\s*\)$/m)>-1) { |
| // Special case for explicit empty url |
| url = ""; |
| } else { |
| return whole_match; |
| } |
| } |
| } |
| |
| url = escapeCharacters(url,"*_"); |
| var result = "<a href=\"" + url + "\""; |
| |
| if (title != "") { |
| title = title.replace(/"/g,"""); |
| title = escapeCharacters(title,"*_"); |
| result += " title=\"" + title + "\""; |
| } |
| |
| result += ">" + link_text + "</a>"; |
| |
| return result; |
| } |
| |
| |
| var _DoImages = function(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; |
| } |
| |
| 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 = "<img src=\"" + url + "\" alt=\"" + alt_text + "\""; |
| |
| // attacklab: Markdown.pl adds empty title attributes to images. |
| // Replicate this bug. |
| |
| //if (title != "") { |
| title = title.replace(/"/g,"""); |
| title = escapeCharacters(title,"*_"); |
| result += " title=\"" + title + "\""; |
| //} |
| |
| result += " />"; |
| |
| return result; |
| } |
| |
| |
| var _DoHeaders = function(text) { |
| |
| // Setext-style headers: |
| // Header 1 |
| // ======== |
| // |
| // Header 2 |
| // -------- |
| // |
| text = text.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm, |
| function(wholeMatch,m1){return hashBlock('<h1 id="' + headerId(m1) + '">' + _RunSpanGamut(m1) + "</h1>");}); |
| |
| text = text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm, |
| function(matchFound,m1){return hashBlock('<h2 id="' + headerId(m1) + '">' + _RunSpanGamut(m1) + "</h2>");}); |
| |
| // 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("<h" + h_level + ' id="' + headerId(m2) + '">' + _RunSpanGamut(m2) + "</h" + h_level + ">"); |
| }); |
| |
| function headerId(m) { |
| return m.replace(/[^\w]/g, '').toLowerCase(); |
| } |
| 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 `</$list_type>` |
| // up on the preceding line, to get it past the current stupid |
| // HTML block parser. This is a hack to work around the terrible |
| // hack that is the HTML block parser. |
| result = result.replace(/\s+$/,""); |
| 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"; |
| // Turn double returns into triple returns, so that we can make a |
| // paragraph for the last item in a list, if necessary: |
| var list = list.replace(/\n{2,}/g,"\n\n\n");; |
| var result = _ProcessListItems(list); |
| result = runup + "<"+list_type+">\n" + result + "</"+list_type+">\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 "<li>" + item + "</li>\n"; |
| } |
| ); |
| |
| // attacklab: strip sentinel |
| list_str = list_str.replace(/~0/g,""); |
| |
| g_list_level--; |
| return list_str; |
| } |
| |
| |
| var _DoCodeBlocks = function(text) { |
| // |
| // Process Markdown `<pre><code>` 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 = "<pre><code>" + codeblock + "\n</code></pre>"; |
| |
| 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 <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); |
| return m1+"<code>"+c+"</code>"; |
| }); |
| |
| 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,"<"); |
| text = text.replace(/>/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) { |
| |
| // <strong> must go first: |
| text = text.replace(/(\*\*|__)(?=\S)([^\r]*?\S[*_]*)\1/g, |
| "<strong>$2</strong>"); |
| |
| text = text.replace(/(\*|_)(?=\S)([^\r]*?\S)\1/g, |
| "<em>$2</em>"); |
| |
| 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 <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; |
| } |
| |
| |
| var _FormParagraphs = function(text) { |
| // |
| // 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 = new Array(); |
| |
| // |
| // 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 (str.search(/~K(\d+)K/g) >= 0) { |
| grafsOut.push(str); |
| } |
| else if (str.search(/\S/) >= 0) { |
| str = _RunSpanGamut(str); |
| str = str.replace(/^([ \t]*)/g,"<p>"); |
| str += "</p>" |
| grafsOut.push(str); |
| } |
| |
| } |
| |
| // |
| // Unhashify HTML blocks |
| // |
| end = grafsOut.length; |
| for (var 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,"<"); |
| |
| 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,"<a href=\"$1\">$1</a>"); |
| |
| // Email addresses: <address@domain.foo> |
| |
| /* |
| 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.: |
| // |
| // <a href="mailto:foo@e |
| // xample.com">foo |
| // @example.com</a> |
| // |
| // Based on a filter by Matthew Wickline, posted to the BBEdit-Talk |
| // mailing list: <http://tinyurl.com/yu7ue> |
| // |
| |
| // 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 > .9 ? encode[2](ch) : |
| r > .45 ? encode[1](ch) : |
| encode[0](ch) |
| ); |
| } |
| return ch; |
| }); |
| |
| addr = "<a href=\"" + addr + "\">" + addr + "</a>"; |
| 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); |
| 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 Showdown.converter |
| |
| // export |
| if (typeof exports != 'undefined') exports.Showdown = Showdown; |