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October 13, 2011 01:16
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Showdown.js with GitHub Flavored Markdown
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| $(function() { | |
| var converter = new Showdown.converter(); | |
| $("#user_input").keyup(function(){ | |
| var txt = $("#user_input").val(); | |
| var html = converter.makeHtml(txt); | |
| $("#result").html(html) | |
| $("#html_result").val(html.replace(/>/g, ">\n").replace(/</g, "\n<").replace(/\n{2,}/g, "\n\n")); | |
| }); | |
| var sample = "#### Underscores\nthis should have _emphasis_\nthis_should_not\n_nor_should_this\n\n\ | |
| #### Autolinking\na non-markdown link: http://github.com/blog\nthis one is [a markdown link](http://github.com/blog)\nEmail test: [email protected]\n\n\ | |
| #### Commit links\nc4149e7bac80fcd1295060125670e78d3f15bf2e\ntekkub@c4149e7bac80fcd1295060125670e78d3f15bf2e\nmojombo/god@c4149e7bac80fcd1295060125670e78d3f15bf2e\n\n\ | |
| #### Issue links\nissue #1\ntekkub#1\nmojombo/god#1"; | |
| $("#user_input").text(sample); | |
| var html = converter.makeHtml(sample); | |
| $("#result").html(html); | |
| $("#html_result").val(html.replace(/>/g, ">\n").replace(/</g, "\n<").replace(/\n{2,}/g, "\n\n")); | |
| }); |
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| // | |
| // showdown.js -- A javascript port of Markdown. | |
| // | |
| // Copyright (c) 2007 John Fraser. | |
| // | |
| // Original Markdown Copyright (c) 2004-2005 John Gruber | |
| // <http://daringfireball.net/projects/markdown/> | |
| // | |
| // Redistributable under a BSD-style open source license. | |
| // See license.txt for more information. | |
| // | |
| // The full source distribution is at: | |
| // | |
| // A A L | |
| // T C A | |
| // T K B | |
| // | |
| // <http://www.attacklab.net/> | |
| // | |
| // | |
| // Wherever possible, Showdown is a straight, line-by-line port | |
| // of the Perl version of Markdown. | |
| // | |
| // This is not a normal parser design; it's basically just a | |
| // series of string substitutions. It's hard to read and | |
| // maintain this way, but keeping Showdown close to the original | |
| // design makes it easier to port new features. | |
| // | |
| // More importantly, Showdown behaves like markdown.pl in most | |
| // edge cases. So web applications can do client-side preview | |
| // in Javascript, and then build identical HTML on the server. | |
| // | |
| // This port needs the new RegExp functionality of ECMA 262, | |
| // 3rd Edition (i.e. Javascript 1.5). Most modern web browsers | |
| // should do fine. Even with the new regular expression features, | |
| // We do a lot of work to emulate Perl's regex functionality. | |
| // The tricky changes in this file mostly have the "attacklab:" | |
| // label. Major or self-explanatory changes don't. | |
| // | |
| // Smart diff tools like Araxis Merge will be able to match up | |
| // this file with markdown.pl in a useful way. A little tweaking | |
| // helps: in a copy of markdown.pl, replace "#" with "//" and | |
| // replace "$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. | |
| // | |
| // ************************************************** | |
| // GitHub Flavored Markdown modifications by Tekkub | |
| // http://github.github.com/github-flavored-markdown/ | |
| // | |
| // Modifications are tagged with "GFM" | |
| // ************************************************** | |
| // | |
| // 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,"~"); | |
| // ** GFM ** Auto-link URLs and emails | |
| text = text.replace(/https?\:\/\/[^"\s\<\>]*[^.,;'">\:\s\<\>\)\]\!]/g, function(wholeMatch,matchIndex){ | |
| var left = text.slice(0, matchIndex), right = text.slice(matchIndex) | |
| if (left.match(/<[^>]+$/) && right.match(/^[^>]*>/)) {return wholeMatch} | |
| href = wholeMatch.replace(/^http:\/\/github.com\//, "https://github.com/") | |
| return "<a href='" + href + "'>" + wholeMatch + "</a>"; | |
| }); | |
| text = text.replace(/[a-z0-9_\-+=.]+@[a-z0-9\-]+(\.[a-z0-9-]+)+/ig, function(wholeMatch){return "<a href='mailto:" + wholeMatch + "'>" + wholeMatch + "</a>";}); | |
| // ** GFM ** Auto-link sha1 if GitHub.nameWithOwner is defined | |
| text = text.replace(/[a-f0-9]{40}/ig, function(wholeMatch,matchIndex){ | |
| if (typeof(GitHub) == "undefined" || typeof(GitHub.nameWithOwner) == "undefined") {return wholeMatch;} | |
| var left = text.slice(0, matchIndex), right = text.slice(matchIndex) | |
| if (left.match(/@$/) || (left.match(/<[^>]+$/) && right.match(/^[^>]*>/))) {return wholeMatch;} | |
| return "<a href='http://github.com/" + GitHub.nameWithOwner + "/commit/" + wholeMatch + "'>" + wholeMatch.substring(0,7) + "</a>"; | |
| }); | |
| // ** GFM ** Auto-link user@sha1 if GitHub.nameWithOwner is defined | |
| text = text.replace(/([a-z0-9_\-+=.]+)@([a-f0-9]{40})/ig, function(wholeMatch,username,sha,matchIndex){ | |
| if (typeof(GitHub) == "undefined" || typeof(GitHub.nameWithOwner) == "undefined") {return wholeMatch;} | |
| GitHub.repoName = GitHub.repoName || _GetRepoName() | |
| var left = text.slice(0, matchIndex), right = text.slice(matchIndex) | |
| if (left.match(/\/$/) || (left.match(/<[^>]+$/) && right.match(/^[^>]*>/))) {return wholeMatch;} | |
| return "<a href='http://github.com/" + username + "/" + GitHub.repoName + "/commit/" + sha + "'>" + username + "@" + sha.substring(0,7) + "</a>"; | |
| }); | |
| // ** GFM ** Auto-link user/repo@sha1 | |
| text = text.replace(/([a-z0-9_\-+=.]+\/[a-z0-9_\-+=.]+)@([a-f0-9]{40})/ig, function(wholeMatch,repo,sha){ | |
| return "<a href='http://github.com/" + repo + "/commit/" + sha + "'>" + repo + "@" + sha.substring(0,7) + "</a>"; | |
| }); | |
| // ** GFM ** Auto-link #issue if GitHub.nameWithOwner is defined | |
| text = text.replace(/#([0-9]+)/ig, function(wholeMatch,issue,matchIndex){ | |
| if (typeof(GitHub) == "undefined" || typeof(GitHub.nameWithOwner) == "undefined") {return wholeMatch;} | |
| var left = text.slice(0, matchIndex), right = text.slice(matchIndex) | |
| if (left == "" || left.match(/[a-z0-9_\-+=.]$/) || (left.match(/<[^>]+$/) && right.match(/^[^>]*>/))) {return wholeMatch;} | |
| return "<a href='http://github.com/" + GitHub.nameWithOwner + "/issues/#issue/" + issue + "'>" + wholeMatch + "</a>"; | |
| }); | |
| // ** GFM ** Auto-link user#issue if GitHub.nameWithOwner is defined | |
| text = text.replace(/([a-z0-9_\-+=.]+)#([0-9]+)/ig, function(wholeMatch,username,issue,matchIndex){ | |
| if (typeof(GitHub) == "undefined" || typeof(GitHub.nameWithOwner) == "undefined") {return wholeMatch;} | |
| GitHub.repoName = GitHub.repoName || _GetRepoName() | |
| var left = text.slice(0, matchIndex), right = text.slice(matchIndex) | |
| if (left.match(/\/$/) || (left.match(/<[^>]+$/) && right.match(/^[^>]*>/))) {return wholeMatch;} | |
| return "<a href='http://github.com/" + username + "/" + GitHub.repoName + "/issues/#issue/" + issue + "'>" + wholeMatch + "</a>"; | |
| }); | |
| // ** GFM ** Auto-link user/repo#issue | |
| text = text.replace(/([a-z0-9_\-+=.]+\/[a-z0-9_\-+=.]+)#([0-9]+)/ig, function(wholeMatch,repo,issue){ | |
| return "<a href='http://github.com/" + repo + "/issues/#issue/" + issue + "'>" + wholeMatch + "</a>"; | |
| }); | |
| return text; | |
| } | |
| var _GetRepoName = function() { | |
| return GitHub.nameWithOwner.match(/^.+\/(.+)$/)[1] | |
| } | |
| 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:  | |
| // 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>" + _RunSpanGamut(m1) + "</h1>");}); | |
| text = text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm, | |
| function(matchFound,m1){return hashBlock("<h2>" + _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 + ">" + _RunSpanGamut(m2) + "</h" + h_level + ">"); | |
| }); | |
| 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(/(\w)_(\w)/g, "$1~E95E$2") // ** GFM ** "~E95E" == escaped "_" | |
| 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(/\n/g,"<br />"); // ** GFM ** | |
| 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: <[email protected]> | |
| /* | |
| 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. "[email protected]" | |
| // | |
| // 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 |
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