update markdown converter from showdown source, handles trailing parens etc.
This commit is contained in:
Sam Saffron
parent
374820ae8b
commit
e55b713c59
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@ -1,3 +1,5 @@
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/* LICENSE: http://code.google.com/p/pagedown/source/browse/LICENSE.txt */
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var Markdown;
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if (typeof exports === "object" && typeof require === "function") // we're in a CommonJS (e.g. Node.js) module
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@ -67,7 +69,11 @@ else
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if (original === identity)
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this[hookname] = func;
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else
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this[hookname] = function (x) { return func(original(x)); }
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this[hookname] = function (text) {
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var args = Array.prototype.slice.call(arguments, 0);
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args[0] = original.apply(null, args);
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return func.apply(null, args);
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};
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},
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set: function (hookname, func) {
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if (!this[hookname])
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@ -103,9 +109,28 @@ else
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Markdown.Converter = function () {
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var pluginHooks = this.hooks = new HookCollection();
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pluginHooks.addNoop("plainLinkText"); // given a URL that was encountered by itself (without markup), should return the link text that's to be given to this link
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pluginHooks.addNoop("preConversion"); // called with the orignal text as given to makeHtml. The result of this plugin hook is the actual markdown source that will be cooked
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pluginHooks.addNoop("postConversion"); // called with the final cooked HTML code. The result of this plugin hook is the actual output of makeHtml
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// given a URL that was encountered by itself (without markup), should return the link text that's to be given to this link
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pluginHooks.addNoop("plainLinkText");
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// called with the orignal text as given to makeHtml. The result of this plugin hook is the actual markdown source that will be cooked
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pluginHooks.addNoop("preConversion");
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// called with the text once all normalizations have been completed (tabs to spaces, line endings, etc.), but before any conversions have
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pluginHooks.addNoop("postNormalization");
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// Called with the text before / after creating block elements like code blocks and lists. Note that this is called recursively
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// with inner content, e.g. it's called with the full text, and then only with the content of a blockquote. The inner
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// call will receive outdented text.
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pluginHooks.addNoop("preBlockGamut");
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pluginHooks.addNoop("postBlockGamut");
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// called with the text of a single block element before / after the span-level conversions (bold, code spans, etc.) have been made
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pluginHooks.addNoop("preSpanGamut");
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pluginHooks.addNoop("postSpanGamut");
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// called with the final cooked HTML code. The result of this plugin hook is the actual output of makeHtml
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pluginHooks.addNoop("postConversion");
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//
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// Private state of the converter instance:
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@ -169,6 +194,8 @@ else
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// contorted like /[ \t]*\n+/ .
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text = text.replace(/^[ \t]+$/mg, "");
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text = pluginHooks.postNormalization(text);
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// Turn block-level HTML blocks into hash entries
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text = _HashHTMLBlocks(text);
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@ -379,11 +406,16 @@ else
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return blockText;
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}
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var blockGamutHookCallback = function (t) { return _RunBlockGamut(t); }
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function _RunBlockGamut(text, doNotUnhash) {
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//
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// These are all the transformations that form block-level
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// tags like paragraphs, headers, and list items.
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//
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text = pluginHooks.preBlockGamut(text, blockGamutHookCallback);
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text = _DoHeaders(text);
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// Do Horizontal Rules:
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@ -396,6 +428,8 @@ else
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text = _DoCodeBlocks(text);
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text = _DoBlockQuotes(text);
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text = pluginHooks.postBlockGamut(text, blockGamutHookCallback);
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// We already ran _HashHTMLBlocks() before, in Markdown(), but that
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// was to escape raw HTML in the original Markdown source. This time,
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// we're escaping the markup we've just created, so that we don't wrap
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@ -412,6 +446,8 @@ else
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// tags like paragraphs, headers, and list items.
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//
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text = pluginHooks.preSpanGamut(text);
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text = _DoCodeSpans(text);
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text = _EscapeSpecialCharsWithinTagAttributes(text);
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text = _EncodeBackslashEscapes(text);
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@ -434,6 +470,8 @@ else
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// Do hard breaks:
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text = text.replace(/ +\n/g, " <br>\n");
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text = pluginHooks.postSpanGamut(text);
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return text;
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}
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@ -1169,7 +1207,7 @@ else
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text = text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g, "&");
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// Encode naked <'s
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text = text.replace(/<(?![a-z\/?\$!])/gi, "<");
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text = text.replace(/<(?![a-z\/?!]|~D)/gi, "<");
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return text;
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}
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@ -1195,23 +1233,77 @@ else
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return text;
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}
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function handleTrailingParens(wholeMatch, lookbehind, protocol, link) {
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if (lookbehind)
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return wholeMatch;
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if (link.charAt(link.length - 1) !== ")")
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return "<" + protocol + link + ">";
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var parens = link.match(/[()]/g);
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var level = 0;
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for (var i = 0; i < parens.length; i++) {
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if (parens[i] === "(") {
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if (level <= 0)
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level = 1;
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else
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level++;
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}
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else {
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level--;
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}
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}
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var tail = "";
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if (level < 0) {
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var re = new RegExp("\\){1," + (-level) + "}$");
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link = link.replace(re, function (trailingParens) {
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tail = trailingParens;
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return "";
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});
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}
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return "<" + protocol + link + ">" + tail;
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}
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function _DoAutoLinks(text) {
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// note that at this point, all other URL in the text are already hyperlinked as <a href=""></a>
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// *except* for the <http://www.foo.com> case
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// automatically add < and > around unadorned raw hyperlinks
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// must be preceded by space/BOF and followed by non-word/EOF character
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text = text.replace(/(^|\s)(https?|ftp)(:\/\/[-A-Z0-9+&@#\/%?=~_|\[\]\(\)!:,\.;]*[-A-Z0-9+&@#\/%=~_|\[\]\)])($|\W)/gi, "$1<$2$3>$4");
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// must be preceded by a non-word character (and not by =" or <) and followed by non-word/EOF character
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// simulating the lookbehind in a consuming way is okay here, since a URL can neither and with a " nor
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// with a <, so there is no risk of overlapping matches.
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text = text.replace(/(="|<)?\b(https?|ftp)(:\/\/[-A-Z0-9+&@#\/%?=~_|\[\]\(\)!:,\.;]*[-A-Z0-9+&@#\/%=~_|\[\])])(?=$|\W)/gi, handleTrailingParens);
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// autolink anything like <http://example.com>
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var replacer = function (wholematch, m1) {
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m1encoded = m1.replace(/\_\_/, '%5F%5F');
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return "<a href=\"" + m1encoded + "\">" + pluginHooks.plainLinkText(m1) + "</a>";
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m1encoded = m1.replace(/\_\_/, '%5F%5F');
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return "<a href=\"" + m1encoded + "\">" + pluginHooks.plainLinkText(m1) + "</a>";
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}
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text = text.replace(/<((https?|ftp):[^'">\s]+)>/gi, replacer);
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// Email addresses: <address@domain.foo>
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/*
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text = text.replace(/
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<
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(?:mailto:)?
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(
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[-.\w]+
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\@
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[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
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)
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>
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/gi, _DoAutoLinks_callback());
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*/
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/* disabling email autolinking, since we don't do that on the server, either
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text = text.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,
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function(wholeMatch,m1) {
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return _EncodeEmailAddress( _UnescapeSpecialChars(m1) );
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}
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);
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*/
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return text;
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}
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