mirror of
https://github.com/codeninjasllc/discourse.git
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1382 lines
52 KiB
JavaScript
1382 lines
52 KiB
JavaScript
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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Markdown = exports;
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else
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Markdown = {};
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// The following text is included for historical reasons, but should
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// be taken with a pinch of salt; it's not all true anymore.
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//
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// Wherever possible, Showdown is a straight, line-by-line port
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// of the Perl version of Markdown.
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//
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// This is not a normal parser design; it's basically just a
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// series of string substitutions. It's hard to read and
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// maintain this way, but keeping Showdown close to the original
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// design makes it easier to port new features.
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//
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// More importantly, Showdown behaves like markdown.pl in most
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// edge cases. So web applications can do client-side preview
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// in Javascript, and then build identical HTML on the server.
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//
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// This port needs the new RegExp functionality of ECMA 262,
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// 3rd Edition (i.e. Javascript 1.5). Most modern web browsers
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// should do fine. Even with the new regular expression features,
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// We do a lot of work to emulate Perl's regex functionality.
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// The tricky changes in this file mostly have the "attacklab:"
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// label. Major or self-explanatory changes don't.
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//
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// Smart diff tools like Araxis Merge will be able to match up
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// this file with markdown.pl in a useful way. A little tweaking
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// helps: in a copy of markdown.pl, replace "#" with "//" and
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// replace "$text" with "text". Be sure to ignore whitespace
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// and line endings.
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//
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//
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// Usage:
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//
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// var text = "Markdown *rocks*.";
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//
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// var converter = new Markdown.Converter();
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// var html = converter.makeHtml(text);
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//
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// alert(html);
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//
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// Note: move the sample code to the bottom of this
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// file before uncommenting it.
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//
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(function () {
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function identity(x) { return x; }
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function returnFalse(x) { return false; }
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function HookCollection() { }
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HookCollection.prototype = {
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chain: function (hookname, func) {
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var original = this[hookname];
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if (!original)
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throw new Error("unknown hook " + hookname);
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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 (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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throw new Error("unknown hook " + hookname);
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this[hookname] = func;
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},
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addNoop: function (hookname) {
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this[hookname] = identity;
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},
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addFalse: function (hookname) {
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this[hookname] = returnFalse;
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}
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};
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Markdown.HookCollection = HookCollection;
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// g_urls and g_titles allow arbitrary user-entered strings as keys. This
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// caused an exception (and hence stopped the rendering) when the user entered
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// e.g. [push] or [__proto__]. Adding a prefix to the actual key prevents this
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// (since no builtin property starts with "s_"). See
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// http://meta.stackoverflow.com/questions/64655/strange-wmd-bug
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// (granted, switching from Array() to Object() alone would have left only __proto__
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// to be a problem)
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function SaveHash() { }
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SaveHash.prototype = {
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set: function (key, value) {
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this["s_" + key] = value;
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},
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get: function (key) {
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return this["s_" + key];
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}
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};
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Markdown.Converter = function () {
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var pluginHooks = this.hooks = new HookCollection();
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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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//
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// Global hashes, used by various utility routines
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var g_urls;
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var g_titles;
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var g_html_blocks;
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// Used to track when we're inside an ordered or unordered list
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// (see _ProcessListItems() for details):
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var g_list_level;
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this.makeHtml = function (text) {
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//
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// Main function. The order in which other subs are called here is
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// essential. Link and image substitutions need to happen before
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// _EscapeSpecialCharsWithinTagAttributes(), so that any *'s or _'s in the <a>
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// and <img> tags get encoded.
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//
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// This will only happen if makeHtml on the same converter instance is called from a plugin hook.
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// Don't do that.
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if (g_urls)
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throw new Error("Recursive call to converter.makeHtml");
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// Create the private state objects.
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g_urls = new SaveHash();
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g_titles = new SaveHash();
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g_html_blocks = [];
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g_list_level = 0;
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text = pluginHooks.preConversion(text);
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// attacklab: Replace ~ with ~T
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// This lets us use tilde as an escape char to avoid md5 hashes
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// The choice of character is arbitray; anything that isn't
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// magic in Markdown will work.
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text = text.replace(/~/g, "~T");
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// attacklab: Replace $ with ~D
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// RegExp interprets $ as a special character
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// when it's in a replacement string
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text = text.replace(/\$/g, "~D");
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// Standardize line endings
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text = text.replace(/\r\n/g, "\n"); // DOS to Unix
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text = text.replace(/\r/g, "\n"); // Mac to Unix
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// Make sure text begins and ends with a couple of newlines:
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text = "\n\n" + text + "\n\n";
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// Convert all tabs to spaces.
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text = _Detab(text);
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// Strip any lines consisting only of spaces and tabs.
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// This makes subsequent regexen easier to write, because we can
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// match consecutive blank lines with /\n+/ instead of something
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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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// Strip link definitions, store in hashes.
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text = _StripLinkDefinitions(text);
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text = _RunBlockGamut(text);
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text = _UnescapeSpecialChars(text);
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// attacklab: Restore dollar signs
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text = text.replace(/~D/g, "$$");
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// attacklab: Restore tildes
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text = text.replace(/~T/g, "~");
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text = pluginHooks.postConversion(text);
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g_html_blocks = g_titles = g_urls = null;
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return text;
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};
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function _StripLinkDefinitions(text) {
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//
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// Strips link definitions from text, stores the URLs and titles in
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// hash references.
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//
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// Link defs are in the form: ^[id]: url "optional title"
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/*
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text = text.replace(/
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^[ ]{0,3}\[(.+)\]: // id = $1 attacklab: g_tab_width - 1
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[ \t]*
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\n? // maybe *one* newline
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[ \t]*
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<?(\S+?)>? // url = $2
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(?=\s|$) // lookahead for whitespace instead of the lookbehind removed below
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[ \t]*
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\n? // maybe one newline
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[ \t]*
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( // (potential) title = $3
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(\n*) // any lines skipped = $4 attacklab: lookbehind removed
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[ \t]+
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["(]
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(.+?) // title = $5
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[")]
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[ \t]*
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)? // title is optional
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(?:\n+|$)
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/gm, function(){...});
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*/
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text = text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?(?=\s|$)[ \t]*\n?[ \t]*((\n*)["(](.+?)[")][ \t]*)?(?:\n+)/gm,
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function (wholeMatch, m1, m2, m3, m4, m5) {
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m1 = m1.toLowerCase();
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g_urls.set(m1, _EncodeAmpsAndAngles(m2)); // Link IDs are case-insensitive
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if (m4) {
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// Oops, found blank lines, so it's not a title.
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// Put back the parenthetical statement we stole.
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return m3;
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} else if (m5) {
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g_titles.set(m1, m5.replace(/"/g, """));
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}
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// Completely remove the definition from the text
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return "";
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}
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);
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return text;
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}
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function _HashHTMLBlocks(text) {
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// Hashify HTML blocks:
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// We only want to do this for block-level HTML tags, such as headers,
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// lists, and tables. That's because we still want to wrap <p>s around
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// "paragraphs" that are wrapped in non-block-level tags, such as anchors,
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// phrase emphasis, and spans. The list of tags we're looking for is
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// hard-coded:
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var block_tags_a = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del"
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var block_tags_b = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math"
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// First, look for nested blocks, e.g.:
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// <div>
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// <div>
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// tags for inner block must be indented.
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// </div>
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// </div>
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//
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// The outermost tags must start at the left margin for this to match, and
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// the inner nested divs must be indented.
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// We need to do this before the next, more liberal match, because the next
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// match will start at the first `<div>` and stop at the first `</div>`.
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// attacklab: This regex can be expensive when it fails.
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/*
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text = text.replace(/
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( // save in $1
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^ // start of line (with /m)
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<($block_tags_a) // start tag = $2
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\b // word break
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// attacklab: hack around khtml/pcre bug...
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[^\r]*?\n // any number of lines, minimally matching
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</\2> // the matching end tag
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[ \t]* // trailing spaces/tabs
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(?=\n+) // followed by a newline
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) // attacklab: there are sentinel newlines at end of document
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/gm,function(){...}};
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*/
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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);
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//
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// Now match more liberally, simply from `\n<tag>` to `</tag>\n`
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//
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/*
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text = text.replace(/
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( // save in $1
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^ // start of line (with /m)
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<($block_tags_b) // start tag = $2
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\b // word break
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// attacklab: hack around khtml/pcre bug...
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[^\r]*? // any number of lines, minimally matching
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.*</\2> // the matching end tag
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[ \t]* // trailing spaces/tabs
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(?=\n+) // followed by a newline
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) // attacklab: there are sentinel newlines at end of document
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/gm,function(){...}};
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*/
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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);
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// Special case just for <hr />. It was easier to make a special case than
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// to make the other regex more complicated.
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/*
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text = text.replace(/
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\n // Starting after a blank line
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[ ]{0,3}
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( // save in $1
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(<(hr) // start tag = $2
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\b // word break
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([^<>])*?
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\/?>) // the matching end tag
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[ \t]*
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(?=\n{2,}) // followed by a blank line
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)
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/g,hashElement);
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*/
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text = text.replace(/\n[ ]{0,3}((<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g, hashElement);
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// Special case for standalone HTML comments:
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/*
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text = text.replace(/
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\n\n // Starting after a blank line
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[ ]{0,3} // attacklab: g_tab_width - 1
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( // save in $1
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<!
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(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--) // see http://www.w3.org/TR/html-markup/syntax.html#comments and http://meta.stackoverflow.com/q/95256
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>
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[ \t]*
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(?=\n{2,}) // followed by a blank line
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)
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/g,hashElement);
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*/
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text = text.replace(/\n\n[ ]{0,3}(<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>[ \t]*(?=\n{2,}))/g, hashElement);
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// PHP and ASP-style processor instructions (<?...?> and <%...%>)
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/*
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text = text.replace(/
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(?:
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\n\n // Starting after a blank line
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)
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( // save in $1
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[ ]{0,3} // attacklab: g_tab_width - 1
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(?:
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<([?%]) // $2
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[^\r]*?
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\2>
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)
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[ \t]*
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(?=\n{2,}) // followed by a blank line
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)
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/g,hashElement);
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*/
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text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g, hashElement);
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return text;
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}
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function hashElement(wholeMatch, m1) {
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var blockText = m1;
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// Undo double lines
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blockText = blockText.replace(/^\n+/, "");
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// strip trailing blank lines
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blockText = blockText.replace(/\n+$/g, "");
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// Replace the element text with a marker ("~KxK" where x is its key)
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blockText = "\n\n~K" + (g_html_blocks.push(blockText) - 1) + "K\n\n";
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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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var replacement = "<hr />\n";
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text = text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm, replacement);
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text = text.replace(/^[ ]{0,2}([ ]?-[ ]?){3,}[ \t]*$/gm, replacement);
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text = text.replace(/^[ ]{0,2}([ ]?_[ ]?){3,}[ \t]*$/gm, replacement);
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text = _DoLists(text);
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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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// <p> tags around block-level tags.
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text = _HashHTMLBlocks(text);
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text = _FormParagraphs(text, doNotUnhash);
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return text;
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}
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function _RunSpanGamut(text) {
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//
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// These are all the transformations that occur *within* block-level
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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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// Process anchor and image tags. Images must come first,
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// because ![foo][f] looks like an anchor.
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text = _DoImages(text);
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text = _DoAnchors(text);
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// Make links out of things like `<http://example.com/>`
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// Must come after _DoAnchors(), because you can use < and >
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// delimiters in inline links like [this](<url>).
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text = _DoAutoLinks(text);
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text = text.replace(/~P/g, "://"); // put in place to prevent autolinking; reset now
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text = _EncodeAmpsAndAngles(text);
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text = _DoItalicsAndBold(text);
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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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function _EscapeSpecialCharsWithinTagAttributes(text) {
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//
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// Within tags -- meaning between < and > -- encode [\ ` * _] so they
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// don't conflict with their use in Markdown for code, italics and strong.
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//
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// Build a regex to find HTML tags and comments. See Friedl's
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// "Mastering Regular Expressions", 2nd Ed., pp. 200-201.
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// SE: changed the comment part of the regex
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var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>)/gi;
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text = text.replace(regex, function (wholeMatch) {
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var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g, "$1`");
|
|
tag = escapeCharacters(tag, wholeMatch.charAt(1) == "!" ? "\\`*_/" : "\\`*_"); // also escape slashes in comments to prevent autolinking there -- http://meta.stackoverflow.com/questions/95987
|
|
return tag;
|
|
});
|
|
|
|
return text;
|
|
}
|
|
|
|
function _DoAnchors(text) {
|
|
//
|
|
// Turn Markdown link shortcuts into XHTML <a> tags.
|
|
//
|
|
//
|
|
// First, handle reference-style links: [link text] [id]
|
|
//
|
|
|
|
/*
|
|
text = text.replace(/
|
|
( // wrap whole match in $1
|
|
\[
|
|
(
|
|
(?:
|
|
\[[^\]]*\] // allow brackets nested one level
|
|
|
|
|
[^\[] // or anything else
|
|
)*
|
|
)
|
|
\]
|
|
|
|
[ ]? // one optional space
|
|
(?:\n[ ]*)? // one optional newline followed by spaces
|
|
|
|
\[
|
|
(.*?) // id = $3
|
|
\]
|
|
)
|
|
()()()() // pad remaining backreferences
|
|
/g, writeAnchorTag);
|
|
*/
|
|
text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g, writeAnchorTag);
|
|
|
|
//
|
|
// Next, inline-style links: [link text](url "optional title")
|
|
//
|
|
|
|
/*
|
|
text = text.replace(/
|
|
( // wrap whole match in $1
|
|
\[
|
|
(
|
|
(?:
|
|
\[[^\]]*\] // allow brackets nested one level
|
|
|
|
|
[^\[\]] // or anything else
|
|
)*
|
|
)
|
|
\]
|
|
\( // literal paren
|
|
[ \t]*
|
|
() // no id, so leave $3 empty
|
|
<?( // href = $4
|
|
(?:
|
|
\([^)]*\) // allow one level of (correctly nested) parens (think MSDN)
|
|
|
|
|
[^()\s]
|
|
)*?
|
|
)>?
|
|
[ \t]*
|
|
( // $5
|
|
(['"]) // quote char = $6
|
|
(.*?) // Title = $7
|
|
\6 // matching quote
|
|
[ \t]* // ignore any spaces/tabs between closing quote and )
|
|
)? // title is optional
|
|
\)
|
|
)
|
|
/g, writeAnchorTag);
|
|
*/
|
|
|
|
text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?((?:\([^)]*\)|[^()\s])*?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g, writeAnchorTag);
|
|
|
|
//
|
|
// Last, handle reference-style shortcuts: [link text]
|
|
// These must come last in case you've also got [link test][1]
|
|
// or [link test](/foo)
|
|
//
|
|
|
|
/*
|
|
text = text.replace(/
|
|
( // wrap whole match in $1
|
|
\[
|
|
([^\[\]]+) // link text = $2; can't contain '[' or ']'
|
|
\]
|
|
)
|
|
()()()()() // pad rest of backreferences
|
|
/g, writeAnchorTag);
|
|
*/
|
|
text = text.replace(/(\[([^\[\]]+)\])()()()()()/g, writeAnchorTag);
|
|
|
|
return text;
|
|
}
|
|
|
|
function writeAnchorTag(wholeMatch, m1, m2, m3, m4, m5, m6, m7) {
|
|
if (m7 == undefined) m7 = "";
|
|
var whole_match = m1;
|
|
var link_text = m2.replace(/:\/\//g, "~P"); // to prevent auto-linking withing the link. will be converted back after the auto-linker runs
|
|
var link_id = m3.toLowerCase();
|
|
var url = m4;
|
|
var title = m7;
|
|
|
|
if (url == "") {
|
|
if (link_id == "") {
|
|
// lower-case and turn embedded newlines into spaces
|
|
link_id = link_text.toLowerCase().replace(/ ?\n/g, " ");
|
|
}
|
|
url = "#" + link_id;
|
|
|
|
if (g_urls.get(link_id) != undefined) {
|
|
url = g_urls.get(link_id);
|
|
if (g_titles.get(link_id) != undefined) {
|
|
title = g_titles.get(link_id);
|
|
}
|
|
}
|
|
else {
|
|
if (whole_match.search(/\(\s*\)$/m) > -1) {
|
|
// Special case for explicit empty url
|
|
url = "";
|
|
} else {
|
|
return whole_match;
|
|
}
|
|
}
|
|
}
|
|
url = encodeProblemUrlChars(url);
|
|
url = escapeCharacters(url, "*_");
|
|
var result = "<a href=\"" + url + "\"";
|
|
|
|
if (title != "") {
|
|
title = attributeEncode(title);
|
|
title = escapeCharacters(title, "*_");
|
|
result += " title=\"" + title + "\"";
|
|
}
|
|
|
|
result += ">" + link_text + "</a>";
|
|
|
|
return result;
|
|
}
|
|
|
|
function _DoImages(text) {
|
|
//
|
|
// Turn Markdown image shortcuts into <img> tags.
|
|
//
|
|
|
|
//
|
|
// First, handle reference-style labeled images: ![alt text][id]
|
|
//
|
|
|
|
/*
|
|
text = text.replace(/
|
|
( // wrap whole match in $1
|
|
!\[
|
|
(.*?) // alt text = $2
|
|
\]
|
|
|
|
[ ]? // one optional space
|
|
(?:\n[ ]*)? // one optional newline followed by spaces
|
|
|
|
\[
|
|
(.*?) // id = $3
|
|
\]
|
|
)
|
|
()()()() // pad rest of backreferences
|
|
/g, writeImageTag);
|
|
*/
|
|
text = text.replace(/(!\[(.*?)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g, writeImageTag);
|
|
|
|
//
|
|
// Next, handle inline images: 
|
|
// Don't forget: encode * and _
|
|
|
|
/*
|
|
text = text.replace(/
|
|
( // wrap whole match in $1
|
|
!\[
|
|
(.*?) // alt text = $2
|
|
\]
|
|
\s? // One optional whitespace character
|
|
\( // literal paren
|
|
[ \t]*
|
|
() // no id, so leave $3 empty
|
|
<?(\S+?)>? // src url = $4
|
|
[ \t]*
|
|
( // $5
|
|
(['"]) // quote char = $6
|
|
(.*?) // title = $7
|
|
\6 // matching quote
|
|
[ \t]*
|
|
)? // title is optional
|
|
\)
|
|
)
|
|
/g, writeImageTag);
|
|
*/
|
|
text = text.replace(/(!\[(.*?)\]\s?\([ \t]*()<?(\S+?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g, writeImageTag);
|
|
|
|
return text;
|
|
}
|
|
|
|
function attributeEncode(text) {
|
|
// unconditionally replace angle brackets here -- what ends up in an attribute (e.g. alt or title)
|
|
// never makes sense to have verbatim HTML in it (and the sanitizer would totally break it)
|
|
return text.replace(/>/g, ">").replace(/</g, "<").replace(/"/g, """);
|
|
}
|
|
|
|
function writeImageTag(wholeMatch, m1, m2, m3, m4, m5, m6, m7) {
|
|
var whole_match = m1;
|
|
var alt_text = m2;
|
|
var link_id = m3.toLowerCase();
|
|
var url = m4;
|
|
var title = m7;
|
|
|
|
if (!title) title = "";
|
|
|
|
if (url == "") {
|
|
if (link_id == "") {
|
|
// lower-case and turn embedded newlines into spaces
|
|
link_id = alt_text.toLowerCase().replace(/ ?\n/g, " ");
|
|
}
|
|
url = "#" + link_id;
|
|
|
|
if (g_urls.get(link_id) != undefined) {
|
|
url = g_urls.get(link_id);
|
|
if (g_titles.get(link_id) != undefined) {
|
|
title = g_titles.get(link_id);
|
|
}
|
|
}
|
|
else {
|
|
return whole_match;
|
|
}
|
|
}
|
|
|
|
alt_text = escapeCharacters(attributeEncode(alt_text), "*_[]()");
|
|
url = escapeCharacters(url, "*_");
|
|
var result = "<img src=\"" + url + "\" alt=\"" + alt_text + "\"";
|
|
|
|
// attacklab: Markdown.pl adds empty title attributes to images.
|
|
// Replicate this bug.
|
|
|
|
//if (title != "") {
|
|
title = attributeEncode(title);
|
|
title = escapeCharacters(title, "*_");
|
|
result += " title=\"" + title + "\"";
|
|
//}
|
|
|
|
result += " />";
|
|
|
|
return result;
|
|
}
|
|
|
|
function _DoHeaders(text) {
|
|
|
|
// Setext-style headers:
|
|
// Header 1
|
|
// ========
|
|
//
|
|
// Header 2
|
|
// --------
|
|
//
|
|
text = text.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm,
|
|
function (wholeMatch, m1) { return "<h1>" + _RunSpanGamut(m1) + "</h1>\n\n"; }
|
|
);
|
|
|
|
text = text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm,
|
|
function (matchFound, m1) { return "<h2>" + _RunSpanGamut(m1) + "</h2>\n\n"; }
|
|
);
|
|
|
|
// atx-style headers:
|
|
// # Header 1
|
|
// ## Header 2
|
|
// ## Header 2 with closing hashes ##
|
|
// ...
|
|
// ###### Header 6
|
|
//
|
|
|
|
/*
|
|
text = text.replace(/
|
|
^(\#{1,6}) // $1 = string of #'s
|
|
[ \t]*
|
|
(.+?) // $2 = Header text
|
|
[ \t]*
|
|
\#* // optional closing #'s (not counted)
|
|
\n+
|
|
/gm, function() {...});
|
|
*/
|
|
|
|
text = text.replace(/^(\#{1,6})[ \t]*(.+?)[ \t]*\#*\n+/gm,
|
|
function (wholeMatch, m1, m2) {
|
|
var h_level = m1.length;
|
|
return "<h" + h_level + ">" + _RunSpanGamut(m2) + "</h" + h_level + ">\n\n";
|
|
}
|
|
);
|
|
|
|
return text;
|
|
}
|
|
|
|
function _DoLists(text) {
|
|
//
|
|
// Form HTML ordered (numbered) and unordered (bulleted) lists.
|
|
//
|
|
|
|
// attacklab: add sentinel to hack around khtml/safari bug:
|
|
// http://bugs.webkit.org/show_bug.cgi?id=11231
|
|
text += "~0";
|
|
|
|
// Re-usable pattern to match any entirel ul or ol list:
|
|
|
|
/*
|
|
var whole_list = /
|
|
( // $1 = whole list
|
|
( // $2
|
|
[ ]{0,3} // attacklab: g_tab_width - 1
|
|
([*+-]|\d+[.]) // $3 = first list item marker
|
|
[ \t]+
|
|
)
|
|
[^\r]+?
|
|
( // $4
|
|
~0 // sentinel for workaround; should be $
|
|
|
|
|
\n{2,}
|
|
(?=\S)
|
|
(?! // Negative lookahead for another list item marker
|
|
[ \t]*
|
|
(?:[*+-]|\d+[.])[ \t]+
|
|
)
|
|
)
|
|
)
|
|
/g
|
|
*/
|
|
var whole_list = /^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;
|
|
|
|
if (g_list_level) {
|
|
text = text.replace(whole_list, function (wholeMatch, m1, m2) {
|
|
var list = m1;
|
|
var list_type = (m2.search(/[*+-]/g) > -1) ? "ul" : "ol";
|
|
|
|
var result = _ProcessListItems(list, list_type);
|
|
|
|
// Trim any trailing whitespace, to put the closing `</$list_type>`
|
|
// up on the preceding line, to get it past the current stupid
|
|
// HTML block parser. This is a hack to work around the terrible
|
|
// hack that is the HTML block parser.
|
|
result = result.replace(/\s+$/, "");
|
|
result = "<" + list_type + ">" + result + "</" + list_type + ">\n";
|
|
return result;
|
|
});
|
|
} else {
|
|
whole_list = /(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g;
|
|
text = text.replace(whole_list, function (wholeMatch, m1, m2, m3) {
|
|
var runup = m1;
|
|
var list = m2;
|
|
|
|
var list_type = (m3.search(/[*+-]/g) > -1) ? "ul" : "ol";
|
|
var result = _ProcessListItems(list, list_type);
|
|
result = runup + "<" + list_type + ">\n" + result + "</" + list_type + ">\n";
|
|
return result;
|
|
});
|
|
}
|
|
|
|
// attacklab: strip sentinel
|
|
text = text.replace(/~0/, "");
|
|
|
|
return text;
|
|
}
|
|
|
|
var _listItemMarkers = { ol: "\\d+[.]", ul: "[*+-]" };
|
|
|
|
function _ProcessListItems(list_str, list_type) {
|
|
//
|
|
// Process the contents of a single ordered or unordered list, splitting it
|
|
// into individual list items.
|
|
//
|
|
// list_type is either "ul" or "ol".
|
|
|
|
// The $g_list_level global keeps track of when we're inside a list.
|
|
// Each time we enter a list, we increment it; when we leave a list,
|
|
// we decrement. If it's zero, we're not in a list anymore.
|
|
//
|
|
// We do this because when we're not inside a list, we want to treat
|
|
// something like this:
|
|
//
|
|
// I recommend upgrading to version
|
|
// 8. Oops, now this line is treated
|
|
// as a sub-list.
|
|
//
|
|
// As a single paragraph, despite the fact that the second line starts
|
|
// with a digit-period-space sequence.
|
|
//
|
|
// Whereas when we're inside a list (or sub-list), that line will be
|
|
// treated as the start of a sub-list. What a kludge, huh? This is
|
|
// an aspect of Markdown's syntax that's hard to parse perfectly
|
|
// without resorting to mind-reading. Perhaps the solution is to
|
|
// change the syntax rules such that sub-lists must start with a
|
|
// starting cardinal number; e.g. "1." or "a.".
|
|
|
|
g_list_level++;
|
|
|
|
// trim trailing blank lines:
|
|
list_str = list_str.replace(/\n{2,}$/, "\n");
|
|
|
|
// attacklab: add sentinel to emulate \z
|
|
list_str += "~0";
|
|
|
|
// In the original attacklab showdown, list_type was not given to this function, and anything
|
|
// that matched /[*+-]|\d+[.]/ would just create the next <li>, causing this mismatch:
|
|
//
|
|
// Markdown rendered by WMD rendered by MarkdownSharp
|
|
// ------------------------------------------------------------------
|
|
// 1. first 1. first 1. first
|
|
// 2. second 2. second 2. second
|
|
// - third 3. third * third
|
|
//
|
|
// We changed this to behave identical to MarkdownSharp. This is the constructed RegEx,
|
|
// with {MARKER} being one of \d+[.] or [*+-], depending on list_type:
|
|
|
|
/*
|
|
list_str = list_str.replace(/
|
|
(^[ \t]*) // leading whitespace = $1
|
|
({MARKER}) [ \t]+ // list marker = $2
|
|
([^\r]+? // list item text = $3
|
|
(\n+)
|
|
)
|
|
(?=
|
|
(~0 | \2 ({MARKER}) [ \t]+)
|
|
)
|
|
/gm, function(){...});
|
|
*/
|
|
|
|
var marker = _listItemMarkers[list_type];
|
|
var re = new RegExp("(^[ \\t]*)(" + marker + ")[ \\t]+([^\\r]+?(\\n+))(?=(~0|\\1(" + marker + ")[ \\t]+))", "gm");
|
|
var last_item_had_a_double_newline = false;
|
|
list_str = list_str.replace(re,
|
|
function (wholeMatch, m1, m2, m3) {
|
|
var item = m3;
|
|
var leading_space = m1;
|
|
var ends_with_double_newline = /\n\n$/.test(item);
|
|
var contains_double_newline = ends_with_double_newline || item.search(/\n{2,}/) > -1;
|
|
|
|
if (contains_double_newline || last_item_had_a_double_newline) {
|
|
item = _RunBlockGamut(_Outdent(item), /* doNotUnhash = */true);
|
|
}
|
|
else {
|
|
// Recursion for sub-lists:
|
|
item = _DoLists(_Outdent(item));
|
|
item = item.replace(/\n$/, ""); // chomp(item)
|
|
item = _RunSpanGamut(item);
|
|
}
|
|
last_item_had_a_double_newline = ends_with_double_newline;
|
|
return "<li>" + item + "</li>\n";
|
|
}
|
|
);
|
|
|
|
// attacklab: strip sentinel
|
|
list_str = list_str.replace(/~0/g, "");
|
|
|
|
g_list_level--;
|
|
return list_str;
|
|
}
|
|
|
|
function _DoCodeBlocks(text) {
|
|
//
|
|
// Process Markdown `<pre><code>` blocks.
|
|
//
|
|
|
|
/*
|
|
text = text.replace(/
|
|
(?:\n\n|^)
|
|
( // $1 = the code block -- one or more lines, starting with a space/tab
|
|
(?:
|
|
(?:[ ]{4}|\t) // Lines must start with a tab or a tab-width of spaces - attacklab: g_tab_width
|
|
.*\n+
|
|
)+
|
|
)
|
|
(\n*[ ]{0,3}[^ \t\n]|(?=~0)) // attacklab: g_tab_width
|
|
/g ,function(){...});
|
|
*/
|
|
|
|
// attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
|
|
text += "~0";
|
|
|
|
text = text.replace(/(?:\n\n|^\n?)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g,
|
|
function (wholeMatch, m1, m2) {
|
|
var codeblock = m1;
|
|
var nextChar = m2;
|
|
|
|
codeblock = _EncodeCode(_Outdent(codeblock));
|
|
codeblock = _Detab(codeblock);
|
|
codeblock = codeblock.replace(/^\n+/g, ""); // trim leading newlines
|
|
codeblock = codeblock.replace(/\n+$/g, ""); // trim trailing whitespace
|
|
|
|
codeblock = "<pre><code>" + codeblock + "\n</code></pre>";
|
|
|
|
return "\n\n" + codeblock + "\n\n" + nextChar;
|
|
}
|
|
);
|
|
|
|
// attacklab: strip sentinel
|
|
text = text.replace(/~0/, "");
|
|
|
|
return text;
|
|
}
|
|
|
|
function hashBlock(text) {
|
|
text = text.replace(/(^\n+|\n+$)/g, "");
|
|
return "\n\n~K" + (g_html_blocks.push(text) - 1) + "K\n\n";
|
|
}
|
|
|
|
function _DoCodeSpans(text) {
|
|
//
|
|
// * Backtick quotes are used for <code></code> spans.
|
|
//
|
|
// * You can use multiple backticks as the delimiters if you want to
|
|
// include literal backticks in the code span. So, this input:
|
|
//
|
|
// Just type ``foo `bar` baz`` at the prompt.
|
|
//
|
|
// Will translate to:
|
|
//
|
|
// <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
|
|
//
|
|
// There's no arbitrary limit to the number of backticks you
|
|
// can use as delimters. If you need three consecutive backticks
|
|
// in your code, use four for delimiters, etc.
|
|
//
|
|
// * You can use spaces to get literal backticks at the edges:
|
|
//
|
|
// ... type `` `bar` `` ...
|
|
//
|
|
// Turns to:
|
|
//
|
|
// ... type <code>`bar`</code> ...
|
|
//
|
|
|
|
/*
|
|
text = text.replace(/
|
|
(^|[^\\]) // Character before opening ` can't be a backslash
|
|
(`+) // $2 = Opening run of `
|
|
( // $3 = The code block
|
|
[^\r]*?
|
|
[^`] // attacklab: work around lack of lookbehind
|
|
)
|
|
\2 // Matching closer
|
|
(?!`)
|
|
/gm, function(){...});
|
|
*/
|
|
|
|
text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,
|
|
function (wholeMatch, m1, m2, m3, m4) {
|
|
var c = m3;
|
|
c = c.replace(/^([ \t]*)/g, ""); // leading whitespace
|
|
c = c.replace(/[ \t]*$/g, ""); // trailing whitespace
|
|
c = _EncodeCode(c);
|
|
c = c.replace(/:\/\//g, "~P"); // to prevent auto-linking. Not necessary in code *blocks*, but in code spans. Will be converted back after the auto-linker runs.
|
|
return m1 + "<code>" + c + "</code>";
|
|
}
|
|
);
|
|
|
|
return text;
|
|
}
|
|
|
|
function _EncodeCode(text) {
|
|
//
|
|
// Encode/escape certain characters inside Markdown code runs.
|
|
// The point is that in code, these characters are literals,
|
|
// and lose their special Markdown meanings.
|
|
//
|
|
// Encode all ampersands; HTML entities are not
|
|
// entities within a Markdown code span.
|
|
text = text.replace(/&/g, "&");
|
|
|
|
// 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;
|
|
}
|
|
|
|
function _DoItalicsAndBold(text) {
|
|
|
|
// <strong> must go first:
|
|
text = text.replace(/([\W_]|^)(\*\*|__)(?=\S)([^\r]*?\S[\*_]*)\2([\W_]|$)/g,
|
|
"$1<strong>$3</strong>$4");
|
|
|
|
text = text.replace(/([\W_]|^)(\*|_)(?=\S)([^\r\*_]*?\S)\2([\W_]|$)/g,
|
|
"$1<em>$3</em>$4");
|
|
|
|
return text;
|
|
}
|
|
|
|
function _DoBlockQuotes(text) {
|
|
|
|
/*
|
|
text = text.replace(/
|
|
( // Wrap whole match in $1
|
|
(
|
|
^[ \t]*>[ \t]? // '>' at the start of a line
|
|
.+\n // rest of the first line
|
|
(.+\n)* // subsequent consecutive lines
|
|
\n* // blanks
|
|
)+
|
|
)
|
|
/gm, function(){...});
|
|
*/
|
|
|
|
text = text.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm,
|
|
function (wholeMatch, m1) {
|
|
var bq = m1;
|
|
|
|
// attacklab: hack around Konqueror 3.5.4 bug:
|
|
// "----------bug".replace(/^-/g,"") == "bug"
|
|
|
|
bq = bq.replace(/^[ \t]*>[ \t]?/gm, "~0"); // trim one level of quoting
|
|
|
|
// attacklab: clean up hack
|
|
bq = bq.replace(/~0/g, "");
|
|
|
|
bq = bq.replace(/^[ \t]+$/gm, ""); // trim whitespace-only lines
|
|
bq = _RunBlockGamut(bq); // recurse
|
|
|
|
bq = bq.replace(/(^|\n)/g, "$1 ");
|
|
// These leading spaces screw with <pre> content, so we need to fix that:
|
|
bq = bq.replace(
|
|
/(\s*<pre>[^\r]+?<\/pre>)/gm,
|
|
function (wholeMatch, m1) {
|
|
var pre = m1;
|
|
// attacklab: hack around Konqueror 3.5.4 bug:
|
|
pre = pre.replace(/^ /mg, "~0");
|
|
pre = pre.replace(/~0/g, "");
|
|
return pre;
|
|
});
|
|
|
|
return hashBlock("<blockquote>\n" + bq + "\n</blockquote>");
|
|
}
|
|
);
|
|
return text;
|
|
}
|
|
|
|
function _FormParagraphs(text, doNotUnhash) {
|
|
//
|
|
// Params:
|
|
// $text - string to process with html <p> tags
|
|
//
|
|
|
|
// Strip leading and trailing lines:
|
|
text = text.replace(/^\n+/g, "");
|
|
text = text.replace(/\n+$/g, "");
|
|
|
|
var grafs = text.split(/\n{2,}/g);
|
|
var grafsOut = [];
|
|
|
|
var markerRe = /~K(\d+)K/;
|
|
|
|
//
|
|
// Wrap <p> tags.
|
|
//
|
|
var end = grafs.length;
|
|
for (var i = 0; i < end; i++) {
|
|
var str = grafs[i];
|
|
|
|
// if this is an HTML marker, copy it
|
|
if (markerRe.test(str)) {
|
|
grafsOut.push(str);
|
|
}
|
|
else if (/\S/.test(str)) {
|
|
str = _RunSpanGamut(str);
|
|
str = str.replace(/^([ \t]*)/g, "<p>");
|
|
str += "</p>"
|
|
grafsOut.push(str);
|
|
}
|
|
|
|
}
|
|
//
|
|
// Unhashify HTML blocks
|
|
//
|
|
if (!doNotUnhash) {
|
|
end = grafsOut.length;
|
|
for (var i = 0; i < end; i++) {
|
|
var foundAny = true;
|
|
while (foundAny) { // we may need several runs, since the data may be nested
|
|
foundAny = false;
|
|
grafsOut[i] = grafsOut[i].replace(/~K(\d+)K/g, function (wholeMatch, id) {
|
|
foundAny = true;
|
|
return g_html_blocks[id];
|
|
});
|
|
}
|
|
}
|
|
}
|
|
return grafsOut.join("\n\n");
|
|
}
|
|
|
|
function _EncodeAmpsAndAngles(text) {
|
|
// Smart processing for ampersands and angle brackets that need to be encoded.
|
|
|
|
// Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
|
|
// http://bumppo.net/projects/amputator/
|
|
text = text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g, "&");
|
|
|
|
// Encode naked <'s
|
|
text = text.replace(/<(?![a-z\/?\$!])/gi, "<");
|
|
|
|
return text;
|
|
}
|
|
|
|
function _EncodeBackslashEscapes(text) {
|
|
//
|
|
// Parameter: String.
|
|
// Returns: The string, with after processing the following backslash
|
|
// escape sequences.
|
|
//
|
|
|
|
// attacklab: The polite way to do this is with the new
|
|
// escapeCharacters() function:
|
|
//
|
|
// text = escapeCharacters(text,"\\",true);
|
|
// text = escapeCharacters(text,"`*_{}[]()>#+-.!",true);
|
|
//
|
|
// ...but we're sidestepping its use of the (slow) RegExp constructor
|
|
// as an optimization for Firefox. This function gets called a LOT.
|
|
|
|
text = text.replace(/\\(\\)/g, escapeCharacters_callback);
|
|
text = text.replace(/\\([`*_{}\[\]()>#+-.!])/g, escapeCharacters_callback);
|
|
return text;
|
|
}
|
|
|
|
function handleTrailingParens(wholeMatch, lookbehind, protocol, link) {
|
|
if (lookbehind)
|
|
return wholeMatch;
|
|
if (link.charAt(link.length - 1) !== ")")
|
|
return "<" + protocol + link + ">";
|
|
var parens = link.match(/[()]/g);
|
|
var level = 0;
|
|
for (var i = 0; i < parens.length; i++) {
|
|
if (parens[i] === "(") {
|
|
if (level <= 0)
|
|
level = 1;
|
|
else
|
|
level++;
|
|
}
|
|
else {
|
|
level--;
|
|
}
|
|
}
|
|
var tail = "";
|
|
if (level < 0) {
|
|
var re = new RegExp("\\){1," + (-level) + "}$");
|
|
link = link.replace(re, function (trailingParens) {
|
|
tail = trailingParens;
|
|
return "";
|
|
});
|
|
}
|
|
|
|
return "<" + protocol + link + ">" + tail;
|
|
}
|
|
|
|
function _DoAutoLinks(text) {
|
|
|
|
// note that at this point, all other URL in the text are already hyperlinked as <a href=""></a>
|
|
// *except* for the <http://www.foo.com> case
|
|
|
|
// automatically add < and > around unadorned raw hyperlinks
|
|
// must be preceded by a non-word character (and not by =" or <) and followed by non-word/EOF character
|
|
// simulating the lookbehind in a consuming way is okay here, since a URL can neither and with a " nor
|
|
// with a <, so there is no risk of overlapping matches.
|
|
text = text.replace(/(="|='|<)?\b(https?|ftp)(:\/\/[-A-Z0-9+&@#\/%?=~_|\[\]\(\)!:,\.;]*[-A-Z0-9+&@#\/%=~_|\[\])])(?=$|\W)/gi, handleTrailingParens);
|
|
|
|
// autolink anything like <http://example.com>
|
|
|
|
var replacer = function (wholematch, m1) {
|
|
var m1encoded = m1.replace(/\_\_/, '%5F%5F');
|
|
return "<a href=\"" + m1encoded + "\">" + pluginHooks.plainLinkText(m1) + "</a>";
|
|
}
|
|
text = text.replace(/<((https?|ftp):[^'">\s]+)>/gi, replacer);
|
|
|
|
return text;
|
|
}
|
|
|
|
function _UnescapeSpecialChars(text) {
|
|
//
|
|
// Swap back in all the special characters we've hidden.
|
|
//
|
|
text = text.replace(/~E(\d+)E/g,
|
|
function (wholeMatch, m1) {
|
|
var charCodeToReplace = parseInt(m1);
|
|
return String.fromCharCode(charCodeToReplace);
|
|
}
|
|
);
|
|
return text;
|
|
}
|
|
|
|
function _Outdent(text) {
|
|
//
|
|
// Remove one level of line-leading tabs or spaces
|
|
//
|
|
|
|
// attacklab: hack around Konqueror 3.5.4 bug:
|
|
// "----------bug".replace(/^-/g,"") == "bug"
|
|
|
|
text = text.replace(/^(\t|[ ]{1,4})/gm, "~0"); // attacklab: g_tab_width
|
|
|
|
// attacklab: clean up hack
|
|
text = text.replace(/~0/g, "")
|
|
|
|
return text;
|
|
}
|
|
|
|
function _Detab(text) {
|
|
if (!/\t/.test(text))
|
|
return text;
|
|
|
|
var spaces = [" ", " ", " ", " "],
|
|
skew = 0,
|
|
v;
|
|
|
|
return text.replace(/[\n\t]/g, function (match, offset) {
|
|
if (match === "\n") {
|
|
skew = offset + 1;
|
|
return match;
|
|
}
|
|
v = (offset - skew) % 4;
|
|
skew = offset + 1;
|
|
return spaces[v];
|
|
});
|
|
}
|
|
|
|
//
|
|
// attacklab: Utility functions
|
|
//
|
|
|
|
var _problemUrlChars = /(?:["'*()[\]:]|~D)/g;
|
|
|
|
// hex-encodes some unusual "problem" chars in URLs to avoid URL detection problems
|
|
function encodeProblemUrlChars(url) {
|
|
if (!url)
|
|
return "";
|
|
|
|
var len = url.length;
|
|
|
|
return url.replace(_problemUrlChars, function (match, offset) {
|
|
if (match == "~D") // escape for dollar
|
|
return "%24";
|
|
if (match == ":") {
|
|
if (offset == len - 1 || /[0-9\/]/.test(url.charAt(offset + 1)))
|
|
return ":"
|
|
}
|
|
return "%" + match.charCodeAt(0).toString(16);
|
|
});
|
|
}
|
|
|
|
|
|
function escapeCharacters(text, charsToEscape, afterBackslash) {
|
|
// First we have to escape the escape characters so that
|
|
// we can build a character class out of them
|
|
var regexString = "([" + charsToEscape.replace(/([\[\]\\])/g, "\\$1") + "])";
|
|
|
|
if (afterBackslash) {
|
|
regexString = "\\\\" + regexString;
|
|
}
|
|
|
|
var regex = new RegExp(regexString, "g");
|
|
text = text.replace(regex, escapeCharacters_callback);
|
|
|
|
return text;
|
|
}
|
|
|
|
|
|
function escapeCharacters_callback(wholeMatch, m1) {
|
|
var charCodeToEscape = m1.charCodeAt(0);
|
|
return "~E" + charCodeToEscape + "E";
|
|
}
|
|
|
|
}; // end of the Markdown.Converter constructor
|
|
|
|
})();
|