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1296 lines
33 KiB
JavaScript
1296 lines
33 KiB
JavaScript
//
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// showdown.js -- A javascript port of Markdown.
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//
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// Copyright (c) 2007 John Fraser.
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//
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// Original Markdown Copyright (c) 2004-2005 John Gruber
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// <http://daringfireball.net/projects/markdown/>
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//
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// Redistributable under a BSD-style open source license.
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// See license.txt for more information.
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//
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// The full source distribution is at:
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//
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// A A L
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// T C A
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// T K B
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//
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// <http://www.attacklab.net/>
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//
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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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// Showdown usage:
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//
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// var text = "Markdown *rocks*.";
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//
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// var converter = new Showdown.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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//
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// Showdown namespace
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//
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var Showdown = {};
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//
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// converter
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//
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// Wraps all "globals" so that the only thing
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// exposed is makeHtml().
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//
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Showdown.converter = function() {
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//
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// Globals:
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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 = 0;
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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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// Clear the global hashes. If we don't clear these, you get conflicts
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// from other articles when generating a page which contains more than
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// one article (e.g. an index page that shows the N most recent
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// articles):
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g_urls = new Array();
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g_titles = new Array();
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g_html_blocks = new Array();
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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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// 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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return text;
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}
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var _StripLinkDefinitions = function(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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var 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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[ \t]*
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\n? // maybe one newline
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[ \t]*
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(?:
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(\n*) // any lines skipped = $3 attacklab: lookbehind removed
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["(]
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(.+?) // title = $4
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[")]
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[ \t]*
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)? // title is optional
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(?:\n+|$)
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/gm,
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function(){...});
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*/
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var text = text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|\Z)/gm,
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function (wholeMatch,m1,m2,m3,m4) {
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m1 = m1.toLowerCase();
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g_urls[m1] = _EncodeAmpsAndAngles(m2); // Link IDs are case-insensitive
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if (m3) {
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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+m4;
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} else if (m4) {
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g_titles[m1] = m4.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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var _HashHTMLBlocks = function(text) {
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// attacklab: Double up blank lines to reduce lookaround
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text = text.replace(/\n/g,"\n\n");
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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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var 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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var 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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( // save in $1
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\n\n // Starting after a blank line
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[ ]{0,3}
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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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( // save in $1
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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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<!
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(--[^\r]*?--\s*)+
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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]*?--\s*)+>[ \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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<([?%]) // $2
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[^\r]*?
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\2>
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)
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[ \t]*
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(?=\n{2,}) // followed by a blank line
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)
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/g,hashElement);
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*/
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text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,hashElement);
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// attacklab: Undo double lines (see comment at top of this function)
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text = text.replace(/\n\n/g,"\n");
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return text;
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}
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var hashElement = function(wholeMatch,m1) {
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var blockText = m1;
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// Undo double lines
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blockText = blockText.replace(/\n\n/g,"\n");
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blockText = blockText.replace(/^\n/,"");
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// strip trailing blank lines
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blockText = blockText.replace(/\n+$/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 _RunBlockGamut = function(text) {
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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 = _DoHeaders(text);
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// Do Horizontal Rules:
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var key = hashBlock("<hr />");
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text = text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm,key);
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text = text.replace(/^[ ]{0,2}([ ]?\-[ ]?){3,}[ \t]*$/gm,key);
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text = text.replace(/^[ ]{0,2}([ ]?\_[ ]?){3,}[ \t]*$/gm,key);
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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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// 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);
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return text;
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}
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var _RunSpanGamut = function(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 = _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 = _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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return text;
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}
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var _EscapeSpecialCharsWithinTagAttributes = function(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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var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--.*?--\s*)+>)/gi;
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text = text.replace(regex, function(wholeMatch) {
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var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g,"$1`");
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tag = escapeCharacters(tag,"\\`*_");
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return tag;
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});
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return text;
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}
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var _DoAnchors = function(text) {
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//
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// Turn Markdown link shortcuts into XHTML <a> tags.
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//
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//
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// First, handle reference-style links: [link text] [id]
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//
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/*
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text = text.replace(/
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( // wrap whole match in $1
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\[
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(
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(?:
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\[[^\]]*\] // allow brackets nested one level
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[^\[] // or anything else
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)*
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)
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\]
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[ ]? // one optional space
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(?:\n[ ]*)? // one optional newline followed by spaces
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\[
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(.*?) // id = $3
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\]
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)()()()() // pad remaining backreferences
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/g,_DoAnchors_callback);
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*/
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text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,writeAnchorTag);
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//
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// Next, inline-style links: [link text](url "optional title")
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//
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/*
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text = text.replace(/
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( // wrap whole match in $1
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\[
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(
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(?:
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\[[^\]]*\] // allow brackets nested one level
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[^\[\]] // or anything else
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)
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)
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\]
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\( // literal paren
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[ \t]*
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() // no id, so leave $3 empty
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<?(.*?)>? // href = $4
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[ \t]*
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( // $5
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(['"]) // quote char = $6
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(.*?) // Title = $7
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\6 // matching quote
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[ \t]* // ignore any spaces/tabs between closing quote and )
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)? // title is optional
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\)
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)
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/g,writeAnchorTag);
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*/
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text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?(.*?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,writeAnchorTag);
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//
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// Last, handle reference-style shortcuts: [link text]
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// These must come last in case you've also got [link test][1]
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// or [link test](/foo)
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//
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/*
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text = text.replace(/
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( // wrap whole match in $1
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\[
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([^\[\]]+) // link text = $2; can't contain '[' or ']'
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\]
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)()()()()() // pad rest of backreferences
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/g, writeAnchorTag);
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*/
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text = text.replace(/(\[([^\[\]]+)\])()()()()()/g, writeAnchorTag);
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return text;
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}
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var writeAnchorTag = function(wholeMatch,m1,m2,m3,m4,m5,m6,m7) {
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if (m7 == undefined) m7 = "";
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var whole_match = m1;
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var link_text = m2;
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var link_id = m3.toLowerCase();
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var url = m4;
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var title = m7;
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if (url == "") {
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if (link_id == "") {
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// 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(/(\*|_)(?=\S)([^\r]*?\S)\1/g,
|
|
"<em>$2</em>");
|
|
|
|
return text;
|
|
}
|
|
|
|
|
|
var _DoBlockQuotes = function(text) {
|
|
|
|
/*
|
|
text = text.replace(/
|
|
( // Wrap whole match in $1
|
|
(
|
|
^[ \t]*>[ \t]? // '>' at the start of a line
|
|
.+\n // rest of the first line
|
|
(.+\n)* // subsequent consecutive lines
|
|
\n* // blanks
|
|
)+
|
|
)
|
|
/gm, function(){...});
|
|
*/
|
|
|
|
text = text.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm,
|
|
function(wholeMatch,m1) {
|
|
var bq = m1;
|
|
|
|
// attacklab: hack around Konqueror 3.5.4 bug:
|
|
// "----------bug".replace(/^-/g,"") == "bug"
|
|
|
|
bq = bq.replace(/^[ \t]*>[ \t]?/gm,"~0"); // trim one level of quoting
|
|
|
|
// attacklab: clean up hack
|
|
bq = bq.replace(/~0/g,"");
|
|
|
|
bq = bq.replace(/^[ \t]+$/gm,""); // trim whitespace-only lines
|
|
bq = _RunBlockGamut(bq); // recurse
|
|
|
|
bq = bq.replace(/(^|\n)/g,"$1 ");
|
|
// These leading spaces screw with <pre> content, so we need to fix that:
|
|
bq = bq.replace(
|
|
/(\s*<pre>[^\r]+?<\/pre>)/gm,
|
|
function(wholeMatch,m1) {
|
|
var pre = m1;
|
|
// attacklab: hack around Konqueror 3.5.4 bug:
|
|
pre = pre.replace(/^ /mg,"~0");
|
|
pre = pre.replace(/~0/g,"");
|
|
return pre;
|
|
});
|
|
|
|
return hashBlock("<blockquote>\n" + bq + "\n</blockquote>");
|
|
});
|
|
return text;
|
|
}
|
|
|
|
|
|
var _FormParagraphs = function(text) {
|
|
//
|
|
// Params:
|
|
// $text - string to process with html <p> tags
|
|
//
|
|
|
|
// Strip leading and trailing lines:
|
|
text = text.replace(/^\n+/g,"");
|
|
text = text.replace(/\n+$/g,"");
|
|
|
|
var grafs = text.split(/\n{2,}/g);
|
|
var grafsOut = new Array();
|
|
|
|
//
|
|
// Wrap <p> tags.
|
|
//
|
|
var end = grafs.length;
|
|
for (var i=0; i<end; i++) {
|
|
var str = grafs[i];
|
|
|
|
// if this is an HTML marker, copy it
|
|
if (str.search(/~K(\d+)K/g) >= 0) {
|
|
grafsOut.push(str);
|
|
}
|
|
else if (str.search(/\S/) >= 0) {
|
|
str = _RunSpanGamut(str);
|
|
str = str.replace(/^([ \t]*)/g,"<p>");
|
|
str += "</p>"
|
|
grafsOut.push(str);
|
|
}
|
|
|
|
}
|
|
|
|
//
|
|
// Unhashify HTML blocks
|
|
//
|
|
end = grafsOut.length;
|
|
for (var i=0; i<end; i++) {
|
|
// if this is a marker for an html block...
|
|
while (grafsOut[i].search(/~K(\d+)K/) >= 0) {
|
|
var blockText = g_html_blocks[RegExp.$1];
|
|
blockText = blockText.replace(/\$/g,"$$$$"); // Escape any dollar signs
|
|
grafsOut[i] = grafsOut[i].replace(/~K\d+K/,blockText);
|
|
}
|
|
}
|
|
|
|
return grafsOut.join("\n\n");
|
|
}
|
|
|
|
|
|
var _EncodeAmpsAndAngles = function(text) {
|
|
// Smart processing for ampersands and angle brackets that need to be encoded.
|
|
|
|
// Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
|
|
// http://bumppo.net/projects/amputator/
|
|
text = text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g,"&");
|
|
|
|
// Encode naked <'s
|
|
text = text.replace(/<(?![a-z\/?\$!])/gi,"<");
|
|
|
|
return text;
|
|
}
|
|
|
|
|
|
var _EncodeBackslashEscapes = function(text) {
|
|
//
|
|
// Parameter: String.
|
|
// Returns: The string, with after processing the following backslash
|
|
// escape sequences.
|
|
//
|
|
|
|
// attacklab: The polite way to do this is with the new
|
|
// escapeCharacters() function:
|
|
//
|
|
// text = escapeCharacters(text,"\\",true);
|
|
// text = escapeCharacters(text,"`*_{}[]()>#+-.!",true);
|
|
//
|
|
// ...but we're sidestepping its use of the (slow) RegExp constructor
|
|
// as an optimization for Firefox. This function gets called a LOT.
|
|
|
|
text = text.replace(/\\(\\)/g,escapeCharacters_callback);
|
|
text = text.replace(/\\([`*_{}\[\]()>#+-.!])/g,escapeCharacters_callback);
|
|
return text;
|
|
}
|
|
|
|
|
|
var _DoAutoLinks = function(text) {
|
|
|
|
text = text.replace(/<((https?|ftp|dict):[^'">\s]+)>/gi,"<a href=\"$1\">$1</a>");
|
|
|
|
// Email addresses: <address@domain.foo>
|
|
|
|
/*
|
|
text = text.replace(/
|
|
<
|
|
(?:mailto:)?
|
|
(
|
|
[-.\w]+
|
|
\@
|
|
[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
|
|
)
|
|
>
|
|
/gi, _DoAutoLinks_callback());
|
|
*/
|
|
text = text.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,
|
|
function(wholeMatch,m1) {
|
|
return _EncodeEmailAddress( _UnescapeSpecialChars(m1) );
|
|
}
|
|
);
|
|
|
|
return text;
|
|
}
|
|
|
|
|
|
var _EncodeEmailAddress = function(addr) {
|
|
//
|
|
// Input: an email address, e.g. "foo@example.com"
|
|
//
|
|
// Output: the email address as a mailto link, with each character
|
|
// of the address encoded as either a decimal or hex entity, in
|
|
// the hopes of foiling most address harvesting spam bots. E.g.:
|
|
//
|
|
// <a href="mailto:foo@e
|
|
// xample.com">foo
|
|
// @example.com</a>
|
|
//
|
|
// Based on a filter by Matthew Wickline, posted to the BBEdit-Talk
|
|
// mailing list: <http://tinyurl.com/yu7ue>
|
|
//
|
|
|
|
// attacklab: why can't javascript speak hex?
|
|
function char2hex(ch) {
|
|
var hexDigits = '0123456789ABCDEF';
|
|
var dec = ch.charCodeAt(0);
|
|
return(hexDigits.charAt(dec>>4) + hexDigits.charAt(dec&15));
|
|
}
|
|
|
|
var encode = [
|
|
function(ch){return "&#"+ch.charCodeAt(0)+";";},
|
|
function(ch){return "&#x"+char2hex(ch)+";";},
|
|
function(ch){return ch;}
|
|
];
|
|
|
|
addr = "mailto:" + addr;
|
|
|
|
addr = addr.replace(/./g, function(ch) {
|
|
if (ch == "@") {
|
|
// this *must* be encoded. I insist.
|
|
ch = encode[Math.floor(Math.random()*2)](ch);
|
|
} else if (ch !=":") {
|
|
// leave ':' alone (to spot mailto: later)
|
|
var r = Math.random();
|
|
// roughly 10% raw, 45% hex, 45% dec
|
|
ch = (
|
|
r > .9 ? encode[2](ch) :
|
|
r > .45 ? encode[1](ch) :
|
|
encode[0](ch)
|
|
);
|
|
}
|
|
return ch;
|
|
});
|
|
|
|
addr = "<a href=\"" + addr + "\">" + addr + "</a>";
|
|
addr = addr.replace(/">.+:/g,"\">"); // strip the mailto: from the visible part
|
|
|
|
return addr;
|
|
}
|
|
|
|
|
|
var _UnescapeSpecialChars = function(text) {
|
|
//
|
|
// Swap back in all the special characters we've hidden.
|
|
//
|
|
text = text.replace(/~E(\d+)E/g,
|
|
function(wholeMatch,m1) {
|
|
var charCodeToReplace = parseInt(m1);
|
|
return String.fromCharCode(charCodeToReplace);
|
|
}
|
|
);
|
|
return text;
|
|
}
|
|
|
|
|
|
var _Outdent = function(text) {
|
|
//
|
|
// Remove one level of line-leading tabs or spaces
|
|
//
|
|
|
|
// attacklab: hack around Konqueror 3.5.4 bug:
|
|
// "----------bug".replace(/^-/g,"") == "bug"
|
|
|
|
text = text.replace(/^(\t|[ ]{1,4})/gm,"~0"); // attacklab: g_tab_width
|
|
|
|
// attacklab: clean up hack
|
|
text = text.replace(/~0/g,"")
|
|
|
|
return text;
|
|
}
|
|
|
|
var _Detab = function(text) {
|
|
// attacklab: Detab's completely rewritten for speed.
|
|
// In perl we could fix it by anchoring the regexp with \G.
|
|
// In javascript we're less fortunate.
|
|
|
|
// expand first n-1 tabs
|
|
text = text.replace(/\t(?=\t)/g," "); // attacklab: g_tab_width
|
|
|
|
// replace the nth with two sentinels
|
|
text = text.replace(/\t/g,"~A~B");
|
|
|
|
// use the sentinel to anchor our regex so it doesn't explode
|
|
text = text.replace(/~B(.+?)~A/g,
|
|
function(wholeMatch,m1,m2) {
|
|
var leadingText = m1;
|
|
var numSpaces = 4 - leadingText.length % 4; // attacklab: g_tab_width
|
|
|
|
// there *must* be a better way to do this:
|
|
for (var i=0; i<numSpaces; i++) leadingText+=" ";
|
|
|
|
return leadingText;
|
|
}
|
|
);
|
|
|
|
// clean up sentinels
|
|
text = text.replace(/~A/g," "); // attacklab: g_tab_width
|
|
text = text.replace(/~B/g,"");
|
|
|
|
return text;
|
|
}
|
|
|
|
|
|
//
|
|
// attacklab: Utility functions
|
|
//
|
|
|
|
|
|
var escapeCharacters = function(text, charsToEscape, afterBackslash) {
|
|
// First we have to escape the escape characters so that
|
|
// we can build a character class out of them
|
|
var regexString = "([" + charsToEscape.replace(/([\[\]\\])/g,"\\$1") + "])";
|
|
|
|
if (afterBackslash) {
|
|
regexString = "\\\\" + regexString;
|
|
}
|
|
|
|
var regex = new RegExp(regexString,"g");
|
|
text = text.replace(regex,escapeCharacters_callback);
|
|
|
|
return text;
|
|
}
|
|
|
|
|
|
var escapeCharacters_callback = function(wholeMatch,m1) {
|
|
var charCodeToEscape = m1.charCodeAt(0);
|
|
return "~E"+charCodeToEscape+"E";
|
|
}
|
|
|
|
} // end of Showdown.converter
|