1332 lines
52 KiB
JavaScript
Executable file
1332 lines
52 KiB
JavaScript
Executable file
var Markdown;
|
|
|
|
if (typeof exports === "object" && typeof require === "function") // we're in a CommonJS (e.g. Node.js) module
|
|
Markdown = exports;
|
|
else
|
|
Markdown = {};
|
|
|
|
// The following text is included for historical reasons, but should
|
|
// be taken with a pinch of salt; it's not all true anymore.
|
|
|
|
//
|
|
// Wherever possible, Showdown is a straight, line-by-line port
|
|
// of the Perl version of Markdown.
|
|
//
|
|
// This is not a normal parser design; it's basically just a
|
|
// series of string substitutions. It's hard to read and
|
|
// maintain this way, but keeping Showdown close to the original
|
|
// design makes it easier to port new features.
|
|
//
|
|
// More importantly, Showdown behaves like markdown.pl in most
|
|
// edge cases. So web applications can do client-side preview
|
|
// in Javascript, and then build identical HTML on the server.
|
|
//
|
|
// This port needs the new RegExp functionality of ECMA 262,
|
|
// 3rd Edition (i.e. Javascript 1.5). Most modern web browsers
|
|
// should do fine. Even with the new regular expression features,
|
|
// We do a lot of work to emulate Perl's regex functionality.
|
|
// The tricky changes in this file mostly have the "attacklab:"
|
|
// label. Major or self-explanatory changes don't.
|
|
//
|
|
// Smart diff tools like Araxis Merge will be able to match up
|
|
// this file with markdown.pl in a useful way. A little tweaking
|
|
// helps: in a copy of markdown.pl, replace "#" with "//" and
|
|
// replace "$text" with "text". Be sure to ignore whitespace
|
|
// and line endings.
|
|
//
|
|
|
|
|
|
//
|
|
// Usage:
|
|
//
|
|
// var text = "Markdown *rocks*.";
|
|
//
|
|
// var converter = new Markdown.Converter();
|
|
// var html = converter.makeHtml(text);
|
|
//
|
|
// alert(html);
|
|
//
|
|
// Note: move the sample code to the bottom of this
|
|
// file before uncommenting it.
|
|
//
|
|
|
|
(function () {
|
|
|
|
function identity(x) { return x; }
|
|
function returnFalse(x) { return false; }
|
|
|
|
function HookCollection() { }
|
|
|
|
HookCollection.prototype = {
|
|
|
|
chain: function (hookname, func) {
|
|
var original = this[hookname];
|
|
if (!original)
|
|
throw new Error("unknown hook " + hookname);
|
|
|
|
if (original === identity)
|
|
this[hookname] = func;
|
|
else
|
|
this[hookname] = function (x) { return func(original(x)); }
|
|
},
|
|
set: function (hookname, func) {
|
|
if (!this[hookname])
|
|
throw new Error("unknown hook " + hookname);
|
|
this[hookname] = func;
|
|
},
|
|
addNoop: function (hookname) {
|
|
this[hookname] = identity;
|
|
},
|
|
addFalse: function (hookname) {
|
|
this[hookname] = returnFalse;
|
|
}
|
|
};
|
|
|
|
Markdown.HookCollection = HookCollection;
|
|
|
|
// g_urls and g_titles allow arbitrary user-entered strings as keys. This
|
|
// caused an exception (and hence stopped the rendering) when the user entered
|
|
// e.g. [push] or [__proto__]. Adding a prefix to the actual key prevents this
|
|
// (since no builtin property starts with "s_"). See
|
|
// http://meta.stackoverflow.com/questions/64655/strange-wmd-bug
|
|
// (granted, switching from Array() to Object() alone would have left only __proto__
|
|
// to be a problem)
|
|
function SaveHash() { }
|
|
SaveHash.prototype = {
|
|
set: function (key, value) {
|
|
this["s_" + key] = value;
|
|
},
|
|
get: function (key) {
|
|
return this["s_" + key];
|
|
}
|
|
};
|
|
|
|
Markdown.Converter = function () {
|
|
var pluginHooks = this.hooks = new HookCollection();
|
|
pluginHooks.addNoop("plainLinkText"); // given a URL that was encountered by itself (without markup), should return the link text that's to be given to this link
|
|
pluginHooks.addNoop("preConversion"); // called with the orignal text as given to makeHtml. The result of this plugin hook is the actual markdown source that will be cooked
|
|
pluginHooks.addNoop("postConversion"); // called with the final cooked HTML code. The result of this plugin hook is the actual output of makeHtml
|
|
|
|
//
|
|
// Private state of the converter instance:
|
|
//
|
|
|
|
// Global hashes, used by various utility routines
|
|
var g_urls;
|
|
var g_titles;
|
|
var g_html_blocks;
|
|
|
|
// Used to track when we're inside an ordered or unordered list
|
|
// (see _ProcessListItems() for details):
|
|
var g_list_level;
|
|
|
|
this.makeHtml = function (text) {
|
|
|
|
//
|
|
// Main function. The order in which other subs are called here is
|
|
// essential. Link and image substitutions need to happen before
|
|
// _EscapeSpecialCharsWithinTagAttributes(), so that any *'s or _'s in the <a>
|
|
// and <img> tags get encoded.
|
|
//
|
|
|
|
// This will only happen if makeHtml on the same converter instance is called from a plugin hook.
|
|
// Don't do that.
|
|
if (g_urls)
|
|
throw new Error("Recursive call to converter.makeHtml");
|
|
|
|
// Create the private state objects.
|
|
g_urls = new SaveHash();
|
|
g_titles = new SaveHash();
|
|
g_html_blocks = [];
|
|
g_list_level = 0;
|
|
|
|
text = pluginHooks.preConversion(text);
|
|
|
|
// attacklab: Replace ~ with ~T
|
|
// This lets us use tilde as an escape char to avoid md5 hashes
|
|
// The choice of character is arbitray; anything that isn't
|
|
// magic in Markdown will work.
|
|
text = text.replace(/~/g, "~T");
|
|
|
|
// attacklab: Replace $ with ~D
|
|
// RegExp interprets $ as a special character
|
|
// when it's in a replacement string
|
|
text = text.replace(/\$/g, "~D");
|
|
|
|
// Standardize line endings
|
|
text = text.replace(/\r\n/g, "\n"); // DOS to Unix
|
|
text = text.replace(/\r/g, "\n"); // Mac to Unix
|
|
|
|
// Make sure text begins and ends with a couple of newlines:
|
|
text = "\n\n" + text + "\n\n";
|
|
|
|
// Convert all tabs to spaces.
|
|
text = _Detab(text);
|
|
|
|
// Strip any lines consisting only of spaces and tabs.
|
|
// This makes subsequent regexen easier to write, because we can
|
|
// match consecutive blank lines with /\n+/ instead of something
|
|
// contorted like /[ \t]*\n+/ .
|
|
text = text.replace(/^[ \t]+$/mg, "");
|
|
|
|
// Turn block-level HTML blocks into hash entries
|
|
text = _HashHTMLBlocks(text);
|
|
|
|
// Strip link definitions, store in hashes.
|
|
text = _StripLinkDefinitions(text);
|
|
|
|
text = _RunBlockGamut(text);
|
|
|
|
text = _UnescapeSpecialChars(text);
|
|
|
|
// attacklab: Restore dollar signs
|
|
text = text.replace(/~D/g, "$$");
|
|
|
|
// attacklab: Restore tildes
|
|
text = text.replace(/~T/g, "~");
|
|
|
|
text = pluginHooks.postConversion(text);
|
|
|
|
g_html_blocks = g_titles = g_urls = null;
|
|
|
|
return text;
|
|
};
|
|
|
|
function _StripLinkDefinitions(text) {
|
|
//
|
|
// Strips link definitions from text, stores the URLs and titles in
|
|
// hash references.
|
|
//
|
|
|
|
// Link defs are in the form: ^[id]: url "optional title"
|
|
|
|
/*
|
|
text = text.replace(/
|
|
^[ ]{0,3}\[(.+)\]: // id = $1 attacklab: g_tab_width - 1
|
|
[ \t]*
|
|
\n? // maybe *one* newline
|
|
[ \t]*
|
|
<?(\S+?)>? // url = $2
|
|
(?=\s|$) // lookahead for whitespace instead of the lookbehind removed below
|
|
[ \t]*
|
|
\n? // maybe one newline
|
|
[ \t]*
|
|
( // (potential) title = $3
|
|
(\n*) // any lines skipped = $4 attacklab: lookbehind removed
|
|
[ \t]+
|
|
["(]
|
|
(.+?) // title = $5
|
|
[")]
|
|
[ \t]*
|
|
)? // title is optional
|
|
(?:\n+|$)
|
|
/gm, function(){...});
|
|
*/
|
|
|
|
text = text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?(?=\s|$)[ \t]*\n?[ \t]*((\n*)["(](.+?)[")][ \t]*)?(?:\n+)/gm,
|
|
function (wholeMatch, m1, m2, m3, m4, m5) {
|
|
m1 = m1.toLowerCase();
|
|
g_urls.set(m1, _EncodeAmpsAndAngles(m2)); // Link IDs are case-insensitive
|
|
if (m4) {
|
|
// Oops, found blank lines, so it's not a title.
|
|
// Put back the parenthetical statement we stole.
|
|
return m3;
|
|
} else if (m5) {
|
|
g_titles.set(m1, m5.replace(/"/g, """));
|
|
}
|
|
|
|
// Completely remove the definition from the text
|
|
return "";
|
|
}
|
|
);
|
|
|
|
return text;
|
|
}
|
|
|
|
function _HashHTMLBlocks(text) {
|
|
|
|
// Hashify HTML blocks:
|
|
// We only want to do this for block-level HTML tags, such as headers,
|
|
// lists, and tables. That's because we still want to wrap <p>s around
|
|
// "paragraphs" that are wrapped in non-block-level tags, such as anchors,
|
|
// phrase emphasis, and spans. The list of tags we're looking for is
|
|
// hard-coded:
|
|
var block_tags_a = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del"
|
|
var block_tags_b = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math"
|
|
|
|
// First, look for nested blocks, e.g.:
|
|
// <div>
|
|
// <div>
|
|
// tags for inner block must be indented.
|
|
// </div>
|
|
// </div>
|
|
//
|
|
// The outermost tags must start at the left margin for this to match, and
|
|
// the inner nested divs must be indented.
|
|
// We need to do this before the next, more liberal match, because the next
|
|
// match will start at the first `<div>` and stop at the first `</div>`.
|
|
|
|
// attacklab: This regex can be expensive when it fails.
|
|
|
|
/*
|
|
text = text.replace(/
|
|
( // save in $1
|
|
^ // start of line (with /m)
|
|
<($block_tags_a) // start tag = $2
|
|
\b // word break
|
|
// attacklab: hack around khtml/pcre bug...
|
|
[^\r]*?\n // any number of lines, minimally matching
|
|
</\2> // the matching end tag
|
|
[ \t]* // trailing spaces/tabs
|
|
(?=\n+) // followed by a newline
|
|
) // attacklab: there are sentinel newlines at end of document
|
|
/gm,function(){...}};
|
|
*/
|
|
text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del)\b[^\r]*?\n<\/\2>[ \t]*(?=\n+))/gm, hashElement);
|
|
|
|
//
|
|
// Now match more liberally, simply from `\n<tag>` to `</tag>\n`
|
|
//
|
|
|
|
/*
|
|
text = text.replace(/
|
|
( // save in $1
|
|
^ // start of line (with /m)
|
|
<($block_tags_b) // start tag = $2
|
|
\b // word break
|
|
// attacklab: hack around khtml/pcre bug...
|
|
[^\r]*? // any number of lines, minimally matching
|
|
.*</\2> // the matching end tag
|
|
[ \t]* // trailing spaces/tabs
|
|
(?=\n+) // followed by a newline
|
|
) // attacklab: there are sentinel newlines at end of document
|
|
/gm,function(){...}};
|
|
*/
|
|
text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math)\b[^\r]*?.*<\/\2>[ \t]*(?=\n+)\n)/gm, hashElement);
|
|
|
|
// Special case just for <hr />. It was easier to make a special case than
|
|
// to make the other regex more complicated.
|
|
|
|
/*
|
|
text = text.replace(/
|
|
\n // Starting after a blank line
|
|
[ ]{0,3}
|
|
( // save in $1
|
|
(<(hr) // start tag = $2
|
|
\b // word break
|
|
([^<>])*?
|
|
\/?>) // the matching end tag
|
|
[ \t]*
|
|
(?=\n{2,}) // followed by a blank line
|
|
)
|
|
/g,hashElement);
|
|
*/
|
|
text = text.replace(/\n[ ]{0,3}((<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g, hashElement);
|
|
|
|
// Special case for standalone HTML comments:
|
|
|
|
/*
|
|
text = text.replace(/
|
|
\n\n // Starting after a blank line
|
|
[ ]{0,3} // attacklab: g_tab_width - 1
|
|
( // save in $1
|
|
<!
|
|
(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--) // see http://www.w3.org/TR/html-markup/syntax.html#comments and http://meta.stackoverflow.com/q/95256
|
|
>
|
|
[ \t]*
|
|
(?=\n{2,}) // followed by a blank line
|
|
)
|
|
/g,hashElement);
|
|
*/
|
|
text = text.replace(/\n\n[ ]{0,3}(<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>[ \t]*(?=\n{2,}))/g, hashElement);
|
|
|
|
// PHP and ASP-style processor instructions (<?...?> and <%...%>)
|
|
|
|
/*
|
|
text = text.replace(/
|
|
(?:
|
|
\n\n // Starting after a blank line
|
|
)
|
|
( // save in $1
|
|
[ ]{0,3} // attacklab: g_tab_width - 1
|
|
(?:
|
|
<([?%]) // $2
|
|
[^\r]*?
|
|
\2>
|
|
)
|
|
[ \t]*
|
|
(?=\n{2,}) // followed by a blank line
|
|
)
|
|
/g,hashElement);
|
|
*/
|
|
text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g, hashElement);
|
|
|
|
return text;
|
|
}
|
|
|
|
function hashElement(wholeMatch, m1) {
|
|
var blockText = m1;
|
|
|
|
// Undo double lines
|
|
blockText = blockText.replace(/^\n+/, "");
|
|
|
|
// strip trailing blank lines
|
|
blockText = blockText.replace(/\n+$/g, "");
|
|
|
|
// Replace the element text with a marker ("~KxK" where x is its key)
|
|
blockText = "\n\n~K" + (g_html_blocks.push(blockText) - 1) + "K\n\n";
|
|
|
|
return blockText;
|
|
}
|
|
|
|
function _RunBlockGamut(text, doNotUnhash) {
|
|
//
|
|
// These are all the transformations that form block-level
|
|
// tags like paragraphs, headers, and list items.
|
|
//
|
|
text = _DoHeaders(text);
|
|
|
|
// Do Horizontal Rules:
|
|
var replacement = "<hr />\n";
|
|
text = text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm, replacement);
|
|
text = text.replace(/^[ ]{0,2}([ ]?-[ ]?){3,}[ \t]*$/gm, replacement);
|
|
text = text.replace(/^[ ]{0,2}([ ]?_[ ]?){3,}[ \t]*$/gm, replacement);
|
|
|
|
text = _DoLists(text);
|
|
text = _DoCodeBlocks(text);
|
|
text = _DoBlockQuotes(text);
|
|
|
|
// We already ran _HashHTMLBlocks() before, in Markdown(), but that
|
|
// was to escape raw HTML in the original Markdown source. This time,
|
|
// we're escaping the markup we've just created, so that we don't wrap
|
|
// <p> tags around block-level tags.
|
|
text = _HashHTMLBlocks(text);
|
|
text = _FormParagraphs(text, doNotUnhash);
|
|
|
|
return text;
|
|
}
|
|
|
|
function _RunSpanGamut(text) {
|
|
//
|
|
// These are all the transformations that occur *within* block-level
|
|
// tags like paragraphs, headers, and list items.
|
|
//
|
|
|
|
text = _DoCodeSpans(text);
|
|
text = _EscapeSpecialCharsWithinTagAttributes(text);
|
|
text = _EncodeBackslashEscapes(text);
|
|
|
|
// Process anchor and image tags. Images must come first,
|
|
// because ![foo][f] looks like an anchor.
|
|
text = _DoImages(text);
|
|
text = _DoAnchors(text);
|
|
|
|
// Make links out of things like `<http://example.com/>`
|
|
// Must come after _DoAnchors(), because you can use < and >
|
|
// delimiters in inline links like [this](<url>).
|
|
text = _DoAutoLinks(text);
|
|
|
|
text = text.replace(/~P/g, "://"); // put in place to prevent autolinking; reset now
|
|
|
|
text = _EncodeAmpsAndAngles(text);
|
|
text = _DoItalicsAndBold(text);
|
|
|
|
// Do hard breaks:
|
|
text = text.replace(/ +\n/g, " <br>\n");
|
|
|
|
return text;
|
|
}
|
|
|
|
function _EscapeSpecialCharsWithinTagAttributes(text) {
|
|
//
|
|
// Within tags -- meaning between < and > -- encode [\ ` * _] so they
|
|
// don't conflict with their use in Markdown for code, italics and strong.
|
|
//
|
|
|
|
// Build a regex to find HTML tags and comments. See Friedl's
|
|
// "Mastering Regular Expressions", 2nd Ed., pp. 200-201.
|
|
|
|
// SE: changed the comment part of the regex
|
|
|
|
var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>)/gi;
|
|
|
|
text = text.replace(regex, function (wholeMatch) {
|
|
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|^)
|
|
( // $1 = the code block -- one or more lines, starting with a space/tab
|
|
(?:
|
|
(?:[ ]{4}|\t) // Lines must start with a tab or a tab-width of spaces - attacklab: g_tab_width
|
|
.*\n+
|
|
)+
|
|
)
|
|
(\n*[ ]{0,3}[^ \t\n]|(?=~0)) // attacklab: g_tab_width
|
|
/g ,function(){...});
|
|
*/
|
|
|
|
// attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
|
|
text += "~0";
|
|
|
|
text = text.replace(/(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g,
|
|
function (wholeMatch, m1, m2) {
|
|
var codeblock = m1;
|
|
var nextChar = m2;
|
|
|
|
codeblock = _EncodeCode(_Outdent(codeblock));
|
|
codeblock = _Detab(codeblock);
|
|
codeblock = codeblock.replace(/^\n+/g, ""); // trim leading newlines
|
|
codeblock = codeblock.replace(/\n+$/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 _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 space/BOF and followed by non-word/EOF character
|
|
text = text.replace(/(^|\s)(https?|ftp)(:\/\/[-A-Z0-9+&@#\/%?=~_|\[\]\(\)!:,\.;]*[-A-Z0-9+&@#\/%=~_|\[\]])($|\W)/gi, "$1<$2$3>$4");
|
|
|
|
// autolink anything like <http://example.com>
|
|
|
|
var replacer = function (wholematch, m1) { return "<a href=\"" + m1 + "\">" + pluginHooks.plainLinkText(m1) + "</a>"; }
|
|
text = text.replace(/<((https?|ftp):[^'">\s]+)>/gi, replacer);
|
|
|
|
// Email addresses: <address@domain.foo>
|
|
/*
|
|
text = text.replace(/
|
|
<
|
|
(?:mailto:)?
|
|
(
|
|
[-.\w]+
|
|
\@
|
|
[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
|
|
)
|
|
>
|
|
/gi, _DoAutoLinks_callback());
|
|
*/
|
|
|
|
/* disabling email autolinking, since we don't do that on the server, either
|
|
text = text.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,
|
|
function(wholeMatch,m1) {
|
|
return _EncodeEmailAddress( _UnescapeSpecialChars(m1) );
|
|
}
|
|
);
|
|
*/
|
|
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
|
|
|
|
})();
|