showdown/dist/showdown.js

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;/*! showdown 28-05-2015 */
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(function(){
/**
* Created by Tivie on 06-01-2015.
*/
// Private properties
var showdown = {},
parsers = {},
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extensions = {},
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globalOptions = {
omitExtraWLInCodeBlocks: false,
prefixHeaderId: false
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};
/**
* helper namespace
* @type {{}}
*/
showdown.helper = {};
// Public properties
showdown.extensions = {};
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/**
* Set a global option
* @static
* @param {string} key
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* @param {*} value
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* @returns {showdown}
*/
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showdown.setOption = function (key, value) {
'use strict';
globalOptions[key] = value;
return this;
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};
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/**
* Get a global option
* @static
* @param {string} key
* @returns {*}
*/
showdown.getOption = function (key) {
'use strict';
return globalOptions[key];
};
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/**
* Get the global options
* @static
* @returns {{omitExtraWLInCodeBlocks: boolean, prefixHeaderId: boolean}}
*/
showdown.getOptions = function () {
'use strict';
return globalOptions;
};
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/**
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* Get or set a subParser
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*
* subParser(name) - Get a registered subParser
* subParser(name, func) - Register a subParser
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* @static
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* @param {string} name
* @param {function} [func]
* @returns {*}
*/
showdown.subParser = function (name, func) {
'use strict';
if (showdown.helper.isString(name)) {
if (typeof func !== 'undefined') {
parsers[name] = func;
} else {
if (parsers.hasOwnProperty(name)) {
return parsers[name];
} else {
throw Error('SubParser named ' + name + ' not registered!');
}
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}
}
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};
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showdown.extension = function (name, ext) {
'use strict';
if (!showdown.helper.isString(name)) {
throw Error('Extension \'name\' must be a string');
}
name = showdown.helper.stdExtName(name);
if (showdown.helper.isUndefined(ext)) {
return getExtension();
} else {
return setExtension();
}
};
function getExtension(name) {
'use strict';
if (!extensions.hasOwnProperty(name)) {
throw Error('Extension named ' + name + ' is not registered!');
}
return extensions[name];
}
function setExtension(name, ext) {
'use strict';
if (typeof ext !== 'object') {
throw Error('A Showdown Extension must be an object, ' + typeof ext + ' given');
}
if (!showdown.helper.isString(ext.type)) {
throw Error('When registering a showdown extension, "type" must be a string, ' + typeof ext.type + ' given');
}
ext.type = ext.type.toLowerCase();
extensions[name] = ext;
}
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/**
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* Showdown Converter class
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*
* @param {object} [converterOptions]
* @returns {{makeHtml: Function}}
*/
showdown.Converter = function (converterOptions) {
'use strict';
converterOptions = converterOptions || {};
var options = {},
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langExtensions = [],
outputModifiers = [],
parserOrder = [
'githubCodeBlocks',
'hashHTMLBlocks',
'stripLinkDefinitions',
'blockGamut',
'unescapeSpecialChars'
];
for (var gOpt in globalOptions) {
if (globalOptions.hasOwnProperty(gOpt)) {
options[gOpt] = globalOptions[gOpt];
}
}
// Merge options
if (typeof converterOptions === 'object') {
for (var opt in converterOptions) {
if (converterOptions.hasOwnProperty(opt)) {
options[opt] = converterOptions[opt];
}
}
}
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// This is a dirty workaround to maintain backwards extension compatibility
// We define a self var (which is a copy of this) and inject the makeHtml function
// directly to it. This ensures a full converter object is available when iterating over extensions
// We should rewrite the extension loading mechanism and use some kind of interface or decorator pattern
// and inject the object reference there instead.
var self = this;
self.makeHtml = makeHtml;
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// Parse options
if (options.extensions) {
// Iterate over each plugin
showdown.helper.forEach(options.extensions, function (plugin) {
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var pluginName = plugin;
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// Assume it's a bundled plugin if a string is given
if (typeof plugin === 'string') {
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var tPluginName = showdown.helper.stdExtName(plugin);
if (!showdown.helper.isUndefined(showdown.extensions[tPluginName]) && showdown.extensions[tPluginName]) {
//Trigger some kind of deprecated alert
plugin = showdown.extensions[tPluginName];
} else if (!showdown.helper.isUndefined(extensions[tPluginName])) {
plugin = extensions[tPluginName];
}
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}
if (typeof plugin === 'function') {
// Iterate over each extension within that plugin
showdown.helper.forEach(plugin(self), function (ext) {
// Sort extensions by type
if (ext.type) {
if (ext.type === 'language' || ext.type === 'lang') {
langExtensions.push(ext);
} else if (ext.type === 'output' || ext.type === 'html') {
outputModifiers.push(ext);
}
} else {
// Assume language extension
outputModifiers.push(ext);
}
});
} else {
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var errMsg = 'An extension could not be loaded. It was either not found or is not a valid extension.';
if (typeof pluginName === 'string') {
errMsg = 'Extension "' + pluginName + '" could not be loaded. It was either not found or is not a valid extension.';
}
throw errMsg;
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}
});
}
/**
* Converts a markdown string into HTML
* @param {string} text
* @returns {*}
*/
function makeHtml(text) {
//check if text is not falsy
if (!text) {
return text;
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}
var globals = {
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gHtmlBlocks: [],
gUrls: {},
gTitles: {},
gListLevel: 0,
hashLinkCounts: {},
langExtensions: langExtensions,
outputModifiers: outputModifiers
};
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// attacklab: Replace ~ with ~T
// This lets us use tilde as an escape char to avoid md5 hashes
// The choice of character is arbitrary; anything that isn't
// magic in Markdown will work.
text = text.replace(/~/g, '~T');
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// attacklab: Replace $ with ~D
// RegExp interprets $ as a special character
// when it's in a replacement string
text = text.replace(/\$/g, '~D');
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// Standardize line endings
text = text.replace(/\r\n/g, '\n'); // DOS to Unix
text = text.replace(/\r/g, '\n'); // Mac to Unix
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// Make sure text begins and ends with a couple of newlines:
text = '\n\n' + text + '\n\n';
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// detab
text = parsers.detab(text, options, globals);
// stripBlankLines
text = parsers.stripBlankLines(text, options, globals);
//run languageExtensions
text = parsers.languageExtensions(text, options, globals);
// Run all registered parsers
for (var i = 0; i < parserOrder.length; ++i) {
var name = parserOrder[i];
text = parsers[name](text, options, globals);
}
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// attacklab: Restore dollar signs
text = text.replace(/~D/g, '$$');
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// attacklab: Restore tildes
text = text.replace(/~T/g, '~');
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// Run output modifiers
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showdown.helper.forEach(globals.outputModifiers, function (ext) {
text = showdown.subParser('runExtension')(ext, text);
});
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text = parsers.outputModifiers(text, options, globals);
return text;
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}
/**
* Set an option of this Converter instance
* @param {string} key
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* @param {*} value
*/
function setOption (key, value) {
options[key] = value;
}
/**
* Get the option of this Converter instance
* @param {string} key
* @returns {*}
*/
function getOption(key) {
return options[key];
}
/**
* Get the options of this Converter instance
* @returns {{}}
*/
function getOptions() {
return options;
}
return {
makeHtml: makeHtml,
setOption: setOption,
getOption: getOption,
getOptions: getOptions
};
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};
/**
* showdownjs helper functions
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*/
if (!showdown.hasOwnProperty('helper')) {
showdown.helper = {};
}
/**
* Check if var is string
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* @static
* @param {string} a
* @returns {boolean}
*/
showdown.helper.isString = function isString(a) {
'use strict';
return (typeof a === 'string' || a instanceof String);
};
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/**
* ForEach helper function
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* @static
* @param {*} obj
* @param {function} callback
*/
showdown.helper.forEach = function forEach(obj, callback) {
'use strict';
if (typeof obj.forEach === 'function') {
obj.forEach(callback);
} else {
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for (var i = 0; i < obj.length; i++) {
callback(obj[i], i, obj);
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}
}
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};
/**
* isArray helper function
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* @static
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* @param {*} a
* @returns {boolean}
*/
showdown.helper.isArray = function isArray(a) {
'use strict';
return a.constructor === Array;
};
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/**
* Check if value is undefined
* @static
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
*/
showdown.helper.isUndefined = function isUndefined(value) {
'use strict';
return typeof value === 'undefined';
};
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/**
* Standardidize extension name
* @static
* @param {string} s extension name
* @returns {string}
*/
showdown.helper.stdExtName = function (s) {
'use strict';
return s.replace(/[_-]||\s/g, '').toLowerCase();
};
function escapeCharactersCallback(wholeMatch, m1) {
'use strict';
var charCodeToEscape = m1.charCodeAt(0);
return '~E' + charCodeToEscape + 'E';
}
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/**
* Callback used to escape characters when passing through String.replace
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* @static
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* @param {string} wholeMatch
* @param {string} m1
* @returns {string}
*/
showdown.helper.escapeCharactersCallback = escapeCharactersCallback;
/**
* Escape characters in a string
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* @static
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* @param {string} text
* @param {string} charsToEscape
* @param {boolean} afterBackslash
* @returns {XML|string|void|*}
*/
showdown.helper.escapeCharacters = function escapeCharacters(text, charsToEscape, afterBackslash) {
'use strict';
// 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') + '])';
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if (afterBackslash) {
regexString = '\\\\' + regexString;
}
var regex = new RegExp(regexString, 'g');
text = text.replace(regex, escapeCharactersCallback);
return text;
};
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/**
* Turn Markdown link shortcuts into XHTML <a> tags.
*/
showdown.subParser('anchors', function (text, config, globals) {
'use strict';
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var writeAnchorTag = function (wholeMatch, m1, m2, m3, m4, m5, m6, m7) {
if (showdown.helper.isUndefined(m7)) {
m7 = '';
}
wholeMatch = m1;
var linkText = m2,
linkId = m3.toLowerCase(),
url = m4,
title = m7;
if (!url) {
if (!linkId) {
// lower-case and turn embedded newlines into spaces
linkId = linkText.toLowerCase().replace(/ ?\n/g, ' ');
}
url = '#' + linkId;
if (!showdown.helper.isUndefined(globals.gUrls[linkId])) {
url = globals.gUrls[linkId];
if (!showdown.helper.isUndefined(globals.gTitles[linkId])) {
title = globals.gTitles[linkId];
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}
} else {
if (wholeMatch.search(/\(\s*\)$/m) > -1) {
// Special case for explicit empty url
url = '';
} else {
return wholeMatch;
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}
}
}
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url = showdown.helper.escapeCharacters(url, '*_', false);
var result = '<a href="' + url + '"';
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if (title !== '' && title !== null) {
title = title.replace(/"/g, '&quot;');
title = showdown.helper.escapeCharacters(title, '*_', false);
result += ' title="' + title + '"';
}
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result += '>' + linkText + '</a>';
return result;
};
// First, handle reference-style links: [link text] [id]
/*
text = text.replace(/
( // wrap whole match in $1
\[
(
(?:
\[[^\]]*\] // allow brackets nested one level
|
[^\[] // or anything else
)*
)
\]
[ ]? // one optional space
(?:\n[ ]*)? // one optional newline followed by spaces
\[
(.*?) // id = $3
\]
)()()()() // pad remaining backreferences
/g,_DoAnchors_callback);
*/
text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g, writeAnchorTag);
//
// Next, inline-style links: [link text](url "optional title")
//
/*
text = text.replace(/
( // wrap whole match in $1
\[
(
(?:
\[[^\]]*\] // allow brackets nested one level
|
[^\[\]] // or anything else
)
)
\]
\( // literal paren
[ \t]*
() // no id, so leave $3 empty
<?(.*?)>? // href = $4
[ \t]*
( // $5
(['"]) // quote char = $6
(.*?) // Title = $7
\6 // matching quote
[ \t]* // ignore any spaces/tabs between closing quote and )
)? // title is optional
\)
)
/g,writeAnchorTag);
*/
text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?(.*?(?:\(.*?\).*?)?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,
writeAnchorTag);
//
// Last, handle reference-style shortcuts: [link text]
// These must come last in case you've also got [link test][1]
// or [link test](/foo)
//
/*
text = text.replace(/
( // wrap whole match in $1
\[
([^\[\]]+) // link text = $2; can't contain '[' or ']'
\]
)()()()()() // pad rest of backreferences
/g, writeAnchorTag);
*/
text = text.replace(/(\[([^\[\]]+)\])()()()()()/g, writeAnchorTag);
return text;
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});
showdown.subParser('autoLinks', function (text) {
'use strict';
text = text.replace(/<((https?|ftp|dict):[^'">\s]+)>/gi, '<a href=\"$1\">$1</a>');
// Email addresses: <address@domain.foo>
/*
text = text.replace(/
<
(?:mailto:)?
(
[-.\w]+
\@
[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
)
>
/gi);
*/
var pattern = /<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi;
text = text.replace(pattern, function (wholeMatch, m1) {
var unescapedStr = showdown.subParser('unescapeSpecialChars')(m1);
return showdown.subParser('encodeEmailAddress')(unescapedStr);
});
return text;
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});
/**
* These are all the transformations that form block-level
* tags like paragraphs, headers, and list items.
*/
showdown.subParser('blockGamut', function (text, options, globals) {
'use strict';
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text = showdown.subParser('headers')(text, options, globals);
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// Do Horizontal Rules:
var key = showdown.subParser('hashBlock')('<hr />', options, globals);
text = text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm, key);
text = text.replace(/^[ ]{0,2}([ ]?\-[ ]?){3,}[ \t]*$/gm, key);
text = text.replace(/^[ ]{0,2}([ ]?\_[ ]?){3,}[ \t]*$/gm, key);
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text = showdown.subParser('lists')(text, options, globals);
text = showdown.subParser('codeBlocks')(text, options, globals);
text = showdown.subParser('blockQuotes')(text, options, globals);
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// 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 = showdown.subParser('hashHTMLBlocks')(text, options, globals);
text = showdown.subParser('paragraphs')(text, options, globals);
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return text;
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});
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showdown.subParser('blockQuotes', function (text, options, globals) {
'use strict';
/*
text = text.replace(/
( // Wrap whole match in $1
(
^[ \t]*>[ \t]? // '>' at the start of a line
.+\n // rest of the first line
(.+\n)* // subsequent consecutive lines
\n* // blanks
)+
)
/gm, function(){...});
*/
text = text.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm, function (wholeMatch, m1) {
var bq = m1;
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// attacklab: hack around Konqueror 3.5.4 bug:
// "----------bug".replace(/^-/g,"") == "bug"
bq = bq.replace(/^[ \t]*>[ \t]?/gm, '~0'); // trim one level of quoting
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// attacklab: clean up hack
bq = bq.replace(/~0/g, '');
bq = bq.replace(/^[ \t]+$/gm, ''); // trim whitespace-only lines
bq = showdown.subParser('blockGamut')(bq, options, globals); // 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 showdown.subParser('hashBlock')('<blockquote>\n' + bq + '\n</blockquote>', options, globals);
});
return text;
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});
/**
* Process Markdown `<pre><code>` blocks.
*/
showdown.subParser('codeBlocks', function (text, options, globals) {
'use strict';
/*
text = text.replace(text,
/(?:\n\n|^)
( // $1 = the code block -- one or more lines, starting with a space/tab
(?:
(?:[ ]{4}|\t) // Lines must start with a tab or a tab-width of spaces - attacklab: g_tab_width
.*\n+
)+
)
(\n*[ ]{0,3}[^ \t\n]|(?=~0)) // attacklab: g_tab_width
/g,function(){...});
*/
// attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
text += '~0';
var pattern = /(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g;
text = text.replace(pattern, function (wholeMatch, m1, m2) {
var codeblock = m1,
nextChar = m2,
end = '\n';
codeblock = showdown.subParser('outdent')(codeblock);
codeblock = showdown.subParser('encodeCode')(codeblock);
codeblock = showdown.subParser('detab')(codeblock);
codeblock = codeblock.replace(/^\n+/g, ''); // trim leading newlines
codeblock = codeblock.replace(/\n+$/g, ''); // trim trailing newlines
if (options.omitExtraWLInCodeBlocks) {
end = '';
}
codeblock = '<pre><code>' + codeblock + end + '</code></pre>';
return showdown.subParser('hashBlock')(codeblock, options, globals) + nextChar;
});
// attacklab: strip sentinel
text = text.replace(/~0/, '');
return text;
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});
/**
*
* * 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> ...
*/
showdown.subParser('codeSpans', function (text) {
'use strict';
/*
text = text.replace(/
(^|[^\\]) // Character before opening ` can't be a backslash
(`+) // $2 = Opening run of `
( // $3 = The code block
[^\r]*?
[^`] // attacklab: work around lack of lookbehind
)
\2 // Matching closer
(?!`)
/gm, function(){...});
*/
text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm, function (wholeMatch, m1, m2, m3) {
var c = m3;
c = c.replace(/^([ \t]*)/g, ''); // leading whitespace
c = c.replace(/[ \t]*$/g, ''); // trailing whitespace
c = showdown.subParser('encodeCode')(c);
return m1 + '<code>' + c + '</code>';
});
return text;
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});
/**
* Convert all tabs to spaces
*/
showdown.subParser('detab', function (text) {
'use strict';
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// expand first n-1 tabs
text = text.replace(/\t(?=\t)/g, ' '); // g_tab_width
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// replace the nth with two sentinels
text = text.replace(/\t/g, '~A~B');
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// use the sentinel to anchor our regex so it doesn't explode
text = text.replace(/~B(.+?)~A/g, function (wholeMatch, m1) {
var leadingText = m1,
numSpaces = 4 - leadingText.length % 4; // g_tab_width
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// there *must* be a better way to do this:
for (var i = 0; i < numSpaces; i++) {
leadingText += ' ';
}
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return leadingText;
});
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// clean up sentinels
text = text.replace(/~A/g, ' '); // g_tab_width
text = text.replace(/~B/g, '');
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return text;
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});
/**
* Smart processing for ampersands and angle brackets that need to be encoded.
*/
showdown.subParser('encodeAmpsAndAngles', function (text) {
'use strict';
// 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, '&amp;');
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// Encode naked <'s
text = text.replace(/<(?![a-z\/?\$!])/gi, '&lt;');
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return text;
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});
/**
* 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.
*/
showdown.subParser('encodeBackslashEscapes', function (text) {
'use strict';
text = text.replace(/\\(\\)/g, showdown.helper.escapeCharactersCallback);
text = text.replace(/\\([`*_{}\[\]()>#+-.!])/g, showdown.helper.escapeCharactersCallback);
return text;
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});
/**
* Encode/escape certain characters inside Markdown code runs.
* The point is that in code, these characters are literals,
* and lose their special Markdown meanings.
*/
showdown.subParser('encodeCode', function (text) {
'use strict';
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// Encode all ampersands; HTML entities are not
// entities within a Markdown code span.
text = text.replace(/&/g, '&amp;');
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// Do the angle bracket song and dance:
text = text.replace(/</g, '&lt;');
text = text.replace(/>/g, '&gt;');
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// Now, escape characters that are magic in Markdown:
text = showdown.helper.escapeCharacters(text, '*_{}[]\\', false);
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// jj the line above breaks this:
//---
//* Item
// 1. Subitem
// special char: *
// ---
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return text;
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});
/**
* 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="&#x6D;&#97;&#105;&#108;&#x74;&#111;:&#102;&#111;&#111;&#64;&#101;
* x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;">&#102;&#111;&#111;
* &#64;&#101;x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;</a>
*
* Based on a filter by Matthew Wickline, posted to the BBEdit-Talk
* mailing list: <http://tinyurl.com/yu7ue>
*
*/
showdown.subParser('encodeEmailAddress', function (addr) {
'use strict';
var encode = [
function (ch) {
return '&#' + ch.charCodeAt(0) + ';';
},
function (ch) {
return '&#x' + ch.charCodeAt(0).toString(16) + ';';
},
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 > 0.9 ? encode[2](ch) : r > 0.45 ? encode[1](ch) : encode[0](ch)
);
}
return ch;
});
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addr = '<a href="' + addr + '">' + addr + '</a>';
addr = addr.replace(/">.+:/g, '">'); // strip the mailto: from the visible part
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return addr;
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});
/**
* Within tags -- meaning between < and > -- encode [\ ` * _] so they
* don't conflict with their use in Markdown for code, italics and strong.
*/
showdown.subParser('escapeSpecialCharsWithinTagAttributes', function (text) {
'use strict';
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// Build a regex to find HTML tags and comments. See Friedl's
// "Mastering Regular Expressions", 2nd Ed., pp. 200-201.
var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--.*?--\s*)+>)/gi;
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text = text.replace(regex, function (wholeMatch) {
var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g, '$1`');
tag = showdown.helper.escapeCharacters(tag, '\\`*_', false);
return tag;
});
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return text;
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});
/**
* Handle github codeblocks prior to running HashHTML so that
* HTML contained within the codeblock gets escaped properly
* Example:
* ```ruby
* def hello_world(x)
* puts "Hello, #{x}"
* end
* ```
*/
showdown.subParser('githubCodeBlocks', function (text, options, globals) {
'use strict';
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text += '~0';
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text = text.replace(/(?:^|\n)```(.*)\n([\s\S]*?)\n```/g, function (wholeMatch, m1, m2) {
var language = m1,
codeblock = m2,
end = '\n';
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if (options.omitExtraWLInCodeBlocks) {
end = '';
}
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codeblock = showdown.subParser('encodeCode')(codeblock);
codeblock = showdown.subParser('detab')(codeblock);
codeblock = codeblock.replace(/^\n+/g, ''); // trim leading newlines
codeblock = codeblock.replace(/\n+$/g, ''); // trim trailing whitespace
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codeblock = '<pre><code' + (language ? ' class="' + language + '"' : '') + '>' + codeblock + end + '</code></pre>';
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return showdown.subParser('hashBlock')(codeblock, options, globals);
});
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// attacklab: strip sentinel
text = text.replace(/~0/, '');
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return text;
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});
showdown.subParser('hashBlock', function (text, options, globals) {
'use strict';
text = text.replace(/(^\n+|\n+$)/g, '');
return '\n\n~K' + (globals.gHtmlBlocks.push(text) - 1) + 'K\n\n';
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});
showdown.subParser('hashElement', function (text, options, globals) {
'use strict';
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return function (wholeMatch, m1) {
var blockText = m1;
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// Undo double lines
blockText = blockText.replace(/\n\n/g, '\n');
blockText = blockText.replace(/^\n/, '');
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// strip trailing blank lines
blockText = blockText.replace(/\n+$/g, '');
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// Replace the element text with a marker ("~KxK" where x is its key)
blockText = '\n\n~K' + (globals.gHtmlBlocks.push(blockText) - 1) + 'K\n\n';
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return blockText;
};
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});
showdown.subParser('hashHTMLBlocks', function (text, options, globals) {
'use strict';
// attacklab: Double up blank lines to reduce lookaround
text = text.replace(/\n/g, '\n\n');
// Hashify HTML blocks:
// We only want to do this for block-level HTML tags, such as headers,
// lists, and tables. That's because we still want to wrap <p>s around
// "paragraphs" that are wrapped in non-block-level tags, such as anchors,
// phrase emphasis, and spans. The list of tags we're looking for is
// hard-coded:
//var block_tags_a =
// 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del|style|section|header|footer|nav|article|aside';
// var block_tags_b =
// 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|style|section|header|footer|nav|article|aside';
// First, look for nested blocks, e.g.:
// <div>
// <div>
// tags for inner block must be indented.
// </div>
// </div>
//
// The outermost tags must start at the left margin for this to match, and
// the inner nested divs must be indented.
// We need to do this before the next, more liberal match, because the next
// match will start at the first `<div>` and stop at the first `</div>`.
// attacklab: This regex can be expensive when it fails.
/*
var text = text.replace(/
( // save in $1
^ // start of line (with /m)
<($block_tags_a) // start tag = $2
\b // word break
// attacklab: hack around khtml/pcre bug...
[^\r]*?\n // any number of lines, minimally matching
</\2> // the matching end tag
[ \t]* // trailing spaces/tabs
(?=\n+) // followed by a newline
) // attacklab: there are sentinel newlines at end of document
/gm,function(){...}};
*/
text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del)\b[^\r]*?\n<\/\2>[ \t]*(?=\n+))/gm,
showdown.subParser('hashElement')(text, options, globals));
//
// Now match more liberally, simply from `\n<tag>` to `</tag>\n`
//
/*
var text = text.replace(/
( // save in $1
^ // start of line (with /m)
<($block_tags_b) // start tag = $2
\b // word break
// attacklab: hack around khtml/pcre bug...
[^\r]*? // any number of lines, minimally matching
</\2> // the matching end tag
[ \t]* // trailing spaces/tabs
(?=\n+) // followed by a newline
) // attacklab: there are sentinel newlines at end of document
/gm,function(){...}};
*/
text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|style|section|header|footer|nav|article|aside|address|audio|canvas|figure|hgroup|output|video)\b[^\r]*?<\/\2>[ \t]*(?=\n+)\n)/gm,
showdown.subParser('hashElement')(text, options, globals));
// Special case just for <hr />. It was easier to make a special case than
// to make the other regex more complicated.
/*
text = text.replace(/
( // save in $1
\n\n // Starting after a blank line
[ ]{0,3}
(<(hr) // start tag = $2
\b // word break
([^<>])*? //
\/?>) // the matching end tag
[ \t]*
(?=\n{2,}) // followed by a blank line
)
/g,showdown.subParser('hashElement')(text, options, globals));
*/
text = text.replace(/(\n[ ]{0,3}(<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g,
showdown.subParser('hashElement')(text, options, globals));
// Special case for standalone HTML comments:
/*
text = text.replace(/
( // save in $1
\n\n // Starting after a blank line
[ ]{0,3} // attacklab: g_tab_width - 1
<!
(--[^\r]*?--\s*)+
>
[ \t]*
(?=\n{2,}) // followed by a blank line
)
/g,showdown.subParser('hashElement')(text, options, globals));
*/
text = text.replace(/(\n\n[ ]{0,3}<!(--[^\r]*?--\s*)+>[ \t]*(?=\n{2,}))/g,
showdown.subParser('hashElement')(text, options, globals));
// 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,showdown.subParser('hashElement')(text, options, globals));
*/
text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,
showdown.subParser('hashElement')(text, options, globals));
// attacklab: Undo double lines (see comment at top of this function)
text = text.replace(/\n\n/g, '\n');
return text;
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});
showdown.subParser('headers', function (text, options, globals) {
'use strict';
var prefixHeader = options.prefixHeaderId;
// Set text-style headers:
// Header 1
// ========
//
// Header 2
// --------
//
text = text.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm, function (wholeMatch, m1) {
var spanGamut = showdown.subParser('spanGamut')(m1, options, globals),
hashBlock = '<h1 id="' + headerId(m1) + '">' + spanGamut + '</h1>';
return showdown.subParser('hashBlock')(hashBlock, options, globals);
});
text = text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm, function (matchFound, m1) {
var spanGamut = showdown.subParser('spanGamut')(m1, options, globals),
hashBlock = '<h2 id="' + headerId(m1) + '">' + spanGamut + '</h2>';
return showdown.subParser('hashBlock')(hashBlock, options, globals);
});
// 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 span = showdown.subParser('spanGamut')(m2, options, globals),
header = '<h' + m1.length + ' id="' + headerId(m2) + '">' + span + '</h' + m1.length + '>';
return showdown.subParser('hashBlock')(header, options, globals);
});
function headerId(m) {
var title, escapedId = m.replace(/[^\w]/g, '').toLowerCase();
if (globals.hashLinkCounts[escapedId]) {
title = escapedId + '-' + (globals.hashLinkCounts[escapedId]++);
} else {
title = escapedId;
globals.hashLinkCounts[escapedId] = 1;
}
// Prefix id to prevent causing inadvertent pre-existing style matches.
if (prefixHeader === true) {
prefixHeader = 'section';
}
if (showdown.helper.isString(prefixHeader)) {
return prefixHeader + title;
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}
return title;
}
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return text;
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});
/**
* Turn Markdown image shortcuts into <img> tags.
*/
showdown.subParser('images', function (text, options, globals) {
'use strict';
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var writeImageTag = function (wholeMatch, m1, m2, m3, m4, m5, m6, m7) {
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wholeMatch = m1;
var altText = m2,
linkId = m3.toLowerCase(),
url = m4,
title = m7,
gUrls = globals.gUrls,
gTitles = globals.gTitles;
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if (!title) {
title = '';
}
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if (url === '' || url === null) {
if (linkId === '' || linkId === null) {
// lower-case and turn embedded newlines into spaces
linkId = altText.toLowerCase().replace(/ ?\n/g, ' ');
}
url = '#' + linkId;
if (typeof gUrls[linkId] !== 'undefined') {
url = gUrls[linkId];
if (typeof gTitles[linkId] !== 'undefined') {
title = gTitles[linkId];
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}
} else {
return wholeMatch;
}
}
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altText = altText.replace(/"/g, '&quot;');
url = showdown.helper.escapeCharacters(url, '*_', false);
var result = '<img src="' + url + '" alt="' + altText + '"';
// attacklab: Markdown.pl adds empty title attributes to images.
// Replicate this bug.
//if (title != "") {
title = title.replace(/"/g, '&quot;');
title = showdown.helper.escapeCharacters(title, '*_', false);
result += ' title="' + title + '"';
//}
result += ' />';
return result;
};
// 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: ![alt text](url "optional title")
// 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;
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});
showdown.subParser('italicsAndBold', function (text) {
'use strict';
// <strong> must go first:
text = text.replace(/(\*\*|__)(?=\S)([^\r]*?\S[*_]*)\1/g, '<strong>$2</strong>');
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text = text.replace(/(\*|_)(?=\S)([^\r]*?\S)\1/g, '<em>$2</em>');
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return text;
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});
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/**
* Run language extensions
*/
showdown.subParser('languageExtensions', function (text, config, globals) {
'use strict';
showdown.helper.forEach(globals.langExtensions, function (ext) {
text = showdown.subParser('runExtension')(ext, text);
});
return text;
});
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/**
* Form HTML ordered (numbered) and unordered (bulleted) lists.
*/
showdown.subParser('lists', function (text, options, globals) {
'use strict';
/**
* Process the contents of a single ordered or unordered list, splitting it
* into individual list items.
* @param {string} listStr
* @returns {string|*}
*/
var processListItems = function (listStr) {
// The $g_list_level global keeps track of when we're inside a list.
// Each time we enter a list, we increment it; when we leave a list,
// we decrement. If it's zero, we're not in a list anymore.
//
// We do this because when we're not inside a list, we want to treat
// something like this:
//
// I recommend upgrading to version
// 8. Oops, now this line is treated
// as a sub-list.
//
// As a single paragraph, despite the fact that the second line starts
// with a digit-period-space sequence.
//
// Whereas when we're inside a list (or sub-list), that line will be
// treated as the start of a sub-list. What a kludge, huh? This is
// an aspect of Markdown's syntax that's hard to parse perfectly
// without resorting to mind-reading. Perhaps the solution is to
// change the syntax rules such that sub-lists must start with a
// starting cardinal number; e.g. "1." or "a.".
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globals.gListLevel++;
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// trim trailing blank lines:
listStr = listStr.replace(/\n{2,}$/, '\n');
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// attacklab: add sentinel to emulate \z
listStr += '~0';
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/*
list_str = list_str.replace(/
(\n)? // leading line = $1
(^[ \t]*) // leading whitespace = $2
([*+-]|\d+[.]) [ \t]+ // list marker = $3
([^\r]+? // list item text = $4
(\n{1,2}))
(?= \n* (~0 | \2 ([*+-]|\d+[.]) [ \t]+))
/gm, function(){...});
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*/
listStr = listStr.replace(/(\n)?(^[ \t]*)([*+-]|\d+[.])[ \t]+([^\r]+?(\n{1,2}))(?=\n*(~0|\2([*+-]|\d+[.])[ \t]+))/gm,
function (wholeMatch, m1, m2, m3, m4) {
var item = showdown.subParser('outdent')(m4, options, globals);
//m1 - LeadingLine
if (m1 || (item.search(/\n{2,}/) > -1)) {
item = showdown.subParser('blockGamut')(item, options, globals);
} else {
// Recursion for sub-lists:
item = showdown.subParser('lists')(item, options, globals);
item = item.replace(/\n$/, ''); // chomp(item)
item = showdown.subParser('spanGamut')(item, options, globals);
}
return '<li>' + item + '</li>\n';
});
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// attacklab: strip sentinel
listStr = listStr.replace(/~0/g, '');
globals.gListLevel--;
return listStr;
};
// 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 wholeList = /^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;
if (globals.gListLevel) {
text = text.replace(wholeList, function (wholeMatch, m1, m2) {
var list = m1,
listType = (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 = '<' + listType + '>' + result + '</' + listType + '>\n';
return result;
});
} else {
wholeList = /(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g;
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text = text.replace(wholeList, function (wholeMatch, m1, m2, m3) {
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// Turn double returns into triple returns, so that we can make a
// paragraph for the last item in a list, if necessary:
var list = m2.replace(/\n{2,}/g, '\n\n\n'),
listType = (m3.search(/[*+-]/g) > -1) ? 'ul' : 'ol',
result = processListItems(list);
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return m1 + '<' + listType + '>\n' + result + '</' + listType + '>\n';
});
}
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// attacklab: strip sentinel
text = text.replace(/~0/, '');
return text;
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});
/**
* Remove one level of line-leading tabs or spaces
*/
showdown.subParser('outdent', function (text) {
'use strict';
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// attacklab: hack around Konqueror 3.5.4 bug:
// "----------bug".replace(/^-/g,"") == "bug"
text = text.replace(/^(\t|[ ]{1,4})/gm, '~0'); // attacklab: g_tab_width
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// attacklab: clean up hack
text = text.replace(/~0/g, '');
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return text;
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});
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/**
* Run language extensions
*/
showdown.subParser('outputModifiers', function (text, config, globals) {
'use strict';
showdown.helper.forEach(globals.outputModifiers, function (ext) {
text = showdown.subParser('runExtension')(ext, text);
});
return text;
});
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/**
*
*/
showdown.subParser('paragraphs', function (text, options, globals) {
'use strict';
// Strip leading and trailing lines:
text = text.replace(/^\n+/g, '');
text = text.replace(/\n+$/g, '');
var grafs = text.split(/\n{2,}/g),
grafsOut = [],
end = grafs.length; // Wrap <p> tags
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 = showdown.subParser('spanGamut')(str, options, globals);
str = str.replace(/^([ \t]*)/g, '<p>');
str += '</p>';
grafsOut.push(str);
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}
}
/** Unhashify HTML blocks */
end = grafsOut.length;
for (i = 0; i < end; i++) {
// if this is a marker for an html block...
while (grafsOut[i].search(/~K(\d+)K/) >= 0) {
var blockText = globals.gHtmlBlocks[RegExp.$1];
blockText = blockText.replace(/\$/g, '$$$$'); // Escape any dollar signs
grafsOut[i] = grafsOut[i].replace(/~K\d+K/, blockText);
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}
}
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return grafsOut.join('\n\n');
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});
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/**
* Run language extensions
*/
showdown.subParser('runExtension', function (ext, text) {
'use strict';
if (ext.regex) {
var re = new RegExp(ext.regex, 'g');
return text.replace(re, ext.replace);
} else if (ext.filter) {
return ext.filter(text);
}
});
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/**
* These are all the transformations that occur *within* block-level
* tags like paragraphs, headers, and list items.
*/
showdown.subParser('spanGamut', function (text, options, globals) {
'use strict';
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text = showdown.subParser('codeSpans')(text, options, globals);
text = showdown.subParser('escapeSpecialCharsWithinTagAttributes')(text, options, globals);
text = showdown.subParser('encodeBackslashEscapes')(text, options, globals);
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// Process anchor and image tags. Images must come first,
// because ![foo][f] looks like an anchor.
text = showdown.subParser('images')(text, options, globals);
text = showdown.subParser('anchors')(text, options, globals);
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// 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 = showdown.subParser('autoLinks')(text, options, globals);
text = showdown.subParser('encodeAmpsAndAngles')(text, options, globals);
text = showdown.subParser('italicsAndBold')(text, options, globals);
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// Do hard breaks:
text = text.replace(/ +\n/g, ' <br />\n');
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return text;
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});
/**
* Strip any lines consisting only of spaces and tabs.
* This makes subsequent regexs easier to write, because we can
* match consecutive blank lines with /\n+/ instead of something
* contorted like /[ \t]*\n+/
*/
showdown.subParser('stripBlankLines', function (text) {
'use strict';
return text.replace(/^[ \t]+$/mg, '');
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});
/**
* Strips link definitions from text, stores the URLs and titles in
* hash references.
* Link defs are in the form: ^[id]: url "optional title"
*
* ^[ ]{0,3}\[(.+)\]: // id = $1 attacklab: g_tab_width - 1
* [ \t]*
* \n? // maybe *one* newline
* [ \t]*
* <?(\S+?)>? // url = $2
* [ \t]*
* \n? // maybe one newline
* [ \t]*
* (?:
* (\n*) // any lines skipped = $3 attacklab: lookbehind removed
* ["(]
* (.+?) // title = $4
* [")]
* [ \t]*
* )? // title is optional
* (?:\n+|$)
* /gm,
* function(){...});
*
*/
showdown.subParser('stripLinkDefinitions', function (text, options, globals) {
'use strict';
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var regex = /^[ ]{0,3}\[(.+)]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|(?=~0))/gm;
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// attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
text += '~0';
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text = text.replace(regex, function (wholeMatch, m1, m2, m3, m4) {
m1 = m1.toLowerCase();
globals.gUrls[m1] = showdown.subParser('encodeAmpsAndAngles')(m2); // Link IDs are case-insensitive
if (m3) {
// Oops, found blank lines, so it's not a title.
// Put back the parenthetical statement we stole.
return m3 + m4;
} else if (m4) {
globals.gTitles[m1] = m4.replace(/"/g, '&quot;');
}
// Completely remove the definition from the text
return '';
});
// attacklab: strip sentinel
text = text.replace(/~0/, '');
return text;
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});
/**
* Swap back in all the special characters we've hidden.
*/
showdown.subParser('unescapeSpecialChars', function (text) {
'use strict';
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text = text.replace(/~E(\d+)E/g, function (wholeMatch, m1) {
var charCodeToReplace = parseInt(m1);
return String.fromCharCode(charCodeToReplace);
});
return text;
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});
var root = this;
// CommonJS/nodeJS Loader
if (typeof module !== 'undefined' && module.exports) {
module.exports = showdown;
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// AMD Loader
} else if (typeof define === 'function' && define.amd) {
define('showdown', function () {
'use strict';
return showdown;
});
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// Regular Browser loader
} else {
root.showdown = showdown;
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}
}).call(this);
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//# sourceMappingURL=showdown.js.map