www.gusucode.com > wxApp PHP版微信小程序CMS系统 v1.0PHP源码程序 > wxApp PHP版微信小程序CMS系统 v1.0/wxAppCMS_v1.0.0/wxAppCMS_v1.0.0/template/wxapp/wxParse/showdown.js
/**
*
* showdown: https://github.com/showdownjs/showdown
*
* author: Di (微信小程序开发工程师)
* organization: WeAppDev(微信小程序开发论坛)(http://weappdev.com)
* 垂直微信小程序开发交流社区
*
* github地址: https://github.com/icindy/wxParse
*
* for: 微信小程序富文本解析
* detail : http://weappdev.com/t/wxparse-alpha0-1-html-markdown/184
*/
function getDefaultOpts(simple) {
'use strict';
var defaultOptions = {
omitExtraWLInCodeBlocks: {
defaultValue: false,
describe: 'Omit the default extra whiteline added to code blocks',
type: 'boolean'
},
noHeaderId: {
defaultValue: false,
describe: 'Turn on/off generated header id',
type: 'boolean'
},
prefixHeaderId: {
defaultValue: false,
describe: 'Specify a prefix to generated header ids',
type: 'string'
},
headerLevelStart: {
defaultValue: false,
describe: 'The header blocks level start',
type: 'integer'
},
parseImgDimensions: {
defaultValue: false,
describe: 'Turn on/off image dimension parsing',
type: 'boolean'
},
simplifiedAutoLink: {
defaultValue: false,
describe: 'Turn on/off GFM autolink style',
type: 'boolean'
},
literalMidWordUnderscores: {
defaultValue: false,
describe: 'Parse midword underscores as literal underscores',
type: 'boolean'
},
strikethrough: {
defaultValue: false,
describe: 'Turn on/off strikethrough support',
type: 'boolean'
},
tables: {
defaultValue: false,
describe: 'Turn on/off tables support',
type: 'boolean'
},
tablesHeaderId: {
defaultValue: false,
describe: 'Add an id to table headers',
type: 'boolean'
},
ghCodeBlocks: {
defaultValue: true,
describe: 'Turn on/off GFM fenced code blocks support',
type: 'boolean'
},
tasklists: {
defaultValue: false,
describe: 'Turn on/off GFM tasklist support',
type: 'boolean'
},
smoothLivePreview: {
defaultValue: false,
describe: 'Prevents weird effects in live previews due to incomplete input',
type: 'boolean'
},
smartIndentationFix: {
defaultValue: false,
description: 'Tries to smartly fix identation in es6 strings',
type: 'boolean'
}
};
if (simple === false) {
return JSON.parse(JSON.stringify(defaultOptions));
}
var ret = {};
for (var opt in defaultOptions) {
if (defaultOptions.hasOwnProperty(opt)) {
ret[opt] = defaultOptions[opt].defaultValue;
}
}
return ret;
}
/**
* Created by Tivie on 06-01-2015.
*/
// Private properties
var showdown = {},
parsers = {},
extensions = {},
globalOptions = getDefaultOpts(true),
flavor = {
github: {
omitExtraWLInCodeBlocks: true,
prefixHeaderId: 'user-content-',
simplifiedAutoLink: true,
literalMidWordUnderscores: true,
strikethrough: true,
tables: true,
tablesHeaderId: true,
ghCodeBlocks: true,
tasklists: true
},
vanilla: getDefaultOpts(true)
};
/**
* helper namespace
* @type {{}}
*/
showdown.helper = {};
/**
* TODO LEGACY SUPPORT CODE
* @type {{}}
*/
showdown.extensions = {};
/**
* Set a global option
* @static
* @param {string} key
* @param {*} value
* @returns {showdown}
*/
showdown.setOption = function(key, value) {
'use strict';
globalOptions[key] = value;
return this;
};
/**
* Get a global option
* @static
* @param {string} key
* @returns {*}
*/
showdown.getOption = function(key) {
'use strict';
return globalOptions[key];
};
/**
* Get the global options
* @static
* @returns {{}}
*/
showdown.getOptions = function() {
'use strict';
return globalOptions;
};
/**
* Reset global options to the default values
* @static
*/
showdown.resetOptions = function() {
'use strict';
globalOptions = getDefaultOpts(true);
};
/**
* Set the flavor showdown should use as default
* @param {string} name
*/
showdown.setFlavor = function(name) {
'use strict';
if (flavor.hasOwnProperty(name)) {
var preset = flavor[name];
for (var option in preset) {
if (preset.hasOwnProperty(option)) {
globalOptions[option] = preset[option];
}
}
}
};
/**
* Get the default options
* @static
* @param {boolean} [simple=true]
* @returns {{}}
*/
showdown.getDefaultOptions = function(simple) {
'use strict';
return getDefaultOpts(simple);
};
/**
* Get or set a subParser
*
* subParser(name) - Get a registered subParser
* subParser(name, func) - Register a subParser
* @static
* @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!');
}
}
}
};
/**
* Gets or registers an extension
* @static
* @param {string} name
* @param {object|function=} ext
* @returns {*}
*/
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);
// Getter
if (showdown.helper.isUndefined(ext)) {
if (!extensions.hasOwnProperty(name)) {
throw Error('Extension named ' + name + ' is not registered!');
}
return extensions[name];
// Setter
} else {
// Expand extension if it's wrapped in a function
if (typeof ext === 'function') {
ext = ext();
}
// Ensure extension is an array
if (!showdown.helper.isArray(ext)) {
ext = [ext];
}
var validExtension = validate(ext, name);
if (validExtension.valid) {
extensions[name] = ext;
} else {
throw Error(validExtension.error);
}
}
};
/**
* Gets all extensions registered
* @returns {{}}
*/
showdown.getAllExtensions = function() {
'use strict';
return extensions;
};
/**
* Remove an extension
* @param {string} name
*/
showdown.removeExtension = function(name) {
'use strict';
delete extensions[name];
};
/**
* Removes all extensions
*/
showdown.resetExtensions = function() {
'use strict';
extensions = {};
};
/**
* Validate extension
* @param {array} extension
* @param {string} name
* @returns {{valid: boolean, error: string}}
*/
function validate(extension, name) {
'use strict';
var errMsg = (name) ? 'Error in ' + name + ' extension->' : 'Error in unnamed extension',
ret = {
valid: true,
error: ''
};
if (!showdown.helper.isArray(extension)) {
extension = [extension];
}
for (var i = 0; i < extension.length; ++i) {
var baseMsg = errMsg + ' sub-extension ' + i + ': ',
ext = extension[i];
if (typeof ext !== 'object') {
ret.valid = false;
ret.error = baseMsg + 'must be an object, but ' + typeof ext + ' given';
return ret;
}
if (!showdown.helper.isString(ext.type)) {
ret.valid = false;
ret.error = baseMsg + 'property "type" must be a string, but ' + typeof ext.type + ' given';
return ret;
}
var type = ext.type = ext.type.toLowerCase();
// normalize extension type
if (type === 'language') {
type = ext.type = 'lang';
}
if (type === 'html') {
type = ext.type = 'output';
}
if (type !== 'lang' && type !== 'output' && type !== 'listener') {
ret.valid = false;
ret.error = baseMsg + 'type ' + type + ' is not recognized. Valid values: "lang/language", "output/html" or "listener"';
return ret;
}
if (type === 'listener') {
if (showdown.helper.isUndefined(ext.listeners)) {
ret.valid = false;
ret.error = baseMsg + '. Extensions of type "listener" must have a property called "listeners"';
return ret;
}
} else {
if (showdown.helper.isUndefined(ext.filter) && showdown.helper.isUndefined(ext.regex)) {
ret.valid = false;
ret.error = baseMsg + type + ' extensions must define either a "regex" property or a "filter" method';
return ret;
}
}
if (ext.listeners) {
if (typeof ext.listeners !== 'object') {
ret.valid = false;
ret.error = baseMsg + '"listeners" property must be an object but ' + typeof ext.listeners + ' given';
return ret;
}
for (var ln in ext.listeners) {
if (ext.listeners.hasOwnProperty(ln)) {
if (typeof ext.listeners[ln] !== 'function') {
ret.valid = false;
ret.error = baseMsg + '"listeners" property must be an hash of [event name]: [callback]. listeners.' + ln +
' must be a function but ' + typeof ext.listeners[ln] + ' given';
return ret;
}
}
}
}
if (ext.filter) {
if (typeof ext.filter !== 'function') {
ret.valid = false;
ret.error = baseMsg + '"filter" must be a function, but ' + typeof ext.filter + ' given';
return ret;
}
} else if (ext.regex) {
if (showdown.helper.isString(ext.regex)) {
ext.regex = new RegExp(ext.regex, 'g');
}
if (!ext.regex instanceof RegExp) {
ret.valid = false;
ret.error = baseMsg + '"regex" property must either be a string or a RegExp object, but ' + typeof ext.regex + ' given';
return ret;
}
if (showdown.helper.isUndefined(ext.replace)) {
ret.valid = false;
ret.error = baseMsg + '"regex" extensions must implement a replace string or function';
return ret;
}
}
}
return ret;
}
/**
* Validate extension
* @param {object} ext
* @returns {boolean}
*/
showdown.validateExtension = function(ext) {
'use strict';
var validateExtension = validate(ext, null);
if (!validateExtension.valid) {
console.warn(validateExtension.error);
return false;
}
return true;
};
/**
* showdownjs helper functions
*/
if (!showdown.hasOwnProperty('helper')) {
showdown.helper = {};
}
/**
* Check if var is string
* @static
* @param {string} a
* @returns {boolean}
*/
showdown.helper.isString = function isString(a) {
'use strict';
return (typeof a === 'string' || a instanceof String);
};
/**
* Check if var is a function
* @static
* @param {string} a
* @returns {boolean}
*/
showdown.helper.isFunction = function isFunction(a) {
'use strict';
var getType = {};
return a && getType.toString.call(a) === '[object Function]';
};
/**
* ForEach helper function
* @static
* @param {*} obj
* @param {function} callback
*/
showdown.helper.forEach = function forEach(obj, callback) {
'use strict';
if (typeof obj.forEach === 'function') {
obj.forEach(callback);
} else {
for (var i = 0; i < obj.length; i++) {
callback(obj[i], i, obj);
}
}
};
/**
* isArray helper function
* @static
* @param {*} a
* @returns {boolean}
*/
showdown.helper.isArray = function isArray(a) {
'use strict';
return a.constructor === Array;
};
/**
* 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';
};
/**
* 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';
}
/**
* Callback used to escape characters when passing through String.replace
* @static
* @param {string} wholeMatch
* @param {string} m1
* @returns {string}
*/
showdown.helper.escapeCharactersCallback = escapeCharactersCallback;
/**
* Escape characters in a string
* @static
* @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') + '])';
if (afterBackslash) {
regexString = '\\\\' + regexString;
}
var regex = new RegExp(regexString, 'g');
text = text.replace(regex, escapeCharactersCallback);
return text;
};
var rgxFindMatchPos = function(str, left, right, flags) {
'use strict';
var f = flags || '',
g = f.indexOf('g') > -1,
x = new RegExp(left + '|' + right, 'g' + f.replace(/g/g, '')),
l = new RegExp(left, f.replace(/g/g, '')),
pos = [],
t, s, m, start, end;
do {
t = 0;
while ((m = x.exec(str))) {
if (l.test(m[0])) {
if (!(t++)) {
s = x.lastIndex;
start = s - m[0].length;
}
} else if (t) {
if (!--t) {
end = m.index + m[0].length;
var obj = {
left: { start: start, end: s },
match: { start: s, end: m.index },
right: { start: m.index, end: end },
wholeMatch: { start: start, end: end }
};
pos.push(obj);
if (!g) {
return pos;
}
}
}
}
} while (t && (x.lastIndex = s));
return pos;
};
/**
* matchRecursiveRegExp
*
* (c) 2007 Steven Levithan <stevenlevithan.com>
* MIT License
*
* Accepts a string to search, a left and right format delimiter
* as regex patterns, and optional regex flags. Returns an array
* of matches, allowing nested instances of left/right delimiters.
* Use the "g" flag to return all matches, otherwise only the
* first is returned. Be careful to ensure that the left and
* right format delimiters produce mutually exclusive matches.
* Backreferences are not supported within the right delimiter
* due to how it is internally combined with the left delimiter.
* When matching strings whose format delimiters are unbalanced
* to the left or right, the output is intentionally as a
* conventional regex library with recursion support would
* produce, e.g. "<<x>" and "<x>>" both produce ["x"] when using
* "<" and ">" as the delimiters (both strings contain a single,
* balanced instance of "<x>").
*
* examples:
* matchRecursiveRegExp("test", "\\(", "\\)")
* returns: []
* matchRecursiveRegExp("<t<<e>><s>>t<>", "<", ">", "g")
* returns: ["t<<e>><s>", ""]
* matchRecursiveRegExp("<div id=\"x\">test</div>", "<div\\b[^>]*>", "</div>", "gi")
* returns: ["test"]
*/
showdown.helper.matchRecursiveRegExp = function(str, left, right, flags) {
'use strict';
var matchPos = rgxFindMatchPos(str, left, right, flags),
results = [];
for (var i = 0; i < matchPos.length; ++i) {
results.push([
str.slice(matchPos[i].wholeMatch.start, matchPos[i].wholeMatch.end),
str.slice(matchPos[i].match.start, matchPos[i].match.end),
str.slice(matchPos[i].left.start, matchPos[i].left.end),
str.slice(matchPos[i].right.start, matchPos[i].right.end)
]);
}
return results;
};
/**
*
* @param {string} str
* @param {string|function} replacement
* @param {string} left
* @param {string} right
* @param {string} flags
* @returns {string}
*/
showdown.helper.replaceRecursiveRegExp = function(str, replacement, left, right, flags) {
'use strict';
if (!showdown.helper.isFunction(replacement)) {
var repStr = replacement;
replacement = function() {
return repStr;
};
}
var matchPos = rgxFindMatchPos(str, left, right, flags),
finalStr = str,
lng = matchPos.length;
if (lng > 0) {
var bits = [];
if (matchPos[0].wholeMatch.start !== 0) {
bits.push(str.slice(0, matchPos[0].wholeMatch.start));
}
for (var i = 0; i < lng; ++i) {
bits.push(
replacement(
str.slice(matchPos[i].wholeMatch.start, matchPos[i].wholeMatch.end),
str.slice(matchPos[i].match.start, matchPos[i].match.end),
str.slice(matchPos[i].left.start, matchPos[i].left.end),
str.slice(matchPos[i].right.start, matchPos[i].right.end)
)
);
if (i < lng - 1) {
bits.push(str.slice(matchPos[i].wholeMatch.end, matchPos[i + 1].wholeMatch.start));
}
}
if (matchPos[lng - 1].wholeMatch.end < str.length) {
bits.push(str.slice(matchPos[lng - 1].wholeMatch.end));
}
finalStr = bits.join('');
}
return finalStr;
};
/**
* POLYFILLS
*/
if (showdown.helper.isUndefined(console)) {
console = {
warn: function(msg) {
'use strict';
alert(msg);
},
log: function(msg) {
'use strict';
alert(msg);
},
error: function(msg) {
'use strict';
throw msg;
}
};
}
/**
* Created by Estevao on 31-05-2015.
*/
/**
* Showdown Converter class
* @class
* @param {object} [converterOptions]
* @returns {Converter}
*/
showdown.Converter = function(converterOptions) {
'use strict';
var
/**
* Options used by this converter
* @private
* @type {{}}
*/
options = {},
/**
* Language extensions used by this converter
* @private
* @type {Array}
*/
langExtensions = [],
/**
* Output modifiers extensions used by this converter
* @private
* @type {Array}
*/
outputModifiers = [],
/**
* Event listeners
* @private
* @type {{}}
*/
listeners = {};
_constructor();
/**
* Converter constructor
* @private
*/
function _constructor() {
converterOptions = converterOptions || {};
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];
}
}
} else {
throw Error('Converter expects the passed parameter to be an object, but ' + typeof converterOptions +
' was passed instead.');
}
if (options.extensions) {
showdown.helper.forEach(options.extensions, _parseExtension);
}
}
/**
* Parse extension
* @param {*} ext
* @param {string} [name='']
* @private
*/
function _parseExtension(ext, name) {
name = name || null;
// If it's a string, the extension was previously loaded
if (showdown.helper.isString(ext)) {
ext = showdown.helper.stdExtName(ext);
name = ext;
// LEGACY_SUPPORT CODE
if (showdown.extensions[ext]) {
console.warn('DEPRECATION WARNING: ' + ext + ' is an old extension that uses a deprecated loading method.' +
'Please inform the developer that the extension should be updated!');
legacyExtensionLoading(showdown.extensions[ext], ext);
return;
// END LEGACY SUPPORT CODE
} else if (!showdown.helper.isUndefined(extensions[ext])) {
ext = extensions[ext];
} else {
throw Error('Extension "' + ext + '" could not be loaded. It was either not found or is not a valid extension.');
}
}
if (typeof ext === 'function') {
ext = ext();
}
if (!showdown.helper.isArray(ext)) {
ext = [ext];
}
var validExt = validate(ext, name);
if (!validExt.valid) {
throw Error(validExt.error);
}
for (var i = 0; i < ext.length; ++i) {
switch (ext[i].type) {
case 'lang':
langExtensions.push(ext[i]);
break;
case 'output':
outputModifiers.push(ext[i]);
break;
}
if (ext[i].hasOwnProperty(listeners)) {
for (var ln in ext[i].listeners) {
if (ext[i].listeners.hasOwnProperty(ln)) {
listen(ln, ext[i].listeners[ln]);
}
}
}
}
}
/**
* LEGACY_SUPPORT
* @param {*} ext
* @param {string} name
*/
function legacyExtensionLoading(ext, name) {
if (typeof ext === 'function') {
ext = ext(new showdown.Converter());
}
if (!showdown.helper.isArray(ext)) {
ext = [ext];
}
var valid = validate(ext, name);
if (!valid.valid) {
throw Error(valid.error);
}
for (var i = 0; i < ext.length; ++i) {
switch (ext[i].type) {
case 'lang':
langExtensions.push(ext[i]);
break;
case 'output':
outputModifiers.push(ext[i]);
break;
default: // should never reach here
throw Error('Extension loader error: Type unrecognized!!!');
}
}
}
/**
* Listen to an event
* @param {string} name
* @param {function} callback
*/
function listen(name, callback) {
if (!showdown.helper.isString(name)) {
throw Error('Invalid argument in converter.listen() method: name must be a string, but ' + typeof name + ' given');
}
if (typeof callback !== 'function') {
throw Error('Invalid argument in converter.listen() method: callback must be a function, but ' + typeof callback + ' given');
}
if (!listeners.hasOwnProperty(name)) {
listeners[name] = [];
}
listeners[name].push(callback);
}
function rTrimInputText(text) {
var rsp = text.match(/^\s*/)[0].length,
rgx = new RegExp('^\\s{0,' + rsp + '}', 'gm');
return text.replace(rgx, '');
}
/**
* Dispatch an event
* @private
* @param {string} evtName Event name
* @param {string} text Text
* @param {{}} options Converter Options
* @param {{}} globals
* @returns {string}
*/
this._dispatch = function dispatch(evtName, text, options, globals) {
if (listeners.hasOwnProperty(evtName)) {
for (var ei = 0; ei < listeners[evtName].length; ++ei) {
var nText = listeners[evtName][ei](evtName, text, this, options, globals);
if (nText && typeof nText !== 'undefined') {
text = nText;
}
}
}
return text;
};
/**
* Listen to an event
* @param {string} name
* @param {function} callback
* @returns {showdown.Converter}
*/
this.listen = function(name, callback) {
listen(name, callback);
return this;
};
/**
* Converts a markdown string into HTML
* @param {string} text
* @returns {*}
*/
this.makeHtml = function(text) {
//check if text is not falsy
if (!text) {
return text;
}
var globals = {
gHtmlBlocks: [],
gHtmlMdBlocks: [],
gHtmlSpans: [],
gUrls: {},
gTitles: {},
gDimensions: {},
gListLevel: 0,
hashLinkCounts: {},
langExtensions: langExtensions,
outputModifiers: outputModifiers,
converter: this,
ghCodeBlocks: []
};
// 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');
// 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
if (options.smartIndentationFix) {
text = rTrimInputText(text);
}
// Make sure text begins and ends with a couple of newlines:
//text = '\n\n' + text + '\n\n';
text = text;
// detab
text = showdown.subParser('detab')(text, options, globals);
// stripBlankLines
text = showdown.subParser('stripBlankLines')(text, options, globals);
//run languageExtensions
showdown.helper.forEach(langExtensions, function(ext) {
text = showdown.subParser('runExtension')(ext, text, options, globals);
});
// run the sub parsers
text = showdown.subParser('hashPreCodeTags')(text, options, globals);
text = showdown.subParser('githubCodeBlocks')(text, options, globals);
text = showdown.subParser('hashHTMLBlocks')(text, options, globals);
text = showdown.subParser('hashHTMLSpans')(text, options, globals);
text = showdown.subParser('stripLinkDefinitions')(text, options, globals);
text = showdown.subParser('blockGamut')(text, options, globals);
text = showdown.subParser('unhashHTMLSpans')(text, options, globals);
text = showdown.subParser('unescapeSpecialChars')(text, options, globals);
// attacklab: Restore dollar signs
text = text.replace(/~D/g, '$$');
// attacklab: Restore tildes
text = text.replace(/~T/g, '~');
// Run output modifiers
showdown.helper.forEach(outputModifiers, function(ext) {
text = showdown.subParser('runExtension')(ext, text, options, globals);
});
return text;
};
/**
* Set an option of this Converter instance
* @param {string} key
* @param {*} value
*/
this.setOption = function(key, value) {
options[key] = value;
};
/**
* Get the option of this Converter instance
* @param {string} key
* @returns {*}
*/
this.getOption = function(key) {
return options[key];
};
/**
* Get the options of this Converter instance
* @returns {{}}
*/
this.getOptions = function() {
return options;
};
/**
* Add extension to THIS converter
* @param {{}} extension
* @param {string} [name=null]
*/
this.addExtension = function(extension, name) {
name = name || null;
_parseExtension(extension, name);
};
/**
* Use a global registered extension with THIS converter
* @param {string} extensionName Name of the previously registered extension
*/
this.useExtension = function(extensionName) {
_parseExtension(extensionName);
};
/**
* Set the flavor THIS converter should use
* @param {string} name
*/
this.setFlavor = function(name) {
if (flavor.hasOwnProperty(name)) {
var preset = flavor[name];
for (var option in preset) {
if (preset.hasOwnProperty(option)) {
options[option] = preset[option];
}
}
}
};
/**
* Remove an extension from THIS converter.
* Note: This is a costly operation. It's better to initialize a new converter
* and specify the extensions you wish to use
* @param {Array} extension
*/
this.removeExtension = function(extension) {
if (!showdown.helper.isArray(extension)) {
extension = [extension];
}
for (var a = 0; a < extension.length; ++a) {
var ext = extension[a];
for (var i = 0; i < langExtensions.length; ++i) {
if (langExtensions[i] === ext) {
langExtensions[i].splice(i, 1);
}
}
for (var ii = 0; ii < outputModifiers.length; ++i) {
if (outputModifiers[ii] === ext) {
outputModifiers[ii].splice(i, 1);
}
}
}
};
/**
* Get all extension of THIS converter
* @returns {{language: Array, output: Array}}
*/
this.getAllExtensions = function() {
return {
language: langExtensions,
output: outputModifiers
};
};
};
/**
* Turn Markdown link shortcuts into XHTML <a> tags.
*/
showdown.subParser('anchors', function(text, options, globals) {
'use strict';
text = globals.converter._dispatch('anchors.before', text, options, globals);
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];
}
} else {
if (wholeMatch.search(/\(\s*\)$/m) > -1) {
// Special case for explicit empty url
url = '';
} else {
return wholeMatch;
}
}
}
url = showdown.helper.escapeCharacters(url, '*_', false);
var result = '<a href="' + url + '"';
if (title !== '' && title !== null) {
title = title.replace(/"/g, '"');
title = showdown.helper.escapeCharacters(title, '*_', false);
result += ' title="' + title + '"';
}
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);
text = globals.converter._dispatch('anchors.after', text, options, globals);
return text;
});
showdown.subParser('autoLinks', function(text, options, globals) {
'use strict';
text = globals.converter._dispatch('autoLinks.before', text, options, globals);
var simpleURLRegex = /\b(((https?|ftp|dict):\/\/|www\.)[^'">\s]+\.[^'">\s]+)(?=\s|$)(?!["<>])/gi,
delimUrlRegex = /<(((https?|ftp|dict):\/\/|www\.)[^'">\s]+)>/gi,
simpleMailRegex = /(?:^|[ \n\t])([A-Za-z0-9!#$%&'*+-/=?^_`\{|}~\.]+@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)(?:$|[ \n\t])/gi,
delimMailRegex = /<(?:mailto:)?([-.\w]+@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi;
text = text.replace(delimUrlRegex, replaceLink);
text = text.replace(delimMailRegex, replaceMail);
// simpleURLRegex = /\b(((https?|ftp|dict):\/\/|www\.)[-.+~:?#@!$&'()*,;=[\]\w]+)\b/gi,
// Email addresses: <address@domain.foo>
if (options.simplifiedAutoLink) {
text = text.replace(simpleURLRegex, replaceLink);
text = text.replace(simpleMailRegex, replaceMail);
}
function replaceLink(wm, link) {
var lnkTxt = link;
if (/^www\./i.test(link)) {
link = link.replace(/^www\./i, 'http://www.');
}
return '<a href="' + link + '">' + lnkTxt + '</a>';
}
function replaceMail(wholeMatch, m1) {
var unescapedStr = showdown.subParser('unescapeSpecialChars')(m1);
return showdown.subParser('encodeEmailAddress')(unescapedStr);
}
text = globals.converter._dispatch('autoLinks.after', text, options, globals);
return text;
});
/**
* 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';
text = globals.converter._dispatch('blockGamut.before', text, options, globals);
// we parse blockquotes first so that we can have headings and hrs
// inside blockquotes
text = showdown.subParser('blockQuotes')(text, options, globals);
text = showdown.subParser('headers')(text, options, globals);
// 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);
text = showdown.subParser('lists')(text, options, globals);
text = showdown.subParser('codeBlocks')(text, options, globals);
text = showdown.subParser('tables')(text, options, globals);
// 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);
text = globals.converter._dispatch('blockGamut.after', text, options, globals);
return text;
});
showdown.subParser('blockQuotes', function(text, options, globals) {
'use strict';
text = globals.converter._dispatch('blockQuotes.before', text, options, globals);
/*
text = text.replace(/
( // Wrap whole match in $1
(
^[ \t]*>[ \t]? // '>' at the start of a line
.+\n // rest of the first line
(.+\n)* // subsequent consecutive lines
\n* // blanks
)+
)
/gm, function(){...});
*/
text = text.replace(/((^[ \t]{0,3}>[ \t]?.+\n(.+\n)*\n*)+)/gm, function(wholeMatch, m1) {
var bq = m1;
// attacklab: hack around Konqueror 3.5.4 bug:
// "----------bug".replace(/^-/g,"") == "bug"
bq = bq.replace(/^[ \t]*>[ \t]?/gm, '~0'); // trim one level of quoting
// attacklab: clean up hack
bq = bq.replace(/~0/g, '');
bq = bq.replace(/^[ \t]+$/gm, ''); // trim whitespace-only lines
bq = showdown.subParser('githubCodeBlocks')(bq, options, globals);
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);
});
text = globals.converter._dispatch('blockQuotes.after', text, options, globals);
return text;
});
/**
* Process Markdown `<pre><code>` blocks.
*/
showdown.subParser('codeBlocks', function(text, options, globals) {
'use strict';
text = globals.converter._dispatch('codeBlocks.before', text, options, globals);
/*
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/, '');
text = globals.converter._dispatch('codeBlocks.after', text, options, globals);
return 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> ...
*/
showdown.subParser('codeSpans', function(text, options, globals) {
'use strict';
text = globals.converter._dispatch('codeSpans.before', text, options, globals);
/*
text = text.replace(/
(^|[^\\]) // Character before opening ` can't be a backslash
(`+) // $2 = Opening run of `
( // $3 = The code block
[^\r]*?
[^`] // attacklab: work around lack of lookbehind
)
\2 // Matching closer
(?!`)
/gm, function(){...});
*/
if (typeof(text) === 'undefined') {
text = '';
}
text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,
function(wholeMatch, m1, m2, m3) {
var c = m3;
c = c.replace(/^([ \t]*)/g, ''); // leading whitespace
c = c.replace(/[ \t]*$/g, ''); // trailing whitespace
c = showdown.subParser('encodeCode')(c);
return m1 + '<code>' + c + '</code>';
}
);
text = globals.converter._dispatch('codeSpans.after', text, options, globals);
return text;
});
/**
* Convert all tabs to spaces
*/
showdown.subParser('detab', function(text) {
'use strict';
// expand first n-1 tabs
text = text.replace(/\t(?=\t)/g, ' '); // 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) {
var leadingText = m1,
numSpaces = 4 - leadingText.length % 4; // 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, ' '); // g_tab_width
text = text.replace(/~B/g, '');
return text;
});
/**
* 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, '&');
// Encode naked <'s
text = text.replace(/<(?![a-z\/?\$!])/gi, '<');
return text;
});
/**
* 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;
});
/**
* 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';
// 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 = showdown.helper.escapeCharacters(text, '*_{}[]\\', false);
// jj the line above breaks this:
//---
//* Item
// 1. Subitem
// special char: *
// ---
return text;
});
/**
* 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>
*
*/
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;
});
addr = '<a href="' + addr + '">' + addr + '</a>';
addr = addr.replace(/">.+:/g, '">'); // strip the mailto: from the visible part
return addr;
});
/**
* 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';
// 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;
text = text.replace(regex, function(wholeMatch) {
var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g, '$1`');
tag = showdown.helper.escapeCharacters(tag, '\\`*_', false);
return tag;
});
return text;
});
/**
* Handle github codeblocks prior to running HashHTML so that
* HTML contained within the codeblock gets escaped properly
* Example:
* ```ruby
* def hello_world(x)
* puts "Hello, #{x}"
* end
* ```
*/
showdown.subParser('githubCodeBlocks', function(text, options, globals) {
'use strict';
// early exit if option is not enabled
if (!options.ghCodeBlocks) {
return text;
}
text = globals.converter._dispatch('githubCodeBlocks.before', text, options, globals);
text += '~0';
text = text.replace(/(?:^|\n)```(.*)\n([\s\S]*?)\n```/g, function(wholeMatch, language, codeblock) {
var end = (options.omitExtraWLInCodeBlocks) ? '' : '\n';
// First parse the github code block
codeblock = showdown.subParser('encodeCode')(codeblock);
codeblock = showdown.subParser('detab')(codeblock);
codeblock = codeblock.replace(/^\n+/g, ''); // trim leading newlines
codeblock = codeblock.replace(/\n+$/g, ''); // trim trailing whitespace
codeblock = '<pre><code' + (language ? ' class="' + language + ' language-' + language + '"' : '') + '>' + codeblock + end + '</code></pre>';
codeblock = showdown.subParser('hashBlock')(codeblock, options, globals);
// Since GHCodeblocks can be false positives, we need to
// store the primitive text and the parsed text in a global var,
// and then return a token
return '\n\n~G' + (globals.ghCodeBlocks.push({ text: wholeMatch, codeblock: codeblock }) - 1) + 'G\n\n';
});
// attacklab: strip sentinel
text = text.replace(/~0/, '');
return globals.converter._dispatch('githubCodeBlocks.after', text, options, globals);
});
showdown.subParser('hashBlock', function(text, options, globals) {
'use strict';
text = text.replace(/(^\n+|\n+$)/g, '');
return '\n\n~K' + (globals.gHtmlBlocks.push(text) - 1) + 'K\n\n';
});
showdown.subParser('hashElement', function(text, options, globals) {
'use strict';
return function(wholeMatch, m1) {
var blockText = m1;
// Undo double lines
blockText = blockText.replace(/\n\n/g, '\n');
blockText = blockText.replace(/^\n/, '');
// strip trailing blank lines
blockText = blockText.replace(/\n+$/g, '');
// Replace the element text with a marker ("~KxK" where x is its key)
blockText = '\n\n~K' + (globals.gHtmlBlocks.push(blockText) - 1) + 'K\n\n';
return blockText;
};
});
showdown.subParser('hashHTMLBlocks', function(text, options, globals) {
'use strict';
var blockTags = [
'pre',
'div',
'h1',
'h2',
'h3',
'h4',
'h5',
'h6',
'blockquote',
'table',
'dl',
'ol',
'ul',
'script',
'noscript',
'form',
'fieldset',
'iframe',
'math',
'style',
'section',
'header',
'footer',
'nav',
'article',
'aside',
'address',
'audio',
'canvas',
'figure',
'hgroup',
'output',
'video',
'p'
],
repFunc = function(wholeMatch, match, left, right) {
var txt = wholeMatch;
// check if this html element is marked as markdown
// if so, it's contents should be parsed as markdown
if (left.search(/\bmarkdown\b/) !== -1) {
txt = left + globals.converter.makeHtml(match) + right;
}
return '\n\n~K' + (globals.gHtmlBlocks.push(txt) - 1) + 'K\n\n';
};
for (var i = 0; i < blockTags.length; ++i) {
text = showdown.helper.replaceRecursiveRegExp(text, repFunc, '^(?: |\\t){0,3}<' + blockTags[i] + '\\b[^>]*>', '</' + blockTags[i] + '>', 'gim');
}
// HR SPECIAL CASE
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(/(<!--[\s\S]*?-->)/g,
showdown.subParser('hashElement')(text, options, globals));
// PHP and ASP-style processor instructions (<?...?> and <%...%>)
text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,
showdown.subParser('hashElement')(text, options, globals));
return text;
});
/**
* Hash span elements that should not be parsed as markdown
*/
showdown.subParser('hashHTMLSpans', function(text, config, globals) {
'use strict';
var matches = showdown.helper.matchRecursiveRegExp(text, '<code\\b[^>]*>', '</code>', 'gi');
for (var i = 0; i < matches.length; ++i) {
text = text.replace(matches[i][0], '~L' + (globals.gHtmlSpans.push(matches[i][0]) - 1) + 'L');
}
return text;
});
/**
* Unhash HTML spans
*/
showdown.subParser('unhashHTMLSpans', function(text, config, globals) {
'use strict';
for (var i = 0; i < globals.gHtmlSpans.length; ++i) {
text = text.replace('~L' + i + 'L', globals.gHtmlSpans[i]);
}
return text;
});
/**
* Hash span elements that should not be parsed as markdown
*/
showdown.subParser('hashPreCodeTags', function(text, config, globals) {
'use strict';
var repFunc = function(wholeMatch, match, left, right) {
// encode html entities
var codeblock = left + showdown.subParser('encodeCode')(match) + right;
return '\n\n~G' + (globals.ghCodeBlocks.push({ text: wholeMatch, codeblock: codeblock }) - 1) + 'G\n\n';
};
text = showdown.helper.replaceRecursiveRegExp(text, repFunc, '^(?: |\\t){0,3}<pre\\b[^>]*>\\s*<code\\b[^>]*>', '^(?: |\\t){0,3}</code>\\s*</pre>', 'gim');
return text;
});
showdown.subParser('headers', function(text, options, globals) {
'use strict';
text = globals.converter._dispatch('headers.before', text, options, globals);
var prefixHeader = options.prefixHeaderId,
headerLevelStart = (isNaN(parseInt(options.headerLevelStart))) ? 1 : parseInt(options.headerLevelStart),
// Set text-style headers:
// Header 1
// ========
//
// Header 2
// --------
//
setextRegexH1 = (options.smoothLivePreview) ? /^(.+)[ \t]*\n={2,}[ \t]*\n+/gm : /^(.+)[ \t]*\n=+[ \t]*\n+/gm,
setextRegexH2 = (options.smoothLivePreview) ? /^(.+)[ \t]*\n-{2,}[ \t]*\n+/gm : /^(.+)[ \t]*\n-+[ \t]*\n+/gm;
text = text.replace(setextRegexH1, function(wholeMatch, m1) {
var spanGamut = showdown.subParser('spanGamut')(m1, options, globals),
hID = (options.noHeaderId) ? '' : ' id="' + headerId(m1) + '"',
hLevel = headerLevelStart,
hashBlock = '<h' + hLevel + hID + '>' + spanGamut + '</h' + hLevel + '>';
return showdown.subParser('hashBlock')(hashBlock, options, globals);
});
text = text.replace(setextRegexH2, function(matchFound, m1) {
var spanGamut = showdown.subParser('spanGamut')(m1, options, globals),
hID = (options.noHeaderId) ? '' : ' id="' + headerId(m1) + '"',
hLevel = headerLevelStart + 1,
hashBlock = '<h' + hLevel + hID + '>' + spanGamut + '</h' + hLevel + '>';
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})[ \t]*(.+?)[ \t]*#*\n+/gm, function(wholeMatch, m1, m2) {
var span = showdown.subParser('spanGamut')(m2, options, globals),
hID = (options.noHeaderId) ? '' : ' id="' + headerId(m2) + '"',
hLevel = headerLevelStart - 1 + m1.length,
header = '<h' + hLevel + hID + '>' + span + '</h' + hLevel + '>';
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;
}
return title;
}
text = globals.converter._dispatch('headers.after', text, options, globals);
return text;
});
/**
* Turn Markdown image shortcuts into <img> tags.
*/
showdown.subParser('images', function(text, options, globals) {
'use strict';
text = globals.converter._dispatch('images.before', text, options, globals);
var inlineRegExp = /!\[(.*?)]\s?\([ \t]*()<?(\S+?)>?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*(?:(['"])(.*?)\6[ \t]*)?\)/g,
referenceRegExp = /!\[([^\]]*?)] ?(?:\n *)?\[(.*?)]()()()()()/g;
function writeImageTag(wholeMatch, altText, linkId, url, width, height, m5, title) {
var gUrls = globals.gUrls,
gTitles = globals.gTitles,
gDims = globals.gDimensions;
linkId = linkId.toLowerCase();
if (!title) {
title = '';
}
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 (!showdown.helper.isUndefined(gUrls[linkId])) {
url = gUrls[linkId];
if (!showdown.helper.isUndefined(gTitles[linkId])) {
title = gTitles[linkId];
}
if (!showdown.helper.isUndefined(gDims[linkId])) {
width = gDims[linkId].width;
height = gDims[linkId].height;
}
} else {
return wholeMatch;
}
}
altText = altText.replace(/"/g, '"');
altText = showdown.helper.escapeCharacters(altText, '*_', false);
url = showdown.helper.escapeCharacters(url, '*_', false);
var result = '<img src="' + url + '" alt="' + altText + '"';
if (title) {
title = title.replace(/"/g, '"');
title = showdown.helper.escapeCharacters(title, '*_', false);
result += ' title="' + title + '"';
}
if (width && height) {
width = (width === '*') ? 'auto' : width;
height = (height === '*') ? 'auto' : height;
result += ' width="' + width + '"';
result += ' height="' + height + '"';
}
result += ' />';
return result;
}
// First, handle reference-style labeled images: ![alt text][id]
text = text.replace(referenceRegExp, writeImageTag);
// Next, handle inline images: 
text = text.replace(inlineRegExp, writeImageTag);
text = globals.converter._dispatch('images.after', text, options, globals);
return text;
});
showdown.subParser('italicsAndBold', function(text, options, globals) {
'use strict';
text = globals.converter._dispatch('italicsAndBold.before', text, options, globals);
if (options.literalMidWordUnderscores) {
//underscores
// Since we are consuming a \s character, we need to add it
text = text.replace(/(^|\s|>|\b)__(?=\S)([\s\S]+?)__(?=\b|<|\s|$)/gm, '$1<strong>$2</strong>');
text = text.replace(/(^|\s|>|\b)_(?=\S)([\s\S]+?)_(?=\b|<|\s|$)/gm, '$1<em>$2</em>');
//asterisks
text = text.replace(/(\*\*)(?=\S)([^\r]*?\S[*]*)\1/g, '<strong>$2</strong>');
text = text.replace(/(\*)(?=\S)([^\r]*?\S)\1/g, '<em>$2</em>');
} else {
// <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>');
}
text = globals.converter._dispatch('italicsAndBold.after', text, options, globals);
return text;
});
/**
* Form HTML ordered (numbered) and unordered (bulleted) lists.
*/
showdown.subParser('lists', function(text, options, globals) {
'use strict';
text = globals.converter._dispatch('lists.before', text, options, globals);
/**
* Process the contents of a single ordered or unordered list, splitting it
* into individual list items.
* @param {string} listStr
* @param {boolean} trimTrailing
* @returns {string}
*/
function processListItems(listStr, trimTrailing) {
// The $g_list_level global keeps track of when we're inside a list.
// Each time we enter a list, we increment it; when we leave a list,
// we decrement. If it's zero, we're not in a list anymore.
//
// We do this because when we're not inside a list, we want to treat
// something like this:
//
// I recommend upgrading to version
// 8. Oops, now this line is treated
// as a sub-list.
//
// As a single paragraph, despite the fact that the second line starts
// with a digit-period-space sequence.
//
// Whereas when we're inside a list (or sub-list), that line will be
// treated as the start of a sub-list. What a kludge, huh? This is
// an aspect of Markdown's syntax that's hard to parse perfectly
// without resorting to mind-reading. Perhaps the solution is to
// change the syntax rules such that sub-lists must start with a
// starting cardinal number; e.g. "1." or "a.".
globals.gListLevel++;
// trim trailing blank lines:
listStr = listStr.replace(/\n{2,}$/, '\n');
// attacklab: add sentinel to emulate \z
listStr += '~0';
var rgx = /(\n)?(^[ \t]*)([*+-]|\d+[.])[ \t]+((\[(x|X| )?])?[ \t]*[^\r]+?(\n{1,2}))(?=\n*(~0|\2([*+-]|\d+[.])[ \t]+))/gm,
isParagraphed = (/\n[ \t]*\n(?!~0)/.test(listStr));
listStr = listStr.replace(rgx, function(wholeMatch, m1, m2, m3, m4, taskbtn, checked) {
checked = (checked && checked.trim() !== '');
var item = showdown.subParser('outdent')(m4, options, globals),
bulletStyle = '';
// Support for github tasklists
if (taskbtn && options.tasklists) {
bulletStyle = ' class="task-list-item" style="list-style-type: none;"';
item = item.replace(/^[ \t]*\[(x|X| )?]/m, function() {
var otp = '<input type="checkbox" disabled style="margin: 0px 0.35em 0.25em -1.6em; vertical-align: middle;"';
if (checked) {
otp += ' checked';
}
otp += '>';
return otp;
});
}
// m1 - Leading line or
// Has a double return (multi paragraph) or
// Has sublist
if (m1 || (item.search(/\n{2,}/) > -1)) {
item = showdown.subParser('githubCodeBlocks')(item, options, globals);
item = showdown.subParser('blockGamut')(item, options, globals);
} else {
// Recursion for sub-lists:
item = showdown.subParser('lists')(item, options, globals);
item = item.replace(/\n$/, ''); // chomp(item)
if (isParagraphed) {
item = showdown.subParser('paragraphs')(item, options, globals);
} else {
item = showdown.subParser('spanGamut')(item, options, globals);
}
}
item = '\n<li' + bulletStyle + '>' + item + '</li>\n';
return item;
});
// attacklab: strip sentinel
listStr = listStr.replace(/~0/g, '');
globals.gListLevel--;
if (trimTrailing) {
listStr = listStr.replace(/\s+$/, '');
}
return listStr;
}
/**
* Check and parse consecutive lists (better fix for issue #142)
* @param {string} list
* @param {string} listType
* @param {boolean} trimTrailing
* @returns {string}
*/
function parseConsecutiveLists(list, listType, trimTrailing) {
// check if we caught 2 or more consecutive lists by mistake
// we use the counterRgx, meaning if listType is UL we look for UL and vice versa
var counterRxg = (listType === 'ul') ? /^ {0,2}\d+\.[ \t]/gm : /^ {0,2}[*+-][ \t]/gm,
subLists = [],
result = '';
if (list.search(counterRxg) !== -1) {
(function parseCL(txt) {
var pos = txt.search(counterRxg);
if (pos !== -1) {
// slice
result += '\n\n<' + listType + '>' + processListItems(txt.slice(0, pos), !!trimTrailing) + '</' + listType + '>\n\n';
// invert counterType and listType
listType = (listType === 'ul') ? 'ol' : 'ul';
counterRxg = (listType === 'ul') ? /^ {0,2}\d+\.[ \t]/gm : /^ {0,2}[*+-][ \t]/gm;
//recurse
parseCL(txt.slice(pos));
} else {
result += '\n\n<' + listType + '>' + processListItems(txt, !!trimTrailing) + '</' + listType + '>\n\n';
}
})(list);
for (var i = 0; i < subLists.length; ++i) {
}
} else {
result = '\n\n<' + listType + '>' + processListItems(list, !!trimTrailing) + '</' + listType + '>\n\n';
}
return result;
}
// 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 entire ul or ol list:
var wholeList = /^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;
if (globals.gListLevel) {
text = text.replace(wholeList, function(wholeMatch, list, m2) {
var listType = (m2.search(/[*+-]/g) > -1) ? 'ul' : 'ol';
return parseConsecutiveLists(list, listType, true);
});
} else {
wholeList = /(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;
//wholeList = /(\n\n|^\n?)( {0,3}([*+-]|\d+\.)[ \t]+[\s\S]+?)(?=(~0)|(\n\n(?!\t| {2,}| {0,3}([*+-]|\d+\.)[ \t])))/g;
text = text.replace(wholeList, function(wholeMatch, m1, list, m3) {
var listType = (m3.search(/[*+-]/g) > -1) ? 'ul' : 'ol';
return parseConsecutiveLists(list, listType);
});
}
// attacklab: strip sentinel
text = text.replace(/~0/, '');
text = globals.converter._dispatch('lists.after', text, options, globals);
return text;
});
/**
* Remove one level of line-leading tabs or spaces
*/
showdown.subParser('outdent', function(text) {
'use strict';
// 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;
});
/**
*
*/
showdown.subParser('paragraphs', function(text, options, globals) {
'use strict';
text = globals.converter._dispatch('paragraphs.before', text, options, globals);
// 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|G)(\d+)\1/g) >= 0) {
grafsOut.push(str);
} else {
str = showdown.subParser('spanGamut')(str, options, globals);
str = str.replace(/^([ \t]*)/g, '<p>');
str += '</p>';
grafsOut.push(str);
}
}
/** Unhashify HTML blocks */
end = grafsOut.length;
for (i = 0; i < end; i++) {
var blockText = '',
grafsOutIt = grafsOut[i],
codeFlag = false;
// if this is a marker for an html block...
while (grafsOutIt.search(/~(K|G)(\d+)\1/) >= 0) {
var delim = RegExp.$1,
num = RegExp.$2;
if (delim === 'K') {
blockText = globals.gHtmlBlocks[num];
} else {
// we need to check if ghBlock is a false positive
if (codeFlag) {
// use encoded version of all text
blockText = showdown.subParser('encodeCode')(globals.ghCodeBlocks[num].text);
} else {
blockText = globals.ghCodeBlocks[num].codeblock;
}
}
blockText = blockText.replace(/\$/g, '$$$$'); // Escape any dollar signs
grafsOutIt = grafsOutIt.replace(/(\n\n)?~(K|G)\d+\2(\n\n)?/, blockText);
// Check if grafsOutIt is a pre->code
if (/^<pre\b[^>]*>\s*<code\b[^>]*>/.test(grafsOutIt)) {
codeFlag = true;
}
}
grafsOut[i] = grafsOutIt;
}
text = grafsOut.join('\n\n');
// Strip leading and trailing lines:
text = text.replace(/^\n+/g, '');
text = text.replace(/\n+$/g, '');
return globals.converter._dispatch('paragraphs.after', text, options, globals);
});
/**
* Run extension
*/
showdown.subParser('runExtension', function(ext, text, options, globals) {
'use strict';
if (ext.filter) {
text = ext.filter(text, globals.converter, options);
} else if (ext.regex) {
// TODO remove this when old extension loading mechanism is deprecated
var re = ext.regex;
if (!re instanceof RegExp) {
re = new RegExp(re, 'g');
}
text = text.replace(re, ext.replace);
}
return text;
});
/**
* 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';
text = globals.converter._dispatch('spanGamut.before', text, options, globals);
text = showdown.subParser('codeSpans')(text, options, globals);
text = showdown.subParser('escapeSpecialCharsWithinTagAttributes')(text, options, globals);
text = showdown.subParser('encodeBackslashEscapes')(text, options, globals);
// 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);
// 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);
text = showdown.subParser('strikethrough')(text, options, globals);
// Do hard breaks:
text = text.replace(/ +\n/g, ' <br />\n');
text = globals.converter._dispatch('spanGamut.after', text, options, globals);
return text;
});
showdown.subParser('strikethrough', function(text, options, globals) {
'use strict';
if (options.strikethrough) {
text = globals.converter._dispatch('strikethrough.before', text, options, globals);
text = text.replace(/(?:~T){2}([\s\S]+?)(?:~T){2}/g, '<del>$1</del>');
text = globals.converter._dispatch('strikethrough.after', text, options, globals);
}
return text;
});
/**
* Strip any lines consisting only of spaces and tabs.
* This makes subsequent regexs easier to write, because we can
* match consecutive blank lines with /\n+/ instead of something
* contorted like /[ \t]*\n+/
*/
showdown.subParser('stripBlankLines', function(text) {
'use strict';
return text.replace(/^[ \t]+$/mg, '');
});
/**
* 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';
var regex = /^ {0,3}\[(.+)]:[ \t]*\n?[ \t]*<?(\S+?)>?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*\n?[ \t]*(?:(\n*)["|'(](.+?)["|')][ \t]*)?(?:\n+|(?=~0))/gm;
// attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
text += '~0';
text = text.replace(regex, function(wholeMatch, linkId, url, width, height, blankLines, title) {
linkId = linkId.toLowerCase();
globals.gUrls[linkId] = showdown.subParser('encodeAmpsAndAngles')(url); // Link IDs are case-insensitive
if (blankLines) {
// Oops, found blank lines, so it's not a title.
// Put back the parenthetical statement we stole.
return blankLines + title;
} else {
if (title) {
globals.gTitles[linkId] = title.replace(/"|'/g, '"');
}
if (options.parseImgDimensions && width && height) {
globals.gDimensions[linkId] = {
width: width,
height: height
};
}
}
// Completely remove the definition from the text
return '';
});
// attacklab: strip sentinel
text = text.replace(/~0/, '');
return text;
});
showdown.subParser('tables', function(text, options, globals) {
'use strict';
if (!options.tables) {
return text;
}
var tableRgx = /^[ \t]{0,3}\|?.+\|.+\n[ \t]{0,3}\|?[ \t]*:?[ \t]*(?:-|=){2,}[ \t]*:?[ \t]*\|[ \t]*:?[ \t]*(?:-|=){2,}[\s\S]+?(?:\n\n|~0)/gm;
function parseStyles(sLine) {
if (/^:[ \t]*--*$/.test(sLine)) {
return ' style="text-align:left;"';
} else if (/^--*[ \t]*:[ \t]*$/.test(sLine)) {
return ' style="text-align:right;"';
} else if (/^:[ \t]*--*[ \t]*:$/.test(sLine)) {
return ' style="text-align:center;"';
} else {
return '';
}
}
function parseHeaders(header, style) {
var id = '';
header = header.trim();
if (options.tableHeaderId) {
id = ' id="' + header.replace(/ /g, '_').toLowerCase() + '"';
}
header = showdown.subParser('spanGamut')(header, options, globals);
return '<th' + id + style + '>' + header + '</th>\n';
}
function parseCells(cell, style) {
var subText = showdown.subParser('spanGamut')(cell, options, globals);
return '<td' + style + '>' + subText + '</td>\n';
}
function buildTable(headers, cells) {
var tb = '<table>\n<thead>\n<tr>\n',
tblLgn = headers.length;
for (var i = 0; i < tblLgn; ++i) {
tb += headers[i];
}
tb += '</tr>\n</thead>\n<tbody>\n';
for (i = 0; i < cells.length; ++i) {
tb += '<tr>\n';
for (var ii = 0; ii < tblLgn; ++ii) {
tb += cells[i][ii];
}
tb += '</tr>\n';
}
tb += '</tbody>\n</table>\n';
return tb;
}
text = globals.converter._dispatch('tables.before', text, options, globals);
text = text.replace(tableRgx, function(rawTable) {
var i, tableLines = rawTable.split('\n');
// strip wrong first and last column if wrapped tables are used
for (i = 0; i < tableLines.length; ++i) {
if (/^[ \t]{0,3}\|/.test(tableLines[i])) {
tableLines[i] = tableLines[i].replace(/^[ \t]{0,3}\|/, '');
}
if (/\|[ \t]*$/.test(tableLines[i])) {
tableLines[i] = tableLines[i].replace(/\|[ \t]*$/, '');
}
}
var rawHeaders = tableLines[0].split('|').map(function(s) { return s.trim(); }),
rawStyles = tableLines[1].split('|').map(function(s) { return s.trim(); }),
rawCells = [],
headers = [],
styles = [],
cells = [];
tableLines.shift();
tableLines.shift();
for (i = 0; i < tableLines.length; ++i) {
if (tableLines[i].trim() === '') {
continue;
}
rawCells.push(
tableLines[i]
.split('|')
.map(function(s) {
return s.trim();
})
);
}
if (rawHeaders.length < rawStyles.length) {
return rawTable;
}
for (i = 0; i < rawStyles.length; ++i) {
styles.push(parseStyles(rawStyles[i]));
}
for (i = 0; i < rawHeaders.length; ++i) {
if (showdown.helper.isUndefined(styles[i])) {
styles[i] = '';
}
headers.push(parseHeaders(rawHeaders[i], styles[i]));
}
for (i = 0; i < rawCells.length; ++i) {
var row = [];
for (var ii = 0; ii < headers.length; ++ii) {
if (showdown.helper.isUndefined(rawCells[i][ii])) {
}
row.push(parseCells(rawCells[i][ii], styles[ii]));
}
cells.push(row);
}
return buildTable(headers, cells);
});
text = globals.converter._dispatch('tables.after', text, options, globals);
return text;
});
/**
* Swap back in all the special characters we've hidden.
*/
showdown.subParser('unescapeSpecialChars', function(text) {
'use strict';
text = text.replace(/~E(\d+)E/g, function(wholeMatch, m1) {
var charCodeToReplace = parseInt(m1);
return String.fromCharCode(charCodeToReplace);
});
return text;
});
module.exports = showdown;