/** * 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 * 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. "<" and ">" both produce ["x"] when using * "<" and ">" as the delimiters (both strings contain a single, * balanced instance of ""). * * examples: * matchRecursiveRegExp("test", "\\(", "\\)") * returns: [] * matchRecursiveRegExp(">>t<>", "<", ">", "g") * returns: ["t<>", ""] * matchRecursiveRegExp("
test
", "]*>", "", "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 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 = ''; 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: 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 '' + lnkTxt + ''; } 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')('
', 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 //

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

 content, so we need to fix that:
    bq = bq.replace(/(\s*
[^\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')('
\n' + bq + '\n
', options, globals); }); text = globals.converter._dispatch('blockQuotes.after', text, options, globals); return text; }); /** * Process Markdown `
` 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 = '
' + codeblock + end + '
'; 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 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: * *

Just type foo `bar` baz at the prompt.

* * 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 `bar` ... */ 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 + '' + c + ''; } ); 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, '>'); // 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.: * * foo * @example.com * * Based on a filter by Matthew Wickline, posted to the BBEdit-Talk * mailing list: * */ 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 = '' + addr + ''; 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\/!$]("[^"]*"|'[^']*'|[^'">])*>|)/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 = '
' + codeblock + end + '
'; 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[^>]*>', '', '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(/()/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, ']*>', '', '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}]*>\\s*]*>', '^(?: |\\t){0,3}\\s*
', '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 = '' + spanGamut + ''; 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 = '' + spanGamut + ''; 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 = '' + span + ''; 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 tags. */ showdown.subParser('images', function (text, options, globals) { 'use strict'; text = globals.converter._dispatch('images.before', text, options, globals); var inlineRegExp = /!\[(.*?)]\s?\([ \t]*()?(?: =([*\d]+[A-Za-z%]{0,4})x([*\d]+[A-Za-z%]{0,4}))?[ \t]*(?:(['"])(.*?)\6[ \t]*)?\)/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 = '' + altText + 'x "optional title") 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$2'); text = text.replace(/(^|\s|>|\b)_(?=\S)([\s\S]+?)_(?=\b|<|\s|$)/gm, '$1$2'); //asterisks text = text.replace(/(\*\*)(?=\S)([^\r]*?\S[*]*)\1/g, '$2'); text = text.replace(/(\*)(?=\S)([^\r]*?\S)\1/g, '$2'); } else { // must go first: text = text.replace(/(\*\*|__)(?=\S)([^\r]*?\S[*_]*)\1/g, '$2'); text = text.replace(/(\*|_)(?=\S)([^\r]*?\S)\1/g, '$2'); } 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 = ' -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$/, ''); // chomp(item) if (isParagraphed) { item = showdown.subParser('paragraphs')(item, options, globals); } else { item = showdown.subParser('spanGamut')(item, options, globals); } } item = '\n' + item + '\n'; return item; }); // attacklab: strip sentinel listStr = listStr.replace(/~0/g, ''); globals.gListLevel--; if (trimTrailing) { listStr = listStr.replace(/\s+$/, ''); } 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) + '\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) + '\n\n'; } })(list); for (var i = 0; i < subLists.length; ++i) { } } else { result = '\n\n<' + listType + '>' + processListItems(list, !!trimTrailing) + '\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

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, '

'); str += '

'; 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 (/^]*>\s*]*>/.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 `` // Must come after _DoAnchors(), because you can use < and > // delimiters in inline links like [this](). 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, '
\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, '$1'); text = globals.converter._dispatch('strikethrough.after', text, options, globals); } return text; }); /** * Strip any lines consisting only of spaces and tabs. * This makes subsequent regexs easier to write, because we can * match consecutive blank lines with /\n+/ instead of something * contorted like /[ \t]*\n+/ */ showdown.subParser('stripBlankLines', function (text) { 'use strict'; return text.replace(/^[ \t]+$/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]* * ? // 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]*?(?: =([*\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]*:$/.test(sLine)) { return ' style="text-align:center;"'; } else { return ''; } } function parseHeaders(header, style) { var id = ''; header = header.trim(); if (options.tableHeaderId) { id = ' id="' + header.replace(/ /g, '_').toLowerCase() + '"'; } header = showdown.subParser('spanGamut')(header, options, globals); return '' + header + '\n'; } function parseCells(cell, style) { var subText = showdown.subParser('spanGamut')(cell, options, globals); return '' + subText + '\n'; } function buildTable(headers, cells) { var tb = '\n\n\n', tblLgn = headers.length; for (var i = 0; i < tblLgn; ++i) { tb += headers[i]; } tb += '\n\n\n'; for (i = 0; i < cells.length; ++i) { tb += '\n'; for (var ii = 0; ii < tblLgn; ++ii) { tb += cells[i][ii]; } tb += '\n'; } tb += '\n
\n'; return tb; } text = globals.converter._dispatch('tables.before', text, options, globals); text = text.replace(tableRgx, function (rawTable) { var i, tableLines = rawTable.split('\n'); // strip wrong first and last column if wrapped tables are used for (i = 0; i < tableLines.length; ++i) { if (/^[ \t]{0,3}\|/.test(tableLines[i])) { tableLines[i] = tableLines[i].replace(/^[ \t]{0,3}\|/, ''); } if (/\|[ \t]*$/.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;