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Posted to commits@kafka.apache.org by gu...@apache.org on 2017/06/01 23:24:25 UTC
[2/3] kafka-site git commit: Add auto syntax highlighter
http://git-wip-us.apache.org/repos/asf/kafka-site/blob/c48d9d36/js/syntaxhighlighter.js
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diff --git a/js/syntaxhighlighter.js b/js/syntaxhighlighter.js
new file mode 100644
index 0000000..38769dd
--- /dev/null
+++ b/js/syntaxhighlighter.js
@@ -0,0 +1,5394 @@
+/*!
+ * SyntaxHighlighter
+ * https://github.com/syntaxhighlighter/syntaxhighlighter
+ *
+ * SyntaxHighlighter is donationware. If you are using it, please donate.
+ * http://alexgorbatchev.com/SyntaxHighlighter/donate.html
+ *
+ * @version
+ * 4.0.1 (Wed, 31 May 2017 00:06:41 GMT)
+ *
+ * @copyright
+ * Copyright (C) 2004-2016 Alex Gorbatchev.
+ *
+ * @license
+ * Dual licensed under the MIT and GPL licenses.
+ */
+/******/ (function(modules) { // webpackBootstrap
+/******/ // The module cache
+/******/ var installedModules = {};
+/******/
+/******/ // The require function
+/******/ function __webpack_require__(moduleId) {
+/******/
+/******/ // Check if module is in cache
+/******/ if(installedModules[moduleId])
+/******/ return installedModules[moduleId].exports;
+/******/
+/******/ // Create a new module (and put it into the cache)
+/******/ var module = installedModules[moduleId] = {
+/******/ exports: {},
+/******/ id: moduleId,
+/******/ loaded: false
+/******/ };
+/******/
+/******/ // Execute the module function
+/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
+/******/
+/******/ // Flag the module as loaded
+/******/ module.loaded = true;
+/******/
+/******/ // Return the exports of the module
+/******/ return module.exports;
+/******/ }
+/******/
+/******/
+/******/ // expose the modules object (__webpack_modules__)
+/******/ __webpack_require__.m = modules;
+/******/
+/******/ // expose the module cache
+/******/ __webpack_require__.c = installedModules;
+/******/
+/******/ // __webpack_public_path__
+/******/ __webpack_require__.p = "";
+/******/
+/******/ // Load entry module and return exports
+/******/ return __webpack_require__(0);
+/******/ })
+/************************************************************************/
+/******/ ([
+/* 0 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ 'use strict';
+
+ Object.defineProperty(exports, "__esModule", {
+ value: true
+ });
+
+ var _core = __webpack_require__(1);
+
+ Object.keys(_core).forEach(function (key) {
+ if (key === "default" || key === "__esModule") return;
+ Object.defineProperty(exports, key, {
+ enumerable: true,
+ get: function get() {
+ return _core[key];
+ }
+ });
+ });
+
+ var _domready = __webpack_require__(52);
+
+ var _domready2 = _interopRequireDefault(_domready);
+
+ var _core2 = _interopRequireDefault(_core);
+
+ var _dasherize = __webpack_require__(53);
+
+ var dasherize = _interopRequireWildcard(_dasherize);
+
+ function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+ // configured through the `--compat` parameter.
+ if (false) {
+ require('./compatibility_layer_v3');
+ }
+
+ (0, _domready2.default)(function () {
+ return _core2.default.highlight(dasherize.object(window.syntaxhighlighterConfig || {}));
+ });
+
+/***/ }),
+/* 1 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ 'use strict';
+
+ Object.defineProperty(exports, "__esModule", {
+ value: true
+ });
+ var optsParser = __webpack_require__(2),
+ match = __webpack_require__(5),
+ Renderer = __webpack_require__(9).default,
+ utils = __webpack_require__(10),
+ transformers = __webpack_require__(11),
+ dom = __webpack_require__(17),
+ config = __webpack_require__(18),
+ defaults = __webpack_require__(19),
+ HtmlScript = __webpack_require__(20);
+
+ var sh = {
+ Match: match.Match,
+ Highlighter: __webpack_require__(22),
+
+ config: __webpack_require__(18),
+ regexLib: __webpack_require__(3).commonRegExp,
+
+ /** Internal 'global' variables. */
+ vars: {
+ discoveredBrushes: null,
+ highlighters: {}
+ },
+
+ /** This object is populated by user included external brush files. */
+ brushes: {},
+
+ /**
+ * Finds all elements on the page which should be processes by SyntaxHighlighter.
+ *
+ * @param {Object} globalParams Optional parameters which override element's
+ * parameters. Only used if element is specified.
+ *
+ * @param {Object} element Optional element to highlight. If none is
+ * provided, all elements in the current document
+ * are returned which qualify.
+ *
+ * @return {Array} Returns list of <code>{ target: DOMElement, params: Object }</code> objects.
+ */
+ findElements: function findElements(globalParams, element) {
+ var elements = element ? [element] : utils.toArray(document.getElementsByTagName(sh.config.tagName)),
+ conf = sh.config,
+ result = [];
+
+ // support for <SCRIPT TYPE="syntaxhighlighter" /> feature
+ elements = elements.concat(dom.getSyntaxHighlighterScriptTags());
+
+ if (elements.length === 0) return result;
+
+ for (var i = 0, l = elements.length; i < l; i++) {
+ var item = {
+ target: elements[i],
+ // local params take precedence over globals
+ params: optsParser.defaults(optsParser.parse(elements[i].className), globalParams)
+ };
+
+ if (item.params['brush'] == null) continue;
+
+ result.push(item);
+ }
+
+ return result;
+ },
+
+ /**
+ * Shorthand to highlight all elements on the page that are marked as
+ * SyntaxHighlighter source code.
+ *
+ * @param {Object} globalParams Optional parameters which override element's
+ * parameters. Only used if element is specified.
+ *
+ * @param {Object} element Optional element to highlight. If none is
+ * provided, all elements in the current document
+ * are highlighted.
+ */
+ highlight: function highlight(globalParams, element) {
+ var elements = sh.findElements(globalParams, element),
+ propertyName = 'innerHTML',
+ brush = null,
+ renderer,
+ conf = sh.config;
+
+ if (elements.length === 0) return;
+
+ for (var i = 0, l = elements.length; i < l; i++) {
+ var element = elements[i],
+ target = element.target,
+ params = element.params,
+ brushName = params.brush,
+ brush,
+ matches,
+ code;
+
+ if (brushName == null) continue;
+
+ brush = findBrush(brushName);
+
+ if (!brush) continue;
+
+ // local params take precedence over defaults
+ params = optsParser.defaults(params || {}, defaults);
+ params = optsParser.defaults(params, config);
+
+ // Instantiate a brush
+ if (params['html-script'] == true || defaults['html-script'] == true) {
+ brush = new HtmlScript(findBrush('xml'), brush);
+ brushName = 'htmlscript';
+ } else {
+ brush = new brush();
+ }
+
+ code = target[propertyName];
+
+ // remove CDATA from <SCRIPT/> tags if it's present
+ if (conf.useScriptTags) code = stripCData(code);
+
+ // Inject title if the attribute is present
+ if ((target.title || '') != '') params.title = target.title;
+
+ params['brush'] = brushName;
+
+ code = transformers(code, params);
+ matches = match.applyRegexList(code, brush.regexList, params);
+ renderer = new Renderer(code, matches, params);
+
+ element = dom.create('div');
+ element.innerHTML = renderer.getHtml();
+
+ // id = utils.guid();
+ // element.id = highlighters.id(id);
+ // highlighters.set(id, element);
+
+ if (params.quickCode) dom.attachEvent(dom.findElement(element, '.code'), 'dblclick', dom.quickCodeHandler);
+
+ // carry over ID
+ if ((target.id || '') != '') element.id = target.id;
+
+ target.parentNode.replaceChild(element, target);
+ }
+ }
+ }; // end of sh
+
+ /**
+ * Displays an alert.
+ * @param {String} str String to display.
+ */
+ function alert(str) {
+ window.alert('SyntaxHighlighter\n\n' + str);
+ };
+
+ /**
+ * Finds a brush by its alias.
+ *
+ * @param {String} alias Brush alias.
+ * @param {Boolean} showAlert Suppresses the alert if false.
+ * @return {Brush} Returns bursh constructor if found, null otherwise.
+ */
+ function findBrush(alias, showAlert) {
+ var brushes = sh.vars.discoveredBrushes,
+ result = null;
+
+ if (brushes == null) {
+ brushes = {};
+
+ // Find all brushes
+ for (var brushName in sh.brushes) {
+ var brush = sh.brushes[brushName],
+ aliases = brush.aliases;
+
+ if (aliases == null) {
+ continue;
+ }
+
+ brush.className = brush.className || brush.aliases[0];
+ brush.brushName = brush.className || brushName.toLowerCase();
+
+ for (var i = 0, l = aliases.length; i < l; i++) {
+ brushes[aliases[i]] = brushName;
+ }
+ }
+
+ sh.vars.discoveredBrushes = brushes;
+ }
+
+ result = sh.brushes[brushes[alias]];
+
+ if (result == null && showAlert) alert(sh.config.strings.noBrush + alias);
+
+ return result;
+ };
+
+ /**
+ * Strips <![CDATA[]]> from <SCRIPT /> content because it should be used
+ * there in most cases for XHTML compliance.
+ * @param {String} original Input code.
+ * @return {String} Returns code without leading <![CDATA[]]> tags.
+ */
+ function stripCData(original) {
+ var left = '<![CDATA[',
+ right = ']]>',
+
+ // for some reason IE inserts some leading blanks here
+ copy = utils.trim(original),
+ changed = false,
+ leftLength = left.length,
+ rightLength = right.length;
+
+ if (copy.indexOf(left) == 0) {
+ copy = copy.substring(leftLength);
+ changed = true;
+ }
+
+ var copyLength = copy.length;
+
+ if (copy.indexOf(right) == copyLength - rightLength) {
+ copy = copy.substring(0, copyLength - rightLength);
+ changed = true;
+ }
+
+ return changed ? copy : original;
+ };
+
+ var brushCounter = 0;
+
+ exports.default = sh;
+ var registerBrush = exports.registerBrush = function registerBrush(brush) {
+ return sh.brushes['brush' + brushCounter++] = brush.default || brush;
+ };
+ var clearRegisteredBrushes = exports.clearRegisteredBrushes = function clearRegisteredBrushes() {
+ sh.brushes = {};
+ brushCounter = 0;
+ };
+
+ /* an EJS hook for `gulp build --brushes` command
+ * */
+
+ registerBrush(__webpack_require__(23));
+
+ registerBrush(__webpack_require__(24));
+
+ registerBrush(__webpack_require__(22));
+
+ registerBrush(__webpack_require__(25));
+
+ registerBrush(__webpack_require__(26));
+
+ registerBrush(__webpack_require__(27));
+
+ registerBrush(__webpack_require__(28));
+
+ registerBrush(__webpack_require__(29));
+
+ registerBrush(__webpack_require__(30));
+
+ registerBrush(__webpack_require__(31));
+
+ registerBrush(__webpack_require__(32));
+
+ registerBrush(__webpack_require__(33));
+
+ registerBrush(__webpack_require__(34));
+
+ registerBrush(__webpack_require__(35));
+
+ registerBrush(__webpack_require__(36));
+
+ registerBrush(__webpack_require__(37));
+
+ registerBrush(__webpack_require__(38));
+
+ registerBrush(__webpack_require__(39));
+
+ registerBrush(__webpack_require__(40));
+
+ registerBrush(__webpack_require__(41));
+
+ registerBrush(__webpack_require__(42));
+
+ registerBrush(__webpack_require__(43));
+
+ registerBrush(__webpack_require__(44));
+
+ registerBrush(__webpack_require__(45));
+
+ registerBrush(__webpack_require__(46));
+
+ registerBrush(__webpack_require__(47));
+
+ registerBrush(__webpack_require__(48));
+
+ registerBrush(__webpack_require__(49));
+
+ registerBrush(__webpack_require__(50));
+
+ registerBrush(__webpack_require__(51));
+
+ /*
+
+ */
+
+/***/ }),
+/* 2 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ 'use strict';
+
+ var XRegExp = __webpack_require__(3).XRegExp;
+
+ var BOOLEANS = { 'true': true, 'false': false };
+
+ function camelize(key) {
+ return key.replace(/-(\w+)/g, function (match, word) {
+ return word.charAt(0).toUpperCase() + word.substr(1);
+ });
+ }
+
+ function process(value) {
+ var result = BOOLEANS[value];
+ return result == null ? value : result;
+ }
+
+ module.exports = {
+ defaults: function defaults(target, source) {
+ for (var key in source || {}) {
+ if (!target.hasOwnProperty(key)) target[key] = target[camelize(key)] = source[key];
+ }return target;
+ },
+
+ parse: function parse(str) {
+ var match,
+ key,
+ result = {},
+ arrayRegex = XRegExp("^\\[(?<values>(.*?))\\]$"),
+ pos = 0,
+ regex = XRegExp("(?<name>[\\w-]+)" + "\\s*:\\s*" + "(?<value>" + "[\\w%#-]+|" + // word
+ "\\[.*?\\]|" + // [] array
+ '".*?"|' + // "" string
+ "'.*?'" + // '' string
+ ")\\s*;?", "g");
+
+ while ((match = XRegExp.exec(str, regex, pos)) != null) {
+ var value = match.value.replace(/^['"]|['"]$/g, '') // strip quotes from end of strings
+ ;
+
+ // try to parse array value
+ if (value != null && arrayRegex.test(value)) {
+ var m = XRegExp.exec(value, arrayRegex);
+ value = m.values.length > 0 ? m.values.split(/\s*,\s*/) : [];
+ }
+
+ value = process(value);
+ result[match.name] = result[camelize(match.name)] = value;
+ pos = match.index + match[0].length;
+ }
+
+ return result;
+ }
+ };
+
+/***/ }),
+/* 3 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ 'use strict';
+
+ Object.defineProperty(exports, "__esModule", {
+ value: true
+ });
+ exports.commonRegExp = exports.XRegExp = undefined;
+
+ var _xregexp = __webpack_require__(4);
+
+ var _xregexp2 = _interopRequireDefault(_xregexp);
+
+ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+ exports.XRegExp = _xregexp2.default;
+ var commonRegExp = exports.commonRegExp = {
+ multiLineCComments: (0, _xregexp2.default)('/\\*.*?\\*/', 'gs'),
+ singleLineCComments: /\/\/.*$/gm,
+ singleLinePerlComments: /#.*$/gm,
+ doubleQuotedString: /"([^\\"\n]|\\.)*"/g,
+ singleQuotedString: /'([^\\'\n]|\\.)*'/g,
+ multiLineDoubleQuotedString: (0, _xregexp2.default)('"([^\\\\"]|\\\\.)*"', 'gs'),
+ multiLineSingleQuotedString: (0, _xregexp2.default)("'([^\\\\']|\\\\.)*'", 'gs'),
+ xmlComments: (0, _xregexp2.default)('(<|<)!--.*?--(>|>)', 'gs'),
+ url: /\w+:\/\/[\w-.\/?%&=:@;#]*/g,
+ phpScriptTags: { left: /(<|<)\?(?:=|php)?/g, right: /\?(>|>)/g, 'eof': true },
+ aspScriptTags: { left: /(<|<)%=?/g, right: /%(>|>)/g },
+ scriptScriptTags: { left: /(<|<)\s*script.*?(>|>)/gi, right: /(<|<)\/\s*script\s*(>|>)/gi }
+ };
+
+/***/ }),
+/* 4 */
+/***/ (function(module, exports) {
+
+ /*!
+ * XRegExp 3.1.0-dev
+ * <xregexp.com>
+ * Steven Levithan (c) 2007-2015 MIT License
+ */
+
+ /**
+ * XRegExp provides augmented, extensible regular expressions. You get additional regex syntax and
+ * flags, beyond what browsers support natively. XRegExp is also a regex utility belt with tools to
+ * make your client-side grepping simpler and more powerful, while freeing you from related
+ * cross-browser inconsistencies.
+ */
+
+ 'use strict';
+
+ /* ==============================
+ * Private variables
+ * ============================== */
+
+ // Property name used for extended regex instance data
+
+ var REGEX_DATA = 'xregexp';
+ // Optional features that can be installed and uninstalled
+ var features = {
+ astral: false,
+ natives: false
+ };
+ // Native methods to use and restore ('native' is an ES3 reserved keyword)
+ var nativ = {
+ exec: RegExp.prototype.exec,
+ test: RegExp.prototype.test,
+ match: String.prototype.match,
+ replace: String.prototype.replace,
+ split: String.prototype.split
+ };
+ // Storage for fixed/extended native methods
+ var fixed = {};
+ // Storage for regexes cached by `XRegExp.cache`
+ var regexCache = {};
+ // Storage for pattern details cached by the `XRegExp` constructor
+ var patternCache = {};
+ // Storage for regex syntax tokens added internally or by `XRegExp.addToken`
+ var tokens = [];
+ // Token scopes
+ var defaultScope = 'default';
+ var classScope = 'class';
+ // Regexes that match native regex syntax, including octals
+ var nativeTokens = {
+ // Any native multicharacter token in default scope, or any single character
+ 'default': /\\(?:0(?:[0-3][0-7]{0,2}|[4-7][0-7]?)?|[1-9]\d*|x[\dA-Fa-f]{2}|u(?:[\dA-Fa-f]{4}|{[\dA-Fa-f]+})|c[A-Za-z]|[\s\S])|\(\?[:=!]|[?*+]\?|{\d+(?:,\d*)?}\??|[\s\S]/,
+ // Any native multicharacter token in character class scope, or any single character
+ 'class': /\\(?:[0-3][0-7]{0,2}|[4-7][0-7]?|x[\dA-Fa-f]{2}|u(?:[\dA-Fa-f]{4}|{[\dA-Fa-f]+})|c[A-Za-z]|[\s\S])|[\s\S]/
+ };
+ // Any backreference or dollar-prefixed character in replacement strings
+ var replacementToken = /\$(?:{([\w$]+)}|(\d\d?|[\s\S]))/g;
+ // Check for correct `exec` handling of nonparticipating capturing groups
+ var correctExecNpcg = nativ.exec.call(/()??/, '')[1] === undefined;
+ // Check for ES6 `u` flag support
+ var hasNativeU = function () {
+ var isSupported = true;
+ try {
+ new RegExp('', 'u');
+ } catch (exception) {
+ isSupported = false;
+ }
+ return isSupported;
+ }();
+ // Check for ES6 `y` flag support
+ var hasNativeY = function () {
+ var isSupported = true;
+ try {
+ new RegExp('', 'y');
+ } catch (exception) {
+ isSupported = false;
+ }
+ return isSupported;
+ }();
+ // Check for ES6 `flags` prop support
+ var hasFlagsProp = /a/.flags !== undefined;
+ // Tracker for known flags, including addon flags
+ var registeredFlags = {
+ g: true,
+ i: true,
+ m: true,
+ u: hasNativeU,
+ y: hasNativeY
+ };
+ // Shortcut to `Object.prototype.toString`
+ var toString = {}.toString;
+
+ /* ==============================
+ * Private functions
+ * ============================== */
+
+ /**
+ * Attaches extended data and `XRegExp.prototype` properties to a regex object.
+ *
+ * @private
+ * @param {RegExp} regex Regex to augment.
+ * @param {Array} captureNames Array with capture names, or `null`.
+ * @param {String} xSource XRegExp pattern used to generate `regex`, or `null` if N/A.
+ * @param {String} xFlags XRegExp flags used to generate `regex`, or `null` if N/A.
+ * @param {Boolean} [isInternalOnly=false] Whether the regex will be used only for internal
+ * operations, and never exposed to users. For internal-only regexes, we can improve perf by
+ * skipping some operations like attaching `XRegExp.prototype` properties.
+ * @returns {RegExp} Augmented regex.
+ */
+ function augment(regex, captureNames, xSource, xFlags, isInternalOnly) {
+ var p;
+
+ regex[REGEX_DATA] = {
+ captureNames: captureNames
+ };
+
+ if (isInternalOnly) {
+ return regex;
+ }
+
+ // Can't auto-inherit these since the XRegExp constructor returns a nonprimitive value
+ if (regex.__proto__) {
+ regex.__proto__ = XRegExp.prototype;
+ } else {
+ for (p in XRegExp.prototype) {
+ // An `XRegExp.prototype.hasOwnProperty(p)` check wouldn't be worth it here, since
+ // this is performance sensitive, and enumerable `Object.prototype` or
+ // `RegExp.prototype` extensions exist on `regex.prototype` anyway
+ regex[p] = XRegExp.prototype[p];
+ }
+ }
+
+ regex[REGEX_DATA].source = xSource;
+ // Emulate the ES6 `flags` prop by ensuring flags are in alphabetical order
+ regex[REGEX_DATA].flags = xFlags ? xFlags.split('').sort().join('') : xFlags;
+
+ return regex;
+ }
+
+ /**
+ * Removes any duplicate characters from the provided string.
+ *
+ * @private
+ * @param {String} str String to remove duplicate characters from.
+ * @returns {String} String with any duplicate characters removed.
+ */
+ function clipDuplicates(str) {
+ return nativ.replace.call(str, /([\s\S])(?=[\s\S]*\1)/g, '');
+ }
+
+ /**
+ * Copies a regex object while preserving extended data and augmenting with `XRegExp.prototype`
+ * properties. The copy has a fresh `lastIndex` property (set to zero). Allows adding and removing
+ * flags g and y while copying the regex.
+ *
+ * @private
+ * @param {RegExp} regex Regex to copy.
+ * @param {Object} [options] Options object with optional properties:
+ * <li>`addG` {Boolean} Add flag g while copying the regex.
+ * <li>`addY` {Boolean} Add flag y while copying the regex.
+ * <li>`removeG` {Boolean} Remove flag g while copying the regex.
+ * <li>`removeY` {Boolean} Remove flag y while copying the regex.
+ * <li>`isInternalOnly` {Boolean} Whether the copied regex will be used only for internal
+ * operations, and never exposed to users. For internal-only regexes, we can improve perf by
+ * skipping some operations like attaching `XRegExp.prototype` properties.
+ * @returns {RegExp} Copy of the provided regex, possibly with modified flags.
+ */
+ function copyRegex(regex, options) {
+ if (!XRegExp.isRegExp(regex)) {
+ throw new TypeError('Type RegExp expected');
+ }
+
+ var xData = regex[REGEX_DATA] || {},
+ flags = getNativeFlags(regex),
+ flagsToAdd = '',
+ flagsToRemove = '',
+ xregexpSource = null,
+ xregexpFlags = null;
+
+ options = options || {};
+
+ if (options.removeG) {
+ flagsToRemove += 'g';
+ }
+ if (options.removeY) {
+ flagsToRemove += 'y';
+ }
+ if (flagsToRemove) {
+ flags = nativ.replace.call(flags, new RegExp('[' + flagsToRemove + ']+', 'g'), '');
+ }
+
+ if (options.addG) {
+ flagsToAdd += 'g';
+ }
+ if (options.addY) {
+ flagsToAdd += 'y';
+ }
+ if (flagsToAdd) {
+ flags = clipDuplicates(flags + flagsToAdd);
+ }
+
+ if (!options.isInternalOnly) {
+ if (xData.source !== undefined) {
+ xregexpSource = xData.source;
+ }
+ // null or undefined; don't want to add to `flags` if the previous value was null, since
+ // that indicates we're not tracking original precompilation flags
+ if (xData.flags != null) {
+ // Flags are only added for non-internal regexes by `XRegExp.globalize`. Flags are
+ // never removed for non-internal regexes, so don't need to handle it
+ xregexpFlags = flagsToAdd ? clipDuplicates(xData.flags + flagsToAdd) : xData.flags;
+ }
+ }
+
+ // Augment with `XRegExp.prototype` properties, but use the native `RegExp` constructor to
+ // avoid searching for special tokens. That would be wrong for regexes constructed by
+ // `RegExp`, and unnecessary for regexes constructed by `XRegExp` because the regex has
+ // already undergone the translation to native regex syntax
+ regex = augment(new RegExp(regex.source, flags), hasNamedCapture(regex) ? xData.captureNames.slice(0) : null, xregexpSource, xregexpFlags, options.isInternalOnly);
+
+ return regex;
+ }
+
+ /**
+ * Converts hexadecimal to decimal.
+ *
+ * @private
+ * @param {String} hex
+ * @returns {Number}
+ */
+ function dec(hex) {
+ return parseInt(hex, 16);
+ }
+
+ /**
+ * Returns native `RegExp` flags used by a regex object.
+ *
+ * @private
+ * @param {RegExp} regex Regex to check.
+ * @returns {String} Native flags in use.
+ */
+ function getNativeFlags(regex) {
+ return hasFlagsProp ? regex.flags :
+ // Explicitly using `RegExp.prototype.toString` (rather than e.g. `String` or
+ // concatenation with an empty string) allows this to continue working predictably when
+ // `XRegExp.proptotype.toString` is overriden
+ nativ.exec.call(/\/([a-z]*)$/i, RegExp.prototype.toString.call(regex))[1];
+ }
+
+ /**
+ * Determines whether a regex has extended instance data used to track capture names.
+ *
+ * @private
+ * @param {RegExp} regex Regex to check.
+ * @returns {Boolean} Whether the regex uses named capture.
+ */
+ function hasNamedCapture(regex) {
+ return !!(regex[REGEX_DATA] && regex[REGEX_DATA].captureNames);
+ }
+
+ /**
+ * Converts decimal to hexadecimal.
+ *
+ * @private
+ * @param {Number|String} dec
+ * @returns {String}
+ */
+ function hex(dec) {
+ return parseInt(dec, 10).toString(16);
+ }
+
+ /**
+ * Returns the first index at which a given value can be found in an array.
+ *
+ * @private
+ * @param {Array} array Array to search.
+ * @param {*} value Value to locate in the array.
+ * @returns {Number} Zero-based index at which the item is found, or -1.
+ */
+ function indexOf(array, value) {
+ var len = array.length,
+ i;
+
+ for (i = 0; i < len; ++i) {
+ if (array[i] === value) {
+ return i;
+ }
+ }
+
+ return -1;
+ }
+
+ /**
+ * Determines whether a value is of the specified type, by resolving its internal [[Class]].
+ *
+ * @private
+ * @param {*} value Object to check.
+ * @param {String} type Type to check for, in TitleCase.
+ * @returns {Boolean} Whether the object matches the type.
+ */
+ function isType(value, type) {
+ return toString.call(value) === '[object ' + type + ']';
+ }
+
+ /**
+ * Checks whether the next nonignorable token after the specified position is a quantifier.
+ *
+ * @private
+ * @param {String} pattern Pattern to search within.
+ * @param {Number} pos Index in `pattern` to search at.
+ * @param {String} flags Flags used by the pattern.
+ * @returns {Boolean} Whether the next token is a quantifier.
+ */
+ function isQuantifierNext(pattern, pos, flags) {
+ return nativ.test.call(flags.indexOf('x') > -1 ?
+ // Ignore any leading whitespace, line comments, and inline comments
+ /^(?:\s+|#.*|\(\?#[^)]*\))*(?:[?*+]|{\d+(?:,\d*)?})/ :
+ // Ignore any leading inline comments
+ /^(?:\(\?#[^)]*\))*(?:[?*+]|{\d+(?:,\d*)?})/, pattern.slice(pos));
+ }
+
+ /**
+ * Pads the provided string with as many leading zeros as needed to get to length 4. Used to produce
+ * fixed-length hexadecimal values.
+ *
+ * @private
+ * @param {String} str
+ * @returns {String}
+ */
+ function pad4(str) {
+ while (str.length < 4) {
+ str = '0' + str;
+ }
+ return str;
+ }
+
+ /**
+ * Checks for flag-related errors, and strips/applies flags in a leading mode modifier. Offloads
+ * the flag preparation logic from the `XRegExp` constructor.
+ *
+ * @private
+ * @param {String} pattern Regex pattern, possibly with a leading mode modifier.
+ * @param {String} flags Any combination of flags.
+ * @returns {Object} Object with properties `pattern` and `flags`.
+ */
+ function prepareFlags(pattern, flags) {
+ var i;
+
+ // Recent browsers throw on duplicate flags, so copy this behavior for nonnative flags
+ if (clipDuplicates(flags) !== flags) {
+ throw new SyntaxError('Invalid duplicate regex flag ' + flags);
+ }
+
+ // Strip and apply a leading mode modifier with any combination of flags except g or y
+ pattern = nativ.replace.call(pattern, /^\(\?([\w$]+)\)/, function ($0, $1) {
+ if (nativ.test.call(/[gy]/, $1)) {
+ throw new SyntaxError('Cannot use flag g or y in mode modifier ' + $0);
+ }
+ // Allow duplicate flags within the mode modifier
+ flags = clipDuplicates(flags + $1);
+ return '';
+ });
+
+ // Throw on unknown native or nonnative flags
+ for (i = 0; i < flags.length; ++i) {
+ if (!registeredFlags[flags.charAt(i)]) {
+ throw new SyntaxError('Unknown regex flag ' + flags.charAt(i));
+ }
+ }
+
+ return {
+ pattern: pattern,
+ flags: flags
+ };
+ }
+
+ /**
+ * Prepares an options object from the given value.
+ *
+ * @private
+ * @param {String|Object} value Value to convert to an options object.
+ * @returns {Object} Options object.
+ */
+ function prepareOptions(value) {
+ var options = {};
+
+ if (isType(value, 'String')) {
+ XRegExp.forEach(value, /[^\s,]+/, function (match) {
+ options[match] = true;
+ });
+
+ return options;
+ }
+
+ return value;
+ }
+
+ /**
+ * Registers a flag so it doesn't throw an 'unknown flag' error.
+ *
+ * @private
+ * @param {String} flag Single-character flag to register.
+ */
+ function registerFlag(flag) {
+ if (!/^[\w$]$/.test(flag)) {
+ throw new Error('Flag must be a single character A-Za-z0-9_$');
+ }
+
+ registeredFlags[flag] = true;
+ }
+
+ /**
+ * Runs built-in and custom regex syntax tokens in reverse insertion order at the specified
+ * position, until a match is found.
+ *
+ * @private
+ * @param {String} pattern Original pattern from which an XRegExp object is being built.
+ * @param {String} flags Flags being used to construct the regex.
+ * @param {Number} pos Position to search for tokens within `pattern`.
+ * @param {Number} scope Regex scope to apply: 'default' or 'class'.
+ * @param {Object} context Context object to use for token handler functions.
+ * @returns {Object} Object with properties `matchLength`, `output`, and `reparse`; or `null`.
+ */
+ function runTokens(pattern, flags, pos, scope, context) {
+ var i = tokens.length,
+ leadChar = pattern.charAt(pos),
+ result = null,
+ match,
+ t;
+
+ // Run in reverse insertion order
+ while (i--) {
+ t = tokens[i];
+ if (t.leadChar && t.leadChar !== leadChar || t.scope !== scope && t.scope !== 'all' || t.flag && flags.indexOf(t.flag) === -1) {
+ continue;
+ }
+
+ match = XRegExp.exec(pattern, t.regex, pos, 'sticky');
+ if (match) {
+ result = {
+ matchLength: match[0].length,
+ output: t.handler.call(context, match, scope, flags),
+ reparse: t.reparse
+ };
+ // Finished with token tests
+ break;
+ }
+ }
+
+ return result;
+ }
+
+ /**
+ * Enables or disables implicit astral mode opt-in. When enabled, flag A is automatically added to
+ * all new regexes created by XRegExp. This causes an error to be thrown when creating regexes if
+ * the Unicode Base addon is not available, since flag A is registered by that addon.
+ *
+ * @private
+ * @param {Boolean} on `true` to enable; `false` to disable.
+ */
+ function setAstral(on) {
+ features.astral = on;
+ }
+
+ /**
+ * Enables or disables native method overrides.
+ *
+ * @private
+ * @param {Boolean} on `true` to enable; `false` to disable.
+ */
+ function setNatives(on) {
+ RegExp.prototype.exec = (on ? fixed : nativ).exec;
+ RegExp.prototype.test = (on ? fixed : nativ).test;
+ String.prototype.match = (on ? fixed : nativ).match;
+ String.prototype.replace = (on ? fixed : nativ).replace;
+ String.prototype.split = (on ? fixed : nativ).split;
+
+ features.natives = on;
+ }
+
+ /**
+ * Returns the object, or throws an error if it is `null` or `undefined`. This is used to follow
+ * the ES5 abstract operation `ToObject`.
+ *
+ * @private
+ * @param {*} value Object to check and return.
+ * @returns {*} The provided object.
+ */
+ function toObject(value) {
+ // null or undefined
+ if (value == null) {
+ throw new TypeError('Cannot convert null or undefined to object');
+ }
+
+ return value;
+ }
+
+ /* ==============================
+ * Constructor
+ * ============================== */
+
+ /**
+ * Creates an extended regular expression object for matching text with a pattern. Differs from a
+ * native regular expression in that additional syntax and flags are supported. The returned object
+ * is in fact a native `RegExp` and works with all native methods.
+ *
+ * @class XRegExp
+ * @constructor
+ * @param {String|RegExp} pattern Regex pattern string, or an existing regex object to copy.
+ * @param {String} [flags] Any combination of flags.
+ * Native flags:
+ * <li>`g` - global
+ * <li>`i` - ignore case
+ * <li>`m` - multiline anchors
+ * <li>`u` - unicode (ES6)
+ * <li>`y` - sticky (Firefox 3+, ES6)
+ * Additional XRegExp flags:
+ * <li>`n` - explicit capture
+ * <li>`s` - dot matches all (aka singleline)
+ * <li>`x` - free-spacing and line comments (aka extended)
+ * <li>`A` - astral (requires the Unicode Base addon)
+ * Flags cannot be provided when constructing one `RegExp` from another.
+ * @returns {RegExp} Extended regular expression object.
+ * @example
+ *
+ * // With named capture and flag x
+ * XRegExp('(?<year> [0-9]{4} ) -? # year \n\
+ * (?<month> [0-9]{2} ) -? # month \n\
+ * (?<day> [0-9]{2} ) # day ', 'x');
+ *
+ * // Providing a regex object copies it. Native regexes are recompiled using native (not XRegExp)
+ * // syntax. Copies maintain extended data, are augmented with `XRegExp.prototype` properties, and
+ * // have fresh `lastIndex` properties (set to zero).
+ * XRegExp(/regex/);
+ */
+ function XRegExp(pattern, flags) {
+ var context = {
+ hasNamedCapture: false,
+ captureNames: []
+ },
+ scope = defaultScope,
+ output = '',
+ pos = 0,
+ result,
+ token,
+ generated,
+ appliedPattern,
+ appliedFlags;
+
+ if (XRegExp.isRegExp(pattern)) {
+ if (flags !== undefined) {
+ throw new TypeError('Cannot supply flags when copying a RegExp');
+ }
+ return copyRegex(pattern);
+ }
+
+ // Copy the argument behavior of `RegExp`
+ pattern = pattern === undefined ? '' : String(pattern);
+ flags = flags === undefined ? '' : String(flags);
+
+ if (XRegExp.isInstalled('astral') && flags.indexOf('A') === -1) {
+ // This causes an error to be thrown if the Unicode Base addon is not available
+ flags += 'A';
+ }
+
+ if (!patternCache[pattern]) {
+ patternCache[pattern] = {};
+ }
+
+ if (!patternCache[pattern][flags]) {
+ // Check for flag-related errors, and strip/apply flags in a leading mode modifier
+ result = prepareFlags(pattern, flags);
+ appliedPattern = result.pattern;
+ appliedFlags = result.flags;
+
+ // Use XRegExp's tokens to translate the pattern to a native regex pattern.
+ // `appliedPattern.length` may change on each iteration if tokens use `reparse`
+ while (pos < appliedPattern.length) {
+ do {
+ // Check for custom tokens at the current position
+ result = runTokens(appliedPattern, appliedFlags, pos, scope, context);
+ // If the matched token used the `reparse` option, splice its output into the
+ // pattern before running tokens again at the same position
+ if (result && result.reparse) {
+ appliedPattern = appliedPattern.slice(0, pos) + result.output + appliedPattern.slice(pos + result.matchLength);
+ }
+ } while (result && result.reparse);
+
+ if (result) {
+ output += result.output;
+ pos += result.matchLength || 1;
+ } else {
+ // Get the native token at the current position
+ token = XRegExp.exec(appliedPattern, nativeTokens[scope], pos, 'sticky')[0];
+ output += token;
+ pos += token.length;
+ if (token === '[' && scope === defaultScope) {
+ scope = classScope;
+ } else if (token === ']' && scope === classScope) {
+ scope = defaultScope;
+ }
+ }
+ }
+
+ patternCache[pattern][flags] = {
+ // Cleanup token cruft: repeated `(?:)(?:)` and leading/trailing `(?:)`
+ pattern: nativ.replace.call(output, /\(\?:\)(?:[*+?]|\{\d+(?:,\d*)?})?\??(?=\(\?:\))|^\(\?:\)(?:[*+?]|\{\d+(?:,\d*)?})?\??|\(\?:\)(?:[*+?]|\{\d+(?:,\d*)?})?\??$/g, ''),
+ // Strip all but native flags
+ flags: nativ.replace.call(appliedFlags, /[^gimuy]+/g, ''),
+ // `context.captureNames` has an item for each capturing group, even if unnamed
+ captures: context.hasNamedCapture ? context.captureNames : null
+ };
+ }
+
+ generated = patternCache[pattern][flags];
+ return augment(new RegExp(generated.pattern, generated.flags), generated.captures, pattern, flags);
+ };
+
+ // Add `RegExp.prototype` to the prototype chain
+ XRegExp.prototype = new RegExp();
+
+ /* ==============================
+ * Public properties
+ * ============================== */
+
+ /**
+ * The XRegExp version number as a string containing three dot-separated parts. For example,
+ * '2.0.0-beta-3'.
+ *
+ * @static
+ * @memberOf XRegExp
+ * @type String
+ */
+ XRegExp.version = '3.1.0-dev';
+
+ /* ==============================
+ * Public methods
+ * ============================== */
+
+ /**
+ * Extends XRegExp syntax and allows custom flags. This is used internally and can be used to
+ * create XRegExp addons. If more than one token can match the same string, the last added wins.
+ *
+ * @memberOf XRegExp
+ * @param {RegExp} regex Regex object that matches the new token.
+ * @param {Function} handler Function that returns a new pattern string (using native regex syntax)
+ * to replace the matched token within all future XRegExp regexes. Has access to persistent
+ * properties of the regex being built, through `this`. Invoked with three arguments:
+ * <li>The match array, with named backreference properties.
+ * <li>The regex scope where the match was found: 'default' or 'class'.
+ * <li>The flags used by the regex, including any flags in a leading mode modifier.
+ * The handler function becomes part of the XRegExp construction process, so be careful not to
+ * construct XRegExps within the function or you will trigger infinite recursion.
+ * @param {Object} [options] Options object with optional properties:
+ * <li>`scope` {String} Scope where the token applies: 'default', 'class', or 'all'.
+ * <li>`flag` {String} Single-character flag that triggers the token. This also registers the
+ * flag, which prevents XRegExp from throwing an 'unknown flag' error when the flag is used.
+ * <li>`optionalFlags` {String} Any custom flags checked for within the token `handler` that are
+ * not required to trigger the token. This registers the flags, to prevent XRegExp from
+ * throwing an 'unknown flag' error when any of the flags are used.
+ * <li>`reparse` {Boolean} Whether the `handler` function's output should not be treated as
+ * final, and instead be reparseable by other tokens (including the current token). Allows
+ * token chaining or deferring.
+ * <li>`leadChar` {String} Single character that occurs at the beginning of any successful match
+ * of the token (not always applicable). This doesn't change the behavior of the token unless
+ * you provide an erroneous value. However, providing it can increase the token's performance
+ * since the token can be skipped at any positions where this character doesn't appear.
+ * @example
+ *
+ * // Basic usage: Add \a for the ALERT control code
+ * XRegExp.addToken(
+ * /\\a/,
+ * function() {return '\\x07';},
+ * {scope: 'all'}
+ * );
+ * XRegExp('\\a[\\a-\\n]+').test('\x07\n\x07'); // -> true
+ *
+ * // Add the U (ungreedy) flag from PCRE and RE2, which reverses greedy and lazy quantifiers.
+ * // Since `scope` is not specified, it uses 'default' (i.e., transformations apply outside of
+ * // character classes only)
+ * XRegExp.addToken(
+ * /([?*+]|{\d+(?:,\d*)?})(\??)/,
+ * function(match) {return match[1] + (match[2] ? '' : '?');},
+ * {flag: 'U'}
+ * );
+ * XRegExp('a+', 'U').exec('aaa')[0]; // -> 'a'
+ * XRegExp('a+?', 'U').exec('aaa')[0]; // -> 'aaa'
+ */
+ XRegExp.addToken = function (regex, handler, options) {
+ options = options || {};
+ var optionalFlags = options.optionalFlags,
+ i;
+
+ if (options.flag) {
+ registerFlag(options.flag);
+ }
+
+ if (optionalFlags) {
+ optionalFlags = nativ.split.call(optionalFlags, '');
+ for (i = 0; i < optionalFlags.length; ++i) {
+ registerFlag(optionalFlags[i]);
+ }
+ }
+
+ // Add to the private list of syntax tokens
+ tokens.push({
+ regex: copyRegex(regex, {
+ addG: true,
+ addY: hasNativeY,
+ isInternalOnly: true
+ }),
+ handler: handler,
+ scope: options.scope || defaultScope,
+ flag: options.flag,
+ reparse: options.reparse,
+ leadChar: options.leadChar
+ });
+
+ // Reset the pattern cache used by the `XRegExp` constructor, since the same pattern and
+ // flags might now produce different results
+ XRegExp.cache.flush('patterns');
+ };
+
+ /**
+ * Caches and returns the result of calling `XRegExp(pattern, flags)`. On any subsequent call with
+ * the same pattern and flag combination, the cached copy of the regex is returned.
+ *
+ * @memberOf XRegExp
+ * @param {String} pattern Regex pattern string.
+ * @param {String} [flags] Any combination of XRegExp flags.
+ * @returns {RegExp} Cached XRegExp object.
+ * @example
+ *
+ * while (match = XRegExp.cache('.', 'gs').exec(str)) {
+ * // The regex is compiled once only
+ * }
+ */
+ XRegExp.cache = function (pattern, flags) {
+ if (!regexCache[pattern]) {
+ regexCache[pattern] = {};
+ }
+ return regexCache[pattern][flags] || (regexCache[pattern][flags] = XRegExp(pattern, flags));
+ };
+
+ // Intentionally undocumented
+ XRegExp.cache.flush = function (cacheName) {
+ if (cacheName === 'patterns') {
+ // Flush the pattern cache used by the `XRegExp` constructor
+ patternCache = {};
+ } else {
+ // Flush the regex cache populated by `XRegExp.cache`
+ regexCache = {};
+ }
+ };
+
+ /**
+ * Escapes any regular expression metacharacters, for use when matching literal strings. The result
+ * can safely be used at any point within a regex that uses any flags.
+ *
+ * @memberOf XRegExp
+ * @param {String} str String to escape.
+ * @returns {String} String with regex metacharacters escaped.
+ * @example
+ *
+ * XRegExp.escape('Escaped? <.>');
+ * // -> 'Escaped\?\ <\.>'
+ */
+ XRegExp.escape = function (str) {
+ return nativ.replace.call(toObject(str), /[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&');
+ };
+
+ /**
+ * Executes a regex search in a specified string. Returns a match array or `null`. If the provided
+ * regex uses named capture, named backreference properties are included on the match array.
+ * Optional `pos` and `sticky` arguments specify the search start position, and whether the match
+ * must start at the specified position only. The `lastIndex` property of the provided regex is not
+ * used, but is updated for compatibility. Also fixes browser bugs compared to the native
+ * `RegExp.prototype.exec` and can be used reliably cross-browser.
+ *
+ * @memberOf XRegExp
+ * @param {String} str String to search.
+ * @param {RegExp} regex Regex to search with.
+ * @param {Number} [pos=0] Zero-based index at which to start the search.
+ * @param {Boolean|String} [sticky=false] Whether the match must start at the specified position
+ * only. The string `'sticky'` is accepted as an alternative to `true`.
+ * @returns {Array} Match array with named backreference properties, or `null`.
+ * @example
+ *
+ * // Basic use, with named backreference
+ * var match = XRegExp.exec('U+2620', XRegExp('U\\+(?<hex>[0-9A-F]{4})'));
+ * match.hex; // -> '2620'
+ *
+ * // With pos and sticky, in a loop
+ * var pos = 2, result = [], match;
+ * while (match = XRegExp.exec('<1><2><3><4>5<6>', /<(\d)>/, pos, 'sticky')) {
+ * result.push(match[1]);
+ * pos = match.index + match[0].length;
+ * }
+ * // result -> ['2', '3', '4']
+ */
+ XRegExp.exec = function (str, regex, pos, sticky) {
+ var cacheKey = 'g',
+ addY = false,
+ match,
+ r2;
+
+ addY = hasNativeY && !!(sticky || regex.sticky && sticky !== false);
+ if (addY) {
+ cacheKey += 'y';
+ }
+
+ regex[REGEX_DATA] = regex[REGEX_DATA] || {};
+
+ // Shares cached copies with `XRegExp.match`/`replace`
+ r2 = regex[REGEX_DATA][cacheKey] || (regex[REGEX_DATA][cacheKey] = copyRegex(regex, {
+ addG: true,
+ addY: addY,
+ removeY: sticky === false,
+ isInternalOnly: true
+ }));
+
+ r2.lastIndex = pos = pos || 0;
+
+ // Fixed `exec` required for `lastIndex` fix, named backreferences, etc.
+ match = fixed.exec.call(r2, str);
+
+ if (sticky && match && match.index !== pos) {
+ match = null;
+ }
+
+ if (regex.global) {
+ regex.lastIndex = match ? r2.lastIndex : 0;
+ }
+
+ return match;
+ };
+
+ /**
+ * Executes a provided function once per regex match. Searches always start at the beginning of the
+ * string and continue until the end, regardless of the state of the regex's `global` property and
+ * initial `lastIndex`.
+ *
+ * @memberOf XRegExp
+ * @param {String} str String to search.
+ * @param {RegExp} regex Regex to search with.
+ * @param {Function} callback Function to execute for each match. Invoked with four arguments:
+ * <li>The match array, with named backreference properties.
+ * <li>The zero-based match index.
+ * <li>The string being traversed.
+ * <li>The regex object being used to traverse the string.
+ * @example
+ *
+ * // Extracts every other digit from a string
+ * var evens = [];
+ * XRegExp.forEach('1a2345', /\d/, function(match, i) {
+ * if (i % 2) evens.push(+match[0]);
+ * });
+ * // evens -> [2, 4]
+ */
+ XRegExp.forEach = function (str, regex, callback) {
+ var pos = 0,
+ i = -1,
+ match;
+
+ while (match = XRegExp.exec(str, regex, pos)) {
+ // Because `regex` is provided to `callback`, the function could use the deprecated/
+ // nonstandard `RegExp.prototype.compile` to mutate the regex. However, since
+ // `XRegExp.exec` doesn't use `lastIndex` to set the search position, this can't lead
+ // to an infinite loop, at least. Actually, because of the way `XRegExp.exec` caches
+ // globalized versions of regexes, mutating the regex will not have any effect on the
+ // iteration or matched strings, which is a nice side effect that brings extra safety
+ callback(match, ++i, str, regex);
+
+ pos = match.index + (match[0].length || 1);
+ }
+ };
+
+ /**
+ * Copies a regex object and adds flag `g`. The copy maintains extended data, is augmented with
+ * `XRegExp.prototype` properties, and has a fresh `lastIndex` property (set to zero). Native
+ * regexes are not recompiled using XRegExp syntax.
+ *
+ * @memberOf XRegExp
+ * @param {RegExp} regex Regex to globalize.
+ * @returns {RegExp} Copy of the provided regex with flag `g` added.
+ * @example
+ *
+ * var globalCopy = XRegExp.globalize(/regex/);
+ * globalCopy.global; // -> true
+ */
+ XRegExp.globalize = function (regex) {
+ return copyRegex(regex, { addG: true });
+ };
+
+ /**
+ * Installs optional features according to the specified options. Can be undone using
+ * {@link #XRegExp.uninstall}.
+ *
+ * @memberOf XRegExp
+ * @param {Object|String} options Options object or string.
+ * @example
+ *
+ * // With an options object
+ * XRegExp.install({
+ * // Enables support for astral code points in Unicode addons (implicitly sets flag A)
+ * astral: true,
+ *
+ * // Overrides native regex methods with fixed/extended versions that support named
+ * // backreferences and fix numerous cross-browser bugs
+ * natives: true
+ * });
+ *
+ * // With an options string
+ * XRegExp.install('astral natives');
+ */
+ XRegExp.install = function (options) {
+ options = prepareOptions(options);
+
+ if (!features.astral && options.astral) {
+ setAstral(true);
+ }
+
+ if (!features.natives && options.natives) {
+ setNatives(true);
+ }
+ };
+
+ /**
+ * Checks whether an individual optional feature is installed.
+ *
+ * @memberOf XRegExp
+ * @param {String} feature Name of the feature to check. One of:
+ * <li>`natives`
+ * <li>`astral`
+ * @returns {Boolean} Whether the feature is installed.
+ * @example
+ *
+ * XRegExp.isInstalled('natives');
+ */
+ XRegExp.isInstalled = function (feature) {
+ return !!features[feature];
+ };
+
+ /**
+ * Returns `true` if an object is a regex; `false` if it isn't. This works correctly for regexes
+ * created in another frame, when `instanceof` and `constructor` checks would fail.
+ *
+ * @memberOf XRegExp
+ * @param {*} value Object to check.
+ * @returns {Boolean} Whether the object is a `RegExp` object.
+ * @example
+ *
+ * XRegExp.isRegExp('string'); // -> false
+ * XRegExp.isRegExp(/regex/i); // -> true
+ * XRegExp.isRegExp(RegExp('^', 'm')); // -> true
+ * XRegExp.isRegExp(XRegExp('(?s).')); // -> true
+ */
+ XRegExp.isRegExp = function (value) {
+ return toString.call(value) === '[object RegExp]';
+ //return isType(value, 'RegExp');
+ };
+
+ /**
+ * Returns the first matched string, or in global mode, an array containing all matched strings.
+ * This is essentially a more convenient re-implementation of `String.prototype.match` that gives
+ * the result types you actually want (string instead of `exec`-style array in match-first mode,
+ * and an empty array instead of `null` when no matches are found in match-all mode). It also lets
+ * you override flag g and ignore `lastIndex`, and fixes browser bugs.
+ *
+ * @memberOf XRegExp
+ * @param {String} str String to search.
+ * @param {RegExp} regex Regex to search with.
+ * @param {String} [scope='one'] Use 'one' to return the first match as a string. Use 'all' to
+ * return an array of all matched strings. If not explicitly specified and `regex` uses flag g,
+ * `scope` is 'all'.
+ * @returns {String|Array} In match-first mode: First match as a string, or `null`. In match-all
+ * mode: Array of all matched strings, or an empty array.
+ * @example
+ *
+ * // Match first
+ * XRegExp.match('abc', /\w/); // -> 'a'
+ * XRegExp.match('abc', /\w/g, 'one'); // -> 'a'
+ * XRegExp.match('abc', /x/g, 'one'); // -> null
+ *
+ * // Match all
+ * XRegExp.match('abc', /\w/g); // -> ['a', 'b', 'c']
+ * XRegExp.match('abc', /\w/, 'all'); // -> ['a', 'b', 'c']
+ * XRegExp.match('abc', /x/, 'all'); // -> []
+ */
+ XRegExp.match = function (str, regex, scope) {
+ var global = regex.global && scope !== 'one' || scope === 'all',
+ cacheKey = (global ? 'g' : '') + (regex.sticky ? 'y' : '') || 'noGY',
+ result,
+ r2;
+
+ regex[REGEX_DATA] = regex[REGEX_DATA] || {};
+
+ // Shares cached copies with `XRegExp.exec`/`replace`
+ r2 = regex[REGEX_DATA][cacheKey] || (regex[REGEX_DATA][cacheKey] = copyRegex(regex, {
+ addG: !!global,
+ addY: !!regex.sticky,
+ removeG: scope === 'one',
+ isInternalOnly: true
+ }));
+
+ result = nativ.match.call(toObject(str), r2);
+
+ if (regex.global) {
+ regex.lastIndex = scope === 'one' && result ?
+ // Can't use `r2.lastIndex` since `r2` is nonglobal in this case
+ result.index + result[0].length : 0;
+ }
+
+ return global ? result || [] : result && result[0];
+ };
+
+ /**
+ * Retrieves the matches from searching a string using a chain of regexes that successively search
+ * within previous matches. The provided `chain` array can contain regexes and or objects with
+ * `regex` and `backref` properties. When a backreference is specified, the named or numbered
+ * backreference is passed forward to the next regex or returned.
+ *
+ * @memberOf XRegExp
+ * @param {String} str String to search.
+ * @param {Array} chain Regexes that each search for matches within preceding results.
+ * @returns {Array} Matches by the last regex in the chain, or an empty array.
+ * @example
+ *
+ * // Basic usage; matches numbers within <b> tags
+ * XRegExp.matchChain('1 <b>2</b> 3 <b>4 a 56</b>', [
+ * XRegExp('(?is)<b>.*?</b>'),
+ * /\d+/
+ * ]);
+ * // -> ['2', '4', '56']
+ *
+ * // Passing forward and returning specific backreferences
+ * html = '<a href="http://xregexp.com/api/">XRegExp</a>\
+ * <a href="http://www.google.com/">Google</a>';
+ * XRegExp.matchChain(html, [
+ * {regex: /<a href="([^"]+)">/i, backref: 1},
+ * {regex: XRegExp('(?i)^https?://(?<domain>[^/?#]+)'), backref: 'domain'}
+ * ]);
+ * // -> ['xregexp.com', 'www.google.com']
+ */
+ XRegExp.matchChain = function (str, chain) {
+ return function recurseChain(values, level) {
+ var item = chain[level].regex ? chain[level] : { regex: chain[level] },
+ matches = [],
+ addMatch = function addMatch(match) {
+ if (item.backref) {
+ /* Safari 4.0.5 (but not 5.0.5+) inappropriately uses sparse arrays to hold
+ * the `undefined`s for backreferences to nonparticipating capturing
+ * groups. In such cases, a `hasOwnProperty` or `in` check on its own would
+ * inappropriately throw the exception, so also check if the backreference
+ * is a number that is within the bounds of the array.
+ */
+ if (!(match.hasOwnProperty(item.backref) || +item.backref < match.length)) {
+ throw new ReferenceError('Backreference to undefined group: ' + item.backref);
+ }
+
+ matches.push(match[item.backref] || '');
+ } else {
+ matches.push(match[0]);
+ }
+ },
+ i;
+
+ for (i = 0; i < values.length; ++i) {
+ XRegExp.forEach(values[i], item.regex, addMatch);
+ }
+
+ return level === chain.length - 1 || !matches.length ? matches : recurseChain(matches, level + 1);
+ }([str], 0);
+ };
+
+ /**
+ * Returns a new string with one or all matches of a pattern replaced. The pattern can be a string
+ * or regex, and the replacement can be a string or a function to be called for each match. To
+ * perform a global search and replace, use the optional `scope` argument or include flag g if using
+ * a regex. Replacement strings can use `${n}` for named and numbered backreferences. Replacement
+ * functions can use named backreferences via `arguments[0].name`. Also fixes browser bugs compared
+ * to the native `String.prototype.replace` and can be used reliably cross-browser.
+ *
+ * @memberOf XRegExp
+ * @param {String} str String to search.
+ * @param {RegExp|String} search Search pattern to be replaced.
+ * @param {String|Function} replacement Replacement string or a function invoked to create it.
+ * Replacement strings can include special replacement syntax:
+ * <li>$$ - Inserts a literal $ character.
+ * <li>$&, $0 - Inserts the matched substring.
+ * <li>$` - Inserts the string that precedes the matched substring (left context).
+ * <li>$' - Inserts the string that follows the matched substring (right context).
+ * <li>$n, $nn - Where n/nn are digits referencing an existent capturing group, inserts
+ * backreference n/nn.
+ * <li>${n} - Where n is a name or any number of digits that reference an existent capturing
+ * group, inserts backreference n.
+ * Replacement functions are invoked with three or more arguments:
+ * <li>The matched substring (corresponds to $& above). Named backreferences are accessible as
+ * properties of this first argument.
+ * <li>0..n arguments, one for each backreference (corresponding to $1, $2, etc. above).
+ * <li>The zero-based index of the match within the total search string.
+ * <li>The total string being searched.
+ * @param {String} [scope='one'] Use 'one' to replace the first match only, or 'all'. If not
+ * explicitly specified and using a regex with flag g, `scope` is 'all'.
+ * @returns {String} New string with one or all matches replaced.
+ * @example
+ *
+ * // Regex search, using named backreferences in replacement string
+ * var name = XRegExp('(?<first>\\w+) (?<last>\\w+)');
+ * XRegExp.replace('John Smith', name, '${last}, ${first}');
+ * // -> 'Smith, John'
+ *
+ * // Regex search, using named backreferences in replacement function
+ * XRegExp.replace('John Smith', name, function(match) {
+ * return match.last + ', ' + match.first;
+ * });
+ * // -> 'Smith, John'
+ *
+ * // String search, with replace-all
+ * XRegExp.replace('RegExp builds RegExps', 'RegExp', 'XRegExp', 'all');
+ * // -> 'XRegExp builds XRegExps'
+ */
+ XRegExp.replace = function (str, search, replacement, scope) {
+ var isRegex = XRegExp.isRegExp(search),
+ global = search.global && scope !== 'one' || scope === 'all',
+ cacheKey = (global ? 'g' : '') + (search.sticky ? 'y' : '') || 'noGY',
+ s2 = search,
+ result;
+
+ if (isRegex) {
+ search[REGEX_DATA] = search[REGEX_DATA] || {};
+
+ // Shares cached copies with `XRegExp.exec`/`match`. Since a copy is used, `search`'s
+ // `lastIndex` isn't updated *during* replacement iterations
+ s2 = search[REGEX_DATA][cacheKey] || (search[REGEX_DATA][cacheKey] = copyRegex(search, {
+ addG: !!global,
+ addY: !!search.sticky,
+ removeG: scope === 'one',
+ isInternalOnly: true
+ }));
+ } else if (global) {
+ s2 = new RegExp(XRegExp.escape(String(search)), 'g');
+ }
+
+ // Fixed `replace` required for named backreferences, etc.
+ result = fixed.replace.call(toObject(str), s2, replacement);
+
+ if (isRegex && search.global) {
+ // Fixes IE, Safari bug (last tested IE 9, Safari 5.1)
+ search.lastIndex = 0;
+ }
+
+ return result;
+ };
+
+ /**
+ * Performs batch processing of string replacements. Used like {@link #XRegExp.replace}, but
+ * accepts an array of replacement details. Later replacements operate on the output of earlier
+ * replacements. Replacement details are accepted as an array with a regex or string to search for,
+ * the replacement string or function, and an optional scope of 'one' or 'all'. Uses the XRegExp
+ * replacement text syntax, which supports named backreference properties via `${name}`.
+ *
+ * @memberOf XRegExp
+ * @param {String} str String to search.
+ * @param {Array} replacements Array of replacement detail arrays.
+ * @returns {String} New string with all replacements.
+ * @example
+ *
+ * str = XRegExp.replaceEach(str, [
+ * [XRegExp('(?<name>a)'), 'z${name}'],
+ * [/b/gi, 'y'],
+ * [/c/g, 'x', 'one'], // scope 'one' overrides /g
+ * [/d/, 'w', 'all'], // scope 'all' overrides lack of /g
+ * ['e', 'v', 'all'], // scope 'all' allows replace-all for strings
+ * [/f/g, function($0) {
+ * return $0.toUpperCase();
+ * }]
+ * ]);
+ */
+ XRegExp.replaceEach = function (str, replacements) {
+ var i, r;
+
+ for (i = 0; i < replacements.length; ++i) {
+ r = replacements[i];
+ str = XRegExp.replace(str, r[0], r[1], r[2]);
+ }
+
+ return str;
+ };
+
+ /**
+ * Splits a string into an array of strings using a regex or string separator. Matches of the
+ * separator are not included in the result array. However, if `separator` is a regex that contains
+ * capturing groups, backreferences are spliced into the result each time `separator` is matched.
+ * Fixes browser bugs compared to the native `String.prototype.split` and can be used reliably
+ * cross-browser.
+ *
+ * @memberOf XRegExp
+ * @param {String} str String to split.
+ * @param {RegExp|String} separator Regex or string to use for separating the string.
+ * @param {Number} [limit] Maximum number of items to include in the result array.
+ * @returns {Array} Array of substrings.
+ * @example
+ *
+ * // Basic use
+ * XRegExp.split('a b c', ' ');
+ * // -> ['a', 'b', 'c']
+ *
+ * // With limit
+ * XRegExp.split('a b c', ' ', 2);
+ * // -> ['a', 'b']
+ *
+ * // Backreferences in result array
+ * XRegExp.split('..word1..', /([a-z]+)(\d+)/i);
+ * // -> ['..', 'word', '1', '..']
+ */
+ XRegExp.split = function (str, separator, limit) {
+ return fixed.split.call(toObject(str), separator, limit);
+ };
+
+ /**
+ * Executes a regex search in a specified string. Returns `true` or `false`. Optional `pos` and
+ * `sticky` arguments specify the search start position, and whether the match must start at the
+ * specified position only. The `lastIndex` property of the provided regex is not used, but is
+ * updated for compatibility. Also fixes browser bugs compared to the native
+ * `RegExp.prototype.test` and can be used reliably cross-browser.
+ *
+ * @memberOf XRegExp
+ * @param {String} str String to search.
+ * @param {RegExp} regex Regex to search with.
+ * @param {Number} [pos=0] Zero-based index at which to start the search.
+ * @param {Boolean|String} [sticky=false] Whether the match must start at the specified position
+ * only. The string `'sticky'` is accepted as an alternative to `true`.
+ * @returns {Boolean} Whether the regex matched the provided value.
+ * @example
+ *
+ * // Basic use
+ * XRegExp.test('abc', /c/); // -> true
+ *
+ * // With pos and sticky
+ * XRegExp.test('abc', /c/, 0, 'sticky'); // -> false
+ * XRegExp.test('abc', /c/, 2, 'sticky'); // -> true
+ */
+ XRegExp.test = function (str, regex, pos, sticky) {
+ // Do this the easy way :-)
+ return !!XRegExp.exec(str, regex, pos, sticky);
+ };
+
+ /**
+ * Uninstalls optional features according to the specified options. All optional features start out
+ * uninstalled, so this is used to undo the actions of {@link #XRegExp.install}.
+ *
+ * @memberOf XRegExp
+ * @param {Object|String} options Options object or string.
+ * @example
+ *
+ * // With an options object
+ * XRegExp.uninstall({
+ * // Disables support for astral code points in Unicode addons
+ * astral: true,
+ *
+ * // Restores native regex methods
+ * natives: true
+ * });
+ *
+ * // With an options string
+ * XRegExp.uninstall('astral natives');
+ */
+ XRegExp.uninstall = function (options) {
+ options = prepareOptions(options);
+
+ if (features.astral && options.astral) {
+ setAstral(false);
+ }
+
+ if (features.natives && options.natives) {
+ setNatives(false);
+ }
+ };
+
+ /**
+ * Returns an XRegExp object that is the union of the given patterns. Patterns can be provided as
+ * regex objects or strings. Metacharacters are escaped in patterns provided as strings.
+ * Backreferences in provided regex objects are automatically renumbered to work correctly within
+ * the larger combined pattern. Native flags used by provided regexes are ignored in favor of the
+ * `flags` argument.
+ *
+ * @memberOf XRegExp
+ * @param {Array} patterns Regexes and strings to combine.
+ * @param {String} [flags] Any combination of XRegExp flags.
+ * @returns {RegExp} Union of the provided regexes and strings.
+ * @example
+ *
+ * XRegExp.union(['a+b*c', /(dogs)\1/, /(cats)\1/], 'i');
+ * // -> /a\+b\*c|(dogs)\1|(cats)\2/i
+ */
+ XRegExp.union = function (patterns, flags) {
+ var parts = /(\()(?!\?)|\\([1-9]\d*)|\\[\s\S]|\[(?:[^\\\]]|\\[\s\S])*]/g,
+ output = [],
+ numCaptures = 0,
+ numPriorCaptures,
+ captureNames,
+ pattern,
+ rewrite = function rewrite(match, paren, backref) {
+ var name = captureNames[numCaptures - numPriorCaptures];
+
+ // Capturing group
+ if (paren) {
+ ++numCaptures;
+ // If the current capture has a name, preserve the name
+ if (name) {
+ return '(?<' + name + '>';
+ }
+ // Backreference
+ } else if (backref) {
+ // Rewrite the backreference
+ return '\\' + (+backref + numPriorCaptures);
+ }
+
+ return match;
+ },
+ i;
+
+ if (!(isType(patterns, 'Array') && patterns.length)) {
+ throw new TypeError('Must provide a nonempty array of patterns to merge');
+ }
+
+ for (i = 0; i < patterns.length; ++i) {
+ pattern = patterns[i];
+
+ if (XRegExp.isRegExp(pattern)) {
+ numPriorCaptures = numCaptures;
+ captureNames = pattern[REGEX_DATA] && pattern[REGEX_DATA].captureNames || [];
+
+ // Rewrite backreferences. Passing to XRegExp dies on octals and ensures patterns
+ // are independently valid; helps keep this simple. Named captures are put back
+ output.push(nativ.replace.call(XRegExp(pattern.source).source, parts, rewrite));
+ } else {
+ output.push(XRegExp.escape(pattern));
+ }
+ }
+
+ return XRegExp(output.join('|'), flags);
+ };
+
+ /* ==============================
+ * Fixed/extended native methods
+ * ============================== */
+
+ /**
+ * Adds named capture support (with backreferences returned as `result.name`), and fixes browser
+ * bugs in the native `RegExp.prototype.exec`. Calling `XRegExp.install('natives')` uses this to
+ * override the native method. Use via `XRegExp.exec` without overriding natives.
+ *
+ * @private
+ * @param {String} str String to search.
+ * @returns {Array} Match array with named backreference properties, or `null`.
+ */
+ fixed.exec = function (str) {
+ var origLastIndex = this.lastIndex,
+ match = nativ.exec.apply(this, arguments),
+ name,
+ r2,
+ i;
+
+ if (match) {
+ // Fix browsers whose `exec` methods don't return `undefined` for nonparticipating
+ // capturing groups. This fixes IE 5.5-8, but not IE 9's quirks mode or emulation of
+ // older IEs. IE 9 in standards mode follows the spec
+ if (!correctExecNpcg && match.length > 1 && indexOf(match, '') > -1) {
+ r2 = copyRegex(this, {
+ removeG: true,
+ isInternalOnly: true
+ });
+ // Using `str.slice(match.index)` rather than `match[0]` in case lookahead allowed
+ // matching due to characters outside the match
+ nativ.replace.call(String(str).slice(match.index), r2, function () {
+ var len = arguments.length,
+ i;
+ // Skip index 0 and the last 2
+ for (i = 1; i < len - 2; ++i) {
+ if (arguments[i] === undefined) {
+ match[i] = undefined;
+ }
+ }
+ });
+ }
+
+ // Attach named capture properties
+ if (this[REGEX_DATA] && this[REGEX_DATA].captureNames) {
+ // Skip index 0
+ for (i = 1; i < match.length; ++i) {
+ name = this[REGEX_DATA].captureNames[i - 1];
+ if (name) {
+ match[name] = match[i];
+ }
+ }
+ }
+
+ // Fix browsers that increment `lastIndex` after zero-length matches
+ if (this.global && !match[0].length && this.lastIndex > match.index) {
+ this.lastIndex = match.index;
+ }
+ }
+
+ if (!this.global) {
+ // Fixes IE, Opera bug (last tested IE 9, Opera 11.6)
+ this.lastIndex = origLastIndex;
+ }
+
+ return match;
+ };
+
+ /**
+ * Fixes browser bugs in the native `RegExp.prototype.test`. Calling `XRegExp.install('natives')`
+ * uses this to override the native method.
+ *
+ * @private
+ * @param {String} str String to search.
+ * @returns {Boolean} Whether the regex matched the provided value.
+ */
+ fixed.test = function (str) {
+ // Do this the easy way :-)
+ return !!fixed.exec.call(this, str);
+ };
+
+ /**
+ * Adds named capture support (with backreferences returned as `result.name`), and fixes browser
+ * bugs in the native `String.prototype.match`. Calling `XRegExp.install('natives')` uses this to
+ * override the native method.
+ *
+ * @private
+ * @param {RegExp|*} regex Regex to search with. If not a regex object, it is passed to `RegExp`.
+ * @returns {Array} If `regex` uses flag g, an array of match strings or `null`. Without flag g,
+ * the result of calling `regex.exec(this)`.
+ */
+ fixed.match = function (regex) {
+ var result;
+
+ if (!XRegExp.isRegExp(regex)) {
+ // Use the native `RegExp` rather than `XRegExp`
+ regex = new RegExp(regex);
+ } else if (regex.global) {
+ result = nativ.match.apply(this, arguments);
+ // Fixes IE bug
+ regex.lastIndex = 0;
+
+ return result;
+ }
+
+ return fixed.exec.call(regex, toObject(this));
+ };
+
+ /**
+ * Adds support for `${n}` tokens for named and numbered backreferences in replacement text, and
+ * provides named backreferences to replacement functions as `arguments[0].name`. Also fixes browser
+ * bugs in replacement text syntax when performing a replacement using a nonregex search value, and
+ * the value of a replacement regex's `lastIndex` property during replacement iterations and upon
+ * completion. Calling `XRegExp.install('natives')` uses this to override the native method. Note
+ * that this doesn't support SpiderMonkey's proprietary third (`flags`) argument. Use via
+ * `XRegExp.replace` without overriding natives.
+ *
+ * @private
+ * @param {RegExp|String} search Search pattern to be replaced.
+ * @param {String|Function} replacement Replacement string or a function invoked to create it.
+ * @returns {String} New string with one or all matches replaced.
+ */
+ fixed.replace = function (search, replacement) {
+ var isRegex = XRegExp.isRegExp(search),
+ origLastIndex,
+ captureNames,
+ result;
+
+ if (isRegex) {
+ if (search[REGEX_DATA]) {
+ captureNames = search[REGEX_DATA].captureNames;
+ }
+ // Only needed if `search` is nonglobal
+ origLastIndex = search.lastIndex;
+ } else {
+ search += ''; // Type-convert
+ }
+
+ // Don't use `typeof`; some older browsers return 'function' for regex objects
+ if (isType(replacement, 'Function')) {
+ // Stringifying `this` fixes a bug in IE < 9 where the last argument in replacement
+ // functions isn't type-converted to a string
+ result = nativ.replace.call(String(this), search, function () {
+ var args = arguments,
+ i;
+ if (captureNames) {
+ // Change the `arguments[0]` string primitive to a `String` object that can
+ // store properties. This really does need to use `String` as a constructor
+ args[0] = new String(args[0]);
+ // Store named backreferences on the first argument
+ for (i = 0; i < captureNames.length; ++i) {
+ if (captureNames[i]) {
+ args[0][captureNames[i]] = args[i + 1];
+ }
+ }
+ }
+ // Update `lastIndex` before calling `replacement`. Fixes IE, Chrome, Firefox,
+ // Safari bug (last tested IE 9, Chrome 17, Firefox 11, Safari 5.1)
+ if (isRegex && search.global) {
+ search.lastIndex = args[args.length - 2] + args[0].length;
+ }
+ // ES6 specs the context for replacement functions as `undefined`
+ return replacement.apply(undefined, args);
+ });
+ } else {
+ // Ensure that the last value of `args` will be a string when given nonstring `this`,
+ // while still throwing on null or undefined context
+ result = nativ.replace.call(this == null ? this : String(this), search, function () {
+ // Keep this function's `arguments` available through closure
+ var args = arguments;
+ return nativ.replace.call(String(replacement), replacementToken, function ($0, $1, $2) {
+ var n;
+ // Named or numbered backreference with curly braces
+ if ($1) {
+ // XRegExp behavior for `${n}`:
+ // 1. Backreference to numbered capture, if `n` is an integer. Use `0` for
+ // for the entire match. Any number of leading zeros may be used.
+ // 2. Backreference to named capture `n`, if it exists and is not an
+ // integer overridden by numbered capture. In practice, this does not
+ // overlap with numbered capture since XRegExp does not allow named
+ // capture to use a bare integer as the name.
+ // 3. If the name or number does not refer to an existing capturing group,
+ // it's an error.
+ n = +$1; // Type-convert; drop leading zeros
+ if (n <= args.length - 3) {
+ return args[n] || '';
+ }
+ // Groups with the same name is an error, else would need `lastIndexOf`
+ n = captureNames ? indexOf(captureNames, $1) : -1;
+ if (n < 0) {
+ throw new SyntaxError('Backreference to undefined group ' + $0);
+ }
+ return args[n + 1] || '';
+ }
+ // Else, special variable or numbered backreference without curly braces
+ if ($2 === '$') {
+ // $$
+ return '$';
+ }
+ if ($2 === '&' || +$2 === 0) {
+ // $&, $0 (not followed by 1-9), $00
+ return args[0];
+ }
+ if ($2 === '`') {
+ // $` (left context)
+ return args[args.length - 1].slice(0, args[args.length - 2]);
+ }
+ if ($2 === "'") {
+ // $' (right context)
+ return args[args.length - 1].slice(args[args.length - 2] + args[0].length);
+ }
+ // Else, numbered backreference without curly braces
+ $2 = +$2; // Type-convert; drop leading zero
+ // XRegExp behavior for `$n` and `$nn`:
+ // - Backrefs end after 1 or 2 digits. Use `${..}` for more digits.
+ // - `$1` is an error if no capturing groups.
+ // - `$10` is an error if less than 10 capturing groups. Use `${1}0` instead.
+ // - `$01` is `$1` if at least one capturing group, else it's an error.
+ // - `$0` (not followed by 1-9) and `$00` are the entire match.
+ // Native behavior, for comparison:
+ // - Backrefs end after 1 or 2 digits. Cannot reference capturing group 100+.
+ // - `$1` is a literal `$1` if no capturing groups.
+ // - `$10` is `$1` followed by a literal `0` if less than 10 capturing groups.
+ // - `$01` is `$1` if at least one capturing group, else it's a literal `$01`.
+ // - `$0` is a literal `$0`.
+ if (!isNaN($2)) {
+ if ($2 > args.length - 3) {
+ throw new SyntaxError('Backreference to undefined group ' + $0);
+ }
+ return args[$2] || '';
+ }
+ // `$` followed by an unsupported char is an error, unlike native JS
+ throw new SyntaxError('Invalid token ' + $0);
+ });
+ });
+ }
+
+ if (isRegex) {
+ if (search.global) {
+ // Fixes IE, Safari bug (last tested IE 9, Safari 5.1)
+ search.lastIndex = 0;
+ } else {
+ // Fixes IE, Opera bug (last tested IE 9, Opera 11.6)
+ search.lastIndex = origLastIndex;
+ }
+ }
+
+ return result;
+ };
+
+ /**
+ * Fixes browser bugs in the native `String.prototype.split`. Calling `XRegExp.install('natives')`
+ * uses this to override the native method. Use via `XRegExp.split` without overriding natives.
+ *
+ * @private
+ * @param {RegExp|String} separator Regex or string to use for separating the string.
+ * @param {Number} [limit] Maximum number of items to include in the result array.
+ * @returns {Array} Array of substrings.
+ */
+ fixed.split = function (separator, limit) {
+ if (!XRegExp.isRegExp(separator)) {
+ // Browsers handle nonregex split correctly, so use the faster native method
+ return nativ.split.apply(this, arguments);
+ }
+
+ var str = String(this),
+ output = [],
+ origLastIndex = separator.lastIndex,
+ lastLastIndex = 0,
+ lastLength;
+
+ // Values for `limit`, per the spec:
+ // If undefined: pow(2,32) - 1
+ // If 0, Infinity, or NaN: 0
+ // If positive number: limit = floor(limit); if (limit >= pow(2,32)) limit -= pow(2,32);
+ // If negative number: pow(2,32) - floor(abs(limit))
+ // If other: Type-convert, then use the above rules
+ // This line fails in very strange ways for some values of `limit` in Opera 10.5-10.63,
+ // unless Opera Dragonfly is open (go figure). It works in at least Opera 9.5-10.1 and 11+
+ limit = (limit === undefined ? -1 : limit) >>> 0;
+
+ XRegExp.forEach(str, separator, function (match) {
+ // This condition is not the same as `if (match[0].length)`
+ if (match.index + match[0].length > lastLastIndex) {
+ output.push(str.slice(lastLastIndex, match.index));
+ if (match.length > 1 && match.index < str.length) {
+ Array.prototype.push.apply(output, match.slice(1));
+ }
+ lastLength = match[0].length;
+ lastLastIndex = match.index + lastLength;
+ }
+ });
+
+ if (lastLastIndex === str.length) {
+ if (!nativ.test.call(separator, '') || lastLength) {
+ output.push('');
+ }
+ } else {
+ output.push(str.slice(lastLastIndex));
+ }
+
+ separator.lastIndex = origLastIndex;
+ return output.length > limit ? output.slice(0, limit) : output;
+ };
+
+ /* ==============================
+ * Built-in syntax/flag tokens
+ * ============================== */
+
+ /*
+ * Letter escapes that natively match literal characters: `\a`, `\A`, etc. These should be
+ * SyntaxErrors but are allowed in web reality. XRegExp makes them errors for cross-browser
+ * consistency and to reserve their syntax, but lets them be superseded by addons.
+ */
+ XRegExp.addToken(/\\([ABCE-RTUVXYZaeg-mopqyz]|c(?![A-Za-z])|u(?![\dA-Fa-f]{4}|{[\dA-Fa-f]+})|x(?![\dA-Fa-f]{2}))/, function (match, scope) {
+ // \B is allowed in default scope only
+ if (match[1] === 'B' && scope === defaultScope) {
+ return match[0];
+ }
+ throw new SyntaxError('Invalid escape ' + match[0]);
+ }, {
+ scope: 'all',
+ leadChar: '\\'
+ });
+
+ /*
+ * Unicode code point escape with curly braces: `\u{N..}`. `N..` is any one or more digit
+ * hexadecimal number from 0-10FFFF, and can include leading zeros. Requires the native ES6 `u` flag
+ * to support code points greater than U+FFFF. Avoids converting code points above U+FFFF to
+ * surrogate pairs (which could be done without flag `u`), since that could lead to broken behavior
+ * if you follow a `\u{N..}` token that references a code point above U+FFFF with a quantifier, or
+ * if you use the same in a character class.
+ */
+ XRegExp.addToken(/\\u{([\dA-Fa-f]+)}/, function (match, scope, flags) {
+ var code = dec(match[1]);
+ if (code > 0x10FFFF) {
+ throw new SyntaxError('Invalid Unicode code point ' + match[0]);
+ }
+ if (code <= 0xFFFF) {
+ // Converting to \uNNNN avoids needing to escape the literal character and keep it
+ // separate from preceding tokens
+ return '\\u' + pad4(hex(code));
+ }
+ // If `code` is between 0xFFFF and 0x10FFFF, require and defer to native handling
+ if (hasNativeU && flags.indexOf('u') > -1) {
+ return match[0];
+ }
+ throw new SyntaxError('Cannot use Unicode code point above \\u{FFFF} without flag u');
+ }, {
+ scope: 'all',
+ leadChar: '\\'
+ });
+
+ /*
+ * Empty character class: `[]` or `[^]`. This fixes a critical cross-browser syntax inconsistency.
+ * Unless this is standardized (per the ES spec), regex syntax can't be accurately parsed because
+ * character class endings can't be determined.
+ */
+ XRegExp.addToken(/\[(\^?)]/, function (match) {
+ // For cross-browser compatibility with ES3, convert [] to \b\B and [^] to [\s\S].
+ // (?!) should work like \b\B, but is unreliable in some versions of Firefox
+ return match[1] ? '[\\s\\S]' : '\\b\\B';
+ }, { leadChar: '[' });
+
+ /*
+ * Comment pattern: `(?# )`. Inline comments are an alternative to the line comments allowed in
+ * free-spacing mode (flag x).
+ */
+ XRegExp.addToken(/\(\?#[^)]*\)/, function (match, scope, flags) {
+ // Keep tokens separated unless the following token is a quantifier
+ return isQuantifierNext(match.input, match.index + match[0].length, flags) ? '' : '(?:)';
+ }, { leadChar: '(' });
+
+ /*
+ * Whitespace and line comments, in free-spacing mode (aka extended mode, flag x) only.
+ */
+ XRegExp.addToken(/\s+|#.*/, function (match, scope, flags) {
+ // Keep tokens separated unless the following token is a quantifier
+ return isQuantifierNext(match.input, match.index + match[0].length, flags) ? '' : '(?:)';
+ }, { flag: 'x' });
+
+ /*
+ * Dot, in dotall mode (aka singleline mode, flag s) only.
+ */
+ XRegExp.addToken(/\./, function () {
+ return '[\\s\\S]';
+ }, {
+ flag: 's',
+ leadChar: '.'
+ });
+
+ /*
+ * Named backreference: `\k<name>`. Backreference names can use the characters A-Z, a-z, 0-9, _,
+ * and $ only. Also allows numbered backreferences as `\k<n>`.
+ */
+ XRegExp.addToken(/\\k<([\w$]+)>/, function (match) {
+ // Groups with the same name is an error, else would need `lastIndexOf`
+ var index = isNaN(match[1]) ? indexOf(this.captureNames, match[1]) + 1 : +match[1],
+ endIndex = match.index + match[0].length;
+ if (!index || index > this.captureNames.length) {
+ throw new SyntaxError('Backreference to undefined group ' + match[0]);
+ }
+ // Keep backreferences separate from subsequent literal numbers
+ return '\\' + index + (endIndex === match.input.length || isNaN(match.input.charAt(endIndex)) ? '' : '(?:)');
+ }, { leadChar: '\\' });
+
+ /*
+ * Numbered backreference or octal, plus any following digits: `\0`, `\11`, etc. Octals except `\0`
+ * not followed by 0-9 and backreferences to unopened capture groups throw an error. Other matches
+ * are returned unaltered. IE < 9 doesn't support backreferences above `\99` in regex syntax.
+ */
+ XRegExp.addToken(/\\(\d+)/, function (match, scope) {
+ if (!(scope === defaultScope && /^[1-9]/.test(match[1]) && +match[1] <= this.captureNames.length) && match[1] !== '0') {
+ throw new SyntaxError('Cannot use octal escape or backreference to undefined group ' + match[0]);
+ }
+ return match[0];
+ }, {
+ scope: 'all',
+ leadChar: '\\'
+ });
+
+ /*
+ * Named capturing group; match the opening delimiter only: `(?<name>`. Capture names can use the
+ * characters A-Z, a-z, 0-9, _, and $ only. Names can't be integers. Supports Python-style
+ * `(?P<name>` as an alternate syntax to avoid issues in some older versions of Opera which natively
+ * supported the Python-style syntax. Otherwise, XRegExp might treat numbered backreferences to
+ * Python-style named capture as octals.
+ */
+ XRegExp.addToken(/\(\?P?<([\w$]+)>/, function (match) {
+ // Disallow bare integers as names because named backreferences are added to match
+ // arrays and therefore numeric properties may lead to incorrect lookups
+ if (!isNaN(match[1])) {
+ throw new SyntaxError('Cannot use integer as capture name ' + match[0]);
+ }
+ if (match[1] === 'length' || match[1] === '__proto__') {
+ throw new SyntaxError('Cannot use reserved word as capture name ' + match[0]);
+ }
+ if (indexOf(this.captureNames, match[1]) > -1) {
+ throw new SyntaxError('Cannot use same name for multiple groups ' + match[0]);
+ }
+ this.captureNames.push(match[1]);
+ this.hasNamedCapture = true;
+ return '(';
+ }, { leadChar: '(' });
+
+ /*
+ * Capturing group; match the opening parenthesis only. Required for support of named capturing
+ * groups. Also adds explicit capture mode (flag n).
+ */
+ XRegExp.addToken(/\((?!\?)/, function (match, scope, flags) {
+ if (flags.indexOf('n') > -1) {
+ return '(?:';
+ }
+ this.captureNames.push(null);
+ return '(';
+ }, {
+ optionalFlags: 'n',
+ leadChar: '('
+ });
+
+ /* ==============================
+ * Expose XRegExp
+ * ============================== */
+
+ module.exports = XRegExp;
+
+/***/ }),
+/* 5 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ 'use strict';
+
+ Object.defineProperty(exports, "__esModule", {
+ value: true
+ });
+
+ var _match = __webpack_require__(6);
+
+ Object.keys(_match).forEach(function (key) {
+ if (key === "default" || key === "__esModule") return;
+ Object.defineProperty(exports, key, {
+ enumerable: true,
+ get: function get() {
+ return _match[key];
+ }
+ });
+ });
+
+ var _applyRegexList = __webpack_require__(7);
+
+ Object.keys(_applyRegexList).forEach(function (key) {
+ if (key === "default" || key === "__esModule") return;
+ Object.defineProperty(exports, key, {
+ enumerable: true,
+ get: function get() {
+ return _applyRegexList[key];
+ }
+ });
+ });
+
+/***/ }),
+/* 6 */
+/***/ (function(module, exports) {
+
+ "use strict";
+
+ Object.defineProperty(exports, "__esModule", {
+ value: true
+ });
+
+ var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
+
+ function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+ var Match = exports.Match = function () {
+ function Match(value, index, css) {
+ _classCallCheck(this, Match);
+
+ this.value = value;
+ this.index = index;
+ this.length = value.length;
+ this.css = css;
+ this.brushName = null;
+ }
+
+ _createClass(Match, [{
+ key: "toString",
+ value: function toString() {
+ return this.value;
+ }
+ }]);
+
+ return Match;
+ }();
+
+/***/ }),
+/* 7 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ 'use strict';
+
+ Object.defineProperty(exports, "__esModule", {
+ value: true
+ });
+
+ var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+ exports.applyRegexList = applyRegexList;
+
+ var _matches = __webpack_require__(8);
+
+ /**
+ * Applies all regular expression to the code and sto
<TRUNCATED>