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Angular - the compiler library

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/** * @license * Copyright Google Inc. All Rights Reserved. * * Use of this source code is governed by an MIT-style license that can be * found in the LICENSE file at https://angular.io/license */ import { getHtmlTagDefinition } from './ml_parser/html_tags'; var _SELECTOR_REGEXP = new RegExp('(\\:not\\()|' + //":not(" '([-\\w]+)|' + // "tag" '(?:\\.([-\\w]+))|' + // ".class" // "-" should appear first in the regexp below as FF31 parses "[.-\w]" as a range '(?:\\[([-.\\w*]+)(?:=([\"\']?)([^\\]\"\']*)\\5)?\\])|' + // "[name]", "[name=value]", // "[name="value"]", // "[name='value']" '(\\))|' + // ")" '(\\s*,\\s*)', // "," 'g'); /** * A css selector contains an element name, * css classes and attribute/value pairs with the purpose * of selecting subsets out of them. */ var CssSelector = /** @class */ (function () { function CssSelector() { this.element = null; this.classNames = []; /** * The selectors are encoded in pairs where: * - even locations are attribute names * - odd locations are attribute values. * * Example: * Selector: `[key1=value1][key2]` would parse to: * ``` * ['key1', 'value1', 'key2', ''] * ``` */ this.attrs = []; this.notSelectors = []; } CssSelector.parse = function (selector) { var results = []; var _addResult = function (res, cssSel) { if (cssSel.notSelectors.length > 0 && !cssSel.element && cssSel.classNames.length == 0 && cssSel.attrs.length == 0) { cssSel.element = '*'; } res.push(cssSel); }; var cssSelector = new CssSelector(); var match; var current = cssSelector; var inNot = false; _SELECTOR_REGEXP.lastIndex = 0; while (match = _SELECTOR_REGEXP.exec(selector)) { if (match[1]) { if (inNot) { throw new Error('Nesting :not is not allowed in a selector'); } inNot = true; current = new CssSelector(); cssSelector.notSelectors.push(current); } if (match[2]) { current.setElement(match[2]); } if (match[3]) { current.addClassName(match[3]); } if (match[4]) { current.addAttribute(match[4], match[6]); } if (match[7]) { inNot = false; current = cssSelector; } if (match[8]) { if (inNot) { throw new Error('Multiple selectors in :not are not supported'); } _addResult(results, cssSelector); cssSelector = current = new CssSelector(); } } _addResult(results, cssSelector); return results; }; CssSelector.prototype.isElementSelector = function () { return this.hasElementSelector() && this.classNames.length == 0 && this.attrs.length == 0 && this.notSelectors.length === 0; }; CssSelector.prototype.hasElementSelector = function () { return !!this.element; }; CssSelector.prototype.setElement = function (element) { if (element === void 0) { element = null; } this.element = element; }; /** Gets a template string for an element that matches the selector. */ CssSelector.prototype.getMatchingElementTemplate = function () { var tagName = this.element || 'div'; var classAttr = this.classNames.length > 0 ? " class=\"" + this.classNames.join(' ') + "\"" : ''; var attrs = ''; for (var i = 0; i < this.attrs.length; i += 2) { var attrName = this.attrs[i]; var attrValue = this.attrs[i + 1] !== '' ? "=\"" + this.attrs[i + 1] + "\"" : ''; attrs += " " + attrName + attrValue; } return getHtmlTagDefinition(tagName).isVoid ? "<" + tagName + classAttr + attrs + "/>" : "<" + tagName + classAttr + attrs + "></" + tagName + ">"; }; CssSelector.prototype.getAttrs = function () { var result = []; if (this.classNames.length > 0) { result.push('class', this.classNames.join(' ')); } return result.concat(this.attrs); }; CssSelector.prototype.addAttribute = function (name, value) { if (value === void 0) { value = ''; } this.attrs.push(name, value && value.toLowerCase() || ''); }; CssSelector.prototype.addClassName = function (name) { this.classNames.push(name.toLowerCase()); }; CssSelector.prototype.toString = function () { var res = this.element || ''; if (this.classNames) { this.classNames.forEach(function (klass) { return res += "." + klass; }); } if (this.attrs) { for (var i = 0; i < this.attrs.length; i += 2) { var name_1 = this.attrs[i]; var value = this.attrs[i + 1]; res += "[" + name_1 + (value ? '=' + value : '') + "]"; } } this.notSelectors.forEach(function (notSelector) { return res += ":not(" + notSelector + ")"; }); return res; }; return CssSelector; }()); export { CssSelector }; /** * Reads a list of CssSelectors and allows to calculate which ones * are contained in a given CssSelector. */ var SelectorMatcher = /** @class */ (function () { function SelectorMatcher() { this._elementMap = new Map(); this._elementPartialMap = new Map(); this._classMap = new Map(); this._classPartialMap = new Map(); this._attrValueMap = new Map(); this._attrValuePartialMap = new Map(); this._listContexts = []; } SelectorMatcher.createNotMatcher = function (notSelectors) { var notMatcher = new SelectorMatcher(); notMatcher.addSelectables(notSelectors, null); return notMatcher; }; SelectorMatcher.prototype.addSelectables = function (cssSelectors, callbackCtxt) { var listContext = null; if (cssSelectors.length > 1) { listContext = new SelectorListContext(cssSelectors); this._listContexts.push(listContext); } for (var i = 0; i < cssSelectors.length; i++) { this._addSelectable(cssSelectors[i], callbackCtxt, listContext); } }; /** * Add an object that can be found later on by calling `match`. * @param cssSelector A css selector * @param callbackCtxt An opaque object that will be given to the callback of the `match` function */ SelectorMatcher.prototype._addSelectable = function (cssSelector, callbackCtxt, listContext) { var matcher = this; var element = cssSelector.element; var classNames = cssSelector.classNames; var attrs = cssSelector.attrs; var selectable = new SelectorContext(cssSelector, callbackCtxt, listContext); if (element) { var isTerminal = attrs.length === 0 && classNames.length === 0; if (isTerminal) { this._addTerminal(matcher._elementMap, element, selectable); } else { matcher = this._addPartial(matcher._elementPartialMap, element); } } if (classNames) { for (var i = 0; i < classNames.length; i++) { var isTerminal = attrs.length === 0 && i === classNames.length - 1; var className = classNames[i]; if (isTerminal) { this._addTerminal(matcher._classMap, className, selectable); } else { matcher = this._addPartial(matcher._classPartialMap, className); } } } if (attrs) { for (var i = 0; i < attrs.length; i += 2) { var isTerminal = i === attrs.length - 2; var name_2 = attrs[i]; var value = attrs[i + 1]; if (isTerminal) { var terminalMap = matcher._attrValueMap; var terminalValuesMap = terminalMap.get(name_2); if (!terminalValuesMap) { terminalValuesMap = new Map(); terminalMap.set(name_2, terminalValuesMap); } this._addTerminal(terminalValuesMap, value, selectable); } else { var partialMap = matcher._attrValuePartialMap; var partialValuesMap = partialMap.get(name_2); if (!partialValuesMap) { partialValuesMap = new Map(); partialMap.set(name_2, partialValuesMap); } matcher = this._addPartial(partialValuesMap, value); } } } }; SelectorMatcher.prototype._addTerminal = function (map, name, selectable) { var terminalList = map.get(name); if (!terminalList) { terminalList = []; map.set(name, terminalList); } terminalList.push(selectable); }; SelectorMatcher.prototype._addPartial = function (map, name) { var matcher = map.get(name); if (!matcher) { matcher = new SelectorMatcher(); map.set(name, matcher); } return matcher; }; /** * Find the objects that have been added via `addSelectable` * whose css selector is contained in the given css selector. * @param cssSelector A css selector * @param matchedCallback This callback will be called with the object handed into `addSelectable` * @return boolean true if a match was found */ SelectorMatcher.prototype.match = function (cssSelector, matchedCallback) { var result = false; var element = cssSelector.element; var classNames = cssSelector.classNames; var attrs = cssSelector.attrs; for (var i = 0; i < this._listContexts.length; i++) { this._listContexts[i].alreadyMatched = false; } result = this._matchTerminal(this._elementMap, element, cssSelector, matchedCallback) || result; result = this._matchPartial(this._elementPartialMap, element, cssSelector, matchedCallback) || result; if (classNames) { for (var i = 0; i < classNames.length; i++) { var className = classNames[i]; result = this._matchTerminal(this._classMap, className, cssSelector, matchedCallback) || result; result = this._matchPartial(this._classPartialMap, className, cssSelector, matchedCallback) || result; } } if (attrs) { for (var i = 0; i < attrs.length; i += 2) { var name_3 = attrs[i]; var value = attrs[i + 1]; var terminalValuesMap = this._attrValueMap.get(name_3); if (value) { result = this._matchTerminal(terminalValuesMap, '', cssSelector, matchedCallback) || result; } result = this._matchTerminal(terminalValuesMap, value, cssSelector, matchedCallback) || result; var partialValuesMap = this._attrValuePartialMap.get(name_3); if (value) { result = this._matchPartial(partialValuesMap, '', cssSelector, matchedCallback) || result; } result = this._matchPartial(partialValuesMap, value, cssSelector, matchedCallback) || result; } } return result; }; /** @internal */ SelectorMatcher.prototype._matchTerminal = function (map, name, cssSelector, matchedCallback) { if (!map || typeof name !== 'string') { return false; } var selectables = map.get(name) || []; var starSelectables = map.get('*'); if (starSelectables) { selectables = selectables.concat(starSelectables); } if (selectables.length === 0) { return false; } var selectable; var result = false; for (var i = 0; i < selectables.length; i++) { selectable = selectables[i]; result = selectable.finalize(cssSelector, matchedCallback) || result; } return result; }; /** @internal */ SelectorMatcher.prototype._matchPartial = function (map, name, cssSelector, matchedCallback) { if (!map || typeof name !== 'string') { return false; } var nestedSelector = map.get(name); if (!nestedSelector) { return false; } // TODO(perf): get rid of recursion and measure again // TODO(perf): don't pass the whole selector into the recursion, // but only the not processed parts return nestedSelector.match(cssSelector, matchedCallback); }; return SelectorMatcher; }()); export { SelectorMatcher }; var SelectorListContext = /** @class */ (function () { function SelectorListContext(selectors) { this.selectors = selectors; this.alreadyMatched = false; } return SelectorListContext; }()); export { SelectorListContext }; // Store context to pass back selector and context when a selector is matched var SelectorContext = /** @class */ (function () { function SelectorContext(selector, cbContext, listContext) { this.selector = selector; this.cbContext = cbContext; this.listContext = listContext; this.notSelectors = selector.notSelectors; } SelectorContext.prototype.finalize = function (cssSelector, callback) { var result = true; if (this.notSelectors.length > 0 && (!this.listContext || !this.listContext.alreadyMatched)) { var notMatcher = SelectorMatcher.createNotMatcher(this.notSelectors); result = !notMatcher.match(cssSelector, null); } if (result && callback && (!this.listContext || !this.listContext.alreadyMatched)) { if (this.listContext) { this.listContext.alreadyMatched = true; } callback(this.selector, this.cbContext); } return result; }; return SelectorContext; }()); export { SelectorContext }; //# 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* @license\n * Copyright Google Inc. All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {getHtmlTagDefinition} from './ml_parser/html_tags';\n\nconst _SELECTOR_REGEXP = new RegExp(\n    '(\\\\:not\\\\()|' +           //\":not(\"\n        '([-\\\\w]+)|' +         // \"tag\"\n        '(?:\\\\.([-\\\\w]+))|' +  // \".class\"\n        // \"-\" should appear first in the regexp below as FF31 parses \"[.-\\w]\" as a range\n        '(?:\\\\[([-.\\\\w*]+)(?:=([\\\"\\']?)([^\\\\]\\\"\\']*)\\\\5)?\\\\])|' +  // \"[name]\", \"[name=value]\",\n                                                                   // \"[name=\"value\"]\",\n                                                                   // \"[name='value']\"\n        '(\\\\))|' +                                                 // \")\"\n        '(\\\\s*,\\\\s*)',                                             // \",\"\n    'g');\n\n/**\n * A css selector contains an element name,\n * css classes and attribute/value pairs with the purpose\n * of selecting subsets out of them.\n */\nexport class CssSelector {\n  element: string|null = null;\n  classNames: string[] = [];\n  /**\n   * The selectors are encoded in pairs where:\n   * - even locations are attribute names\n   * - odd locations are attribute values.\n   *\n   * Example:\n   * Selector: `[key1=value1][key2]` would parse to:\n   * ```\n   * ['key1', 'value1', 'key2', '']\n   * ```\n   */\n  attrs: string[] = [];\n  notSelectors: CssSelector[] = [];\n\n  static parse(selector: string): CssSelector[] {\n    const results: CssSelector[] = [];\n    const _addResult = (res: CssSelector[], cssSel: CssSelector) => {\n      if (cssSel.notSelectors.length > 0 && !cssSel.element && cssSel.classNames.length == 0 &&\n          cssSel.attrs.length == 0) {\n        cssSel.element = '*';\n      }\n      res.push(cssSel);\n    };\n    let cssSelector = new CssSelector();\n    let match: string[]|null;\n    let current = cssSelector;\n    let inNot = false;\n    _SELECTOR_REGEXP.lastIndex = 0;\n    while (match = _SELECTOR_REGEXP.exec(selector)) {\n      if (match[1]) {\n        if (inNot) {\n          throw new Error('Nesting :not is not allowed in a selector');\n        }\n        inNot = true;\n        current = new CssSelector();\n        cssSelector.notSelectors.push(current);\n      }\n      if (match[2]) {\n        current.setElement(match[2]);\n      }\n      if (match[3]) {\n        current.addClassName(match[3]);\n      }\n      if (match[4]) {\n        current.addAttribute(match[4], match[6]);\n      }\n      if (match[7]) {\n        inNot = false;\n        current = cssSelector;\n      }\n      if (match[8]) {\n        if (inNot) {\n          throw new Error('Multiple selectors in :not are not supported');\n        }\n        _addResult(results, cssSelector);\n        cssSelector = current = new CssSelector();\n      }\n    }\n    _addResult(results, cssSelector);\n    return results;\n  }\n\n  isElementSelector(): boolean {\n    return this.hasElementSelector() && this.classNames.length == 0 && this.attrs.length == 0 &&\n        this.notSelectors.length === 0;\n  }\n\n  hasElementSelector(): boolean { return !!this.element; }\n\n  setElement(element: string|null = null) { this.element = element; }\n\n  /** Gets a template string for an element that matches the selector. */\n  getMatchingElementTemplate(): string {\n    const tagName = this.element || 'div';\n    const classAttr = this.classNames.length > 0 ? ` class=\"${this.classNames.join(' ')}\"` : '';\n\n    let attrs = '';\n    for (let i = 0; i < this.attrs.length; i += 2) {\n      const attrName = this.attrs[i];\n      const attrValue = this.attrs[i + 1] !== '' ? `=\"${this.attrs[i + 1]}\"` : '';\n      attrs += ` ${attrName}${attrValue}`;\n    }\n\n    return getHtmlTagDefinition(tagName).isVoid ? `<${tagName}${classAttr}${attrs}/>` :\n                                                  `<${tagName}${classAttr}${attrs}></${tagName}>`;\n  }\n\n  getAttrs(): string[] {\n    const result: string[] = [];\n    if (this.classNames.length > 0) {\n      result.push('class', this.classNames.join(' '));\n    }\n    return result.concat(this.attrs);\n  }\n\n  addAttribute(name: string, value: string = '') {\n    this.attrs.push(name, value && value.toLowerCase() || '');\n  }\n\n  addClassName(name: string) { this.classNames.push(name.toLowerCase()); }\n\n  toString(): string {\n    let res: string = this.element || '';\n    if (this.classNames) {\n      this.classNames.forEach(klass => res += `.${klass}`);\n    }\n    if (this.attrs) {\n      for (let i = 0; i < this.attrs.length; i += 2) {\n        const name = this.attrs[i];\n        const value = this.attrs[i + 1];\n        res += `[${name}${value ? '=' + value : ''}]`;\n      }\n    }\n    this.notSelectors.forEach(notSelector => res += `:not(${notSelector})`);\n    return res;\n  }\n}\n\n/**\n * Reads a list of CssSelectors and allows to calculate which ones\n * are contained in a given CssSelector.\n */\nexport class SelectorMatcher {\n  static createNotMatcher(notSelectors: CssSelector[]): SelectorMatcher {\n    const notMatcher = new SelectorMatcher();\n    notMatcher.addSelectables(notSelectors, null);\n    return notMatcher;\n  }\n\n  private _elementMap = new Map<string, SelectorContext[]>();\n  private _elementPartialMap = new Map<string, SelectorMatcher>();\n  private _classMap = new Map<string, SelectorContext[]>();\n  private _classPartialMap = new Map<string, SelectorMatcher>();\n  private _attrValueMap = new Map<string, Map<string, SelectorContext[]>>();\n  private _attrValuePartialMap = new Map<string, Map<string, SelectorMatcher>>();\n  private _listContexts: SelectorListContext[] = [];\n\n  addSelectables(cssSelectors: CssSelector[], callbackCtxt?: any) {\n    let listContext: SelectorListContext = null !;\n    if (cssSelectors.length > 1) {\n      listContext = new SelectorListContext(cssSelectors);\n      this._listContexts.push(listContext);\n    }\n    for (let i = 0; i < cssSelectors.length; i++) {\n      this._addSelectable(cssSelectors[i], callbackCtxt, listContext);\n    }\n  }\n\n  /**\n   * Add an object that can be found later on by calling `match`.\n   * @param cssSelector A css selector\n   * @param callbackCtxt An opaque object that will be given to the callback of the `match` function\n   */\n  private _addSelectable(\n      cssSelector: CssSelector, callbackCtxt: any, listContext: SelectorListContext) {\n    let matcher: SelectorMatcher = this;\n    const element = cssSelector.element;\n    const classNames = cssSelector.classNames;\n    const attrs = cssSelector.attrs;\n    const selectable = new SelectorContext(cssSelector, callbackCtxt, listContext);\n\n    if (element) {\n      const isTerminal = attrs.length === 0 && classNames.length === 0;\n      if (isTerminal) {\n        this._addTerminal(matcher._elementMap, element, selectable);\n      } else {\n        matcher = this._addPartial(matcher._elementPartialMap, element);\n      }\n    }\n\n    if (classNames) {\n      for (let i = 0; i < classNames.length; i++) {\n        const isTerminal = attrs.length === 0 && i === classNames.length - 1;\n        const className = classNames[i];\n        if (isTerminal) {\n          this._addTerminal(matcher._classMap, className, selectable);\n        } else {\n          matcher = this._addPartial(matcher._classPartialMap, className);\n        }\n      }\n    }\n\n    if (attrs) {\n      for (let i = 0; i < attrs.length; i += 2) {\n        const isTerminal = i === attrs.length - 2;\n        const name = attrs[i];\n        const value = attrs[i + 1];\n        if (isTerminal) {\n          const terminalMap = matcher._attrValueMap;\n          let terminalValuesMap = terminalMap.get(name);\n          if (!terminalValuesMap) {\n            terminalValuesMap = new Map<string, SelectorContext[]>();\n            terminalMap.set(name, terminalValuesMap);\n          }\n          this._addTerminal(terminalValuesMap, value, selectable);\n        } else {\n          const partialMap = matcher._attrValuePartialMap;\n          let partialValuesMap = partialMap.get(name);\n          if (!partialValuesMap) {\n            partialValuesMap = new Map<string, SelectorMatcher>();\n            partialMap.set(name, partialValuesMap);\n          }\n          matcher = this._addPartial(partialValuesMap, value);\n        }\n      }\n    }\n  }\n\n  private _addTerminal(\n      map: Map<string, SelectorContext[]>, name: string, selectable: SelectorContext) {\n    let terminalList = map.get(name);\n    if (!terminalList) {\n      terminalList = [];\n      map.set(name, terminalList);\n    }\n    terminalList.push(selectable);\n  }\n\n  private _addPartial(map: Map<string, SelectorMatcher>, name: string): SelectorMatcher {\n    let matcher = map.get(name);\n    if (!matcher) {\n      matcher = new SelectorMatcher();\n      map.set(name, matcher);\n    }\n    return matcher;\n  }\n\n  /**\n   * Find the objects that have been added via `addSelectable`\n   * whose css selector is contained in the given css selector.\n   * @param cssSelector A css selector\n   * @param matchedCallback This callback will be called with the object handed into `addSelectable`\n   * @return boolean true if a match was found\n  */\n  match(cssSelector: CssSelector, matchedCallback: ((c: CssSelector, a: any) => void)|null):\n      boolean {\n    let result = false;\n    const element = cssSelector.element !;\n    const classNames = cssSelector.classNames;\n    const attrs = cssSelector.attrs;\n\n    for (let i = 0; i < this._listContexts.length; i++) {\n      this._listContexts[i].alreadyMatched = false;\n    }\n\n    result = this._matchTerminal(this._elementMap, element, cssSelector, matchedCallback) || result;\n    result = this._matchPartial(this._elementPartialMap, element, cssSelector, matchedCallback) ||\n        result;\n\n    if (classNames) {\n      for (let i = 0; i < classNames.length; i++) {\n        const className = classNames[i];\n        result =\n            this._matchTerminal(this._classMap, className, cssSelector, matchedCallback) || result;\n        result =\n            this._matchPartial(this._classPartialMap, className, cssSelector, matchedCallback) ||\n            result;\n      }\n    }\n\n    if (attrs) {\n      for (let i = 0; i < attrs.length; i += 2) {\n        const name = attrs[i];\n        const value = attrs[i + 1];\n\n        const terminalValuesMap = this._attrValueMap.get(name) !;\n        if (value) {\n          result =\n              this._matchTerminal(terminalValuesMap, '', cssSelector, matchedCallback) || result;\n        }\n        result =\n            this._matchTerminal(terminalValuesMap, value, cssSelector, matchedCallback) || result;\n\n        const partialValuesMap = this._attrValuePartialMap.get(name) !;\n        if (value) {\n          result = this._matchPartial(partialValuesMap, '', cssSelector, matchedCallback) || result;\n        }\n        result =\n            this._matchPartial(partialValuesMap, value, cssSelector, matchedCallback) || result;\n      }\n    }\n    return result;\n  }\n\n  /** @internal */\n  _matchTerminal(\n      map: Map<string, SelectorContext[]>, name: string, cssSelector: CssSelector,\n      matchedCallback: ((c: CssSelector, a: any) => void)|null): boolean {\n    if (!map || typeof name !== 'string') {\n      return false;\n    }\n\n    let selectables: SelectorContext[] = map.get(name) || [];\n    const starSelectables: SelectorContext[] = map.get('*') !;\n    if (starSelectables) {\n      selectables = selectables.concat(starSelectables);\n    }\n    if (selectables.length === 0) {\n      return false;\n    }\n    let selectable: SelectorContext;\n    let result = false;\n    for (let i = 0; i < selectables.length; i++) {\n      selectable = selectables[i];\n      result = selectable.finalize(cssSelector, matchedCallback) || result;\n    }\n    return result;\n  }\n\n  /** @internal */\n  _matchPartial(\n      map: Map<string, SelectorMatcher>, name: string, cssSelector: CssSelector,\n      matchedCallback: ((c: CssSelector, a: any) => void)|null): boolean {\n    if (!map || typeof name !== 'string') {\n      return false;\n    }\n\n    const nestedSelector = map.get(name);\n    if (!nestedSelector) {\n      return false;\n    }\n    // TODO(perf): get rid of recursion and measure again\n    // TODO(perf): don't pass the whole selector into the recursion,\n    // but only the not processed parts\n    return nestedSelector.match(cssSelector, matchedCallback);\n  }\n}\n\n\nexport class SelectorListContext {\n  alreadyMatched: boolean = false;\n\n  constructor(public selectors: CssSelector[]) {}\n}\n\n// Store context to pass back selector and context when a selector is matched\nexport class SelectorContext {\n  notSelectors: CssSelector[];\n\n  constructor(\n      public selector: CssSelector, public cbContext: any,\n      public listContext: SelectorListContext) {\n    this.notSelectors = selector.notSelectors;\n  }\n\n  finalize(cssSelector: CssSelector, callback: ((c: CssSelector, a: any) => void)|null): boolean {\n    let result = true;\n    if (this.notSelectors.length > 0 && (!this.listContext || !this.listContext.alreadyMatched)) {\n      const notMatcher = SelectorMatcher.createNotMatcher(this.notSelectors);\n      result = !notMatcher.match(cssSelector, null);\n    }\n    if (result && callback && (!this.listContext || !this.listContext.alreadyMatched)) {\n      if (this.listContext) {\n        this.listContext.alreadyMatched = true;\n      }\n      callback(this.selector, this.cbContext);\n    }\n    return result;\n  }\n}\n"]}