| 1 | /**
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| 2 | * @license
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| 3 | * Copyright Google LLC All Rights Reserved.
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| 4 | *
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| 5 | * Use of this source code is governed by an MIT-style license that can be
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| 6 | * found in the LICENSE file at https://angular.io/license
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| 7 | */
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| 8 | import { getHtmlTagDefinition } from './ml_parser/html_tags';
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| 9 | const _SELECTOR_REGEXP = new RegExp('(\\:not\\()|' + // 1: ":not("
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| 10 | '(([\\.\\#]?)[-\\w]+)|' + // 2: "tag"; 3: "."/"#";
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| 11 | // "-" should appear first in the regexp below as FF31 parses "[.-\w]" as a range
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| 12 | // 4: attribute; 5: attribute_string; 6: attribute_value
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| 13 | '(?:\\[([-.\\w*\\\\$]+)(?:=([\"\']?)([^\\]\"\']*)\\5)?\\])|' + // "[name]", "[name=value]",
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| 14 | // "[name="value"]",
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| 15 | // "[name='value']"
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| 16 | '(\\))|' + // 7: ")"
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| 17 | '(\\s*,\\s*)', // 8: ","
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| 18 | 'g');
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| 19 | /**
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| 20 | * A css selector contains an element name,
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| 21 | * css classes and attribute/value pairs with the purpose
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| 22 | * of selecting subsets out of them.
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| 23 | */
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| 24 | export class CssSelector {
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| 25 | constructor() {
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| 26 | this.element = null;
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| 27 | this.classNames = [];
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| 28 | /**
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| 29 | * The selectors are encoded in pairs where:
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| 30 | * - even locations are attribute names
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| 31 | * - odd locations are attribute values.
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| 32 | *
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| 33 | * Example:
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| 34 | * Selector: `[key1=value1][key2]` would parse to:
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| 35 | * ```
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| 36 | * ['key1', 'value1', 'key2', '']
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| 37 | * ```
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| 38 | */
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| 39 | this.attrs = [];
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| 40 | this.notSelectors = [];
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| 41 | }
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| 42 | static parse(selector) {
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| 43 | const results = [];
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| 44 | const _addResult = (res, cssSel) => {
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| 45 | if (cssSel.notSelectors.length > 0 && !cssSel.element && cssSel.classNames.length == 0 &&
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| 46 | cssSel.attrs.length == 0) {
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| 47 | cssSel.element = '*';
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| 48 | }
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| 49 | res.push(cssSel);
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| 50 | };
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| 51 | let cssSelector = new CssSelector();
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| 52 | let match;
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| 53 | let current = cssSelector;
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| 54 | let inNot = false;
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| 55 | _SELECTOR_REGEXP.lastIndex = 0;
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| 56 | while (match = _SELECTOR_REGEXP.exec(selector)) {
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| 57 | if (match[1 /* NOT */]) {
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| 58 | if (inNot) {
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| 59 | throw new Error('Nesting :not in a selector is not allowed');
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| 60 | }
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| 61 | inNot = true;
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| 62 | current = new CssSelector();
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| 63 | cssSelector.notSelectors.push(current);
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| 64 | }
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| 65 | const tag = match[2 /* TAG */];
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| 66 | if (tag) {
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| 67 | const prefix = match[3 /* PREFIX */];
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| 68 | if (prefix === '#') {
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| 69 | // #hash
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| 70 | current.addAttribute('id', tag.substr(1));
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| 71 | }
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| 72 | else if (prefix === '.') {
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| 73 | // Class
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| 74 | current.addClassName(tag.substr(1));
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| 75 | }
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| 76 | else {
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| 77 | // Element
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| 78 | current.setElement(tag);
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| 79 | }
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| 80 | }
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| 81 | const attribute = match[4 /* ATTRIBUTE */];
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| 82 | if (attribute) {
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| 83 | current.addAttribute(current.unescapeAttribute(attribute), match[6 /* ATTRIBUTE_VALUE */]);
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| 84 | }
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| 85 | if (match[7 /* NOT_END */]) {
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| 86 | inNot = false;
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| 87 | current = cssSelector;
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| 88 | }
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| 89 | if (match[8 /* SEPARATOR */]) {
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| 90 | if (inNot) {
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| 91 | throw new Error('Multiple selectors in :not are not supported');
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| 92 | }
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| 93 | _addResult(results, cssSelector);
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| 94 | cssSelector = current = new CssSelector();
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| 95 | }
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| 96 | }
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| 97 | _addResult(results, cssSelector);
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| 98 | return results;
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| 99 | }
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| 100 | /**
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| 101 | * Unescape `\$` sequences from the CSS attribute selector.
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| 102 | *
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| 103 | * This is needed because `$` can have a special meaning in CSS selectors,
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| 104 | * but we might want to match an attribute that contains `$`.
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| 105 | * [MDN web link for more
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| 106 | * info](https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors).
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| 107 | * @param attr the attribute to unescape.
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| 108 | * @returns the unescaped string.
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| 109 | */
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| 110 | unescapeAttribute(attr) {
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| 111 | let result = '';
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| 112 | let escaping = false;
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| 113 | for (let i = 0; i < attr.length; i++) {
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| 114 | const char = attr.charAt(i);
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| 115 | if (char === '\\') {
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| 116 | escaping = true;
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| 117 | continue;
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| 118 | }
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| 119 | if (char === '$' && !escaping) {
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| 120 | throw new Error(`Error in attribute selector "${attr}". ` +
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| 121 | `Unescaped "$" is not supported. Please escape with "\\$".`);
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| 122 | }
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| 123 | escaping = false;
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| 124 | result += char;
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| 125 | }
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| 126 | return result;
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| 127 | }
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| 128 | /**
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| 129 | * Escape `$` sequences from the CSS attribute selector.
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| 130 | *
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| 131 | * This is needed because `$` can have a special meaning in CSS selectors,
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| 132 | * with this method we are escaping `$` with `\$'.
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| 133 | * [MDN web link for more
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| 134 | * info](https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors).
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| 135 | * @param attr the attribute to escape.
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| 136 | * @returns the escaped string.
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| 137 | */
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| 138 | escapeAttribute(attr) {
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| 139 | return attr.replace(/\\/g, '\\\\').replace(/\$/g, '\\$');
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| 140 | }
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| 141 | isElementSelector() {
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| 142 | return this.hasElementSelector() && this.classNames.length == 0 && this.attrs.length == 0 &&
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| 143 | this.notSelectors.length === 0;
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| 144 | }
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| 145 | hasElementSelector() {
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| 146 | return !!this.element;
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| 147 | }
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| 148 | setElement(element = null) {
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| 149 | this.element = element;
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| 150 | }
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| 151 | /** Gets a template string for an element that matches the selector. */
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| 152 | getMatchingElementTemplate() {
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| 153 | const tagName = this.element || 'div';
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| 154 | const classAttr = this.classNames.length > 0 ? ` class="${this.classNames.join(' ')}"` : '';
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| 155 | let attrs = '';
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| 156 | for (let i = 0; i < this.attrs.length; i += 2) {
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| 157 | const attrName = this.attrs[i];
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| 158 | const attrValue = this.attrs[i + 1] !== '' ? `="${this.attrs[i + 1]}"` : '';
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| 159 | attrs += ` ${attrName}${attrValue}`;
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| 160 | }
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| 161 | return getHtmlTagDefinition(tagName).isVoid ? `<${tagName}${classAttr}${attrs}/>` :
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| 162 | `<${tagName}${classAttr}${attrs}></${tagName}>`;
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| 163 | }
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| 164 | getAttrs() {
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| 165 | const result = [];
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| 166 | if (this.classNames.length > 0) {
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| 167 | result.push('class', this.classNames.join(' '));
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| 168 | }
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| 169 | return result.concat(this.attrs);
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| 170 | }
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| 171 | addAttribute(name, value = '') {
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| 172 | this.attrs.push(name, value && value.toLowerCase() || '');
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| 173 | }
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| 174 | addClassName(name) {
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| 175 | this.classNames.push(name.toLowerCase());
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| 176 | }
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| 177 | toString() {
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| 178 | let res = this.element || '';
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| 179 | if (this.classNames) {
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| 180 | this.classNames.forEach(klass => res += `.${klass}`);
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| 181 | }
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| 182 | if (this.attrs) {
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| 183 | for (let i = 0; i < this.attrs.length; i += 2) {
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| 184 | const name = this.escapeAttribute(this.attrs[i]);
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| 185 | const value = this.attrs[i + 1];
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| 186 | res += `[${name}${value ? '=' + value : ''}]`;
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| 187 | }
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| 188 | }
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| 189 | this.notSelectors.forEach(notSelector => res += `:not(${notSelector})`);
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| 190 | return res;
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| 191 | }
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| 192 | }
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| 193 | /**
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| 194 | * Reads a list of CssSelectors and allows to calculate which ones
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| 195 | * are contained in a given CssSelector.
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| 196 | */
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| 197 | export class SelectorMatcher {
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| 198 | constructor() {
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| 199 | this._elementMap = new Map();
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| 200 | this._elementPartialMap = new Map();
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| 201 | this._classMap = new Map();
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| 202 | this._classPartialMap = new Map();
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| 203 | this._attrValueMap = new Map();
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| 204 | this._attrValuePartialMap = new Map();
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| 205 | this._listContexts = [];
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| 206 | }
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| 207 | static createNotMatcher(notSelectors) {
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| 208 | const notMatcher = new SelectorMatcher();
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| 209 | notMatcher.addSelectables(notSelectors, null);
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| 210 | return notMatcher;
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| 211 | }
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| 212 | addSelectables(cssSelectors, callbackCtxt) {
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| 213 | let listContext = null;
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| 214 | if (cssSelectors.length > 1) {
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| 215 | listContext = new SelectorListContext(cssSelectors);
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| 216 | this._listContexts.push(listContext);
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| 217 | }
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| 218 | for (let i = 0; i < cssSelectors.length; i++) {
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| 219 | this._addSelectable(cssSelectors[i], callbackCtxt, listContext);
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| 220 | }
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| 221 | }
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| 222 | /**
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| 223 | * Add an object that can be found later on by calling `match`.
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| 224 | * @param cssSelector A css selector
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| 225 | * @param callbackCtxt An opaque object that will be given to the callback of the `match` function
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| 226 | */
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| 227 | _addSelectable(cssSelector, callbackCtxt, listContext) {
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| 228 | let matcher = this;
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| 229 | const element = cssSelector.element;
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| 230 | const classNames = cssSelector.classNames;
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| 231 | const attrs = cssSelector.attrs;
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| 232 | const selectable = new SelectorContext(cssSelector, callbackCtxt, listContext);
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| 233 | if (element) {
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| 234 | const isTerminal = attrs.length === 0 && classNames.length === 0;
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| 235 | if (isTerminal) {
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| 236 | this._addTerminal(matcher._elementMap, element, selectable);
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| 237 | }
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| 238 | else {
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| 239 | matcher = this._addPartial(matcher._elementPartialMap, element);
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| 240 | }
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| 241 | }
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| 242 | if (classNames) {
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| 243 | for (let i = 0; i < classNames.length; i++) {
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| 244 | const isTerminal = attrs.length === 0 && i === classNames.length - 1;
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| 245 | const className = classNames[i];
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| 246 | if (isTerminal) {
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| 247 | this._addTerminal(matcher._classMap, className, selectable);
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| 248 | }
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| 249 | else {
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| 250 | matcher = this._addPartial(matcher._classPartialMap, className);
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| 251 | }
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| 252 | }
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| 253 | }
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| 254 | if (attrs) {
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| 255 | for (let i = 0; i < attrs.length; i += 2) {
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| 256 | const isTerminal = i === attrs.length - 2;
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| 257 | const name = attrs[i];
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| 258 | const value = attrs[i + 1];
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| 259 | if (isTerminal) {
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| 260 | const terminalMap = matcher._attrValueMap;
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| 261 | let terminalValuesMap = terminalMap.get(name);
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| 262 | if (!terminalValuesMap) {
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| 263 | terminalValuesMap = new Map();
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| 264 | terminalMap.set(name, terminalValuesMap);
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| 265 | }
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| 266 | this._addTerminal(terminalValuesMap, value, selectable);
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| 267 | }
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| 268 | else {
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| 269 | const partialMap = matcher._attrValuePartialMap;
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| 270 | let partialValuesMap = partialMap.get(name);
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| 271 | if (!partialValuesMap) {
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| 272 | partialValuesMap = new Map();
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| 273 | partialMap.set(name, partialValuesMap);
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| 274 | }
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| 275 | matcher = this._addPartial(partialValuesMap, value);
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| 276 | }
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| 277 | }
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| 278 | }
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| 279 | }
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| 280 | _addTerminal(map, name, selectable) {
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| 281 | let terminalList = map.get(name);
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| 282 | if (!terminalList) {
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| 283 | terminalList = [];
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| 284 | map.set(name, terminalList);
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| 285 | }
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| 286 | terminalList.push(selectable);
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| 287 | }
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| 288 | _addPartial(map, name) {
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| 289 | let matcher = map.get(name);
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| 290 | if (!matcher) {
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| 291 | matcher = new SelectorMatcher();
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| 292 | map.set(name, matcher);
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| 293 | }
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| 294 | return matcher;
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| 295 | }
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| 296 | /**
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| 297 | * Find the objects that have been added via `addSelectable`
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| 298 | * whose css selector is contained in the given css selector.
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| 299 | * @param cssSelector A css selector
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| 300 | * @param matchedCallback This callback will be called with the object handed into `addSelectable`
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| 301 | * @return boolean true if a match was found
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| 302 | */
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| 303 | match(cssSelector, matchedCallback) {
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| 304 | let result = false;
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| 305 | const element = cssSelector.element;
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| 306 | const classNames = cssSelector.classNames;
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| 307 | const attrs = cssSelector.attrs;
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| 308 | for (let i = 0; i < this._listContexts.length; i++) {
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| 309 | this._listContexts[i].alreadyMatched = false;
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| 310 | }
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| 311 | result = this._matchTerminal(this._elementMap, element, cssSelector, matchedCallback) || result;
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| 312 | result = this._matchPartial(this._elementPartialMap, element, cssSelector, matchedCallback) ||
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| 313 | result;
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| 314 | if (classNames) {
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| 315 | for (let i = 0; i < classNames.length; i++) {
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| 316 | const className = classNames[i];
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| 317 | result =
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| 318 | this._matchTerminal(this._classMap, className, cssSelector, matchedCallback) || result;
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| 319 | result =
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| 320 | this._matchPartial(this._classPartialMap, className, cssSelector, matchedCallback) ||
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| 321 | result;
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| 322 | }
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| 323 | }
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| 324 | if (attrs) {
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| 325 | for (let i = 0; i < attrs.length; i += 2) {
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| 326 | const name = attrs[i];
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| 327 | const value = attrs[i + 1];
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| 328 | const terminalValuesMap = this._attrValueMap.get(name);
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| 329 | if (value) {
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| 330 | result =
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| 331 | this._matchTerminal(terminalValuesMap, '', cssSelector, matchedCallback) || result;
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| 332 | }
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| 333 | result =
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| 334 | this._matchTerminal(terminalValuesMap, value, cssSelector, matchedCallback) || result;
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| 335 | const partialValuesMap = this._attrValuePartialMap.get(name);
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| 336 | if (value) {
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| 337 | result = this._matchPartial(partialValuesMap, '', cssSelector, matchedCallback) || result;
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| 338 | }
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| 339 | result =
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| 340 | this._matchPartial(partialValuesMap, value, cssSelector, matchedCallback) || result;
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| 341 | }
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| 342 | }
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| 343 | return result;
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| 344 | }
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| 345 | /** @internal */
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| 346 | _matchTerminal(map, name, cssSelector, matchedCallback) {
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| 347 | if (!map || typeof name !== 'string') {
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| 348 | return false;
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| 349 | }
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| 350 | let selectables = map.get(name) || [];
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| 351 | const starSelectables = map.get('*');
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| 352 | if (starSelectables) {
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| 353 | selectables = selectables.concat(starSelectables);
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| 354 | }
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| 355 | if (selectables.length === 0) {
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| 356 | return false;
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| 357 | }
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| 358 | let selectable;
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| 359 | let result = false;
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| 360 | for (let i = 0; i < selectables.length; i++) {
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| 361 | selectable = selectables[i];
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| 362 | result = selectable.finalize(cssSelector, matchedCallback) || result;
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| 363 | }
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| 364 | return result;
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| 365 | }
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| 366 | /** @internal */
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| 367 | _matchPartial(map, name, cssSelector, matchedCallback) {
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| 368 | if (!map || typeof name !== 'string') {
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| 369 | return false;
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| 370 | }
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| 371 | const nestedSelector = map.get(name);
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| 372 | if (!nestedSelector) {
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| 373 | return false;
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| 374 | }
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| 375 | // TODO(perf): get rid of recursion and measure again
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| 376 | // TODO(perf): don't pass the whole selector into the recursion,
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| 377 | // but only the not processed parts
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| 378 | return nestedSelector.match(cssSelector, matchedCallback);
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| 379 | }
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| 380 | }
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| 381 | export class SelectorListContext {
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| 382 | constructor(selectors) {
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| 383 | this.selectors = selectors;
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| 384 | this.alreadyMatched = false;
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| 385 | }
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| 386 | }
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| 387 | // Store context to pass back selector and context when a selector is matched
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| 388 | export class SelectorContext {
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| 389 | constructor(selector, cbContext, listContext) {
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| 390 | this.selector = selector;
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| 391 | this.cbContext = cbContext;
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| 392 | this.listContext = listContext;
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| 393 | this.notSelectors = selector.notSelectors;
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| 394 | }
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| 395 | finalize(cssSelector, callback) {
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| 396 | let result = true;
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| 397 | if (this.notSelectors.length > 0 && (!this.listContext || !this.listContext.alreadyMatched)) {
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| 398 | const notMatcher = SelectorMatcher.createNotMatcher(this.notSelectors);
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| 399 | result = !notMatcher.match(cssSelector, null);
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| 400 | }
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| 401 | if (result && callback && (!this.listContext || !this.listContext.alreadyMatched)) {
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| 402 | if (this.listContext) {
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| 403 | this.listContext.alreadyMatched = true;
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| 404 | }
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| 405 | callback(this.selector, this.cbContext);
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| 406 | }
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| 407 | return result;
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| 408 | }
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| 409 | }
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| 410 | //# 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* @license\n * Copyright Google LLC 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\\\\()|' +               // 1: \":not(\"\n        '(([\\\\.\\\\#]?)[-\\\\w]+)|' +  // 2: \"tag\"; 3: \".\"/\"#\";\n        // \"-\" should appear first in the regexp below as FF31 parses \"[.-\\w]\" as a range\n        // 4: attribute; 5: attribute_string; 6: attribute_value\n        '(?:\\\\[([-.\\\\w*\\\\\\\\$]+)(?:=([\\\"\\']?)([^\\\\]\\\"\\']*)\\\\5)?\\\\])|' +  // \"[name]\", \"[name=value]\",\n                                                                        // \"[name=\"value\"]\",\n                                                                        // \"[name='value']\"\n        '(\\\\))|' +                                                      // 7: \")\"\n        '(\\\\s*,\\\\s*)',                                                  // 8: \",\"\n    'g');\n\n/**\n * These offsets should match the match-groups in `_SELECTOR_REGEXP` offsets.\n */\nconst enum SelectorRegexp {\n  ALL = 0,  // The whole match\n  NOT = 1,\n  TAG = 2,\n  PREFIX = 3,\n  ATTRIBUTE = 4,\n  ATTRIBUTE_STRING = 5,\n  ATTRIBUTE_VALUE = 6,\n  NOT_END = 7,\n  SEPARATOR = 8,\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[SelectorRegexp.NOT]) {\n        if (inNot) {\n          throw new Error('Nesting :not in a selector is not allowed');\n        }\n        inNot = true;\n        current = new CssSelector();\n        cssSelector.notSelectors.push(current);\n      }\n      const tag = match[SelectorRegexp.TAG];\n      if (tag) {\n        const prefix = match[SelectorRegexp.PREFIX];\n        if (prefix === '#') {\n          // #hash\n          current.addAttribute('id', tag.substr(1));\n        } else if (prefix === '.') {\n          // Class\n          current.addClassName(tag.substr(1));\n        } else {\n          // Element\n          current.setElement(tag);\n        }\n      }\n      const attribute = match[SelectorRegexp.ATTRIBUTE];\n\n      if (attribute) {\n        current.addAttribute(\n            current.unescapeAttribute(attribute), match[SelectorRegexp.ATTRIBUTE_VALUE]);\n      }\n      if (match[SelectorRegexp.NOT_END]) {\n        inNot = false;\n        current = cssSelector;\n      }\n      if (match[SelectorRegexp.SEPARATOR]) {\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  /**\n   * Unescape `\\$` sequences from the CSS attribute selector.\n   *\n   * This is needed because `$` can have a special meaning in CSS selectors,\n   * but we might want to match an attribute that contains `$`.\n   * [MDN web link for more\n   * info](https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors).\n   * @param attr the attribute to unescape.\n   * @returns the unescaped string.\n   */\n  unescapeAttribute(attr: string): string {\n    let result = '';\n    let escaping = false;\n    for (let i = 0; i < attr.length; i++) {\n      const char = attr.charAt(i);\n      if (char === '\\\\') {\n        escaping = true;\n        continue;\n      }\n      if (char === '$' && !escaping) {\n        throw new Error(\n            `Error in attribute selector \"${attr}\". ` +\n            `Unescaped \"$\" is not supported. Please escape with \"\\\\$\".`);\n      }\n      escaping = false;\n      result += char;\n    }\n    return result;\n  }\n\n  /**\n   * Escape `$` sequences from the CSS attribute selector.\n   *\n   * This is needed because `$` can have a special meaning in CSS selectors,\n   * with this method we are escaping `$` with `\\$'.\n   * [MDN web link for more\n   * info](https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors).\n   * @param attr the attribute to escape.\n   * @returns the escaped string. \n   */\n  escapeAttribute(attr: string): string {\n    return attr.replace(/\\\\/g, '\\\\\\\\').replace(/\\$/g, '\\\\$');\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 {\n    return !!this.element;\n  }\n\n  setElement(element: string|null = null) {\n    this.element = element;\n  }\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}></${tagName}>`;\n  }\n\n  getAttrs(): string[] {\n    const result: string[] = [];\n    if (this.classNames.length > 0) {\n      result.push('class', this.classNames.join(' '));\n    }\n    return result.concat(this.attrs);\n  }\n\n  addAttribute(name: string, value: string = '') {\n    this.attrs.push(name, value && value.toLowerCase() || '');\n  }\n\n  addClassName(name: string) {\n    this.classNames.push(name.toLowerCase());\n  }\n\n  toString(): string {\n    let res: string = this.element || '';\n    if (this.classNames) {\n      this.classNames.forEach(klass => res += `.${klass}`);\n    }\n    if (this.attrs) {\n      for (let i = 0; i < this.attrs.length; i += 2) {\n        const name = this.escapeAttribute(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<T = any> {\n  static createNotMatcher(notSelectors: CssSelector[]): SelectorMatcher<null> {\n    const notMatcher = new SelectorMatcher<null>();\n    notMatcher.addSelectables(notSelectors, null);\n    return notMatcher;\n  }\n\n  private _elementMap = new Map<string, SelectorContext<T>[]>();\n  private _elementPartialMap = new Map<string, SelectorMatcher<T>>();\n  private _classMap = new Map<string, SelectorContext<T>[]>();\n  private _classPartialMap = new Map<string, SelectorMatcher<T>>();\n  private _attrValueMap = new Map<string, Map<string, SelectorContext<T>[]>>();\n  private _attrValuePartialMap = new Map<string, Map<string, SelectorMatcher<T>>>();\n  private _listContexts: SelectorListContext[] = [];\n\n  addSelectables(cssSelectors: CssSelector[], callbackCtxt?: T) {\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 as T, 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: T, listContext: SelectorListContext) {\n    let matcher: SelectorMatcher<T> = 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<T>[]>();\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<T>>();\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<T>[]>, name: string, selectable: SelectorContext<T>) {\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<T>>, name: string): SelectorMatcher<T> {\n    let matcher = map.get(name);\n    if (!matcher) {\n      matcher = new SelectorMatcher<T>();\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: T) => void)|null): 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<T>[]>, 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<T>[] = map.get(name) || [];\n    const starSelectables: SelectorContext<T>[] = map.get('*')!;\n    if (starSelectables) {\n      selectables = selectables.concat(starSelectables);\n    }\n    if (selectables.length === 0) {\n      return false;\n    }\n    let selectable: SelectorContext<T>;\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<T>>, 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<T = any> {\n  notSelectors: CssSelector[];\n\n  constructor(\n      public selector: CssSelector, public cbContext: T, public listContext: SelectorListContext) {\n    this.notSelectors = selector.notSelectors;\n  }\n\n  finalize(cssSelector: CssSelector, callback: ((c: CssSelector, a: T) => 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"]} |
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