/** * Copyright (c) Microsoft Corporation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import { SelectorEngine, SelectorType, SelectorRoot } from './selectorEngine'; export function createTextSelector(shadow: boolean): SelectorEngine { const engine: SelectorEngine = { create(root: SelectorRoot, targetElement: Element, type: SelectorType): string | undefined { const document = root instanceof Document ? root : root.ownerDocument; if (!document) return; for (let child = targetElement.firstChild; child; child = child.nextSibling) { if (child.nodeType === 3 /* Node.TEXT_NODE */) { const text = child.nodeValue; if (!text) continue; if (text.match(/^\s*[a-zA-Z0-9]+\s*$/) && engine.query(root, text.trim()) === targetElement) return text.trim(); if (queryInternal(root, createMatcher(JSON.stringify(text)), shadow) === targetElement) return JSON.stringify(text); } } }, query(root: SelectorRoot, selector: string): Element | undefined { return queryInternal(root, createMatcher(selector), shadow); }, queryAll(root: SelectorRoot, selector: string): Element[] { const result: Element[] = []; queryAllInternal(root, createMatcher(selector), shadow, result); return result; } }; return engine; } function unescape(s: string): string { if (!s.includes('\\')) return s; const r: string[] = []; let i = 0; while (i < s.length) { if (s[i] === '\\' && i + 1 < s.length) i++; r.push(s[i++]); } return r.join(''); } type Matcher = (text: string) => boolean; function createMatcher(selector: string): Matcher { if (selector.length > 1 && selector[0] === '"' && selector[selector.length - 1] === '"') { const parsed = unescape(selector.substring(1, selector.length - 1)); return text => text === parsed; } if (selector.length > 1 && selector[0] === "'" && selector[selector.length - 1] === "'") { const parsed = unescape(selector.substring(1, selector.length - 1)); return text => text === parsed; } if (selector[0] === '/' && selector.lastIndexOf('/') > 0) { const lastSlash = selector.lastIndexOf('/'); const re = new RegExp(selector.substring(1, lastSlash), selector.substring(lastSlash + 1)); return text => re.test(text); } selector = selector.trim().toLowerCase().replace(/\s+/g, ' '); return text => text.toLowerCase().replace(/\s+/g, ' ').includes(selector); } // Skips ,