/* * Copyright (C) 2020 Yomichan Authors * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ const fs = require('fs'); const path = require('path'); const assert = require('assert'); const {JSDOM} = require('jsdom'); const {VM} = require('./yomichan-vm'); function createJSDOM(fileName) { const domSource = fs.readFileSync(fileName, {encoding: 'utf8'}); return new JSDOM(domSource); } function querySelectorTextNode(element, selector) { let textIndex = -1; const match = /::text$|::nth-text\((\d+)\)$/.exec(selector); if (match !== null) { textIndex = (match[1] ? parseInt(match[1], 10) - 1 : 0); selector = selector.substring(0, selector.length - match[0].length); } const result = element.querySelector(selector); if (textIndex < 0) { return result; } for (let n = result.firstChild; n !== null; n = n.nextSibling) { if (n.nodeType === n.constructor.TEXT_NODE) { if (textIndex === 0) { return n; } --textIndex; } } return null; } function getComputedFontSizeInPixels(window, getComputedStyle, element) { for (; element !== null; element = element.parentNode) { if (element.nodeType === window.Node.ELEMENT_NODE) { const fontSize = getComputedStyle(element).fontSize; if (fontSize.endsWith('px')) { const value = parseFloat(fontSize.substring(0, fontSize.length - 2)); return value; } } } const defaultFontSize = 14; return defaultFontSize; } function createAbsoluteGetComputedStyle(window) { // Wrapper to convert em units to px units const getComputedStyleOld = window.getComputedStyle.bind(window); return (element, ...args) => { const style = getComputedStyleOld(element, ...args); return new Proxy(style, { get: (target, property) => { let result = target[property]; if (typeof result === 'string') { result = result.replace(/([-+]?\d(?:\.\d)?(?:[eE][-+]?\d+)?)em/g, (g0, g1) => { const fontSize = getComputedFontSizeInPixels(window, getComputedStyleOld, element); return `${parseFloat(g1) * fontSize}px`; }); } return result; } }); }; } async function testDomTextScanner(dom, {DOMTextScanner}) { const document = dom.window.document; for (const testElement of document.querySelectorAll('y-test')) { let testData = JSON.parse(testElement.dataset.testData); if (!Array.isArray(testData)) { testData = [testData]; } for (const testDataItem of testData) { let { node, offset, length, forcePreserveWhitespace, generateLayoutContent, reversible, expected: { node: expectedNode, offset: expectedOffset, content: expectedContent, remainder: expectedRemainder } } = testDataItem; node = querySelectorTextNode(testElement, node); expectedNode = querySelectorTextNode(testElement, expectedNode); // Standard test { const scanner = new DOMTextScanner(node, offset, forcePreserveWhitespace, generateLayoutContent); scanner.seek(length); const {node: actualNode1, offset: actualOffset1, content: actualContent1, remainder: actualRemainder1} = scanner; assert.strictEqual(actualContent1, expectedContent); assert.strictEqual(actualOffset1, expectedOffset); assert.strictEqual(actualNode1, expectedNode); assert.strictEqual(actualRemainder1, expectedRemainder || 0); } // Substring tests for (let i = 1; i <= length; ++i) { const scanner = new DOMTextScanner(node, offset, forcePreserveWhitespace, generateLayoutContent); scanner.seek(length - i); const {content: actualContent} = scanner; assert.strictEqual(actualContent, expectedContent.substring(0, expectedContent.length - i)); } if (reversible === false) { continue; } // Reversed test { const scanner = new DOMTextScanner(expectedNode, expectedOffset, forcePreserveWhitespace, generateLayoutContent); scanner.seek(-length); const {content: actualContent} = scanner; assert.strictEqual(actualContent, expectedContent); } // Reversed substring tests for (let i = 1; i <= length; ++i) { const scanner = new DOMTextScanner(expectedNode, expectedOffset, forcePreserveWhitespace, generateLayoutContent); scanner.seek(-(length - i)); const {content: actualContent} = scanner; assert.strictEqual(actualContent, expectedContent.substring(i)); } } } } async function testDocument1() { const dom = createJSDOM(path.join(__dirname, 'data', 'html', 'test-dom-text-scanner.html')); const window = dom.window; try { const {document, Node, Range} = window; window.getComputedStyle = createAbsoluteGetComputedStyle(window); const vm = new VM({document, window, Range, Node}); vm.execute('fg/js/dom-text-scanner.js'); const DOMTextScanner = vm.get('DOMTextScanner'); await testDomTextScanner(dom, {DOMTextScanner}); } finally { window.close(); } } async function main() { await testDocument1(); } if (require.main === module) { main(); }