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+/*
+ * 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');
+
+
+// DOMRect class definition
+class DOMRect {
+ constructor(x, y, width, height) {
+ this._x = x;
+ this._y = y;
+ this._width = width;
+ this._height = height;
+ }
+
+ get x() { return this._x; }
+ get y() { return this._y; }
+ get width() { return this._width; }
+ get height() { return this._height; }
+ get left() { return this._x + Math.min(0, this._width); }
+ get right() { return this._x + Math.max(0, this._width); }
+ get top() { return this._y + Math.min(0, this._height); }
+ get bottom() { return this._y + Math.max(0, this._height); }
+}
+
+
+function createJSDOM(fileName) {
+ const domSource = fs.readFileSync(fileName, {encoding: 'utf8'});
+ const dom = new JSDOM(domSource);
+ const document = dom.window.document;
+ const window = dom.window;
+
+ // Define innerText setter as an alias for textContent setter
+ Object.defineProperty(window.HTMLDivElement.prototype, 'innerText', {
+ set(value) { this.textContent = value; }
+ });
+
+ // Placeholder for feature detection
+ document.caretRangeFromPoint = () => null;
+
+ return dom;
+}
+
+function querySelectorChildOrSelf(element, selector) {
+ return selector ? element.querySelector(selector) : element;
+}
+
+function getChildTextNodeOrSelf(dom, node) {
+ if (node === null) { return null; }
+ const Node = dom.window.Node;
+ const childNode = node.firstChild;
+ return (childNode !== null && childNode.nodeType === Node.TEXT_NODE ? childNode : node);
+}
+
+function getPrototypeOfOrNull(value) {
+ try {
+ return Object.getPrototypeOf(value);
+ } catch (e) {
+ return null;
+ }
+}
+
+function findImposterElement(document) {
+ // Finds the imposter element based on it's z-index style
+ return document.querySelector('div[style*="2147483646"]>*');
+}
+
+
+async function testDocument1() {
+ const dom = createJSDOM(path.join(__dirname, 'data', 'html', 'test-document1.html'));
+ const window = dom.window;
+ const document = window.document;
+ const Node = window.Node;
+ const Range = window.Range;
+
+ const vm = new VM({document, window, Range, Node});
+ vm.execute([
+ 'mixed/js/dom.js',
+ 'fg/js/dom-text-scanner.js',
+ 'fg/js/source.js',
+ 'fg/js/document-util.js'
+ ]);
+ const [DOMTextScanner, TextSourceRange, TextSourceElement, DocumentUtil] = vm.get([
+ 'DOMTextScanner',
+ 'TextSourceRange',
+ 'TextSourceElement',
+ 'DocumentUtil'
+ ]);
+
+ try {
+ await testDocumentTextScanningFunctions(dom, {DocumentUtil, TextSourceRange, TextSourceElement});
+ await testTextSourceRangeSeekFunctions(dom, {DOMTextScanner});
+ } finally {
+ window.close();
+ }
+}
+
+async function testDocumentTextScanningFunctions(dom, {DocumentUtil, TextSourceRange, TextSourceElement}) {
+ const document = dom.window.document;
+
+ for (const testElement of document.querySelectorAll('.test[data-test-type=scan]')) {
+ // Get test parameters
+ let {
+ elementFromPointSelector,
+ caretRangeFromPointSelector,
+ startNodeSelector,
+ startOffset,
+ endNodeSelector,
+ endOffset,
+ resultType,
+ sentenceExtent,
+ sentence,
+ hasImposter
+ } = testElement.dataset;
+
+ const elementFromPointValue = querySelectorChildOrSelf(testElement, elementFromPointSelector);
+ const caretRangeFromPointValue = querySelectorChildOrSelf(testElement, caretRangeFromPointSelector);
+ const startNode = getChildTextNodeOrSelf(dom, querySelectorChildOrSelf(testElement, startNodeSelector));
+ const endNode = getChildTextNodeOrSelf(dom, querySelectorChildOrSelf(testElement, endNodeSelector));
+
+ startOffset = parseInt(startOffset, 10);
+ endOffset = parseInt(endOffset, 10);
+ sentenceExtent = parseInt(sentenceExtent, 10);
+
+ assert.notStrictEqual(elementFromPointValue, null);
+ assert.notStrictEqual(caretRangeFromPointValue, null);
+ assert.notStrictEqual(startNode, null);
+ assert.notStrictEqual(endNode, null);
+
+ // Setup functions
+ document.elementFromPoint = () => elementFromPointValue;
+
+ document.caretRangeFromPoint = (x, y) => {
+ const imposter = getChildTextNodeOrSelf(dom, findImposterElement(document));
+ assert.strictEqual(!!imposter, hasImposter === 'true');
+
+ const range = document.createRange();
+ range.setStart(imposter ? imposter : startNode, startOffset);
+ range.setEnd(imposter ? imposter : startNode, endOffset);
+
+ // Override getClientRects to return a rect guaranteed to contain (x, y)
+ range.getClientRects = () => [new DOMRect(x - 1, y - 1, 2, 2)];
+ return range;
+ };
+
+ // Test docRangeFromPoint
+ const documentUtil = new DocumentUtil();
+ const source = documentUtil.getRangeFromPoint(0, 0, false);
+ switch (resultType) {
+ case 'TextSourceRange':
+ assert.strictEqual(getPrototypeOfOrNull(source), TextSourceRange.prototype);
+ break;
+ case 'TextSourceElement':
+ assert.strictEqual(getPrototypeOfOrNull(source), TextSourceElement.prototype);
+ break;
+ case 'null':
+ assert.strictEqual(source, null);
+ break;
+ default:
+ assert.ok(false);
+ break;
+ }
+ if (source === null) { continue; }
+
+ // Test docSentenceExtract
+ const sentenceActual = documentUtil.extractSentence(source, sentenceExtent, false).text;
+ assert.strictEqual(sentenceActual, sentence);
+
+ // Clean
+ source.cleanup();
+ }
+}
+
+async function testTextSourceRangeSeekFunctions(dom, {DOMTextScanner}) {
+ const document = dom.window.document;
+
+ for (const testElement of document.querySelectorAll('.test[data-test-type=text-source-range-seek]')) {
+ // Get test parameters
+ let {
+ seekNodeSelector,
+ seekNodeIsText,
+ seekOffset,
+ seekLength,
+ seekDirection,
+ expectedResultNodeSelector,
+ expectedResultNodeIsText,
+ expectedResultOffset,
+ expectedResultContent
+ } = testElement.dataset;
+
+ seekOffset = parseInt(seekOffset, 10);
+ seekLength = parseInt(seekLength, 10);
+ expectedResultOffset = parseInt(expectedResultOffset, 10);
+
+ let seekNode = testElement.querySelector(seekNodeSelector);
+ if (seekNodeIsText === 'true') {
+ seekNode = seekNode.firstChild;
+ }
+
+ let expectedResultNode = testElement.querySelector(expectedResultNodeSelector);
+ if (expectedResultNodeIsText === 'true') {
+ expectedResultNode = expectedResultNode.firstChild;
+ }
+
+ const {node, offset, content} = (
+ seekDirection === 'forward' ?
+ new DOMTextScanner(seekNode, seekOffset, true, false).seek(seekLength) :
+ new DOMTextScanner(seekNode, seekOffset, true, false).seek(-seekLength)
+ );
+
+ assert.strictEqual(node, expectedResultNode);
+ assert.strictEqual(offset, expectedResultOffset);
+ assert.strictEqual(content, expectedResultContent);
+ }
+}
+
+
+async function main() {
+ await testDocument1();
+}
+
+
+if (require.main === module) { main(); }