/* * Copyright (C) 2020-2021 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 <http://www.gnu.org/licenses/>. */ class HtmlTemplateCollection { constructor(source) { this._templates = new Map(); const sourceNode = ( typeof source === 'string' ? new DOMParser().parseFromString(source, 'text/html') : source ); const pattern = /^([\w\W]+)-template$/; for (const template of sourceNode.querySelectorAll('template')) { const match = pattern.exec(template.id); if (match === null) { continue; } this._prepareTemplate(template); this._templates.set(match[1], template); } } instantiate(name) { const template = this._templates.get(name); return document.importNode(template.content.firstChild, true); } instantiateFragment(name) { const template = this._templates.get(name); return document.importNode(template.content, true); } // Private _prepareTemplate(template) { if (template.dataset.removeWhitespaceText === 'true') { this._removeWhitespaceText(template); } } _removeWhitespaceText(template) { const {content} = template; const {TEXT_NODE} = Node; const iterator = document.createNodeIterator(content, NodeFilter.SHOW_TEXT); const removeNodes = []; while (true) { const node = iterator.nextNode(); if (node === null) { break; } if (node.nodeType === TEXT_NODE && node.nodeValue.trim().length === 0) { removeNodes.push(node); } } for (const node of removeNodes) { const {parentNode} = node; if (parentNode !== null) { parentNode.removeChild(node); } } } }