yomichan/ext/mixed/js/html-template-collection.js

/*
 * 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 <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._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);
    }
}