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-rw-r--r--ext/mixed/js/template-handler.js53
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diff --git a/ext/mixed/js/template-handler.js b/ext/mixed/js/template-handler.js
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+/*
+ * Copyright (C) 2020 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * 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 TemplateHandler {
+ constructor(html) {
+ this._templates = new Map();
+ this._html = html;
+ this._doc = null;
+
+ this._initialize();
+ }
+
+ _initialize() {
+ this._doc = new DOMParser().parseFromString(this._html, 'text/html');
+ for (const template of this._doc.querySelectorAll('template')) {
+ this._setTemplate(template);
+ }
+ }
+
+ _setTemplate(template) {
+ const idMatch = template.id.match(/^([a-z-]+)-template$/);
+ if (!idMatch) {
+ throw new Error(`Invalid template ID: ${template.id}`);
+ }
+ this._templates.set(idMatch[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);
+ }
+}