/* * Copyright (C) 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 <https://www.gnu.org/licenses/>. */ class SearchPersistentStateController extends EventDispatcher { constructor() { super(); this._mode = null; } get mode() { return this._mode; } set mode(value) { this._setMode(value, true); } prepare() { this._updateMode(); } // Private _updateMode() { let mode = null; try { mode = sessionStorage.getItem('mode'); } catch (e) { // Browsers can throw a SecurityError when cookie blocking is enabled. } this._setMode(mode, false); } _setMode(mode, save) { if (mode === this._mode) { return; } if (save) { try { if (mode === null) { sessionStorage.removeItem('mode'); } else { sessionStorage.setItem('mode', mode); } } catch (e) { // Browsers can throw a SecurityError when cookie blocking is enabled. } } this._mode = mode; document.documentElement.dataset.searchMode = (mode !== null ? mode : ''); this.trigger('modeChange', {mode}); } }