95 lines
3.1 KiB
JavaScript
95 lines
3.1 KiB
JavaScript
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/*
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* Copyright (C) 2021 Yomichan Authors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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class PersistentStorageController {
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constructor() {
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this._persistentStorageCheckbox = false;
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}
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async prepare() {
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this._persistentStorageCheckbox = document.querySelector('#storage-persistent-checkbox');
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this._persistentStorageCheckbox.addEventListener('change', this._onPersistentStorageCheckboxChange.bind(this), false);
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const button = document.querySelector('#storage-persistent-button');
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if (button !== null) {
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button.hidden = false;
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button.addEventListener('click', this._onPersistStorageButtonClick.bind(this), false);
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}
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if (!this._isPersistentStorageSupported()) { return; }
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const info = document.querySelector('#storage-persistent-info');
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if (info !== null) { info.hidden = false; }
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const isStoragePeristent = await this.isStoragePeristent();
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this._updateCheckbox(isStoragePeristent);
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}
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async isStoragePeristent() {
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try {
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return await navigator.storage.persisted();
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} catch (e) {
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// NOP
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}
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return false;
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}
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// Private
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_onPersistentStorageCheckboxChange(e) {
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const node = e.currentTarget;
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if (node.checked) {
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node.checked = false;
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this._attemptPersistStorage();
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} else {
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node.checked = true;
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}
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}
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_onPersistStorageButtonClick() {
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const {checked} = this._persistentStorageCheckbox;
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if (checked) { return; }
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this._persistentStorageCheckbox.checked = !checked;
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this._persistentStorageCheckbox.dispatchEvent(new Event('change'));
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}
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async _attemptPersistStorage() {
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let isStoragePeristent = false;
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try {
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isStoragePeristent = await navigator.storage.persist();
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} catch (e) {
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// NOP
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}
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this._updateCheckbox(isStoragePeristent);
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const node = document.querySelector('#storage-persistent-fail-warning');
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if (node !== null) { node.hidden = isStoragePeristent; }
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yomichan.trigger('storageChanged');
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}
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_isPersistentStorageSupported() {
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return isObject(navigator.storage) && typeof navigator.storage.persist === 'function';
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}
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_updateCheckbox(isStoragePeristent) {
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this._persistentStorageCheckbox.checked = isStoragePeristent;
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this._persistentStorageCheckbox.readOnly = isStoragePeristent;
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}
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}
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