/* * 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 <https://www.gnu.org/licenses/>. */ class Environment { constructor() { this._cachedEnvironmentInfo = null; } async prepare() { this._cachedEnvironmentInfo = await this._loadEnvironmentInfo(); } getInfo() { if (this._cachedEnvironmentInfo === null) { throw new Error('Not prepared'); } return this._cachedEnvironmentInfo; } async _loadEnvironmentInfo() { const browser = await this._getBrowser(); const platform = await new Promise((resolve) => chrome.runtime.getPlatformInfo(resolve)); const modifierInfo = this._getModifierInfo(browser, platform.os); return { browser, platform: { os: platform.os }, modifiers: modifierInfo }; } async _getBrowser() { if (EXTENSION_IS_BROWSER_EDGE) { return 'edge'; } if (typeof browser !== 'undefined') { try { const info = await browser.runtime.getBrowserInfo(); if (info.name === 'Fennec') { return 'firefox-mobile'; } } catch (e) { // NOP } return 'firefox'; } else { return 'chrome'; } } _getModifierInfo(browser, os) { let osKeys; let separator; switch (os) { case 'win': separator = ' + '; osKeys = [ ['alt', 'Alt'], ['ctrl', 'Ctrl'], ['shift', 'Shift'], ['meta', 'Windows'] ]; break; case 'mac': separator = ''; osKeys = [ ['alt', '⌥'], ['ctrl', '⌃'], ['shift', '⇧'], ['meta', '⌘'] ]; break; case 'linux': case 'openbsd': case 'cros': case 'android': separator = ' + '; osKeys = [ ['alt', 'Alt'], ['ctrl', 'Ctrl'], ['shift', 'Shift'], ['meta', 'Super'] ]; break; default: throw new Error(`Invalid OS: ${os}`); } const isFirefox = (browser === 'firefox' || browser === 'firefox-mobile'); const keys = []; for (const [value, name] of osKeys) { // Firefox doesn't support event.metaKey on platforms other than macOS if (value === 'meta' && isFirefox && os !== 'mac') { continue; } keys.push({value, name}); } return {keys, separator}; } }