115 lines
3.4 KiB
JavaScript
115 lines
3.4 KiB
JavaScript
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/*
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* Copyright (C) 2020 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 Environment {
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constructor() {
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this._cachedEnvironmentInfo = null;
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}
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async prepare() {
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this._cachedEnvironmentInfo = await this._loadEnvironmentInfo();
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}
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getInfo() {
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if (this._cachedEnvironmentInfo === null) { throw new Error('Not prepared'); }
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return this._cachedEnvironmentInfo;
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}
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async _loadEnvironmentInfo() {
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const browser = await this._getBrowser();
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const platform = await new Promise((resolve) => chrome.runtime.getPlatformInfo(resolve));
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const modifierInfo = this._getModifierInfo(browser, platform.os);
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return {
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browser,
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platform: {
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os: platform.os
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},
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modifiers: modifierInfo
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};
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}
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async _getBrowser() {
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if (EXTENSION_IS_BROWSER_EDGE) {
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return 'edge';
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}
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if (typeof browser !== 'undefined') {
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try {
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const info = await browser.runtime.getBrowserInfo();
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if (info.name === 'Fennec') {
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return 'firefox-mobile';
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}
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} catch (e) {
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// NOP
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}
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return 'firefox';
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} else {
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return 'chrome';
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}
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}
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_getModifierInfo(browser, os) {
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let osKeys;
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let separator;
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switch (os) {
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case 'win':
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separator = ' + ';
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osKeys = [
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['alt', 'Alt'],
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['ctrl', 'Ctrl'],
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['shift', 'Shift'],
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['meta', 'Windows']
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];
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break;
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case 'mac':
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separator = '';
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osKeys = [
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['alt', '⌥'],
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['ctrl', '⌃'],
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['shift', '⇧'],
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['meta', '⌘']
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];
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break;
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case 'linux':
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case 'openbsd':
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case 'cros':
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case 'android':
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separator = ' + ';
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osKeys = [
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['alt', 'Alt'],
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['ctrl', 'Ctrl'],
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['shift', 'Shift'],
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['meta', 'Super']
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];
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break;
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default:
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throw new Error(`Invalid OS: ${os}`);
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}
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const isFirefox = (browser === 'firefox' || browser === 'firefox-mobile');
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const keys = [];
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for (const [value, name] of osKeys) {
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// Firefox doesn't support event.metaKey on platforms other than macOS
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if (value === 'meta' && isFirefox && os !== 'mac') { continue; }
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keys.push({value, name});
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}
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return {keys, separator};
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}
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}
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