yomichan/ext/mixed/js/extension.js

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/*
* Copyright (C) 2019 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/>.
*/
// toIterable is required on Edge for cross-window origin objects.
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function toIterable(value) {
if (typeof Symbol !== 'undefined' && typeof value[Symbol.iterator] !== 'undefined') {
return value;
}
if (value !== null && typeof value === 'object') {
const length = value.length;
if (typeof length === 'number' && Number.isFinite(length)) {
const array = [];
for (let i = 0; i < length; ++i) {
array.push(value[i]);
}
return array;
}
}
throw 'Could not convert to iterable';
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}
function extensionHasChrome() {
try {
return typeof chrome === 'object' && chrome !== null;
} catch (e) {
return false;
}
}
function extensionHasBrowser() {
try {
return typeof browser === 'object' && browser !== null;
} catch (e) {
return false;
}
}
const EXTENSION_IS_BROWSER_EDGE = (
extensionHasBrowser() &&
(!extensionHasChrome() || (typeof chrome.runtime === 'undefined' && typeof browser.runtime !== 'undefined'))
);
if (EXTENSION_IS_BROWSER_EDGE) {
// Edge does not have chrome defined.
chrome = browser;
}