yomichan/ext/bg/js/util.js

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/*
* Copyright (C) 2016-2020 Yomichan Authors
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*
* 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
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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function utilIsolate(value) {
if (value === null) { return null; }
switch (typeof value) {
case 'boolean':
case 'number':
case 'string':
case 'bigint':
case 'symbol':
return value;
}
const stringValue = JSON.stringify(value);
return typeof stringValue === 'string' ? JSON.parse(stringValue) : null;
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}
function utilFunctionIsolate(func) {
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return function isolatedFunction(...args) {
try {
args = args.map((v) => utilIsolate(v));
return func.call(this, ...args);
} catch (e) {
try {
String(func);
} catch (e2) {
// Dead object
return;
}
throw e;
}
};
}
function utilBackgroundIsolate(data) {
const backgroundPage = chrome.extension.getBackgroundPage();
return backgroundPage.utilIsolate(data);
}
function utilBackgroundFunctionIsolate(func) {
const backgroundPage = chrome.extension.getBackgroundPage();
return backgroundPage.utilFunctionIsolate(func);
}
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function utilBackend() {
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const backend = chrome.extension.getBackgroundPage().yomichanBackend;
if (!backend.isPrepared()) {
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throw new Error('Backend not ready yet');
}
return backend;
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}
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function utilReadFileArrayBuffer(file) {
return new Promise((resolve, reject) => {
const reader = new FileReader();
reader.onload = () => resolve(reader.result);
reader.onerror = () => reject(reader.error);
reader.readAsArrayBuffer(file);
});
}