onedeuxtriseigo.nullpo.dev
Pop-up dictionary browser extension for language learning. Successor to Yomichan. (PERSONAL FORK)
1/*
2 * Copyright (C) 2024-2025 Yomitan Authors
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 */
17
18import {ExtensionError} from '../core/extension-error.js';
19import {log} from '../core/log.js';
20import {DictionaryDatabase} from './dictionary-database.js';
21
22export class DictionaryDatabaseWorkerHandler {
23 constructor() {
24 /** @type {DictionaryDatabase?} */
25 this._dictionaryDatabase = null;
26 }
27
28 /**
29 *
30 */
31 async prepare() {
32 this._dictionaryDatabase = new DictionaryDatabase();
33 try {
34 await this._dictionaryDatabase.prepare();
35 } catch (e) {
36 log.error(e);
37 }
38 self.addEventListener('message', this._onMessage.bind(this), false);
39 self.addEventListener('messageerror', (event) => {
40 const error = new ExtensionError('DictionaryDatabaseWorkerHandler: Error receiving message from main thread');
41 error.data = event;
42 log.error(error);
43 });
44 }
45 // Private
46
47 /**
48 * @param {MessageEvent<import('dictionary-database-worker-handler').MessageToWorker>} event
49 */
50 _onMessage(event) {
51 const {action} = event.data;
52 switch (action) {
53 case 'connectToDatabaseWorker':
54 void this._dictionaryDatabase?.connectToDatabaseWorker(event.ports[0]);
55 break;
56 default:
57 log.error(`Unknown action: ${action}`);
58 }
59 }
60}