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/*
* Copyright (C) 2023 Yomitan Authors
* Copyright (C) 2016-2022 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/>.
*/
import * as wanakana from '../../lib/wanakana.js';
import {ClipboardReader} from '../comm/clipboard-reader.js';
import {invokeMessageHandler} from '../core.js';
import {ArrayBufferUtil} from '../data/sandbox/array-buffer-util.js';
import {DictionaryDatabase} from '../language/dictionary-database.js';
import {JapaneseUtil} from '../language/sandbox/japanese-util.js';
import {Translator} from '../language/translator.js';
import {yomichan} from '../yomichan.js';
/**
* This class controls the core logic of the extension, including API calls
* and various forms of communication between browser tabs and external applications.
*/
export class Offscreen {
/**
* Creates a new instance.
*/
constructor() {
this._japaneseUtil = new JapaneseUtil(wanakana);
this._dictionaryDatabase = new DictionaryDatabase();
this._translator = new Translator({
japaneseUtil: this._japaneseUtil,
database: this._dictionaryDatabase
});
this._clipboardReader = new ClipboardReader({
// eslint-disable-next-line no-undef
document: (typeof document === 'object' && document !== null ? document : null),
pasteTargetSelector: '#clipboard-paste-target',
richContentPasteTargetSelector: '#clipboard-rich-content-paste-target'
});
this._messageHandlers = new Map([
['clipboardGetTextOffscreen', {async: true, contentScript: true, handler: this._getTextHandler.bind(this)}],
['clipboardGetImageOffscreen', {async: true, contentScript: true, handler: this._getImageHandler.bind(this)}],
['databasePrepareOffscreen', {async: true, contentScript: true, handler: this._prepareDatabaseHandler.bind(this)}],
['getDictionaryInfoOffscreen', {async: true, contentScript: true, handler: this._getDictionaryInfoHandler.bind(this)}],
['databasePurgeOffscreen', {async: true, contentScript: true, handler: this._purgeDatabaseHandler.bind(this)}],
['databaseGetMediaOffscreen', {async: true, contentScript: true, handler: this._getMediaHandler.bind(this)}],
['translatorPrepareOffscreen', {async: false, contentScript: true, handler: this._prepareTranslatorHandler.bind(this)}],
['findKanjiOffscreen', {async: true, contentScript: true, handler: this._findKanjiHandler.bind(this)}],
['findTermsOffscreen', {async: true, contentScript: true, handler: this._findTermsHandler.bind(this)}],
['getTermFrequenciesOffscreen', {async: true, contentScript: true, handler: this._getTermFrequenciesHandler.bind(this)}],
['clearDatabaseCachesOffscreen', {async: false, contentScript: true, handler: this._clearDatabaseCachesHandler.bind(this)}]
]);
const onMessage = this._onMessage.bind(this);
chrome.runtime.onMessage.addListener(onMessage);
this._prepareDatabasePromise = null;
}
_getTextHandler({useRichText}) {
return this._clipboardReader.getText(useRichText);
}
_getImageHandler() {
return this._clipboardReader.getImage();
}
_prepareDatabaseHandler() {
if (this._prepareDatabasePromise !== null) {
return this._prepareDatabasePromise;
}
this._prepareDatabasePromise = this._dictionaryDatabase.prepare();
return this._prepareDatabasePromise;
}
_getDictionaryInfoHandler() {
return this._dictionaryDatabase.getDictionaryInfo();
}
_purgeDatabaseHandler() {
return this._dictionaryDatabase.purge();
}
async _getMediaHandler({targets}) {
const media = await this._dictionaryDatabase.getMedia(targets);
const serializedMedia = media.map((m) => ({...m, content: ArrayBufferUtil.arrayBufferToBase64(m.content)}));
return serializedMedia;
}
_prepareTranslatorHandler({deinflectionReasons}) {
return this._translator.prepare(deinflectionReasons);
}
_findKanjiHandler({text, findKanjiOptions}) {
findKanjiOptions.enabledDictionaryMap = new Map(findKanjiOptions.enabledDictionaryMap);
return this._translator.findKanji(text, findKanjiOptions);
}
_findTermsHandler({mode, text, findTermsOptions}) {
findTermsOptions.enabledDictionaryMap = new Map(findTermsOptions.enabledDictionaryMap);
if (findTermsOptions.excludeDictionaryDefinitions) {
findTermsOptions.excludeDictionaryDefinitions = new Set(findTermsOptions.excludeDictionaryDefinitions);
}
findTermsOptions.textReplacements = findTermsOptions.textReplacements.map((group) => {
if (!group) {
return group;
}
return group.map((opt) => ({...opt, pattern: new RegExp(opt.pattern)}));
});
return this._translator.findTerms(mode, text, findTermsOptions);
}
_getTermFrequenciesHandler({termReadingList, dictionaries}) {
return this._translator.getTermFrequencies(termReadingList, dictionaries);
}
_clearDatabaseCachesHandler() {
return this._translator.clearDatabaseCaches();
}
_onMessage({action, params}, sender, callback) {
const messageHandler = this._messageHandlers.get(action);
if (typeof messageHandler === 'undefined') { return false; }
this._validatePrivilegedMessageSender(sender);
return invokeMessageHandler(messageHandler, params, callback, sender);
}
_validatePrivilegedMessageSender(sender) {
let {url} = sender;
if (typeof url === 'string' && yomichan.isExtensionUrl(url)) { return; }
const {tab} = url;
if (typeof tab === 'object' && tab !== null) {
({url} = tab);
if (typeof url === 'string' && yomichan.isExtensionUrl(url)) { return; }
}
throw new Error('Invalid message sender');
}
}
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