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-rw-r--r--ext/js/background/offscreen-proxy.js172
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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 {deserializeError, isObject} from '../core.js';
+import {ArrayBufferUtil} from '../data/sandbox/array-buffer-util.js';
+
+export class OffscreenProxy {
+ constructor() {
+ this._creatingOffscreen = null;
+ }
+
+ // https://developer.chrome.com/docs/extensions/reference/offscreen/
+ async prepare() {
+ if (await this._hasOffscreenDocument()) {
+ return;
+ }
+ if (this._creatingOffscreen) {
+ await this._creatingOffscreen;
+ return;
+ }
+
+ this._creatingOffscreen = chrome.offscreen.createDocument({
+ url: 'offscreen.html',
+ reasons: ['CLIPBOARD'],
+ justification: 'Access to the clipboard'
+ });
+ await this._creatingOffscreen;
+ this._creatingOffscreen = null;
+ }
+
+ async _hasOffscreenDocument() {
+ const offscreenUrl = chrome.runtime.getURL('offscreen.html');
+ if (!chrome.runtime.getContexts) { // chrome version <116
+ const matchedClients = await clients.matchAll();
+ return await matchedClients.some((client) => client.url === offscreenUrl);
+ }
+
+ const contexts = await chrome.runtime.getContexts({
+ contextTypes: ['OFFSCREEN_DOCUMENT'],
+ documentUrls: [offscreenUrl]
+ });
+ return !!contexts.length;
+ }
+
+ sendMessagePromise(...args) {
+ return new Promise((resolve, reject) => {
+ const callback = (response) => {
+ try {
+ resolve(this._getMessageResponseResult(response));
+ } catch (error) {
+ reject(error);
+ }
+ };
+
+ chrome.runtime.sendMessage(...args, callback);
+ });
+ }
+
+ _getMessageResponseResult(response) {
+ let error = chrome.runtime.lastError;
+ if (error) {
+ throw new Error(error.message);
+ }
+ if (!isObject(response)) {
+ throw new Error('Offscreen document did not respond');
+ }
+ error = response.error;
+ if (error) {
+ throw deserializeError(error);
+ }
+ return response.result;
+ }
+}
+
+export class DictionaryDatabaseProxy {
+ constructor(offscreen) {
+ this._offscreen = offscreen;
+ }
+
+ prepare() {
+ return this._offscreen.sendMessagePromise({action: 'databasePrepareOffscreen'});
+ }
+
+ getDictionaryInfo() {
+ return this._offscreen.sendMessagePromise({action: 'getDictionaryInfoOffscreen'});
+ }
+
+ purge() {
+ return this._offscreen.sendMessagePromise({action: 'databasePurgeOffscreen'});
+ }
+
+ async getMedia(targets) {
+ const serializedMedia = await this._offscreen.sendMessagePromise({action: 'databaseGetMediaOffscreen', params: {targets}});
+ const media = serializedMedia.map((m) => ({...m, content: ArrayBufferUtil.base64ToArrayBuffer(m.content)}));
+ return media;
+ }
+}
+
+export class TranslatorProxy {
+ constructor(offscreen) {
+ this._offscreen = offscreen;
+ }
+
+ prepare(deinflectionReasons) {
+ return this._offscreen.sendMessagePromise({action: 'translatorPrepareOffscreen', params: {deinflectionReasons}});
+ }
+
+ async findKanji(text, findKanjiOptions) {
+ const enabledDictionaryMapList = [...findKanjiOptions.enabledDictionaryMap];
+ const modifiedKanjiOptions = {
+ ...findKanjiOptions,
+ enabledDictionaryMap: enabledDictionaryMapList
+ };
+ return this._offscreen.sendMessagePromise({action: 'findKanjiOffscreen', params: {text, findKanjiOptions: modifiedKanjiOptions}});
+ }
+
+ async findTerms(mode, text, findTermsOptions) {
+ const {enabledDictionaryMap, excludeDictionaryDefinitions, textReplacements} = findTermsOptions;
+ const enabledDictionaryMapList = [...enabledDictionaryMap];
+ const excludeDictionaryDefinitionsList = excludeDictionaryDefinitions ? [...excludeDictionaryDefinitions] : null;
+ const textReplacementsSerialized = textReplacements.map((group) => {
+ if (!group) {
+ return group;
+ }
+ return group.map((opt) => ({...opt, pattern: opt.pattern.toString()}));
+ });
+ const modifiedFindTermsOptions = {
+ ...findTermsOptions,
+ enabledDictionaryMap: enabledDictionaryMapList,
+ excludeDictionaryDefinitions: excludeDictionaryDefinitionsList,
+ textReplacements: textReplacementsSerialized
+ };
+ return this._offscreen.sendMessagePromise({action: 'findTermsOffscreen', params: {mode, text, findTermsOptions: modifiedFindTermsOptions}});
+ }
+
+ async getTermFrequencies(termReadingList, dictionaries) {
+ return this._offscreen.sendMessagePromise({action: 'getTermFrequenciesOffscreen', params: {termReadingList, dictionaries}});
+ }
+
+ clearDatabaseCaches() {
+ return this._offscreen.sendMessagePromise({action: 'clearDatabaseCachesOffscreen'});
+ }
+}
+
+export class ClipboardReaderProxy {
+ constructor(offscreen) {
+ this._offscreen = offscreen;
+ }
+
+ async getText(useRichText) {
+ return this._offscreen.sendMessagePromise({action: 'clipboardGetTextOffscreen', params: {useRichText}});
+ }
+
+ async getImage() {
+ return this._offscreen.sendMessagePromise({action: 'clipboardGetImageOffscreen'});
+ }
+}