yomichan/ext/js/language/dictionary-worker.js

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/*
* Copyright (C) 2021-2022 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/>.
*/
/* global
* DictionaryImporterMediaLoader
*/
class DictionaryWorker {
constructor() {
this._dictionaryImporterMediaLoader = new DictionaryImporterMediaLoader();
}
importDictionary(archiveContent, details, onProgress) {
return this._invoke(
'importDictionary',
{details, archiveContent},
[archiveContent],
onProgress,
this._formatimportDictionaryResult.bind(this)
);
}
deleteDictionary(dictionaryTitle, onProgress) {
return this._invoke('deleteDictionary', {dictionaryTitle}, [], onProgress);
}
getDictionaryCounts(dictionaryNames, getTotal) {
return this._invoke('getDictionaryCounts', {dictionaryNames, getTotal}, [], null);
}
// Private
_invoke(action, params, transfer, onProgress, formatResult) {
return new Promise((resolve, reject) => {
const worker = new Worker('/js/language/dictionary-worker-main.js', {});
const details = {
complete: false,
worker,
resolve,
reject,
onMessage: null,
onProgress,
formatResult
};
const onMessage = this._onMessage.bind(this, details);
details.onMessage = onMessage;
worker.addEventListener('message', onMessage);
worker.postMessage({action, params}, transfer);
});
}
_onMessage(details, e) {
if (details.complete) { return; }
const {action, params} = e.data;
switch (action) {
case 'complete':
{
const {worker, resolve, reject, onMessage, formatResult} = details;
details.complete = true;
details.worker = null;
details.resolve = null;
details.reject = null;
details.onMessage = null;
details.onProgress = null;
details.formatResult = null;
worker.removeEventListener('message', onMessage);
worker.terminate();
this._onMessageComplete(params, resolve, reject, formatResult);
}
break;
case 'progress':
this._onMessageProgress(params, details.onProgress);
break;
case 'getImageDetails':
this._onMessageGetImageDetails(params, details.worker);
break;
}
}
_onMessageComplete(params, resolve, reject, formatResult) {
const {error} = params;
if (typeof error !== 'undefined') {
reject(deserializeError(error));
} else {
let {result} = params;
try {
if (typeof formatResult === 'function') {
result = formatResult(result);
}
} catch (e) {
reject(e);
return;
}
resolve(result);
}
}
_onMessageProgress(params, onProgress) {
if (typeof onProgress !== 'function') { return; }
const {args} = params;
onProgress(...args);
}
async _onMessageGetImageDetails(params, worker) {
const {id, content, mediaType} = params;
const transfer = [];
let response;
try {
const result = await this._dictionaryImporterMediaLoader.getImageDetails(content, mediaType, transfer);
response = {id, result};
} catch (e) {
response = {id, error: serializeError(e)};
}
worker.postMessage({action: 'getImageDetails.response', params: response}, transfer);
}
_formatimportDictionaryResult(result) {
result.errors = result.errors.map((error) => deserializeError(error));
return result;
}
}