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+/*
+ * Copyright (C) 2019-2020 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
+ * AudioSystem
+ */
+
+class AudioController {
+ constructor(settingsController) {
+ this._settingsController = settingsController;
+ this._audioSystem = null;
+ this._audioSourceContainer = null;
+ this._audioSourceAddButton = null;
+ this._audioSourceEntries = [];
+ }
+
+ async prepare() {
+ this._audioSystem = new AudioSystem({
+ audioUriBuilder: null,
+ useCache: true
+ });
+
+ this._audioSourceContainer = document.querySelector('.audio-source-list');
+ this._audioSourceAddButton = document.querySelector('.audio-source-add');
+ this._audioSourceContainer.textContent = '';
+
+ this._audioSourceAddButton.addEventListener('click', this._onAddAudioSource.bind(this), false);
+
+ this._prepareTextToSpeech();
+
+ this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
+
+ const options = await this._settingsController.getOptions();
+ this._onOptionsChanged({options});
+ }
+
+ // Private
+
+ _onOptionsChanged({options}) {
+ for (let i = this._audioSourceEntries.length - 1; i >= 0; --i) {
+ this._cleanupAudioSourceEntry(i);
+ }
+
+ for (const audioSource of options.audio.sources) {
+ this._createAudioSourceEntry(audioSource);
+ }
+ }
+
+ _prepareTextToSpeech() {
+ if (typeof speechSynthesis === 'undefined') { return; }
+
+ speechSynthesis.addEventListener('voiceschanged', this._updateTextToSpeechVoices.bind(this), false);
+ this._updateTextToSpeechVoices();
+
+ document.querySelector('#text-to-speech-voice').addEventListener('change', this._onTextToSpeechVoiceChange.bind(this), false);
+ document.querySelector('#text-to-speech-voice-test').addEventListener('click', this._testTextToSpeech.bind(this), false);
+ }
+
+ _updateTextToSpeechVoices() {
+ const voices = Array.prototype.map.call(speechSynthesis.getVoices(), (voice, index) => ({voice, index}));
+ voices.sort(this._textToSpeechVoiceCompare.bind(this));
+
+ document.querySelector('#text-to-speech-voice-container').hidden = (voices.length === 0);
+
+ const fragment = document.createDocumentFragment();
+
+ let option = document.createElement('option');
+ option.value = '';
+ option.textContent = 'None';
+ fragment.appendChild(option);
+
+ for (const {voice} of voices) {
+ option = document.createElement('option');
+ option.value = voice.voiceURI;
+ option.textContent = `${voice.name} (${voice.lang})`;
+ fragment.appendChild(option);
+ }
+
+ const select = document.querySelector('#text-to-speech-voice');
+ select.textContent = '';
+ select.appendChild(fragment);
+ select.value = select.dataset.value;
+ }
+
+ _textToSpeechVoiceCompare(a, b) {
+ const aIsJapanese = this._languageTagIsJapanese(a.voice.lang);
+ const bIsJapanese = this._languageTagIsJapanese(b.voice.lang);
+ if (aIsJapanese) {
+ if (!bIsJapanese) { return -1; }
+ } else {
+ if (bIsJapanese) { return 1; }
+ }
+
+ const aIsDefault = a.voice.default;
+ const bIsDefault = b.voice.default;
+ if (aIsDefault) {
+ if (!bIsDefault) { return -1; }
+ } else {
+ if (bIsDefault) { return 1; }
+ }
+
+ return a.index - b.index;
+ }
+
+ _languageTagIsJapanese(languageTag) {
+ return (
+ languageTag.startsWith('ja_') ||
+ languageTag.startsWith('ja-') ||
+ languageTag.startsWith('jpn-')
+ );
+ }
+
+ _testTextToSpeech() {
+ try {
+ const text = document.querySelector('#text-to-speech-voice-test').dataset.speechText || '';
+ const voiceUri = document.querySelector('#text-to-speech-voice').value;
+
+ const audio = this._audioSystem.createTextToSpeechAudio(text, voiceUri);
+ audio.volume = 1.0;
+ audio.play();
+ } catch (e) {
+ // NOP
+ }
+ }
+
+ _instantiateTemplate(templateSelector) {
+ const template = document.querySelector(templateSelector);
+ const content = document.importNode(template.content, true);
+ return content.firstChild;
+ }
+
+ _getUnusedAudioSource() {
+ const audioSourcesAvailable = [
+ 'jpod101',
+ 'jpod101-alternate',
+ 'jisho',
+ 'custom'
+ ];
+ for (const source of audioSourcesAvailable) {
+ if (!this._audioSourceEntries.some((metadata) => metadata.value === source)) {
+ return source;
+ }
+ }
+ return audioSourcesAvailable[0];
+ }
+
+ _createAudioSourceEntry(value) {
+ const eventListeners = new EventListenerCollection();
+ const container = this._instantiateTemplate('#audio-source-template');
+ const select = container.querySelector('.audio-source-select');
+ const removeButton = container.querySelector('.audio-source-remove');
+
+ select.value = value;
+
+ const entry = {
+ container,
+ eventListeners,
+ value
+ };
+
+ eventListeners.addEventListener(select, 'change', this._onAudioSourceSelectChange.bind(this, entry), false);
+ eventListeners.addEventListener(removeButton, 'click', this._onAudioSourceRemoveClicked.bind(this, entry), false);
+
+ this._audioSourceContainer.appendChild(container);
+ this._audioSourceEntries.push(entry);
+ }
+
+ async _removeAudioSourceEntry(entry) {
+ const index = this._audioSourceEntries.indexOf(entry);
+ if (index < 0) { return; }
+
+ this._cleanupAudioSourceEntry(index);
+ await this._settingsController.modifyProfileSettings([{
+ action: 'splice',
+ path: 'audio.sources',
+ start: index,
+ deleteCount: 1,
+ items: []
+ }]);
+ }
+
+ _cleanupAudioSourceEntry(index) {
+ const {container, eventListeners} = this._audioSourceEntries[index];
+ if (container.parentNode !== null) {
+ container.parentNode.removeChild(container);
+ }
+ eventListeners.removeAllEventListeners();
+ this._audioSourceEntries.splice(index, 1);
+ }
+
+ _onTextToSpeechVoiceChange(e) {
+ e.currentTarget.dataset.value = e.currentTarget.value;
+ }
+
+ async _onAddAudioSource() {
+ const audioSource = this._getUnusedAudioSource();
+ const index = this._audioSourceEntries.length;
+ this._createAudioSourceEntry(audioSource);
+ await this._settingsController.modifyProfileSettings([{
+ action: 'splice',
+ path: 'audio.sources',
+ start: index,
+ deleteCount: 0,
+ items: [audioSource]
+ }]);
+ }
+
+ async _onAudioSourceSelectChange(entry, event) {
+ const index = this._audioSourceEntries.indexOf(entry);
+ if (index < 0) { return; }
+
+ const value = event.currentTarget.value;
+ entry.value = value;
+ await this._settingsController.setProfileSetting(`audio.sources[${index}]`, value);
+ }
+
+ async _onAudioSourceRemoveClicked(entry) {
+ await this._removeAudioSourceEntry(entry);
+ }
+}