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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 = new AudioSystem({
cacheSize: 0
});
this._audioSourceContainer = null;
this._audioSourceAddButton = null;
this._audioSourceEntries = [];
}
async prepare() {
this._audioSystem.prepare();
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);
}
}
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