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/*
* Copyright (C) 2021 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
* api
*/
class DisplayAudio {
constructor(display) {
this._display = display;
this._audioPlaying = null;
this._audioSystem = new AudioSystem();
this._autoPlayAudioTimer = null;
this._autoPlayAudioDelay = 400;
this._eventListeners = new EventListenerCollection();
this._cache = new Map();
}
get autoPlayAudioDelay() {
return this._autoPlayAudioDelay;
}
set autoPlayAudioDelay(value) {
this._autoPlayAudioDelay = value;
}
prepare() {
this._audioSystem.prepare();
}
updateOptions(options) {
const data = document.documentElement.dataset;
data.audioEnabled = `${options.audio.enabled && options.audio.sources.length > 0}`;
}
cleanupEntries() {
this._cache.clear();
this.clearAutoPlayTimer();
this._eventListeners.removeAllEventListeners();
}
setupEntry(entry, definitionIndex) {
for (const button of entry.querySelectorAll('.action-play-audio')) {
const expressionIndex = this._getAudioPlayButtonExpressionIndex(button);
this._eventListeners.addEventListener(button, 'click', this._onAudioPlayButtonClick.bind(this, definitionIndex, expressionIndex), false);
}
}
setupEntriesComplete() {
const {audio} = this._display.getOptions();
if (!audio.enabled || !audio.autoPlay) { return; }
this.clearAutoPlayTimer();
const definitions = this._display.definitions;
if (definitions.length === 0) { return; }
const firstDefinition = definitions[0];
if (firstDefinition.type === 'kanji') { return; }
const callback = () => {
this._autoPlayAudioTimer = null;
this.playAudio(0, 0);
};
if (this._autoPlayAudioDelay > 0) {
this._autoPlayAudioTimer = setTimeout(callback, this._autoPlayAudioDelay);
} else {
callback();
}
}
clearAutoPlayTimer() {
if (this._autoPlayAudioTimer === null) { return; }
clearTimeout(this._autoPlayAudioTimer);
this._autoPlayAudioTimer = null;
}
stopAudio() {
if (this._audioPlaying === null) { return; }
this._audioPlaying.pause();
this._audioPlaying = null;
}
async playAudio(definitionIndex, expressionIndex) {
this.stopAudio();
this.clearAutoPlayTimer();
const {definitions} = this._display;
if (definitionIndex < 0 || definitionIndex >= definitions.length) { return; }
const definition = definitions[definitionIndex];
if (definition.type === 'kanji') { return; }
const {expressions} = definition;
if (expressionIndex < 0 || expressionIndex >= expressions.length) { return; }
const {expression, reading} = expressions[expressionIndex];
const {sources, textToSpeechVoice, customSourceUrl, volume} = this._display.getOptions().audio;
const progressIndicatorVisible = this._display.progressIndicatorVisible;
const overrideToken = progressIndicatorVisible.setOverride(true);
try {
// Create audio
let audio;
let title;
const info = await this._createExpressionAudio(sources, expression, reading, {textToSpeechVoice, customSourceUrl});
if (info !== null) {
let source;
({audio, source} = info);
const sourceIndex = sources.indexOf(source);
title = `From source ${1 + sourceIndex}: ${source}`;
} else {
audio = this._audioSystem.getFallbackAudio();
title = 'Could not find audio';
}
// Stop any currently playing audio
this.stopAudio();
// Update details
for (const button of this._getAudioPlayButtons(definitionIndex, expressionIndex)) {
const titleDefault = button.dataset.titleDefault || '';
button.title = `${titleDefault}\n${title}`;
}
// Play
audio.currentTime = 0;
audio.volume = Number.isFinite(volume) ? Math.max(0.0, Math.min(1.0, volume / 100.0)) : 1.0;
const playPromise = audio.play();
this._audioPlaying = audio;
if (typeof playPromise !== 'undefined') {
try {
await playPromise;
} catch (e) {
// NOP
}
}
} finally {
progressIndicatorVisible.clearOverride(overrideToken);
}
}
// Private
_onAudioPlayButtonClick(definitionIndex, expressionIndex, e) {
e.preventDefault();
this.playAudio(definitionIndex, expressionIndex);
}
_getAudioPlayButtonExpressionIndex(button) {
const expressionNode = button.closest('.term-expression');
if (expressionNode !== null) {
const expressionIndex = parseInt(expressionNode.dataset.index, 10);
if (Number.isFinite(expressionIndex)) { return expressionIndex; }
}
return 0;
}
_getAudioPlayButtons(definitionIndex, expressionIndex) {
const results = [];
const {definitionNodes} = this._display;
if (definitionIndex >= 0 && definitionIndex < definitionNodes.length) {
const node = definitionNodes[definitionIndex];
const button1 = (expressionIndex === 0 ? node.querySelector('.action-play-audio') : null);
const button2 = node.querySelector(`.term-expression:nth-of-type(${expressionIndex + 1}) .action-play-audio`);
if (button1 !== null) { results.push(button1); }
if (button2 !== null) { results.push(button2); }
}
return results;
}
async _createExpressionAudio(sources, expression, reading, details) {
const key = JSON.stringify([expression, reading]);
let sourceMap = this._cache.get(key);
if (typeof sourceMap === 'undefined') {
sourceMap = new Map();
this._cache.set(key, sourceMap);
}
for (let i = 0, ii = sources.length; i < ii; ++i) {
const source = sources[i];
let infoListPromise = sourceMap.get(source);
if (typeof infoListPromise === 'undefined') {
infoListPromise = this._getExpressionAudioInfoList(source, expression, reading, details);
sourceMap.set(source, infoListPromise);
}
const infoList = await infoListPromise;
for (let j = 0, jj = infoList.length; j < jj; ++j) {
const item = infoList[j];
let {audioPromise} = item;
if (audioPromise === null) {
audioPromise = this._createAudioFromInfo(item.info, source);
item.audioPromise = audioPromise;
}
let audio;
try {
audio = await audioPromise;
} catch (e) {
continue;
}
return {audio, source, infoListIndex: j};
}
}
return null;
}
async _createAudioFromInfo(info, source) {
switch (info.type) {
case 'url':
return await this._audioSystem.createAudio(info.url, source);
case 'tts':
return this._audioSystem.createTextToSpeechAudio(info.text, info.voice);
default:
throw new Error(`Unsupported type: ${info.type}`);
}
}
async _getExpressionAudioInfoList(source, expression, reading, details) {
const infoList = await api.getExpressionAudioInfoList(source, expression, reading, details);
return infoList.map((info) => ({info, audioPromise: null}));
}
}
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