yomichan/ext/mixed/js/display-audio.js
2021-01-23 15:11:10 -05:00

317 lines
11 KiB
JavaScript

/*
* 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 audioOptions = this._getAudioOptions();
if (!audioOptions.enabled || !audioOptions.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, sources=null, sourceDetailsMap=null) {
this.stopAudio();
this.clearAutoPlayTimer();
const expressionReading = this._getExpressionAndReading(definitionIndex, expressionIndex);
if (expressionReading === null) { return; }
const {expression, reading} = expressionReading;
const audioOptions = this._getAudioOptions();
const {textToSpeechVoice, customSourceUrl, volume} = audioOptions;
if (!Array.isArray(sources)) {
({sources} = audioOptions);
}
if (!(sourceDetailsMap instanceof Map)) {
sourceDetailsMap = null;
}
const progressIndicatorVisible = this._display.progressIndicatorVisible;
const overrideToken = progressIndicatorVisible.setOverride(true);
try {
// Create audio
let audio;
let title;
const info = await this._createExpressionAudio(sources, sourceDetailsMap, 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, sourceDetailsMap, expression, reading, details) {
const key = this._getExpressionReadingKey(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;
let sourceInfo = sourceMap.get(source);
if (typeof sourceInfo === 'undefined') {
infoListPromise = this._getExpressionAudioInfoList(source, expression, reading, details);
sourceInfo = {infoListPromise, infoList: null};
sourceMap.set(source, sourceInfo);
}
let {infoList} = sourceInfo;
if (infoList === null) {
infoList = await infoListPromise;
sourceInfo.infoList = infoList;
}
let start = 0;
let end = infoList.length;
if (sourceDetailsMap !== null) {
const sourceDetails = sourceDetailsMap.get(source);
if (typeof sourceDetails !== 'undefined') {
const {start: start2, end: end2} = sourceDetails;
if (this._isInteger(start2)) { start = this._clamp(start2, start, end); }
if (this._isInteger(end2)) { end = this._clamp(end2, start, end); }
}
}
const audio = await this._createAudioFromInfoList(source, infoList, start, end);
if (audio !== null) { return audio; }
}
return null;
}
async _createAudioFromInfoList(source, infoList, start, end) {
for (let i = start; i < end; ++i) {
const item = infoList[i];
let {audio, audioResolved} = item;
if (!audioResolved) {
let {audioPromise} = item;
if (audioPromise === null) {
audioPromise = this._createAudioFromInfo(item.info, source);
item.audioPromise = audioPromise;
}
try {
audio = await audioPromise;
} catch (e) {
continue;
} finally {
item.audioResolved = true;
}
item.audio = audio;
}
if (audio === null) { continue; }
return {audio, source, infoListIndex: i};
}
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, audio: null}));
}
_getExpressionAndReading(definitionIndex, expressionIndex) {
const {definitions} = this._display;
if (definitionIndex < 0 || definitionIndex >= definitions.length) { return null; }
const definition = definitions[definitionIndex];
if (definition.type === 'kanji') { return null; }
const {expressions} = definition;
if (expressionIndex < 0 || expressionIndex >= expressions.length) { return null; }
const {expression, reading} = expressions[expressionIndex];
return {expression, reading};
}
_getExpressionReadingKey(expression, reading) {
return JSON.stringify([expression, reading]);
}
_getAudioOptions() {
return this._display.getOptions().audio;
}
_isInteger(value) {
return (
typeof value === 'number' &&
Number.isFinite(value) &&
Math.floor(value) === value
);
}
_clamp(value, min, max) {
return Math.max(min, Math.min(max, value));
}
}