1 files changed, 234 insertions, 0 deletions
diff --git a/ext/bg/js/settings/audio-controller.js b/ext/bg/js/settings/audio-controller.js
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+++ b/ext/bg/js/settings/audio-controller.js
@@ -0,0 +1,234 @@
+/*
+ * 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);
+    }
+}