Move mixed/js (#1383)

* Move mixed/js/core.js to js/core.js

* Move mixed/js/yomichan.js to js/yomichan.js

* Move mixed/js/timer.js to js/debug/timer.js

* Move mixed/js/hotkey-handler.js to js/input/hotkey-handler.js

* Move mixed/js/hotkey-help-controller.js to js/input/hotkey-help-controller.js

* Move mixed/js/hotkey-util.js to js/input/hotkey-util.js

* Move mixed/js/audio-system.js to js/input/audio-system.js

* Move mixed/js/media-loader.js to js/input/media-loader.js

* Move mixed/js/text-to-speech-audio.js to js/input/text-to-speech-audio.js

* Move mixed/js/comm.js to js/comm/cross-frame-api.js

* Move mixed/js/api.js to js/comm/api.js

* Move mixed/js/frame-client.js to js/comm/frame-client.js

* Move mixed/js/frame-endpoint.js to js/comm/frame-endpoint.js

* Move mixed/js/display.js to js/display/display.js

* Move mixed/js/display-audio.js to js/display/display-audio.js

* Move mixed/js/display-generator.js to js/display/display-generator.js

* Move mixed/js/display-history.js to js/display/display-history.js

* Move mixed/js/display-notification.js to js/display/display-notification.js

* Move mixed/js/display-profile-selection.js to js/display/display-profile-selection.js

* Move mixed/js/japanese.js to js/language/japanese-util.js

* Move mixed/js/dictionary-data-util.js to js/language/dictionary-data-util.js

* Move mixed/js/document-focus-controller.js to js/dom/document-focus-controller.js

* Move mixed/js/document-util.js to js/dom/document-util.js

* Move mixed/js/dom-data-binder.js to js/dom/dom-data-binder.js

* Move mixed/js/html-template-collection.js to js/dom/html-template-collection.js

* Move mixed/js/panel-element.js to js/dom/panel-element.js

* Move mixed/js/popup-menu.js to js/dom/popup-menu.js

* Move mixed/js/selector-observer.js to js/dom/selector-observer.js

* Move mixed/js/scroll.js to js/dom/window-scroll.js

* Move mixed/js/text-scanner.js to js/language/text-scanner.js

* Move mixed/js/cache-map.js to js/general/cache-map.js

* Move mixed/js/object-property-accessor.js to js/general/object-property-accessor.js

* Move mixed/js/task-accumulator.js to js/general/task-accumulator.js

* Move mixed/js/environment.js to js/background/environment.js

* Move mixed/js/dynamic-loader.js to js/scripting/dynamic-loader.js

* Move mixed/js/dynamic-loader-sentinel.js to js/scripting/dynamic-loader-sentinel.js

3 files changed, 269 insertions, 0 deletions

diff --git a/ext/js/media/audio-system.js b/ext/js/media/audio-system.js
new file mode 100644
index 00000000..cf63511f
--- /dev/null
+++ b/ext/js/media/audio-system.js
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2019-2021  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
+ * TextToSpeechAudio
+ */
+
+class AudioSystem {
+    constructor() {
+        this._fallbackAudio = null;
+    }
+
+    prepare() {
+        // speechSynthesis.getVoices() will not be populated unless some API call is made.
+        if (typeof speechSynthesis === 'undefined') { return; }
+
+        const eventListeners = new EventListenerCollection();
+        const onVoicesChanged = () => { eventListeners.removeAllEventListeners(); };
+        eventListeners.addEventListener(speechSynthesis, 'voiceschanged', onVoicesChanged, false);
+    }
+
+    getFallbackAudio() {
+        if (this._fallbackAudio === null) {
+            this._fallbackAudio = new Audio('/data/audio/button.mp3');
+        }
+        return this._fallbackAudio;
+    }
+
+    createAudio(url, source) {
+        return new Promise((resolve, reject) => {
+            const audio = new Audio(url);
+            audio.addEventListener('loadeddata', () => {
+                if (!this._isAudioValid(audio, source)) {
+                    reject(new Error('Could not retrieve audio'));
+                } else {
+                    resolve(audio);
+                }
+            });
+            audio.addEventListener('error', () => reject(audio.error));
+        });
+    }
+
+    createTextToSpeechAudio(text, voiceUri) {
+        const voice = this._getTextToSpeechVoiceFromVoiceUri(voiceUri);
+        if (voice === null) {
+            throw new Error('Invalid text-to-speech voice');
+        }
+        return new TextToSpeechAudio(text, voice);
+    }
+
+    // Private
+
+    _isAudioValid(audio, source) {
+        switch (source) {
+            case 'jpod101':
+            {
+                const duration = audio.duration;
+                return (
+                    duration !== 5.694694 && // Invalid audio (Chrome)
+                    duration !== 5.720718 // Invalid audio (Firefox)
+                );
+            }
+            default:
+                return true;
+        }
+    }
+
+    _getTextToSpeechVoiceFromVoiceUri(voiceUri) {
+        try {
+            for (const voice of speechSynthesis.getVoices()) {
+                if (voice.voiceURI === voiceUri) {
+                    return voice;
+                }
+            }
+        } catch (e) {
+            // NOP
+        }
+        return null;
+    }
+}
diff --git a/ext/js/media/media-loader.js b/ext/js/media/media-loader.js
new file mode 100644
index 00000000..5974e31a
--- /dev/null
+++ b/ext/js/media/media-loader.js
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2020-2021  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
+ * api
+ */
+
+class MediaLoader {
+    constructor() {
+        this._token = {};
+        this._mediaCache = new Map();
+        this._loadMediaData = [];
+    }
+
+    async loadMedia(path, dictionaryName, onLoad, onUnload) {
+        const token = this._token;
+        const data = {onUnload, loaded: false};
+
+        this._loadMediaData.push(data);
+
+        const media = await this.getMedia(path, dictionaryName);
+        if (token !== this._token) { return; }
+
+        onLoad(media.url);
+        data.loaded = true;
+    }
+
+    unloadAll() {
+        for (const {onUnload, loaded} of this._loadMediaData) {
+            if (typeof onUnload === 'function') {
+                onUnload(loaded);
+            }
+        }
+        this._loadMediaData = [];
+
+        for (const map of this._mediaCache.values()) {
+            for (const {url} of map.values()) {
+                if (url !== null) {
+                    URL.revokeObjectURL(url);
+                }
+            }
+        }
+        this._mediaCache.clear();
+
+        this._token = {};
+    }
+
+    async getMedia(path, dictionaryName) {
+        let cachedData;
+        let dictionaryCache = this._mediaCache.get(dictionaryName);
+        if (typeof dictionaryCache !== 'undefined') {
+            cachedData = dictionaryCache.get(path);
+        } else {
+            dictionaryCache = new Map();
+            this._mediaCache.set(dictionaryName, dictionaryCache);
+        }
+
+        if (typeof cachedData === 'undefined') {
+            cachedData = {
+                promise: null,
+                data: null,
+                url: null
+            };
+            dictionaryCache.set(path, cachedData);
+            cachedData.promise = this._getMediaData(path, dictionaryName, cachedData);
+        }
+
+        return cachedData.promise;
+    }
+
+    async _getMediaData(path, dictionaryName, cachedData) {
+        const token = this._token;
+        const data = (await api.getMedia([{path, dictionaryName}]))[0];
+        if (token === this._token && data !== null) {
+            const contentArrayBuffer = this._base64ToArrayBuffer(data.content);
+            const blob = new Blob([contentArrayBuffer], {type: data.mediaType});
+            const url = URL.createObjectURL(blob);
+            cachedData.data = data;
+            cachedData.url = url;
+        }
+        return cachedData;
+    }
+
+    _base64ToArrayBuffer(content) {
+        const binaryContent = window.atob(content);
+        const length = binaryContent.length;
+        const array = new Uint8Array(length);
+        for (let i = 0; i < length; ++i) {
+            array[i] = binaryContent.charCodeAt(i);
+        }
+        return array.buffer;
+    }
+}
diff --git a/ext/js/media/text-to-speech-audio.js b/ext/js/media/text-to-speech-audio.js
new file mode 100644
index 00000000..a32916f4
--- /dev/null
+++ b/ext/js/media/text-to-speech-audio.js
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2020-2021  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/>.
+ */
+
+class TextToSpeechAudio {
+    constructor(text, voice) {
+        this._text = text;
+        this._voice = voice;
+        this._utterance = null;
+        this._volume = 1;
+    }
+
+    get currentTime() {
+        return 0;
+    }
+
+    set currentTime(value) {
+        // NOP
+    }
+
+    get volume() {
+        return this._volume;
+    }
+
+    set volume(value) {
+        this._volume = value;
+        if (this._utterance !== null) {
+            this._utterance.volume = value;
+        }
+    }
+
+    async play() {
+        try {
+            if (this._utterance === null) {
+                this._utterance = new SpeechSynthesisUtterance(typeof this._text === 'string' ? this._text : '');
+                this._utterance.lang = 'ja-JP';
+                this._utterance.volume = this._volume;
+                this._utterance.voice = this._voice;
+            }
+
+            speechSynthesis.cancel();
+            speechSynthesis.speak(this._utterance);
+        } catch (e) {
+            // NOP
+        }
+    }
+
+    pause() {
+        try {
+            speechSynthesis.cancel();
+        } catch (e) {
+            // NOP
+        }
+    }
+}