Add UI for editing audio playback sources

1 files changed, 131 insertions, 0 deletions

diff --git a/ext/bg/js/audio-ui.js b/ext/bg/js/audio-ui.js
new file mode 100644
index 00000000..381129ac
--- /dev/null
+++ b/ext/bg/js/audio-ui.js
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2019  Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+
+class AudioSourceUI {
+    static instantiateTemplate(templateSelector) {
+        const template = document.querySelector(templateSelector);
+        const content = document.importNode(template.content, true);
+        return $(content.firstChild);
+    }
+}
+
+AudioSourceUI.Container = class Container {
+    constructor(audioSources, container, addButton) {
+        this.audioSources = audioSources;
+        this.container = container;
+        this.addButton = addButton;
+        this.children = [];
+
+        this.container.empty();
+
+        for (const audioSource of toIterable(audioSources)) {
+            this.children.push(new AudioSourceUI.AudioSource(this, audioSource, this.children.length));
+        }
+
+        this.addButton.on('click', () => this.onAddAudioSource());
+    }
+
+    cleanup() {
+        for (const child of this.children) {
+            child.cleanup();
+        }
+
+        this.addButton.off('click');
+        this.container.empty();
+    }
+
+    save() {
+        // Override
+    }
+
+    remove(child) {
+        const index = this.children.indexOf(child);
+        if (index < 0) {
+            return;
+        }
+
+        child.cleanup();
+        this.children.splice(index, 1);
+        this.audioSources.splice(index, 1);
+
+        for (let i = index; i < this.children.length; ++i) {
+            this.children[i].index = i;
+        }
+    }
+
+    onAddAudioSource() {
+        const audioSource = this.getUnusedAudioSource();
+        this.audioSources.push(audioSource);
+        this.save();
+        this.children.push(new AudioSourceUI.AudioSource(this, audioSource, this.children.length));
+    }
+
+    getUnusedAudioSource() {
+        const audioSourcesAvailable = [
+            'jpod101',
+            'jpod101-alternate',
+            'jisho',
+            'custom'
+        ];
+        for (const source of audioSourcesAvailable) {
+            if (this.audioSources.indexOf(source) < 0) {
+                return source;
+            }
+        }
+        return audioSourcesAvailable[0];
+    }
+};
+
+AudioSourceUI.AudioSource = class AudioSource {
+    constructor(parent, audioSource, index) {
+        this.parent = parent;
+        this.audioSource = audioSource;
+        this.index = index;
+
+        this.container = AudioSourceUI.instantiateTemplate('#audio-source-template').appendTo(parent.container);
+        this.select = this.container.find('.audio-source-select');
+        this.removeButton = this.container.find('.audio-source-remove');
+
+        this.select.val(audioSource);
+
+        this.select.on('change', () => this.onSelectChanged());
+        this.removeButton.on('click', () => this.onRemoveClicked());
+    }
+
+    cleanup() {
+        this.select.off('change');
+        this.removeButton.off('click');
+        this.container.remove();
+    }
+
+    save() {
+        this.parent.save();
+    }
+
+    onSelectChanged() {
+        this.audioSource = this.select.val();
+        this.parent.audioSources[this.index] = this.audioSource;
+        this.save();
+    }
+
+    onRemoveClicked() {
+        this.parent.remove(this);
+        this.save();
+    }
+};