1 files changed, 150 insertions, 0 deletions
diff --git a/Source/WebCore/Modules/modern-media-controls/media/tracks-support.js b/Source/WebCore/Modules/modern-media-controls/media/tracks-support.js
new file mode 100644
index 000000000..d0bdf4b99
--- /dev/null
+++ b/Source/WebCore/Modules/modern-media-controls/media/tracks-support.js
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+class TracksSupport extends MediaControllerSupport
+{
+
+    constructor(mediaController)
+    {
+        super(mediaController);
+
+        if (!this.control)
+            return;
+
+        this.mediaController.controls.tracksPanel.dataSource = this;
+        this.mediaController.controls.tracksPanel.uiDelegate = this;
+    }
+
+    // Protected
+
+    get control()
+    {
+        return this.mediaController.controls.tracksButton;
+    }
+
+    get mediaEvents()
+    {
+        return ["loadedmetadata"];
+    }
+
+    get tracksToMonitor()
+    {
+        return [this.mediaController.media.audioTracks, this.mediaController.media.textTracks];
+    }
+
+    buttonWasPressed(control)
+    {
+        this.mediaController.controls.showTracksPanel();
+    }
+
+    tracksPanelNumberOfSections()
+    {
+        let numberOfSections = 0;
+        if (this._canPickAudioTracks())
+            numberOfSections++;
+        if (this._canPickTextTracks())
+            numberOfSections++;
+        return numberOfSections;
+    }
+
+    tracksPanelTitleForSection(sectionIndex)
+    {
+        if (sectionIndex == 0 && this._canPickAudioTracks())
+            return UIString("Audio");
+        return UIString("Subtitles");
+    }
+
+    tracksPanelNumberOfTracksInSection(sectionIndex)
+    {
+        if (sectionIndex == 0 && this._canPickAudioTracks())
+            return this._audioTracks().length;
+        return this._textTracks().length;
+    }
+
+    tracksPanelTitleForTrackInSection(trackIndex, sectionIndex)
+    {
+        let track;
+        if (sectionIndex == 0 && this._canPickAudioTracks())
+            track = this._audioTracks()[trackIndex];
+        else
+            track = this._textTracks()[trackIndex];
+
+        if (this.mediaController.host)
+            return this.mediaController.host.displayNameForTrack(track);
+        return track.label;
+    }
+
+    tracksPanelIsTrackInSectionSelected(trackIndex, sectionIndex)
+    {
+        if (sectionIndex == 0 && this._canPickAudioTracks())
+            return this._audioTracks()[trackIndex].enabled;
+        return this._textTracks()[trackIndex].mode !== "disabled";
+    }
+
+    tracksPanelSelectionDidChange(trackIndex, sectionIndex)
+    {
+        if (sectionIndex == 0 && this._canPickAudioTracks())
+            this._audioTracks().forEach((audioTrack, index) => audioTrack.enabled = index === trackIndex);
+        else
+            this._textTracks().forEach((textTrack, index) => textTrack.mode = index === trackIndex ? "showing" : "disabled");
+
+        this.mediaController.controls.hideTracksPanel();
+    }
+
+    syncControl()
+    {
+        this.control.enabled = this._canPickAudioTracks() || this._canPickTextTracks();
+    }
+
+    // Private
+
+    _textTracks()
+    {
+        return this._sortedTrackList(this.mediaController.media.textTracks);
+    }
+
+    _audioTracks()
+    {
+        return this._sortedTrackList(this.mediaController.media.audioTracks);
+    }
+
+    _canPickAudioTracks()
+    {
+        const audioTracks = this._audioTracks();
+        return audioTracks && audioTracks.length > 1;
+    }
+
+    _canPickTextTracks()
+    {
+        const textTracks = this._textTracks();
+        return textTracks && textTracks.length > 0;
+    }
+
+    _sortedTrackList(tracks)
+    {
+        return Array.from(this.mediaController.host ? this.mediaController.host.sortedTrackListForMenu(tracks) : tracks);
+    }
+
+}