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/*
* 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
{
// 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.showMediaControlsContextMenu(control, {
promoteSubMenus: this.mediaController.layoutTraits.promoteSubMenusWhenShowingMediaControlsContextMenu(),
});
}
syncControl()
{
this.control.enabled = this.mediaController.canShowMediaControlsContextMenu && (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 this.mediaController.host ? this.mediaController.host.sortedTrackListForMenu(tracks) : Array.from(tracks);
}
}
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