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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 MediaControllerSupport
{
constructor(mediaController)
{
this.mediaController = mediaController;
this.enable();
}
// Public
enable()
{
for (let eventType of this.mediaEvents)
this.mediaController.media.addEventListener(eventType, this, true);
for (let tracks of this.tracksToMonitor) {
for (let eventType of ["change", "addtrack", "removetrack"])
tracks.addEventListener(eventType, this);
}
if (!this.control)
return;
this.control.uiDelegate = this;
this.syncControl();
}
disable()
{
for (let eventType of this.mediaEvents)
this.mediaController.media.removeEventListener(eventType, this, true);
for (let tracks of this.tracksToMonitor) {
for (let eventType of ["change", "addtrack", "removetrack"])
tracks.removeEventListener(eventType, this);
}
if (this.control)
this.control.uiDelegate = null;
}
// Protected
get control()
{
// Implemented by subclasses.
}
get mediaEvents()
{
// Implemented by subclasses.
return [];
}
get tracksToMonitor()
{
// Implemented by subclasses.
return [];
}
buttonWasPressed(control)
{
// Implemented by subclasses.
}
controlsUserVisibilityDidChange()
{
// Implement by subclasses.
}
handleEvent(event)
{
// Implemented by subclasses.
if (this.control)
this.syncControl(event);
}
syncControl()
{
// Implemented by subclasses.
}
}
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