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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 ScrubbingSupport extends MediaControllerSupport
{
// Protected
get control()
{
return this.mediaController.controls.timeControl.scrubber;
}
get mediaEvents()
{
return ["progress"];
}
controlValueWillStartChanging(control)
{
const media = this.mediaController.media;
const isPaused = media.paused;
if (!isPaused)
media.pause();
this._wasPausedWhenScrubbingStarted = isPaused;
}
controlValueDidChange(control)
{
const media = this.mediaController.media;
const seekTime = control.value * media.duration;
this._targetSeekTime = seekTime;
media.fastSeek(seekTime);
this.mediaController.controls.timeControl.currentTime = seekTime;
}
controlValueDidStopChanging(control)
{
const media = this.mediaController.media;
if (this._targetSeekTime && media.currentTime != this._targetSeekTime)
media.currentTime = this._targetSeekTime;
delete this._targetSeekTime;
if (!this._wasPausedWhenScrubbingStarted)
this.mediaController.media.play();
delete this._wasPausedWhenScrubbingStarted;
}
syncControl()
{
const media = this.mediaController.media;
if (isNaN(media.duration))
return;
// Let's find the buffered time range containing the current time and
// set the scrubber's secondary value to the end of that range.
const endTimeForBufferedRangeContainingCurrentTime = () => {
const ranges = media.buffered;
const currentTime = media.currentTime;
for (let i = 0; i < ranges.length; ++i) {
if (currentTime < ranges.start(i))
continue;
const end = ranges.end(i);
if (currentTime <= end)
return end;
}
return 0;
}
this.control.secondaryValue = endTimeForBufferedRangeContainingCurrentTime() / media.duration;
}
}
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