third_party/WebKit/Source/core/html/track/TrackEvent.cpp

/*
 * Copyright (C) 2011 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 COMPUTER, 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 COMPUTER, 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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "core/html/track/TrackEvent.h"

#include "bindings/core/v8/UnionTypesCore.h"
#include "core/html/track/AudioTrack.h"
#include "core/html/track/TextTrack.h"
#include "core/html/track/VideoTrack.h"
#include "public/platform/WebMediaPlayer.h"

namespace blink {

TrackEvent::TrackEvent()
{
}

TrackEvent::TrackEvent(const AtomicString& type, const TrackEventInit& initializer)
    : Event(type, initializer)
{
    if (!initializer.hasTrack())
        return;

    const VideoTrackOrAudioTrackOrTextTrack& track = initializer.track();
    if (track.isVideoTrack())
        m_track = track.getAsVideoTrack();
    else if (track.isAudioTrack())
        m_track = track.getAsAudioTrack();
    else if (track.isTextTrack())
        m_track = track.getAsTextTrack();
    else
        ASSERT_NOT_REACHED();
}

TrackEvent::~TrackEvent()
{
}

const AtomicString& TrackEvent::interfaceName() const
{
    return EventNames::TrackEvent;
}

void TrackEvent::track(VideoTrackOrAudioTrackOrTextTrack& returnValue)
{
    if (!m_track)
        return;

    switch (m_track->type()) {
    case WebMediaPlayer::TextTrack:
        returnValue.setTextTrack(toTextTrack(m_track.get()));
        break;
    case WebMediaPlayer::AudioTrack:
        returnValue.setAudioTrack(toAudioTrack(m_track.get()));
        break;
    case WebMediaPlayer::VideoTrack:
        returnValue.setVideoTrack(toVideoTrack(m_track.get()));
        break;
    default:
        ASSERT_NOT_REACHED();
    }
}

DEFINE_TRACE(TrackEvent)
{
    visitor->trace(m_track);
    Event::trace(visitor);
}

} // namespace blink