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/*
* 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
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(VIDEO_TRACK)
#include "TextTrackList.h"
#include "EventNames.h"
#include "LoadableTextTrack.h"
#include "ScriptExecutionContext.h"
#include "TextTrack.h"
#include "TrackEvent.h"
using namespace WebCore;
TextTrackList::TextTrackList(HTMLMediaElement* owner, ScriptExecutionContext* context)
: m_context(context)
, m_owner(owner)
, m_pendingEventTimer(this, &TextTrackList::asyncEventTimerFired)
, m_dispatchingEvents(0)
{
ASSERT(context->isDocument());
}
TextTrackList::~TextTrackList()
{
}
unsigned TextTrackList::length() const
{
return m_addTrackTracks.size() + m_elementTracks.size();
}
TextTrack* TextTrackList::item(unsigned index)
{
// 4.8.10.12.1 Text track model
// The text tracks are sorted as follows:
// 1. The text tracks corresponding to track element children of the media element, in tree order.
// 2. Any text tracks added using the addTextTrack() method, in the order they were added, oldest first.
// 3. Any media-resource-specific text tracks (text tracks corresponding to data in the media
// resource), in the order defined by the media resource's format specification.
if (index < m_elementTracks.size())
return m_elementTracks[index].get();
index -= m_elementTracks.size();
if (index < m_addTrackTracks.size())
return m_addTrackTracks[index].get();
return 0;
}
void TextTrackList::append(PassRefPtr<TextTrack> prpTrack)
{
RefPtr<TextTrack> track = prpTrack;
if (track->trackType() == TextTrack::AddTrack)
m_addTrackTracks.append(track);
else if (track->trackType() == TextTrack::TrackElement) {
// Insert tracks added for <track> element in tree order.
size_t index = static_cast<LoadableTextTrack*>(track.get())->trackElementIndex();
m_elementTracks.insert(index, track);
} else
ASSERT_NOT_REACHED();
ASSERT(!track->mediaElement() || track->mediaElement() == owner());
track->setMediaElement(owner());
scheduleAddTrackEvent(track.release());
}
void TextTrackList::remove(TextTrack* track)
{
Vector<RefPtr<TextTrack> >* tracks = 0;
if (track->trackType() == TextTrack::TrackElement)
tracks = &m_elementTracks;
else if (track->trackType() == TextTrack::AddTrack)
tracks = &m_addTrackTracks;
else
ASSERT_NOT_REACHED();
size_t index = tracks->find(track);
if (index == notFound)
return;
ASSERT(track->mediaElement() == owner());
track->setMediaElement(0);
tracks->remove(index);
}
const AtomicString& TextTrackList::interfaceName() const
{
return eventNames().interfaceForTextTrackList;
}
void TextTrackList::scheduleAddTrackEvent(PassRefPtr<TextTrack> track)
{
// 4.8.10.12.3 Sourcing out-of-band text tracks
// 4.8.10.12.3 Sourcing out-of-band text tracks
// 4.8.10.12.4 Text track API
// ... then queue a task to fire an event with the name addtrack, that does not
// bubble and is not cancelable, and that uses the TrackEvent interface, with
// the track attribute initialized to the text track's TextTrack object, at
// the media element's textTracks attribute's TextTrackList object.
RefPtr<TextTrack> trackRef = track;
TrackEventInit initializer;
initializer.track = trackRef;
initializer.bubbles = false;
initializer.cancelable = false;
m_pendingEvents.append(TrackEvent::create(eventNames().addtrackEvent, initializer));
if (!m_pendingEventTimer.isActive())
m_pendingEventTimer.startOneShot(0);
}
void TextTrackList::asyncEventTimerFired(Timer<TextTrackList>*)
{
Vector<RefPtr<Event> > pendingEvents;
ExceptionCode ec = 0;
++m_dispatchingEvents;
m_pendingEvents.swap(pendingEvents);
size_t count = pendingEvents.size();
for (size_t index = 0; index < count; ++index)
dispatchEvent(pendingEvents[index].release(), ec);
--m_dispatchingEvents;
}
#endif
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