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/*
* Copyright (C) 2011, 2012 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.
*/
#include "config.h"
#if ENABLE(VIDEO_TRACK)
#include "TrackListBase.h"
#include "EventNames.h"
#include "HTMLMediaElement.h"
#include "ScriptExecutionContext.h"
#include "TrackEvent.h"
using namespace WebCore;
TrackListBase::TrackListBase(HTMLMediaElement* element, ScriptExecutionContext* context)
: m_context(context)
, m_element(element)
, m_asyncEventQueue(*this)
{
ASSERT(context->isDocument());
}
TrackListBase::~TrackListBase()
{
clearElement();
}
void TrackListBase::clearElement()
{
m_element = nullptr;
for (auto& track : m_inbandTracks) {
track->setMediaElement(nullptr);
track->clearClient();
}
}
Element* TrackListBase::element() const
{
return m_element;
}
unsigned TrackListBase::length() const
{
return m_inbandTracks.size();
}
void TrackListBase::remove(TrackBase& track, bool scheduleEvent)
{
size_t index = m_inbandTracks.find(&track);
if (index == notFound)
return;
if (track.mediaElement()) {
ASSERT(track.mediaElement() == m_element);
track.setMediaElement(nullptr);
}
Ref<TrackBase> trackRef = *m_inbandTracks[index];
m_inbandTracks.remove(index);
if (scheduleEvent)
scheduleRemoveTrackEvent(WTFMove(trackRef));
}
bool TrackListBase::contains(TrackBase& track) const
{
return m_inbandTracks.find(&track) != notFound;
}
void TrackListBase::scheduleTrackEvent(const AtomicString& eventName, Ref<TrackBase>&& track)
{
m_asyncEventQueue.enqueueEvent(TrackEvent::create(eventName, false, false, WTFMove(track)));
}
void TrackListBase::scheduleAddTrackEvent(Ref<TrackBase>&& track)
{
// 4.8.10.5 Loading the media resource
// ...
// Fire a trusted 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 new AudioTrack object, at this
// AudioTrackList object.
// ...
// Fire a trusted 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 new VideoTrack object, at this
// VideoTrackList object.
// 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.
scheduleTrackEvent(eventNames().addtrackEvent, WTFMove(track));
}
void TrackListBase::scheduleRemoveTrackEvent(Ref<TrackBase>&& track)
{
// 4.8.10.6 Offsets into the media resource
// If at any time the user agent learns that an audio or video track has
// ended and all media data relating to that track corresponds to parts of
// the media timeline that are before the earliest possible position, the
// user agent may queue a task to remove the track from the audioTracks
// attribute's AudioTrackList object or the videoTracks attribute's
// VideoTrackList object as appropriate and then fire a trusted event
// with the name removetrack, that does not bubble and is not cancelable,
// and that uses the TrackEvent interface, with the track attribute
// initialized to the AudioTrack or VideoTrack object representing the
// track, at the media element's aforementioned AudioTrackList or
// VideoTrackList object.
// 4.8.10.12.3 Sourcing out-of-band text tracks
// When a track element's parent element changes and the old parent was a
// media element, then the user agent must remove the track element's
// corresponding text track from the media element's list of text tracks,
// and then queue a task to fire a trusted event with the name removetrack,
// 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.
scheduleTrackEvent(eventNames().removetrackEvent, WTFMove(track));
}
void TrackListBase::scheduleChangeEvent()
{
// 4.8.10.6 Offsets into the media resource
// Whenever an audio track in an AudioTrackList is enabled or disabled, the
// user agent must queue a task to fire a simple event named change at the
// AudioTrackList object.
// ...
// Whenever a track in a VideoTrackList that was previously not selected is
// selected, the user agent must queue a task to fire a simple event named
// change at the VideoTrackList object.
m_asyncEventQueue.enqueueEvent(Event::create(eventNames().changeEvent, false, false));
}
bool TrackListBase::isAnyTrackEnabled() const
{
for (auto& track : m_inbandTracks) {
if (track->enabled())
return true;
}
return false;
}
#endif
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