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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 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 "HTMLMediaElement.h"
#include "InbandTextTrack.h"
#include "InbandTextTrackPrivate.h"
#include "LoadableTextTrack.h"
#include "TextTrack.h"
using namespace WebCore;
TextTrackList::TextTrackList(HTMLMediaElement* element, ScriptExecutionContext* context)
: TrackListBase(element, context)
{
}
TextTrackList::~TextTrackList()
{
}
unsigned TextTrackList::length() const
{
return m_addTrackTracks.size() + m_elementTracks.size() + m_inbandTracks.size();
}
int TextTrackList::getTrackIndex(TextTrack *textTrack)
{
if (textTrack->trackType() == TextTrack::TrackElement)
return static_cast<LoadableTextTrack*>(textTrack)->trackElementIndex();
if (textTrack->trackType() == TextTrack::AddTrack)
return m_elementTracks.size() + m_addTrackTracks.find(textTrack);
if (textTrack->trackType() == TextTrack::InBand)
return m_elementTracks.size() + m_addTrackTracks.size() + m_inbandTracks.find(textTrack);
ASSERT_NOT_REACHED();
return -1;
}
int TextTrackList::getTrackIndexRelativeToRenderedTracks(TextTrack *textTrack)
{
// Calculate the "Let n be the number of text tracks whose text track mode is showing and that are in the media element's list of text tracks before track."
int trackIndex = 0;
for (size_t i = 0; i < m_elementTracks.size(); ++i) {
if (!toTextTrack(m_elementTracks[i].get())->isRendered())
continue;
if (m_elementTracks[i] == textTrack)
return trackIndex;
++trackIndex;
}
for (size_t i = 0; i < m_addTrackTracks.size(); ++i) {
if (!toTextTrack(m_addTrackTracks[i].get())->isRendered())
continue;
if (m_addTrackTracks[i] == textTrack)
return trackIndex;
++trackIndex;
}
for (size_t i = 0; i < m_inbandTracks.size(); ++i) {
if (!toTextTrack(m_inbandTracks[i].get())->isRendered())
continue;
if (m_inbandTracks[i] == textTrack)
return trackIndex;
++trackIndex;
}
ASSERT_NOT_REACHED();
return -1;
}
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 toTextTrack(m_elementTracks[index].get());
index -= m_elementTracks.size();
if (index < m_addTrackTracks.size())
return toTextTrack(m_addTrackTracks[index].get());
index -= m_addTrackTracks.size();
if (index < m_inbandTracks.size())
return toTextTrack(m_inbandTracks[index].get());
return 0;
}
void TextTrackList::invalidateTrackIndexesAfterTrack(TextTrack* track)
{
Vector<RefPtr<TrackBase> >* tracks = 0;
if (track->trackType() == TextTrack::TrackElement) {
tracks = &m_elementTracks;
for (size_t i = 0; i < m_addTrackTracks.size(); ++i)
toTextTrack(m_addTrackTracks[i].get())->invalidateTrackIndex();
for (size_t i = 0; i < m_inbandTracks.size(); ++i)
toTextTrack(m_inbandTracks[i].get())->invalidateTrackIndex();
} else if (track->trackType() == TextTrack::AddTrack) {
tracks = &m_addTrackTracks;
for (size_t i = 0; i < m_inbandTracks.size(); ++i)
toTextTrack(m_inbandTracks[i].get())->invalidateTrackIndex();
} else if (track->trackType() == TextTrack::InBand)
tracks = &m_inbandTracks;
else
ASSERT_NOT_REACHED();
size_t index = tracks->find(track);
if (index == notFound)
return;
for (size_t i = index; i < tracks->size(); ++i)
toTextTrack(tracks->at(index).get())->invalidateTrackIndex();
}
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 if (track->trackType() == TextTrack::InBand) {
// Insert tracks added for in-band in the media file order.
size_t index = static_cast<InbandTextTrack*>(track.get())->inbandTrackIndex();
m_inbandTracks.insert(index, track);
} else
ASSERT_NOT_REACHED();
invalidateTrackIndexesAfterTrack(track.get());
ASSERT(!track->mediaElement() || track->mediaElement() == mediaElement());
track->setMediaElement(mediaElement());
scheduleAddTrackEvent(track.release());
}
void TextTrackList::remove(TrackBase* track)
{
TextTrack* textTrack = toTextTrack(track);
Vector<RefPtr<TrackBase> >* tracks = 0;
if (textTrack->trackType() == TextTrack::TrackElement)
tracks = &m_elementTracks;
else if (textTrack->trackType() == TextTrack::AddTrack)
tracks = &m_addTrackTracks;
else if (textTrack->trackType() == TextTrack::InBand)
tracks = &m_inbandTracks;
else
ASSERT_NOT_REACHED();
size_t index = tracks->find(track);
if (index == notFound)
return;
invalidateTrackIndexesAfterTrack(textTrack);
ASSERT(!track->mediaElement() || track->mediaElement() == element());
track->setMediaElement(0);
RefPtr<TrackBase> trackRef = (*tracks)[index];
tracks->remove(index);
scheduleRemoveTrackEvent(trackRef.release());
}
bool TextTrackList::contains(TrackBase* track) const
{
const Vector<RefPtr<TrackBase> >* tracks = 0;
TextTrack::TextTrackType type = toTextTrack(track)->trackType();
if (type == TextTrack::TrackElement)
tracks = &m_elementTracks;
else if (type == TextTrack::AddTrack)
tracks = &m_addTrackTracks;
else if (type == TextTrack::InBand)
tracks = &m_inbandTracks;
else
ASSERT_NOT_REACHED();
return tracks->find(track) != notFound;
}
const AtomicString& TextTrackList::interfaceName() const
{
return eventNames().interfaceForTextTrackList;
}
#endif
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