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/*
* Copyright (C) 2011 Google 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"
#include "core/html/track/LoadableTextTrack.h"
#include "core/html/HTMLTrackElement.h"
#include "core/html/track/TextTrackCueList.h"
#include "core/html/track/vtt/VTTRegionList.h"
namespace WebCore {
LoadableTextTrack::LoadableTextTrack(HTMLTrackElement* track)
: TextTrack(track->document(), track, emptyAtom, emptyAtom, emptyAtom, emptyAtom, TrackElement)
, m_trackElement(track)
, m_loadTimer(this, &LoadableTextTrack::loadTimerFired)
, m_isDefault(false)
{
}
LoadableTextTrack::~LoadableTextTrack()
{
}
void LoadableTextTrack::clearClient()
{
m_trackElement = 0;
TextTrack::clearClient();
}
void LoadableTextTrack::scheduleLoad(const KURL& url)
{
if (url == m_url) {
// If loading of the resource from this URL is in progress, return early.
ASSERT(m_loader && m_trackElement);
if (m_loader->loadState() < TextTrackLoader::Finished)
return;
// The track element might have changed its state to HTMLTrackElement::Loading
// waiting for a call to didCompleteLoad to continue.
cueLoadingCompleted(m_loader.get(), m_loader->loadState() == TextTrackLoader::Failed);
return;
}
// 4.8.10.12.3 Sourcing out-of-band text tracks (continued)
// 2. Let URL be the track URL of the track element.
m_url = url;
// 3. Asynchronously run the remaining steps, while continuing with whatever task
// was responsible for creating the text track or changing the text track mode.
if (!m_loadTimer.isActive())
m_loadTimer.startOneShot(0);
}
void LoadableTextTrack::loadTimerFired(Timer<LoadableTextTrack>*)
{
if (m_loader)
m_loader->cancelLoad();
if (!m_trackElement)
return;
// 4.8.10.12.3 Sourcing out-of-band text tracks (continued)
// 4. Download: If URL is not the empty string, perform a potentially CORS-enabled fetch of URL, with the
// mode being the state of the media element's crossorigin content attribute, the origin being the
// origin of the media element's Document, and the default origin behaviour set to fail.
m_loader = TextTrackLoader::create(*this, m_trackElement->document());
if (!m_loader->load(m_url, m_trackElement->mediaElementCrossOriginAttribute()))
m_trackElement->didCompleteLoad(HTMLTrackElement::Failure);
}
void LoadableTextTrack::newCuesAvailable(TextTrackLoader* loader)
{
ASSERT_UNUSED(loader, m_loader == loader);
Vector<RefPtr<VTTCue> > newCues;
m_loader->getNewCues(newCues);
if (!m_cues)
m_cues = TextTrackCueList::create();
for (size_t i = 0; i < newCues.size(); ++i) {
newCues[i]->setTrack(this);
m_cues->add(newCues[i]);
}
if (client())
client()->textTrackAddCues(this, m_cues.get());
}
void LoadableTextTrack::cueLoadingCompleted(TextTrackLoader* loader, bool loadingFailed)
{
ASSERT_UNUSED(loader, m_loader == loader);
if (!m_trackElement)
return;
m_trackElement->didCompleteLoad(loadingFailed ? HTMLTrackElement::Failure : HTMLTrackElement::Success);
}
void LoadableTextTrack::newRegionsAvailable(TextTrackLoader* loader)
{
ASSERT_UNUSED(loader, m_loader == loader);
Vector<RefPtr<VTTRegion> > newRegions;
m_loader->getNewRegions(newRegions);
for (size_t i = 0; i < newRegions.size(); ++i) {
newRegions[i]->setTrack(this);
regions()->add(newRegions[i]);
}
}
size_t LoadableTextTrack::trackElementIndex()
{
ASSERT(m_trackElement);
ASSERT(m_trackElement->parentNode());
size_t index = 0;
for (Node* node = m_trackElement->parentNode()->firstChild(); node; node = node->nextSibling()) {
if (!node->hasTagName(trackTag) || !node->parentNode())
continue;
if (node == m_trackElement)
return index;
++index;
}
ASSERT_NOT_REACHED();
return 0;
}
} // namespace WebCore
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