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/*
* Copyright (C) 2011, 2013 Google Inc. All rights reserved.
* Copyright (C) 2011-2020 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"
#include "LoadableTextTrack.h"
#if ENABLE(VIDEO)
#include "ElementInlines.h"
#include "ScriptExecutionContext.h"
#include "TextTrackCueList.h"
#include "VTTCue.h"
#include "VTTRegionList.h"
#include <wtf/SetForScope.h>
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(LoadableTextTrack);
LoadableTextTrack::LoadableTextTrack(HTMLTrackElement& track, const AtomString& kind, const AtomString& label, const AtomString& language)
: TextTrack(track.scriptExecutionContext(), kind, emptyAtom(), label, language, TrackElement)
, m_trackElement(track)
{
}
Ref<LoadableTextTrack> LoadableTextTrack::create(HTMLTrackElement& track, const AtomString& kind, const AtomString& label, const AtomString& language)
{
auto textTrack = adoptRef(*new LoadableTextTrack(track, kind, label, language));
textTrack->suspendIfNeeded();
return textTrack;
}
void LoadableTextTrack::scheduleLoad(const URL& url)
{
ASSERT(!url.isEmpty());
if (url == m_url)
return;
// When src attribute is changed we need to flush all collected track data
removeAllCues();
RefPtr trackElement = m_trackElement.get();
if (!trackElement)
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;
if (m_loadPending)
return;
// 3. Asynchronously run the remaining steps, while continuing with whatever task
// was responsible for creating the text track or changing the text track mode.
trackElement->scheduleTask([this, protectedThis = Ref { *this }](auto&) mutable {
SetForScope loadPending { m_loadPending, true, false };
RefPtr loader = m_loader;
if (loader)
loader->cancelLoad();
RefPtr trackElement = m_trackElement.get();
if (!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.
loader = TextTrackLoader::create(static_cast<TextTrackLoaderClient&>(*this), trackElement->protectedDocument().get());
m_loader = loader.copyRef();
if (!loader->load(m_url, *trackElement))
trackElement->didCompleteLoad(HTMLTrackElement::Failure);
});
}
void LoadableTextTrack::newCuesAvailable(TextTrackLoader& loader)
{
ASSERT(m_loader.get() == &loader);
if (!m_cues)
lazyInitialize(m_cues, TextTrackCueList::create());
for (auto& newCue : loader.getNewCues()) {
newCue->setTrack(this);
INFO_LOG(LOGIDENTIFIER, newCue.get());
m_cues->add(WTF::move(newCue));
}
TextTrack::newCuesAvailable(*m_cues);
}
void LoadableTextTrack::cueLoadingCompleted(TextTrackLoader& loader, bool loadingFailed)
{
ASSERT_UNUSED(loader, m_loader.get() == &loader);
RefPtr trackElement = m_trackElement.get();
if (!trackElement)
return;
INFO_LOG(LOGIDENTIFIER);
trackElement->didCompleteLoad(loadingFailed ? HTMLTrackElement::Failure : HTMLTrackElement::Success);
}
void LoadableTextTrack::newRegionsAvailable(TextTrackLoader& loader)
{
ASSERT(m_loader.get() == &loader);
RefPtr regions = this->regions();
for (auto& newRegion : loader.getNewRegions())
regions->add(WTF::move(newRegion));
}
void LoadableTextTrack::newStyleSheetsAvailable(TextTrackLoader& loader)
{
ASSERT(m_loader.get() == &loader);
m_styleSheets = loader.getNewStyleSheets();
}
AtomString LoadableTextTrack::id() const
{
RefPtr trackElement = m_trackElement.get();
if (!trackElement)
return emptyAtom();
return trackElement->attributeWithoutSynchronization(idAttr);
}
size_t LoadableTextTrack::trackElementIndex()
{
ASSERT(m_trackElement);
ASSERT(m_trackElement->parentNode());
size_t index = 0;
for (RefPtr<Node> node = m_trackElement->parentNode()->firstChild(); node; node = node->nextSibling()) {
if (!node->hasTagName(trackTag) || !node->parentNode())
continue;
if (node.get() == m_trackElement.get())
return index;
++index;
}
ASSERT_NOT_REACHED();
return 0;
}
bool LoadableTextTrack::isDefault() const
{
RefPtr trackElement = m_trackElement.get();
return trackElement && trackElement->hasAttributeWithoutSynchronization(defaultAttr);
}
} // namespace WebCore
#endif
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