PassRefPtr<PlatformTextTrack> TextTrack::platformTextTrack()
{
if (m_platformTextTrack)
return m_platformTextTrack;
PlatformTextTrack::TrackKind kind = PlatformTextTrack::Caption;
if (m_kind == subtitlesKeyword())
kind = PlatformTextTrack::Subtitle;
else if (m_kind == captionsKeyword())
kind = PlatformTextTrack::Caption;
else if (m_kind == descriptionsKeyword())
kind = PlatformTextTrack::Description;
else if (m_kind == chaptersKeyword())
kind = PlatformTextTrack::Chapter;
else if (m_kind == metadataKeyword())
kind = PlatformTextTrack::MetaData;
PlatformTextTrack::TrackType type = PlatformTextTrack::OutOfBand;
if (m_trackType == TrackElement)
type = PlatformTextTrack::OutOfBand;
else if (m_trackType == AddTrack)
type = PlatformTextTrack::Script;
else if (m_trackType == InBand)
type = PlatformTextTrack::InBand;
m_platformTextTrack = PlatformTextTrack::create(this, m_label, m_language, kind, type);
return m_platformTextTrack;
}
PassRefPtr<PlatformTextTrack> TextTrack::platformTextTrack()
{
if (m_platformTextTrack)
return m_platformTextTrack;
PlatformTextTrack::TrackKind platformKind = PlatformTextTrack::Caption;
if (kind() == subtitlesKeyword())
platformKind = PlatformTextTrack::Subtitle;
else if (kind() == captionsKeyword())
platformKind = PlatformTextTrack::Caption;
else if (kind() == descriptionsKeyword())
platformKind = PlatformTextTrack::Description;
else if (kind() == chaptersKeyword())
platformKind = PlatformTextTrack::Chapter;
else if (kind() == metadataKeyword())
platformKind = PlatformTextTrack::MetaData;
else if (kind() == forcedKeyword())
platformKind = PlatformTextTrack::Forced;
PlatformTextTrack::TrackType type = PlatformTextTrack::OutOfBand;
if (m_trackType == TrackElement)
type = PlatformTextTrack::OutOfBand;
else if (m_trackType == AddTrack)
type = PlatformTextTrack::Script;
else if (m_trackType == InBand)
type = PlatformTextTrack::InBand;
m_platformTextTrack = PlatformTextTrack::create(this, label(), language(), platformKind, type, uniqueId());
return m_platformTextTrack;
}
bool TextTrack::isValidKindKeyword(const AtomicString& value)
{
if (equalIgnoringCase(value, subtitlesKeyword()))
return true;
if (equalIgnoringCase(value, captionsKeyword()))
return true;
if (equalIgnoringCase(value, descriptionsKeyword()))
return true;
if (equalIgnoringCase(value, chaptersKeyword()))
return true;
if (equalIgnoringCase(value, metadataKeyword()))
return true;
return false;
}
bool TextTrack::isValidKindKeyword(const AtomicString& value)
{
if (value == subtitlesKeyword())
return true;
if (value == captionsKeyword())
return true;
if (value == descriptionsKeyword())
return true;
if (value == chaptersKeyword())
return true;
if (value == metadataKeyword())
return true;
return false;
}
TextTrack::TextTrack(ScriptExecutionContext* context, TextTrackClient* client, const AtomicString& kind, const AtomicString& id, const AtomicString& label, const AtomicString& language, TextTrackType type)
: TrackBase(TrackBase::TextTrack, id, label, language)
, m_scriptExecutionContext(context)
, m_client(client)
, m_trackType(type)
, m_trackIndex(invalidTrackIndex)
, m_renderedTrackIndex(invalidTrackIndex)
{
if (kind == captionsKeyword())
m_kind = Kind::Captions;
else if (kind == chaptersKeyword())
m_kind = Kind::Chapters;
else if (kind == descriptionsKeyword())
m_kind = Kind::Descriptions;
else if (kind == forcedKeyword())
m_kind = Kind::Forced;
else if (kind == metadataKeyword())
m_kind = Kind::Metadata;
}
const AtomicString& TextTrack::kindKeyword() const
{
switch (m_kind) {
case Kind::Captions:
return captionsKeyword();
case Kind::Chapters:
return chaptersKeyword();
case Kind::Descriptions:
return descriptionsKeyword();
case Kind::Forced:
return forcedKeyword();
case Kind::Metadata:
return metadataKeyword();
case Kind::Subtitles:
return subtitlesKeyword();
}
ASSERT_NOT_REACHED();
return subtitlesKeyword();
}
void TextTrack::addCue(PassRefPtr<TextTrackCue> prpCue, ExceptionCode& ec)
{
if (!prpCue)
return;
RefPtr<TextTrackCue> cue = prpCue;
// 4.7.10.12.6 Text tracks exposing in-band metadata
// The UA will use DataCue to expose only text track cue objects that belong to a text track that has a text
// track kind of metadata.
// If a DataCue is added to a TextTrack via the addCue() method but the text track does not have its text
// track kind set to metadata, throw a InvalidNodeTypeError exception and don't add the cue to the TextTrackList
// of the TextTrack.
if (cue->cueType() == TextTrackCue::Data && kind() != metadataKeyword()) {
ec = INVALID_NODE_TYPE_ERR;
return;
}
// TODO(93143): Add spec-compliant behavior for negative time values.
if (!cue->startMediaTime().isValid() || !cue->endMediaTime().isValid() || cue->startMediaTime() < MediaTime::zeroTime() || cue->endMediaTime() < MediaTime::zeroTime())
return;
// 4.8.10.12.5 Text track API
// The addCue(cue) method of TextTrack objects, when invoked, must run the following steps:
// 1. If the given cue is in a text track list of cues, then remove cue from that text track
// list of cues.
TextTrack* cueTrack = cue->track();
if (cueTrack && cueTrack != this)
cueTrack->removeCue(cue.get(), ASSERT_NO_EXCEPTION);
// 2. Add cue to the method's TextTrack object's text track's text track list of cues.
cue->setTrack(this);
ensureTextTrackCueList()->add(cue);
if (m_client)
m_client->textTrackAddCue(this, cue.get());
}