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::isMainProgramContent() const
{
// "Main program" content is intrinsic to the presentation of the media file, regardless of locale. Content such as
// directors commentary is not "main program" because it is not essential for the presentation. HTML5 doesn't have
// a way to express this in a machine-reable form, it is typically done with the track label, so we assume that caption
// tracks are main content and all other track types are not.
return kind() == captionsKeyword();
}
bool VideoTrack::isValidKind(const AtomicString& kind) const
{
return (kind == alternativeKeyword())
|| (kind == captionsKeyword())
|| (kind == mainKeyword())
|| (kind == signKeyword())
|| (kind == subtitlesKeyword())
|| (kind == commentaryKeyword());
}
bool TextTrack::isRendered()
{
if (kind() != captionsKeyword() && kind() != subtitlesKeyword() && kind() != forcedKeyword())
return false;
if (m_mode != showingKeyword())
return false;
return true;
}
bool TextTrack::isRendered()
{
if (m_kind != captionsKeyword() && m_kind != subtitlesKeyword())
return false;
if (m_mode != showingKeyword() && !m_showingByDefault)
return false;
return true;
}
void TextTrack::setKind(const AtomicString& newKind)
{
AtomicString oldKind = kind();
TrackBase::setKind(newKind);
// If kind changes from visual to non-visual and mode is 'showing', then force mode to 'hidden'.
// FIXME: This is not per spec. crbug.com/460923
if (oldKind != kind() && mode() == showingKeyword()) {
if (kind() != captionsKeyword() && kind() != subtitlesKeyword())
setMode(hiddenKeyword());
}
}
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;
}
bool VideoTrack::isValidKind(const AtomicString& value) const
{
if (value == alternativeKeyword())
return true;
if (value == captionsKeyword())
return true;
if (value == mainKeyword())
return true;
if (value == signKeyword())
return true;
if (value == subtitlesKeyword())
return true;
if (value == commentaryKeyword())
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();
}