void MediaControls::showTextTrackAtIndex(unsigned indexToEnable) {
TextTrackList* trackList = mediaElement().textTracks();
if (indexToEnable >= trackList->length())
return;
TextTrack* track = trackList->anonymousIndexedGetter(indexToEnable);
if (track && track->canBeRendered())
track->setMode(TextTrack::showingKeyword());
}
void MediaControlTextTrackListElement::refreshTextTrackListMenu()
{
if (!mediaElement().hasClosedCaptions() || !mediaElement().textTracksAreReady())
return;
EventDispatchForbiddenScope::AllowUserAgentEvents allowEvents;
removeChildren(OmitSubtreeModifiedEvent);
// Construct a menu for subtitles and captions
// Pass in a nullptr to createTextTrackListItem to create the "Off" track item.
appendChild(createTextTrackListItem(nullptr));
TextTrackList* trackList = mediaElement().textTracks();
for (unsigned i = 0; i < trackList->length(); i++) {
TextTrack* track = trackList->anonymousIndexedGetter(i);
if (!track->canBeRendered())
continue;
appendChild(createTextTrackListItem(track));
}
}
