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LibWeb/HTML: Implement HTMLMediaElement.addTextTrack

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Removes some noise from the console when browsing bbc.co.uk :^)
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Jamie Mansfield 2024-07-25 20:23:15 +01:00 • committed by Andreas Kling
parent ff08c2f735
commit 793248aec9
Notes: github-actions[bot] 2024-07-26 07:31:07 +00:00
5 changed files with 61 additions and 1 deletions
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36
Userland/Libraries/LibWeb/HTML/HTMLMediaElement.cpp
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@ -465,6 +465,42 @@ double HTMLMediaElement::effective_media_volume() const
return volume;
}
// https://html.spec.whatwg.org/multipage/media.html#dom-media-addtexttrack
JS::NonnullGCPtr<TextTrack> HTMLMediaElement::add_text_track(Bindings::TextTrackKind kind, String const& label, String const& language)
{
// 1. Create a new TextTrack object.
auto text_track = TextTrack::create(this->realm());
// 2. Create a new text track corresponding to the new object, and set its text track kind to kind, its text track
// label to label, its text track language to language, its text track readiness state to the text track loaded
// state, its text track mode to the text track hidden mode, and its text track list of cues to an empty list.
text_track->set_kind(kind);
text_track->set_label(label);
text_track->set_language(language);
text_track->set_readiness_state(TextTrack::ReadinessState::Loaded);
text_track->set_mode(Bindings::TextTrackMode::Hidden);
// FIXME: set text track list of cues to an empty list
// FIXME: 3. Initially, the text track list of cues is not associated with any rules for updating the text track rendering.
// When a text track cue is added to it, the text track list of cues has its rules permanently set accordingly.
// FIXME: 4. Add the new text track to the media element's list of text tracks.
// 5. Queue a media element task given the media element to fire an event named addtrack at the media element's
// textTracks attribute's TextTrackList object, using TrackEvent, with the track attribute initialized to the new
// text track's TextTrack object.
queue_a_media_element_task([this, text_track] {
TrackEventInit event_init {};
event_init.track = JS::make_handle(text_track);
auto event = TrackEvent::create(this->realm(), HTML::EventNames::addtrack, move(event_init));
m_text_tracks->dispatch_event(event);
});
// 6. Return the new TextTrack object.
return text_track;
}
// https://html.spec.whatwg.org/multipage/media.html#media-element-load-algorithm
WebIDL::ExceptionOr<void> HTMLMediaElement::load_element()
{