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da4e8b2b2b
Since the queued task callback is already capturing the media element weakly, we may as well directly use that in the steps that need to interact with the element, which is the majority of them. Also, root the element in the callback. This ensures that any queued tasks will fire events before the element gets collected.
74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/*
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* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
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* Copyright (c) 2025, Gregory Bertilson <gregory@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Time.h>
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#include <LibJS/Runtime/Realm.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Bindings/VideoTrack.h>
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#include <LibWeb/DOM/Event.h>
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#include <LibWeb/HTML/EventNames.h>
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#include <LibWeb/HTML/HTMLMediaElement.h>
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#include <LibWeb/HTML/VideoTrack.h>
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#include <LibWeb/HTML/VideoTrackList.h>
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namespace Web::HTML {
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GC_DEFINE_ALLOCATOR(VideoTrack);
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VideoTrack::VideoTrack(JS::Realm& realm, GC::Ref<HTMLMediaElement> media_element, Media::Track const& track)
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: MediaTrackBase(realm, media_element, track)
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{
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}
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VideoTrack::~VideoTrack() = default;
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void VideoTrack::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(VideoTrack);
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Base::initialize(realm);
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}
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void VideoTrack::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_video_track_list);
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}
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// https://html.spec.whatwg.org/multipage/media.html#dom-videotrack-selected
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void VideoTrack::set_selected(bool selected)
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{
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// On setting, it must select the track if the new value is true, and unselect it otherwise.
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if (m_selected == selected)
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return;
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m_selected = selected;
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if (!m_video_track_list)
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return;
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// If the track is in a VideoTrackList, then all the other VideoTrack objects in that list must be unselected. (If the track is
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// no longer in a VideoTrackList object, then the track being selected or unselected has no effect beyond changing the value of
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// the attribute on the VideoTrack object.)
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for (auto video_track : m_video_track_list->video_tracks()) {
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if (video_track.ptr() != this)
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video_track->m_selected = false;
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}
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// Whenever a track in a VideoTrackList that was previously not selected is selected, and whenever the selected track in a
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// VideoTrackList is unselected without a new track being selected in its stead, the user agent must queue a media element
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// task given the media element to fire an event named change at the VideoTrackList object. This task must be queued before
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// the task that fires the resize event, if any.
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media_element().queue_a_media_element_task([video_track_list = m_video_track_list](HTMLMediaElement&) {
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video_track_list->dispatch_event(DOM::Event::create(video_track_list->realm(), HTML::EventNames::change));
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});
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// AD-HOC: Inform the element node that we have (un)selected a video track for layout.
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media_element().set_selected_video_track({}, m_selected ? this : nullptr);
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}
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}
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