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de34143a4e
The text track processing model would previously spin forever waiting for the track URL to change. It would then recursively invoke itself to handle the new URL, again entering the spin loop. This meant that tracks could easily cause event loop hangs. We now have an observer system to be notified when the track state changes instead. This lets us exit the processing model and move on.
153 lines
3.6 KiB
C++
153 lines
3.6 KiB
C++
/*
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* Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/Realm.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/HTML/EventNames.h>
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#include <LibWeb/HTML/TextTrack.h>
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#include <LibWeb/HTML/TextTrackObserver.h>
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namespace Web::HTML {
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GC_DEFINE_ALLOCATOR(TextTrack);
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GC::Ref<TextTrack> TextTrack::create(JS::Realm& realm)
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{
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return realm.create<TextTrack>(realm);
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}
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TextTrack::TextTrack(JS::Realm& realm)
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: DOM::EventTarget(realm)
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{
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}
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TextTrack::~TextTrack() = default;
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void TextTrack::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(TextTrack);
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Base::initialize(realm);
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}
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void TextTrack::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_observers);
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}
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// https://html.spec.whatwg.org/multipage/media.html#dom-texttrack-kind
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Bindings::TextTrackKind TextTrack::kind()
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{
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return m_kind;
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}
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void TextTrack::set_kind(Bindings::TextTrackKind kind)
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{
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m_kind = kind;
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}
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// https://html.spec.whatwg.org/multipage/media.html#dom-texttrack-label
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String TextTrack::label()
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{
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return m_label;
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}
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void TextTrack::set_label(String label)
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{
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m_label = label;
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}
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// https://html.spec.whatwg.org/multipage/media.html#dom-texttrack-language
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String TextTrack::language()
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{
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return m_language;
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}
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void TextTrack::set_language(String language)
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{
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m_language = language;
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}
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// https://html.spec.whatwg.org/multipage/media.html#dom-texttrack-id
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String TextTrack::id()
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{
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return m_id;
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}
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void TextTrack::set_id(String id)
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{
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m_id = id;
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}
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// https://html.spec.whatwg.org/multipage/media.html#dom-texttrack-mode
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Bindings::TextTrackMode TextTrack::mode()
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{
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return m_mode;
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}
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void TextTrack::set_mode(Bindings::TextTrackMode mode)
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{
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m_mode = mode;
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}
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// https://html.spec.whatwg.org/multipage/media.html#handler-texttrack-oncuechange
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void TextTrack::set_oncuechange(WebIDL::CallbackType* event_handler)
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{
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set_event_handler_attribute(HTML::EventNames::cuechange, event_handler);
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}
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// https://html.spec.whatwg.org/multipage/media.html#handler-texttrack-oncuechange
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WebIDL::CallbackType* TextTrack::oncuechange()
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{
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return event_handler_attribute(HTML::EventNames::cuechange);
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}
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void TextTrack::set_readiness_state(ReadinessState readiness_state)
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{
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m_readiness_state = readiness_state;
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for (auto observer : m_observers) {
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if (auto callback = observer->track_readiness_observer())
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callback->function()(m_readiness_state);
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}
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}
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void TextTrack::register_observer(Badge<TextTrackObserver>, TextTrackObserver& observer)
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{
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auto result = m_observers.set(observer);
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VERIFY(result == AK::HashSetResult::InsertedNewEntry);
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}
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void TextTrack::unregister_observer(Badge<TextTrackObserver>, TextTrackObserver& observer)
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{
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bool was_removed = m_observers.remove(observer);
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VERIFY(was_removed);
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}
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Bindings::TextTrackKind text_track_kind_from_string(String value)
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{
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// https://html.spec.whatwg.org/multipage/media.html#attr-track-kind
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if (value.is_empty() || value.equals_ignoring_ascii_case("subtitles"sv)) {
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return Bindings::TextTrackKind::Subtitles;
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}
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if (value.equals_ignoring_ascii_case("captions"sv)) {
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return Bindings::TextTrackKind::Captions;
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}
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if (value.equals_ignoring_ascii_case("descriptions"sv)) {
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return Bindings::TextTrackKind::Descriptions;
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}
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if (value.equals_ignoring_ascii_case("chapters"sv)) {
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return Bindings::TextTrackKind::Chapters;
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}
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if (value.equals_ignoring_ascii_case("metadata"sv)) {
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return Bindings::TextTrackKind::Metadata;
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}
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return Bindings::TextTrackKind::Metadata;
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}
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}
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