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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.
80 lines
2 KiB
C++
80 lines
2 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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#pragma once
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#include <AK/String.h>
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#include <LibGC/Ptr.h>
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#include <LibJS/Forward.h>
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#include <LibWeb/Bindings/TextTrackPrototype.h>
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#include <LibWeb/DOM/EventTarget.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::HTML {
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class TextTrack final : public DOM::EventTarget {
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WEB_PLATFORM_OBJECT(TextTrack, DOM::EventTarget);
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GC_DECLARE_ALLOCATOR(TextTrack);
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public:
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// https://html.spec.whatwg.org/multipage/media.html#text-track-readiness-state
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enum class ReadinessState {
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NotLoaded,
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Loading,
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Loaded,
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FailedToLoad,
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};
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static GC::Ref<TextTrack> create(JS::Realm&);
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virtual ~TextTrack() override;
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Bindings::TextTrackKind kind();
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void set_kind(Bindings::TextTrackKind);
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String label();
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void set_label(String);
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String language();
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void set_language(String);
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String id();
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void set_id(String);
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Bindings::TextTrackMode mode();
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void set_mode(Bindings::TextTrackMode);
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void set_oncuechange(WebIDL::CallbackType*);
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WebIDL::CallbackType* oncuechange();
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ReadinessState readiness_state() { return m_readiness_state; }
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void set_readiness_state(ReadinessState readiness_state);
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void register_observer(Badge<TextTrackObserver>, TextTrackObserver&);
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void unregister_observer(Badge<TextTrackObserver>, TextTrackObserver&);
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private:
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TextTrack(JS::Realm&);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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Bindings::TextTrackKind m_kind { Bindings::TextTrackKind::Subtitles };
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String m_label {};
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String m_language {};
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String m_id {};
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Bindings::TextTrackMode m_mode { Bindings::TextTrackMode::Disabled };
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ReadinessState m_readiness_state { ReadinessState::NotLoaded };
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HashTable<GC::Ref<TextTrackObserver>> m_observers;
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};
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Bindings::TextTrackKind text_track_kind_from_string(String);
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}
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