#pragma once
#if ENABLE(MEDIA_SESSION)
#include "MediaRemoteControls.h"
#include "MediaSessionMetadata.h"
namespace WebCore {
class Dictionary;
class Document;
class HTMLMediaElement;
class MediaSession final : public RefCounted<MediaSession> {
public:
enum class Kind { Content, Transient, TransientSolo, Ambient };
enum class State { Idle, Active, Interrupted };
static Ref<MediaSession> create(ScriptExecutionContext& context, Kind kind)
{
return adoptRef(*new MediaSession(context, kind));
}
~MediaSession();
Kind kind() const { return m_kind; }
MediaRemoteControls* controls();
WEBCORE_EXPORT State currentState() const { return m_currentState; }
bool hasActiveMediaElements() const;
void setMetadata(const Dictionary&);
void deactivate();
bool invoke();
void handleDuckInterruption();
void handleIndefinitePauseInterruption();
void handlePauseInterruption();
void handleUnduckInterruption();
void handleUnpauseInterruption();
void togglePlayback();
void skipToNextTrack();
void skipToPreviousTrack();
void controlIsEnabledDidChange();
private:
friend class HTMLMediaElement;
MediaSession(ScriptExecutionContext&, const String&);
void addMediaElement(HTMLMediaElement&);
void removeMediaElement(HTMLMediaElement&);
void safelyIterateActiveMediaElements(std::function<void(HTMLMediaElement*)>);
void changeActiveMediaElements(std::function<void(void)>);
void addActiveMediaElement(HTMLMediaElement&);
bool isMediaElementActive(HTMLMediaElement&);
void releaseInternal();
State m_currentState { State::Idle };
HashSet<HTMLMediaElement*> m_participatingElements;
HashSet<HTMLMediaElement*> m_activeParticipatingElements;
HashSet<HTMLMediaElement*>* m_iteratedActiveParticipatingElements { nullptr };
Document& m_document;
const Kind m_kind;
RefPtr<MediaRemoteControls> m_controls;
MediaSessionMetadata m_metadata;
};
}
#endif