#pragma once
#if ENABLE(MEDIA_SESSION)
#include "MediaRemoteControls.h"
#include "MediaSessionMetadata.h"
#include <wtf/Function.h>
#include <wtf/HashSet.h>
namespace WebCore {
class Document;
class HTMLMediaElement;
class MediaSession final : public RefCounted<MediaSession> {
public:
enum class Kind { Content, Transient, TransientSolo, Ambient };
enum class State { Idle, Active, Interrupted };
struct Metadata {
String title;
String artist;
String album;
String artwork;
};
static Ref<MediaSession> create(Document& document, Kind kind)
{
return adoptRef(*new MediaSession(document, kind));
}
~MediaSession();
Kind kind() const { return m_kind; }
MediaRemoteControls* controls();
WEBCORE_EXPORT State currentState() const { return m_currentState; }
bool hasActiveMediaElements() const;
void setMetadata(const std::optional<Metadata>&);
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(Document&, Kind);
void addMediaElement(HTMLMediaElement&);
void removeMediaElement(HTMLMediaElement&);
void safelyIterateActiveMediaElements(const WTF::Function<void(HTMLMediaElement*)>&);
void changeActiveMediaElements(const WTF::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