Source code

Revision control

Other Tools

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at */
#include "MediaControlKeySource.h"
#include "MediaEventSource.h"
#include "nsIObserver.h"
namespace mozilla {
namespace dom {
* MediaControlKeyManager is a wrapper of MediaControlKeySource, which
* is used to manage creating and destroying a real media keys event source.
* It monitors the amount of the media controller in MediaService, and would
* create the event source when there is any existing controller and destroy it
* when there is no controller.
class MediaControlKeyManager final : public MediaControlKeySource,
public MediaControlKeyListener {
NS_INLINE_DECL_REFCOUNTING(MediaControlKeyManager, override)
// MediaControlKeySource methods
bool Open() override;
void Close() override;
bool IsOpened() const override;
void SetPlaybackState(MediaSessionPlaybackState aState) override;
MediaSessionPlaybackState GetPlaybackState() const override;
// MediaControlKeyListener methods
void OnActionPerformed(const MediaControlAction& aAction) override;
void SetMediaMetadata(const MediaMetadataBase& aMetadata) override;
void SetSupportedMediaKeys(const MediaKeysArray& aSupportedKeys) override;
void SetEnableFullScreen(bool aIsEnabled) override;
void SetEnablePictureInPictureMode(bool aIsEnabled) override;
void SetPositionState(const PositionState& aState) override;
void Shutdown();
class Observer final : public nsIObserver {
explicit Observer(MediaControlKeyManager* aManager);
virtual ~Observer() = default;
MediaControlKeyManager* MOZ_OWNING_REF mManager;
RefPtr<Observer> mObserver;
void OnPreferenceChange();
bool StartMonitoringControlKeys();
void StopMonitoringControlKeys();
RefPtr<MediaControlKeySource> mEventSource;
MediaMetadataBase mMetadata;
nsTArray<MediaControlKey> mSupportedKeys;
} // namespace dom
} // namespace mozilla