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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_OBSERVER_H_
#define COMPONENTS_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_OBSERVER_H_
#include "base/component_export.h"
#include "base/observer_list_types.h"
namespace base {
class TimeDelta;
}
namespace system_media_controls {
class SystemMediaControls;
// Interface to observe events on the SystemMediaControls.
class COMPONENT_EXPORT(SYSTEM_MEDIA_CONTROLS) SystemMediaControlsObserver
: public base::CheckedObserver {
public:
// Called when the service has completed setup. Also called when an observer
// is added if the service is already set up.
virtual void OnServiceReady() {}
// Called when the observer should handle the given control.
virtual void OnNext(SystemMediaControls* sender) {}
virtual void OnPrevious(SystemMediaControls* sender) {}
virtual void OnPlay(SystemMediaControls* sender) {}
virtual void OnPause(SystemMediaControls* sender) {}
virtual void OnPlayPause(SystemMediaControls* sender) {}
virtual void OnStop(SystemMediaControls* sender) {}
virtual void OnSeek(SystemMediaControls* sender,
const base::TimeDelta& time) {}
virtual void OnSeekTo(SystemMediaControls* sender,
const base::TimeDelta& time) {}
protected:
~SystemMediaControlsObserver() override = default;
};
} // namespace system_media_controls
#endif // COMPONENTS_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_OBSERVER_H_
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