third_party/WebKit/Source/modules/device_light/DeviceLightDispatcher.h

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef DeviceLightDispatcher_h
#define DeviceLightDispatcher_h

#include "core/frame/PlatformEventDispatcher.h"
#include "platform/heap/Handle.h"
#include "public/platform/WebDeviceLightListener.h"

namespace blink {

// This class listens to device light data and notifies all registered
// controllers.
class DeviceLightDispatcher final
    : public GarbageCollectedFinalized<DeviceLightDispatcher>,
      public PlatformEventDispatcher,
      public WebDeviceLightListener {
  USING_GARBAGE_COLLECTED_MIXIN(DeviceLightDispatcher);

 public:
  static DeviceLightDispatcher& instance();
  ~DeviceLightDispatcher() override;

  double latestDeviceLightData() const;

  // Inherited from WebDeviceLightListener.
  void didChangeDeviceLight(double) override;

  DECLARE_VIRTUAL_TRACE();

 private:
  DeviceLightDispatcher();

  // Inherited from PlatformEventDispatcher.
  void startListening() override;
  void stopListening() override;

  double m_lastDeviceLightData;
};

}  // namespace blink

#endif  // DeviceLightDispatcher_h