third_party/WebKit/Source/modules/sensor/SensorReadingUpdater.h

// Copyright 2016 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 SensorReadingUpdater_h
#define SensorReadingUpdater_h

#include "device/generic_sensor/public/interfaces/sensor_provider.mojom-blink.h"
#include "platform/heap/Handle.h"

namespace blink {

class Document;
class SensorProxy;

// This class encapsulates sensor reading update notification logic.
class SensorReadingUpdater : public GarbageCollected<SensorReadingUpdater> {
 public:
  static SensorReadingUpdater* Create(SensorProxy*,
                                      device::mojom::blink::ReportingMode);

  virtual void Start();

  DECLARE_VIRTUAL_TRACE();

 protected:
  explicit SensorReadingUpdater(SensorProxy*);
  void EnqueueAnimationFrameTask();
  virtual void OnAnimationFrameInternal() = 0;

  Member<SensorProxy> sensor_proxy_;
  WeakMember<Document> document_;
  bool has_pending_animation_frame_task_;

 private:
  void OnAnimationFrame();
};

}  // namespace blink

#endif  // SensorReadingUpdater_h