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// 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 CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_ORIENTATION_EVENT_PUMP_H_
#define CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_ORIENTATION_EVENT_PUMP_H_
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "content/renderer/device_sensors/device_sensor_event_pump.h"
#include "content/renderer/shared_memory_seqlock_reader.h"
#include "third_party/WebKit/public/platform/modules/device_orientation/WebDeviceOrientationData.h"
namespace blink {
class WebDeviceOrientationListener;
}
namespace content {
typedef SharedMemorySeqLockReader<blink::WebDeviceOrientationData>
DeviceOrientationSharedMemoryReader;
class CONTENT_EXPORT DeviceOrientationEventPump
: public DeviceSensorEventPump<blink::WebDeviceOrientationListener> {
public:
// Angle threshold beyond which two orientation events are considered
// sufficiently different.
static const double kOrientationThreshold;
explicit DeviceOrientationEventPump(RenderThread* thread);
~DeviceOrientationEventPump() override;
// PlatformEventObserver.
bool OnControlMessageReceived(const IPC::Message& message) override;
void SendFakeDataForTesting(void* data) override;
protected:
void FireEvent() override;
bool InitializeReader(base::SharedMemoryHandle handle) override;
// PlatformEventObserver.
void SendStartMessage() override;
void SendStopMessage() override;
bool ShouldFireEvent(const blink::WebDeviceOrientationData& data) const;
blink::WebDeviceOrientationData data_;
scoped_ptr<DeviceOrientationSharedMemoryReader> reader_;
DISALLOW_COPY_AND_ASSIGN(DeviceOrientationEventPump);
};
} // namespace content
#endif // CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_ORIENTATION_EVENT_PUMP_H_
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