1 /* 2 * Copyright (C) 2013 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef DeviceSensorEventController_h 27 #define DeviceSensorEventController_h 28 29 #include "core/dom/Event.h" 30 #include "core/platform/Timer.h" 31 32 namespace WebCore { 33 34 class Document; 35 36 class DeviceSensorEventController { 37 38 public: 39 void startUpdating(); 40 void stopUpdating(); 41 42 protected: 43 explicit DeviceSensorEventController(Document*); 44 virtual ~DeviceSensorEventController(); 45 46 void dispatchDeviceEvent(const PassRefPtr<Event>); 47 48 virtual bool hasLastData() = 0; 49 virtual PassRefPtr<Event> getLastEvent() = 0; 50 virtual void registerWithDispatcher() = 0; 51 virtual void unregisterWithDispatcher() = 0; 52 virtual bool isNullEvent(Event*) = 0; 53 54 private: 55 void fireDeviceEvent(Timer<DeviceSensorEventController>*); 56 57 Document* m_document; 58 bool m_isActive; 59 bool m_needsCheckingNullEvents; 60 Timer<DeviceSensorEventController> m_timer; 61 }; 62 63 } // namespace WebCore 64 65 #endif // DeviceSensorEventController_h 66
