1 /* 2 * Copyright 2010 Apple 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 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef DeviceMotionController_h 27 #define DeviceMotionController_h 28 29 #include "DOMWindow.h" 30 #include "Timer.h" 31 #include <wtf/HashCountedSet.h> 32 33 namespace WebCore { 34 35 class DeviceMotionData; 36 class DeviceMotionClient; 37 38 class DeviceMotionController { 39 public: 40 DeviceMotionController(DeviceMotionClient*); 41 ~DeviceMotionController(); 42 43 void addListener(DOMWindow*); 44 void removeListener(DOMWindow*); 45 void removeAllListeners(DOMWindow*); 46 47 void didChangeDeviceMotion(DeviceMotionData*); 48 49 bool isActive() { return !m_listeners.isEmpty(); } 50 51 private: 52 void timerFired(Timer<DeviceMotionController>*); 53 54 DeviceMotionClient* m_client; 55 typedef HashCountedSet<RefPtr<DOMWindow> > ListenersCountedSet; 56 ListenersCountedSet m_listeners; 57 typedef HashSet<RefPtr<DOMWindow> > ListenersSet; 58 ListenersSet m_newListeners; 59 Timer<DeviceMotionController> m_timer; 60 }; 61 62 } // namespace WebCore 63 64 #endif // DeviceMotionController_h 65
