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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef DeviceOrientationDispatcher_h 32 #define DeviceOrientationDispatcher_h 33 34 #include "modules/device_orientation/DeviceSensorEventDispatcher.h" 35 #include "public/platform/WebDeviceOrientationListener.h" 36 #include "wtf/RefPtr.h" 37 38 namespace WebKit { 39 class WebDeviceOrientationData; 40 } 41 42 namespace WebCore { 43 44 class NewDeviceOrientationController; 45 class DeviceOrientationData; 46 47 // This class listens to device motion data and dispatches it to all 48 // listening controllers. 49 class DeviceOrientationDispatcher : public DeviceSensorEventDispatcher, public WebKit::WebDeviceOrientationListener { 50 public: 51 static DeviceOrientationDispatcher& instance(); 52 53 // Note that the returned object is owned by this class. 54 // FIXME: make the return value const, see crbug.com/233174. 55 DeviceOrientationData* latestDeviceOrientationData(); 56 57 // This method is called every time new device motion data is available. 58 virtual void didChangeDeviceOrientation(const WebKit::WebDeviceOrientationData&) OVERRIDE; 59 void addDeviceOrientationController(NewDeviceOrientationController*); 60 void removeDeviceOrientationController(NewDeviceOrientationController*); 61 62 private: 63 DeviceOrientationDispatcher(); 64 ~DeviceOrientationDispatcher(); 65 66 virtual void startListening() OVERRIDE; 67 virtual void stopListening() OVERRIDE; 68 69 RefPtr<DeviceOrientationData> m_lastDeviceOrientationData; 70 }; 71 72 } // namespace WebCore 73 74 #endif // DeviceOrientationDispatcher_h 75