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 "core/frame/PlatformEventDispatcher.h" 35 #include "platform/heap/Handle.h" 36 #include "public/platform/WebDeviceOrientationListener.h" 37 #include "wtf/RefPtr.h" 38 39 namespace blink { 40 41 class DeviceOrientationController; 42 class DeviceOrientationData; 43 class WebDeviceOrientationData; 44 45 // This class listens to device orientation data and notifies all registered controllers. 46 class DeviceOrientationDispatcher : public PlatformEventDispatcher, public WebDeviceOrientationListener { 47 public: 48 static DeviceOrientationDispatcher& instance(); 49 50 // Note that the returned object is owned by this class. 51 // FIXME: make the return value const, see crbug.com/233174. 52 DeviceOrientationData* latestDeviceOrientationData(); 53 54 // Inherited from WebDeviceOrientationListener. 55 virtual void didChangeDeviceOrientation(const WebDeviceOrientationData&) OVERRIDE; 56 57 private: 58 DeviceOrientationDispatcher(); 59 ~DeviceOrientationDispatcher(); 60 61 // Inherited from PlatformEventDispatcher. 62 virtual void startListening() OVERRIDE; 63 virtual void stopListening() OVERRIDE; 64 65 Persistent<DeviceOrientationData> m_lastDeviceOrientationData; 66 }; 67 68 } // namespace blink 69 70 #endif // DeviceOrientationDispatcher_h 71