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| 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 DeviceMotionDispatcher_h |
| 32 #define DeviceMotionDispatcher_h |
| 33 |
| 34 #include "DeviceMotionData.h" |
| 35 #include "wtf/RefPtr.h" |
| 36 #include "wtf/Vector.h" |
| 37 #include <public/WebDeviceMotionListener.h> |
| 38 |
| 39 namespace WebKit { |
| 40 class WebDeviceMotionData; |
| 41 } |
| 42 |
| 43 namespace WebCore { |
| 44 |
| 45 class DeviceMotionController; |
| 46 class DeviceMotionData; |
| 47 |
| 48 // This class listens to device motion data and dispatches it to all |
| 49 // listening controllers. |
| 50 class DeviceMotionDispatcher : public WebKit::WebDeviceMotionListener { |
| 51 public: |
| 52 static DeviceMotionDispatcher& instance(); |
| 53 |
| 54 void addController(DeviceMotionController*); |
| 55 void removeController(DeviceMotionController*); |
| 56 |
| 57 // Note that the returned object is owned by this class. |
| 58 // FIXME: make the return value const, see crbug.com/233174. |
| 59 DeviceMotionData* latestDeviceMotionData(); |
| 60 |
| 61 // This method is called every time new device motion data is available. |
| 62 virtual void didChangeDeviceMotion(const WebKit::WebDeviceMotionData&) OVERR
IDE; |
| 63 |
| 64 private: |
| 65 DeviceMotionDispatcher(); |
| 66 ~DeviceMotionDispatcher(); |
| 67 |
| 68 void startListening(); |
| 69 void stopListening(); |
| 70 |
| 71 void purgeControllers(); |
| 72 |
| 73 RefPtr<DeviceMotionData> m_lastDeviceMotionData; |
| 74 Vector<DeviceMotionController*> m_controllers; |
| 75 }; |
| 76 |
| 77 } // namespace WebCore |
| 78 |
| 79 #endif // DeviceMotionDispatcher_h |
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