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 #include "config.h" 32 #include "modules/device_orientation/DeviceMotionDispatcher.h" 33 34 #include "modules/device_orientation/DeviceMotionController.h" 35 #include "modules/device_orientation/DeviceMotionData.h" 36 #include "public/platform/Platform.h" 37 #include "wtf/TemporaryChange.h" 38 39 namespace WebCore { 40 41 DeviceMotionDispatcher& DeviceMotionDispatcher::instance() 42 { 43 DEFINE_STATIC_LOCAL(DeviceMotionDispatcher, deviceMotionDispatcher, ()); 44 return deviceMotionDispatcher; 45 } 46 47 DeviceMotionDispatcher::DeviceMotionDispatcher() 48 { 49 } 50 51 DeviceMotionDispatcher::~DeviceMotionDispatcher() 52 { 53 } 54 55 void DeviceMotionDispatcher::addDeviceMotionController(DeviceMotionController* controller) 56 { 57 addController(controller); 58 } 59 60 void DeviceMotionDispatcher::removeDeviceMotionController(DeviceMotionController* controller) 61 { 62 removeController(controller); 63 } 64 65 void DeviceMotionDispatcher::startListening() 66 { 67 WebKit::Platform::current()->setDeviceMotionListener(this); 68 } 69 70 void DeviceMotionDispatcher::stopListening() 71 { 72 WebKit::Platform::current()->setDeviceMotionListener(0); 73 m_lastDeviceMotionData.clear(); 74 } 75 76 void DeviceMotionDispatcher::didChangeDeviceMotion(const WebKit::WebDeviceMotionData& motion) 77 { 78 m_lastDeviceMotionData = DeviceMotionData::create(motion); 79 80 { 81 TemporaryChange<bool> changeIsDispatching(m_isDispatching, true); 82 // Don't fire controllers removed or added during event dispatch. 83 size_t size = m_controllers.size(); 84 for (size_t i = 0; i < size; ++i) { 85 if (m_controllers[i]) 86 static_cast<DeviceMotionController*>(m_controllers[i])->didChangeDeviceMotion(m_lastDeviceMotionData.get()); 87 } 88 } 89 90 if (m_needsPurge) 91 purgeControllers(); 92 } 93 94 DeviceMotionData* DeviceMotionDispatcher::latestDeviceMotionData() 95 { 96 return m_lastDeviceMotionData.get(); 97 } 98 99 } // namespace WebCore 100