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 #include "config.h" 27 #include "DeviceMotionController.h" 28 29 #include "DeviceMotionClient.h" 30 #include "DeviceMotionData.h" 31 #include "DeviceMotionEvent.h" 32 33 namespace WebCore { 34 35 DeviceMotionController::DeviceMotionController(DeviceMotionClient* client) 36 : m_client(client) 37 , m_timer(this, &DeviceMotionController::timerFired) 38 { 39 ASSERT(m_client); 40 m_client->setController(this); 41 } 42 43 DeviceMotionController::~DeviceMotionController() 44 { 45 m_client->deviceMotionControllerDestroyed(); 46 } 47 48 void DeviceMotionController::timerFired(Timer<DeviceMotionController>* timer) 49 { 50 ASSERT_UNUSED(timer, timer == &m_timer); 51 ASSERT(!m_client || m_client->currentDeviceMotion()); 52 m_timer.stop(); 53 54 RefPtr<DeviceMotionData> deviceMotionData = m_client ? m_client->currentDeviceMotion() : DeviceMotionData::create(); 55 RefPtr<DeviceMotionEvent> event = DeviceMotionEvent::create(eventNames().devicemotionEvent, deviceMotionData.get()); 56 57 Vector<RefPtr<DOMWindow> > listenersVector; 58 copyToVector(m_newListeners, listenersVector); 59 m_newListeners.clear(); 60 for (size_t i = 0; i < listenersVector.size(); ++i) 61 listenersVector[i]->dispatchEvent(event); 62 } 63 64 void DeviceMotionController::addListener(DOMWindow* window) 65 { 66 // If no client is present or the client already has motion data, 67 // immediately trigger an asynchronous response. 68 if (!m_client || m_client->currentDeviceMotion()) { 69 m_newListeners.add(window); 70 if (!m_timer.isActive()) 71 m_timer.startOneShot(0); 72 } 73 74 bool wasEmpty = m_listeners.isEmpty(); 75 m_listeners.add(window); 76 if (wasEmpty && m_client) 77 m_client->startUpdating(); 78 } 79 80 void DeviceMotionController::removeListener(DOMWindow* window) 81 { 82 m_listeners.remove(window); 83 m_newListeners.remove(window); 84 if (m_listeners.isEmpty() && m_client) 85 m_client->stopUpdating(); 86 } 87 88 void DeviceMotionController::removeAllListeners(DOMWindow* window) 89 { 90 // May be called with a DOMWindow that's not a listener. 91 if (!m_listeners.contains(window)) 92 return; 93 94 m_listeners.removeAll(window); 95 m_newListeners.remove(window); 96 if (m_listeners.isEmpty() && m_client) 97 m_client->stopUpdating(); 98 } 99 100 void DeviceMotionController::didChangeDeviceMotion(DeviceMotionData* deviceMotionData) 101 { 102 RefPtr<DeviceMotionEvent> event = DeviceMotionEvent::create(eventNames().devicemotionEvent, deviceMotionData); 103 Vector<RefPtr<DOMWindow> > listenersVector; 104 copyToVector(m_listeners, listenersVector); 105 for (size_t i = 0; i < listenersVector.size(); ++i) 106 listenersVector[i]->dispatchEvent(event); 107 } 108 109 } // namespace WebCore 110