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      1 /*
      2  * Copyright (C) 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  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. 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 APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 "modules/device_orientation/DeviceMotionEvent.h"
     28 
     29 #include "modules/device_orientation/DeviceAcceleration.h"
     30 #include "modules/device_orientation/DeviceMotionData.h"
     31 #include "modules/device_orientation/DeviceRotationRate.h"
     32 
     33 namespace blink {
     34 
     35 DeviceMotionEvent::~DeviceMotionEvent()
     36 {
     37 }
     38 
     39 DeviceMotionEvent::DeviceMotionEvent()
     40     : m_deviceMotionData(DeviceMotionData::create())
     41 {
     42 }
     43 
     44 DeviceMotionEvent::DeviceMotionEvent(const AtomicString& eventType, DeviceMotionData* deviceMotionData)
     45     : Event(eventType, false, false) // Can't bubble, not cancelable
     46     , m_deviceMotionData(deviceMotionData)
     47 {
     48 }
     49 
     50 void DeviceMotionEvent::initDeviceMotionEvent(const AtomicString& type, bool bubbles, bool cancelable, DeviceMotionData* deviceMotionData)
     51 {
     52     if (dispatched())
     53         return;
     54 
     55     initEvent(type, bubbles, cancelable);
     56     m_deviceMotionData = deviceMotionData;
     57 
     58     m_acceleration.clear();
     59     m_accelerationIncludingGravity.clear();
     60     m_rotationRate.clear();
     61 }
     62 
     63 DeviceAcceleration* DeviceMotionEvent::acceleration()
     64 {
     65     if (!m_deviceMotionData->acceleration())
     66         return 0;
     67 
     68     if (!m_acceleration)
     69         m_acceleration = DeviceAcceleration::create(m_deviceMotionData->acceleration());
     70 
     71     return m_acceleration.get();
     72 }
     73 
     74 DeviceAcceleration* DeviceMotionEvent::accelerationIncludingGravity()
     75 {
     76     if (!m_deviceMotionData->accelerationIncludingGravity())
     77         return 0;
     78 
     79     if (!m_accelerationIncludingGravity)
     80         m_accelerationIncludingGravity = DeviceAcceleration::create(m_deviceMotionData->accelerationIncludingGravity());
     81 
     82     return m_accelerationIncludingGravity.get();
     83 }
     84 
     85 DeviceRotationRate* DeviceMotionEvent::rotationRate()
     86 {
     87     if (!m_deviceMotionData->rotationRate())
     88         return 0;
     89 
     90     if (!m_rotationRate)
     91         m_rotationRate = DeviceRotationRate::create(m_deviceMotionData->rotationRate());
     92 
     93     return m_rotationRate.get();
     94 }
     95 
     96 double DeviceMotionEvent::interval(bool& isNull) const
     97 {
     98     if (m_deviceMotionData->canProvideInterval())
     99         return m_deviceMotionData->interval();
    100 
    101     isNull = true;
    102     return 0;
    103 }
    104 
    105 const AtomicString& DeviceMotionEvent::interfaceName() const
    106 {
    107     return EventNames::DeviceMotionEvent;
    108 }
    109 
    110 void DeviceMotionEvent::trace(Visitor* visitor)
    111 {
    112     visitor->trace(m_deviceMotionData);
    113     visitor->trace(m_acceleration);
    114     visitor->trace(m_accelerationIncludingGravity);
    115     visitor->trace(m_rotationRate);
    116     Event::trace(visitor);
    117 }
    118 
    119 } // namespace blink
    120