third_party/WebKit/Source/modules/device_orientation/DeviceMotionEvent.cpp

/*
 * Copyright (C) 2010 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "modules/device_orientation/DeviceMotionEvent.h"

#include "modules/device_orientation/DeviceAcceleration.h"
#include "modules/device_orientation/DeviceMotionData.h"
#include "modules/device_orientation/DeviceMotionEventInit.h"
#include "modules/device_orientation/DeviceRotationRate.h"

namespace blink {

DeviceMotionEvent::~DeviceMotionEvent() {}

DeviceMotionEvent::DeviceMotionEvent()
    : m_deviceMotionData(DeviceMotionData::create()) {}

DeviceMotionEvent::DeviceMotionEvent(const AtomicString& eventType,
                                     const DeviceMotionEventInit& initializer)
    : Event(eventType, initializer),
      m_deviceMotionData(DeviceMotionData::create(initializer)) {}

DeviceMotionEvent::DeviceMotionEvent(const AtomicString& eventType,
                                     DeviceMotionData* deviceMotionData)
    : Event(eventType, false, false),  // Can't bubble, not cancelable
      m_deviceMotionData(deviceMotionData) {}

void DeviceMotionEvent::initDeviceMotionEvent(
    const AtomicString& type,
    bool bubbles,
    bool cancelable,
    DeviceMotionData* deviceMotionData) {
  if (isBeingDispatched())
    return;

  initEvent(type, bubbles, cancelable);
  m_deviceMotionData = deviceMotionData;

  m_acceleration.clear();
  m_accelerationIncludingGravity.clear();
  m_rotationRate.clear();
}

DeviceAcceleration* DeviceMotionEvent::acceleration() {
  if (!m_deviceMotionData->getAcceleration())
    return nullptr;

  if (!m_acceleration)
    m_acceleration =
        DeviceAcceleration::create(m_deviceMotionData->getAcceleration());

  return m_acceleration.get();
}

DeviceAcceleration* DeviceMotionEvent::accelerationIncludingGravity() {
  if (!m_deviceMotionData->getAccelerationIncludingGravity())
    return nullptr;

  if (!m_accelerationIncludingGravity)
    m_accelerationIncludingGravity = DeviceAcceleration::create(
        m_deviceMotionData->getAccelerationIncludingGravity());

  return m_accelerationIncludingGravity.get();
}

DeviceRotationRate* DeviceMotionEvent::rotationRate() {
  if (!m_deviceMotionData->getRotationRate())
    return nullptr;

  if (!m_rotationRate)
    m_rotationRate =
        DeviceRotationRate::create(m_deviceMotionData->getRotationRate());

  return m_rotationRate.get();
}

double DeviceMotionEvent::interval(bool& isNull) const {
  if (m_deviceMotionData->canProvideInterval())
    return m_deviceMotionData->interval();

  isNull = true;
  return 0;
}

const AtomicString& DeviceMotionEvent::interfaceName() const {
  return EventNames::DeviceMotionEvent;
}

DEFINE_TRACE(DeviceMotionEvent) {
  visitor->trace(m_deviceMotionData);
  visitor->trace(m_acceleration);
  visitor->trace(m_accelerationIncludingGravity);
  visitor->trace(m_rotationRate);
  Event::trace(visitor);
}

}  // namespace blink