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

/*
 * Copyright 2010, The Android Open Source Project
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER 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.
 */

#include "modules/device_orientation/DeviceOrientationEvent.h"

#include "modules/device_orientation/DeviceOrientationData.h"
#include "modules/device_orientation/DeviceOrientationEventInit.h"

namespace blink {

DeviceOrientationEvent::~DeviceOrientationEvent() {}

DeviceOrientationEvent::DeviceOrientationEvent()
    : m_orientation(DeviceOrientationData::create()) {}

DeviceOrientationEvent::DeviceOrientationEvent(
    const AtomicString& eventType,
    const DeviceOrientationEventInit& initializer)
    : Event(eventType, initializer),
      m_orientation(DeviceOrientationData::create(initializer)) {}

DeviceOrientationEvent::DeviceOrientationEvent(
    const AtomicString& eventType,
    DeviceOrientationData* orientation)
    : Event(eventType, false, false),  // Can't bubble, not cancelable
      m_orientation(orientation) {}

void DeviceOrientationEvent::initDeviceOrientationEvent(
    const AtomicString& type,
    bool bubbles,
    bool cancelable,
    const Nullable<double>& alpha,
    const Nullable<double>& beta,
    const Nullable<double>& gamma,
    bool absolute) {
  if (isBeingDispatched())
    return;

  initEvent(type, bubbles, cancelable);
  m_orientation = DeviceOrientationData::create(alpha, beta, gamma, absolute);
}

double DeviceOrientationEvent::alpha(bool& isNull) const {
  if (m_orientation->canProvideAlpha())
    return m_orientation->alpha();

  isNull = true;
  return 0;
}

double DeviceOrientationEvent::beta(bool& isNull) const {
  if (m_orientation->canProvideBeta())
    return m_orientation->beta();

  isNull = true;
  return 0;
}

double DeviceOrientationEvent::gamma(bool& isNull) const {
  if (m_orientation->canProvideGamma())
    return m_orientation->gamma();

  isNull = true;
  return 0;
}

bool DeviceOrientationEvent::absolute() const {
  return m_orientation->absolute();
}

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

DEFINE_TRACE(DeviceOrientationEvent) {
  visitor->trace(m_orientation);
  Event::trace(visitor);
}

}  // namespace blink