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/*
* Copyright 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:
* * 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
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DeviceMotionController.h"
#include "DeviceMotionClient.h"
#include "DeviceMotionData.h"
#include "DeviceMotionEvent.h"
namespace WebCore {
DeviceMotionController::DeviceMotionController(DeviceMotionClient* client)
: m_client(client)
, m_timer(this, &DeviceMotionController::timerFired)
{
ASSERT(m_client);
m_client->setController(this);
}
DeviceMotionController::~DeviceMotionController()
{
m_client->deviceMotionControllerDestroyed();
}
void DeviceMotionController::timerFired(Timer<DeviceMotionController>* timer)
{
ASSERT_UNUSED(timer, timer == &m_timer);
ASSERT(!m_client || m_client->currentDeviceMotion());
m_timer.stop();
RefPtr<DeviceMotionData> deviceMotionData = m_client ? m_client->currentDeviceMotion() : DeviceMotionData::create();
RefPtr<DeviceMotionEvent> event = DeviceMotionEvent::create(eventNames().devicemotionEvent, deviceMotionData.get());
Vector<RefPtr<DOMWindow> > listenersVector;
copyToVector(m_newListeners, listenersVector);
m_newListeners.clear();
for (size_t i = 0; i < listenersVector.size(); ++i)
listenersVector[i]->dispatchEvent(event);
}
void DeviceMotionController::addListener(DOMWindow* window)
{
// If no client is present or the client already has motion data,
// immediately trigger an asynchronous response.
if (!m_client || m_client->currentDeviceMotion()) {
m_newListeners.add(window);
if (!m_timer.isActive())
m_timer.startOneShot(0);
}
bool wasEmpty = m_listeners.isEmpty();
m_listeners.add(window);
if (wasEmpty && m_client)
m_client->startUpdating();
}
void DeviceMotionController::removeListener(DOMWindow* window)
{
m_listeners.remove(window);
m_newListeners.remove(window);
if (m_listeners.isEmpty() && m_client)
m_client->stopUpdating();
}
void DeviceMotionController::removeAllListeners(DOMWindow* window)
{
// May be called with a DOMWindow that's not a listener.
if (!m_listeners.contains(window))
return;
m_listeners.removeAll(window);
m_newListeners.remove(window);
if (m_listeners.isEmpty() && m_client)
m_client->stopUpdating();
}
void DeviceMotionController::didChangeDeviceMotion(DeviceMotionData* deviceMotionData)
{
RefPtr<DeviceMotionEvent> event = DeviceMotionEvent::create(eventNames().devicemotionEvent, deviceMotionData);
Vector<RefPtr<DOMWindow> > listenersVector;
copyToVector(m_listeners, listenersVector);
for (size_t i = 0; i < listenersVector.size(); ++i)
listenersVector[i]->dispatchEvent(event);
}
} // namespace WebCore
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