root/Source/modules/device_orientation/DeviceOrientationController.cpp

DEFINITIONS

1. DOMWindowLifecycleObserver
2. didChangeDeviceOrientation
3. supplementName
4. from
5. lastData
6. hasLastData
7. getLastEvent
8. registerWithDispatcher
9. unregisterWithDispatcher
10. isNullEvent
11. didAddEventListener
12. didRemoveEventListener
13. didRemoveAllEventListeners
14. setOverride
15. clearOverride

/*
 * Copyright 2010 Apple Inc. All rights reserved.
 * Copyright (C) 2012 Samsung Electronics. 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 "modules/device_orientation/DeviceOrientationController.h"

#include "RuntimeEnabledFeatures.h"
#include "core/dom/Document.h"
#include "core/page/Page.h"
#include "modules/device_orientation/DeviceOrientationData.h"
#include "modules/device_orientation/DeviceOrientationDispatcher.h"
#include "modules/device_orientation/DeviceOrientationEvent.h"

namespace WebCore {

DeviceOrientationController::DeviceOrientationController(Document& document)
    : DeviceSensorEventController(document)
    , DOMWindowLifecycleObserver(document.domWindow())
{
}

DeviceOrientationController::~DeviceOrientationController()
{
    stopUpdating();
}

void DeviceOrientationController::didChangeDeviceOrientation(DeviceOrientationData* deviceOrientationData)
{
    if (m_overrideOrientationData)
        return;
    dispatchDeviceEvent(DeviceOrientationEvent::create(EventTypeNames::deviceorientation, deviceOrientationData));
}

const char* DeviceOrientationController::supplementName()
{
    return "DeviceOrientationController";
}

DeviceOrientationController& DeviceOrientationController::from(Document& document)
{
    DeviceOrientationController* controller = static_cast<DeviceOrientationController*>(DocumentSupplement::from(document, supplementName()));
    if (!controller) {
        controller = new DeviceOrientationController(document);
        DocumentSupplement::provideTo(document, supplementName(), adoptPtr(controller));
    }
    return *controller;
}

DeviceOrientationData* DeviceOrientationController::lastData()
{
    return m_overrideOrientationData ? m_overrideOrientationData.get() : DeviceOrientationDispatcher::instance().latestDeviceOrientationData();
}

bool DeviceOrientationController::hasLastData()
{
    return lastData();
}

PassRefPtrWillBeRawPtr<Event> DeviceOrientationController::getLastEvent()
{
    return DeviceOrientationEvent::create(EventTypeNames::deviceorientation, lastData());
}

void DeviceOrientationController::registerWithDispatcher()
{
    DeviceOrientationDispatcher::instance().addDeviceOrientationController(this);
}

void DeviceOrientationController::unregisterWithDispatcher()
{
    DeviceOrientationDispatcher::instance().removeDeviceOrientationController(this);
}

bool DeviceOrientationController::isNullEvent(Event* event)
{
    DeviceOrientationEvent* orientationEvent = toDeviceOrientationEvent(event);
    return !orientationEvent->orientation()->canProvideEventData();
}

void DeviceOrientationController::didAddEventListener(DOMWindow* window, const AtomicString& eventType)
{
    if (eventType == EventTypeNames::deviceorientation && RuntimeEnabledFeatures::deviceOrientationEnabled()) {
        if (page() && page()->visibilityState() == PageVisibilityStateVisible)
            startUpdating();
        m_hasEventListener = true;
    }
}

void DeviceOrientationController::didRemoveEventListener(DOMWindow* window, const AtomicString& eventType)
{
    if (eventType == EventTypeNames::deviceorientation) {
        stopUpdating();
        m_hasEventListener = false;
    }
}

void DeviceOrientationController::didRemoveAllEventListeners(DOMWindow* window)
{
    stopUpdating();
    m_hasEventListener = false;
}

void DeviceOrientationController::setOverride(DeviceOrientationData* deviceOrientationData)
{
    m_overrideOrientationData.clear();
    didChangeDeviceOrientation(deviceOrientationData);
    m_overrideOrientationData = deviceOrientationData;
}

void DeviceOrientationController::clearOverride()
{
    if (!m_overrideOrientationData)
        return;
    m_overrideOrientationData.clear();
    DeviceOrientationData* orientation = lastData();
    if (orientation)
        didChangeDeviceOrientation(orientation);
}

} // namespace WebCore