/*

 * Copyright (C) 2009 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 "GeolocationController.h"

#include "GeolocationPosition.h"

#if ENABLE(CLIENT_BASED_GEOLOCATION)

#include "GeolocationControllerClient.h"

namespace WebCore {

GeolocationController::GeolocationController(Page* page, GeolocationControllerClient* client)

    : m_page(page)

    , m_client(client)

{

}

GeolocationController::~GeolocationController()

{

    if (m_client)

        m_client->geolocationDestroyed();

}

void GeolocationController::addObserver(Geolocation* observer)

{

    // This may be called multiple times with the same observer, though removeObserver()

    // is called only once with each.

    if (m_observers.contains(observer))

        return;

    bool wasEmpty = m_observers.isEmpty();

    m_observers.add(observer);

    if (wasEmpty && m_client)

        m_client->startUpdating();

}

void GeolocationController::removeObserver(Geolocation* observer)

{

    if (!m_observers.contains(observer))

        return;

    m_observers.remove(observer);

    if (m_observers.isEmpty() && m_client)

        m_client->stopUpdating();

}

void GeolocationController::positionChanged(GeolocationPosition* position)

{

    m_lastPosition = position;

    Vector<RefPtr<Geolocation> > observersVector;

    copyToVector(m_observers, observersVector);

    for (size_t i = 0; i < observersVector.size(); ++i)

        observersVector[i]->positionChanged();

}

void GeolocationController::errorOccurred(GeolocationError* error)

{

    Vector<RefPtr<Geolocation> > observersVector;

    copyToVector(m_observers, observersVector);

    for (size_t i = 0; i < observersVector.size(); ++i)

        observersVector[i]->setError(error);

}

GeolocationPosition* GeolocationController::lastPosition()

{

    if (m_lastPosition.get())

        return m_lastPosition.get();

    if (!m_client)

        return 0;

    return m_client->lastPosition();

}

} // namespace WebCore

#endif // ENABLE(CLIENT_BASED_GEOLOCATION)