/*

 * Copyright (C) 2010 Apple Inc. All rights reserved.

 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)

 *

 * 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 "RunLoop.h"

#include "WorkItem.h"

#include <QApplication>

#include <QAbstractEventDispatcher>

#include <QObject>

#include <QMetaMethod>

#include <QMetaObject>

#include <QTimerEvent>

class RunLoop::TimerObject : public QObject

{

    Q_OBJECT

public:

    TimerObject(RunLoop* runLoop) : m_runLoop(runLoop)

    {

        int methodIndex = metaObject()->indexOfMethod("performWork()");

        m_method = metaObject()->method(methodIndex);

    }

    Q_SLOT void performWork() { m_runLoop->performWork(); }

    inline void wakeUp() { m_method.invoke(this, Qt::QueuedConnection); }

protected:

    virtual void timerEvent(QTimerEvent* event)

    {

        RunLoop::TimerBase::timerFired(m_runLoop, event->timerId());

    }

private:

    RunLoop* m_runLoop;

    QMetaMethod m_method;

};

void RunLoop::run()

{

    QCoreApplication::exec();

}

void RunLoop::stop()

{

    // implement

}

RunLoop::RunLoop()

    : m_timerObject(new TimerObject(this))

{

}

RunLoop::~RunLoop()

{

    delete m_timerObject;

}

void RunLoop::wakeUp()

{

    m_timerObject->wakeUp();

}

// RunLoop::Timer

void RunLoop::TimerBase::timerFired(RunLoop* runLoop, int ID)

{

    TimerMap::iterator it = runLoop->m_activeTimers.find(ID);

    ASSERT(it != runLoop->m_activeTimers.end());

    TimerBase* timer = it->second;

    // FIMXE: Support repeating timers.

    timer->stop();

    timer->fired();

}

RunLoop::TimerBase::TimerBase(RunLoop* runLoop)

    : m_runLoop(runLoop)

    , m_ID(0)

{

}

RunLoop::TimerBase::~TimerBase()

{

    stop();

}

void RunLoop::TimerBase::start(double nextFireInterval, double /*repeatInterval*/)

{

    // FIMXE: Support repeating timers.

    stop();

    int millis = static_cast<int>(nextFireInterval * 1000);

    m_ID = m_runLoop->m_timerObject->startTimer(millis);

    ASSERT(m_ID);

    m_runLoop->m_activeTimers.set(m_ID, this);

}

void RunLoop::TimerBase::stop()

{

    if (!m_ID)

        return;

    TimerMap::iterator it = m_runLoop->m_activeTimers.find(m_ID);

    if (it == m_runLoop->m_activeTimers.end())

        return;

    m_runLoop->m_activeTimers.remove(it);

    m_runLoop->m_timerObject->killTimer(m_ID);

    m_ID = 0;

}

bool RunLoop::TimerBase::isActive() const

{

    return m_ID;

}

#include "RunLoopQt.moc"