/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** General Public License version 2.1 requirements will be met:
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
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** $QT_END_LICENSE$
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****************************************************************************/
#include "qwindowsysteminterface_qpa.h"
#include "qwindowsysteminterface_qpa_p.h"
#include "qapplication_p.h"
#include <QAbstractEventDispatcher>

QT_BEGIN_NAMESPACE


QTime QWindowSystemInterfacePrivate::eventTime;

//------------------------------------------------------------
//
// Callback functions for plugins:
//

QList<QWindowSystemInterfacePrivate::WindowSystemEvent *> QWindowSystemInterfacePrivate::windowSystemEventQueue;
QMutex QWindowSystemInterfacePrivate::queueMutex;

extern QPointer<QWidget> qt_last_mouse_receiver;


void QWindowSystemInterface::handleEnterEvent(QWidget *tlw)
{
    if (tlw) {
        QWidgetData *data = qt_qwidget_data(tlw);
        if (data->in_destructor)
            return;

        QWindowSystemInterfacePrivate::EnterEvent *e = new QWindowSystemInterfacePrivate::EnterEvent(tlw);
        QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
    }
}

void QWindowSystemInterface::handleLeaveEvent(QWidget *tlw)
{
    if (tlw) {
        QWidgetData *data = qt_qwidget_data(tlw);
        if (data->in_destructor)
            return;
    }
    QWindowSystemInterfacePrivate::LeaveEvent *e = new QWindowSystemInterfacePrivate::LeaveEvent(tlw);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}

void QWindowSystemInterface::handleWindowActivated(QWidget *tlw)
{
    QWindowSystemInterfacePrivate::ActivatedWindowEvent *e = new QWindowSystemInterfacePrivate::ActivatedWindowEvent(tlw);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}

void QWindowSystemInterface::handleGeometryChange(QWidget *tlw, const QRect &newRect)
{
    if (tlw) {
        QWidgetData *data = qt_qwidget_data(tlw);
        if (data->in_destructor)
            return;
    }
    QWindowSystemInterfacePrivate::GeometryChangeEvent *e = new QWindowSystemInterfacePrivate::GeometryChangeEvent(tlw,newRect);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}


void QWindowSystemInterface::handleCloseEvent(QWidget *tlw)
{
    if (tlw) {
        QWindowSystemInterfacePrivate::CloseEvent *e =
                new QWindowSystemInterfacePrivate::CloseEvent(tlw);
        QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
    }
}

/*!

\a tlw == 0 means that \a ev is in global coords only


*/
void QWindowSystemInterface::handleMouseEvent(QWidget *w, const QPoint & local, const QPoint & global, Qt::MouseButtons b) {
    unsigned long time = QWindowSystemInterfacePrivate::eventTime.elapsed();
    handleMouseEvent(w, time, local, global, b);
}

void QWindowSystemInterface::handleMouseEvent(QWidget *tlw, ulong timestamp, const QPoint & local, const QPoint & global, Qt::MouseButtons b)
{
    if (tlw) {
        QWidgetData *data = qt_qwidget_data(tlw);
        if (data->in_destructor)
            tlw = 0;
    }
    QWindowSystemInterfacePrivate::MouseEvent * e =
            new QWindowSystemInterfacePrivate::MouseEvent(tlw, timestamp, local, global, b);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}

void QWindowSystemInterface::handleKeyEvent(QWidget *w, QEvent::Type t, int k, Qt::KeyboardModifiers mods, const QString & text, bool autorep, ushort count) {
    unsigned long time = QWindowSystemInterfacePrivate::eventTime.elapsed();
    handleKeyEvent(w, time, t, k, mods, text, autorep, count);
}

void QWindowSystemInterface::handleKeyEvent(QWidget *tlw, ulong timestamp, QEvent::Type t, int k, Qt::KeyboardModifiers mods, const QString & text, bool autorep, ushort count)
{
    if (tlw) {
        QWidgetData *data = qt_qwidget_data(tlw);
        if (data->in_destructor)
            tlw = 0;
    }

    QWindowSystemInterfacePrivate::KeyEvent * e =
            new QWindowSystemInterfacePrivate::KeyEvent(tlw, timestamp, t, k, mods, text, autorep, count);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}

void QWindowSystemInterface::handleExtendedKeyEvent(QWidget *w, QEvent::Type type, int key, Qt::KeyboardModifiers modifiers,
                                                    quint32 nativeScanCode, quint32 nativeVirtualKey,
                                                    quint32 nativeModifiers,
                                                    const QString& text, bool autorep,
                                                    ushort count)
{
    unsigned long time = QWindowSystemInterfacePrivate::eventTime.elapsed();
    handleExtendedKeyEvent(w, time, type, key, modifiers, nativeScanCode, nativeVirtualKey, nativeModifiers,
                           text, autorep, count);
}

void QWindowSystemInterface::handleExtendedKeyEvent(QWidget *tlw, ulong timestamp, QEvent::Type type, int key,
                                                    Qt::KeyboardModifiers modifiers,
                                                    quint32 nativeScanCode, quint32 nativeVirtualKey,
                                                    quint32 nativeModifiers,
                                                    const QString& text, bool autorep,
                                                    ushort count)
{
    if (tlw) {
        QWidgetData *data = qt_qwidget_data(tlw);
        if (data->in_destructor)
            tlw = 0;
    }

    QWindowSystemInterfacePrivate::KeyEvent * e =
            new QWindowSystemInterfacePrivate::KeyEvent(tlw, timestamp, type, key, modifiers,
                nativeScanCode, nativeVirtualKey, nativeModifiers, text, autorep, count);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}

void QWindowSystemInterface::handleWheelEvent(QWidget *w, const QPoint & local, const QPoint & global, int d, Qt::Orientation o) {
    unsigned long time = QWindowSystemInterfacePrivate::eventTime.elapsed();
    handleWheelEvent(w, time, local, global, d, o);
}

void QWindowSystemInterface::handleWheelEvent(QWidget *tlw, ulong timestamp, const QPoint & local, const QPoint & global, int d, Qt::Orientation o)
{
    if (tlw) {
        QWidgetData *data = qt_qwidget_data(tlw);
        if (data->in_destructor)
            tlw = 0;
    }

    QWindowSystemInterfacePrivate::WheelEvent *e =
            new QWindowSystemInterfacePrivate::WheelEvent(tlw, timestamp, local, global, d, o);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}

int QWindowSystemInterfacePrivate::windowSystemEventsQueued()
{
    queueMutex.lock();
    int ret = windowSystemEventQueue.count();
    queueMutex.unlock();
    return ret;
}

QWindowSystemInterfacePrivate::WindowSystemEvent * QWindowSystemInterfacePrivate::getWindowSystemEvent()
{
    queueMutex.lock();
    QWindowSystemInterfacePrivate::WindowSystemEvent *ret;
    if (windowSystemEventQueue.isEmpty())
        ret = 0;
    else
        ret = windowSystemEventQueue.takeFirst();
    queueMutex.unlock();
    return ret;
}

void QWindowSystemInterfacePrivate::queueWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent *ev)
{
    queueMutex.lock();
    windowSystemEventQueue.append(ev);
    queueMutex.unlock();

    QAbstractEventDispatcher *dispatcher = QApplicationPrivate::qt_qpa_core_dispatcher();
    if (dispatcher)
        dispatcher->wakeUp();
}

void QWindowSystemInterface::handleTouchEvent(QWidget *w, QEvent::Type type, QTouchEvent::DeviceType devType, const QList<struct TouchPoint> &points) {
    unsigned long time = QWindowSystemInterfacePrivate::eventTime.elapsed();
    handleTouchEvent(w, time, type, devType, points);
}

void QWindowSystemInterface::handleTouchEvent(QWidget *tlw, ulong timestamp, QEvent::Type type, QTouchEvent::DeviceType devType, const QList<struct TouchPoint> &points)
{
    if (!points.size()) // Touch events must have at least one point
        return;

    QList<QTouchEvent::TouchPoint> touchPoints;
    Qt::TouchPointStates states;
    QTouchEvent::TouchPoint p;

    QList<struct TouchPoint>::const_iterator point = points.constBegin();
    QList<struct TouchPoint>::const_iterator end = points.constEnd();
    while (point != end) {
        p.setId(point->id);
        p.setPressure(point->pressure);
        states |= point->state;
        Qt::TouchPointStates state = point->state;
        if (point->isPrimary) {
            state |= Qt::TouchPointPrimary;
        }
        p.setState(state);
        p.setRect(point->area);
        p.setScreenPos(point->area.center());
        p.setNormalizedPos(point->normalPosition);

        touchPoints.append(p);
        ++point;
    }

    QWindowSystemInterfacePrivate::TouchEvent *e =
            new QWindowSystemInterfacePrivate::TouchEvent(tlw, timestamp, type, devType, touchPoints);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}

void QWindowSystemInterface::handleScreenGeometryChange(int screenIndex)
{
    QWindowSystemInterfacePrivate::ScreenGeometryEvent *e =
            new QWindowSystemInterfacePrivate::ScreenGeometryEvent(screenIndex);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}

void QWindowSystemInterface::handleScreenAvailableGeometryChange(int screenIndex)
{
    QWindowSystemInterfacePrivate::ScreenAvailableGeometryEvent *e =
            new QWindowSystemInterfacePrivate::ScreenAvailableGeometryEvent(screenIndex);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}

void QWindowSystemInterface::handleScreenCountChange(int count)
{
    QWindowSystemInterfacePrivate::ScreenCountEvent *e =
            new QWindowSystemInterfacePrivate::ScreenCountEvent(count);
    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
}

QT_END_NAMESPACE