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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** 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: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QWINDOWSYSTEMINTERFACE_P_H
#define QWINDOWSYSTEMINTERFACE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "qwindowsysteminterface.h"

#include <QElapsedTimer>
#include <QPointer>
#include <QMutex>
#include <QList>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

class Q_GUI_EXPORT QWindowSystemInterfacePrivate {
public:
    enum EventType {
        Close,
        GeometryChange,
        Enter,
        Leave,
        ActivatedWindow,
        WindowStateChanged,
        Mouse,
        FrameStrutMouse,
        Wheel,
        Key,
        Touch,
        ScreenOrientation,
        ScreenGeometry,
        ScreenAvailableGeometry,
        ScreenLogicalDotsPerInch,
        ScreenRefreshRate,
        ThemeChange,
        Expose,
        FileOpen,
        Tablet,
        TabletEnterProximity,
        TabletLeaveProximity,
        PlatformPanel,
        ContextMenu
    };

    class WindowSystemEvent {
    public:
        explicit WindowSystemEvent(EventType t)
            : type(t), synthetic(false) { }
        virtual ~WindowSystemEvent() { }
        EventType type;
        bool synthetic;
    };

    class CloseEvent : public WindowSystemEvent {
    public:
        explicit CloseEvent(QWindow *w)
            : WindowSystemEvent(Close), window(w) { }
        QPointer<QWindow> window;
    };

    class GeometryChangeEvent : public WindowSystemEvent {
    public:
        GeometryChangeEvent(QWindow *tlw, const QRect &newGeometry)
            : WindowSystemEvent(GeometryChange), tlw(tlw), newGeometry(newGeometry)
        { }
        QPointer<QWindow> tlw;
        QRect newGeometry;
    };

    class EnterEvent : public WindowSystemEvent {
    public:
        explicit EnterEvent(QWindow *enter)
            : WindowSystemEvent(Enter), enter(enter)
        { }
        QPointer<QWindow> enter;
    };

    class LeaveEvent : public WindowSystemEvent {
    public:
        explicit LeaveEvent(QWindow *leave)
            : WindowSystemEvent(Leave), leave(leave)
        { }
        QPointer<QWindow> leave;
    };

    class ActivatedWindowEvent : public WindowSystemEvent {
    public:
        explicit ActivatedWindowEvent(QWindow *activatedWindow)
            : WindowSystemEvent(ActivatedWindow), activated(activatedWindow)
        { }
        QPointer<QWindow> activated;
    };

    class WindowStateChangedEvent : public WindowSystemEvent {
    public:
        WindowStateChangedEvent(QWindow *_window, Qt::WindowState _newState)
            : WindowSystemEvent(WindowStateChanged), window(_window), newState(_newState)
        { }

        QPointer<QWindow> window;
        Qt::WindowState newState;
    };

    class UserEvent : public WindowSystemEvent {
    public:
        UserEvent(QWindow * w, ulong time, EventType t)
            : WindowSystemEvent(t), window(w), nullWindow(w == 0), timestamp(time) { }
        QPointer<QWindow> window;
        bool nullWindow;
        unsigned long timestamp;
    };

    class InputEvent: public UserEvent {
    public:
        InputEvent(QWindow * w, ulong time, EventType t, Qt::KeyboardModifiers mods)
            : UserEvent(w, time, t), modifiers(mods) {}
        Qt::KeyboardModifiers modifiers;
    };

    class MouseEvent : public InputEvent {
    public:
        MouseEvent(QWindow * w, ulong time, const QPointF & local, const QPointF & global,
                   Qt::MouseButtons b, Qt::KeyboardModifiers mods)
            : InputEvent(w, time, Mouse, mods), localPos(local), globalPos(global), buttons(b) { }
        MouseEvent(QWindow * w, ulong time, EventType t, const QPointF & local, const QPointF & global,
                   Qt::MouseButtons b, Qt::KeyboardModifiers mods)
            : InputEvent(w, time, t, mods), localPos(local), globalPos(global), buttons(b) { }
        QPointF localPos;
        QPointF globalPos;
        Qt::MouseButtons buttons;
    };

    class WheelEvent : public InputEvent {
    public:
        WheelEvent(QWindow *w, ulong time, const QPointF & local, const QPointF & global, QPoint pixelD, QPoint angleD, int qt4D, Qt::Orientation qt4O,
                   Qt::KeyboardModifiers mods)
            : InputEvent(w, time, Wheel, mods), pixelDelta(pixelD), angleDelta(angleD), qt4Delta(qt4D), qt4Orientation(qt4O), localPos(local), globalPos(global) { }
        QPoint pixelDelta;
        QPoint angleDelta;
        int qt4Delta;
        Qt::Orientation qt4Orientation;
        QPointF localPos;
        QPointF globalPos;
    };

    class KeyEvent : public InputEvent {
    public:
        KeyEvent(QWindow *w, ulong time, QEvent::Type t, int k, Qt::KeyboardModifiers mods, const QString & text = QString(), bool autorep = false, ushort count = 1)
            :InputEvent(w, time, Key, mods), key(k), unicode(text), repeat(autorep),
             repeatCount(count), keyType(t),
             nativeScanCode(0), nativeVirtualKey(0), nativeModifiers(0) { }
        KeyEvent(QWindow *w, ulong time, QEvent::Type t, int k, Qt::KeyboardModifiers mods,
                 quint32 nativeSC, quint32 nativeVK, quint32 nativeMods,
                 const QString & text = QString(), bool autorep = false, ushort count = 1)
            :InputEvent(w, time, Key, mods), key(k), unicode(text), repeat(autorep),
             repeatCount(count), keyType(t),
             nativeScanCode(nativeSC), nativeVirtualKey(nativeVK), nativeModifiers(nativeMods) { }
        int key;
        QString unicode;
        bool repeat;
        ushort repeatCount;
        QEvent::Type keyType;
        quint32 nativeScanCode;
        quint32 nativeVirtualKey;
        quint32 nativeModifiers;
    };

    class TouchEvent : public InputEvent {
    public:
        TouchEvent(QWindow *w, ulong time, QEvent::Type t, QTouchDevice *dev,
                   const QList<QTouchEvent::TouchPoint> &p, Qt::KeyboardModifiers mods)
            :InputEvent(w, time, Touch, mods), device(dev), points(p), touchType(t) { }
        QTouchDevice *device;
        QList<QTouchEvent::TouchPoint> points;
        QEvent::Type touchType;
    };

    class ScreenOrientationEvent : public WindowSystemEvent {
    public:
        ScreenOrientationEvent(QScreen *s, Qt::ScreenOrientation o)
            : WindowSystemEvent(ScreenOrientation), screen(s), orientation(o) { }
        QPointer<QScreen> screen;
        Qt::ScreenOrientation orientation;
    };

    class ScreenGeometryEvent : public WindowSystemEvent {
    public:
        ScreenGeometryEvent(QScreen *s, const QRect &g)
            : WindowSystemEvent(ScreenGeometry), screen(s), geometry(g) { }
        QPointer<QScreen> screen;
        QRect geometry;
    };

    class ScreenAvailableGeometryEvent : public WindowSystemEvent {
    public:
        ScreenAvailableGeometryEvent(QScreen *s, const QRect &g)
            : WindowSystemEvent(ScreenAvailableGeometry), screen(s), availableGeometry(g) { }
        QPointer<QScreen> screen;
        QRect availableGeometry;
    };

    class ScreenLogicalDotsPerInchEvent : public WindowSystemEvent {
    public:
        ScreenLogicalDotsPerInchEvent(QScreen *s, qreal dx, qreal dy)
            : WindowSystemEvent(ScreenLogicalDotsPerInch), screen(s), dpiX(dx), dpiY(dy) { }
        QPointer<QScreen> screen;
        qreal dpiX;
        qreal dpiY;
    };

    class ScreenRefreshRateEvent : public WindowSystemEvent {
    public:
        ScreenRefreshRateEvent(QScreen *s, qreal r)
            : WindowSystemEvent(ScreenRefreshRate), screen(s), rate(r) { }
        QPointer<QScreen> screen;
        qreal rate;
    };

    class ThemeChangeEvent : public WindowSystemEvent {
    public:
        explicit ThemeChangeEvent(QWindow * w)
            : WindowSystemEvent(ThemeChange), window(w) { }
        QPointer<QWindow> window;
    };

    class ExposeEvent : public WindowSystemEvent {
    public:
        ExposeEvent(QWindow *exposed, const QRegion &region);
        QPointer<QWindow> exposed;
        bool isExposed;
        QRegion region;
    };

    class FileOpenEvent : public WindowSystemEvent {
    public:
        FileOpenEvent(const QString& fileName)
            : WindowSystemEvent(FileOpen), fileName(fileName)
        { }
        QString fileName;
    };

    class TabletEvent : public InputEvent {
    public:
        static void handleTabletEvent(QWindow *w, bool down, const QPointF &local, const QPointF &global,
                                      int device, int pointerType, qreal pressure, int xTilt, int yTilt,
                                      qreal tangentialPressure, qreal rotation, int z, qint64 uid,
                                      Qt::KeyboardModifiers modifiers = Qt::NoModifier);

        TabletEvent(QWindow *w, ulong time, bool down, const QPointF &local, const QPointF &global,
                    int device, int pointerType, qreal pressure, int xTilt, int yTilt, qreal tpressure,
                    qreal rotation, int z, qint64 uid, Qt::KeyboardModifiers mods)
            : InputEvent(w, time, Tablet, Qt::NoModifier),
              down(down), local(local), global(global), device(device), pointerType(pointerType),
              pressure(pressure), xTilt(xTilt), yTilt(yTilt), tangentialPressure(tpressure),
              rotation(rotation), z(z), uid(uid), mods(mods) { }
        bool down;
        QPointF local;
        QPointF global;
        int device;
        int pointerType;
        qreal pressure;
        int xTilt;
        int yTilt;
        qreal tangentialPressure;
        qreal rotation;
        int z;
        qint64 uid;
        Qt::KeyboardModifiers mods;
    };

    class TabletEnterProximityEvent : public InputEvent {
    public:
        TabletEnterProximityEvent(ulong time, int device, int pointerType, qint64 uid)
            : InputEvent(0, time, TabletEnterProximity, Qt::NoModifier),
              device(device), pointerType(pointerType), uid(uid) { }
        int device;
        int pointerType;
        qint64 uid;
    };

    class TabletLeaveProximityEvent : public InputEvent {
    public:
        TabletLeaveProximityEvent(ulong time, int device, int pointerType, qint64 uid)
            : InputEvent(0, time, TabletLeaveProximity, Qt::NoModifier),
              device(device), pointerType(pointerType), uid(uid) { }
        int device;
        int pointerType;
        qint64 uid;
    };

    class PlatformPanelEvent : public WindowSystemEvent {
    public:
        explicit PlatformPanelEvent(QWindow *w)
            : WindowSystemEvent(PlatformPanel), window(w) { }
        QPointer<QWindow> window;
    };

#ifndef QT_NO_CONTEXTMENU
    class ContextMenuEvent : public WindowSystemEvent {
    public:
        explicit ContextMenuEvent(QWindow *w, bool mouseTriggered, const QPoint &pos,
                                  const QPoint &globalPos, Qt::KeyboardModifiers modifiers)
            : WindowSystemEvent(ContextMenu), window(w), mouseTriggered(mouseTriggered), pos(pos),
              globalPos(globalPos), modifiers(modifiers) { }
        QPointer<QWindow> window;
        bool mouseTriggered;
        QPoint pos;       // Only valid if triggered by mouse
        QPoint globalPos; // Only valid if triggered by mouse
        Qt::KeyboardModifiers modifiers;
    };
#endif

    class WindowSystemEventList {
        QList<WindowSystemEvent *> impl;
        mutable QMutex mutex;
    public:
        WindowSystemEventList() : impl(), mutex() {}
        ~WindowSystemEventList()
        { const QMutexLocker locker(&mutex); qDeleteAll(impl); impl.clear(); }

        void prepend(WindowSystemEvent *e)
        { const QMutexLocker locker(&mutex); impl.prepend(e); }
        WindowSystemEvent *takeFirstOrReturnNull()
        { const QMutexLocker locker(&mutex); return impl.empty() ? 0 : impl.takeFirst(); }
        void append(WindowSystemEvent *e)
        { const QMutexLocker locker(&mutex); impl.append(e); }
        int count() const
        { const QMutexLocker locker(&mutex); return impl.count(); }
        WindowSystemEvent *peekAtFirstOfType(EventType t) const
        {
            const QMutexLocker locker(&mutex);
            for (int i = 0; i < impl.size(); ++i) {
                if (impl.at(i)->type == t)
                    return impl.at(i);
            }
            return 0;
        }
        void remove(const WindowSystemEvent *e)
        {
            const QMutexLocker locker(&mutex);
            for (int i = 0; i < impl.size(); ++i) {
                if (impl.at(i) == e) {
                    impl.removeAt(i);
                    break;
                }
            }
        }
    private:
        Q_DISABLE_COPY(WindowSystemEventList);
    };

    static WindowSystemEventList windowSystemEventQueue;

    static int windowSystemEventsQueued();
    static WindowSystemEvent *getWindowSystemEvent();
    static WindowSystemEvent *peekWindowSystemEvent(EventType t);
    static void removeWindowSystemEvent(WindowSystemEvent *event);
    static void handleWindowSystemEvent(WindowSystemEvent *ev);

    static QElapsedTimer eventTime;
    static bool synchronousWindowsSystemEvents;

    static QList<QTouchEvent::TouchPoint> convertTouchPoints(const QList<QWindowSystemInterface::TouchPoint> &points, QEvent::Type *type);
};

QT_END_HEADER
QT_END_NAMESPACE

#endif // QWINDOWSYSTEMINTERFACE_P_H