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**

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** This file is part of the QtGui module of the Qt Toolkit.

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** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** 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

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**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

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****************************************************************************/

#include "qvariant.h"

#include "qbitmap.h"

#include "qbrush.h"

#include "qcolor.h"

#include "qcursor.h"

#include "qdatastream.h"

#include "qdebug.h"

#include "qfont.h"

#include "qicon.h"

#include "qimage.h"

#include "qkeysequence.h"

#include "qtransform.h"

#include "qmatrix.h"

#include "qpalette.h"

#include "qpen.h"

#include "qpixmap.h"

#include "qpolygon.h"

#include "qregion.h"

#include "qsizepolicy.h"

#include "qtextformat.h"

#include "qmatrix4x4.h"

#include "qvector2d.h"

#include "qvector3d.h"

#include "qvector4d.h"

#include "qquaternion.h"

#include "private/qvariant_p.h"

QT_BEGIN_NAMESPACE

#ifdef QT3_SUPPORT

extern QDataStream &qt_stream_out_qcolorgroup(QDataStream &s, const QColorGroup &g);

extern QDataStream &qt_stream_in_qcolorgroup(QDataStream &s, QColorGroup &g);

#endif

Q_CORE_EXPORT const QVariant::Handler *qcoreVariantHandler();

static void construct(QVariant::Private *x, const void *copy)

{

    switch (x->type) {

    case QVariant::Bitmap:

        v_construct<QBitmap>(x, copy);

        break;

    case QVariant::Region:

        v_construct<QRegion>(x, copy);

        break;

    case QVariant::Polygon:

        v_construct<QPolygon>(x, copy);

        break;

    case QVariant::Font:

        v_construct<QFont>(x, copy);

        break;

    case QVariant::Pixmap:

        v_construct<QPixmap>(x, copy);

        break;

    case QVariant::Image:

        v_construct<QImage>(x, copy);

        break;

    case QVariant::Brush:

        v_construct<QBrush>(x, copy);

        break;

    case QVariant::Color:

        v_construct<QColor>(x, copy);

        break;

    case QVariant::Palette:

        v_construct<QPalette>(x, copy);

        break;

#ifdef QT3_SUPPORT

    case QVariant::ColorGroup:

        v_construct<QColorGroup>(x, copy);

        break;

#endif

#ifndef QT_NO_ICON

    case QVariant::Icon:

        v_construct<QIcon>(x, copy);

        break;

#endif

    case QVariant::Matrix:

        v_construct<QMatrix>(x, copy);

        break;

    case QVariant::Transform:

        v_construct<QTransform>(x, copy);

        break;

    case QVariant::TextFormat:

        v_construct<QTextFormat>(x, copy);

        break;

    case QVariant::TextLength:

        v_construct<QTextLength>(x, copy);

        break;

#ifndef QT_NO_SHORTCUT

    case QVariant::KeySequence:

        v_construct<QKeySequence>(x, copy);

        break;

#endif

    case QVariant::Pen:

        v_construct<QPen>(x, copy);

        break;

    case QVariant::SizePolicy:

        v_construct<QSizePolicy>(x, copy);

        break;

#ifndef QT_NO_CURSOR

    case QVariant::Cursor:

        v_construct<QCursor>(x, copy);

        break;

#endif

    case 62: {

        // small 'trick' to let a QVariant(Qt::blue) create a variant

        // of type QColor

        x->type = QVariant::Color;

        QColor color(*reinterpret_cast<const Qt::GlobalColor *>(copy));

        v_construct<QColor>(x, &color);

        break;

    }

#ifndef QT_NO_MATRIX4X4

    case QVariant::Matrix4x4:

        v_construct<QMatrix4x4>(x, copy);

        break;

#endif

#ifndef QT_NO_VECTOR2D

    case QVariant::Vector2D:

        v_construct<QVector2D>(x, copy);

        break;

#endif

#ifndef QT_NO_VECTOR3D

    case QVariant::Vector3D:

        v_construct<QVector3D>(x, copy);

        break;

#endif

#ifndef QT_NO_VECTOR4D

    case QVariant::Vector4D:

        v_construct<QVector4D>(x, copy);

        break;

#endif

#ifndef QT_NO_QUATERNION

    case QVariant::Quaternion:

        v_construct<QQuaternion>(x, copy);

        break;

#endif

    default:

        qcoreVariantHandler()->construct(x, copy);

        return;

    }

    x->is_null = !copy;

}

static void clear(QVariant::Private *d)

{

    switch (d->type) {

    case QVariant::Bitmap:

        v_clear<QBitmap>(d);

        break;

    case QVariant::Cursor:

        v_clear<QCursor>(d);

        break;

    case QVariant::Region:

        v_clear<QRegion>(d);

        break;

    case QVariant::Polygon:

        v_clear<QPolygon>(d);

        break;

    case QVariant::Font:

        v_clear<QFont>(d);

        break;

    case QVariant::Pixmap:

        v_clear<QPixmap>(d);

        break;

    case QVariant::Image:

        v_clear<QImage>(d);

        break;

    case QVariant::Brush:

        v_clear<QBrush>(d);

        break;

    case QVariant::Color:

        v_clear<QColor>(d);

        break;

    case QVariant::Palette:

        v_clear<QPalette>(d);

        break;

#ifdef QT3_SUPPORT

    case QVariant::ColorGroup:

        v_clear<QColorGroup>(d);

        break;

#endif

#ifndef QT_NO_ICON

    case QVariant::Icon:

        v_clear<QIcon>(d);

        break;

#endif

    case QVariant::Matrix:

        v_clear<QMatrix>(d);

        break;

    case QVariant::Transform:

        v_clear<QTransform>(d);

        break;

    case QVariant::TextFormat:

        v_clear<QTextFormat>(d);

        break;

    case QVariant::TextLength:

        v_clear<QTextLength>(d);

        break;

    case QVariant::SizePolicy:

        v_clear<QSizePolicy>(d);

        break;

#ifndef QT_NO_SHORTCUT

    case QVariant::KeySequence:

        v_clear<QKeySequence>(d);

        break;

#endif

    case QVariant::Pen:

        v_clear<QPen>(d);

        break;

#ifndef QT_NO_MATRIX4X4

    case QVariant::Matrix4x4:

        v_clear<QMatrix4x4>(d);

        break;

#endif

#ifndef QT_NO_VECTOR2D

    case QVariant::Vector2D:

        v_clear<QVector2D>(d);

        break;

#endif

#ifndef QT_NO_VECTOR3D

    case QVariant::Vector3D:

        v_clear<QVector3D>(d);

        break;

#endif

#ifndef QT_NO_VECTOR4D

    case QVariant::Vector4D:

        v_clear<QVector4D>(d);

        break;

#endif

#ifndef QT_NO_QUATERNION

    case QVariant::Quaternion:

        v_clear<QVector4D>(d);

        break;

#endif

    default:

        qcoreVariantHandler()->clear(d);

        return;

    }

    d->type = QVariant::Invalid;

    d->is_null = true;

    d->is_shared = false;

}

static bool isNull(const QVariant::Private *d)

{

    switch(d->type) {

    case QVariant::Bitmap:

        return v_cast<QBitmap>(d)->isNull();

    case QVariant::Region:

        return v_cast<QRegion>(d)->isEmpty();

    case QVariant::Polygon:

        return v_cast<QPolygon>(d)->isEmpty();

    case QVariant::Pixmap:

        return v_cast<QPixmap>(d)->isNull();

    case QVariant::Image:

        return v_cast<QImage>(d)->isNull();

#ifndef QT_NO_ICON

    case QVariant::Icon:

        return v_cast<QIcon>(d)->isNull();

#endif

    case QVariant::Matrix:

    case QVariant::TextFormat:

    case QVariant::TextLength:

    case QVariant::Cursor:

    case QVariant::StringList:

    case QVariant::Font:

    case QVariant::Brush:

    case QVariant::Color:

    case QVariant::Palette:

#ifdef QT3_SUPPORT

    case QVariant::ColorGroup:

#endif

    case QVariant::SizePolicy:

#ifndef QT_NO_SHORTCUT

    case QVariant::KeySequence:

#endif

    case QVariant::Pen:

#ifndef QT_NO_MATRIX4X4

    case QVariant::Matrix4x4:

#endif

        break;

#ifndef QT_NO_VECTOR2D

    case QVariant::Vector2D:

        return v_cast<QVector2D>(d)->isNull();

#endif

#ifndef QT_NO_VECTOR3D

    case QVariant::Vector3D:

        return v_cast<QVector3D>(d)->isNull();

#endif

#ifndef QT_NO_VECTOR4D

    case QVariant::Vector4D:

        return v_cast<QVector4D>(d)->isNull();

#endif

#ifndef QT_NO_QUATERNION

    case QVariant::Quaternion:

        return v_cast<QQuaternion>(d)->isNull();

#endif

    default:

        return qcoreVariantHandler()->isNull(d);

    }

    return d->is_null;

}

static bool compare(const QVariant::Private *a, const QVariant::Private *b)

{

    Q_ASSERT(a->type == b->type);

    switch(a->type) {

    case QVariant::Cursor:

#ifndef QT_NO_CURSOR

        return v_cast<QCursor>(a)->shape() == v_cast<QCursor>(b)->shape();

#endif

    case QVariant::Bitmap:

        return v_cast<QBitmap>(a)->cacheKey()

            == v_cast<QBitmap>(b)->cacheKey();

    case QVariant::Polygon:

        return *v_cast<QPolygon>(a) == *v_cast<QPolygon>(b);

    case QVariant::Region:

        return *v_cast<QRegion>(a) == *v_cast<QRegion>(b);

    case QVariant::Font:

        return *v_cast<QFont>(a) == *v_cast<QFont>(b);

    case QVariant::Pixmap:

        return v_cast<QPixmap>(a)->cacheKey() == v_cast<QPixmap>(b)->cacheKey();

    case QVariant::Image:

        return *v_cast<QImage>(a) == *v_cast<QImage>(b);

    case QVariant::Brush:

        return *v_cast<QBrush>(a) == *v_cast<QBrush>(b);

    case QVariant::Color:

        return *v_cast<QColor>(a) == *v_cast<QColor>(b);

    case QVariant::Palette:

        return *v_cast<QPalette>(a) == *v_cast<QPalette>(b);

#ifdef QT3_SUPPORT

    case QVariant::ColorGroup:

        return *v_cast<QColorGroup>(a) == *v_cast<QColorGroup>(b);

#endif

#ifndef QT_NO_ICON

    case QVariant::Icon:

        /* QIcon::operator==() cannot be reasonably implemented for QIcon,

         * so we always return false. */

        return false;

#endif

    case QVariant::Matrix:

        return *v_cast<QMatrix>(a) == *v_cast<QMatrix>(b);

    case QVariant::Transform:

        return *v_cast<QTransform>(a) == *v_cast<QTransform>(b);

    case QVariant::TextFormat:

        return *v_cast<QTextFormat>(a) == *v_cast<QTextFormat>(b);

    case QVariant::TextLength:

        return *v_cast<QTextLength>(a) == *v_cast<QTextLength>(b);

    case QVariant::SizePolicy:

        return *v_cast<QSizePolicy>(a) == *v_cast<QSizePolicy>(b);

#ifndef QT_NO_SHORTCUT

    case QVariant::KeySequence:

        return *v_cast<QKeySequence>(a) == *v_cast<QKeySequence>(b);

#endif

    case QVariant::Pen:

        return *v_cast<QPen>(a) == *v_cast<QPen>(b);

#ifndef QT_NO_MATRIX4X4

    case QVariant::Matrix4x4:

        return *v_cast<QMatrix4x4>(a) == *v_cast<QMatrix4x4>(b);

#endif

#ifndef QT_NO_VECTOR2D

    case QVariant::Vector2D:

        return *v_cast<QVector2D>(a) == *v_cast<QVector2D>(b);

#endif

#ifndef QT_NO_VECTOR3D

    case QVariant::Vector3D:

        return *v_cast<QVector3D>(a) == *v_cast<QVector3D>(b);

#endif

#ifndef QT_NO_VECTOR4D

    case QVariant::Vector4D:

        return *v_cast<QVector4D>(a) == *v_cast<QVector4D>(b);

#endif

#ifndef QT_NO_QUATERNION

    case QVariant::Quaternion:

        return *v_cast<QQuaternion>(a) == *v_cast<QQuaternion>(b);

#endif

    default:

        break;

    }

    return qcoreVariantHandler()->compare(a, b);

}

static bool convert(const QVariant::Private *d, QVariant::Type t,

                 void *result, bool *ok)

{

    switch (t) {

    case QVariant::ByteArray:

        if (d->type == QVariant::Color) {

            *static_cast<QByteArray *>(result) = v_cast<QColor>(d)->name().toLatin1();

            return true;

        }

        break;

    case QVariant::String: {

        QString *str = static_cast<QString *>(result);

        switch (d->type) {

#ifndef QT_NO_SHORTCUT

        case QVariant::KeySequence:

            *str = QString(*v_cast<QKeySequence>(d));

            return true;

#endif

        case QVariant::Font:

            *str = v_cast<QFont>(d)->toString();

            return true;

        case QVariant::Color:

            *str = v_cast<QColor>(d)->name();

            return true;

        default:

            break;

        }

        break;

    }

    case QVariant::Pixmap:

        if (d->type == QVariant::Image) {

            *static_cast<QPixmap *>(result) = QPixmap::fromImage(*v_cast<QImage>(d));

            return true;

        } else if (d->type == QVariant::Bitmap) {

            *static_cast<QPixmap *>(result) = *v_cast<QBitmap>(d);

            return true;

        } else if (d->type == QVariant::Brush) {

            if (v_cast<QBrush>(d)->style() == Qt::TexturePattern) {

                *static_cast<QPixmap *>(result) = v_cast<QBrush>(d)->texture();

                return true;

            }

        }

        break;

    case QVariant::Image:

        if (d->type == QVariant::Pixmap) {

            *static_cast<QImage *>(result) = v_cast<QPixmap>(d)->toImage();

            return true;

        } else if (d->type == QVariant::Bitmap) {

            *static_cast<QImage *>(result) = v_cast<QBitmap>(d)->toImage();

            return true;

        }

        break;

    case QVariant::Bitmap:

        if (d->type == QVariant::Pixmap) {

            *static_cast<QBitmap *>(result) = *v_cast<QPixmap>(d);

            return true;

        } else if (d->type == QVariant::Image) {

            *static_cast<QBitmap *>(result) = QBitmap::fromImage(*v_cast<QImage>(d));

            return true;

        }

        break;

#ifndef QT_NO_SHORTCUT

    case QVariant::Int:

        if (d->type == QVariant::KeySequence) {

            *static_cast<int *>(result) = (int)(*(v_cast<QKeySequence>(d)));

            return true;

        }

        break;

#endif

    case QVariant::Font:

        if (d->type == QVariant::String) {

            QFont *f = static_cast<QFont *>(result);

            f->fromString(*v_cast<QString>(d));

            return true;

        }

        break;

    case QVariant::Color:

        if (d->type == QVariant::String) {

            static_cast<QColor *>(result)->setNamedColor(*v_cast<QString>(d));

            return static_cast<QColor *>(result)->isValid();

        } else if (d->type == QVariant::ByteArray) {

            static_cast<QColor *>(result)->setNamedColor(QString::fromLatin1(

                                *v_cast<QByteArray>(d)));

            return true;

        } else if (d->type == QVariant::Brush) {

            if (v_cast<QBrush>(d)->style() == Qt::SolidPattern) {

                *static_cast<QColor *>(result) = v_cast<QBrush>(d)->color();

                return true;

            }

        }

        break;

    case QVariant::Brush:

        if (d->type == QVariant::Color) {

            *static_cast<QBrush *>(result) = QBrush(*v_cast<QColor>(d));

            return true;

        } else if (d->type == QVariant::Pixmap) {

            *static_cast<QBrush *>(result) = QBrush(*v_cast<QPixmap>(d));

            return true;