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

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

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** 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.

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** 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

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**

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

#ifndef QVARIANT_H

#define QVARIANT_H

#include <QtCore/qatomic.h>

#include <QtCore/qbytearray.h>

#include <QtCore/qlist.h>

#include <QtCore/qmetatype.h>

#include <QtCore/qmap.h>

#include <QtCore/qhash.h>

#include <QtCore/qstring.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Core)

class QBitArray;

class QDataStream;

class QDate;

class QDateTime;

class QLine;

class QLineF;

class QLocale;

class QMatrix;

class QTransform;

class QStringList;

class QTime;

class QPoint;

class QPointF;

class QSize;

class QSizeF;

class QRect;

class QRectF;

#ifndef QT_NO_REGEXP

class QRegExp;

#endif

class QTextFormat;

class QTextLength;

class QUrl;

class QVariant;

class QVariantComparisonHelper;

#ifndef QT_NO_MEMBER_TEMPLATES

template <typename T>

inline QVariant qVariantFromValue(const T &);

template <typename T>

inline void qVariantSetValue(QVariant &, const T &);

template<typename T>

inline T qVariantValue(const QVariant &);

template<typename T>

inline bool qVariantCanConvert(const QVariant &);

#endif

class Q_CORE_EXPORT QVariant

{

 public:

    enum Type {

        Invalid = 0,

        Bool = 1,

        Int = 2,

        UInt = 3,

        LongLong = 4,

        ULongLong = 5,

        Double = 6,

        Char = 7,

        Map = 8,

        List = 9,

        String = 10,

        StringList = 11,

        ByteArray = 12,

        BitArray = 13,

        Date = 14,

        Time = 15,

        DateTime = 16,

        Url = 17,

        Locale = 18,

        Rect = 19,

        RectF = 20,

        Size = 21,

        SizeF = 22,

        Line = 23,

        LineF = 24,

        Point = 25,

        PointF = 26,

	RegExp = 27,

        Hash = 28,

        LastCoreType = Hash,

        // value 62 is internally reserved

#ifdef QT3_SUPPORT

        ColorGroup = 63,

#endif

        Font = 64,

        Pixmap = 65,

        Brush = 66,

        Color = 67,

        Palette = 68,

        Icon = 69,

        Image = 70,

        Polygon = 71,

        Region = 72,

        Bitmap = 73,

        Cursor = 74,

        SizePolicy = 75,

        KeySequence = 76,

        Pen = 77,

        TextLength = 78,

        TextFormat = 79,

        Matrix = 80,

        Transform = 81,

        Matrix4x4 = 82,

        Vector2D = 83,

        Vector3D = 84,

        Vector4D = 85,

        Quaternion = 86,

        LastGuiType = Quaternion,

        UserType = 127,

#ifdef QT3_SUPPORT

        IconSet = Icon,

        CString = ByteArray,

        PointArray = Polygon,

#endif

        LastType = 0xffffffff // need this so that gcc >= 3.4 allocates 32 bits for Type

    };

    inline QVariant();

    ~QVariant();

    QVariant(Type type);

    QVariant(int typeOrUserType, const void *copy);

    QVariant(int typeOrUserType, const void *copy, uint flags);

    QVariant(const QVariant &other);

#ifndef QT_NO_DATASTREAM

    QVariant(QDataStream &s);

#endif

    QVariant(int i);

    QVariant(uint ui);

    QVariant(qlonglong ll);

    QVariant(qulonglong ull);

    QVariant(bool b);

    QVariant(double d);

    QVariant(float f) { d.is_null = false; d.type = QMetaType::Float; d.data.f = f; }

#ifndef QT_NO_CAST_FROM_ASCII

    QT_ASCII_CAST_WARN_CONSTRUCTOR QVariant(const char *str);

#endif

    QVariant(const QByteArray &bytearray);

    QVariant(const QBitArray &bitarray);

    QVariant(const QString &string);

    QVariant(const QLatin1String &string);

    QVariant(const QStringList &stringlist);

    QVariant(const QChar &qchar);

    QVariant(const QDate &date);

    QVariant(const QTime &time);

    QVariant(const QDateTime &datetime);

    QVariant(const QList<QVariant> &list);

    QVariant(const QMap<QString,QVariant> &map);

    QVariant(const QHash<QString,QVariant> &hash);

#ifndef QT_NO_GEOM_VARIANT

    QVariant(const QSize &size);

    QVariant(const QSizeF &size);

    QVariant(const QPoint &pt);

    QVariant(const QPointF &pt);

    QVariant(const QLine &line);

    QVariant(const QLineF &line);

    QVariant(const QRect &rect);

    QVariant(const QRectF &rect);

#endif

    QVariant(const QUrl &url);

    QVariant(const QLocale &locale);

#ifndef QT_NO_REGEXP

    QVariant(const QRegExp &regExp);

#endif

    QVariant(Qt::GlobalColor color);

    QVariant& operator=(const QVariant &other);

    Type type() const;

    int userType() const;

    const char *typeName() const;

    bool canConvert(Type t) const;

    bool convert(Type t);

#ifdef QT3_SUPPORT

    inline QT3_SUPPORT bool canCast(Type t) const

    { return canConvert(t); }

    inline QT3_SUPPORT bool cast(Type t)

    { return convert(t); }

#endif

    inline bool isValid() const;

    bool isNull() const;

    void clear();

    void detach();

    inline bool isDetached() const;

    int toInt(bool *ok = 0) const;

    uint toUInt(bool *ok = 0) const;

    qlonglong toLongLong(bool *ok = 0) const;

    qulonglong toULongLong(bool *ok = 0) const;

    bool toBool() const;

    double toDouble(bool *ok = 0) const;

    float toFloat(bool *ok = 0) const;

    qreal toReal(bool *ok = 0) const;

    QByteArray toByteArray() const;

    QBitArray toBitArray() const;

    QString toString() const;

    QStringList toStringList() const;

    QChar toChar() const;

    QDate toDate() const;

    QTime toTime() const;

    QDateTime toDateTime() const;

    QList<QVariant> toList() const;

    QMap<QString, QVariant> toMap() const;

    QHash<QString, QVariant> toHash() const;

#ifndef QT_NO_GEOM_VARIANT

    QPoint toPoint() const;

    QPointF toPointF() const;

    QRect toRect() const;

    QSize toSize() const;

    QSizeF toSizeF() const;

    QLine toLine() const;

    QLineF toLineF() const;

    QRectF toRectF() const;

#endif

    QUrl toUrl() const;

    QLocale toLocale() const;

#ifndef QT_NO_REGEXP

    QRegExp toRegExp() const;

#endif

#ifdef QT3_SUPPORT

    inline QT3_SUPPORT int &asInt();

    inline QT3_SUPPORT uint &asUInt();

    inline QT3_SUPPORT qlonglong &asLongLong();

    inline QT3_SUPPORT qulonglong &asULongLong();

    inline QT3_SUPPORT bool &asBool();

    inline QT3_SUPPORT double &asDouble();

    inline QT3_SUPPORT QByteArray &asByteArray();

    inline QT3_SUPPORT QBitArray &asBitArray();

    inline QT3_SUPPORT QString &asString();

    inline QT3_SUPPORT QStringList &asStringList();

    inline QT3_SUPPORT QDate &asDate();

    inline QT3_SUPPORT QTime &asTime();

    inline QT3_SUPPORT QDateTime &asDateTime();

    inline QT3_SUPPORT QList<QVariant> &asList();

    inline QT3_SUPPORT QMap<QString,QVariant> &asMap();

    inline QT3_SUPPORT QPoint &asPoint();

    inline QT3_SUPPORT QRect &asRect();

    inline QT3_SUPPORT QSize &asSize();

#endif //QT3_SUPPORT

#ifndef QT_NO_DATASTREAM

    void load(QDataStream &ds);

    void save(QDataStream &ds) const;

#endif

    static const char *typeToName(Type type);

    static Type nameToType(const char *name);

#ifdef QT3_SUPPORT

    inline QT3_SUPPORT_CONSTRUCTOR QVariant(bool val, int) { create(Bool, &val); }

    inline QT3_SUPPORT const QByteArray toCString() const { return toByteArray(); }

    inline QT3_SUPPORT QByteArray &asCString() { return *reinterpret_cast<QByteArray *>(castOrDetach(ByteArray)); }

#endif

    void *data();

    const void *constData() const;

    inline const void *data() const { return constData(); }

#ifndef QT_NO_MEMBER_TEMPLATES

    template<typename T>

    inline void setValue(const T &value);

    template<typename T>

    inline T value() const

    { return qVariantValue<T>(*this); }

    template<typename T>

    static inline QVariant fromValue(const T &value)

    { return qVariantFromValue(value); }

    template<typename T>

    bool canConvert() const

    { return qVariantCanConvert<T>(*this); }

#endif

 public:

#ifndef qdoc

    struct PrivateShared

    {

        inline PrivateShared(void *v) : ptr(v), ref(1) { }

        void *ptr;

        QAtomicInt ref;

    };

    struct Private

    {

        inline Private(): type(Invalid), is_shared(false), is_null(true) { data.ptr = 0; }

        inline Private(const Private &other)

            : data(other.data), type(other.type),

              is_shared(other.is_shared), is_null(other.is_null)

        {}

        union Data

        {

            char c;

            int i;

            uint u;

            bool b;

            double d;

            float f;

            qreal real;

            qlonglong ll;

            qulonglong ull;

            QObject *o;

            void *ptr;

            PrivateShared *shared;

        } data;

        uint type : 30;

        uint is_shared : 1;

        uint is_null : 1;

    };

 public:

    typedef void (*f_construct)(Private *, const void *);

    typedef void (*f_clear)(Private *);

    typedef bool (*f_null)(const Private *);

#ifndef QT_NO_DATASTREAM

    typedef void (*f_load)(Private *, QDataStream &);

    typedef void (*f_save)(const Private *, QDataStream &);

#endif

    typedef bool (*f_compare)(const Private *, const Private *);

    typedef bool (*f_convert)(const QVariant::Private *d, Type t, void *, bool *);

    typedef bool (*f_canConvert)(const QVariant::Private *d, Type t);

    typedef void (*f_debugStream)(QDebug, const QVariant &);

    struct Handler {

        f_construct construct;

        f_clear clear;

        f_null isNull;

#ifndef QT_NO_DATASTREAM

        f_load load;

        f_save save;

#endif

        f_compare compare;

        f_convert convert;

        f_canConvert canConvert;

        f_debugStream debugStream;

    };

#endif

    inline bool operator==(const QVariant &v) const

    { return cmp(v); }

    inline bool operator!=(const QVariant &v) const

    { return !cmp(v); }

protected:

    friend inline bool qvariant_cast_helper(const QVariant &, QVariant::Type, void *);

    friend int qRegisterGuiVariant();

    friend int qUnregisterGuiVariant();

    friend inline bool operator==(const QVariant &, const QVariantComparisonHelper &);

#ifndef QT_NO_DEBUG_STREAM

    friend Q_CORE_EXPORT QDebug operator<<(QDebug, const QVariant &);

#endif

    Private d;

    static const Handler *handler;

    void create(int type, const void *copy);

#ifdef QT3_SUPPORT

    void *castOrDetach(Type t);

#endif

    bool cmp(const QVariant &other) const;

private:

    // force compile error, prevent QVariant(bool) to be called

    inline QVariant(void *) { Q_ASSERT(false); }

#ifdef QT_NO_CAST_FROM_ASCII

    // force compile error when implicit conversion is not wanted

    inline QVariant(const char *) { Q_ASSERT(false); }

#endif

#ifndef QT3_SUPPORT

    // force compile error, prevent QVariant(QVariant::Type, int) to be called

    inline QVariant(bool, int) { Q_ASSERT(false); }

#endif

public:

    typedef Private DataPtr;

    inline DataPtr &data_ptr() { return d; }

};

typedef QList<QVariant> QVariantList;

typedef QMap<QString, QVariant> QVariantMap;

typedef QHash<QString, QVariant> QVariantHash;

inline bool qvariant_cast_helper(const QVariant &v, QVariant::Type tp, void *ptr)

{ return QVariant::handler->convert(&v.d, tp, ptr, 0); }

template <typename T>

inline QVariant qVariantFromValue(const T &t)

{

    return QVariant(qMetaTypeId<T>(reinterpret_cast<T *>(0)), &t, QTypeInfo<T>::isPointer);

}

template <>

inline QVariant qVariantFromValue(const QVariant &t) { return t; }

template <typename T>

inline void qVariantSetValue(QVariant &v, const T &t)

{

    //if possible we reuse the current QVariant private

    const uint type = qMetaTypeId<T>(reinterpret_cast<T *>(0));

    QVariant::Private &d = v.data_ptr();

    if (v.isDetached() && (type == d.type || (type <= uint(QVariant::Char) && d.type <= uint(QVariant::Char)))) {

        d.type = type;

        d.is_null = false;

        T *old = reinterpret_cast<T*>(d.is_shared ? d.data.shared->ptr : &d.data.ptr);

        if (QTypeInfo<T>::isComplex)

            old->~T();

        new (old) T(t); //call the copy constructor

    } else {

        v = QVariant(type, &t, QTypeInfo<T>::isPointer);

    }

}

template <>

inline void qVariantSetValue<QVariant>(QVariant &v, const QVariant &t)

{

    v = t;

}

inline QVariant::QVariant() {}

inline bool QVariant::isValid() const { return d.type != Invalid; }

#ifdef QT3_SUPPORT

inline int &QVariant::asInt()

{ return *reinterpret_cast<int *>(castOrDetach(Int)); }

inline uint &QVariant::asUInt()

{ return *reinterpret_cast<uint *>(castOrDetach(UInt)); }

inline qlonglong &QVariant::asLongLong()

{ return *reinterpret_cast<qlonglong *>(castOrDetach(LongLong)); }

inline qulonglong &QVariant::asULongLong()

{ return *reinterpret_cast<qulonglong *>(castOrDetach(ULongLong)); }

inline bool &QVariant::asBool()

{ return *reinterpret_cast<bool *>(castOrDetach(Bool)); }

inline double &QVariant::asDouble()

{ return *reinterpret_cast<double *>(castOrDetach(Double)); }

inline QByteArray& QVariant::asByteArray()

{ return *reinterpret_cast<QByteArray *>(castOrDetach(ByteArray)); }

inline QBitArray& QVariant::asBitArray()

{ return *reinterpret_cast<QBitArray *>(castOrDetach(BitArray)); }

inline QString& QVariant::asString()

{ return *reinterpret_cast<QString *>(castOrDetach(String)); }

inline QStringList& QVariant::asStringList()

{ return *reinterpret_cast<QStringList *>(castOrDetach(StringList)); }

inline QDate& QVariant::asDate()

{ return *reinterpret_cast<QDate *>(castOrDetach(Date)); }

inline QTime& QVariant::asTime()

{ return *reinterpret_cast<QTime *>(castOrDetach(Time)); }

inline QDateTime& QVariant::asDateTime()

{ return *reinterpret_cast<QDateTime *>(castOrDetach(DateTime)); }

inline QList<QVariant>& QVariant::asList()

{ return *reinterpret_cast<QList<QVariant> *>(castOrDetach(List)); }

inline QMap<QString, QVariant>& QVariant::asMap()

{ return *reinterpret_cast<QMap<QString, QVariant> *>(castOrDetach(Map)); }

inline QPoint &QVariant::asPoint()

{ return *reinterpret_cast<QPoint *>(castOrDetach(Point)); }

inline QRect &QVariant::asRect()

{ return *reinterpret_cast<QRect *>(castOrDetach(Rect)); }

inline QSize &QVariant::asSize()

{ return *reinterpret_cast<QSize *>(castOrDetach(Size)); }

#endif //QT3_SUPPORT

#ifndef QT_NO_MEMBER_TEMPLATES

template<typename T>

inline void QVariant::setValue(const T &avalue)

{ qVariantSetValue(*this, avalue); }

#endif