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643 lines
19 KiB
643 lines
19 KiB
/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QVARIANT_H
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#define QVARIANT_H
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#include <QtCore/qatomic.h>
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#include <QtCore/qbytearray.h>
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#include <QtCore/qlist.h>
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#include <QtCore/qmetatype.h>
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#include <QtCore/qmap.h>
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#include <QtCore/qhash.h>
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#include <QtCore/qstring.h>
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#ifndef QICON_H
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typedef QIcon QIconSet;
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#endif // QICON_H
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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QT_MODULE(Core)
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class Q3PointArray;
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class QBitArray;
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class QDataStream;
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class QDate;
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class QDateTime;
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class QLine;
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class QLineF;
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class QLocale;
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class QMatrix;
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class QTransform;
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class QStringList;
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class QTime;
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class QPoint;
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class QPointF;
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class QSize;
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class QSizeF;
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class QRect;
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class QRectF;
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#ifndef QT_NO_REGEXP
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class QRegExp;
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#endif
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class QTextFormat;
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class QTextLength;
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class QUrl;
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class QVariant;
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class QVariantComparisonHelper;
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#ifndef QT_NO_MEMBER_TEMPLATES
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template <typename T>
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inline QVariant qVariantFromValue(const T &);
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template <typename T>
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inline void qVariantSetValue(QVariant &, const T &);
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template<typename T>
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inline T qVariantValue(const QVariant &);
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template<typename T>
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inline bool qVariantCanConvert(const QVariant &);
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#endif
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class Q_CORE_EXPORT QVariant
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{
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public:
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enum Type {
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Invalid = 0,
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Bool = 1,
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Int = 2,
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UInt = 3,
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LongLong = 4,
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ULongLong = 5,
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Double = 6,
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Char = 7,
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Map = 8,
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List = 9,
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String = 10,
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StringList = 11,
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ByteArray = 12,
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BitArray = 13,
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Date = 14,
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Time = 15,
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DateTime = 16,
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Url = 17,
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Locale = 18,
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Rect = 19,
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RectF = 20,
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Size = 21,
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SizeF = 22,
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Line = 23,
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LineF = 24,
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Point = 25,
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PointF = 26,
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RegExp = 27,
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Hash = 28,
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LastCoreType = Hash,
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// value 62 is internally reserved
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#ifdef QT3_SUPPORT
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ColorGroup = 63,
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#endif
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Font = 64,
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Pixmap = 65,
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Brush = 66,
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Color = 67,
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Palette = 68,
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Icon = 69,
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Image = 70,
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Polygon = 71,
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Region = 72,
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Bitmap = 73,
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Cursor = 74,
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SizePolicy = 75,
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KeySequence = 76,
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Pen = 77,
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TextLength = 78,
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TextFormat = 79,
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Matrix = 80,
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Transform = 81,
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Matrix4x4 = 82,
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Vector2D = 83,
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Vector3D = 84,
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Vector4D = 85,
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Quaternion = 86,
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LastGuiType = Quaternion,
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UserType = 127,
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#ifdef QT3_SUPPORT
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IconSet = Icon,
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CString = ByteArray,
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PointArray = Polygon,
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#endif
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LastType = 0xffffffff // need this so that gcc >= 3.4 allocates 32 bits for Type
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};
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inline QVariant();
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~QVariant();
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QVariant(Type type);
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QVariant(int typeOrUserType, const void *copy);
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QVariant(int typeOrUserType, const void *copy, uint flags);
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QVariant(const QVariant &other);
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#ifndef QT_NO_DATASTREAM
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QVariant(QDataStream &s);
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#endif
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QVariant(int i);
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QVariant(uint ui);
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QVariant(qlonglong ll);
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QVariant(qulonglong ull);
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QVariant(bool b);
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QVariant(double d);
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QVariant(float f) { d.is_null = false; d.type = QMetaType::Float; d.data.f = f; }
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#ifndef QT_NO_CAST_FROM_ASCII
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QT_ASCII_CAST_WARN_CONSTRUCTOR QVariant(const char *str);
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#endif
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QVariant(const QByteArray &bytearray);
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QVariant(const QBitArray &bitarray);
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QVariant(const QString &string);
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QVariant(const QLatin1String &string);
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QVariant(const QStringList &stringlist);
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QVariant(const QChar &qchar);
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QVariant(const QDate &date);
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QVariant(const QTime &time);
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QVariant(const QDateTime &datetime);
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QVariant(const QList<QVariant> &list);
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QVariant(const QMap<QString,QVariant> &map);
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QVariant(const QHash<QString,QVariant> &hash);
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#ifndef QT_NO_GEOM_VARIANT
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QVariant(const QSize &size);
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QVariant(const QSizeF &size);
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QVariant(const QPoint &pt);
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QVariant(const QPointF &pt);
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QVariant(const QLine &line);
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QVariant(const QLineF &line);
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QVariant(const QRect &rect);
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QVariant(const QRectF &rect);
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#endif
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QVariant(const QUrl &url);
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QVariant(const QLocale &locale);
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#ifndef QT_NO_REGEXP
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QVariant(const QRegExp ®Exp);
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#endif
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QVariant(Qt::GlobalColor color);
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QVariant(const QBitmap &bitmap);
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QVariant(const Q3PointArray &pa);
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QVariant(const QPixmap &pixmap);
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QVariant& operator=(const QVariant &other);
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Type type() const;
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int userType() const;
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const char *typeName() const;
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bool canConvert(Type t) const;
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bool convert(Type t);
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#ifdef QT3_SUPPORT
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inline QT3_SUPPORT bool canCast(Type t) const
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{ return canConvert(t); }
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inline QT3_SUPPORT bool cast(Type t)
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{ return convert(t); }
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#endif
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inline bool isValid() const;
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bool isNull() const;
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void clear();
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void detach();
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inline bool isDetached() const;
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int toInt(bool *ok = 0) const;
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uint toUInt(bool *ok = 0) const;
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qlonglong toLongLong(bool *ok = 0) const;
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qulonglong toULongLong(bool *ok = 0) const;
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bool toBool() const;
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double toDouble(bool *ok = 0) const;
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float toFloat(bool *ok = 0) const;
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qreal toReal(bool *ok = 0) const;
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QByteArray toByteArray() const;
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QBitArray toBitArray() const;
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QString toString() const;
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QStringList toStringList() const;
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QChar toChar() const;
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QDate toDate() const;
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QTime toTime() const;
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QDateTime toDateTime() const;
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QList<QVariant> toList() const;
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QMap<QString, QVariant> toMap() const;
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QHash<QString, QVariant> toHash() const;
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#ifndef QT_NO_GEOM_VARIANT
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QPoint toPoint() const;
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QPointF toPointF() const;
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QRect toRect() const;
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QSize toSize() const;
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QSizeF toSizeF() const;
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QLine toLine() const;
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QLineF toLineF() const;
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QRectF toRectF() const;
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#endif
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QUrl toUrl() const;
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QLocale toLocale() const;
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#ifndef QT_NO_REGEXP
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QRegExp toRegExp() const;
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#endif
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#ifdef QT3_SUPPORT
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inline QT3_SUPPORT int &asInt();
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inline QT3_SUPPORT uint &asUInt();
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inline QT3_SUPPORT qlonglong &asLongLong();
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inline QT3_SUPPORT qulonglong &asULongLong();
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inline QT3_SUPPORT bool &asBool();
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inline QT3_SUPPORT double &asDouble();
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inline QT3_SUPPORT QByteArray &asByteArray();
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inline QT3_SUPPORT QBitArray &asBitArray();
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inline QT3_SUPPORT QString &asString();
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inline QT3_SUPPORT QStringList &asStringList();
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inline QT3_SUPPORT QDate &asDate();
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inline QT3_SUPPORT QTime &asTime();
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inline QT3_SUPPORT QDateTime &asDateTime();
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inline QT3_SUPPORT QList<QVariant> &asList();
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inline QT3_SUPPORT QMap<QString,QVariant> &asMap();
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inline QT3_SUPPORT QPoint &asPoint();
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inline QT3_SUPPORT QRect &asRect();
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inline QT3_SUPPORT QSize &asSize();
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#endif //QT3_SUPPORT
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QFont toFont() const;
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QColor toColor() const;
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QCursor toCursor() const;
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QBitmap toBitmap() const;
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Q3PointArray toPointArray() const;
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QRegion toRegion() const;
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QPixmap toPixmap() const;
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QImage toImage() const;
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QBrush toBrush() const;
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QPalette toPalette() const;
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QColorGroup toColorGroup() const;
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QIconSet toIconSet() const;
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QFont asFont();
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QColor asColor();
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#ifndef QT_NO_DATASTREAM
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void load(QDataStream &ds);
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void save(QDataStream &ds) const;
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#endif
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static const char *typeToName(Type type);
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static Type nameToType(const char *name);
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#ifdef QT3_SUPPORT
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inline QT3_SUPPORT_CONSTRUCTOR QVariant(bool val, int) { create(Bool, &val); }
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inline QT3_SUPPORT const QByteArray toCString() const { return toByteArray(); }
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inline QT3_SUPPORT QByteArray &asCString() { return *reinterpret_cast<QByteArray *>(castOrDetach(ByteArray)); }
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#endif
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void *data();
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const void *constData() const;
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inline const void *data() const { return constData(); }
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#ifndef QT_NO_MEMBER_TEMPLATES
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template<typename T>
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inline void setValue(const T &value);
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template<typename T>
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inline T value() const
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{ return qVariantValue<T>(*this); }
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template<typename T>
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static inline QVariant fromValue(const T &value)
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{ return qVariantFromValue(value); }
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template<typename T>
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bool canConvert() const
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{ return qVariantCanConvert<T>(*this); }
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#endif
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public:
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#ifndef qdoc
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struct PrivateShared
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{
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inline PrivateShared(void *v) : ptr(v), ref(1) { }
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void *ptr;
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QAtomicInt ref;
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};
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struct Private
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{
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inline Private(): type(Invalid), is_shared(false), is_null(true) { data.ptr = 0; }
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inline Private(const Private &other)
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: data(other.data), type(other.type),
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is_shared(other.is_shared), is_null(other.is_null)
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{}
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union Data
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{
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char c;
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int i;
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uint u;
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bool b;
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double d;
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float f;
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qreal real;
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qlonglong ll;
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qulonglong ull;
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QObject *o;
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void *ptr;
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PrivateShared *shared;
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} data;
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uint type : 30;
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uint is_shared : 1;
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uint is_null : 1;
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};
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public:
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typedef void (*f_construct)(Private *, const void *);
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typedef void (*f_clear)(Private *);
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typedef bool (*f_null)(const Private *);
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#ifndef QT_NO_DATASTREAM
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typedef void (*f_load)(Private *, QDataStream &);
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typedef void (*f_save)(const Private *, QDataStream &);
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#endif
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typedef bool (*f_compare)(const Private *, const Private *);
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typedef bool (*f_convert)(const QVariant::Private *d, Type t, void *, bool *);
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typedef bool (*f_canConvert)(const QVariant::Private *d, Type t);
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typedef void (*f_debugStream)(QDebug, const QVariant &);
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struct Handler {
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f_construct construct;
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f_clear clear;
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f_null isNull;
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#ifndef QT_NO_DATASTREAM
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f_load load;
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f_save save;
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#endif
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f_compare compare;
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f_convert convert;
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f_canConvert canConvert;
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f_debugStream debugStream;
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};
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#endif
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inline bool operator==(const QVariant &v) const
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{ return cmp(v); }
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inline bool operator!=(const QVariant &v) const
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{ return !cmp(v); }
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protected:
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friend inline bool qvariant_cast_helper(const QVariant &, QVariant::Type, void *);
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friend int qRegisterGuiVariant();
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friend int qUnregisterGuiVariant();
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friend inline bool operator==(const QVariant &, const QVariantComparisonHelper &);
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#ifndef QT_NO_DEBUG_STREAM
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friend Q_CORE_EXPORT QDebug operator<<(QDebug, const QVariant &);
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#endif
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Private d;
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static const Handler *handler;
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void create(int type, const void *copy);
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#ifdef QT3_SUPPORT
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void *castOrDetach(Type t);
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#endif
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bool cmp(const QVariant &other) const;
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private:
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// force compile error, prevent QVariant(bool) to be called
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inline QVariant(void *) { Q_ASSERT(false); }
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#ifdef QT_NO_CAST_FROM_ASCII
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// force compile error when implicit conversion is not wanted
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inline QVariant(const char *) { Q_ASSERT(false); }
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#endif
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#ifndef QT3_SUPPORT
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// force compile error, prevent QVariant(QVariant::Type, int) to be called
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inline QVariant(bool, int) { Q_ASSERT(false); }
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#endif
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public:
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typedef Private DataPtr;
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inline DataPtr &data_ptr() { return d; }
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};
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typedef QList<QVariant> QVariantList;
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typedef QMap<QString, QVariant> QVariantMap;
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typedef QHash<QString, QVariant> QVariantHash;
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inline bool qvariant_cast_helper(const QVariant &v, QVariant::Type tp, void *ptr)
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{ return QVariant::handler->convert(&v.d, tp, ptr, 0); }
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template <typename T>
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|
inline QVariant qVariantFromValue(const T &t)
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{
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return QVariant(qMetaTypeId<T>(reinterpret_cast<T *>(0)), &t, QTypeInfo<T>::isPointer);
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}
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template <>
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inline QVariant qVariantFromValue(const QVariant &t) { return t; }
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template <typename T>
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inline void qVariantSetValue(QVariant &v, const T &t)
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{
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//if possible we reuse the current QVariant private
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const uint type = qMetaTypeId<T>(reinterpret_cast<T *>(0));
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|
QVariant::Private &d = v.data_ptr();
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if (v.isDetached() && (type == d.type || (type <= uint(QVariant::Char) && d.type <= uint(QVariant::Char)))) {
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d.type = type;
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|
d.is_null = false;
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|
T *old = reinterpret_cast<T*>(d.is_shared ? d.data.shared->ptr : &d.data.ptr);
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|
if (QTypeInfo<T>::isComplex)
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|
old->~T();
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|
new (old) T(t); //call the copy constructor
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|
} else {
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|
v = QVariant(type, &t, QTypeInfo<T>::isPointer);
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}
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}
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|
template <>
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inline void qVariantSetValue<QVariant>(QVariant &v, const QVariant &t)
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{
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v = t;
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}
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|
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inline QVariant::QVariant() {}
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|
inline bool QVariant::isValid() const { return d.type != Invalid; }
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|
|
#ifdef QT3_SUPPORT
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|
inline int &QVariant::asInt()
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|
{ return *reinterpret_cast<int *>(castOrDetach(Int)); }
|
|
inline uint &QVariant::asUInt()
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|
{ return *reinterpret_cast<uint *>(castOrDetach(UInt)); }
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|
inline qlonglong &QVariant::asLongLong()
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|
{ return *reinterpret_cast<qlonglong *>(castOrDetach(LongLong)); }
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|
inline qulonglong &QVariant::asULongLong()
|
|
{ return *reinterpret_cast<qulonglong *>(castOrDetach(ULongLong)); }
|
|
inline bool &QVariant::asBool()
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|
{ return *reinterpret_cast<bool *>(castOrDetach(Bool)); }
|
|
inline double &QVariant::asDouble()
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|
{ return *reinterpret_cast<double *>(castOrDetach(Double)); }
|
|
inline QByteArray& QVariant::asByteArray()
|
|
{ return *reinterpret_cast<QByteArray *>(castOrDetach(ByteArray)); }
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|
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
|
|
|
|
#ifndef QT_NO_DATASTREAM
|
|
Q_CORE_EXPORT QDataStream& operator>> (QDataStream& s, QVariant& p);
|
|
Q_CORE_EXPORT QDataStream& operator<< (QDataStream& s, const QVariant& p);
|
|
Q_CORE_EXPORT QDataStream& operator>> (QDataStream& s, QVariant::Type& p);
|
|
Q_CORE_EXPORT QDataStream& operator<< (QDataStream& s, const QVariant::Type p);
|
|
#endif
|
|
|
|
inline bool QVariant::isDetached() const
|
|
{ return !d.is_shared || d.data.shared->ref == 1; }
|
|
|
|
|
|
#ifdef qdoc
|
|
inline bool operator==(const QVariant &v1, const QVariant &v2);
|
|
inline bool operator!=(const QVariant &v1, const QVariant &v2);
|
|
#else
|
|
|
|
/* Helper class to add one more level of indirection to prevent
|
|
implicit casts.
|
|
*/
|
|
class QVariantComparisonHelper
|
|
{
|
|
public:
|
|
inline QVariantComparisonHelper(const QVariant &var)
|
|
: v(&var) {}
|
|
private:
|
|
friend inline bool operator==(const QVariant &, const QVariantComparisonHelper &);
|
|
const QVariant *v;
|
|
};
|
|
|
|
inline bool operator==(const QVariant &v1, const QVariantComparisonHelper &v2)
|
|
{
|
|
return v1.cmp(*v2.v);
|
|
}
|
|
|
|
inline bool operator!=(const QVariant &v1, const QVariantComparisonHelper &v2)
|
|
{
|
|
return !operator==(v1, v2);
|
|
}
|
|
#endif
|
|
|
|
#ifndef QT_MOC
|
|
template<typename T> inline T qvariant_cast(const QVariant &v)
|
|
{
|
|
const int vid = qMetaTypeId<T>(static_cast<T *>(0));
|
|
if (vid == v.userType())
|
|
return *reinterpret_cast<const T *>(v.constData());
|
|
if (vid < int(QMetaType::User)) {
|
|
T t;
|
|
if (qvariant_cast_helper(v, QVariant::Type(vid), &t))
|
|
return t;
|
|
}
|
|
return T();
|
|
}
|
|
|
|
template<> inline QVariant qvariant_cast<QVariant>(const QVariant &v)
|
|
{
|
|
static const int vid = qRegisterMetaType<QVariant>("QVariant");
|
|
if (vid == v.userType())
|
|
return *reinterpret_cast<const QVariant *>(v.constData());
|
|
return v;
|
|
}
|
|
|
|
template<typename T>
|
|
inline T qVariantValue(const QVariant &variant)
|
|
{ return qvariant_cast<T>(variant); }
|
|
|
|
template<typename T>
|
|
inline bool qVariantCanConvert(const QVariant &variant)
|
|
{
|
|
return variant.canConvert(static_cast<QVariant::Type>(
|
|
qMetaTypeId<T>(static_cast<T *>(0))));
|
|
}
|
|
#endif
|
|
Q_DECLARE_SHARED(QVariant)
|
|
Q_DECLARE_TYPEINFO(QVariant, Q_MOVABLE_TYPE);
|
|
|
|
#ifndef QT_NO_DEBUG_STREAM
|
|
Q_CORE_EXPORT QDebug operator<<(QDebug, const QVariant &);
|
|
Q_CORE_EXPORT QDebug operator<<(QDebug, const QVariant::Type);
|
|
#endif
|
|
|
|
QT_END_NAMESPACE
|
|
|
|
Q_DECLARE_BUILTIN_METATYPE(QVariantList, QVariantList)
|
|
Q_DECLARE_BUILTIN_METATYPE(QVariantMap, QVariantMap)
|
|
Q_DECLARE_BUILTIN_METATYPE(QVariantHash, QVariantHash)
|
|
|
|
QT_END_HEADER
|
|
|
|
#endif // QVARIANT_H
|