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/* qdbuslisthelper_p.h Helper class to convert to and from QVariantList
*
* Copyright (C) 2005 Harald Fernengel <harry@kdevelop.org>
* Copyright (C) 2006 Trolltech AS. All rights reserved.
* Author: Thiago Macieira <thiago.macieira@trolltech.com>
*
* Licensed under the Academic Free License version 2.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
//
// W A R N I N G
// -------------
//
// This file is not part of the public API. This header file may
// change from version to version without notice, or even be
// removed.
//
// We mean it.
//
//
#ifndef QDBUSTYPEHELPERPRIVATE_H
#define QDBUSTYPEHELPERPRIVATE_H
#include <QtCore/qlist.h>
#include <QtCore/qvariant.h>
#include <QtCore/qmetatype.h>
// we're going to support all D-Bus primitive types here:
// uchar -- not needed: QByteArray
// bool
// short
// ushort
// int
// uint
// qlonglong
// qulonglong
// double
// QString -- not needed: QStringList
// QList -- not possible: will use QVariant
// QVariant
// QDBusStruct -- not yet existant
// QMap -- not possible: will use QVariant
inline QDBUS_EXPORT int qDBusMetaTypeId(bool *) { return QVariant::Bool; }
inline QDBUS_EXPORT int qDBusMetaTypeId(uchar *) { return QMetaType::UChar; }
inline QDBUS_EXPORT int qDBusMetaTypeId(short *) { return QMetaType::Short; }
inline QDBUS_EXPORT int qDBusMetaTypeId(ushort *) { return QMetaType::UShort; }
inline QDBUS_EXPORT int qDBusMetaTypeId(int *) { return QVariant::Int; }
inline QDBUS_EXPORT int qDBusMetaTypeId(uint *) { return QVariant::UInt; }
inline QDBUS_EXPORT int qDBusMetaTypeId(qlonglong *) { return QVariant::LongLong; }
inline QDBUS_EXPORT int qDBusMetaTypeId(qulonglong *) { return QVariant::ULongLong; }
inline QDBUS_EXPORT int qDBusMetaTypeId(double *) { return QVariant::Double; }
inline QDBUS_EXPORT int qDBusMetaTypeId(QString *) { return QVariant::String; }
QDBUS_EXPORT int qDBusMetaTypeId(QVariant *);
QDBUS_EXPORT int qDBusMetaTypeId(QList<bool> *);
inline QDBUS_EXPORT int qDBusMetaTypeId(QByteArray *) { return QVariant::ByteArray; }
QDBUS_EXPORT int qDBusMetaTypeId(QList<short> *);
QDBUS_EXPORT int qDBusMetaTypeId(QList<ushort> *);
QDBUS_EXPORT int qDBusMetaTypeId(QList<int> *);
QDBUS_EXPORT int qDBusMetaTypeId(QList<uint> *);
QDBUS_EXPORT int qDBusMetaTypeId(QList<qlonglong> *);
QDBUS_EXPORT int qDBusMetaTypeId(QList<qulonglong> *);
QDBUS_EXPORT int qDBusMetaTypeId(QList<double> *);
inline QDBUS_EXPORT int qDBusMetaTypeId(QStringList *) { return QVariant::StringList; }
inline QDBUS_EXPORT int qDBusMetaTypeId(QVariantList *) { return QVariant::List; }
inline QDBUS_EXPORT int qDBusMetaTypeId(QVariantMap *) { return QVariant::Map; }
// implement the copy mechanism
template<class T>
struct QDBusTypeHelper
{
typedef T Type;
typedef QList<T> List;
static inline int id()
{
Type* t = 0;
return qDBusMetaTypeId(t);
}
static inline int listId()
{
List *l = 0;
return qDBusMetaTypeId(l);
}
static inline QVariant toVariant(const Type &t)
{
return QVariant(id(), &t);
}
static bool canSpecialConvert(const QVariant &);
static Type specialConvert(const QVariant &);
static inline Type fromVariant(const QVariant &v)
{
if (canSpecialConvert(v))
return specialConvert(v);
QVariant copy(v);
if (copy.convert( QVariant::Type(id()) ))
return *reinterpret_cast<const Type *>(copy.constData());
return Type();
}
static inline QVariantList toVariantList(const List &list)
{
QVariantList tmp;
foreach (const Type &t, list)
tmp.append(toVariant(t));
return tmp;
}
static inline QVariantList toVariantList(const QVariant &v)
{
return toVariantList(QDBusTypeHelper<List>::fromVariant(v));
}
static inline List fromVariantList(const QVariantList &list)
{
List tmp;
foreach (const QVariant &v, list)
tmp.append(fromVariant(v));
return tmp;
}
};
template<>
struct QDBusTypeHelper<QVariant>
{
static inline int id()
{
QVariant *t = 0;
return qDBusMetaTypeId(t);
}
static inline int listId()
{
return QVariant::List;
}
static inline QVariant toVariant(const QVariant &t)
{
return QVariant(id(), &t);
}
static inline QVariant fromVariant(const QVariant &v)
{
if (v.userType() == id())
return *reinterpret_cast<const QVariant *>(v.constData());
return v;
}
static inline QVariantList toVariantList(const QVariantList &list)
{
return list;
}
static inline QVariantList fromVariantList(const QVariantList &list)
{
return list;
}
};
#if !defined(QT_NO_CAST_FROM_ASCII) && !defined(QT_NO_CAST_TO_ASCII)
template<>
struct QDBusTypeHelper<char *>
{
static inline int id()
{ return QVariant::String; }
static inline QVariant toVariant(const char *t)
{ return QVariant(t); }
static inline QByteArray fromVariant(const QVariant &v)
{ return v.toString().toAscii(); }
};
template<>
struct QDBusTypeHelper<const char *>
{
static inline int id()
{ return QVariant::String; }
static inline QVariant toVariant(const char *t)
{ return QVariant(t); }
static inline QByteArray fromVariant(const QVariant &v)
{ return v.toString().toAscii(); }
};
#endif
// support three exceptions: uchar, short and ushort
// we have to do this as long as QVariant can't convert to/from the integer metatypes
template<> inline bool QDBusTypeHelper<short>::canSpecialConvert(const QVariant &v)
{ return v.userType() < int(QVariant::UserType); }
template<> inline short QDBusTypeHelper<short>::specialConvert(const QVariant &v)
{ return v.toInt(); }
template<> inline bool QDBusTypeHelper<ushort>::canSpecialConvert(const QVariant &v)
{ return v.userType() < int(QVariant::UserType); }
template<> inline ushort QDBusTypeHelper<ushort>::specialConvert(const QVariant &v)
{ return v.toUInt(); }
template<> inline bool QDBusTypeHelper<uchar>::canSpecialConvert(const QVariant &v)
{ return v.userType() < int(QVariant::UserType); }
template<> inline uchar QDBusTypeHelper<uchar>::specialConvert(const QVariant &v)
{ return v.toUInt(); }
template<typename T> inline bool QDBusTypeHelper<T>::canSpecialConvert(const QVariant &)
{ return false; }
template<typename T> inline T QDBusTypeHelper<T>::specialConvert(const QVariant &)
{ return T(); }
#endif
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