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Diffstat (limited to 'qt/qdbustypehelper_p.h')
| -rw-r--r-- | qt/qdbustypehelper_p.h | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/qt/qdbustypehelper_p.h b/qt/qdbustypehelper_p.h new file mode 100644 index 00000000..bcb0896a --- /dev/null +++ b/qt/qdbustypehelper_p.h @@ -0,0 +1,231 @@ +/* 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 |