/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDBus module of the Qt Toolkit.
**
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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.
**
** 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
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
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****************************************************************************/
#include "qdbusargument.h"
#include <qatomic.h>
#include <qbytearray.h>
#include <qlist.h>
#include <qmap.h>
#include <qstring.h>
#include <qstringlist.h>
#include <qvariant.h>
#include <qdatetime.h>
#include <qrect.h>
#include <qline.h>
#include "qdbusargument_p.h"
#include "qdbusmetatype_p.h"
#include "qdbusutil_p.h"
QT_BEGIN_NAMESPACE
QDBusArgumentPrivate::~QDBusArgumentPrivate()
{
if (message)
q_dbus_message_unref(message);
}
QByteArray QDBusArgumentPrivate::createSignature(int id)
{
if (!qdbus_loadLibDBus())
return "";
QByteArray signature;
QDBusMarshaller *marshaller = new QDBusMarshaller;
marshaller->ba = &signature;
// run it
void *null = 0;
QVariant v(id, null);
QDBusArgument arg(marshaller);
QDBusMetaType::marshall(arg, v.userType(), v.constData());
arg.d = 0;
// delete it
bool ok = marshaller->ok;
delete marshaller;
if (signature.isEmpty() || !ok || !QDBusUtil::isValidSingleSignature(QString::fromLatin1(signature))) {
qWarning("QDBusMarshaller: type `%s' produces invalid D-BUS signature `%s' "
"(Did you forget to call beginStructure() ?)",
QVariant::typeToName( QVariant::Type(id) ),
signature.isEmpty() ? "<empty>" : signature.constData());
return "";
} else if ((signature.at(0) != DBUS_TYPE_ARRAY && signature.at(0) != DBUS_STRUCT_BEGIN_CHAR) ||
(signature.at(0) == DBUS_TYPE_ARRAY && (signature.at(1) == DBUS_TYPE_BYTE ||
signature.at(1) == DBUS_TYPE_STRING))) {
qWarning("QDBusMarshaller: type `%s' attempts to redefine basic D-BUS type '%s' (%s) "
"(Did you forget to call beginStructure() ?)",
QVariant::typeToName( QVariant::Type(id) ),
signature.constData(),
QVariant::typeToName( QVariant::Type(QDBusMetaType::signatureToType(signature))) );
return "";
}
return signature;
}
bool QDBusArgumentPrivate::checkWrite(QDBusArgumentPrivate *&d)
{
if (!d)
return false;
if (d->direction == Marshalling) {
if (!d->marshaller()->ok)
return false;
if (d->message && d->ref != 1) {
QDBusMarshaller *dd = new QDBusMarshaller;
dd->message = q_dbus_message_copy(d->message);
q_dbus_message_iter_init_append(dd->message, &dd->iterator);
if (!d->ref.deref())
delete d;
d = dd;
}
return true;
}
#ifdef QT_DEBUG
qFatal("QDBusArgument: write from a read-only object");
#else
qWarning("QDBusArgument: write from a read-only object");
#endif
return false;
}
bool QDBusArgumentPrivate::checkRead(QDBusArgumentPrivate *d)
{
if (!d)
return false;
if (d->direction == Demarshalling)
return true;
#ifdef QT_DEBUG
qFatal("QDBusArgument: read from a write-only object");
#else
qWarning("QDBusArgument: read from a write-only object");
#endif
return false;
}
bool QDBusArgumentPrivate::checkReadAndDetach(QDBusArgumentPrivate *&d)
{
if (!checkRead(d))
return false; // don't bother
if (d->ref == 1)
return true; // no need to detach
QDBusDemarshaller *dd = new QDBusDemarshaller;
dd->message = q_dbus_message_ref(d->message);
dd->iterator = static_cast<QDBusDemarshaller*>(d)->iterator;
if (!d->ref.deref())
delete d;
d = dd;
return true;
}
/*!
\class QDBusArgument
\inmodule QtDBus
\since 4.2
\brief The QDBusArgument class is used to marshall and demarshall D-Bus arguments.
The class is used to send arguments over D-Bus to remote
applications and to receive them back. D-Bus offers an extensible
type system, based on a few primitive types and associations of
them. See the \l {qdbustypesystem.html}{QtDBus type system} page
for more information on the type system.
QDBusArgument is the central class in the QtDBus type system,
providing functions to marshall and demarshall the primitive
types. The compound types are then created by association of one
or more of the primitive types in arrays, dictionaries or
structures.
The following example illustrates how a structure containing an
integer and a string can be constructed using the \l
{qdbustypesystem.html}{QtDBus type system}:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 0
The type has to be registered with qDBusRegisterMetaType() before
it can be used with QDBusArgument. Therefore, somewhere in your
program, you should add the following code:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 1
Once registered, a type can be used in outgoing method calls
(placed with QDBusAbstractInterface::call()), signal emissions
from registered objects or in incoming calls from remote
applications.
It is important to note that the \c{operator<<} and \c{operator>>}
streaming functions must always produce the same number of entries
in case of structures, both in reading and in writing (marshalling
and demarshalling), otherwise calls and signals may start to
silently fail.
The following example illustrates this wrong usage
in context of a class that may contain invalid data:
\badcode
// Wrongly marshall the MyTime data into a D-Bus argument
QDBusArgument &operator<<(QDBusArgument &argument, const MyTime &mytime)
{
argument.beginStructure();
if (mytime.isValid)
argument << true << mytime.hour
<< mytime.minute << mytime.second;
else
argument << false;
argument.endStructure();
return argument;
}
\endcode
In this example, both the \c{operator<<} and the \c{operator>>}
functions may produce a different number of reads/writes. This can
confuse the QtDBus type system and should be avoided.
\sa QDBusAbstractInterface, {qdbustypesystem.html}{The QtDBus type
system}, {usingadaptors.html}{Using Adaptors}, qdbus_cast()
*/
/*!
\enum QDBusArgument::ElementType
\since 4.5
This enum describes the type of element held by the argument.
\value BasicType A basic element, which is understood by
QVariant. The following types are considered basic: bool,
byte, short, ushort, int, uint, qint64, quint64, double,
QString, QByteArray, QDBusObjectPath, QDBusSignature
\value VariantType The variant element (QDBusVariant)
\value ArrayType An array element, usually represented by QList<T>
or QVector<T>. Note: QByteArray and associative maps are not
considered arrays, even if the D-Bus protocol transports them as such.
\value StructureType A custom type represented by a structure,
like QDateTime, QPoint, etc.
\value MapType An associative container, like QMap<Key, Value> or
QHash<Key, Value>
\value MapEntryType One entry in an associative container: both
the key and the value form one map-entry type.
\value UnknownType The type is unknown or we have reached the end
of the list.
\sa currentType()
*/
/*!
\fn qdbus_cast(const QDBusArgument &argument)
\relates QDBusArgument
\since 4.2
Attempts to demarshall the contents of \a argument into the type
\c{T}. For example:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 2
Note that it is equivalent to the following:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 3
*/
/*!
Constructs an empty QDBusArgument argument.
An empty QDBusArgument object does not allow either reading or
writing to be performed.
*/
QDBusArgument::QDBusArgument()
{
if (!qdbus_loadLibDBus()) {
d = 0;
return;
}
QDBusMarshaller *dd = new QDBusMarshaller;
d = dd;
// create a new message with any type, we won't sent it anyways
dd->message = q_dbus_message_new(DBUS_MESSAGE_TYPE_METHOD_CALL);
q_dbus_message_iter_init_append(dd->message, &dd->iterator);
}
/*!
Constructs a copy of the \a other QDBusArgument object.
Both objects will therefore contain the same state from this point
forward. QDBusArguments are explicitly shared and, therefore, any
modification to either copy will affect the other one too.
*/
QDBusArgument::QDBusArgument(const QDBusArgument &other)
: d(other.d)
{
if (d)
d->ref.ref();
}
/*!
\internal
*/
QDBusArgument::QDBusArgument(QDBusArgumentPrivate *dd)
: d(dd)
{
}
/*!
Copies the \a other QDBusArgument object into this one.
Both objects will therefore contain the same state from this point
forward. QDBusArguments are explicitly shared and, therefore, any
modification to either copy will affect the other one too.
*/
QDBusArgument &QDBusArgument::operator=(const QDBusArgument &other)
{
qAtomicAssign(d, other.d);
return *this;
}
/*!
Disposes of the resources associated with this QDBusArgument
object.
*/
QDBusArgument::~QDBusArgument()
{
if (d && !d->ref.deref())
delete d;
}
/*!
Appends the primitive value \a arg of type \c{BYTE} to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(uchar arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the primitive value \a arg of type \c{BOOLEAN} to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(bool arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the primitive value \a arg of type \c{INT16} to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(short arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the primitive value \a arg of type \c{UINT16} to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(ushort arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the primitive value \a arg of type \c{INT32} to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(int arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the primitive value \a arg of type \c{UINT32} to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(uint arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the primitive value \a arg of type \c{INT64} to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(qlonglong arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the primitive value \a arg of type \c{UINT64} to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(qulonglong arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the primitive value \a arg of type \c{DOUBLE} (double-precision
floating-point) to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(double arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the primitive value \a arg of type \c{STRING} (Unicode character
string) to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(const QString &arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
\internal
Appends the primitive value \a arg of type \c{OBJECT_PATH} (path to a D-Bus
object) to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(const QDBusObjectPath &arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
\internal
Appends the primitive value \a arg of type \c{SIGNATURE} (D-Bus type
signature) to the D-Bus stream.
*/
QDBusArgument &QDBusArgument::operator<<(const QDBusSignature &arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the primitive value \a arg of type \c{VARIANT} to the D-Bus stream.
A D-Bus variant type can contain any type, including other
variants. It is similar to the Qt QVariant type.
*/
QDBusArgument &QDBusArgument::operator<<(const QDBusVariant &arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the QStringList given by \a arg as \c{ARRAY of STRING}
to the D-Bus stream.
QStringList and QByteArray are the only two non-primitive types
that are supported directly by QDBusArgument because of their
widespread usage in Qt applications.
Other arrays are supported through compound types in QtDBus.
*/
QDBusArgument &QDBusArgument::operator<<(const QStringList &arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\overload
Appends the QByteArray given by \a arg as \c{ARRAY of BYTE}
to the D-Bus stream.
QStringList and QByteArray are the only two non-primitive types
that are supported directly by QDBusArgument because of their
widespread usage in Qt applications.
Other arrays are supported through compound types in QtDBus.
*/
QDBusArgument &QDBusArgument::operator<<(const QByteArray &arg)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->append(arg);
return *this;
}
/*!
\internal
Returns the type signature of the D-Bus type this QDBusArgument
\since 4.5
Appends the variant \a v.
\sa asVariant()
*/
void QDBusArgument::appendVariant(const QVariant &v)
{
if (QDBusArgumentPrivate::checkWrite(d))
d->marshaller()->appendVariantInternal(v);
}
/*!
\internal
Returns the type signature of the D-Bus type this QDBusArgument
object is currently pointing to.
*/
QString QDBusArgument::currentSignature() const
{
if (!d)
return QString();
if (d->direction == QDBusArgumentPrivate::Demarshalling)
return d->demarshaller()->currentSignature();
else
return d->marshaller()->currentSignature();
}
/*!
\since 4.5
Returns the classification of the current element type. If an
error decoding the type occurs or if we're at the end of the
argument, this function returns QDBusArgument::UnknownType.
This function only makes sense when demarshalling arguments. If it
is used while marshalling, it will always return UnknownType.
*/
QDBusArgument::ElementType QDBusArgument::currentType() const
{
if (!d)
return UnknownType;
if (d->direction == QDBusArgumentPrivate::Demarshalling)
return d->demarshaller()->currentType();
return UnknownType;
}
/*!
Extracts one D-BUS primitive argument of type \c{BYTE} from the
D-BUS stream and puts it into \a arg.
*/
const QDBusArgument &QDBusArgument::operator>>(uchar &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toByte();
return *this;
}
/*!
\overload
Extracts one D-Bus primitive argument of type \c{BOOLEAN} from the
D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(bool &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toBool();
return *this;
}
/*!
\overload
Extracts one D-Bus primitive argument of type \c{UINT16} from the
D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(ushort &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toUShort();
return *this;
}
/*!
\overload
Extracts one D-Bus primitive argument of type \c{INT16} from the
D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(short &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toShort();
return *this;
}
/*!
\overload
Extracts one D-Bus primitive argument of type \c{INT32} from the
D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(int &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toInt();
return *this;
}
/*!
\overload
Extracts one D-Bus primitive argument of type \c{UINT32} from the
D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(uint &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toUInt();
return *this;
}
/*!
\overload
Extracts one D-Bus primitive argument of type \c{INT64} from the
D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(qlonglong &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toLongLong();
return *this;
}
/*!
\overload
Extracts one D-Bus primitive argument of type \c{UINT64} from the
D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(qulonglong &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toULongLong();
return *this;
}
/*!
\overload
Extracts one D-Bus primitive argument of type \c{DOUBLE}
(double-precision floating pount) from the D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(double &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toDouble();
return *this;
}
/*!
\overload
Extracts one D-Bus primitive argument of type \c{STRING} (Unicode
character string) from the D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(QString &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toString();
return *this;
}
/*!
\overload
\internal
Extracts one D-Bus primitive argument of type \c{OBJECT_PATH}
(D-Bus path to an object) from the D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(QDBusObjectPath &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toObjectPath();
return *this;
}
/*!
\overload
\internal
Extracts one D-Bus primitive argument of type \c{SIGNATURE} (D-Bus
type signature) from the D-Bus stream.
*/
const QDBusArgument &QDBusArgument::operator>>(QDBusSignature &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toSignature();
return *this;
}
/*!
\overload
Extracts one D-Bus primitive argument of type \c{VARIANT} from the
D-Bus stream.
A D-Bus variant type can contain any type, including other
variants. It is similar to the Qt QVariant type.
In case the variant contains a type not directly supported by
QDBusArgument, the value of the returned QDBusVariant will contain
another QDBusArgument. It is your responsibility to further
demarshall it into another type.
*/
const QDBusArgument &QDBusArgument::operator>>(QDBusVariant &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toVariant();
return *this;
}
/*!
\overload
Extracts an array of strings from the D-Bus stream and return it
as a QStringList.
QStringList and QByteArray are the only two non-primitive types
that are supported directly by QDBusArgument because of their
widespread usage in Qt applications.
Other arrays are supported through compound types in QtDBus.
*/
const QDBusArgument &QDBusArgument::operator>>(QStringList &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toStringList();
return *this;
}
/*!
\overload
Extracts an array of bytes from the D-Bus stream and return it
as a QByteArray.
QStringList and QByteArray are the only two non-primitive types
that are supported directly by QDBusArgument because of their
widespread usage in Qt applications.
Other arrays are supported through compound types in QtDBus.
*/
const QDBusArgument &QDBusArgument::operator>>(QByteArray &arg) const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
arg = d->demarshaller()->toByteArray();
return *this;
}
/*!
Opens a new D-Bus structure suitable for appending new arguments.
This function is used usually in \c{operator<<} streaming
operators, as in the following example:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 4
Structures can contain other structures, so the following code is
also valid:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 5
\sa endStructure(), beginArray(), beginMap()
*/
void QDBusArgument::beginStructure()
{
if (QDBusArgumentPrivate::checkWrite(d))
d = d->marshaller()->beginStructure();
}
/*!
Closes a D-Bus structure opened with beginStructure(). This function must be called
same number of times that beginStructure() is called.
\sa beginStructure(), endArray(), endMap()
*/
void QDBusArgument::endStructure()
{
if (QDBusArgumentPrivate::checkWrite(d))
d = d->marshaller()->endStructure();
}
/*!
Opens a new D-Bus array suitable for appending elements of meta-type \a id.
This function is used usually in \c{operator<<} streaming
operators, as in the following example:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 6
If the type you want to marshall is a QList, QVector or any of the
Qt's \l {Generic Containers} that take one template parameter,
you need not declare an \c{operator<<} function for it, since
QtDBus provides generic templates to do the job of marshalling
the data. The same applies for STL's sequence containers, such
as \c {std::list}, \c {std::vector}, etc.
\sa endArray(), beginStructure(), beginMap()
*/
void QDBusArgument::beginArray(int id)
{
if (QDBusArgumentPrivate::checkWrite(d))
d = d->marshaller()->beginArray(id);
}
/*!
Closes a D-Bus array opened with beginArray(). This function must be called
same number of times that beginArray() is called.
\sa beginArray(), endStructure(), endMap()
*/
void QDBusArgument::endArray()
{
if (QDBusArgumentPrivate::checkWrite(d))
d = d->marshaller()->endArray();
}
/*!
Opens a new D-Bus map suitable for
appending elements. Maps are containers that associate one entry
(the key) to another (the value), such as Qt's QMap or QHash. The
ids of the map's key and value meta types must be passed in \a kid
and \a vid respectively.
This function is used usually in \c{operator<<} streaming
operators, as in the following example:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 7
If the type you want to marshall is a QMap or QHash, you need not
declare an \c{operator<<} function for it, since QtDBus provides
generic templates to do the job of marshalling the data.
\sa endMap(), beginStructure(), beginArray(), beginMapEntry()
*/
void QDBusArgument::beginMap(int kid, int vid)
{
if (QDBusArgumentPrivate::checkWrite(d))
d = d->marshaller()->beginMap(kid, vid);
}
/*!
Closes a D-Bus map opened with beginMap(). This function must be called
same number of times that beginMap() is called.
\sa beginMap(), endStructure(), endArray()
*/
void QDBusArgument::endMap()
{
if (QDBusArgumentPrivate::checkWrite(d))
d = d->marshaller()->endMap();
}
/*!
Opens a D-Bus map entry suitable for
appending the key and value entries. This function is only valid
when a map has been opened with beginMap().
See beginMap() for an example of usage of this function.
\sa endMapEntry(), beginMap()
*/
void QDBusArgument::beginMapEntry()
{
if (QDBusArgumentPrivate::checkWrite(d))
d = d->marshaller()->beginMapEntry();
}
/*!
Closes a D-Bus map entry opened with beginMapEntry(). This function must be called
same number of times that beginMapEntry() is called.
\sa beginMapEntry()
*/
void QDBusArgument::endMapEntry()
{
if (QDBusArgumentPrivate::checkWrite(d))
d = d->marshaller()->endMapEntry();
}
/*!
Opens a D-Bus structure suitable for extracting elements.
This function is used usually in \c{operator>>} streaming
operators, as in the following example:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 8
\sa endStructure(), beginArray(), beginMap()
*/
void QDBusArgument::beginStructure() const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
d = d->demarshaller()->beginStructure();
}
/*!
Closes the D-Bus structure and allow extracting of the next element
after the structure.
\sa beginStructure()
*/
void QDBusArgument::endStructure() const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
d = d->demarshaller()->endStructure();
}
/*!
Recurses into the D-Bus array to allow extraction of
the array elements.
This function is used usually in \c{operator>>} streaming
operators, as in the following example:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 9
If the type you want to demarshall is a QList, QVector or any of the
Qt's \l {Generic Containers} that take one template parameter, you
need not declare an \c{operator>>} function for it, since QtDBus
provides generic templates to do the job of demarshalling the data.
The same applies for STL's sequence containers, such as \c {std::list},
\c {std::vector}, etc.
\sa atEnd(), beginStructure(), beginMap()
*/
void QDBusArgument::beginArray() const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
d = d->demarshaller()->beginArray();
}
/*!
Closes the D-Bus array and allow extracting of the next element
after the array.
\sa beginArray()
*/
void QDBusArgument::endArray() const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
d = d->demarshaller()->endArray();
}
/*!
Recurses into the D-Bus map to allow extraction of
the map's elements.
This function is used usually in \c{operator>>} streaming
operators, as in the following example:
\snippet doc/src/snippets/code/src_qdbus_qdbusargument.cpp 10
If the type you want to demarshall is a QMap or QHash, you need not
declare an \c{operator>>} function for it, since QtDBus provides
generic templates to do the job of demarshalling the data.
\sa endMap(), beginStructure(), beginArray(), beginMapEntry()
*/
void QDBusArgument::beginMap() const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
d = d->demarshaller()->beginMap();
}
/*!
Closes the D-Bus map and allow extracting of the next element
after the map.
\sa beginMap()
*/
void QDBusArgument::endMap() const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
d = d->demarshaller()->endMap();
}
/*!
Recurses into the D-Bus map entry to allow extraction
of the key and value pair.
See beginMap() for an example of how this function is usually used.
\sa endMapEntry(), beginMap()
*/
void QDBusArgument::beginMapEntry() const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
d = d->demarshaller()->beginMapEntry();
}
/*!
Closes the D-Bus map entry and allow extracting of the next element
on the map.
\sa beginMapEntry()
*/
void QDBusArgument::endMapEntry() const
{
if (QDBusArgumentPrivate::checkReadAndDetach(d))
d = d->demarshaller()->endMapEntry();
}
/*!
Returns true if there are no more elements to be extracted from
this QDBusArgument. This function is usually used in QDBusArgument
objects returned from beginMap() and beginArray().
*/
bool QDBusArgument::atEnd() const
{
if (QDBusArgumentPrivate::checkRead(d))
return d->demarshaller()->atEnd();
return true; // at least, stop reading
}
/*!
\since 4.5
Returns the current argument in the form of a QVariant. Basic
types will be decoded and returned in the QVariant, but for
complex types, this function will return a QDBusArgument object in
the QVariant. It is the caller's responsibility to decode the
argument (for example, by calling asVariant() in it).
For example, if the current argument is an INT32, this function
will return a QVariant with an argument of type QVariant::Int. For
an array of INT32, it will return a QVariant containing a
QDBusArgument.
If an error occurs or if there are no more arguments to decode
(i.e., we are at the end of the argument list), this function will
return an invalid QVariant.
\sa atEnd()
*/
QVariant QDBusArgument::asVariant() const
{
if (QDBusArgumentPrivate::checkRead(d))
return d->demarshaller()->toVariantInternal();
return QVariant();
}
QT_END_NAMESPACE
// for optimization purposes, we include the marshallers here
#include "qdbusmarshaller.cpp"
#include "qdbusdemarshaller.cpp"
QT_BEGIN_NAMESPACE
// QDBusArgument operators
const QDBusArgument &operator>>(const QDBusArgument &a, QVariant &v)
{
QDBusVariant dbv;
a >> dbv;
v = dbv.variant();
return a;
}
// QVariant types
#ifndef QDBUS_NO_SPECIALTYPES
const QDBusArgument &operator>>(const QDBusArgument &a, QDate &date)
{
int y, m, d;
a.beginStructure();
a >> y >> m >> d;
a.endStructure();
if (y != 0 && m != 0 && d != 0)
date.setYMD(y, m, d);
else
date = QDate();
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QDate &date)
{
a.beginStructure();
if (date.isValid())
a << date.year() << date.month() << date.day();
else
a << 0 << 0 << 0;
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, QTime &time)
{
int h, m, s, ms;
a.beginStructure();
a >> h >> m >> s >> ms;
a.endStructure();
if (h < 0)
time = QTime();
else
time.setHMS(h, m, s, ms);
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QTime &time)
{
a.beginStructure();
if (time.isValid())
a << time.hour() << time.minute() << time.second() << time.msec();
else
a << -1 << -1 << -1 << -1;
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, QDateTime &dt)
{
QDate date;
QTime time;
int timespec;
a.beginStructure();
a >> date >> time >> timespec;
a.endStructure();
dt = QDateTime(date, time, Qt::TimeSpec(timespec));
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QDateTime &dt)
{
a.beginStructure();
a << dt.date() << dt.time() << int(dt.timeSpec());
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, QRect &rect)
{
int x, y, width, height;
a.beginStructure();
a >> x >> y >> width >> height;
a.endStructure();
rect.setRect(x, y, width, height);
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QRect &rect)
{
a.beginStructure();
a << rect.x() << rect.y() << rect.width() << rect.height();
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, QRectF &rect)
{
double x, y, width, height;
a.beginStructure();
a >> x >> y >> width >> height;
a.endStructure();
rect.setRect(qreal(x), qreal(y), qreal(width), qreal(height));
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QRectF &rect)
{
a.beginStructure();
a << double(rect.x()) << double(rect.y()) << double(rect.width()) << double(rect.height());
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, QSize &size)
{
a.beginStructure();
a >> size.rwidth() >> size.rheight();
a.endStructure();
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QSize &size)
{
a.beginStructure();
a << size.width() << size.height();
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, QSizeF &size)
{
double width, height;
a.beginStructure();
a >> width >> height;
a.endStructure();
size.setWidth(qreal(width));
size.setHeight(qreal(height));
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QSizeF &size)
{
a.beginStructure();
a << double(size.width()) << double(size.height());
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, QPoint &pt)
{
a.beginStructure();
a >> pt.rx() >> pt.ry();
a.endStructure();
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QPoint &pt)
{
a.beginStructure();
a << pt.x() << pt.y();
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, QPointF &pt)
{
double x, y;
a.beginStructure();
a >> x >> y;
a.endStructure();
pt.setX(qreal(x));
pt.setY(qreal(y));
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QPointF &pt)
{
a.beginStructure();
a << double(pt.x()) << double(pt.y());
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, QLine &line)
{
QPoint p1, p2;
a.beginStructure();
a >> p1 >> p2;
a.endStructure();
line = QLine(p1, p2);
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QLine &line)
{
a.beginStructure();
a << line.p1() << line.p2();
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, QLineF &line)
{
QPointF p1, p2;
a.beginStructure();
a >> p1 >> p2;
a.endStructure();
line = QLineF(p1, p2);
return a;
}
QDBusArgument &operator<<(QDBusArgument &a, const QLineF &line)
{
a.beginStructure();
a << line.p1() << line.p2();
a.endStructure();
return a;
}
#endif
QT_END_NAMESPACE