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1599 lines (1536 loc) · 53.2 KB
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/*
*
* Copyright (C) 2010 MeVis Medical Solutions AG All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: MeVis Medical Solutions AG, Universitaetsallee 29,
* 28359 Bremen, Germany or:
*
* http://www.mevis.de
*
*/
//----------------------------------------------------------------------------------
/*!
// \file PythonQtConversion.cpp
// \author Florian Link
// \author Last changed by $Author: florian $
// \date 2006-05
*/
//----------------------------------------------------------------------------------
#include "PythonQtConversion.h"
#include "PythonQtVariants.h"
#include "PythonQtBoolResult.h"
#include <QDateTime>
#include <QTime>
#include <QDate>
#include <climits>
#include <limits>
QHash<int, PythonQtConvertMetaTypeToPythonCB*> PythonQtConv::_metaTypeToPythonConverters;
QHash<int, PythonQtConvertPythonToMetaTypeCB*> PythonQtConv::_pythonToMetaTypeConverters;
PythonQtConvertPythonSequenceToQVariantListCB* PythonQtConv::_pythonSequenceToQVariantListCB = NULL;
PyObject* PythonQtConv::GetPyBool(bool val)
{
PyObject* r = val?Py_True:Py_False;
Py_INCREF(r);
return r;
}
PyObject* PythonQtConv::ConvertQtValueToPython(const PythonQtMethodInfo::ParameterInfo& info, const void* data) {
// is it an enum value?
if (info.enumWrapper) {
if (info.pointerCount==0) {
return PythonQtPrivate::createEnumValueInstance(info.enumWrapper, *((unsigned int*)data));
} else {
// we do not support pointers to enums (who needs them?)
Py_INCREF(Py_None);
return Py_None;
}
}
if (info.typeId == QMetaType::Void) {
Py_INCREF(Py_None);
return Py_None;
} else if ((info.pointerCount == 1) && (info.typeId == QMetaType::Char)) {
// a char ptr will probably be a null terminated string, so we support that:
char* charPtr = *((char**)data);
if (charPtr) {
return PyString_FromString(charPtr);
} else {
Py_INCREF(Py_None);
return Py_None;
}
} else if ((info.typeId == PythonQtMethodInfo::Unknown || info.typeId >= QMetaType::User) &&
info.isQList && (info.innerNamePointerCount == 1)) {
// it is a QList<Obj*> template:
QList<void*>* listPtr = NULL;
if (info.pointerCount == 1) {
listPtr = *((QList<void*>**)data);
} else if (info.pointerCount == 0) {
listPtr = (QList<void*>*)data;
}
if (listPtr) {
return ConvertQListOfPointerTypeToPythonList(listPtr, info);
} else {
return NULL;
}
}
if (info.typeId >= QMetaType::User || info.typeId == QMetaType::QByteArrayList) {
// if a converter is registered, we use is:
PythonQtConvertMetaTypeToPythonCB* converter = _metaTypeToPythonConverters.value(info.typeId);
if (converter) {
return (*converter)(info.pointerCount==0?data:*((void**)data), info.typeId);
}
}
// special handling did not match, so we convert the usual way (either pointer or value version):
if (info.pointerCount == 1) {
// convert the pointer to a Python Object (we can handle ANY C++ object, in the worst case we just know the type and the pointer)
return PythonQt::priv()->wrapPtr(*((void**)data), info.name);
} else if (info.pointerCount == 0) {
if (info.isReference && !info.isConst) {
// if we have a non-const reference, we want to pass the direct pointer to Python.
// NOTE: The moc does not generate non-const & as return values, but we get these when
// we pass virtual methods to Python.
return PythonQt::priv()->wrapPtr((void*)data, info.name);
} else {
// if we have a by value or const&, we copy the object and wrap it:
if (info.typeId != PythonQtMethodInfo::Unknown) {
// handle values that are const& or by value and have a metatype
return convertQtValueToPythonInternal(info.typeId, data);
} else {
// the type does not have a typeid, we need to make a copy using the copy constructor
PythonQtClassInfo* classInfo = PythonQt::priv()->getClassInfo(info.name);
if (classInfo) {
PyObject* result = classInfo->copyObject((void*)data);
if (result) {
return result;
}
}
}
}
}
Py_INCREF(Py_None);
return Py_None;
}
PyObject* PythonQtConv::convertQtValueToPythonInternal(int type, const void* data) {
switch (type) {
case QMetaType::Void:
Py_INCREF(Py_None);
return Py_None;
case QMetaType::Char:
return PyInt_FromLong(*((char*)data));
case QMetaType::UChar:
return PyInt_FromLong(*((unsigned char*)data));
case QMetaType::Short:
return PyInt_FromLong(*((short*)data));
case QMetaType::UShort:
return PyInt_FromLong(*((unsigned short*)data));
case QMetaType::Long:
return PyInt_FromLong(*((long*)data));
case QMetaType::ULong:
// does not fit into simple int of python
return PyLong_FromUnsignedLong(*((unsigned long*)data));
case QMetaType::Bool:
return PythonQtConv::GetPyBool(*((bool*)data));
case QMetaType::Int:
return PyInt_FromLong(*((int*)data));
case QMetaType::UInt:
// does not fit into simple int of python
return PyLong_FromUnsignedLong(*((unsigned int*)data));
case QMetaType::QChar:
return PyInt_FromLong(*((unsigned short*)data));
case QMetaType::Float:
return PyFloat_FromDouble(*((float*)data));
case QMetaType::Double:
return PyFloat_FromDouble(*((double*)data));
case QMetaType::LongLong:
return PyLong_FromLongLong(*((qint64*)data));
case QMetaType::ULongLong:
return PyLong_FromUnsignedLongLong(*((quint64*)data));
// implicit conversion from QByteArray to str has been removed:
//case QMetaType::QByteArray: {
// QByteArray* v = (QByteArray*) data;
// return PyBytes_FromStringAndSize(*v, v->size());
// }
case QMetaType::QVariantHash:
return PythonQtConv::QVariantHashToPyObject(*((QVariantHash*)data));
case QMetaType::QVariantMap:
return PythonQtConv::QVariantMapToPyObject(*((QVariantMap*)data));
case QMetaType::QVariantList:
return PythonQtConv::QVariantListToPyObject(*((QVariantList*)data));
case QMetaType::QString:
return PythonQtConv::QStringToPyObject(*((QString*)data));
case QMetaType::QStringList:
return PythonQtConv::QStringListToPyObject(*((QStringList*)data));
case PythonQtMethodInfo::Variant:
#if QT_VERSION >= 0x040800
case QMetaType::QVariant:
#endif
return PythonQtConv::QVariantToPyObject(*((QVariant*)data));
case QMetaType::QObjectStar:
#if( QT_VERSION < QT_VERSION_CHECK(5,0,0) )
case QMetaType::QWidgetStar:
#endif
return PythonQt::priv()->wrapQObject(*((QObject**)data));
default:
if (PythonQt::priv()->isPythonQtAnyObjectPtrMetaId(type)) {
// special case, it is a PythonQtObjectPtr or PythonQtSafeObjectPtr which contains a PyObject, take it directly:
// in case of PythonQtSafeObjectPtr, the cast is wrong but the ptr layout is identical, so that is ok.
PyObject* o = ((PythonQtObjectPtr*)data)->object();
Py_INCREF(o);
return o;
} else {
if (type > 0) {
return createCopyFromMetaType(type, data);
} else {
std::cerr << "Unknown type that can not be converted to Python: " << type << ", in " << __FILE__ << ":" << __LINE__ << std::endl;
}
}
}
Py_INCREF(Py_None);
return Py_None;
}
void* PythonQtConv::CreateQtReturnValue(const PythonQtMethodInfo::ParameterInfo& info, PythonQtArgumentFrame* frame) {
void* ptr = NULL;
if (info.pointerCount>1) {
return NULL;
} else if (info.pointerCount==1) {
PythonQtArgumentFrame_ADD_VALUE(frame, void*, NULL, ptr);
} else if (info.enumWrapper) {
// create enum return value
PythonQtArgumentFrame_ADD_VALUE(frame, long, 0, ptr);
} else {
switch (info.typeId) {
case QMetaType::Char:
case QMetaType::UChar:
case QMetaType::Short:
case QMetaType::UShort:
case QMetaType::Long:
case QMetaType::ULong:
case QMetaType::Bool:
case QMetaType::Int:
case QMetaType::UInt:
case QMetaType::QChar:
case QMetaType::Float:
case QMetaType::Double:
case QMetaType::LongLong:
case QMetaType::ULongLong:
PythonQtArgumentFrame_ADD_VALUE(frame, qint64, 0, ptr);
break;
case PythonQtMethodInfo::Variant:
PythonQtArgumentFrame_ADD_VARIANT_VALUE(frame, 0, ptr);
// return the ptr to the variant
break;
default:
// check if we have a QList of pointers, which we can circumvent with a QList<void*>
if (info.isQList && (info.innerNamePointerCount == 1)) {
static int id = QMetaType::type("QList<void*>");
PythonQtArgumentFrame_ADD_VARIANT_VALUE(frame, QVariant::Type(id), ptr);
// return the constData pointer that will be filled with the result value later on
ptr = (void*)((QVariant*)ptr)->constData();
}
if (!ptr && info.typeId != PythonQtMethodInfo::Unknown) {
// everything else is stored in a QVariant, if we know the meta type...
PythonQtArgumentFrame_ADD_VARIANT_VALUE(frame, QVariant::Type(info.typeId), ptr);
// return the constData pointer that will be filled with the result value later on
ptr = (void*)((QVariant*)ptr)->constData();
}
}
}
return ptr;
}
void* PythonQtConv::castWrapperTo(PythonQtInstanceWrapper* wrapper, const QByteArray& className, bool& ok)
{
void* object;
if (wrapper->classInfo()->isCPPWrapper()) {
object = wrapper->_wrappedPtr;
} else {
QObject* tmp = wrapper->_obj;
object = tmp;
}
if (object) {
// if we can be upcasted to the given name, we pass the casted pointer in:
object = wrapper->classInfo()->castTo(object, className);
ok = object!=NULL;
} else {
// if it is a NULL ptr, we need to check if it inherits, so that we might pass the NULL ptr
ok = wrapper->classInfo()->inherits(className);
}
return object;
}
void* PythonQtConv::handlePythonToQtAutoConversion(int typeId, PyObject* obj, void* alreadyAllocatedCPPObject, PythonQtArgumentFrame* frame)
{
void* ptr = alreadyAllocatedCPPObject;
static int penId = QMetaType::type("QPen");
static int brushId = QMetaType::type("QBrush");
static int cursorId = QMetaType::type("QCursor");
static int colorId = QMetaType::type("QColor");
static PyObject* qtGlobalColorEnum = PythonQtClassInfo::findEnumWrapper("Qt::GlobalColor", NULL);
if (typeId == cursorId) {
static PyObject* qtCursorShapeEnum = PythonQtClassInfo::findEnumWrapper("Qt::CursorShape", NULL);
if ((PyObject*)obj->ob_type == qtCursorShapeEnum) {
Qt::CursorShape val = (Qt::CursorShape)PyInt_AsLong(obj);
if (!ptr) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE(frame, QCursor(), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
}
*((QCursor*)ptr) = QCursor(val);
return ptr;
}
} else if (typeId == penId) {
// brushes can be created from QColor and from Qt::GlobalColor (and from brushes, but that's the default)
static PyObject* qtColorClass = PythonQt::priv()->getClassInfo("QColor")->pythonQtClassWrapper();
if ((PyObject*)obj->ob_type == qtGlobalColorEnum) {
Qt::GlobalColor val = (Qt::GlobalColor)PyInt_AsLong(obj);
if (!ptr) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE(frame, QPen(), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
}
*((QPen*)ptr) = QPen(QColor(val));
return ptr;
} else if ((PyObject*)obj->ob_type == qtColorClass) {
if (!ptr) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE(frame, QPen(), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
}
*((QPen*)ptr) = QPen(*((QColor*)((PythonQtInstanceWrapper*)obj)->_wrappedPtr));
return ptr;
}
} else if (typeId == brushId) {
// brushes can be created from QColor and from Qt::GlobalColor (and from brushes, but that's the default)
static PyObject* qtColorClass = PythonQt::priv()->getClassInfo("QColor")->pythonQtClassWrapper();
if ((PyObject*)obj->ob_type == qtGlobalColorEnum) {
Qt::GlobalColor val = (Qt::GlobalColor)PyInt_AsLong(obj);
if (!ptr) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE(frame, QBrush(), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
}
*((QBrush*)ptr) = QBrush(QColor(val));
return ptr;
} else if ((PyObject*)obj->ob_type == qtColorClass) {
if (!ptr) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE(frame, QBrush(), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
}
*((QBrush*)ptr) = QBrush(*((QColor*)((PythonQtInstanceWrapper*)obj)->_wrappedPtr));
return ptr;
}
} else if (typeId == colorId) {
// colors can be created from Qt::GlobalColor (and from colors, but that's the default)
if ((PyObject*)obj->ob_type == qtGlobalColorEnum) {
Qt::GlobalColor val = (Qt::GlobalColor)PyInt_AsLong(obj);
if (!ptr) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE(frame, QColor(), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
}
*((QColor*)ptr) = QColor(val);
return ptr;
}
}
return NULL;
}
void* PythonQtConv::ConvertPythonToQt(const PythonQtMethodInfo::ParameterInfo& info, PyObject* obj, bool strict, PythonQtClassInfo* /*classInfo*/, void* alreadyAllocatedCPPObject, PythonQtArgumentFrame* frame)
{
bool ok = false;
void* ptr = NULL;
// autoconversion of QPen/QBrush/QCursor/QColor from different type
if (info.pointerCount==0 && !strict) {
ptr = handlePythonToQtAutoConversion(info.typeId, obj, alreadyAllocatedCPPObject, frame);
if (ptr) {
return ptr;
}
}
if (info.pointerCount==1 && PythonQtBoolResult_Check(obj) && info.typeId == QMetaType::Bool) {
PythonQtBoolResultObject* boolResul = (PythonQtBoolResultObject*)obj;
// store the wrapped pointer in an extra pointer and let ptr point to the extra pointer
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject,frame, void*, &boolResul->_value, ptr);
return ptr;
}
if (PyObject_TypeCheck(obj, &PythonQtInstanceWrapper_Type) &&
info.typeId != PythonQtMethodInfo::Variant &&
!PythonQt::priv()->isPythonQtAnyObjectPtrMetaId(info.typeId)) {
// if we have a Qt wrapper object and if we do not need a QVariant, we do the following:
// (the Variant case is handled below in a switch)
// a C++ wrapper (can be passed as pointer or reference)
PythonQtInstanceWrapper* wrap = (PythonQtInstanceWrapper*)obj;
void* object = castWrapperTo(wrap, info.name, ok);
if (ok) {
if (info.passOwnershipToCPP) {
// Example: QLayout::addWidget(QWidget*)
wrap->passOwnershipToCPP();
} else if (info.passOwnershipToPython) {
// Example: QLayout::removeWidget(QWidget*)
wrap->passOwnershipToPython();
}
if (info.pointerCount==1) {
// store the wrapped pointer in an extra pointer and let ptr point to the extra pointer
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject,frame, void*, object, ptr);
} else if (info.pointerCount==0) {
// store the wrapped pointer directly, since we are a reference
ptr = object;
}
} else {
// not matching, maybe a PyObject*?
if (info.name == "PyObject" && info.pointerCount==1) {
// handle low level PyObject directly
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, void*, obj, ptr);
}
}
} else if (info.pointerCount == 1) {
// a pointer
if (info.typeId == QMetaType::Char || info.typeId == QMetaType::UChar)
{
if (obj->ob_type == &PyBytes_Type) {
// take direct reference to string data
const char* data = PyBytes_AS_STRING(obj);
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, void*, (void*)data, ptr);
} else {
// convert to string
QString str = PyObjGetString(obj, strict, ok);
if (ok) {
QByteArray bytes;
bytes = str.toUtf8();
if (ok) {
void* ptr2 = NULL;
PythonQtArgumentFrame_ADD_VARIANT_VALUE_IF_NEEDED(NULL,frame, QVariant(bytes), ptr2);
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject,frame, void*, (((QByteArray*)((QVariant*)ptr2)->constData())->data()), ptr);
}
}
}
} else if (info.typeId == QMetaType::QString) {
// TODO: this is a special case for bad Qt APIs which take a QString*, like QtGui.QFileDialog.getSaveFileName
// In general we would need to decide to either support * args for all basic types (ignoring the fact that the
// result value is not useable in Python), or if all these APIs need to be wrapped manually/differently, like PyQt/PySide do.
QString str = PyObjGetString(obj, strict, ok);
if (ok) {
void* ptr2 = NULL;
PythonQtArgumentFrame_ADD_VARIANT_VALUE_IF_NEEDED(NULL,frame, QVariant(str), ptr2);
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject,frame, void*, (void*)((QVariant*)ptr2)->constData(), ptr);
}
} else if (info.name == "PyObject") {
// handle low level PyObject directly
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, void*, obj, ptr);
} else if (obj == Py_None) {
// None is treated as a NULL ptr
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, void*, NULL, ptr);
} else {
void* foreignWrapper = PythonQt::priv()->unwrapForeignWrapper(info.name, obj);
if (foreignWrapper) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, void*, foreignWrapper, ptr);
} else {
// if we are not strict, we try if we are passed a 0 integer
if (!strict) {
bool ok;
int value = PyObjGetInt(obj, true, ok);
if (ok && value==0) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, void*, NULL, ptr);
}
}
}
}
} else if (info.pointerCount == 0) {
// not a pointer
switch (info.typeId) {
case QMetaType::Char:
{
int val = PyObjGetInt(obj, strict, ok);
if (ok && (val >= CHAR_MIN && val <= CHAR_MAX)) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, char, val, ptr);
}
}
break;
case QMetaType::UChar:
{
int val = PyObjGetInt(obj, strict, ok);
if (ok && (val >= 0 && val <= UCHAR_MAX)) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, unsigned char, val, ptr);
}
}
break;
case QMetaType::Short:
{
int val = PyObjGetInt(obj, strict, ok);
if (ok && (val >= SHRT_MIN && val <= SHRT_MAX)) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, short, val, ptr);
}
}
break;
case QMetaType::UShort:
{
int val = PyObjGetInt(obj, strict, ok);
if (ok && (val >= 0 && val <= USHRT_MAX)) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, unsigned short, val, ptr);
}
}
break;
case QMetaType::Long:
{
qint64 val = PyObjGetLongLong(obj, strict, ok);
if (ok && (val >= LONG_MIN && val <= LONG_MAX)) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, long, val, ptr);
}
}
break;
case QMetaType::ULong:
{
qint64 val = (unsigned long)PyObjGetLongLong(obj, strict, ok);
if (ok && (val >= 0 && val <= ULONG_MAX)) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, unsigned long, val, ptr);
}
}
break;
case QMetaType::Bool:
{
bool val = PyObjGetBool(obj, strict, ok);
if (ok) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, bool, val, ptr);
}
}
break;
case QMetaType::Int:
{
qint64 val = PyObjGetLongLong(obj, strict, ok);
if (ok && (val >= INT_MIN && val <= INT_MAX)) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, int, val, ptr);
}
}
break;
case QMetaType::UInt:
{
quint64 val = PyObjGetLongLong(obj, strict, ok);
if (ok && (val >= 0 && val <= UINT_MAX)) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, unsigned int, val, ptr);
}
}
break;
case QMetaType::QChar:
{
int val = PyObjGetInt(obj, strict, ok);
if (ok && (val >= 0 && val <= USHRT_MAX)) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, unsigned short, val, ptr);
}
}
break;
case QMetaType::Float:
{
float val = (float)PyObjGetDouble(obj, strict, ok);
if (ok) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, float, val, ptr);
}
}
break;
case QMetaType::Double:
{
double val = PyObjGetDouble(obj, strict, ok);
if (ok) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, double, val, ptr);
}
}
break;
case QMetaType::LongLong:
{
qint64 val = PyObjGetLongLong(obj, strict, ok);
if (ok) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, qint64, val, ptr);
}
}
break;
case QMetaType::ULongLong:
{
quint64 val = PyObjGetULongLong(obj, strict, ok);
if (ok) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, quint64, val, ptr);
}
}
break;
case QMetaType::QByteArray:
{
QByteArray bytes = PyObjGetBytes(obj, strict, ok);
if (!ok && !strict) {
// since Qt uses QByteArray in many places for identifier strings,
// we need to allow implicit conversion from unicode as well.
// We allow that for both Python 2.x and 3.x to be compatible.
bytes = PyObjGetString(obj, true, ok).toUtf8();
}
if (ok) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE_IF_NEEDED(alreadyAllocatedCPPObject,frame, QVariant(bytes), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
}
}
break;
case QMetaType::QString:
{
QString str = PyObjGetString(obj, strict, ok);
if (ok) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, QVariant(str), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
}
}
break;
case QMetaType::QStringList:
{
QStringList l = PyObjToStringList(obj, strict, ok);
if (ok) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE_IF_NEEDED(alreadyAllocatedCPPObject,frame, QVariant(l), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
}
}
break;
case PythonQtMethodInfo::Variant:
{
QVariant v = PyObjToQVariant(obj);
// the only case where conversion can fail it None and we want to pass that to, e.g. setProperty(),
// so we do not check v.isValid() here
PythonQtArgumentFrame_ADD_VARIANT_VALUE_IF_NEEDED(alreadyAllocatedCPPObject,frame, v, ptr);
}
break;
default:
{
// check for enum case
if (info.enumWrapper) {
unsigned int val;
ok = false;
if ((PyObject*)obj->ob_type == info.enumWrapper) {
// we have a exact enum type match:
val = PyInt_AS_LONG(obj);
ok = true;
} else if (!strict) {
// we try to get any integer, when not being strict. If we are strict, integers are not wanted because
// we want an integer overload to be taken first!
val = (unsigned int)PyObjGetLongLong(obj, false, ok);
}
if (ok) {
PythonQtArgumentFrame_ADD_VALUE_IF_NEEDED(alreadyAllocatedCPPObject,frame, unsigned int, val, ptr);
return ptr;
} else {
return NULL;
}
}
if (info.typeId == PythonQtMethodInfo::Unknown || info.typeId >= QMetaType::User) {
// check for QList<AnyPtr*> case, where we will use a QList<void*> QVariant
if (info.isQList && (info.innerNamePointerCount == 1)) {
static int id = QMetaType::type("QList<void*>");
if (!alreadyAllocatedCPPObject) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE_IF_NEEDED(alreadyAllocatedCPPObject, frame, QVariant::Type(id), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
} else {
ptr = alreadyAllocatedCPPObject;
}
ok = ConvertPythonListToQListOfPointerType(obj, (QList<void*>*)ptr, info, strict);
if (ok) {
return ptr;
} else {
return NULL;
}
}
}
// We only do this for registered type > QMetaType::User for performance reasons.
if (info.typeId >= QMetaType::User || info.typeId == QMetaType::QByteArrayList) {
// Maybe we have a special converter that is registered for that type:
PythonQtConvertPythonToMetaTypeCB* converter = _pythonToMetaTypeConverters.value(info.typeId);
if (converter) {
if (!alreadyAllocatedCPPObject) {
// create a new empty variant of concrete type:
PythonQtArgumentFrame_ADD_VARIANT_VALUE_IF_NEEDED(alreadyAllocatedCPPObject,frame, QVariant::Type(info.typeId), ptr);
ptr = (void*)((QVariant*)ptr)->constData();
} else {
ptr = alreadyAllocatedCPPObject;
}
// now call the converter, passing the internal object of the variant
ok = (*converter)(obj, ptr, info.typeId, strict);
if (ok) {
return ptr;
} else {
return NULL;
}
}
}
// if no type id is available, conversion to a QVariant makes no sense/is not possible
if (info.typeId != PythonQtMethodInfo::Unknown) {
// for all other types, we use the same qvariant conversion and pass out the constData of the variant:
QVariant v = PyObjToQVariant(obj, info.typeId);
if (v.isValid()) {
PythonQtArgumentFrame_ADD_VARIANT_VALUE_IF_NEEDED(alreadyAllocatedCPPObject,frame, v, ptr);
ptr = (void*)((QVariant*)ptr)->constData();
}
}
}
}
}
return ptr;
}
QStringList PythonQtConv::PyObjToStringList(PyObject* val, bool strict, bool& ok) {
QStringList v;
ok = false;
// if we are strict, we do not want to convert a string to a stringlist
// (strings in python are detected to be sequences)
if (strict &&
(val->ob_type == &PyBytes_Type ||
PyUnicode_Check(val))) {
return v;
}
if (PySequence_Check(val)) {
int count = PySequence_Size(val);
if (count >= 0) {
for (int i = 0;i<count;i++) {
PyObject* value = PySequence_GetItem(val,i);
v.append(PyObjGetString(value,false,ok));
Py_XDECREF(value);
}
ok = true;
}
}
return v;
}
QString PythonQtConv::PyObjGetRepresentation(PyObject* val)
{
QString r;
PyObject* str = PyObject_Repr(val);
if (str) {
#ifdef PY3K
r = PyObjGetString(str);
#else
r = QString(PyString_AS_STRING(str));
#endif
Py_DECREF(str);
}
return r;
}
QString PythonQtConv::PyObjGetString(PyObject* val, bool strict, bool& ok) {
QString r;
ok = true;
#ifndef PY3K
// in Python 3, we don't want to convert to QString, since we don't know anything about the encoding
// in Python 2, we assume the default for str is latin-1
if (val->ob_type == &PyBytes_Type) {
r = QString::fromLatin1(PyBytes_AS_STRING(val));
} else
#endif
if (PyUnicode_Check(val)) {
#ifdef PY3K
r = QString::fromUtf8(PyUnicode_AsUTF8(val));
#else
PyObject *ptmp = PyUnicode_AsUTF8String(val);
if(ptmp) {
r = QString::fromUtf8(PyString_AS_STRING(ptmp));
Py_DECREF(ptmp);
}
#endif
} else if (!strict) {
PyObject* str = PyObject_Str(val);
if (str) {
#ifdef PY3K
r = QString::fromUtf8(PyUnicode_AsUTF8(str));
#else
r = QString(PyString_AS_STRING(str));
#endif
Py_DECREF(str);
} else {
ok = false;
}
} else {
ok = false;
}
return r;
}
QByteArray PythonQtConv::PyObjGetBytes(PyObject* val, bool /*strict*/, bool& ok) {
// TODO: support buffer objects in general
QByteArray r;
ok = true;
if (PyBytes_Check(val)) {
r = QByteArray(PyBytes_AS_STRING(val), PyBytes_GET_SIZE(val));
} else {
ok = false;
}
return r;
}
bool PythonQtConv::PyObjGetBool(PyObject* val, bool strict, bool &ok) {
bool d = false;
ok = false;
if (val == Py_False) {
d = false;
ok = true;
} else if (val == Py_True) {
d = true;
ok = true;
} else if (!strict) {
int result = PyObject_IsTrue(val);
d = (result == 1);
// the result is -1 if an error occurred, handle this:
ok = (result != -1);
}
return d;
}
int PythonQtConv::PyObjGetInt(PyObject* val, bool strict, bool &ok) {
int d = 0;
ok = true;
if (val->ob_type == &PyInt_Type) {
d = PyInt_AS_LONG(val);
} else if (!strict) {
if (PyObject_TypeCheck(val, &PyInt_Type)) {
// support for derived int classes, e.g. for our enums
d = PyInt_AS_LONG(val);
} else if (val->ob_type == &PyFloat_Type) {
d = floor(PyFloat_AS_DOUBLE(val));
} else if (val->ob_type == &PyLong_Type) {
// handle error on overflow!
d = PyLong_AsLong(val);
} else if (val == Py_False) {
d = 0;
} else if (val == Py_True) {
d = 1;
} else {
PyErr_Clear();
// PyInt_AsLong will try conversion to an int if the object is not an int:
d = PyInt_AsLong(val);
if (PyErr_Occurred()) {
ok = false;
PyErr_Clear();
}
}
} else {
ok = false;
}
return d;
}
qint64 PythonQtConv::PyObjGetLongLong(PyObject* val, bool strict, bool &ok) {
qint64 d = 0;
ok = true;
#ifndef PY3K
if (val->ob_type == &PyInt_Type) {
d = PyInt_AS_LONG(val);
} else
#endif
if (val->ob_type == &PyLong_Type) {
d = PyLong_AsLongLong(val);
} else if (!strict) {
if (PyObject_TypeCheck(val, &PyInt_Type)) {
// support for derived int classes, e.g. for our enums
d = PyInt_AS_LONG(val);
} else if (val->ob_type == &PyFloat_Type) {
d = floor(PyFloat_AS_DOUBLE(val));
} else if (val == Py_False) {
d = 0;
} else if (val == Py_True) {
d = 1;
} else {
PyErr_Clear();
// PyLong_AsLongLong will try conversion to an int if the object is not an int:
d = PyLong_AsLongLong(val);
if (PyErr_Occurred()) {
ok = false;
PyErr_Clear();
}
}
} else {
ok = false;
}
return d;
}
quint64 PythonQtConv::PyObjGetULongLong(PyObject* val, bool strict, bool &ok) {
quint64 d = 0;
ok = true;
#ifndef PY3K
if (Py_TYPE(val) == &PyInt_Type) {
d = PyInt_AS_LONG(val);
} else
#endif
if (Py_TYPE(val) == &PyLong_Type) {
d = PyLong_AsLongLong(val);
} else if (!strict) {
if (PyObject_TypeCheck(val, &PyInt_Type)) {
// support for derived int classes, e.g. for our enums
d = PyInt_AS_LONG(val);
} else if (val->ob_type == &PyFloat_Type) {
d = floor(PyFloat_AS_DOUBLE(val));
} else if (val == Py_False) {
d = 0;
} else if (val == Py_True) {
d = 1;
} else {
PyErr_Clear();
// PyLong_AsLongLong will try conversion to an int if the object is not an int:
d = PyLong_AsLongLong(val);
if (PyErr_Occurred()) {
PyErr_Clear();
ok = false;
}
}
} else {
ok = false;
}
return d;
}
double PythonQtConv::PyObjGetDouble(PyObject* val, bool strict, bool &ok) {
double d = 0;
ok = true;
if (val->ob_type == &PyFloat_Type) {
d = PyFloat_AS_DOUBLE(val);
} else if (!strict) {
#ifndef PY3K
if (PyObject_TypeCheck(val, &PyInt_Type)) {
d = PyInt_AS_LONG(val);
} else
#endif
if (PyLong_Check(val)) {
d = static_cast<double>(PyLong_AsLongLong(val));
} else if (val == Py_False) {
d = 0;
} else if (val == Py_True) {
d = 1;
} else {
PyErr_Clear();
// PyFloat_AsDouble will try conversion to a double if the object is not a float:
d = PyFloat_AsDouble(val);
if (PyErr_Occurred()) {
PyErr_Clear();
ok = false;
}
}
} else {
ok = false;
}
return d;
}
template <typename Map>
void PythonQtConv::pythonToMapVariant(PyObject* val, QVariant& result)
{
if (PyMapping_Check(val)) {
Map map;
PyObject* items = PyMapping_Items(val);
if (items) {
int count = PyList_Size(items);
PyObject* value;
PyObject* key;
PyObject* tuple;
for (int i = 0;i<count;i++) {
tuple = PyList_GetItem(items,i);
key = PyTuple_GetItem(tuple, 0);
value = PyTuple_GetItem(tuple, 1);
map.insert(PyObjGetString(key), PyObjToQVariant(value,-1));
}
Py_DECREF(items);
result = map;
}
}
}
QVariant PythonQtConv::PyObjToQVariant(PyObject* val, int type)
{
QVariant v;
bool ok = true;
if (type == -1
#if QT_VERSION >= 0x040800
|| type == QMetaType::QVariant
#endif
) {
// no special type requested
if (PyBytes_Check(val)) {
#ifdef PY3K
// In Python 3, it is a ByteArray
type = QVariant::ByteArray;
#else
// In Python 2, we need to use String, since it might be a string
type = QVariant::String;
#endif
} else if (PyUnicode_Check(val)) {
type = QVariant::String;
} else if (val == Py_False || val == Py_True) {
type = QVariant::Bool;
#ifndef PY3K
} else if (PyObject_TypeCheck(val, &PyInt_Type)) {
type = QVariant::Int;
#endif
} else if (PyLong_Check(val)) {
// return int if the value fits into that range,
// otherwise it would not be possible to get an int from Python 3
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