189 lines
8.4 KiB
C++
189 lines
8.4 KiB
C++
/***************************************************************************
|
|
* Copyright (c) 2013 Werner Mayer <wmayer[at]users.sourceforge.net> *
|
|
* *
|
|
* This file is part of the FreeCAD CAx development system. *
|
|
* *
|
|
* This library is free software; you can redistribute it and/or *
|
|
* modify it under the terms of the GNU Library General Public *
|
|
* License as published by the Free Software Foundation; either *
|
|
* version 2 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 Library General Public License for more details. *
|
|
* *
|
|
* You should have received a copy of the GNU Library General Public *
|
|
* License along with this library; see the file COPYING.LIB. If not, *
|
|
* write to the Free Software Foundation, Inc., 59 Temple Place, *
|
|
* Suite 330, Boston, MA 02111-1307, USA *
|
|
* *
|
|
***************************************************************************/
|
|
|
|
|
|
namespace App
|
|
{
|
|
|
|
/// Type structure of FeaturePythonPyT
|
|
template<class FeaturePyT>
|
|
PyTypeObject FeaturePythonPyT<FeaturePyT>::Type = {
|
|
PyObject_HEAD_INIT(&PyType_Type)
|
|
0, /*ob_size*/
|
|
"FeaturePython", /*tp_name*/
|
|
sizeof(FeaturePythonPyT), /*tp_basicsize*/
|
|
0, /*tp_itemsize*/
|
|
/* methods */
|
|
FeaturePyT::PyDestructor, /*tp_dealloc*/
|
|
0, /*tp_print*/
|
|
FeaturePyT::__getattr, /*tp_getattr*/
|
|
__setattr, /*tp_setattr*/
|
|
0, /*tp_compare*/
|
|
0, /*tp_repr*/
|
|
0, /*tp_as_number*/
|
|
0, /*tp_as_sequence*/
|
|
0, /*tp_as_mapping*/
|
|
0, /*tp_hash*/
|
|
0, /*tp_call */
|
|
0, /*tp_str */
|
|
0, /*tp_getattro*/
|
|
0, /*tp_setattro*/
|
|
/* --- Functions to access object as input/output buffer ---------*/
|
|
0, /* tp_as_buffer */
|
|
/* --- Flags to define presence of optional/expanded features */
|
|
Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_CLASS, /*tp_flags */
|
|
"This is the father of all Feature classes", /*tp_doc */
|
|
0, /*tp_traverse */
|
|
0, /*tp_clear */
|
|
0, /*tp_richcompare */
|
|
0, /*tp_weaklistoffset */
|
|
0, /*tp_iter */
|
|
0, /*tp_iternext */
|
|
0, /*tp_methods */
|
|
0, /*tp_members */
|
|
0, /*tp_getset */
|
|
&FeaturePyT::Type, /*tp_base */
|
|
0, /*tp_dict */
|
|
0, /*tp_descr_get */
|
|
0, /*tp_descr_set */
|
|
0, /*tp_dictoffset */
|
|
FeaturePyT::__PyInit, /*tp_init */
|
|
0, /*tp_alloc */
|
|
0, /*tp_new */
|
|
0, /*tp_free Low-level free-memory routine */
|
|
0, /*tp_is_gc For PyObject_IS_GC */
|
|
0, /*tp_bases */
|
|
0, /*tp_mro method resolution order */
|
|
0, /*tp_cache */
|
|
0, /*tp_subclasses */
|
|
0, /*tp_weaklist */
|
|
0, /*tp_del */
|
|
0 /*tp_version_tag */
|
|
};
|
|
|
|
template<class FeaturePyT>
|
|
FeaturePythonPyT<FeaturePyT>::FeaturePythonPyT(Base::BaseClass *pcObject, PyTypeObject *T)
|
|
: FeaturePyT(reinterpret_cast<typename FeaturePyT::PointerType>(pcObject), T)
|
|
{
|
|
Base::PyGILStateLocker lock;
|
|
dict_methods = PyDict_New();
|
|
}
|
|
|
|
template<class FeaturePyT>
|
|
FeaturePythonPyT<FeaturePyT>::~FeaturePythonPyT()
|
|
{
|
|
Base::PyGILStateLocker lock;
|
|
Py_DECREF(dict_methods);
|
|
}
|
|
|
|
template<class FeaturePyT>
|
|
int FeaturePythonPyT<FeaturePyT>::__setattr(PyObject *obj, char *attr, PyObject *value)
|
|
{
|
|
// This overwrites PyObjectBase::__setattr because this actively disallows to delete an attribute
|
|
//
|
|
if (!static_cast<Base::PyObjectBase*>(obj)->isValid()){
|
|
PyErr_Format(PyExc_ReferenceError, "Cannot access attribute '%s' of deleted object", attr);
|
|
return -1;
|
|
}
|
|
|
|
int ret = static_cast<Base::PyObjectBase*>(obj)->_setattr(attr, value);
|
|
if (ret == 0) {
|
|
static_cast<Base::PyObjectBase*>(obj)->startNotify();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
template<class FeaturePyT>
|
|
int FeaturePythonPyT<FeaturePyT>::_setattr(char *attr, PyObject *value)
|
|
{
|
|
App::Property *prop = FeaturePyT::getPropertyContainerPtr()->getPropertyByName(attr);
|
|
if (prop && !value) {
|
|
PyErr_Format(PyExc_AttributeError, "Cannot delete attribute: '%s'", attr);
|
|
return -1;
|
|
}
|
|
|
|
int returnValue = FeaturePyT::_setattr(attr, value);
|
|
if (returnValue == -1) {
|
|
PyObject* dict_item = value;
|
|
if (value) {
|
|
if (PyFunction_Check(value)) {
|
|
PyErr_Clear();
|
|
dict_item = PyMethod_New(value, this, 0);
|
|
returnValue = PyDict_SetItemString(dict_methods, attr, dict_item);
|
|
Py_XDECREF(dict_item);
|
|
}
|
|
}
|
|
else {
|
|
// delete
|
|
PyErr_Clear();
|
|
returnValue = PyDict_DelItemString(dict_methods, attr);
|
|
if (returnValue < 0 && PyErr_ExceptionMatches(PyExc_KeyError))
|
|
PyErr_SetString(PyExc_AttributeError, attr);
|
|
}
|
|
}
|
|
return returnValue;
|
|
}
|
|
|
|
template<class FeaturePyT>
|
|
PyObject *FeaturePythonPyT<FeaturePyT>::_getattr(char *attr)
|
|
{
|
|
// See CallTipsList::extractTips
|
|
if (Base::streq(attr, "__fc_template__")) {
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
// get only attributes of this type
|
|
if (Base::streq(attr, "__dict__")) {
|
|
// Return the default dict
|
|
PyTypeObject *tp = this->ob_type;
|
|
// register type if needed
|
|
if (tp->tp_dict == NULL) {
|
|
if (PyType_Ready(tp) < 0)
|
|
return 0;
|
|
}
|
|
|
|
PyObject* dict = FeaturePyT::_getattr(attr);
|
|
if (dict && PyDict_CheckExact(dict)) {
|
|
PyObject* dict_old = dict;
|
|
dict = PyDict_Copy(dict_old);
|
|
Py_DECREF(dict_old); // delete old dict
|
|
PyDict_Merge(dict, dict_methods, 0);
|
|
}
|
|
return dict;
|
|
}
|
|
|
|
// find the attribute in the dict
|
|
PyObject *dict_item = NULL;
|
|
dict_item = PyDict_GetItemString(dict_methods, attr);
|
|
if (dict_item) {
|
|
Py_INCREF(dict_item);
|
|
return dict_item;
|
|
}
|
|
|
|
// search for the attribute in the base class
|
|
PyErr_Clear();
|
|
return FeaturePyT::_getattr(attr);
|
|
}
|
|
|
|
} //namespace App
|