Part: Geometry Extension Python object

src/Mod/Part/App/GeometryExtensionPy.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<GenerateModel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="generateMetaModel_Module.xsd">
+  <PythonExport
+      Father="PyObjectBase"
+      Name="GeometryExtensionPy"
+      Twin="GeometryExtension"
+      TwinPointer="GeometryExtension"
+      Include="Mod/Part/App/Geometry.h"
+      Namespace="Part"
+      FatherInclude="Base/PyObjectBase.h"
+      FatherNamespace="Base"
+      Constructor="true"
+      Delete="true">
+    <Documentation>
+      <Author Licence="LGPL" Name="Abdullah Tahiri" EMail="abdullah.tahiri.yo@gmail.com" />
+      <UserDocu>The abstract class GeometryExtension enables to extend geometry objects with application specific data.</UserDocu>
+    </Documentation>
+    <Methode Name="copy" Const="true">
+      <Documentation>
+        <UserDocu>Create a copy of this geometry extension.</UserDocu>
+      </Documentation>
+    </Methode>
+  </PythonExport>
+</GenerateModel>

src/Mod/Part/App/GeometryExtensionPyImp.cpp

@@ -0,0 +1,91 @@
+/***************************************************************************
+ *   Copyright (c) 2019 Abdullah Tahiri <abdullah.tahiri.yo@gmail.com>     *
+ *                                                                         *
+ *   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                                *
+ *                                                                         *
+ ***************************************************************************/
+
+
+#include "PreCompiled.h"
+//#ifndef _PreComp_
+//# include <gp_Ax1.hxx>
+//#endif
+
+#include "Geometry.h" // For GeometryExtension
+#include "GeometryExtensionPy.h"
+#include "GeometryExtensionPy.cpp"
+
+using namespace Part;
+
+// returns a string which represents the object e.g. when printed in python
+std::string GeometryExtensionPy::representation(void) const
+{
+    return "<GeometryExtension object>";
+}
+
+PyObject *GeometryExtensionPy::PyMake(struct _typeobject *, PyObject *, PyObject *)  // Python wrapper
+{
+    // never create such objects with the constructor
+    PyErr_SetString(PyExc_RuntimeError,
+        "You cannot create an instance of the abstract class 'GeometryExtension'.");
+    return 0;
+}
+
+// constructor method
+int GeometryExtensionPy::PyInit(PyObject* /*args*/, PyObject* /*kwd*/)
+{
+    return 0;
+}
+
+PyObject* GeometryExtensionPy::copy(PyObject *args)
+{
+    if (!PyArg_ParseTuple(args, ""))
+        return NULL;
+
+    Part::GeometryExtension* ext = this->getGeometryExtensionPtr();
+    PyTypeObject* type = this->GetType();
+    PyObject* cpy = 0;
+    // let the type object decide
+    if (type->tp_new)
+        cpy = type->tp_new(type, this, 0);
+    if (!cpy) {
+        PyErr_SetString(PyExc_TypeError, "failed to create copy of geometry");
+        return 0;
+    }
+
+    Part::GeometryExtensionPy* extpy = static_cast<Part::GeometryExtensionPy*>(cpy);
+    // the PyMake function must have created the corresponding instance of the 'GeometryExtension' subclass
+    // so delete it now to avoid a memory leak
+    if (extpy->_pcTwinPointer) {
+        Part::GeometryExtension* clone = static_cast<Part::GeometryExtension*>(extpy->_pcTwinPointer);
+        delete clone;
+    }
+    extpy->_pcTwinPointer = ext->copy().get();
+    return cpy;
+}
+
+
+PyObject *GeometryExtensionPy::getCustomAttributes(const char* /*attr*/) const
+{
+    return 0;
+}
+
+int GeometryExtensionPy::setCustomAttributes(const char* /*attr*/, PyObject* /*obj*/)
+{
+    return 0;
+}