e6af511f39
========================================================================================= - Long overdue refactor to avoid repetition during save/restore and copy. - New interface to notify an extension when it is attached. It also enables the extension to gain a pointer to the geometry container. This is intended to extend the functionality already existing in Part::Geometry.
180 lines
7.3 KiB
C++
180 lines
7.3 KiB
C++
/***************************************************************************
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* Copyright (c) 2019 Abdullah Tahiri <abdullah.tahiri.yo@gmail.com> *
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* *
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* This file is part of the FreeCAD CAx development system. *
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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* This library is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Library General Public License for more details. *
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* *
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* You should have received a copy of the GNU Library General Public *
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* License along with this library; see the file COPYING.LIB. If not, *
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* write to the Free Software Foundation, Inc., 59 Temple Place, *
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* Suite 330, Boston, MA 02111-1307, USA *
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* *
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***************************************************************************/
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#include "PreCompiled.h"
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#include <Base/Writer.h>
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#include <Base/Reader.h>
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#include <Base/Tools.h>
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#include <Base/Exception.h>
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#include "GeometryDefaultExtension.h"
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#include "GeometryStringExtensionPy.h"
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#include "GeometryIntExtensionPy.h"
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#include "GeometryBoolExtensionPy.h"
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#include "GeometryDoubleExtensionPy.h"
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using namespace Part;
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//---------- Geometry Extension
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template <typename T>
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GeometryDefaultExtension<T>::GeometryDefaultExtension(const T& val, std::string name):value(val)
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{
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setName(name);
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}
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template <typename T>
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void GeometryDefaultExtension<T>::copyAttributes(Part::GeometryExtension * cpy) const
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{
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Part::GeometryPersistenceExtension::copyAttributes(cpy);
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static_cast<GeometryDefaultExtension<T> *>(cpy)->value = this->value;
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}
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template <typename T>
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void GeometryDefaultExtension<T>::restoreAttributes(Base::XMLReader &reader)
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{
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Part::GeometryPersistenceExtension::restoreAttributes(reader);
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value = reader.getAttribute("value");
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}
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template <typename T>
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void GeometryDefaultExtension<T>::saveAttributes(Base::Writer &writer) const
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{
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Part::GeometryPersistenceExtension::saveAttributes(writer);
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writer.Stream() << "\" value=\"" << value;
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}
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template <typename T>
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std::unique_ptr<Part::GeometryExtension> GeometryDefaultExtension<T>::copy(void) const
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{
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std::unique_ptr<GeometryDefaultExtension<T>> cpy = std::make_unique<GeometryDefaultExtension<T>>();
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copyAttributes(cpy.get());
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#if (defined(__GNUC__) && __GNUC__ < 7 ) || defined(_MSC_VER)
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return std::move(cpy); // GCC 4.8 and MSC do not support automatic move constructor call if the compiler fails to elide
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#else
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return cpy; // all the others do automatic move constructor if RVO optimization not possible.
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#endif
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// Advise from Scott Meyers Effective Modern c++:
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//
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// Don't std::move(cpy); RVO optimization Item 25, if the compiler fails to elide, would have to move it anyway
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// move constructor is executed if available (it is). Unique_ptr does not have copy constructor.
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//
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// That would work perfectly with GCC 7.3.0. However, GCC 4.8.4 misserably fails:
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//
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// /home/travis/build/FreeCAD/FreeCAD/src/Mod/Part/App/GeometryDefaultExtension.cpp: In instantiation of
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// ‘std::unique_ptr<Part::GeometryExtension> Part::GeometryDefaultExtension<T>::copy() const [with T = long int]’:
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// /home/travis/build/FreeCAD/FreeCAD/src/Mod/Part/App/GeometryDefaultExtension.cpp:164:16: required from here
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// /home/travis/build/FreeCAD/FreeCAD/src/Mod/Part/App/GeometryDefaultExtension.cpp:84:12: error: cannot bind //
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// ‘std::unique_ptr<Part::GeometryDefaultExtension<long int>, std::default_delete<Part::GeometryDefaultExtension<long int> > >’ lvalue
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// to ‘std::unique_ptr<Part::GeometryDefaultExtension<long int>, std::default_delete<Part::GeometryDefaultExtension<long int> > >&&’
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}
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template <typename T>
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PyObject * GeometryDefaultExtension<T>::getPyObject(void)
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{
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THROWM(Base::NotImplementedError,"Python object not implemented for default geometry extension template type. Template Specialisation missing."); // use template specialisation to provide the actual object
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}
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namespace Part {
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// ----------------------------- Template specialisations----------------------------------------------------
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//typedef Part::GeometryDefaultExtension<long> GeometryIntExtension;
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//typedef Part::GeometryStringExtension<std::string> GeometryStringExtension;
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// ---------- GeometryIntExtension ----------
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TYPESYSTEM_SOURCE_TEMPLATE_T(Part::GeometryIntExtension,Part::GeometryPersistenceExtension)
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template <>
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PyObject * GeometryDefaultExtension<long>::getPyObject(void)
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{
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return new GeometryIntExtensionPy(new GeometryIntExtension(*this));
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}
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template <>
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void GeometryDefaultExtension<long>::restoreAttributes(Base::XMLReader &reader)
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{
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Part::GeometryPersistenceExtension::restoreAttributes(reader);
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value = reader.getAttributeAsInteger("value");
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}
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// ---------- GeometryStringExtension ----------
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TYPESYSTEM_SOURCE_TEMPLATE_T(Part::GeometryStringExtension,Part::GeometryPersistenceExtension)
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template <>
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PyObject * GeometryDefaultExtension<std::string>::getPyObject(void)
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{
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return new GeometryStringExtensionPy(new GeometryStringExtension(*this));
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}
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// ---------- GeometryBoolExtension ----------
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TYPESYSTEM_SOURCE_TEMPLATE_T(Part::GeometryBoolExtension,Part::GeometryPersistenceExtension)
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template <>
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PyObject * GeometryDefaultExtension<bool>::getPyObject(void)
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{
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return new GeometryBoolExtensionPy(new GeometryBoolExtension(*this));
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}
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template <>
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void GeometryDefaultExtension<bool>::restoreAttributes(Base::XMLReader &reader)
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{
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Part::GeometryPersistenceExtension::restoreAttributes(reader);
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value = (bool)reader.getAttributeAsInteger("value");
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}
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// ---------- GeometryDoubleExtension ----------
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TYPESYSTEM_SOURCE_TEMPLATE_T(Part::GeometryDoubleExtension,Part::GeometryPersistenceExtension)
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template <>
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PyObject * GeometryDefaultExtension<double>::getPyObject(void)
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{
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return new GeometryDoubleExtensionPy(new GeometryDoubleExtension(*this));
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}
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template <>
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void GeometryDefaultExtension<double>::restoreAttributes(Base::XMLReader &reader)
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{
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Part::GeometryPersistenceExtension::restoreAttributes(reader);
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value = reader.getAttributeAsFloat("value");
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}
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// instantiate the types so that other translation units (python wrappers) can access template
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//constructors other than the default.
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template class GeometryDefaultExtension<long>;
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template class GeometryDefaultExtension<std::string>;
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template class GeometryDefaultExtension<bool>;
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template class GeometryDefaultExtension<double>;
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} //namespace Part
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