126 lines
7.4 KiB
C++
126 lines
7.4 KiB
C++
// SPDX-License-Identifier: LGPL-2.1-or-later
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/***************************************************************************
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* Copyright (c) 2016 Stefan Tröger <stefantroeger@gmx.net> *
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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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#ifndef APP_EXTENSIONPYTHON_H
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#define APP_EXTENSIONPYTHON_H
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#include <Base/Interpreter.h>
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#include "Extension.h"
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#include "PropertyPythonObject.h"
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namespace App
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{
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/**
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* Generic Python extension class which allows every extension derived
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* class to behave as a Python extension -- simply by subclassing.
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*/
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template<class ExtensionT>
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class ExtensionPythonT: public ExtensionT // NOLINT
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{
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EXTENSION_PROPERTY_HEADER_WITH_OVERRIDE(App::ExtensionPythonT<ExtensionT>);
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public:
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using Inherited = ExtensionT;
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ExtensionPythonT()
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{
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ExtensionT::m_isPythonExtension = true;
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ExtensionT::initExtensionType(ExtensionPythonT::getExtensionClassTypeId());
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}
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~ExtensionPythonT() override = default;
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ExtensionPythonT(const ExtensionPythonT&) = delete;
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ExtensionPythonT(ExtensionPythonT&&) = delete;
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ExtensionPythonT& operator=(const ExtensionPythonT&) = delete;
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ExtensionPythonT& operator=(ExtensionPythonT&&) = delete;
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};
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using ExtensionPython = ExtensionPythonT<App::Extension>;
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// Helper macros to define python extensions
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#define EXTENSION_PROXY_FIRST(function) \
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Base::PyGILStateLocker lock; \
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Py::Object result; \
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try { \
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App::Property* proxy = this->getExtendedContainer()->getPropertyByName("Proxy"); \
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if (proxy && proxy->is<App::PropertyPythonObject>()) { \
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Py::Object feature = static_cast<App::PropertyPythonObject*>(proxy)->getValue(); \
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if (feature.hasAttr(std::string(#function))) { \
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if (feature.hasAttr("__object__")) { \
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Py::Callable method(feature.getAttr(std::string(#function)));
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#define EXTENSION_PROXY_SECOND(function) \
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result = method.apply(args); \
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} \
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else \
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{ \
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Py::Callable method(feature.getAttr(std::string(#function)));
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#define EXTENSION_PROXY_THIRD() \
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result = method.apply(args); \
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} \
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} \
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} \
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} \
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catch (Py::Exception&) \
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{ \
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Base::PyException e; \
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e.reportException(); \
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}
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#define EXTENSION_PROXY_NOARG(function) \
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EXTENSION_PROXY_FIRST(function) \
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Py::Tuple args; \
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EXTENSION_PROXY_SECOND(function) \
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Py::Tuple args(1); \
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args.setItem(0, Py::Object(this->getExtensionPyObject(), true)); \
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EXTENSION_PROXY_THIRD()
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#define EXTENSION_PROXY_ONEARG(function, arg) \
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EXTENSION_PROXY_FIRST(function) \
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Py::Tuple args; \
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args.setItem(0, arg); \
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EXTENSION_PROXY_SECOND(function) \
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Py::Tuple args(2); \
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args.setItem(0, Py::Object(this->getExtensionPyObject(), true)); \
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args.setItem(1, arg); \
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EXTENSION_PROXY_THIRD()
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#define EXTENSION_PYTHON_OVERRIDE_VOID_NOARGS(function) \
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virtual void function() override { EXTENSION_PROXY_NOARG(function) };
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#define EXTENSION_PYTHON_OVERRIDE_OBJECT_NOARGS(function) \
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virtual PyObject* function() override \
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{ \
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EXTENSION_PROXY_NOARG(function) \
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return result.ptr(); \
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};
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} // namespace App
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#endif // APP_EXTENSIONPYTHON_H
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