/* * Copyright (C) 2007-2015 Paul Davis * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef __lib_pbd_functor_command_h__ #define __lib_pbd_functor_command_h__ #include #include #include #include #include "pbd/libpbd_visibility.h" #include "pbd/xml++.h" #include "pbd/shiva.h" #include "pbd/command.h" #include "pbd/failed_constructor.h" /** This command class is initialized */ namespace PBD { template class /*LIBPBD_API*/ FunctorCommand : public PBD::Command { private: typedef void (obj_type::*functor_type)(arg_type); typedef std::map< std::string, functor_type > FunctorMap; typedef typename FunctorMap::iterator FunctorMapIterator; public: FunctorCommand(std::string functor, obj_type& object, arg_type b, arg_type a) : functor_name(functor) , object(object) , before(b) , after(a) { method = find_functor(functor); /* catch destruction of the object */ new PBD::Shiva< obj_type, FunctorCommand > (object, *this); } ~FunctorCommand() { GoingAway(); } void operator() () { (object.*method) (after); } void undo() { (object.*method) (before); } virtual XMLNode &get_state() { std::stringstream ss; XMLNode *node = new XMLNode("FunctorCommand"); node->add_property("type_name", typeid(obj_type).name()); node->add_property("functor", functor_name); ss << before; node->add_property("before", ss.str()); ss.clear (); ss << after; node->add_property("after", ss.str()); return *node; } static void register_functor(std::string name, functor_type f) { functor_map[name] = f; } private: static functor_type find_functor(std::string name) { FunctorMapIterator iter; if((iter = functor_map.find(name)) == functor_map.end()) { throw failed_constructor(); } return iter->second; } protected: std::string functor_name; obj_type &object; arg_type before; arg_type after; functor_type method; static FunctorMap functor_map; }; // static initialization of functor_map... template typename FunctorCommand::FunctorMap FunctorCommand::functor_map; }; #endif // __lib_pbd_functor_command_h__