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