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/*
Copyright (C) 2010 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "pbd/stateful_diff_command.h"
using namespace std;
using namespace PBD;
/** Create a new StatefulDiffCommand by examining the changes made to a Stateful
* since the last time that clear_history was called on it.
* @param s Stateful object.
*/
StatefulDiffCommand::StatefulDiffCommand (Stateful* s)
: _object (s)
{
pair<XMLNode *, XMLNode*> const p = s->diff ();
_before = p.first;
_after = p.second;
}
StatefulDiffCommand::~StatefulDiffCommand ()
{
delete _before;
delete _after;
}
void
StatefulDiffCommand::operator() ()
{
_object->set_state (*_after, Stateful::current_state_version);
}
void
StatefulDiffCommand::undo ()
{
_object->set_state (*_before, Stateful::current_state_version);
}
XMLNode&
StatefulDiffCommand::get_state ()
{
/* XXX */
}
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