2 Copyright (C) 2010 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "pbd/stateful_diff_command.h"
26 /** Create a new StatefulDiffCommand by examining the changes made to a Stateful
27 * since the last time that clear_history was called on it.
28 * @param s Stateful object.
31 StatefulDiffCommand::StatefulDiffCommand (boost::shared_ptr<Stateful> s)
34 pair<XMLNode *, XMLNode*> const p = s->diff ();
39 StatefulDiffCommand::StatefulDiffCommand (boost::shared_ptr<Stateful> s, XMLNode const & n)
42 _before = new XMLNode (*n.children().front());
43 _after = new XMLNode (*n.children().back());
47 StatefulDiffCommand::~StatefulDiffCommand ()
54 StatefulDiffCommand::operator() ()
56 boost::shared_ptr<Stateful> s (_object.lock());
59 s->set_state (*_after, Stateful::current_state_version);
64 StatefulDiffCommand::undo ()
66 boost::shared_ptr<Stateful> s (_object.lock());
69 s->set_state (*_before, Stateful::current_state_version);
74 StatefulDiffCommand::get_state ()
76 boost::shared_ptr<Stateful> s (_object.lock());
79 /* XXX should we throw? */
80 return * new XMLNode("");
83 XMLNode* node = new XMLNode (X_("StatefulDiffCommand"));
85 node->add_property ("obj-id", s->id().to_s());
86 node->add_property ("type-name", typeid(*s.get()).name());
87 node->add_child_copy (*_before);
88 node->add_child_copy (*_after);