1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/*
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"
#include "pbd/types_convert.h"
#include "pbd/property_list.h"
#include "pbd/demangle.h"
#include "pbd/i18n.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_changes was called on it.
* @param s Stateful object.
*/
StatefulDiffCommand::StatefulDiffCommand (boost::shared_ptr<StatefulDestructible> s)
: _object (s)
, _changes (0)
{
_changes = s->get_changes_as_properties (this);
/* if the stateful object that this command refers to goes away,
be sure to notify owners of this command.
*/
s->DropReferences.connect_same_thread (*this, boost::bind (&Destructible::drop_references, this));
}
StatefulDiffCommand::StatefulDiffCommand (boost::shared_ptr<StatefulDestructible> s, XMLNode const & n)
: _object (s)
, _changes (0)
{
const XMLNodeList& children (n.children());
for (XMLNodeList::const_iterator i = children.begin(); i != children.end(); ++i) {
if ((*i)->name() == X_("Changes")) {
_changes = s->property_factory (**i);
}
}
assert (_changes != 0);
/* if the stateful object that this command refers to goes away,
be sure to notify owners of this command.
*/
s->DropReferences.connect_same_thread (*this, boost::bind (&Destructible::drop_references, this));
}
StatefulDiffCommand::~StatefulDiffCommand ()
{
drop_references ();
delete _changes;
}
void
StatefulDiffCommand::operator() ()
{
boost::shared_ptr<Stateful> s (_object.lock());
if (s) {
s->apply_changes (*_changes);
}
}
void
StatefulDiffCommand::undo ()
{
boost::shared_ptr<Stateful> s (_object.lock());
if (s) {
PropertyList p = *_changes;
p.invert ();
s->apply_changes (p);
}
}
XMLNode&
StatefulDiffCommand::get_state ()
{
boost::shared_ptr<Stateful> s (_object.lock());
if (!s) {
/* XXX should we throw? */
return * new XMLNode("");
}
XMLNode* node = new XMLNode (X_("StatefulDiffCommand"));
node->set_property ("obj-id", s->id());
node->set_property ("type-name", demangled_name (*s.get()));
XMLNode* changes = new XMLNode (X_("Changes"));
_changes->get_changes_as_xml (changes);
node->add_child_nocopy (*changes);
return *node;
}
bool
StatefulDiffCommand::empty () const
{
return _changes->empty();
}
|
