2 Copyright (C) 2000-2001 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.
18 $Id: stateful.cc 629 2006-06-21 23:01:03Z paul $
23 #include <pbd/stateful.h>
24 #include <pbd/filesystem.h>
25 #include <pbd/xml++.h>
26 #include <pbd/error.h>
38 Stateful::~Stateful ()
40 // Do not delete _extra_xml. The use of add_child_nocopy()
41 // means it needs to live on indefinately.
49 Stateful::add_extra_xml (XMLNode& node)
51 if (_extra_xml == 0) {
52 _extra_xml = new XMLNode ("extra");
55 _extra_xml->remove_nodes (node.name());
56 _extra_xml->add_child_nocopy (node);
60 Stateful::extra_xml (const string& str)
62 if (_extra_xml == 0) {
66 const XMLNodeList& nlist = _extra_xml->children();
67 XMLNodeConstIterator i;
69 for (i = nlist.begin(); i != nlist.end(); ++i) {
70 if ((*i)->name() == str) {
79 Stateful::add_instant_xml (XMLNode& node, const sys::path& directory_path)
81 sys::create_directories (directory_path); // may throw
83 if (_instant_xml == 0) {
84 _instant_xml = new XMLNode ("instant");
87 _instant_xml->remove_nodes_and_delete (node.name());
88 _instant_xml->add_child_copy (node);
90 sys::path instant_xml_path(directory_path);
92 instant_xml_path /= "instant.xml";
95 tree.set_filename(instant_xml_path.to_string());
97 /* Important: the destructor for an XMLTree deletes
98 all of its nodes, starting at _root. We therefore
99 cannot simply hand it our persistent _instant_xml
100 node as its _root, because we will lose it whenever
101 the Tree goes out of scope.
103 So instead, copy the _instant_xml node (which does
104 a deep copy), and hand that to the tree.
107 XMLNode* copy = new XMLNode (*_instant_xml);
108 tree.set_root (copy);
111 error << string_compose(_("Error: could not write %1"), instant_xml_path.to_string()) << endmsg;
116 Stateful::instant_xml (const string& str, const sys::path& directory_path)
118 if (_instant_xml == 0) {
120 sys::path instant_xml_path(directory_path);
121 instant_xml_path /= "instant.xml";
123 if (exists(instant_xml_path)) {
125 if (tree.read(instant_xml_path.to_string())) {
126 _instant_xml = new XMLNode(*(tree.root()));
128 warning << string_compose(_("Could not understand XML file %1"), instant_xml_path.to_string()) << endmsg;
136 const XMLNodeList& nlist = _instant_xml->children();
137 XMLNodeConstIterator i;
139 for (i = nlist.begin(); i != nlist.end(); ++i) {
140 if ((*i)->name() == str) {