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/debug.h"
24 #include "pbd/stateful.h"
25 #include "pbd/property_list.h"
26 #include "pbd/properties.h"
27 #include "pbd/destructible.h"
28 #include "pbd/filesystem.h"
29 #include "pbd/xml++.h"
30 #include "pbd/error.h"
38 int Stateful::current_state_version = 0;
39 int Stateful::loading_state_version = 0;
42 : _properties (new OwnedPropertyList)
48 Stateful::~Stateful ()
52 // Do not delete _extra_xml. The use of add_child_nocopy()
53 // means it needs to live on indefinately.
59 Stateful::add_extra_xml (XMLNode& node)
61 if (_extra_xml == 0) {
62 _extra_xml = new XMLNode ("Extra");
65 _extra_xml->remove_nodes (node.name());
66 _extra_xml->add_child_nocopy (node);
70 Stateful::extra_xml (const string& str)
72 if (_extra_xml == 0) {
76 const XMLNodeList& nlist = _extra_xml->children();
77 XMLNodeConstIterator i;
79 for (i = nlist.begin(); i != nlist.end(); ++i) {
80 if ((*i)->name() == str) {
89 Stateful::add_instant_xml (XMLNode& node, const sys::path& directory_path)
91 sys::create_directories (directory_path); // may throw
93 if (_instant_xml == 0) {
94 _instant_xml = new XMLNode ("instant");
97 _instant_xml->remove_nodes_and_delete (node.name());
98 _instant_xml->add_child_copy (node);
100 sys::path instant_xml_path(directory_path);
102 instant_xml_path /= "instant.xml";
105 tree.set_filename(instant_xml_path.to_string());
107 /* Important: the destructor for an XMLTree deletes
108 all of its nodes, starting at _root. We therefore
109 cannot simply hand it our persistent _instant_xml
110 node as its _root, because we will lose it whenever
111 the Tree goes out of scope.
113 So instead, copy the _instant_xml node (which does
114 a deep copy), and hand that to the tree.
117 XMLNode* copy = new XMLNode (*_instant_xml);
118 tree.set_root (copy);
121 error << string_compose(_("Error: could not write %1"), instant_xml_path.to_string()) << endmsg;
126 Stateful::instant_xml (const string& str, const sys::path& directory_path)
128 if (_instant_xml == 0) {
130 sys::path instant_xml_path(directory_path);
131 instant_xml_path /= "instant.xml";
133 if (exists(instant_xml_path)) {
135 if (tree.read(instant_xml_path.to_string())) {
136 _instant_xml = new XMLNode(*(tree.root()));
138 warning << string_compose(_("Could not understand XML file %1"), instant_xml_path.to_string()) << endmsg;
146 const XMLNodeList& nlist = _instant_xml->children();
147 XMLNodeConstIterator i;
149 for (i = nlist.begin(); i != nlist.end(); ++i) {
150 if ((*i)->name() == str) {
158 /** Forget about any old state for this object */
160 Stateful::clear_history ()
162 for (OwnedPropertyList::iterator i = _properties->begin(); i != _properties->end(); ++i) {
163 i->second->clear_history ();
168 Stateful::diff (PropertyList& before, PropertyList& after) const
170 for (OwnedPropertyList::const_iterator i = _properties->begin(); i != _properties->end(); ++i) {
171 i->second->diff (before, after);
175 /** Set state of some/all _properties from an XML node.
177 * @return PropertyChanges made.
180 Stateful::set_properties (XMLNode const & owner_state)
184 for (OwnedPropertyList::iterator i = _properties->begin(); i != _properties->end(); ++i) {
185 if (i->second->set_state_from_owner_state (owner_state)) {
196 Stateful::set_properties (const PropertyList& property_list)
199 PropertyList::const_iterator p;
201 DEBUG_TRACE (DEBUG::Stateful, string_compose ("Stateful %1 setting properties from list of %2\n", this, property_list.size()));
203 for (PropertyList::const_iterator pp = property_list.begin(); pp != property_list.end(); ++pp) {
204 DEBUG_TRACE (DEBUG::Stateful, string_compose ("in plist: %1\n", pp->second->property_name()));
207 for (PropertyList::const_iterator i = property_list.begin(); i != property_list.end(); ++i) {
208 if ((p = _properties->find (i->first)) != _properties->end()) {
209 DEBUG_TRACE (DEBUG::Stateful, string_compose ("actually setting property %1\n", p->second->property_name()));
210 if (set_property (*i->second)) {
214 DEBUG_TRACE (DEBUG::Stateful, string_compose ("passed in property %1 not found in own property list\n",
215 i->second->property_name()));
224 /** Add property states to an XML node.
228 Stateful::add_properties (XMLNode& owner_state)
230 for (OwnedPropertyList::iterator i = _properties->begin(); i != _properties->end(); ++i) {
231 i->second->add_state_to_owner_state (owner_state);
236 Stateful::add_property (PropertyBase& s)
238 _properties->add (s);