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 <glibmm/fileutils.h>
24 #include <glibmm/miscutils.h>
26 #include "pbd/debug.h"
27 #include "pbd/stateful.h"
28 #include "pbd/property_list.h"
29 #include "pbd/properties.h"
30 #include "pbd/destructible.h"
31 #include "pbd/xml++.h"
32 #include "pbd/error.h"
40 int Stateful::current_state_version = 0;
41 int Stateful::loading_state_version = 0;
44 : _properties (new OwnedPropertyList)
45 , _stateful_frozen (0)
51 Stateful::~Stateful ()
55 // Do not delete _extra_xml. The use of add_child_nocopy()
56 // means it needs to live on indefinately.
62 Stateful::add_extra_xml (XMLNode& node)
64 if (_extra_xml == 0) {
65 _extra_xml = new XMLNode ("Extra");
68 _extra_xml->remove_nodes (node.name());
69 _extra_xml->add_child_nocopy (node);
73 Stateful::extra_xml (const string& str, bool add_if_missing)
78 node = _extra_xml->child (str.c_str());
81 if (!node && add_if_missing) {
82 node = new XMLNode (str);
83 add_extra_xml (*node);
90 Stateful::save_extra_xml (const XMLNode& node)
92 /* Looks for the child node called "Extra" and makes _extra_xml
93 point to a copy of it. Will delete any existing node pointed
94 to by _extra_xml if a new Extra node is found, but not
98 const XMLNode* xtra = node.child ("Extra");
102 _extra_xml = new XMLNode (*xtra);
107 Stateful::add_instant_xml (XMLNode& node, const std::string& directory_path)
109 if (!Glib::file_test (directory_path, Glib::FILE_TEST_IS_DIR)) {
110 if (g_mkdir_with_parents (directory_path.c_str(), 0755) != 0) {
111 error << string_compose(_("Error: could not create directory %1"), directory_path) << endmsg;
116 if (_instant_xml == 0) {
117 _instant_xml = new XMLNode ("instant");
120 _instant_xml->remove_nodes_and_delete (node.name());
121 _instant_xml->add_child_copy (node);
123 std::string instant_xml_path = Glib::build_filename (directory_path, "instant.xml");
126 tree.set_filename(instant_xml_path);
128 /* Important: the destructor for an XMLTree deletes
129 all of its nodes, starting at _root. We therefore
130 cannot simply hand it our persistent _instant_xml
131 node as its _root, because we will lose it whenever
132 the Tree goes out of scope.
134 So instead, copy the _instant_xml node (which does
135 a deep copy), and hand that to the tree.
138 XMLNode* copy = new XMLNode (*_instant_xml);
139 tree.set_root (copy);
142 error << string_compose(_("Error: could not write %1"), instant_xml_path) << endmsg;
147 Stateful::instant_xml (const string& str, const std::string& directory_path)
149 if (_instant_xml == 0) {
151 std::string instant_xml_path = Glib::build_filename (directory_path, "instant.xml");
153 if (Glib::file_test (instant_xml_path, Glib::FILE_TEST_EXISTS)) {
155 if (tree.read(instant_xml_path)) {
156 _instant_xml = new XMLNode(*(tree.root()));
158 warning << string_compose(_("Could not understand XML file %1"), instant_xml_path) << endmsg;
166 const XMLNodeList& nlist = _instant_xml->children();
167 XMLNodeConstIterator i;
169 for (i = nlist.begin(); i != nlist.end(); ++i) {
170 if ((*i)->name() == str) {
178 /** Forget about any changes to this object's properties */
180 Stateful::clear_changes ()
182 for (OwnedPropertyList::iterator i = _properties->begin(); i != _properties->end(); ++i) {
183 i->second->clear_changes ();
188 Stateful::get_changes_as_properties (Command* cmd) const
190 PropertyList* pl = new PropertyList;
192 for (OwnedPropertyList::const_iterator i = _properties->begin(); i != _properties->end(); ++i) {
193 i->second->get_changes_as_properties (*pl, cmd);
199 /** Set our property values from an XML node.
200 * Derived types can call this from set_state() (or elsewhere)
201 * to get basic property setting done.
202 * @return IDs of properties that were changed.
205 Stateful::set_values (XMLNode const & node)
209 for (OwnedPropertyList::iterator i = _properties->begin(); i != _properties->end(); ++i) {
210 if (i->second->set_value (node)) {
221 Stateful::apply_changes (const PropertyList& property_list)
224 PropertyList::const_iterator p;
226 DEBUG_TRACE (DEBUG::Stateful, string_compose ("Stateful %1 setting properties from list of %2\n", this, property_list.size()));
228 for (PropertyList::const_iterator pp = property_list.begin(); pp != property_list.end(); ++pp) {
229 DEBUG_TRACE (DEBUG::Stateful, string_compose ("in plist: %1\n", pp->second->property_name()));
232 for (PropertyList::const_iterator i = property_list.begin(); i != property_list.end(); ++i) {
233 if ((p = _properties->find (i->first)) != _properties->end()) {
237 string_compose ("actually setting property %1 using %2\n", p->second->property_name(), i->second->property_name())
240 if (apply_changes (*i->second)) {
244 DEBUG_TRACE (DEBUG::Stateful, string_compose ("passed in property %1 not found in own property list\n",
245 i->second->property_name()));
256 /** Add property states to an XML node.
257 * @param owner_state Node.
260 Stateful::add_properties (XMLNode& owner_state)
262 for (OwnedPropertyList::iterator i = _properties->begin(); i != _properties->end(); ++i) {
263 i->second->get_value (owner_state);
268 Stateful::add_property (PropertyBase& s)
270 _properties->add (s);
274 Stateful::send_change (const PropertyChange& what_changed)
276 if (what_changed.empty()) {
281 Glib::Threads::Mutex::Lock lm (_lock);
282 if (property_changes_suspended ()) {
283 _pending_changed.add (what_changed);
288 PropertyChanged (what_changed);
292 Stateful::suspend_property_changes ()
294 g_atomic_int_add (&_stateful_frozen, 1);
298 Stateful::resume_property_changes ()
300 PropertyChange what_changed;
303 Glib::Threads::Mutex::Lock lm (_lock);
305 if (property_changes_suspended() && g_atomic_int_dec_and_test (&_stateful_frozen) == FALSE) {
309 if (!_pending_changed.empty()) {
310 what_changed = _pending_changed;
311 _pending_changed.clear ();
315 mid_thaw (what_changed);
317 send_change (what_changed);
321 Stateful::changed() const
323 for (OwnedPropertyList::const_iterator i = _properties->begin(); i != _properties->end(); ++i) {
324 if (i->second->changed()) {
333 Stateful::apply_changes (const PropertyBase& prop)
335 OwnedPropertyList::iterator i = _properties->find (prop.property_id());
336 if (i == _properties->end()) {
340 i->second->apply_changes (&prop);
345 Stateful::property_factory (const XMLNode& history_node) const
347 PropertyList* prop_list = new PropertyList;
349 for (OwnedPropertyList::const_iterator i = _properties->begin(); i != _properties->end(); ++i) {
350 PropertyBase* prop = i->second->clone_from_xml (history_node);
353 prop_list->add (prop);
361 Stateful::rdiff (vector<Command*>& cmds) const
363 for (OwnedPropertyList::const_iterator i = _properties->begin(); i != _properties->end(); ++i) {
364 i->second->rdiff (cmds);
369 Stateful::clear_owned_changes ()
371 for (OwnedPropertyList::iterator i = _properties->begin(); i != _properties->end(); ++i) {
372 i->second->clear_owned_changes ();
377 Stateful::set_id (const XMLNode& node)
379 const XMLProperty* prop;
381 if ((prop = node.property ("id")) != 0) {
382 _id = prop->value ();
390 Stateful::reset_id ()
396 Stateful::set_id (const string& str)