+ PBD::ID id;
+ XMLNode *before = 0, *after = 0;
+ XMLNode *child = 0;
+
+ /* get id */
+
+ /* XXX: HACK! */
+ bool have_id = n->property("obj-id") != 0;
+ if (have_id) {
+ id = PBD::ID(n->property("obj-id")->value());
+ }
+
+ /* get before/after */
+
+ if (n->name() == "MementoCommand") {
+ before = new XMLNode(*n->children().front());
+ after = new XMLNode(*n->children().back());
+ child = before;
+ } else if (n->name() == "MementoUndoCommand") {
+ before = new XMLNode(*n->children().front());
+ child = before;
+ } else if (n->name() == "MementoRedoCommand") {
+ after = new XMLNode(*n->children().front());
+ child = after;
+ } else if (n->name() == "PlaylistCommand") {
+ before = new XMLNode(*n->children().front());
+ after = new XMLNode(*n->children().back());
+ child = before;
+ }
+
+ if (!child) {
+ error << string_compose (_("Tried to reconstitute a MementoCommand with no contents, failing. id=%1"), id.to_s()) << endmsg;
+ return 0;
+ }
+
+ /* create command */
+ std::string obj_T = n->property ("type-name")->value();
+
+ if (obj_T == "ARDOUR::AudioRegion" || obj_T == "ARDOUR::MidiRegion" || obj_T == "ARDOUR::Region") {
+ boost::shared_ptr<Region> r = RegionFactory::region_by_id (id);
+ if (r) {
+ return new MementoCommand<Region>(*r, before, after);
+ }
+
+ } else if (obj_T == "ARDOUR::AudioSource" || obj_T == "ARDOUR::MidiSource") {
+ if (sources.count(id))
+ return new MementoCommand<Source>(*sources[id], before, after);
+
+ } else if (obj_T == "ARDOUR::Location") {
+ Location* loc = _locations->get_location_by_id(id);
+ if (loc) {
+ return new MementoCommand<Location>(*loc, before, after);
+ }
+
+ } else if (obj_T == "ARDOUR::Locations") {
+ return new MementoCommand<Locations>(*_locations, before, after);
+
+ } else if (obj_T == "ARDOUR::TempoMap") {
+ return new MementoCommand<TempoMap>(*_tempo_map, before, after);
+
+ } else if (obj_T == "ARDOUR::Playlist" || obj_T == "ARDOUR::AudioPlaylist" || obj_T == "ARDOUR::MidiPlaylist") {
+ if (boost::shared_ptr<Playlist> pl = playlists->by_name(child->property("name")->value())) {
+ return new MementoCommand<Playlist>(*(pl.get()), before, after);
+ }
+
+ } else if (obj_T == "ARDOUR::Route" || obj_T == "ARDOUR::AudioTrack" || obj_T == "ARDOUR::MidiTrack") {
+ if (boost::shared_ptr<Route> r = route_by_id(id)) {
+ return new MementoCommand<Route>(*r, before, after);
+ } else {
+ error << string_compose (X_("Route %1 not found in session"), id) << endmsg;
+ }
+
+ } else if (obj_T == "Evoral::Curve" || obj_T == "ARDOUR::AutomationList") {
+ if (have_id) {
+ std::map<PBD::ID, AutomationList*>::iterator i = automation_lists.find(id);
+ if (i != automation_lists.end()) {
+ return new MementoCommand<AutomationList>(*i->second, before, after);
+ }
+ } else {
+ return new MementoCommand<AutomationList> (
+ new MidiAutomationListBinder (n, sources),
+ before, after
+ );
+ }
+
+ std::cerr << "Alist " << id << " not found\n";
+
+ } else if (registry.count(id)) { // For Editor and AutomationLine which are off-limits herea
+ return new MementoCommand<PBD::StatefulDestructible>(*registry[id], before, after);
+ }
+
+ /* we failed */
+ error << string_compose (_("could not reconstitute MementoCommand from XMLNode. object type = %1 id = %2"), obj_T, id.to_s()) << endmsg;
+
+ return 0 ;