copy nodes with connections

src/state-manager.h

@@ -44,6 +44,25 @@ class AppState{
 			}
 		}
 
+		void copyNodesAndConnections(Vec2D<float> position){
+			auto copy_nodes_ids = nm.nodes | std::ranges::views::values | std::ranges::views::filter([](Node n){return n.copied;}) | std::views::transform([](Node n){return n.id;}) | std::ranges::to<std::vector<int>>();
+
+			std::vector<Connection> copy_connections;
+			std::ranges::copy_if(cm.connections, std::back_inserter(copy_connections), [copy_nodes_ids](Connection c){return std::ranges::contains(copy_nodes_ids, c.v1) && std::ranges::contains(copy_nodes_ids, c.v2);});
+
+			for(auto &n : copy_nodes_ids){
+				int old_id = n;
+				int new_id = nm.copyNode(n, position + nm.nodes[n].drag_offset);
+				
+				for(auto &c : copy_connections){
+					if(c.v1 == old_id) c.v1 = new_id;
+					if(c.v2 == old_id) c.v2 = new_id;
+				}
+			}
+
+			cm.connections.insert(cm.connections.end(), copy_connections.cbegin(), copy_connections.cend());
+		}
+
 		void removeNodes(){
 
 			for(auto &n : nm.nodes){
@@ -66,8 +85,6 @@ class AppState{
 				if(!nm.nodes.at(c.v2).selected) adjacent_nodes_ids.push_back(c.v2);
 			}
 
-//			std::ranges::for_each(adjacent_nodes_ids, [this](int id){ nm.nodes.at(id).highlighted = true;} );
-
 			auto reroute_signals = sm.signals | std::ranges::views::filter([erase_nodes_ids](Signal s){
 				return std::ranges::contains(erase_nodes_ids, s.next);
 			});