add copying and pasting nodes

classes/deck/deck.gd

@@ -59,6 +59,7 @@ func add_node_inst(node: DeckNode, assign_id: String = "", assign_to_self: bool
 		node._id = uuid
 	else:
 		nodes[assign_id] = node
+		node._id = assign_id
 
 	node_added.emit(node)
 
@@ -197,6 +198,86 @@ func get_group(uuid: String) -> Deck:
 	return groups.get(uuid)
 
 
+func copy_nodes_json(nodes_to_copy: Array[String]) -> String:
+	var d := {"nodes": {}}
+
+	for node_id: String in nodes_to_copy:
+		d.nodes[node_id] = get_node(node_id).to_dict()
+
+	for node: String in d.nodes:
+		var outgoing_connections: Dictionary = d.nodes[node].outgoing_connections.duplicate(true)
+
+		for from_port: int in outgoing_connections:
+			for to_node: String in outgoing_connections[from_port]:
+				if !(to_node in nodes_to_copy):
+					(d.nodes[node].outgoing_connections[from_port] as Dictionary).erase(to_node)
+
+		var incoming_connections: Dictionary = d.nodes[node].incoming_connections.duplicate(true)
+
+		for to_port: int in incoming_connections:
+			for from_node: String in incoming_connections[to_port]:
+				if !(from_node in nodes_to_copy):
+					(d.nodes[node].incoming_connections[to_port] as Dictionary).erase(from_node)
+
+	for node: Dictionary in d.nodes.values().slice(1):
+		node.position.x = node.position.x - d.nodes.values()[0].position.x
+		node.position.y = node.position.y - d.nodes.values()[0].position.y
+
+	d.nodes.values()[0].position.x = 0
+	d.nodes.values()[0].position.y = 0
+
+	return JSON.stringify(d)
+
+
+func allocate_ids(count: int) -> Array[String]:
+	var res: Array[String]
+	for i in count:
+		res.append(UUID.v4())
+	return res
+
+
+func paste_nodes_from_json(json: String, position: Vector2 = Vector2()) -> void:
+	var d: Dictionary = JSON.parse_string(json) as Dictionary
+	if !d.get("nodes"):
+		return
+
+	var new_ids := allocate_ids(d.nodes.size())
+	var ids_map := {}
+	for i: int in d.nodes.keys().size():
+		var node_id: String = d.nodes.keys()[i]
+		ids_map[node_id] = new_ids[i]
+
+	var new_json := json
+	for old_id: String in ids_map:
+		new_json = new_json.replace(old_id, ids_map[old_id])
+
+	for node_id: String in d.nodes:
+		d.nodes[node_id]._id = ids_map[node_id]
+
+		d.nodes[node_id].position.x += position.x
+		d.nodes[node_id].position.y += position.y
+
+		var outgoing_connections: Dictionary = d.nodes[node_id].outgoing_connections as Dictionary
+		var outgoing_connections_res := {}
+		for from_port: String in outgoing_connections:
+			outgoing_connections_res[from_port] = {}
+			for to_node_id: String in outgoing_connections[from_port]:
+				outgoing_connections_res[from_port][ids_map[to_node_id]] = outgoing_connections[from_port][to_node_id]
+
+		var incoming_connections: Dictionary = d.nodes[node_id].incoming_connections as Dictionary
+		var incoming_connections_res := {}
+		for to_port: String in incoming_connections:
+			incoming_connections_res[to_port] = {}
+			for from_node_id: String in incoming_connections[to_port]:
+				incoming_connections_res[to_port][ids_map[from_node_id]] = incoming_connections[to_port][from_node_id]
+
+		d.nodes[node_id].outgoing_connections = outgoing_connections_res
+		d.nodes[node_id].incoming_connections = incoming_connections_res
+
+		var node := DeckNode.from_dict(d.nodes[node_id])
+		add_node_inst(node, ids_map[node_id])
+
+
 ## Returns a [Dictionary] representation of this deck.
 func to_dict(with_meta: bool = true) -> Dictionary:
 	var inner := {
@@ -239,44 +320,8 @@ static func from_dict(data: Dictionary, path: String = "") -> Deck:
 	var nodes_data: Dictionary = data.deck.nodes as Dictionary
 
 	for node_id in nodes_data:
-		var node := deck.add_node_type(nodes_data[node_id].node_type, node_id, false)
-		node._id = node_id
-		node.name = nodes_data[node_id].name
-		node._belonging_to = deck
-		node.position = nodes_data[node_id].position
-
-		for prop in nodes_data[node_id].props:
-			node.set(prop, nodes_data[node_id].props[prop])
-
-		node._pre_connection()
-
-		for from_port: String in nodes_data[node_id].outgoing_connections:
-			var connection_data: Dictionary = nodes_data[node_id].outgoing_connections[from_port]
-			node.outgoing_connections[int(from_port)] = {}
-			for to_node: String in connection_data:
-				var input_ports: Array = connection_data[to_node]
-				node.outgoing_connections[int(from_port)][to_node] = []
-				for to_input_port in input_ports:
-					node.outgoing_connections[int(from_port)][to_node].append(int(to_input_port))
-
-		for to_port: String in nodes_data[node_id].incoming_connections:
-			var connection_data = nodes_data[node_id].incoming_connections[to_port]
-			for connection in connection_data:
-				connection_data[connection] = int(connection_data[connection])
-			node.incoming_connections[int(to_port)] = connection_data
-
-		for i in node.ports.size():
-			var port_value: Variant
-			if (nodes_data[node_id].port_values as Array).size() <= i:
-				port_value = null
-			else:
-				port_value = (nodes_data[node_id].port_values as Array)[i]
-			node.ports[i].value = port_value
-
-		for key in nodes_data[node_id].meta:
-			node.set_meta(key, str_to_var(nodes_data[node_id].meta[key]))
-
-		node._post_load()
+		var node := DeckNode.from_dict(nodes_data[node_id])
+		deck.add_node_inst(node, node_id)
 
 	var groups_data: Dictionary = data.deck.groups as Dictionary
 

classes/deck/deck_node.gd

@@ -250,12 +250,12 @@ func to_dict(with_meta: bool = true) -> Dictionary:
 	var d := {
 		"_id": _id,
 		"name": name,
-		"outgoing_connections": outgoing_connections,
-		"incoming_connections": incoming_connections,
+		"outgoing_connections": outgoing_connections.duplicate(true),
+		"incoming_connections": incoming_connections.duplicate(true),
 		"props": {},
 		"node_type": node_type,
 		"port_values": [],
-		"position": position,
+		"position": position.duplicate(),
 	}
 
 	for prop in props_to_serialize:
@@ -273,6 +273,48 @@ func to_dict(with_meta: bool = true) -> Dictionary:
 	return d
 
 
+static func from_dict(data: Dictionary) -> DeckNode:
+	var node := NodeDB.instance_node(data.node_type)
+	#node._id = data._id
+	node.name = data.name
+	node.position = data.position
+
+	for prop in data.props:
+		node.set(prop, data.props[prop])
+
+	node._pre_connection()
+
+	for from_port: String in data.outgoing_connections:
+		var connection_data: Dictionary = data.outgoing_connections[from_port]
+		node.outgoing_connections[int(from_port)] = {}
+		for to_node: String in connection_data:
+			var input_ports: Array = connection_data[to_node]
+			node.outgoing_connections[int(from_port)][to_node] = []
+			for to_input_port in input_ports:
+				node.outgoing_connections[int(from_port)][to_node].append(int(to_input_port))
+
+	for to_port: String in data.incoming_connections:
+		var connection_data = data.incoming_connections[to_port]
+		for connection in connection_data:
+			connection_data[connection] = int(connection_data[connection])
+		node.incoming_connections[int(to_port)] = connection_data
+
+	for i in node.ports.size():
+		var port_value: Variant
+		if (data.port_values as Array).size() <= i:
+			port_value = null
+		else:
+			port_value = (data.port_values as Array)[i]
+		node.ports[i].value = port_value
+
+	for key in data.meta:
+		node.set_meta(key, str_to_var(data.meta[key]))
+
+	node._post_load()
+
+	return node
+
+
 ## Returns the node's [member position] as a [Vector2].
 func position_as_vector2() -> Vector2:
 	return Vector2(position.x, position.y)

graph_node_renderer/deck_renderer_graph_edit.gd

@@ -129,10 +129,13 @@ func refresh_connections() -> void:
 		for from_port in node.outgoing_connections:
 			for to_node_id: String in node.outgoing_connections[from_port]:
 				var to_node_ports = node.outgoing_connections[from_port][to_node_id]
-				var to_node: DeckNodeRendererGraphNode = get_children().filter(
+				var renderer: Array = get_children().filter(
 					func(c: DeckNodeRendererGraphNode):
 						return c.node._id == to_node_id
-				)[0]
+				)
+				if renderer.is_empty():
+					break
+				var to_node: DeckNodeRendererGraphNode = renderer[0]
 				for to_node_port: int in to_node_ports:
 					connect_node(
 						from_node.name,
@@ -148,6 +151,8 @@ func _on_deck_node_added(node: DeckNode) -> void:
 	inst.node = node
 	add_child(inst)
 	inst.position_offset = inst.node.position_as_vector2()
+	clear_connections()
+	refresh_connections()
 
 ## Connected to [signal Deck.node_added], used to remove the specified
 ## [DeckNodeRendererGraphNode] and queue_free it.
@@ -229,5 +234,28 @@ func _on_delete_nodes_request(nodes: Array[StringName]) -> void:
 	for node_id in node_ids:
 		deck.remove_node(node_id, true)
 
-	#await get_tree().process_frame
 	refresh_connections()
+
+
+func _on_copy_nodes_request() -> void:
+	var selected := get_selected_nodes()
+	if selected.is_empty():
+		return
+
+	var selected_ids: Array[String]
+	selected_ids.assign(selected.map(
+		func(x: DeckNodeRendererGraphNode):
+			return x.node._id
+			))
+
+	DisplayServer.clipboard_set(deck.copy_nodes_json(selected_ids))
+
+
+func _on_paste_nodes_request() -> void:
+	var clip := DisplayServer.clipboard_get()
+	var node_pos := (get_local_mouse_position() + scroll_offset - (Vector2(75.0, 0.0) * zoom)) / zoom
+
+	if snapping_enabled:
+		node_pos = node_pos.snapped(Vector2(snapping_distance, snapping_distance))
+
+	deck.paste_nodes_from_json(clip, node_pos)

graph_node_renderer/deck_renderer_graph_edit.tscn

@@ -12,6 +12,8 @@ right_disconnects = true
 show_arrange_button = false
 script = ExtResource("1_pojfs")
 
+[connection signal="copy_nodes_request" from="." to="." method="_on_copy_nodes_request"]
 [connection signal="delete_nodes_request" from="." to="." method="_on_delete_nodes_request"]
+[connection signal="paste_nodes_request" from="." to="." method="_on_paste_nodes_request"]
 [connection signal="popup_request" from="." to="." method="_on_popup_request"]
 [connection signal="scroll_offset_changed" from="." to="." method="_on_scroll_offset_changed"]