Method _replace_node

editor/docks/scene_tree_dock.cpp:3177–3291

}

void SceneTreeDock::_replace_node(Node *p_node, Node *p_by_node, bool p_keep_properties, bool p_remove_old) {
	ERR_FAIL_COND_MSG(!p_node->is_inside_tree(), "_replace_node() can't be called on a node outside of tree. You might have called it twice.");
	Node *oldnode = p_node;
	Node *newnode = p_by_node;

	if (p_keep_properties) {
		Node *default_oldnode = nullptr;

		// If we're dealing with a custom node type, we need to create a default instance of the custom type instead of the native type for property comparison.
		if (oldnode->has_meta(SceneStringName(_custom_type_script))) {
			Ref<Script> cts = PropertyUtils::get_custom_type_script(oldnode);
			ERR_FAIL_COND_MSG(cts.is_null(), "Invalid custom type script.");
			default_oldnode = Object::cast_to<Node>(get_editor_data()->script_class_instance(cts->get_global_name()));
			if (default_oldnode) {
				default_oldnode->set_name(cts->get_global_name());
				get_editor_data()->instantiate_object_properties(default_oldnode);
			} else {
				/// Legacy custom type, registered with "add_custom_type()".
				/// @todo Should probably be deprecated in 4.x.
				const EditorData::CustomType *custom_type = get_editor_data()->get_custom_type_by_path(cts->get_path());
				if (custom_type) {
					default_oldnode = Object::cast_to<Node>(get_editor_data()->instantiate_custom_type(custom_type->name, cts->get_instance_base_type()));
				}
			}
		}

		if (!default_oldnode) {
			default_oldnode = Object::cast_to<Node>(ClassDB::instantiate(oldnode->get_class()));
		}

		List<PropertyInfo> pinfo;
		oldnode->get_property_list(&pinfo);

		for (const PropertyInfo &E : pinfo) {
			if (!(E.usage & PROPERTY_USAGE_STORAGE)) {
				continue;
			}

			bool valid;
			const Variant &default_val = default_oldnode->get(E.name, &valid);
			if (!valid || default_val != oldnode->get(E.name)) {
				newnode->set(E.name, oldnode->get(E.name));
			}
		}

		memdelete(default_oldnode);
	}

	_push_item(nullptr);

	//reconnect signals
	List<MethodInfo> sl;

	oldnode->get_signal_list(&sl);
	for (const MethodInfo &E : sl) {
		List<Object::Connection> cl;
		oldnode->get_signal_connection_list(E.name, &cl);