Method _update_node_subtree

editor/scene/scene_tree_editor.cpp:282–393

}

void SceneTreeEditor::_update_node_subtree(Node *p_node, TreeItem *p_parent, bool p_force) {
	if (!p_node) {
		return;
	}

	// Only owned nodes are editable, since nodes can create their own (manually owned) child nodes,
	// which the editor needs not to know about.

	bool part_of_subscene = false;

	if (!display_foreign && p_node->get_owner() != get_scene_node() && p_node != get_scene_node()) {
		if ((show_enabled_subscene || can_open_instance) && p_node->get_owner() && (get_scene_node()->is_editable_instance(p_node->get_owner()))) {
			part_of_subscene = true;
			// Allow.
		} else {
			// Stale node, remove recursively.
			node_cache.remove(p_node, true);
			return;
		}
	} else {
		part_of_subscene = p_node != get_scene_node() && get_scene_node()->get_scene_inherited_state().is_valid() && get_scene_node()->get_scene_inherited_state()->find_node_by_path(get_scene_node()->get_path_to(p_node)) >= 0;
	}

	HashMap<Node *, CachedNode>::Iterator I = node_cache.get(p_node);
	TreeItem *item = nullptr;

	bool is_new = false;

	if (I) {
		item = I->value.item;
		TreeItem *current_parent = item->get_parent();

		// Our parent might be re-created because of a changed type.
		if (p_parent && p_parent != current_parent) {
			if (current_parent) {
				current_parent->remove_child(item);
			}
			p_parent->add_child(item);
			I->value.removed = false;
			_move_node_item(p_parent, I);
		}

		if (I->value.has_moved_children) {
			_move_node_children(I);
		}
	} else {
		int index = -1;
		// Check to see if there is a root node for us to reuse.
		if (!p_parent) {
			item = tree->get_root();
			if (!item) {
				item = tree->create_item(nullptr);
				index = 0;
			}
		} else {
			index = p_node->get_index(false);
			item = tree->create_item(p_parent, index);
		}