Expose Node::get_internal_mode()

[zaevi]

Expose Node::get_internal_mode() so that we can easily check if the child entered is a internal node:

extends ScrollContainer

func _init():
	child_entered_tree.connect(_child_entered_tree)

func _child_entered_tree(child : Node):
	if child.get_internal_mode() != INTERNAL_MODE_DISABLED:
		return # Ignore its two ScrollBars.

	print(child)

[AThousandShips]

See also (this doesn't fully close that as it's a broader topic):

• Make the "internal node" feature more accessible godot-proposals#4265

[timothyqiu]

If you only want to check if a node is internal, you can do something like:

func is_internal(node: Node) -> bool:
	var count := get_child_count()
	if count == 0:
		return true
	
	var index := node.get_index(true)
	if index < get_child(0).get_index(true):
		return true
	if index > get_child(get_child_count() - 1).get_index(true):
		return true
	return false

[timothyqiu]

The description of INTERNAL_MODE_* should also be updated accordingly. They were written for add_child() so "will" is used.

https://github.com/godotengine/godot/blob/fb2bd1f227e07f7facbf2692cf9ad2e2212bd41c/doc/classes/Node.xml#L1306-L1314

[zaevi]

Update the description of InternalMode as @timothyqiu suggested.

[Mickeon]

Not particularly urgent, but the descriptions of add_sibling(), find_child(), find_children(), get_child(), and more could use an update, as they refer to this value solely as the "internal parameter of add_child()"

[Mickeon]

Worth mentioning when this value is written to. You know as well as me it's in add_child()/add_sibling().

[zaevi]

Sorry I deleted this branch accidently. Restored now