Increasing reference count, when open Resource in Inspector

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1

Godot Version

Godot 4.3-stable_win64

Question

While writing an editor plugin, I mentioned that my edited resource continue hanging somewhere and not going to be free.

Going deeper, I excluded my editor plugin widget as a potentional reason of resource hanging and wrote the next simple code in my plugin.gd:

@tool
extends EditorPlugin

var _inspector: EditorInspector = null

func _enter_tree() -> void:
	_inspector = get_editor_interface().get_inspector()
	_inspector.edited_object_changed.connect(_on_edited_object_changed)
	_on_edited_object_changed()

func _exit_tree() -> void:
	_inspector.edited_object_changed.disconnect(_on_edited_object_changed)
	_inspector = null

func _on_edited_object_changed():
	var _object = _inspector.get_edited_object()
	if _object is Resource:
		print("Object ref count = ", _object.get_reference_count())

Switching between any resource increase its reference count by some value (1 more often, but sometimes 2 and more).

Maybe editor caches resources for some purpose. Does anyone know the reason of such behaviour? And is it normal?

2

Yes, the editor caches the resource. I’m not 100% sure about this but I think it gets cached as part of the editor history.