initial commit - cross reference with 5th port - obviously has compile errors

code/modules/tgui/states/contained.dm

@@ -0,0 +1,12 @@
+ /**
+  * tgui state: contained_state
+  *
+  * Checks that the user is inside the src_object.
+ **/
+
+/var/global/datum/ui_state/contained_state/contained_state = new()
+
+/datum/ui_state/contained_state/can_use_topic(atom/src_object, mob/user)
+	if(!src_object.contains(user))
+		return UI_CLOSE
+	return user.shared_ui_interaction(src_object)