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

code/modules/tgui/states/hands.dm

@@ -0,0 +1,25 @@
+ /**
+  * tgui state: hands_state
+  *
+  * Checks that the src_object is in the user's hands.
+ **/
+
+/var/global/datum/ui_state/hands_state/hands_state = new()
+
+/datum/ui_state/hands_state/can_use_topic(src_object, mob/user)
+	. = user.shared_ui_interaction(src_object)
+	if(. > UI_CLOSE)
+		return min(., user.hands_can_use_topic(src_object))
+
+/mob/proc/hands_can_use_topic(src_object)
+	return UI_CLOSE
+
+/mob/living/hands_can_use_topic(src_object)
+	if(src_object in get_both_hands(src))
+		return UI_INTERACTIVE
+	return UI_CLOSE
+
+/mob/living/silicon/robot/hands_can_use_topic(src_object)
+	if(activated(src_object))
+		return UI_INTERACTIVE
+	return UI_CLOSE