Merge pull request #8035 from PsiOmegaDelta/CanHasNano

NanoUI/Topic make-over

code/game/objects/items/devices/uplinks.dm

@@ -108,6 +108,9 @@ datum/nano_item_lists
 	return pick(random_items)
 
 /obj/item/device/uplink/Topic(href, href_list)
+	if(..())
+		return 1
+
 	if(href_list["buy_item"] == "random")
 		var/datum/uplink_item/UI = chooseRandomItem()
 		href_list["buy_item"] = UI.reference
@@ -208,10 +211,10 @@ datum/nano_item_lists
 // The purchasing code.
 /obj/item/device/uplink/hidden/Topic(href, href_list)
 	if (usr.stat || usr.restrained())
-		return
+		return 1
 
 	if (!( istype(usr, /mob/living/carbon/human)))
-		return 0
+		return 1
 	var/mob/user = usr
 	var/datum/nanoui/ui = nanomanager.get_open_ui(user, src, "main")
 	if ((usr.contents.Find(src.loc) || (in_range(src.loc, usr) && istype(src.loc.loc, /turf))))

code/game/objects/objs.dm

@@ -16,11 +16,14 @@
 	var/damtype = "brute"
 	var/force = 0
 
-/obj/Topic(href, href_list, var/nowindow = 0)
+/obj/Topic(href, href_list, var/nowindow = 0, var/checkrange = 1)
 	// Calling Topic without a corresponding window open causes runtime errors
-	if(nowindow)
-		return 0
-	return ..()
+	if(!nowindow && ..())
+		return 1
+	if(usr.can_interact_with_interface(src, checkrange) != STATUS_INTERACTIVE)
+		return 1
+	add_fingerprint(usr)
+	return 0
 
 /obj/item/proc/is_used_on(obj/O, mob/user)