[MIRROR] Firelocks can't close if an holofan is placed on their turf (#4891)

* Firelocks can't close if an holofan is placed on their turf (#58332)

* Firelocks can't close if an holofan is placed on their turf

Co-authored-by: Ghilker <42839747+Ghilker@users.noreply.github.com>

code/__DEFINES/traits.dm

@@ -440,6 +440,9 @@ Remember to update _globalvars/traits.dm if you're adding/removing/renaming trai
 /// Minor trait used for beakers, or beaker-ishes. [/obj/item/reagent_containers], to show that they've been used in a reagent grinder.
 #define TRAIT_MAY_CONTAIN_BLENDED_DUST "may_contain_blended_dust"
 
+///Trait applied to turfs when an atmos holosign is placed on them. It will stop firedoors from closing.
+#define TRAIT_FIREDOOR_STOP "firedoor_stop"
+
 //Medical Categories for quirks
 #define CAT_QUIRK_ALL 0
 #define CAT_QUIRK_NOTES 1

code/game/machinery/doors/firedoor.dm

@@ -224,6 +224,8 @@
 	latetoggle()
 
 /obj/machinery/door/firedoor/close()
+	if(HAS_TRAIT(loc, TRAIT_FIREDOOR_STOP))
+		return
 	. = ..()
 	latetoggle()
 

code/game/objects/structures/holosign.dm

@@ -106,14 +106,18 @@
 
 /obj/structure/holosign/barrier/atmos/Initialize()
 	. = ..()
+	var/turf/local = get_turf(loc)
+	ADD_TRAIT(local, TRAIT_FIREDOOR_STOP, TRAIT_GENERIC)
 	air_update_turf(TRUE, TRUE)
 
 /obj/structure/holosign/barrier/atmos/BlockSuperconductivity() //Didn't used to do this, but it's "normal", and will help ease heat flow transitions with the players.
 	return TRUE
 
 /obj/structure/holosign/barrier/atmos/Destroy()
-	. = ..()
+	var/turf/local = get_turf(loc)
+	REMOVE_TRAIT(local, TRAIT_FIREDOOR_STOP, TRAIT_GENERIC)
 	air_update_turf(TRUE, FALSE)
+	return ..()
 
 /obj/structure/holosign/barrier/cyborg
 	name = "Energy Field"