Merge pull request #10151 from Ghommie/Ghommie-cit450

refactors area code to allow for multiple areas to share the same APC, fire, air alarms etc.

code/game/machinery/cell_charger.dm

@@ -46,7 +46,7 @@
 			var/area/a = loc.loc // Gets our locations location, like a dream within a dream
 			if(!isarea(a))
 				return
-			if(a.power_equip == 0) // There's no APC in this area, don't try to cheat power!
+			if(!a.powered(EQUIP)) // There's no APC in this area, don't try to cheat power!
 				to_chat(user, "<span class='warning'>[src] blinks red as you try to insert the cell!</span>")
 				return
 			if(!user.transferItemToLoc(W,src))

code/game/machinery/doors/firedoor.dm

@@ -44,7 +44,7 @@
 
 /obj/machinery/door/firedoor/proc/CalculateAffectingAreas()
 	remove_from_areas()
-	affecting_areas = get_adjacent_open_areas(src) | get_area(src)
+	affecting_areas = get_adjacent_open_areas(src) | get_base_area(src)
 	for(var/I in affecting_areas)
 		var/area/A = I
 		LAZYADD(A.firedoors, src)

code/game/machinery/firealarm.dm

@@ -44,7 +44,7 @@
 		pixel_x = (dir & 3)? 0 : (dir == 4 ? -24 : 24)
 		pixel_y = (dir & 3)? (dir ==1 ? -24 : 24) : 0
 	update_icon()
-	myarea = get_area(src)
+	myarea = get_base_area(src)
 	LAZYADD(myarea.firealarms, src)
 
 /obj/machinery/firealarm/Destroy()
@@ -124,7 +124,7 @@
 	if(!is_operational() || (last_alarm+FIREALARM_COOLDOWN > world.time))
 		return
 	last_alarm = world.time
-	var/area/A = get_area(src)
+	var/area/A = get_base_area(src)
 	A.firealert(src)
 	playsound(loc, 'goon/sound/machinery/FireAlarm.ogg', 75)
 	if(user)
@@ -133,7 +133,7 @@
 /obj/machinery/firealarm/proc/reset(mob/user)
 	if(!is_operational())
 		return
-	var/area/A = get_area(src)
+	var/area/A = get_base_area(src)
 	A.firereset(src)
 	if(user)
 		log_game("[user] reset a fire alarm at [COORD(src)]")
@@ -142,7 +142,7 @@
 	if(buildstage != 2)
 		return ..()
 	add_fingerprint(user)
-	var/area/A = get_area(src)
+	var/area/A = get_base_area(src)
 	if(A.fire)
 		reset(user)
 	else
@@ -322,7 +322,7 @@
 /obj/machinery/firealarm/partyalarm/reset()
 	if (stat & (NOPOWER|BROKEN))
 		return
-	var/area/A = get_area(src)
+	var/area/A = get_base_area(src)
 	if (!A || !A.party)
 		return
 	A.party = FALSE
@@ -331,7 +331,7 @@
 /obj/machinery/firealarm/partyalarm/alarm()
 	if (stat & (NOPOWER|BROKEN))
 		return
-	var/area/A = get_area(src)
+	var/area/A = get_base_area(src)
 	if (!A || A.party || A.name == "Space")
 		return
 	A.party = TRUE

code/game/machinery/recharger.dm

@@ -70,7 +70,7 @@
 
 			//Checks to make sure he's not in space doing it, and that the area got proper power.
 			var/area/a = get_area(src)
-			if(!isarea(a) || a.power_equip == 0)
+			if(!a || !a.powered(EQUIP))
 				to_chat(user, "<span class='notice'>[src] blinks red as you try to insert [G].</span>")
 				return 1