welding tool updates

code/game/objects/items/weapons/tools.dm

@@ -131,6 +131,7 @@
 	name = "welding tool"
 	icon = 'icons/obj/items.dmi'
 	icon_state = "welder"
+	item_state = "welder"
 	flags = CONDUCT
 	slot_flags = SLOT_BELT
 	force = 3
@@ -147,9 +148,27 @@
 	var/max_fuel = 20 	//The max amount of fuel the welder can hold
 
 /obj/item/weapon/weldingtool/New()
+	..()
 	create_reagents(max_fuel)
 	reagents.add_reagent("fuel", max_fuel)
+	update_icon()
+	return
 
+/obj/item/weapon/weldingtool/proc/update_torch()
+	if(welding)
+		src.overlays = 0
+		overlays += "["-won"]"
+		item_state = "welder1"
+	else
+		item_state = "welder"
+
+/obj/item/weapon/weldingtool/update_icon()
+	src.overlays = 0
+	var/ratio = get_fuel() / max_fuel
+	ratio = Ceiling(ratio*4) * 25
+	icon_state = "[initial(icon_state)][ratio]"
+	update_torch()
+	return
 
 /obj/item/weapon/weldingtool/examine(mob/user)
 	..()
@@ -182,19 +201,16 @@
 /obj/item/weapon/weldingtool/process()
 	switch(welding)
 		if(0)
-			if(icon_state != "welder")	//Check that the sprite is correct, if it isnt, it means toggle() was not called
-				force = 3
-				damtype = "brute"
-				icon_state = "welder"
-				welding = 0
+			force = 3
+			damtype = "brute"
+			update_icon()
 			processing_objects.Remove(src)
 			return
 	//Welders left on now use up fuel, but lets not have them run out quite that fast
 		if(1)
-			if(icon_state != "welder1")	//Check that the sprite is correct, if it isnt, it means toggle() was not called
-				force = 15
-				damtype = "fire"
-				icon_state = "welder1"
+			force = 15
+			damtype = "fire"
+			update_icon()
 			if(prob(5))
 				remove_fuel(1)
 
@@ -215,6 +231,7 @@
 			O.reagents.trans_to(src, max_fuel)
 			user << "<span class='notice'>[src] refueled.</span>"
 			playsound(src.loc, 'sound/effects/refill.ogg', 50, 1, -6)
+			update_icon()
 			return
 		else
 			message_admins("[key_name_admin(user)] triggered a fueltank explosion.")
@@ -234,7 +251,7 @@
 
 /obj/item/weapon/weldingtool/attack_self(mob/user)
 	toggle(user)
-
+	update_icon()
 
 //Returns the amount of fuel in the welder
 /obj/item/weapon/weldingtool/proc/get_fuel()
@@ -444,4 +461,4 @@
 	throw_speed = 3
 	throw_range = 3
 	m_amt = 66
-	icon_state = "crowbar_large"
+	icon_state = "crowbar_large"