Merge pull request #14482 from silicons/combat_v7

Combat v7 - Sprint removal, automatic block/parry, turns combat mode into a pure UI/interaction toggle with no side effects, and a truckload of other stuff.

code/game/objects/effects/decals/misc.dm

@@ -19,10 +19,62 @@
 	icon = 'icons/obj/chempuff.dmi'
 	pass_flags = PASSTABLE | PASSGRILLE
 	layer = FLY_LAYER
+	var/stream = FALSE
+	var/speed = 1
+	var/range = 3
+	var/hits_left = 3
+	var/range_left = 3
 
 /obj/effect/decal/chempuff/blob_act(obj/structure/blob/B)
 	return
 
+/obj/effect/decal/chempuff/Initialize(mapload, stream_mode, speed, range, hits_left)
+	. = ..()
+	stream = stream_mode
+	src.speed = speed
+	src.range = src.range_left = range
+	src.hits_left = hits_left
+
+/obj/effect/decal/chempuff/proc/hit_thing(atom/A)
+	if(A == src || A.invisibility)
+		return
+	if(!hits_left)
+		return
+	if(stream)
+		if(ismob(A))
+			var/mob/M = A
+			if(!M.lying || !range_left)
+				reagents.reaction(M, VAPOR)
+				hits_left--
+		else
+			if(!range_left)
+				reagents.reaction(A, VAPOR)
+	else
+		reagents.reaction(A)
+		if(ismob(A))
+			hits_left--
+
+/obj/effect/decal/chempuff/Crossed(atom/movable/AM, oldloc)
+	. = ..()
+	hit_thing(AM)
+
+/obj/effect/decal/chempuff/proc/run_puff(atom/target)
+	set waitfor = FALSE
+	for(var/i in 1 to range)
+		range_left--
+		if(!isturf(loc))
+			break
+		for(var/atom/T in loc)
+			hit_thing(T)
+			if(!hits_left || !isturf(loc))
+				break
+		if(hits_left && isturf(loc) && (!stream || !range_left))
+			reagents.reaction(loc, VAPOR)
+			hits_left--
+		if(!hits_left)
+			break
+	qdel(src)
+
 /obj/effect/decal/fakelattice
 	name = "lattice"
 	desc = "A lightweight support lattice."