Graffiti centers on where you click. (#9255)

* Graffiti centers on where you click.

* Oversights, and pixelshifted engravings.

* Better returns

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

@@ -4,25 +4,38 @@
 	icon = 'icons/obj/rune.dmi'
 	plane = DIRTY_PLANE
 	anchored = 1
+	var/art_type
+	var/art_color
+	var/art_shade
 
 /obj/effect/decal/cleanable/crayon/Initialize(var/ml, main = "#FFFFFF",shade = "#000000",var/type = "rune")
 	. = ..(ml, 0) // mapload, age
 	name = type
 	desc = "A [type] drawn in crayon."
 
+	// Persistence vars.
+	art_type = type
+	art_color = main
+	art_shade = shade
+
 	switch(type)
 		if("rune")
 			type = "rune[rand(1,6)]"
 		if("graffiti")
 			type = pick("amyjon","face","matt","revolution","engie","guy","end","dwarf","uboa")
 
-	var/icon/mainOverlay = new/icon('icons/effects/crayondecal.dmi',"[type]",2.1)
-	var/icon/shadeOverlay = new/icon('icons/effects/crayondecal.dmi',"[type]s",2.1)
+	update_icon()
 
-	mainOverlay.Blend(main,ICON_ADD)
-	shadeOverlay.Blend(shade,ICON_ADD)
+	add_hiddenprint(usr)
+
+/obj/effect/decal/cleanable/crayon/update_icon()
+	cut_overlays()
+	var/icon/mainOverlay = new/icon('icons/effects/crayondecal.dmi',"[art_type]",2.1)
+	var/icon/shadeOverlay = new/icon('icons/effects/crayondecal.dmi',"[art_type]s",2.1)
+
+	mainOverlay.Blend(art_color,ICON_ADD)
+	shadeOverlay.Blend(art_shade,ICON_ADD)
 
 	add_overlay(mainOverlay)
 	add_overlay(shadeOverlay)
-
-	add_hiddenprint(usr)
+	return

code/game/objects/items/crayons.dm

@@ -65,7 +65,7 @@
 	shadeColour = input(user, "Please select the shade colour.", "Crayon colour") as color
 	return
 
-/obj/item/pen/crayon/afterattack(atom/target, mob/user as mob, proximity)
+/obj/item/pen/crayon/afterattack(atom/target, mob/user as mob, proximity, click_parameters)
 	if(!proximity) return
 	if(istype(target,/turf/simulated/floor))
 		var/drawtype = input("Choose what you'd like to draw.", "Crayon scribbles") in list("graffiti","rune","letter","arrow")
@@ -93,7 +93,18 @@
 					return
 				to_chat(user, "You start drawing an arrow on the [target.name].")
 		if(instant || do_after(user, 50))
-			new /obj/effect/decal/cleanable/crayon(target,colour,shadeColour,drawtype)
+
+			var/list/mouse_control = params2list(click_parameters)
+			var/p_x = 0
+			var/p_y = 0
+			if(mouse_control["icon-x"])
+				p_x = text2num(mouse_control["icon-x"]) - 16
+			if(mouse_control["icon-y"])
+				p_y = text2num(mouse_control["icon-y"]) - 16
+
+			var/atom/new_graffiti = new /obj/effect/decal/cleanable/crayon(target,colour,shadeColour,drawtype)
+			new_graffiti.pixel_x = p_x
+			new_graffiti.pixel_y = p_y
 			to_chat(user, "You finish drawing.")
 
 			if(config.log_graffiti)
@@ -209,4 +220,4 @@
 		..()
 
 /obj/item/pen/crayon/attack_self(var/mob/user)
-	return
+	return

code/game/turfs/simulated/floor_attackby.dm

@@ -1,4 +1,4 @@
-/turf/simulated/floor/attackby(var/obj/item/C, var/mob/user)
+/turf/simulated/floor/attackby(var/obj/item/C, var/mob/user, attack_modifier, click_parameters)
 
 	if(!C || !user)
 		return 0
@@ -29,7 +29,7 @@
 		if(isliving(user))
 			var/mob/living/L = user
 			if(L.a_intent == I_HELP && L.is_preference_enabled(/datum/client_preference/engrave_graffiti))
-				try_graffiti(L, C)
+				try_graffiti(L, C, click_parameters)
 
 	if(istype(C, /obj/item/stack/tile/roofing))
 		var/expended_tile = FALSE // To track the case. If a ceiling is built in a multiz zlevel, it also necessarily roofs it against weather

code/game/turfs/simulated/wall_attacks.dm

@@ -127,12 +127,12 @@
 		return success_smash(user)
 	return fail_smash(user)
 
-/turf/simulated/wall/attackby(var/obj/item/W, var/mob/user)
+/turf/simulated/wall/attackby(var/obj/item/W, var/mob/user, attack_modifier, click_parameters)
 
 	user.setClickCooldown(user.get_attack_speed(W))
 
 	if(!construction_stage && user.a_intent == I_HELP && user.is_preference_enabled(/datum/client_preference/engrave_graffiti))
-		if(try_graffiti(user,W))
+		if(try_graffiti(user,W,click_parameters))
 			return
 
 	if (!user.IsAdvancedToolUser())
@@ -405,4 +405,4 @@
 		return
 
 	else if(!istype(W,/obj/item/rcd) && !istype(W, /obj/item/reagent_containers))
-		return attack_hand(user)
+		return attack_hand(user)

code/game/turfs/turf.dm

@@ -308,7 +308,7 @@
 /turf/proc/can_engrave()
 	return FALSE
 
-/turf/proc/try_graffiti(var/mob/vandal, var/obj/item/tool)
+/turf/proc/try_graffiti(var/mob/vandal, var/obj/item/tool, click_parameters)
 
 	if(!tool.sharp || !can_engrave())
 		return FALSE
@@ -341,6 +341,18 @@
 	graffiti.message = message
 	graffiti.author = vandal.ckey
 
+	if(click_parameters)
+		var/list/mouse_control = params2list(click_parameters)
+		var/p_x = 0
+		var/p_y = 0
+		if(mouse_control["icon-x"])
+			p_x = text2num(mouse_control["icon-x"]) - 16
+		if(mouse_control["icon-y"])
+			p_y = text2num(mouse_control["icon-y"]) - 16
+
+		graffiti.pixel_x = p_x
+		graffiti.pixel_y = p_y
+
 	if(lowertext(message) == "elbereth")
 		to_chat(vandal, "<span class='notice'>You feel much safer.</span>")