Adds Preference for Graffiti Engraving + Alt-click engraving option

code/game/turfs/simulated/floor_attackby.dm

@@ -9,8 +9,11 @@
 			attack_tile(C, L) // Be on help intent if you want to decon something.
 			return
 
-	if(!(C.is_screwdriver() && flooring && (flooring.flags & TURF_REMOVE_SCREWDRIVER)) && try_graffiti(user, C))
-		return
+	if(!(C.has_tool_quality(TOOL_SCREWDRIVER) && flooring && (flooring.flags & TURF_REMOVE_SCREWDRIVER)))
+		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)
 
 	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
@@ -160,4 +163,11 @@
 		return
 	if(flooring)
 		return
-	attackby(T, user)
+	attackby(T, user)
+
+/turf/simulated/floor/AltClick(mob/user)
+	if(isliving(user))
+		var/mob/living/livingUser = user
+		if(try_graffiti(livingUser, livingUser.get_active_hand()))
+			return
+	. = ..()

code/game/turfs/simulated/wall_attacks.dm

@@ -131,8 +131,9 @@
 
 	user.setClickCooldown(user.get_attack_speed(W))
 
-	if(!construction_stage && try_graffiti(user, W))
-		return
+	if(!construction_stage && user.a_intent == I_HELP && user.is_preference_enabled(/datum/client_preference/engrave_graffiti))
+		if(try_graffiti(user,W))
+			return
 
 	if (!user.IsAdvancedToolUser())
 		to_chat(user, "<span class='warning'>You don't have the dexterity to do this!</span>")
@@ -407,3 +408,9 @@
 		return attack_hand(user)
 
 
+/turf/simulated/wall/AltClick(mob/user)
+	if(isliving(user))
+		var/mob/living/livingUser = user
+		if(try_graffiti(livingUser, livingUser.get_active_hand()))
+			return
+	. = ..()

code/modules/client/preference_setup/global/setting_datums.dm

@@ -298,6 +298,13 @@ var/list/_client_preferences_by_type
 	enabled_description = "Popup New On Login"
 	disabled_description = "Do Nothing"
 
+/datum/client_preference/engrave_graffiti
+	description = "Engrave Graffiti with Sharp Objects"
+	key = "ENGRAVE_GRAFFITI"
+	enabled_by_default = TRUE
+	enabled_description = "Enabled"
+	disabled_description = "Disabled"
+
 /********************
 * Staff Preferences *
 ********************/

code/modules/client/preferences_toggle_procs.dm

@@ -391,6 +391,19 @@
 
 	feedback_add_details("admin_verb","TRadioSounds")
 
+/client/verb/toggle_graffiti_engraving()
+	set name = "Toggle Graffiti Engraving"
+	set category = "Preferences"
+	set desc = "Enable/Disable engraving messages on hard surfaces with sharp objects on help intent."
+
+	var/pref_path = /datum/client_preference/engrave_graffiti
+	toggle_preference(pref_path)
+	SScharacter_setup.queue_preferences_save(prefs)
+
+	to_chat(src, "You will now [(is_preference_enabled(/datum/client_preference/TEngraveGraffiti)) ? "engrave" : "not engrave"] graffiti.")
+
+	feedback_add_details("admin_verb","TEngraveGraffiti")
+
 // Not attached to a pref datum because those are strict binary toggles
 /client/verb/toggle_examine_mode()
 	set name = "Toggle Examine Mode"