Add new line decals. (#29907)

* Add new line decals.

* undefs

* remove redundant alpha

* fix lint

code/game/objects/items/devices/painter/decal_painter.dm

@@ -1,11 +1,40 @@
+/datum/asset/spritesheet/decal_painter
+	name = "decal_painter"
+	var/obj/effect/turf_decal/current_typepath
+
+/datum/asset/spritesheet/decal_painter/create_spritesheets()
+	// The first sprite we insert is a blank 32x32 icon. This means that when we
+	// generate class names for icon state/direction combinations that don't
+	// exist, the ones with non-existent class names will instead just point to the
+	// first image on the sheet.
+	Insert("blank", 'icons/turf/decals.dmi', "blank")
+	for(var/obj/effect/turf_decal/decal_type as anything in subtypesof(/obj/effect/turf_decal))
+		current_typepath = decal_type
+		var/decal_classname = replace_characters("[decal_type]", list("/" = "_"))
+		if(decal_type::icon_state == "")
+			continue
+		for(var/direction in GLOB.alldirs)
+			Insert(
+				"[decal_classname]_[direction]",
+				decal_type::icon,
+				decal_type::icon_state,
+				direction,
+			)
+
+/datum/asset/spritesheet/decal_painter/ModifyInserted(icon/pre_asset)
+	var/icon/parent = ..()
+	if(current_typepath && current_typepath::color)
+		parent.Blend(current_typepath::color, ICON_MULTIPLY)
+	return parent
+
 /datum/painter/decal
 	module_name = "decal painter"
 	module_state = "decal_painter"
 	/// icon that contains the decal sprites
 	var/decal_icon = 'icons/turf/decals.dmi'
-	/// icon_state of the selected decal
-	var/decal_state = "warn_box"
-	var/decal_dir = SOUTH
+	var/selected_type = /obj/effect/turf_decal/stripes/box
+	var/selected_dir = SOUTH
+	var/selected_category = DECAL_PAINTER_CATEGORY_STANDARD
 	/// When removal_mode is TRUE the decal painter will remove decals instead
 	var/removal_mode = FALSE
 	var/max_decals = 3
@@ -18,7 +47,7 @@
 			/obj/effect/turf_decal/sand
 		)
 	)
-	/// Assoc list with icon_state of the decal as the key, and decal path as the value.
+	/// List of typepaths of turf decals exposed by the painter.
 	var/static/list/lookup_cache_decals = list()
 
 /datum/painter/decal/New(obj/item/painter/parent_painter)
@@ -28,7 +57,9 @@
 			var/obj/effect/turf_decal/decal = D
 			if(decal in decal_blacklist)
 				continue
-			lookup_cache_decals[decal::icon_state] = decal
+			if(decal::icon_state == "blank")
+				continue
+			lookup_cache_decals += decal
 
 /datum/painter/decal/paint_atom(atom/target, mob/user)
 	if(!istype(target, /turf/simulated/floor))
@@ -42,8 +73,9 @@
 	if(length(decals) >= max_decals)
 		to_chat(user, "<span class='warning'>You can't fit more decals on [target].</span>")
 		return FALSE
-	var/typepath = lookup_cache_decals[decal_state]
-	new typepath(target_turf, decal_dir)
+
+	if(ispath(selected_type, /obj/effect/turf_decal))
+		new selected_type(target_turf, selected_dir)
 	return TRUE
 
 /datum/painter/decal/pick_color(mob/user)
@@ -63,19 +95,39 @@
 
 /datum/painter/decal/ui_data(mob/user)
 	var/list/data = list()
-	data["selectedStyle"] = decal_state
-	data["selectedDir"] = decal_dir
+	data["selectedDecalType"] = selected_type
+	data["selectedDir"] = selected_dir
+	data["selectedCategory"] = selected_category
 	data["removalMode"] = removal_mode
 
 	return data
 
-
 /datum/painter/decal/ui_static_data(mob/user)
-	var/list/data = list()
-	data["icon"] = decal_icon
-	data["availableStyles"] = list()
-	for(var/decal in lookup_cache_decals)
-		data["availableStyles"] += decal
+	var/static/list/data
+	if(!data)
+		data = list()
+		data["categories"] = list(
+			DECAL_PAINTER_CATEGORY_STANDARD,
+			DECAL_PAINTER_CATEGORY_THIN,
+			DECAL_PAINTER_CATEGORY_THICK,
+			DECAL_PAINTER_CATEGORY_SQUARE,
+			DECAL_PAINTER_CATEGORY_ALPHANUM,
+		)
+		data["icon"] = decal_icon
+		var/list/availableStyles = list()
+
+		for(var/decal in lookup_cache_decals)
+			var/obj/effect/turf_decal/decal_type = decal
+			if(!(decal_type::painter_category in availableStyles))
+				availableStyles[decal_type::painter_category] = list()
+			availableStyles[decal_type::painter_category] += list(list(
+				"icon" = decal_type::icon,
+				"icon_state" = decal_type::icon_state,
+				"color" = decal_type::color,
+				"typepath" = decal_type,
+			))
+
+		data["availableStyles"] = availableStyles
 
 	return data
 
@@ -83,32 +135,29 @@
 	if(..())
 		return
 
-	if(action == "select_style")
-		var/new_style = params["style"]
-		if(lookup_cache_decals.Find(new_style) != 0)
-			decal_state = new_style
+	switch(action)
+		if("set_category")
+			selected_category = params["category"]
+		if("set_direction")
+			var/new_dir = params["direction"]
 			removal_mode = FALSE
+			if(new_dir != 0)
+				selected_dir = new_dir
+		if("set_decal_type")
+			var/new_decal_type = text2path(params["decal_type"])
+			if(ispath(new_decal_type))
+				selected_type = new_decal_type
+				removal_mode = FALSE
+		if("toggle_removal_mode")
+			removal_mode = !removal_mode
 
-	if(action == "cycle_style") // Cycles through the available styles one at a time
-		var/index = lookup_cache_decals.Find(decal_state) // Find the index of the currently selected style in the lookup cache
-		index += params["offset"] // Offset is either -1 or 1. Add this to the index to get the style before or after the current style.
-		if(index < 1) // If the index is below 1, loop back to the last item in the cache.
-			index = length(lookup_cache_decals)
-		if(index > length(lookup_cache_decals)) // If the index is above the length of the cache, loop back to the first item in the cache.
-			index = 1
-		decal_state = lookup_cache_decals[index] // Then set our state to the index
-		removal_mode = FALSE
-
-	if(action == "select_direction")
-		var/dir = params["direction"]
-		removal_mode = FALSE
-		if(dir != 0)
-			decal_dir = dir
-
-	if(action == "removal_mode")
-		removal_mode = !removal_mode
 	return TRUE
 
+/datum/painter/decal/ui_assets(mob/user)
+	return list(
+		get_asset_datum(/datum/asset/spritesheet/decal_painter)
+	)
+
 /datum/painter/decal/proc/remove_decals(atom/target)
 	var/turf/target_turf = get_turf(target)
 	var/list/datum/element/decal/decals = target_turf.get_decals()