[MIRROR] Ports Janihud rework from Outpost 21. (#9549)

Co-authored-by: Heroman3003 <31296024+Heroman3003@users.noreply.github.com>
Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>

code/game/objects/effects/chem/coating.dm

@@ -34,3 +34,5 @@
 /obj/effect/decal/cleanable/chemcoating/update_icon()
 	..()
 	color = reagents.get_color()
+	cut_overlays()
+	add_janitor_hud_overlay()

code/game/objects/effects/decals/Cleanable/aliens.dm

@@ -13,6 +13,8 @@
 
 /obj/effect/decal/cleanable/blood/gibs/xeno/update_icon()
 	color = "#FFFFFF"
+	cut_overlays()
+	add_janitor_hud_overlay()
 
 /obj/effect/decal/cleanable/blood/gibs/xeno/up
 	random_icon_states = list("xgib1", "xgib2", "xgib3", "xgib4", "xgib5", "xgib6","xgibup1","xgibup1","xgibup1")
@@ -30,4 +32,4 @@
 	random_icon_states = list("xgibmid1", "xgibmid2", "xgibmid3")
 
 /obj/effect/decal/cleanable/blood/xtracks
-	basecolor = "#05EE05"
+	basecolor = "#05EE05"

code/game/objects/effects/decals/Cleanable/humans.dm

@@ -70,6 +70,8 @@ var/global/list/image/splatter_cache=list()
 	else
 		name = initial(name)
 		desc = initial(desc)
+	cut_overlays()
+	add_janitor_hud_overlay()
 
 /obj/effect/decal/cleanable/blood/Crossed(mob/living/carbon/human/perp)
 	if(perp.is_incorporeal())
@@ -210,6 +212,7 @@ var/global/list/image/splatter_cache=list()
 	icon = blood
 	cut_overlays()
 	add_overlay(giblets)
+	add_janitor_hud_overlay()
 
 /obj/effect/decal/cleanable/blood/gibs/up
 	random_icon_states = list("gib1", "gib2", "gib3", "gib5", "gib6","gibup1","gibup1","gibup1")

code/game/objects/effects/decals/Cleanable/robots.dm

@@ -10,6 +10,8 @@
 
 /obj/effect/decal/cleanable/blood/gibs/robot/update_icon()
 	color = "#FFFFFF"
+	cut_overlays()
+	add_janitor_hud_overlay()
 
 /obj/effect/decal/cleanable/blood/gibs/robot/dry()	//pieces of robots do not dry up like
 	return
@@ -49,4 +51,4 @@
 
 /obj/effect/decal/cleanable/blood/oil/streak
 	random_icon_states = list("mgibbl1", "mgibbl2", "mgibbl3", "mgibbl4", "mgibbl5")
-	amount = 2
+	amount = 2

code/game/objects/effects/decals/Cleanable/tracks.dm

@@ -142,6 +142,7 @@ var/global/list/image/fluidtrack_cache=list()
 		stack[stack_idx]=track
 		add_overlay(I)
 	updatedtracks=0 // Clear our memory of updated tracks.
+	add_janitor_hud_overlay()
 
 /obj/effect/decal/cleanable/blood/tracks/footprints
 	name = "wet footprints"

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

@@ -12,7 +12,6 @@ generic_filth = TRUE means when the decal is saved, it will be switched out for
 	var/generic_filth = FALSE
 	var/age = 0
 	var/list/random_icon_states = list()
-	var/obj/effect/decal/jan_hud/jan_icon = null
 
 /obj/effect/decal/cleanable/Initialize(var/mapload, var/_age)
 	if(!isnull(_age))
@@ -21,12 +20,11 @@ generic_filth = TRUE means when the decal is saved, it will be switched out for
 		src.icon_state = pick(src.random_icon_states)
 	if(!mapload || !CONFIG_GET(flag/persistence_ignore_mapload))
 		SSpersistence.track_value(src, /datum/persistent/filth)
-	jan_icon = new/obj/effect/decal/jan_hud(src.loc)
 	. = ..()
+	update_icon()
 
 /obj/effect/decal/cleanable/Destroy()
 	SSpersistence.forget_value(src, /datum/persistent/filth)
-	QDEL_NULL(jan_icon)
 	. = ..()
 
 /obj/effect/decal/cleanable/clean_blood(var/ignore = 0)
@@ -40,13 +38,25 @@ generic_filth = TRUE means when the decal is saved, it will be switched out for
 		src.icon_state = pick(src.random_icon_states)
 	..()
 
-/obj/effect/decal/jan_hud
-	plane = PLANE_JANHUD
-	layer = BELOW_MOB_LAYER
-	vis_flags = VIS_HIDE
-	persist_storable = FALSE
-	icon = 'icons/mob/hud.dmi'
-	mouse_opacity = 0
 
-/obj/effect/decal/jan_hud/Initialize()
-	src.icon_state = "janhud[rand(1,9)]"
+/obj/effect/decal/cleanable/update_icon()
+	// Overrides should not inheret from this, and instead replace it entirely to match this in some form.
+	// add_janitor_hud_overlay() does not pre-cut overlays, so cut_overlays() must be called first.
+	// This is so it may be used with update_icon() overrides that use overlays, while adding the janitor overlay at the end.
+	cut_overlays()
+	add_janitor_hud_overlay()
+
+
+/obj/effect/decal/cleanable/proc/add_janitor_hud_overlay()
+	// This was original a seperate object that followed the grime, it got stuck in everything you can imagine!
+	// It also likely doubled the memory use of every cleanable decal on station...
+	var/image/hud = image('icons/mob/hud.dmi', src, "janhud[rand(1,9)]")
+	hud.appearance_flags = (RESET_COLOR|PIXEL_SCALE|KEEP_APART)
+	hud.plane = PLANE_JANHUD
+	hud.layer = BELOW_MOB_LAYER
+	hud.mouse_opacity = 0
+	//HUD VARIANT: Allows the hud to show up with it's normal alpha, even if the 'dirty thing' it's attached to has a low alpha (ex: dirt). If you want to disable it, simply comment out the lines between the 'HUD VARIANT' tag!
+	hud.appearance_flags = RESET_ALPHA
+	hud.alpha = 255
+	//HUD VARIANT end
+	add_overlay(hud)

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

@@ -5,17 +5,15 @@
 	plane = DIRTY_PLANE
 	layer = DIRTY_LAYER
 	anchored = TRUE
-// CHOMPEdit Start - Pretty much all of this file changed
 	var/art_type
 	var/art_color
 	var/art_shade
 
 /obj/effect/decal/cleanable/crayon/Initialize(var/ml, main = "#FFFFFF",shade = "#000000",var/type = "rune", new_age = 0)
-	. = ..(ml, new_age) // mapload, age
 	name = type
 	desc = "A [type] drawn in crayon."
 
-	// Persistence vars.
+	// Persistence vars. Unused here but used downstream. If someone updates the persistance code, it's here.
 	art_type = type
 	art_color = main
 	art_shade = shade
@@ -26,7 +24,7 @@
 		if("graffiti")
 			type = pick("amyjon","face","matt","revolution","engie","guy","end","dwarf","uboa")
 
-	update_icon()
+	. = ..(ml, new_age) // mapload, age
 
 /obj/effect/decal/cleanable/crayon/update_icon()
 	cut_overlays()
@@ -39,5 +37,7 @@
 
 		add_overlay(mainOverlay)
 		add_overlay(shadeOverlay)
+
+	add_janitor_hud_overlay()
 	return
 // CHOMPEdit End