Makes update_inv_head() respect item_state and item_icons

Fixes #9873

code/modules/clothing/head/misc_special.dm

@@ -138,21 +138,18 @@
 	desc = "A pair of kitty ears. Meow!"
 	icon_state = "kitty"
 	body_parts_covered = 0
-	var/icon/mob
-	var/icon/mob2
 	siemens_coefficient = 1.5
+	item_icons = list()
 
 	update_icon(var/mob/living/carbon/human/user)
 		if(!istype(user)) return
-		mob = new/icon("icon" = 'icons/mob/head.dmi', "icon_state" = "kitty")
+		var/icon/ears = new/icon("icon" = 'icons/mob/head.dmi', "icon_state" = "kitty")
-		mob2 = new/icon("icon" = 'icons/mob/head.dmi', "icon_state" = "kitty2")
+		ears.Blend(rgb(user.r_hair, user.g_hair, user.b_hair), ICON_ADD)
-		mob.Blend(rgb(user.r_hair, user.g_hair, user.b_hair), ICON_ADD)
-		mob2.Blend(rgb(user.r_hair, user.g_hair, user.b_hair), ICON_ADD)
 
 		var/icon/earbit = new/icon("icon" = 'icons/mob/head.dmi', "icon_state" = "kittyinner")
-		var/icon/earbit2 = new/icon("icon" = 'icons/mob/head.dmi', "icon_state" = "kittyinner2")
+		ears.Blend(earbit, ICON_OVERLAY)
-		mob.Blend(earbit, ICON_OVERLAY)
+		
-		mob2.Blend(earbit2, ICON_OVERLAY)
+		item_icons[icon_head] = ears
 
 /obj/item/clothing/head/richard
 	name = "chicken mask"

code/modules/mob/living/carbon/human/update_icons.dm

@@ -686,17 +686,24 @@ proc/get_damage_icon_part(damage_state, body_part)
 /mob/living/carbon/human/update_inv_head(var/update_icons=1)
 	if(head)
 		head.screen_loc = ui_head		//TODO
-		var/image/standing
+		
-		if(istype(head,/obj/item/clothing/head/kitty))
+		//Determine the icon to use
-			standing = image("icon" = head:mob)
+		var/t_icon = INV_HEAD_DEF_ICON
-		else
+		if(head.icon_override)
-			if(head.icon_override)
+			t_icon = head.icon_override
-				standing = image("icon" = head.icon_override, "icon_state" = "[head.icon_state]")
+		else if(head.sprite_sheets && head.sprite_sheets[species.name])
-			else if(head.sprite_sheets && head.sprite_sheets[species.name])
+			t_icon = head.sprite_sheets[species.name]
-				standing = image("icon" = head.sprite_sheets[species.name], "icon_state" = "[head.icon_state]")
+		else if(head.item_icons && (icon_head in head.item_icons))
-			else
+			t_icon = head.item_icons[icon_head]
-				standing = image("icon" = 'icons/mob/head.dmi', "icon_state" = "[head.icon_state]")
+		
-
+		//Determine the state to use
+		var/t_state = head.icon_state
+		if(head.item_state)
+			t_state = head.item_state
+		
+		//Create the image
+		var/image/standing = image(icon = t_icon, icon_state = t_state)
+		
 		if(head.blood_DNA)
 			var/image/bloodsies = image("icon" = 'icons/effects/blood.dmi', "icon_state" = "helmetblood")
 			bloodsies.color = head.blood_color

code/modules/mob/update_icons.dm

@@ -2,6 +2,7 @@
 //Having them here also makes for a nice reference list of the various overlay-updating procs available
 
 //default item on-mob icons
+#define INV_HEAD_DEF_ICON 'icons/mob/head.dmi'
 #define INV_L_HAND_DEF_ICON 'icons/mob/items/lefthand.dmi'
 #define INV_R_HAND_DEF_ICON 'icons/mob/items/righthand.dmi'
 

code/modules/paperwork/paper.dm

@@ -8,6 +8,7 @@
 	gender = PLURAL
 	icon = 'icons/obj/bureaucracy.dmi'
 	icon_state = "paper"
+	item_state = "paper"
 	throwforce = 0
 	w_class = 1.0
 	throw_range = 1

code/setup.dm

@@ -247,6 +247,7 @@
 // cannot be used as associative list keys.
 #define icon_l_hand		"slot_l_hand"
 #define icon_r_hand		"slot_r_hand"
+#define icon_head		"slot_head"
 
 // Bitflags for clothing parts.
 #define HEAD        1