Adds a HUD for borers (#2211)

Borers with minds are added to the HUD and can see the HUD.
Humans with a borer are added to the HUD, but CANNOT see the HUD.
If the borer leaves, the human is removed from the HUD.

code/__DEFINES/atom_hud.dm

@@ -40,6 +40,7 @@
 #define ANTAG_HUD_SINTOUCHED	16
 #define ANTAG_HUD_SOULLESS		17
 #define ANTAG_HUD_CLOCKWORK		18
+#define ANTAG_HUD_BORER			19
 
 // Notification action types
 #define NOTIFY_JUMP "jump"

code/datums/hud.dm

@@ -20,6 +20,7 @@ GLOBAL_LIST_INIT(huds, list(
 	ANTAG_HUD_SINTOUCHED = new/datum/atom_hud/antag/hidden(),
 	ANTAG_HUD_SOULLESS = new/datum/atom_hud/antag/hidden(),
 	ANTAG_HUD_CLOCKWORK = new/datum/atom_hud/antag(),
+	ANTAG_HUD_BORER = new/datum/atom_hud/antag(),
 	))
 
 /datum/atom_hud

code/game/gamemodes/antag_spawner_cit.dm

@@ -27,7 +27,7 @@ obj/item/weapon/antag_spawner/syndi_borer/spawn_antag(client/C, turf/T, mob/owne
 		to_chat(B, "<B>You are awake at last! Seek out whoever released you and aid them as best you can!</B>")
 		if(new_objective)
 			to_chat(B, "<B>Objective #[1]</B>: [new_objective.explanation_text]")
-
+		SSticker.mode.update_borer_icons_added(B)
 /obj/item/weapon/antag_spawner/syndi_borer/proc/check_usability(mob/user)
 	if(used)
 		to_chat(user, "<span class='warning'>[src] appears to be empty!</span>")

code/game/gamemodes/miniantags/borer/borer.dm

@@ -413,6 +413,8 @@ GLOBAL_VAR_INIT(total_borer_hosts_needed, 10)
 	victim = C
 	forceMove(victim)
 
+	SSticker.mode.update_borer_icons_added_host(victim.mind)
+
 	RemoveBorerActions()
 	GrantInfestActions()
 
@@ -587,6 +589,7 @@ GLOBAL_VAR_INIT(total_borer_hosts_needed, 10)
 	var/mob/living/V = victim
 	V.verbs -= /mob/living/proc/borer_comm
 	talk_to_borer_action.Remove(victim)
+	SSticker.mode.update_borer_icons_removed_host(victim.mind)
 	victim = null
 	return
 
@@ -842,6 +845,7 @@ GLOBAL_VAR_INIT(total_borer_hosts_needed, 10)
 
 		if(mind)
 			mind.store_memory("You must escape with at least [GLOB.total_borer_hosts_needed] borers with hosts on the shuttle.")
+			SSticker.mode.update_borer_icons_added(mind)
 
 		to_chat(src, "<span class='notice'>You are a cortical borer!</span>")
 		to_chat(src, "You are a brain slug that worms its way into the head of its victim. Use stealth, persuasion and your powers of mind control to keep you, your host and your eventual spawn safe and warm.")
@@ -1075,4 +1079,28 @@ GLOBAL_VAR_INIT(total_borer_hosts_needed, 10)
 
 /datum/action/innate/borer/jumpstart_host/Activate()
 	var/mob/living/simple_animal/borer/B = owner
-	B.jumpstart()
+	B.jumpstart()
+
+
+//HUD STUFF
+/datum/game_mode/proc/update_borer_icons_added(datum/mind/borer_mind)
+	var/datum/atom_hud/antag/borerhud = GLOB.huds[ANTAG_HUD_BORER]
+	borerhud.join_hud(borer_mind.current)
+	set_antag_hud(borer_mind.current, "hudbrainworm")
+
+/datum/game_mode/proc/update_borer_icons_removed(datum/mind/borer_mind)
+	var/datum/atom_hud/antag/borerhud = GLOB.huds[ANTAG_HUD_BORER]
+	borerhud.leave_hud(borer_mind.current)
+	set_antag_hud(borer_mind.current, null)
+
+/datum/game_mode/proc/update_borer_icons_added_host(datum/mind/host_mind)
+	var/datum/atom_hud/antag/hosthud = GLOB.huds[ANTAG_HUD_BORER] //Invisible to self
+	hosthud.self_visible = FALSE
+	hosthud.join_hud(host_mind.current)
+	set_antag_hud(host_mind.current, "hudbrainworm")
+
+/datum/game_mode/proc/update_borer_icons_removed_host(datum/mind/host_mind)
+	var/datum/atom_hud/antag/hosthud = GLOB.huds[ANTAG_HUD_BORER] //Invisible to self
+	hosthud.self_visible = FALSE //Probably not needed as we're deleting?
+	hosthud.leave_hud(host_mind.current)
+	set_antag_hud(host_mind.current, null)