Burrower burrow changes and fixes

code/__DEFINES/traits.dm

@@ -179,6 +179,8 @@
 #define TRAIT_ABILITY_NO_PLASMA_TRANSFER "t_ability_no_plasma_transfer"
 /// Shows that the xeno queen is on ovi
 #define TRAIT_ABILITY_OVIPOSITOR "t_ability_ovipositor"
+/// Used for burrowed mobs, prevent's SG/sentrys/claymores from autofiring
+#define TRAIT_ABILITY_BURROWED "t_ability_burrowed"
 
 //-- item traits --
 // TOOL TRAITS
@@ -231,7 +233,8 @@ GLOBAL_LIST_INIT(mob_traits, list(
 	TRAIT_TWOBORE_TRAINING,
 	TRAIT_LEADERSHIP,
 	TRAIT_DEXTROUS,
-	TRAIT_REAGENT_SCANNER
+	TRAIT_REAGENT_SCANNER,
+	TRAIT_ABILITY_BURROWED
 ))
 
 /*

code/game/objects/items/explosives/mine.dm

@@ -198,6 +198,8 @@
 		return
 	if(L.get_target_lock(iff_signal) || isrobot(L))
 		return
+	if(HAS_TRAIT(L, TRAIT_ABILITY_BURROWED))
+		return
 	L.visible_message(SPAN_DANGER("[icon2html(src, viewers(src))] The [name] clicks as [L] moves in front of it."), \
 	SPAN_DANGER("[icon2html(src, L)] The [name] clicks as you move in front of it."), \
 	SPAN_DANGER("You hear a click."))

code/modules/defenses/sentry.dm

@@ -370,7 +370,7 @@
 				targets.Remove(A)
 				continue
 
-			if(M.get_target_lock(faction_group) || M.invisibility)
+			if(M.get_target_lock(faction_group) || M.invisibility || HAS_TRAIT(M, TRAIT_ABILITY_BURROWED))
 				if(M == target)
 					target = null
 				targets.Remove(M)

code/modules/mob/living/carbon/xenomorph/XenoAttacks.dm

@@ -93,6 +93,9 @@
 	if (M.fortify || M.burrow)
 		return XENO_NO_DELAY_ACTION
 
+	if(HAS_TRAIT(src, TRAIT_ABILITY_BURROWED))
+		return XENO_NO_DELAY_ACTION
+
 	if(islarva(M)) //Larvas can't eat people
 		M.visible_message(SPAN_DANGER("[M] nudges its head against \the [src]."), \
 		SPAN_DANGER("You nudge your head against \the [src]."), null, null, CHAT_TYPE_XENO_FLUFF)

code/modules/mob/living/carbon/xenomorph/Xenomorph.dm

@@ -745,6 +745,8 @@
 	if(SEND_SIGNAL(AM, COMSIG_MOVABLE_XENO_START_PULLING, src) & COMPONENT_ALLOW_PULL)
 		return do_pull(AM, lunge, no_msg)
 
+	if(burrow)
+		return
 	if(!isliving(AM))
 		return FALSE
 	var/mob/living/L = AM

code/modules/mob/living/carbon/xenomorph/abilities/burrower/burrower_powers.dm

@@ -42,7 +42,12 @@
 	density = FALSE
 	if(caste.fire_immunity == FIRE_IMMUNITY_NONE)
 		RegisterSignal(src, COMSIG_LIVING_PREIGNITION, PROC_REF(fire_immune))
-		RegisterSignal(src, COMSIG_LIVING_FLAMER_CROSSED, PROC_REF(flamer_crossed_immune))
+		RegisterSignal(src, list(
+				COMSIG_LIVING_FLAMER_CROSSED,
+				COMSIG_LIVING_FLAMER_FLAMED,
+		), PROC_REF(flamer_crossed_immune))
+	ADD_TRAIT(src, TRAIT_ABILITY_BURROWED, TRAIT_SOURCE_ABILITY("Burrow"))
+	playsound(src.loc, 'sound/effects/burrowing_b.ogg', 25)
 	update_canmove()
 	update_icons()
 	addtimer(CALLBACK(src, PROC_REF(do_burrow_cooldown)), (caste ? caste.burrow_cooldown : 5 SECONDS))
@@ -65,21 +70,29 @@
 	to_chat(src, SPAN_NOTICE("You resurface."))
 	burrow = FALSE
 	if(caste.fire_immunity == FIRE_IMMUNITY_NONE)
-		UnregisterSignal(src, COMSIG_LIVING_PREIGNITION)
-		UnregisterSignal(src, COMSIG_LIVING_FLAMER_CROSSED)
+		UnregisterSignal(src, list(
+				COMSIG_LIVING_PREIGNITION,
+				COMSIG_LIVING_FLAMER_CROSSED,
+				COMSIG_LIVING_FLAMER_FLAMED,
+		))
+	REMOVE_TRAIT(src, TRAIT_ABILITY_BURROWED, TRAIT_SOURCE_ABILITY("Burrow"))
 	frozen = FALSE
 	invisibility = FALSE
 	anchored = FALSE
 	density = TRUE
-	for(var/mob/living/carbon/human/H in loc)
-		H.apply_effect(2, WEAKEN)
+	playsound(loc, 'sound/effects/burrowoff.ogg', 25)
+	for(var/mob/living/carbon/mob in loc)
+		if(!can_not_harm(mob))
+			mob.apply_effect(2, WEAKEN)
+
 	addtimer(CALLBACK(src, PROC_REF(do_burrow_cooldown)), (caste ? caste.burrow_cooldown : 5 SECONDS))
 	update_canmove()
 	update_icons()
 
 /mob/living/carbon/xenomorph/proc/do_burrow_cooldown()
 	used_burrow = FALSE
-	to_chat(src, SPAN_NOTICE("You can now surface."))
+	if(burrow)
+		to_chat(src, SPAN_NOTICE("You can now surface."))
 	for(var/X in actions)
 		var/datum/action/act = X
 		act.update_button_icon()

code/modules/mob/living/living_verbs.dm

@@ -11,6 +11,12 @@
 		to_chat(src, SPAN_WARNING("You can't resist in your current state."))
 		return
 
+	if(isxeno(src))
+		var/mob/living/carbon/xenomorph/xeno = src
+		if(xeno.burrow)
+			to_chat(src, SPAN_WARNING("You can't resist in your current state."))
+			return
+
 	resisting = TRUE
 
 	next_move = world.time + 20