Fixes a bunch of stuff breaking digitigrade legs (#22555)

Author: SapphicOverload

code/modules/clothing/suits/_suits.dm

@@ -55,7 +55,7 @@
 	if(adjusted)
 		adjusted = FALSE
 
-	if(!(mutantrace_variation & DIGITIGRADE_VARIATION) && ishuman(user))
+	if(!(mutantrace_variation & DIGITIGRADE_VARIATION) && (flags_inv & HIDEJUMPSUIT) && ishuman(user))
 		if(slot_flags & slot)
 			ADD_TRAIT(user, TRAIT_DIGI_SQUISH, REF(src))
 		else
@@ -66,7 +66,7 @@
 		human_user.update_body_parts()
 
 /obj/item/clothing/suit/dropped(mob/user)
-	if(!(mutantrace_variation & DIGITIGRADE_VARIATION) && ishuman(user))
+	if(!(mutantrace_variation & DIGITIGRADE_VARIATION) && (flags_inv & HIDEJUMPSUIT) && ishuman(user))
 		REMOVE_TRAIT(user, TRAIT_DIGI_SQUISH, REF(src))
 		var/mob/living/carbon/human/human_user = user
 		human_user.update_inv_w_uniform()

code/modules/clothing/under/_under.dm

@@ -103,7 +103,7 @@
 		return
 	var/update_suit = FALSE
 	var/mob/living/carbon/human/human_user = user
-	if(!(mutantrace_variation & DIGITIGRADE_VARIATION))
+	if(!(mutantrace_variation & DIGITIGRADE_VARIATION) && (body_parts_covered & LEGS))
 		if(slot_flags & slot)
 			ADD_TRAIT(user, TRAIT_DIGI_SQUISH, REF(src))
 		else
@@ -126,7 +126,7 @@
 	if(ishuman(user))
 		var/update_suit = FALSE
 		var/mob/living/carbon/human/human_user = user
-		if(!(mutantrace_variation & DIGITIGRADE_VARIATION))
+		if(!(mutantrace_variation & DIGITIGRADE_VARIATION) && (body_parts_covered & LEGS))
 			REMOVE_TRAIT(user, TRAIT_DIGI_SQUISH, REF(src))
 			human_user.update_inv_shoes()
 			human_user.update_body_parts()

code/modules/surgery/bodyparts/_bodyparts.dm

@@ -736,7 +736,15 @@
 		set_disabled(FALSE)
 
 /obj/item/bodypart/proc/set_digitigrade(use_digi = FALSE)
-	return
+	if(use_digitigrade == use_digi)
+		return
+	use_digitigrade = use_digi
+	if(!owner)
+		return
+	if(use_digi)
+		ADD_TRAIT(owner, TRAIT_DIGITIGRADE, REF(src))
+	else
+		REMOVE_TRAIT(owner, TRAIT_DIGITIGRADE, REF(src))
 
 ///Called when TRAIT_PARALYSIS is added to the limb.
 /obj/item/bodypart/proc/on_paralysis_trait_gain(obj/item/bodypart/source)

code/modules/surgery/bodyparts/dismemberment.dm

@@ -97,7 +97,7 @@
 		LAZYREMOVE(owner.all_scars, S)
 
 	var/mob/living/carbon/phantom_owner = owner // so we can still refer to the guy who lost their limb after said limb forgets 'em
-	owner = null
+	set_owner(null)
 
 	for(var/X in phantom_owner.surgeries) //if we had an ongoing surgery on that limb, we stop it.
 		var/datum/surgery/S = X

code/modules/surgery/bodyparts/parts.dm

@@ -262,9 +262,6 @@
 	/// Used by the bloodysoles component to make footprints
 	var/footprint_sprite = FOOTPRINT_SPRITE_SHOES
 
-/obj/item/bodypart/l_leg/set_digitigrade(use_digi)
-	use_digitigrade = use_digi
-
 /obj/item/bodypart/l_leg/set_owner(new_owner)
 	. = ..()
 	if(. == FALSE)
@@ -357,9 +354,6 @@
 	/// Used by the bloodysoles component to make footprints
 	var/footprint_sprite = FOOTPRINT_SPRITE_SHOES
 
-/obj/item/bodypart/r_leg/set_digitigrade(use_digi)
-	use_digitigrade = use_digi
-
 /obj/item/bodypart/r_leg/set_owner(new_owner)
 	. = ..()
 	if(. == FALSE)

code/modules/surgery/bodyparts/robot_bodyparts.dm

@@ -174,12 +174,12 @@
 	set_digitigrade(!use_digitigrade)
 
 /obj/item/bodypart/l_leg/robot/set_digitigrade(use_digi = FALSE)
-	use_digitigrade = use_digi
 	if(use_digi)
 		icon_state = digi_icon_state
 	else
 		icon_state = initial(icon_state)
 	update_icon()
+	return ..()
 
 /obj/item/bodypart/r_leg/robot/attackby(obj/item/W, mob/user, params)
 	if(W.tool_behaviour != TOOL_SCREWDRIVER)
@@ -188,12 +188,12 @@
 	set_digitigrade(!use_digitigrade)
 
 /obj/item/bodypart/r_leg/robot/set_digitigrade(use_digi = FALSE)
-	use_digitigrade = use_digi
 	if(use_digi)
 		icon_state = digi_icon_state
 	else
 		icon_state = initial(icon_state)
 	update_icon()
+	return ..()
 
 /obj/item/bodypart/chest/robot
 	name = "cyborg torso"