Nukes get_modified_bleed_rate() and just use cached_bleed_rate instead (#92621)

## About The Pull Request

Port of my changes from [Monkestation/Monkestation2.0@`c54fc87`
(#7295)](c54fc872bf)

This nukes `/obj/item/bodypart/proc/get_modified_bleed_rate()`, instead
everything just uses the `cache_bleed_rate` var - `refresh_bleed_rate()`
will now take into account body position and grasping in the same way
`get_modified_bleed_rate` did.

(Un)grasping a limb already called `refresh_bleed_rate()` anyways, so
the only other change needed was making
`COMSIG_LIVING_SET_BODY_POSITION` also call it.

code/game/objects/items/stacks/medical.dm

@@ -273,7 +273,7 @@
 
 		var/datum/wound/burn/flesh/any_burn_wound = locate() in affecting.wounds
 		var/can_heal_burn_wounds = (flesh_regeneration || sanitization) && any_burn_wound?.can_be_ointmented_or_meshed()
-		var/can_suture_bleeding = stop_bleeding && affecting.get_modified_bleed_rate() > 0
+		var/can_suture_bleeding = stop_bleeding && affecting.cached_bleed_rate > 0
 		var/brute_to_heal = heal_brute && affecting.brute_dam > 0
 		var/burn_to_heal = heal_burn && affecting.burn_dam > 0
 
@@ -487,7 +487,7 @@
 		if(heal_end_sound)
 			playsound(patient, heal_end_sound, 75, TRUE, MEDIUM_RANGE_SOUND_EXTRARANGE)
 
-	if(limb.get_modified_bleed_rate())
+	if(limb.cached_bleed_rate)
 		add_mob_blood(patient)
 	limb.apply_gauze(src)
 

code/modules/mob/living/blood.dm

@@ -28,8 +28,7 @@
 	//Bloodloss from wounds
 	var/temp_bleed = 0
 	for(var/obj/item/bodypart/iter_part as anything in bodyparts)
-		var/iter_bleed_rate = iter_part.get_modified_bleed_rate()
-		temp_bleed += iter_bleed_rate * seconds_per_tick
+		temp_bleed += iter_part.cached_bleed_rate * seconds_per_tick
 
 		if(iter_part.generic_bleedstacks) // If you don't have any bleedstacks, don't try and heal them
 			iter_part.adjustBleedStacks(-1, 0)
@@ -145,7 +144,7 @@
 	var/bleed_amt = 0
 	for(var/X in bodyparts)
 		var/obj/item/bodypart/iter_bodypart = X
-		bleed_amt += iter_bodypart.get_modified_bleed_rate()
+		bleed_amt += iter_bodypart.cached_bleed_rate
 	return bleed_amt
 
 /mob/living/carbon/human/get_bleed_rate()

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

@@ -1141,14 +1141,14 @@
 /// if any of our bodyparts are bleeding
 /mob/living/carbon/proc/is_bleeding()
 	for(var/obj/item/bodypart/part as anything in bodyparts)
-		if(part.get_modified_bleed_rate())
+		if(part.cached_bleed_rate)
 			return TRUE
 
 /// get our total bleedrate
 /mob/living/carbon/proc/get_total_bleed_rate()
 	var/total_bleed_rate = 0
 	for(var/obj/item/bodypart/part as anything in bodyparts)
-		total_bleed_rate += part.get_modified_bleed_rate()
+		total_bleed_rate += part.cached_bleed_rate
 
 	return total_bleed_rate
 

code/modules/mob/living/carbon/carbon_context.dm

@@ -15,7 +15,7 @@
 	else if (human_user == src)
 		context[SCREENTIP_CONTEXT_LMB] = "Check injuries"
 
-		if (get_bodypart(human_user.zone_selected)?.get_modified_bleed_rate())
+		if (get_bodypart(human_user.zone_selected)?.cached_bleed_rate)
 			context[SCREENTIP_CONTEXT_CTRL_LMB] = "Grab limb"
 
 	if (human_user != src)

code/modules/mob/living/carbon/carbon_defense.dm

@@ -602,7 +602,7 @@
 		to_chat(src, span_danger("You can't grasp your [grasped_part.name] with itself!"))
 		return
 
-	var/bleed_rate = grasped_part.get_modified_bleed_rate()
+	var/bleed_rate = grasped_part.cached_bleed_rate
 	var/bleeding_text = (bleed_rate ? ", trying to stop the bleeding" : "")
 	to_chat(src, span_warning("You try grasping at your [grasped_part.name][bleeding_text]..."))
 	if(!do_after(src, 0.75 SECONDS))
@@ -618,7 +618,7 @@
 
 /// If TRUE, the owner of this bodypart can try grabbing it to slow bleeding, as well as various other effects.
 /obj/item/bodypart/proc/can_be_grasped()
-	if (get_modified_bleed_rate())
+	if (cached_bleed_rate)
 		return TRUE
 
 	for (var/datum/wound/iterated_wound as anything in wounds)
@@ -671,7 +671,7 @@
 	RegisterSignal(user, COMSIG_QDELETING, PROC_REF(qdel_void))
 	RegisterSignals(grasped_part, list(COMSIG_CARBON_REMOVE_LIMB, COMSIG_QDELETING), PROC_REF(qdel_void))
 
-	var/bleed_rate = grasped_part.get_modified_bleed_rate()
+	var/bleed_rate = grasped_part.cached_bleed_rate
 	var/bleeding_text = (bleed_rate ? ", trying to stop the bleeding" : "")
 	user.visible_message(span_danger("[user] grasps at [user.p_their()] [grasped_part.name][bleeding_text]."), span_notice("You grab hold of your [grasped_part.name] tightly."), vision_distance=COMBAT_MESSAGE_RANGE)
 	playsound(get_turf(src), 'sound/items/weapons/thudswoosh.ogg', 50, TRUE, -1)

code/modules/mob/living/carbon/examine.dm

@@ -161,7 +161,7 @@
 		var/list/obj/item/bodypart/grasped_limbs = list()
 
 		for(var/obj/item/bodypart/body_part as anything in bodyparts)
-			if(body_part.get_modified_bleed_rate())
+			if(body_part.cached_bleed_rate)
 				bleeding_limbs += body_part.plaintext_zone
 			if(body_part.grasped_by)
 				grasped_limbs += body_part.plaintext_zone

code/modules/surgery/bodyparts/_bodyparts.dm

@@ -390,7 +390,7 @@
 	if(current_gauze)
 		check_list += span_notice("\tThere is some [current_gauze.name] wrapped around it.")
 	else if(can_bleed())
-		switch(get_modified_bleed_rate())
+		switch(cached_bleed_rate)
 			if(0.2 to 1)
 				check_list += span_warning("\tIt's lightly bleeding.")
 			if(1 to 2)
@@ -821,7 +821,7 @@
 		SIGNAL_ADDTRAIT(TRAIT_NOBLOOD),
 		))
 
-	UnregisterSignal(old_owner, list(COMSIG_ATOM_RESTYLE, COMSIG_COMPONENT_CLEAN_ACT))
+	UnregisterSignal(old_owner, list(COMSIG_ATOM_RESTYLE, COMSIG_COMPONENT_CLEAN_ACT, COMSIG_LIVING_SET_BODY_POSITION))
 
 /// Apply ownership of a limb to someone, giving the appropriate traits, updates and signals
 /obj/item/bodypart/proc/apply_ownership(mob/living/carbon/new_owner)
@@ -851,6 +851,7 @@
 
 	RegisterSignal(owner, COMSIG_ATOM_RESTYLE, PROC_REF(on_attempt_feature_restyle_mob))
 	RegisterSignal(owner, COMSIG_COMPONENT_CLEAN_ACT, PROC_REF(on_owner_clean))
+	RegisterSignal(owner, COMSIG_LIVING_SET_BODY_POSITION, PROC_REF(refresh_bleed_rate))
 
 	forceMove(owner)
 	RegisterSignal(src, COMSIG_MOVABLE_MOVED, PROC_REF(on_forced_removal)) //this must be set after we moved, or we insta gib
@@ -1276,6 +1277,7 @@
 /// Refresh the cache of our rate of bleeding sans any modifiers
 /// ANYTHING ADDED TO THIS PROC NEEDS TO CALL IT WHEN ITS EFFECT CHANGES
 /obj/item/bodypart/proc/refresh_bleed_rate()
+	SIGNAL_HANDLER
 	SHOULD_NOT_OVERRIDE(TRUE)
 
 	var/old_bleed_rate = cached_bleed_rate
@@ -1298,21 +1300,18 @@
 	for(var/datum/wound/iter_wound as anything in wounds)
 		cached_bleed_rate += iter_wound.blood_flow
 
+	if(owner.body_position == LYING_DOWN)
+		cached_bleed_rate *= 0.75
+
+	if(grasped_by)
+		cached_bleed_rate *= 0.7
+
 	// Our bleed overlay is based directly off bleed_rate, so go aheead and update that would you?
 	if(cached_bleed_rate != old_bleed_rate)
 		update_part_wound_overlay()
 
 	return cached_bleed_rate
 
-/// Returns our bleed rate, taking into account laying down and grabbing the limb
-/obj/item/bodypart/proc/get_modified_bleed_rate()
-	var/bleed_rate = cached_bleed_rate
-	if(owner.body_position == LYING_DOWN)
-		bleed_rate *= 0.75
-	if(grasped_by)
-		bleed_rate *= 0.7
-	return bleed_rate
-
 /obj/item/bodypart/proc/update_part_wound_overlay()
 	if(!owner)
 		return FALSE