Port of Hover Inventory and Body Zone Hover Indicators.

The body zone selector now indicates which body part you are about to select when hovered over, and the hover inventory indicator basically shows where you are trying to put an item, and then shows an item ghost in red or green, giving visual feedback as to if that item will go in the slot or not.

Gifs of this in action:
![https://i.imgur.com/MTi7Kpn.gif](https://i.imgur.com/MTi7Kpn.gif) 
Body Selection parts.

![https://i.imgur.com/KbLqWKy.gif](https://i.imgur.com/KbLqWKy.gif) 
Inventory Icon Overlays!

Credit goes to @ShadowLarkens for original port to Paradise and assistance with port to Virgo. Downstream port of https://github.com/VOREStation/VOREStation/pull/7748

- A note on `code/game/objects/items/weapons/storage/internal.dm`, VSCode automatically corrected the line endings, hence the massive filediff. The only practical changes are the addition of `disable_warning = 0`

code/_onclick/hud/human.dm

@@ -28,6 +28,7 @@
 		inv_box.icon = ui_style
 		inv_box.color = ui_color
 		inv_box.alpha = ui_alpha
+		inv_box.hud = src
 
 		var/list/slot_data =  hud_data.gear[gear_slot]
 		inv_box.name =        gear_slot
@@ -192,6 +193,7 @@
 		using.screen_loc = ui_swaphand1
 		using.color = ui_color
 		using.alpha = ui_alpha
+		using.hud = src
 		src.adding += using
 
 		using = new /obj/screen/inventory()
@@ -201,6 +203,7 @@
 		using.screen_loc = ui_swaphand2
 		using.color = ui_color
 		using.alpha = ui_alpha
+		using.hud = src
 		src.adding += using
 
 	if(hud_data.has_resist)

code/_onclick/hud/screen_objects.dm

@@ -31,7 +31,36 @@
 
 /obj/screen/inventory
 	var/slot_id	//The indentifier for the slot. It has nothing to do with ID cards.
+	var/list/object_overlays = list() // Required for inventory/screen overlays.
 
+/obj/screen/inventory/MouseEntered()
+	..()
+	add_overlays()
+
+/obj/screen/inventory/MouseExited()
+	..()
+	cut_overlay(object_overlays)
+	object_overlays.Cut()
+
+/obj/screen/inventory/proc/add_overlays()
+	var/mob/user = hud.mymob
+
+	if(hud && user && slot_id)
+		var/obj/item/holding = user.get_active_hand()
+
+		if(!holding || user.get_equipped_item(slot_id))
+			return
+
+		var/image/item_overlay = image(holding)
+		item_overlay.alpha = 92
+
+		if(!holding.mob_can_equip(user, slot_id, disable_warning = TRUE))
+			item_overlay.color = "#ff0000"
+		else
+			item_overlay.color = "#00ff00"
+
+		object_overlays += item_overlay
+		add_overlay(object_overlays)
 
 /obj/screen/close
 	name = "close"
@@ -102,78 +131,116 @@
 	icon_state = "zone_sel"
 	screen_loc = ui_zonesel
 	var/selecting = BP_TORSO
+	var/static/list/hover_overlays_cache = list()
+	var/hovering_choice
+	var/mutable_appearance/selecting_appearance
 
 /obj/screen/zone_sel/Click(location, control,params)
+	if(isobserver(usr))
+		return
+
 	var/list/PL = params2list(params)
 	var/icon_x = text2num(PL["icon-x"])
 	var/icon_y = text2num(PL["icon-y"])
-	var/old_selecting = selecting //We're only going to update_icon() if there's been a change
+	var/choice = get_zone_at(icon_x, icon_y)
+	if(!choice)
+		return 1
 
+	return set_selected_zone(choice, usr)
+
+/obj/screen/zone_sel/MouseEntered(location, control, params)
+	MouseMove(location, control, params)
+
+/obj/screen/zone_sel/MouseMove(location, control, params)
+	if(isobserver(usr))
+		return
+
+	var/list/PL = params2list(params)
+	var/icon_x = text2num(PL["icon-x"])
+	var/icon_y = text2num(PL["icon-y"])
+	var/choice = get_zone_at(icon_x, icon_y)
+
+	if(hovering_choice == choice)
+		return
+	vis_contents -= hover_overlays_cache[hovering_choice]
+	hovering_choice = choice
+
+	var/obj/effect/overlay/zone_sel/overlay_object = hover_overlays_cache[choice]
+	if(!overlay_object)
+		overlay_object = new
+		overlay_object.icon_state = "[choice]"
+		hover_overlays_cache[choice] = overlay_object
+	vis_contents += overlay_object
+
+
+/obj/effect/overlay/zone_sel
+	icon = 'icons/mob/zone_sel.dmi'
+	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
+	alpha = 128
+	anchored = TRUE
+	layer = LAYER_HUD_ABOVE
+	plane = PLANE_PLAYER_HUD_ABOVE
+
+/obj/screen/zone_sel/MouseExited(location, control, params)
+	if(!isobserver(usr) && hovering_choice)
+		vis_contents -= hover_overlays_cache[hovering_choice]
+		hovering_choice = null
+
+/obj/screen/zone_sel/proc/get_zone_at(icon_x, icon_y)
 	switch(icon_y)
 		if(1 to 3) //Feet
 			switch(icon_x)
 				if(10 to 15)
-					selecting = BP_R_FOOT
+					return BP_R_FOOT
 				if(17 to 22)
-					selecting = BP_L_FOOT
-				else
-					return 1
+					return BP_L_FOOT
 		if(4 to 9) //Legs
 			switch(icon_x)
 				if(10 to 15)
-					selecting = BP_R_LEG
+					return BP_R_LEG
 				if(17 to 22)
-					selecting = BP_L_LEG
-				else
-					return 1
+					return BP_L_LEG
 		if(10 to 13) //Hands and groin
 			switch(icon_x)
 				if(8 to 11)
-					selecting = BP_R_HAND
+					return BP_R_HAND
 				if(12 to 20)
-					selecting = BP_GROIN
+					return BP_GROIN
 				if(21 to 24)
-					selecting = BP_L_HAND
-				else
-					return 1
+					return BP_L_HAND
 		if(14 to 22) //Chest and arms to shoulders
 			switch(icon_x)
 				if(8 to 11)
-					selecting = BP_R_ARM
+					return BP_R_ARM
 				if(12 to 20)
-					selecting = BP_TORSO
+					return BP_TORSO
 				if(21 to 24)
-					selecting = BP_L_ARM
-				else
-					return 1
+					return BP_L_ARM
 		if(23 to 30) //Head, but we need to check for eye or mouth
 			if(icon_x in 12 to 20)
-				selecting = BP_HEAD
 				switch(icon_y)
 					if(23 to 24)
 						if(icon_x in 15 to 17)
-							selecting = O_MOUTH
+							return O_MOUTH
 					if(26) //Eyeline, eyes are on 15 and 17
 						if(icon_x in 14 to 18)
-							selecting = O_EYES
+							return O_EYES
 					if(25 to 27)
 						if(icon_x in 15 to 17)
-							selecting = O_EYES
+							return O_EYES
+				return BP_HEAD
 
-	if(old_selecting != selecting)
-		update_icon()
-	return 1
-
-/obj/screen/zone_sel/proc/set_selected_zone(bodypart)
-	var/old_selecting = selecting
-	selecting = bodypart
-	if(old_selecting != selecting)
+/obj/screen/zone_sel/proc/set_selected_zone(choice, mob/user)
+	if(isobserver(user))
+		return
+	if(choice != selecting)
+		selecting = choice
 		update_icon()
 
 /obj/screen/zone_sel/update_icon()
-	overlays.Cut()
-	overlays += image('icons/mob/zone_sel.dmi', "[selecting]")
-
+	cut_overlay(selecting_appearance)
+	selecting_appearance = mutable_appearance('icons/mob/zone_sel.dmi', "[selecting]")
+	add_overlay(selecting_appearance)
 
 /obj/screen/Click(location, control, params)
 	if(!usr)	return 1

code/game/objects/items/weapons/storage/internal.dm

@@ -1,90 +1,90 @@
-//A storage item intended to be used by other items to provide storage functionality.
-//Types that use this should consider overriding emp_act() and hear_talk(), unless they shield their contents somehow.
-/obj/item/weapon/storage/internal
-	preserve_item = 1
-	var/obj/item/master_item
-
-/obj/item/weapon/storage/internal/New(obj/item/MI)
-	master_item = MI
-	loc = master_item
-	//name = master_item.name //VOREStation Removal
-	verbs -= /obj/item/verb/verb_pickup	//make sure this is never picked up.
-	..()
-
-/obj/item/weapon/storage/internal/Destroy()
-	master_item = null
-	. = ..()
-
-/obj/item/weapon/storage/internal/attack_hand()
-	return		//make sure this is never picked up
-
-/obj/item/weapon/storage/internal/mob_can_equip()
-	return 0	//make sure this is never picked up
-
-//Helper procs to cleanly implement internal storages - storage items that provide inventory slots for other items.
-//These procs are completely optional, it is up to the master item to decide when it's storage get's opened by calling open()
-//However they are helpful for allowing the master item to pretend it is a storage item itself.
-//If you are using these you will probably want to override attackby() as well.
-//See /obj/item/clothing/suit/storage for an example.
-
-//items that use internal storage have the option of calling this to emulate default storage MouseDrop behaviour.
-//returns 1 if the master item's parent's MouseDrop() should be called, 0 otherwise. It's strange, but no other way of
-//doing it without the ability to call another proc's parent, really.
-/obj/item/weapon/storage/internal/proc/handle_mousedrop(mob/user as mob, obj/over_object as obj)
-	if (ishuman(user) || issmall(user)) //so monkeys can take off their backpacks -- Urist
-
-		if (istype(user.loc,/obj/mecha)) // stops inventory actions in a mech
-			return 0
-
-		if(over_object == user && Adjacent(user)) // this must come before the screen objects only block
-			src.open(user)
-			return 0
-
-		if (!( istype(over_object, /obj/screen) ))
-			return 1
-
-		//makes sure master_item is equipped before putting it in hand, so that we can't drag it into our hand from miles away.
-		//there's got to be a better way of doing this...
-		if (!(master_item.loc == user) || (master_item.loc && master_item.loc.loc == user))
-			return 0
-
-		if (!( user.restrained() ) && !( user.stat ))
-			switch(over_object.name)
-				if("r_hand")
-					user.unEquip(master_item)
-					user.put_in_r_hand(master_item)
-				if("l_hand")
-					user.unEquip(master_item)
-					user.put_in_l_hand(master_item)
-			master_item.add_fingerprint(user)
-			return 0
-	return 0
-
-//items that use internal storage have the option of calling this to emulate default storage attack_hand behaviour.
-//returns 1 if the master item's parent's attack_hand() should be called, 0 otherwise.
-//It's strange, but no other way of doing it without the ability to call another proc's parent, really.
-/obj/item/weapon/storage/internal/proc/handle_attack_hand(mob/user as mob)
-
-	if(ishuman(user))
-		var/mob/living/carbon/human/H = user
-		if(H.l_store == master_item && !H.get_active_hand())	//Prevents opening if it's in a pocket.
-			H.put_in_hands(master_item)
-			H.l_store = null
-			return 0
-		if(H.r_store == master_item && !H.get_active_hand())
-			H.put_in_hands(master_item)
-			H.r_store = null
-			return 0
-
-	src.add_fingerprint(user)
-	if (master_item.loc == user)
-		src.open(user)
-		return 0
-
-	for(var/mob/M in range(1, master_item.loc))
-		if (M.s_active == src)
-			src.close(M)
-	return 1
-
-/obj/item/weapon/storage/internal/Adjacent(var/atom/neighbor)
-	return master_item.Adjacent(neighbor)
+//A storage item intended to be used by other items to provide storage functionality.
+//Types that use this should consider overriding emp_act() and hear_talk(), unless they shield their contents somehow.
+/obj/item/weapon/storage/internal
+	preserve_item = 1
+	var/obj/item/master_item
+
+/obj/item/weapon/storage/internal/New(obj/item/MI)
+	master_item = MI
+	loc = master_item
+	//name = master_item.name //VOREStation Removal
+	verbs -= /obj/item/verb/verb_pickup	//make sure this is never picked up.
+	..()
+
+/obj/item/weapon/storage/internal/Destroy()
+	master_item = null
+	. = ..()
+
+/obj/item/weapon/storage/internal/attack_hand()
+	return		//make sure this is never picked up
+
+/obj/item/weapon/storage/internal/mob_can_equip(M as mob, slot, disable_warning = 0)
+	return 0	//make sure this is never picked up
+
+//Helper procs to cleanly implement internal storages - storage items that provide inventory slots for other items.
+//These procs are completely optional, it is up to the master item to decide when it's storage get's opened by calling open()
+//However they are helpful for allowing the master item to pretend it is a storage item itself.
+//If you are using these you will probably want to override attackby() as well.
+//See /obj/item/clothing/suit/storage for an example.
+
+//items that use internal storage have the option of calling this to emulate default storage MouseDrop behaviour.
+//returns 1 if the master item's parent's MouseDrop() should be called, 0 otherwise. It's strange, but no other way of
+//doing it without the ability to call another proc's parent, really.
+/obj/item/weapon/storage/internal/proc/handle_mousedrop(mob/user as mob, obj/over_object as obj)
+	if (ishuman(user) || issmall(user)) //so monkeys can take off their backpacks -- Urist
+
+		if (istype(user.loc,/obj/mecha)) // stops inventory actions in a mech
+			return 0
+
+		if(over_object == user && Adjacent(user)) // this must come before the screen objects only block
+			src.open(user)
+			return 0
+
+		if (!( istype(over_object, /obj/screen) ))
+			return 1
+
+		//makes sure master_item is equipped before putting it in hand, so that we can't drag it into our hand from miles away.
+		//there's got to be a better way of doing this...
+		if (!(master_item.loc == user) || (master_item.loc && master_item.loc.loc == user))
+			return 0
+
+		if (!( user.restrained() ) && !( user.stat ))
+			switch(over_object.name)
+				if("r_hand")
+					user.unEquip(master_item)
+					user.put_in_r_hand(master_item)
+				if("l_hand")
+					user.unEquip(master_item)
+					user.put_in_l_hand(master_item)
+			master_item.add_fingerprint(user)
+			return 0
+	return 0
+
+//items that use internal storage have the option of calling this to emulate default storage attack_hand behaviour.
+//returns 1 if the master item's parent's attack_hand() should be called, 0 otherwise.
+//It's strange, but no other way of doing it without the ability to call another proc's parent, really.
+/obj/item/weapon/storage/internal/proc/handle_attack_hand(mob/user as mob)
+
+	if(ishuman(user))
+		var/mob/living/carbon/human/H = user
+		if(H.l_store == master_item && !H.get_active_hand())	//Prevents opening if it's in a pocket.
+			H.put_in_hands(master_item)
+			H.l_store = null
+			return 0
+		if(H.r_store == master_item && !H.get_active_hand())
+			H.put_in_hands(master_item)
+			H.r_store = null
+			return 0
+
+	src.add_fingerprint(user)
+	if (master_item.loc == user)
+		src.open(user)
+		return 0
+
+	for(var/mob/M in range(1, master_item.loc))
+		if (M.s_active == src)
+			src.close(M)
+	return 1
+
+/obj/item/weapon/storage/internal/Adjacent(var/atom/neighbor)
+	return master_item.Adjacent(neighbor)

code/modules/clothing/clothing.dm

@@ -59,7 +59,7 @@
 		user.recalculate_vis()
 
 //BS12: Species-restricted clothing check.
-/obj/item/clothing/mob_can_equip(M as mob, slot)
+/obj/item/clothing/mob_can_equip(M as mob, slot, disable_warning = 0)
 
 	//if we can't equip the item anyway, don't bother with species_restricted (cuts down on spam)
 	if (!..())

code/modules/clothing/gloves/arm_guards.dm

@@ -7,7 +7,7 @@
 	w_class = ITEMSIZE_NORMAL
 	drop_sound = 'sound/items/drop/metalshield.ogg'
 
-/obj/item/clothing/gloves/arm_guard/mob_can_equip(var/mob/living/carbon/human/H, slot)
+/obj/item/clothing/gloves/arm_guard/mob_can_equip(var/mob/living/carbon/human/H, slot, disable_warning = 0)
 	if(..()) //This will only run if no other problems occured when equiping.
 		if(H.wear_suit)
 			if(H.wear_suit.body_parts_covered & ARMS)

code/modules/clothing/gloves/gauntlets.dm

@@ -14,7 +14,7 @@
 	punch_force = 5
 	var/obj/item/clothing/gloves/gloves = null	//Undergloves
 
-/obj/item/clothing/gloves/gauntlets/mob_can_equip(mob/user)
+/obj/item/clothing/gloves/gauntlets/mob_can_equip(mob/user, slot, disable_warning = 0)
 	var/mob/living/carbon/human/H = user
 	if(H.gloves)
 		gloves = H.gloves

code/modules/clothing/masks/monitor.dm

@@ -33,7 +33,7 @@
 	canremove = 1
 	return ..()
 
-/obj/item/clothing/mask/monitor/mob_can_equip(var/mob/living/carbon/human/user, var/slot)
+/obj/item/clothing/mask/monitor/mob_can_equip(var/mob/living/carbon/human/user, var/slot, disable_warning = FALSE)
 	if (!..())
 		return 0
 	if(istype(user))

code/modules/clothing/shoes/magboots.dm

@@ -42,7 +42,7 @@
 	user.update_inv_shoes()	//so our mob-overlays update
 	user.update_action_buttons()
 
-/obj/item/clothing/shoes/magboots/mob_can_equip(mob/user, slot)
+/obj/item/clothing/shoes/magboots/mob_can_equip(mob/user, slot, disable_warning = FALSE)
 	var/mob/living/carbon/human/H = user
 
 	if(H.shoes)

code/modules/clothing/suits/armor.dm

@@ -520,7 +520,7 @@
 		|ACCESSORY_SLOT_ARMOR_M)
 	blood_overlay_type = "armor"
 
-/obj/item/clothing/suit/armor/pcarrier/mob_can_equip(var/mob/living/carbon/human/H, slot)
+/obj/item/clothing/suit/armor/pcarrier/mob_can_equip(var/mob/living/carbon/human/H, slot, disable_warning = FALSE)
 	if(..()) //This will only run if no other problems occured when equiping.
 		if(H.gloves)
 			if(H.gloves.body_parts_covered & ARMS)

code/modules/vore/fluffstuff/custom_clothes_vr.dm

@@ -1887,7 +1887,7 @@ Departamental Swimsuits, for general use
 
 	species_restricted = list("exclude", SPECIES_TESHARI)
 
-/obj/item/clothing/under/fluff/slime_skeleton/mob_can_equip(M as mob, slot)
+/obj/item/clothing/under/fluff/slime_skeleton/mob_can_equip(M as mob, slot, disable_warning = FALSE)
 	if(!..())
 		return 0