Mouse drop refactor (#20256)

Refactored mousedrag procs, added signals, some safeguards, did some
cleanups around, renamed them to make a little more sense. Mostly put in
line with TG's code.
Fast clicking and releasing with a drag, depending on the grace period
and how fast it is done, can be counted as clicks, to aid in combat
scenarios where you spamclick.

code/modules/vehicles/animal.dm

@@ -54,20 +54,20 @@
 		return FALSE
 	return ..(M)
 
-/obj/vehicle/animal/MouseDrop(atom/over)
-	if(use_check_and_message(usr))
-		return
-
-	if(usr == over && ishuman(over))
-		var/mob/living/carbon/human/H = over
-		storage_compartment.open(H)
-
-/obj/vehicle/animal/MouseDrop_T(atom/dropping, mob/user)
+/obj/vehicle/animal/mouse_drop_dragged(atom/over, mob/user, src_location, over_location, params)
 	if(use_check_and_message(user))
 		return
 
-	if(!load(dropping))
-		to_chat(user, SPAN_WARNING("You were unable to load \the [dropping] onto \the [src]."))
+	if(user == over && ishuman(over))
+		var/mob/living/carbon/human/H = over
+		storage_compartment.open(H)
+
+/obj/vehicle/animal/mouse_drop_receive(atom/dropped, mob/user, params)
+	if(use_check_and_message(user))
+		return
+
+	if(!load(dropped))
+		to_chat(user, SPAN_WARNING("You were unable to load \the [dropped] onto \the [src]."))
 		return
 
 /obj/vehicle/animal/attack_hand(var/mob/user as mob)

code/modules/vehicles/bike.dm

@@ -151,14 +151,14 @@
 		return 0
 	return ..(M)
 
-/obj/vehicle/bike/MouseDrop(atom/over)
-	if(usr == over && ishuman(over))
+/obj/vehicle/bike/mouse_drop_dragged(atom/over, mob/user, src_location, over_location, params)
+	if(user == over && ishuman(over))
 		var/mob/living/carbon/human/H = over
 		storage_compartment.open(H)
 
-/obj/vehicle/bike/MouseDrop_T(atom/dropping, mob/user)
-	if(!load(dropping))
-		to_chat(user, SPAN_WARNING("You were unable to load \the [dropping] onto \the [src]."))
+/obj/vehicle/bike/mouse_drop_receive(atom/dropped, mob/user, params)
+	if(!load(dropped))
+		to_chat(user, SPAN_WARNING("You were unable to load \the [dropped] onto \the [src]."))
 		return
 
 /obj/vehicle/bike/attack_hand(var/mob/user as mob)

code/modules/vehicles/droppod.dm

@@ -32,10 +32,10 @@
 	desc = "A high-tech titanium pod, capable of transporting its passenger right into the action at considerable ranges. The metal foam dispensers lining the top prevent most hull breaches on station ingress."
 	icon_state = "syndie_pod"
 
-/obj/vehicle/droppod/MouseDrop()
+/obj/vehicle/droppod/mouse_drop_dragged(atom/over, mob/user, src_location, over_location, params)
 	return
 
-/obj/vehicle/droppod/MouseDrop_T()
+/obj/vehicle/droppod/mouse_drop_receive(atom/dropped, mob/user, params)
 	return
 
 /obj/vehicle/droppod/emag_act()

code/modules/vehicles/train.dm

@@ -84,14 +84,14 @@
 // Interaction procs
 //-------------------------------------------
 
-/obj/vehicle/train/MouseDrop_T(atom/dropping, mob/user)
+/obj/vehicle/train/mouse_drop_receive(atom/dropped, mob/user, params)
 	if(use_check_and_message(user))
 		return
-	if(istype(dropping, /obj/vehicle/train))
-		latch(dropping, user)
+	if(istype(dropped, /obj/vehicle/train))
+		latch(dropped, user)
 	else
-		if(!load(dropping))
-			to_chat(user, SPAN_WARNING("You were unable to load \the [dropping] on \the [src]."))
+		if(!load(dropped))
+			to_chat(user, SPAN_WARNING("You were unable to load \the [dropped] on \the [src]."))
 
 /obj/vehicle/train/attack_hand(mob/user as mob)
 	if(use_check_and_message(user))

code/modules/vehicles/unicycle.dm

@@ -29,9 +29,9 @@
 		return 0
 	return ..(M)
 
-/obj/vehicle/unicycle/MouseDrop_T(atom/dropping, mob/user)
-	if(!load(dropping))
-		to_chat(user, SPAN_WARNING("You were unable to load \the [dropping] onto \the [src]."))
+/obj/vehicle/unicycle/mouse_drop_receive(atom/dropped, mob/user, params)
+	if(!load(dropped))
+		to_chat(user, SPAN_WARNING("You were unable to load \the [dropped] onto \the [src]."))
 		return
 
 /obj/vehicle/unicycle/attack_hand(var/mob/user as mob)