Port /tg/ move manager, drift and jetpack components. (#27698)

* Port /tg/ move manager, drift and jetpack components.

* don't add go through newtonian movement if not moved to a turf

* various cleans for blood drifts and mob speed

* fix slow meteors

* why on fuck's earth aren't speedbikes vehicles

* style lint

* also wtf

* okay i'm an idiot

* fix meaty ore speed and blood decal double stepping

* fix not unbuckling pulled object occupants

* don't bother dealing with immovable rods just yet

* exclude bubblegum and vetus from move manager for now

* fix issues related to null weightless blood icons

* reset blood icon state properly

* fuck it, we'll deal with mobs when basic mobs happen

* break infinite loop in decal splat

code/game/objects/items/weapons/grenades/clusterbuster.dm

@@ -47,7 +47,7 @@
 	icon_state = "clusterbang_segment_active"
 	payload = payload_type
 	active = TRUE
-	walk_away(src, loc, rand(1,4))
+	GLOB.move_manager.move_away(src, loc, rand(1,4))
 	spawn(rand(15,60))
 		prime()
 
@@ -69,7 +69,7 @@
 		var/obj/item/grenade/P = new type(loc)
 		if(istype(P, /obj/item/grenade))
 			P.active = TRUE
-		walk_away(P,loc,rand(1,4))
+		GLOB.move_manager.move_away(P,loc,rand(1,4))
 
 		spawn(rand(15,60))
 			if(!QDELETED(P))

code/game/objects/items/weapons/grenades/grenade.dm

@@ -107,12 +107,11 @@
 
 /obj/item/grenade/attack_hand()
 	///We need to clear the walk_to on grabbing a moving grenade to have it not leap straight out of your hand
-	walk(src, null, null)
+	GLOB.move_manager.stop_looping(src)
 	..()
 
 /obj/item/grenade/Destroy()
-	///We need to clear the walk_to on destroy to allow a grenade which uses walk_to or related to properly GC
-	walk_to(src, 0)
+	GLOB.move_manager.stop_looping(src)
 	return ..()
 
 /obj/item/grenade/cmag_act(mob/user)

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

@@ -348,8 +348,7 @@
 
 	// Make each item scatter a bit
 	for(var/obj/item/I in oldContents)
-		I.forceMove(M)
-		INVOKE_ASYNC(src, PROC_REF(scatter_tray_items), I)
+		do_scatter(I)
 
 	if(prob(50))
 		playsound(M, 'sound/items/trayhit1.ogg', 50, 1)
@@ -359,13 +358,18 @@
 	if(ishuman(M) && prob(10))
 		M.KnockDown(4 SECONDS)
 
-/obj/item/storage/bag/tray/proc/scatter_tray_items(obj/item/I)
-	if(!I)
-		return
+/obj/item/storage/bag/tray/proc/do_scatter(obj/item/tray_item)
+	var/delay = rand(2, 4)
+	var/datum/move_loop/loop = GLOB.move_manager.move_rand(tray_item, GLOB.cardinal, delay, timeout = rand(1, 2) * delay, flags = MOVEMENT_LOOP_START_FAST)
+	//This does mean scattering is tied to the tray. Not sure how better to handle it
+	RegisterSignal(loop, COMSIG_MOVELOOP_POSTPROCESS, PROC_REF(change_speed))
 
-	for(var/i in 1 to rand(1, 2))
-		step(I, pick(NORTH,SOUTH,EAST,WEST))
-		sleep(rand(2, 4))
+/obj/item/storage/bag/tray/proc/change_speed(datum/move_loop/source)
+	SIGNAL_HANDLER // COMSIG_MOVELOOP_POSTPROCESS
+	var/new_delay = rand(2, 4)
+	var/count = source.lifetime / source.delay
+	source.lifetime = count * new_delay
+	source.delay = new_delay
 
 /obj/item/storage/bag/tray/update_icon_state()
 	return
@@ -415,7 +419,7 @@
 		I.forceMove(dropspot)
 		// If there is no table, dump the contents of the tray at our feet like we're doing the service equivilent of a micdrop.
 		if(!found_table && isturf(dropspot))
-			INVOKE_ASYNC(src, PROC_REF(scatter_tray_items), I)
+			INVOKE_ASYNC(src, PROC_REF(do_scatter), I)
 
 	if(found_table)
 		user.visible_message("<span class='notice'>[user] unloads [user.p_their()] serving tray.</span>")

code/game/objects/items/weapons/tanks/jetpack.dm

@@ -10,8 +10,37 @@
 	actions_types = list(/datum/action/item_action/set_internals, /datum/action/item_action/toggle_jetpack, /datum/action/item_action/jetpack_stabilization)
 	var/gas_type = "oxygen"
 	var/on = FALSE
-	var/stabilizers = FALSE
 	var/volume_rate = 500              //Needed for borg jetpack transfer
+	var/stabilize = FALSE
+	var/thrust_callback
+
+/obj/item/tank/jetpack/Initialize(mapload)
+	. = ..()
+	thrust_callback = CALLBACK(src, PROC_REF(allow_thrust), 0.01)
+	configure_jetpack(stabilize)
+
+/obj/item/tank/jetpack/Destroy()
+	thrust_callback = null
+	return ..()
+
+/**
+ * configures/re-configures the jetpack component
+ *
+ * Arguments
+ * stabilize - Should this jetpack be stabalized
+ */
+/obj/item/tank/jetpack/proc/configure_jetpack(stabilize)
+	src.stabilize = stabilize
+
+	AddComponent( \
+		/datum/component/jetpack, \
+		src.stabilize, \
+		COMSIG_JETPACK_ACTIVATED, \
+		COMSIG_JETPACK_DEACTIVATED, \
+		JETPACK_ACTIVATION_FAILED, \
+		thrust_callback, \
+		/datum/effect_system/trail_follow/ion \
+	)
 
 /obj/item/tank/jetpack/populate_gas()
 	if(gas_type)
@@ -37,8 +66,8 @@
 
 /obj/item/tank/jetpack/proc/toggle_stabilization(mob/user)
 	if(on)
-		stabilizers = !stabilizers
-		to_chat(user, "<span class='notice'>You turn [src]'s stabilization [stabilizers ? "on" : "off"].</span>")
+		configure_jetpack(!stabilize)
+		to_chat(user, "<span class='notice'>You turn [src]'s stabilization [stabilize ? "on" : "off"].</span>")
 
 /obj/item/tank/jetpack/proc/cycle(mob/user)
 	if(user.incapacitated())
@@ -54,31 +83,40 @@
 		var/datum/action/A = X
 		A.UpdateButtons()
 
-
 /obj/item/tank/jetpack/proc/turn_on(mob/user)
+	if(SEND_SIGNAL(src, COMSIG_JETPACK_ACTIVATED, user) & JETPACK_ACTIVATION_FAILED)
+		return FALSE
+
 	on = TRUE
 	icon_state = "[initial(icon_state)]-on"
 
 /obj/item/tank/jetpack/proc/turn_off(mob/user)
+	SEND_SIGNAL(src, COMSIG_JETPACK_DEACTIVATED, user)
 	on = FALSE
-	stabilizers = FALSE
 	icon_state = initial(icon_state)
 
-/obj/item/tank/jetpack/proc/allow_thrust(num, mob/living/user)
-	if(!on)
-		return 0
+/obj/item/tank/jetpack/dropped(mob/user, silent)
+	. = ..()
+	if(on)
+		turn_off(user)
+
+/obj/item/tank/jetpack/proc/allow_thrust(num)
+	if(!ismob(loc))
+		return FALSE
+	var/mob/user = loc
+
 	if((num < 0.005 || air_contents.total_moles() < num))
 		turn_off(user)
-		return 0
+		return FALSE
 
 	var/datum/gas_mixture/removed = air_contents.remove(num)
 	if(removed.total_moles() < 0.005)
 		turn_off(user)
-		return 0
+		return FALSE
 
 	var/turf/T = get_turf(user)
 	T.blind_release_air(removed)
-	return 1
+	return TRUE
 
 /obj/item/tank/jetpack/improvised
 	name = "improvised jetpack"