Turning a few components into elements. (#12325)

* Turning a few components into elements. * eh
2020-05-24 22:06:27 +02:00
parent 02f467654e
commit ce1f1bdf5e
20 changed files with 116 additions and 100 deletions
@@ -0,0 +1,30 @@
+/datum/element/forced_gravity
+	element_flags = ELEMENT_BESPOKE
+	id_arg_index = 2
+	var/gravity
+	var/ignore_space
+
+/datum/element/forced_gravity/Attach(datum/target, gravity=1, ignore_space=FALSE)
+	. = ..()
+	if(!isatom(target))
+		return ELEMENT_INCOMPATIBLE
+
+	src.gravity = gravity
+	src.ignore_space = ignore_space
+
+	RegisterSignal(target, COMSIG_ATOM_HAS_GRAVITY, .proc/gravity_check)
+	if(isturf(target))
+		RegisterSignal(target, COMSIG_TURF_HAS_GRAVITY, .proc/turf_gravity_check)
+
+/datum/element/forced_gravity/Detach(datum/source, force)
+	. = ..()
+	var/static/list/signals_b_gone = list(COMSIG_ATOM_HAS_GRAVITY, COMSIG_TURF_HAS_GRAVITY)
+	UnregisterSignal(source, signals_b_gone)
+
+/datum/element/forced_gravity/proc/gravity_check(datum/source, turf/location, list/gravs)
+	if(!ignore_space && isspaceturf(location))
+		return
+	gravs += gravity
+
+/datum/element/forced_gravity/proc/turf_gravity_check(datum/source, atom/checker, list/gravs)
+	return gravity_check(null, source, gravs)