Merge pull request #11433 from Ghommie/Ghommie-cit616

Spellcasting element
2020-04-03 16:31:10 -07:00
parent 12d78dd7d8 2045fb86f6
commit 413ded02c0
52 changed files with 274 additions and 231 deletions
@@ -0,0 +1,37 @@
+/datum/element/spellcasting //allows to cast certain spells or skip requirements.
+	element_flags = ELEMENT_BESPOKE|ELEMENT_DETACH
+	id_arg_index = 2
+	var/cast_flags
+	var/cast_slots
+	var/list/users_by_item = list()
+
+/datum/element/spellcasting/Attach(datum/target, _flags, _slots)
+	. = ..()
+	if(isitem(target))
+		RegisterSignal(target, COMSIG_ITEM_EQUIPPED, .proc/on_equip)
+		RegisterSignal(target, COMSIG_ITEM_DROPPED, .proc/on_drop)
+	else if(ismob(target))
+		RegisterSignal(target, COMSIG_MOB_SPELL_CAST_CHECK, .proc/on_cast)
+	else
+		return ELEMENT_INCOMPATIBLE
+	cast_flags = _flags
+	cast_slots = _slots
+
+/datum/element/spellcasting/Detach(datum/target)
+	. = ..()
+	UnregisterSignal(target, list(COMSIG_ITEM_EQUIPPED, COMSIG_ITEM_DROPPED, COMSIG_MOB_SPELL_CAST_CHECK))
+	if(users_by_item[target])
+		var/mob/user = users_by_item[target]
+		UnregisterSignal(user, COMSIG_MOB_SPELL_CAST_CHECK)
+
+/datum/element/spellcasting/proc/on_equip(datum/source, mob/equipper, slot)
+	if(slot in cast_slots)
+		RegisterSignal(equipper, COMSIG_MOB_SPELL_CAST_CHECK, .proc/on_cast)
+		users_by_item[source] = equipper
+
+/datum/element/spellcasting/proc/on_drop(datum/source, mob/user)
+	UnregisterSignal(user, COMSIG_MOB_SPELL_CAST_CHECK)
+	users_by_item -= source
+
+/datum/element/spellcasting/proc/on_cast(mob/caster, obj/effect/proc_holder/spell)
+	return cast_flags