Adds an item scaling element to growns

code/datums/elements/item_scaling.dm

@@ -0,0 +1,35 @@
+/**
+ * Element for making items change scaling depending on if they appear in the world or in a storage container.
+ * 
+ * For context, overworld items are anything on a turf, storage scaling includes anywhere that the item is used as a UI element.
+ * Scaling should affect the target's icon and any affecting overlays
+ */
+/datum/element/item_scaling
+	element_flags = ELEMENT_BESPOKE
+	id_arg_index = 2
+	/// Value to scale the target by when it's in the overworld (on a turf)
+	var/overworld_scaling = 1
+	/// Value to scale the target by when it's in a storage component or inventory slot
+	var/storage_scaling = 1
+
+/datum/element/item_scaling/Attach(datum/target, overworld_scaling = 1, storage_scaling = 1)
+	. = ..()
+	if(!isatom(target))
+		return ELEMENT_INCOMPATIBLE
+	
+	scale(target, overworld_scaling)
+
+	RegisterSignal(target, list(COMSIG_ITEM_DROPPED, COMSIG_STORAGE_EXITED), .proc/scale_overworld)
+	RegisterSignal(target, list(COMSIG_ITEM_EQUIPPED, COMSIG_STORAGE_ENTERED), .proc/scale_storage)
+
+/datum/element/item_scaling/proc/scale(atom/source, scaling)
+	var/matrix/M = matrix()
+	source.transform = M.Scale(scaling)
+
+/// Signal handler for when the item is dropped
+/datum/element/item_scaling/proc/scale_overworld(datum/source)
+	scale(source, overworld_scaling)
+
+/// Signal handler for when the item is picked up
+/datum/element/item_scaling/proc/scale_storage(datum/source)
+	scale(source, storage_scaling)