[MIRROR] Adds screentips to rolling beds and body bags. [MDB IGNORE] (#15140)

* Adds screentips to rolling beds and body bags. (#68331)

Co-authored-by: Mothblocks <35135081+Mothblocks@ users.noreply.github.com>

* Adds screentips to rolling beds and body bags.

Co-authored-by: ArcaneMusic <41715314+ArcaneMusic@users.noreply.github.com>
Co-authored-by: Mothblocks <35135081+Mothblocks@ users.noreply.github.com>

code/datums/elements/screentips/contextual_screentip_sharpness.dm

@@ -0,0 +1,57 @@
+/// Apply basic contextual screentips when the user hovers over this item with an item of the given tool behavior.
+/// A "Type B" interaction.
+/// This stacks with other contextual screentip elements, though you may want to register the signal/flag manually at that point for performance.
+/datum/element/contextual_screentip_sharpness
+	element_flags = ELEMENT_BESPOKE | ELEMENT_DETACH
+	id_arg_index = 2
+
+	/// If set, the text to show for LMB
+	var/lmb_text
+
+	/// If set, the text to show for RMB
+	var/rmb_text
+
+/datum/element/contextual_screentip_sharpness/Attach(datum/target, lmb_text, rmb_text)
+	. = ..()
+	if (!isatom(target))
+		return ELEMENT_INCOMPATIBLE
+
+	src.lmb_text = lmb_text
+	src.rmb_text = rmb_text
+
+	var/atom/atom_target = target
+	atom_target.flags_1 |= HAS_CONTEXTUAL_SCREENTIPS_1
+	RegisterSignal(atom_target, COMSIG_ATOM_REQUESTING_CONTEXT_FROM_ITEM, .proc/on_requesting_context_from_item)
+
+/datum/element/contextual_screentip_sharpness/Detach(datum/source, ...)
+	UnregisterSignal(source, COMSIG_ATOM_REQUESTING_CONTEXT_FROM_ITEM)
+
+	// We don't remove HAS_CONTEXTUAL_SCREENTIPS_1, since there could be other stuff still hooked to it,
+	// and being set without signals is not dangerous, just less performant.
+	// A lot of things don't do this, perhaps make a proc that checks if any signals are still set, and if not,
+	// remove the flag.
+
+	return ..()
+
+/datum/element/contextual_screentip_sharpness/proc/on_requesting_context_from_item(
+	datum/source,
+	list/context,
+	obj/item/held_item,
+)
+	SIGNAL_HANDLER
+
+	if (isnull(held_item))
+		return NONE
+
+	var/sharpness = held_item.get_sharpness()
+	if (!sharpness)
+		return NONE
+
+	if (!isnull(lmb_text))
+		context[SCREENTIP_CONTEXT_LMB] = lmb_text
+
+	if (!isnull(rmb_text))
+		context[SCREENTIP_CONTEXT_RMB] = rmb_text
+
+	return CONTEXTUAL_SCREENTIP_SET
+