Add inventory item tooltips

code/game/objects/items.dm

@@ -94,6 +94,8 @@
 
 	var/drop_sound = 'sound/items/drop/device.ogg' // drop sound - this is the default
 
+	var/tip_timer // reference to timer id for a tooltip we might open soon
+
 /obj/item/New()
 	..()
 	if(embed_chance < 0)
@@ -882,4 +884,18 @@ modules/mob/living/carbon/human/life.dm if you die, you will be zoomed out.
 	return FALSE
 
 /obj/item/proc/is_welder()
-	return FALSE
+	return FALSE
+
+/obj/item/MouseEntered(location,control,params)
+	. = ..()
+	if(usr.is_preference_enabled(/datum/client_preference/inv_tooltips) && ((src in usr) || isstorage(loc))) // If in inventory or in storage we're looking at
+		var/user = usr
+		tip_timer = addtimer(CALLBACK(src, .proc/openTip, location, control, params, user), 5, TIMER_STOPPABLE)
+
+/obj/item/MouseExited()
+	. = ..()
+	deltimer(tip_timer)
+	closeToolTip(usr)
+
+/obj/item/proc/openTip(location, control, params, user)
+	openToolTip(user, src, params, title = name, content = desc)

code/modules/client/preference_setup/global/setting_datums.dm

@@ -165,6 +165,12 @@ var/list/_client_preferences_by_type
 	enabled_description = "Show"
 	disabled_description = "Hide"
 
+/datum/client_preference/inv_tooltips
+	description ="Inventory tooltips"
+	key = "INV_TOOLTIPS"
+	enabled_description = "Show"
+	disabled_description = "Hide"
+
 /datum/client_preference/attack_icons
 	description ="Attack icons"
 	key = "ATTACK_ICONS"

code/modules/client/preferences_toggle_procs.dm

@@ -295,6 +295,19 @@
 
 	feedback_add_details("admin_verb","TMobTooltips") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!
 
+/client/verb/toggle_inv_tooltips()
+	set name = "Toggle Item Tooltips"
+	set category = "Preferences"
+	set desc = "Toggles displaying name/desc over items when moused over (only applies in inventory)."
+
+	var/pref_path = /datum/client_preference/inv_tooltips
+	toggle_preference(pref_path)
+	SScharacter_setup.queue_preferences_save(prefs)
+
+	to_chat(src,"You will now [(is_preference_enabled(/datum/client_preference/inv_tooltips)) ? "see" : "not see"] inventory tooltips.")
+
+	feedback_add_details("admin_verb","TInvTooltips") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!
+
 /client/verb/toggle_hear_instruments()
 	set name = "Toggle Hear/Ignore Instruments"
 	set category = "Preferences"