pushies.

code/game/atoms.dm

@@ -1450,11 +1450,50 @@
 /atom/MouseEntered(location, control, params)
 	. = ..()
 	// Screentips
-	var/client/client = usr?.client
-	var/datum/hud/active_hud = client?.mob?.hud_used
+	var/mob/user = usr
+	if(isnull(user) && !user.client)
+		return
+
+	var/datum/hud/active_hud = user.hud_used
 	if(active_hud)
-		if(!client.prefs.screentip_pref || (flags_1 & NO_SCREENTIPS_1))
+		var/screentips_enabled = user.client.prefs.screentip_pref
+		if(screentips_enabled == SCREENTIP_PREFERENCE_DISABLED || (flags_1 & NO_SCREENTIPS_1))
 			active_hud.screentip_text.maptext = ""
 		else
-			//We inline a MAPTEXT() here, because there's no good way to statically add to a string like this
-			active_hud.screentip_text.maptext = MAPTEXT("<span style='text-align: center; font-size: 32px; color: [client?.prefs?.screentip_color]'>[name]</span>")
+			var/extra_context = ""
+
+			if (isliving(user))
+				var/obj/item/held_item = user.get_active_held_item()
+
+				if ((flags_1 & HAS_CONTEXTUAL_SCREENTIPS_1) || (held_item?.item_flags & ITEM_HAS_CONTEXTUAL_SCREENTIPS))
+					var/list/context = list()
+
+					var/contextual_screentip_returns = \
+						SEND_SIGNAL(src, COMSIG_ATOM_REQUESTING_CONTEXT_FROM_ITEM, context, held_item, user) \
+						| (held_item && SEND_SIGNAL(held_item, COMSIG_ITEM_REQUESTING_CONTEXT_FOR_TARGET, context, src, user))
+
+					if (contextual_screentip_returns & CONTEXTUAL_SCREENTIP_SET)
+						// LMB and RMB on one line...
+						var/lmb_text = (SCREENTIP_CONTEXT_LMB in context) ? "[SCREENTIP_CONTEXT_LMB]: [context[SCREENTIP_CONTEXT_LMB]]" : ""
+						var/rmb_text = (SCREENTIP_CONTEXT_RMB in context) ? "[SCREENTIP_CONTEXT_RMB]: [context[SCREENTIP_CONTEXT_RMB]]" : ""
+
+						if (lmb_text)
+							extra_context = lmb_text
+							if (rmb_text)
+								extra_context += " | [rmb_text]"
+						else if (rmb_text)
+							extra_context = rmb_text
+
+						// Ctrl-LMB and (in the future) Alt-LMB on another
+						if (SCREENTIP_CONTEXT_CTRL_LMB in context)
+							if (extra_context != "")
+								extra_context += "<br>"
+							extra_context += "[SCREENTIP_CONTEXT_CTRL_LMB]: [context[SCREENTIP_CONTEXT_CTRL_LMB]]"
+
+						extra_context = "<br><span style='font-size: 7px'>[extra_context]</span>"
+
+			if (screentips_enabled == SCREENTIP_PREFERENCE_CONTEXT_ONLY && extra_context == "")
+				active_hud.screentip_text.maptext = ""
+			else
+				//We inline a MAPTEXT() here, because there's no good way to statically add to a string like this
+				active_hud.screentip_text.maptext = "<span class='maptext' style='text-align: center; font-size: 32px; color: [user.client.prefs.screentip_color]'>[name][extra_context]</span>"

code/game/machinery/doors/airlock.dm

@@ -697,6 +697,38 @@
 		. += "<span class='notice'>Alt-click [src] to [ secondsElectrified ? "un-electrify" : "permanently electrify"] it.</span>"
 		. += "<span class='notice'>Ctrl-Shift-click [src] to [ emergency ? "disable" : "enable"] emergency access.</span>"
 
+/obj/machinery/door/airlock/add_context(atom/source, list/context, obj/item/held_item, mob/living/user)
+	. = ..()
+
+	switch (held_item?.tool_behaviour)
+		if (TOOL_CROWBAR)
+			if (panel_open)
+				if (security_level == AIRLOCK_SECURITY_PLASTEEL_O_S || security_level == AIRLOCK_SECURITY_PLASTEEL_I_S)
+					context[SCREENTIP_CONTEXT_LMB] = "Remove shielding"
+					return CONTEXTUAL_SCREENTIP_SET
+				else if (should_try_removing_electronics())
+					context[SCREENTIP_CONTEXT_LMB] = "Remove electronics"
+					return CONTEXTUAL_SCREENTIP_SET
+
+			// Not always contextually true, but is contextually false in ways that make gameplay interesting.
+			// For example, trying to pry open an airlock, only for the bolts to be down and the lights off.
+			context[SCREENTIP_CONTEXT_LMB] = "Pry open"
+
+			return CONTEXTUAL_SCREENTIP_SET
+		if (TOOL_WELDER)
+			context[SCREENTIP_CONTEXT_RMB] = "Weld shut"
+
+			if (panel_open)
+				switch (security_level)
+					if (AIRLOCK_SECURITY_METAL, AIRLOCK_SECURITY_PLASTEEL_I, AIRLOCK_SECURITY_PLASTEEL_O)
+						context[SCREENTIP_CONTEXT_LMB] = "Cut shielding"
+						return CONTEXTUAL_SCREENTIP_SET
+
+			context[SCREENTIP_CONTEXT_LMB] = "Repair"
+			return CONTEXTUAL_SCREENTIP_SET
+
+	return .
+
 /obj/machinery/door/airlock/attack_ai(mob/user)
 	if(!src.canAIControl(user))
 		if(src.canAIHack())
@@ -1024,6 +1056,31 @@
 		return
 	return !operating && density
 
+/// Returns if a crowbar would remove the airlock electronics
+/obj/machinery/door/airlock/proc/should_try_removing_electronics()
+	if (security_level != 0)
+		return FALSE
+
+	if (!panel_open)
+		return FALSE
+
+	if (obj_flags & EMAGGED)
+		return TRUE
+
+	if (!density)
+		return FALSE
+
+	if (!welded)
+		return FALSE
+
+	if (hasPower())
+		return FALSE
+
+	if (locked)
+		return FALSE
+
+	return TRUE
+
 /obj/machinery/door/airlock/try_to_crowbar(obj/item/I, mob/living/user)
 	var/beingcrowbarred = null
 	if(I.tool_behaviour == TOOL_CROWBAR)
@@ -1042,9 +1099,9 @@
 		charge.forceMove(get_turf(user))
 		charge = null
 		return
-	if(beingcrowbarred && panel_open && ((obj_flags & EMAGGED) || (density && welded && !operating && !hasPower() && !locked)))
-		user.visible_message("[user] removes the electronics from the airlock assembly.", \
-							 "<span class='notice'>You start to remove electronics from the airlock assembly...</span>")
+	if(beingcrowbarred && should_try_removing_electronics() && !operating)
+		user.visible_message(span_notice("[user] removes the electronics from the airlock assembly."), \
+			span_notice("You start to remove electronics from the airlock assembly..."))
 		if(I.use_tool(src, user, 40, volume=100))
 			deconstruct(TRUE, user)
 			return

code/game/machinery/doors/door.dm

@@ -55,6 +55,13 @@
 	if(!poddoor)
 		. += "<span class='notice'>Its maintenance panel is <b>screwed</b> in place.</span>"
 
+/obj/machinery/door/add_context(atom/source, list/context, obj/item/held_item, mob/living/user)
+	. = ..()
+
+	if (isnull(held_item))
+		context[SCREENTIP_CONTEXT_LMB] = density ? "Open" : "Close"
+		return CONTEXTUAL_SCREENTIP_SET
+
 /obj/machinery/door/check_access_list(list/access_list)
 	if(red_alert_access && GLOB.security_level >= SEC_LEVEL_RED)
 		return TRUE
@@ -65,6 +72,7 @@
 	set_init_door_layer()
 	update_freelook_sight()
 	air_update_turf(1)
+	register_context()
 	GLOB.airlocks += src
 	spark_system = new /datum/effect_system/spark_spread
 	spark_system.set_up(2, 1, src)

code/game/machinery/doors/firedoor.dm

@@ -46,6 +46,44 @@
 	else
 		. += "<span class='notice'>The bolt locks have been <i>unscrewed</i>, but the bolts themselves are still <b>wrenched</b> to the floor.</span>"
 
+/obj/machinery/door/firedoor/add_context(atom/source, list/context, obj/item/held_item, mob/living/user)
+	. = ..()
+
+	if (isnull(held_item))
+		if (density)
+			// This should be LMB/RMB one day
+			if (user.a_intent == INTENT_HARM)
+				context[SCREENTIP_CONTEXT_LMB] = "Knock"
+			else
+				context[SCREENTIP_CONTEXT_LMB] = "Bash"
+
+			return CONTEXTUAL_SCREENTIP_SET
+		else
+			return .
+
+	switch (held_item.tool_behaviour)
+		if (TOOL_CROWBAR)
+			if (density)
+				context[SCREENTIP_CONTEXT_LMB] = "Close"
+			else if (!welded)
+				context[SCREENTIP_CONTEXT_LMB] = "Hold open"
+				context[SCREENTIP_CONTEXT_RMB] = "Open permanently"
+
+			return CONTEXTUAL_SCREENTIP_SET
+		if (TOOL_WELDER)
+			context[SCREENTIP_CONTEXT_LMB] = welded ? "Unweld shut" : "Weld shut"
+			return CONTEXTUAL_SCREENTIP_SET
+		if (TOOL_WRENCH)
+			if (welded && !boltslocked)
+				context[SCREENTIP_CONTEXT_LMB] = "Unfasten bolts"
+				return CONTEXTUAL_SCREENTIP_SET
+		if (TOOL_SCREWDRIVER)
+			if (welded)
+				context[SCREENTIP_CONTEXT_LMB] = "Unlock bolts"
+				return CONTEXTUAL_SCREENTIP_SET
+
+	return .
+
 /obj/machinery/door/firedoor/proc/CalculateAffectingAreas()
 	remove_from_areas()
 	affecting_areas = get_adjacent_open_areas(src) | get_base_area(src)

code/game/machinery/firealarm.dm

@@ -51,6 +51,12 @@
 	myarea = get_base_area(src)
 	LAZYADD(myarea.firealarms, src)
 
+	AddElement( \
+		/datum/element/contextual_screentip_bare_hands, \
+		lmb_text = "Turn on", \
+		rmb_text = "Turn off", \
+	)
+
 /obj/machinery/firealarm/Destroy()
 	myarea.firereset(src)
 	LAZYREMOVE(myarea.firealarms, src)

code/game/objects/items/devices/scanners.dm

@@ -91,6 +91,11 @@ GENETICS SCANNER
 	var/scanmode = SCANMODE_HEALTH
 	var/advanced = FALSE
 
+/obj/item/healthanalyzer/Initialize(mapload)
+	. = ..()
+
+	register_item_context()
+
 /obj/item/healthanalyzer/suicide_act(mob/living/carbon/user)
 	user.visible_message("<span class='suicide'>[user] begins to analyze [user.p_them()]self with [src]! The display shows that [user.p_theyre()] dead!</span>")
 	return BRUTELOSS
@@ -130,6 +135,24 @@ GENETICS SCANNER
 
 	add_fingerprint(user)
 
+/obj/item/healthanalyzer/add_item_context(
+	obj/item/source,
+	list/context,
+	atom/target,
+)
+	if (!isliving(target))
+		return NONE
+
+	switch (scanmode)
+		if (SCANMODE_HEALTH)
+			context[SCREENTIP_CONTEXT_LMB] = "Scan health"
+		if (SCANMODE_CHEMICAL)
+			context[SCREENTIP_CONTEXT_LMB] = "Scan chemicals"
+		if (SCANMODE_WOUND)
+			context[SCREENTIP_CONTEXT_LMB] = "Scan wounds"
+
+	return CONTEXTUAL_SCREENTIP_SET
+
 // Used by the PDA medical scanner too
 /proc/healthscan(mob/user, mob/living/M, mode = 1, advanced = FALSE)
 	if(isliving(user) && (user.incapacitated() || user.eye_blind))

code/game/objects/items/handcuffs.dm

@@ -122,6 +122,21 @@
 	breakouttime = 300 //Deciseconds = 30s
 	cuffsound = 'sound/weapons/cablecuff.ogg'
 
+/obj/item/restraints/handcuffs/cable/Initialize(mapload)
+	. = ..()
+
+	var/static/list/hovering_item_typechecks = list(
+		/obj/item/stack/rods = list(
+			SCREENTIP_CONTEXT_LMB = "Craft wired rod",
+		),
+
+		/obj/item/stack/sheet/metal = list(
+			SCREENTIP_CONTEXT_LMB = "Craft bola",
+		),
+	)
+
+	AddElement(/datum/element/contextual_screentip_item_typechecks, hovering_item_typechecks)
+
 /obj/item/restraints/handcuffs/cable/attack_self(mob/user)
 	to_chat(user, "<span class='notice'>You start unwinding the cable restraints back into coil</span>")
 	if(!do_after(user, 25, TRUE, user))

code/game/objects/items/stunbaton.dm

@@ -30,6 +30,24 @@
 	var/status_duration = 3 SECONDS //how long our status effects last for otherwise
 	COOLDOWN_DECLARE(shove_cooldown)
 
+	/// The context to show when the baton is active and targetting a living thing
+	var/context_living_target_active = "Stun"
+
+	/// The context to show when the baton is active and targetting a living thing in combat mode
+	var/context_living_target_active_combat_mode = "Stun"
+
+	/// The context to show when the baton is inactive and targetting a living thing
+	var/context_living_target_inactive = "Prod"
+
+	/// The context to show when the baton is inactive and targetting a living thing in combat mode
+	var/context_living_target_inactive_combat_mode = "Attack"
+
+	/// The RMB context to show when the baton is active and targetting a living thing
+	var/context_living_rmb_active = "Attack"
+
+	/// The RMB context to show when the baton is inactive and targetting a living thing
+	var/context_living_rmb_inactive = "Attack"
+
 /obj/item/melee/baton/examine(mob/user)
 	. = ..()
 	. += "<span class='notice'>Right click attack while in combat mode to knockdown, but only once per [cooldown_duration / 10] seconds.</span>"
@@ -54,6 +72,8 @@
 			cell = new preload_cell_type(src)
 	update_icon()
 
+	register_item_context()
+
 /obj/item/melee/baton/DoRevenantThrowEffects(atom/target)
 	switch_status()
 
@@ -155,6 +175,30 @@
 	if(!interrupt)
 		return ..()
 
+/obj/item/melee/baton/add_item_context(datum/source, list/context, atom/target, mob/living/user)
+	if (isturf(target))
+		return NONE
+
+	if (isobj(target))
+		context[SCREENTIP_CONTEXT_LMB] = "Attack"
+	else
+		if (turned_on)
+			context[SCREENTIP_CONTEXT_RMB] = context_living_rmb_active
+
+			if (user.a_intent == INTENT_HARM)
+				context[SCREENTIP_CONTEXT_LMB] = context_living_target_active_combat_mode
+			else
+				context[SCREENTIP_CONTEXT_LMB] = context_living_target_active
+		else
+			context[SCREENTIP_CONTEXT_RMB] = context_living_rmb_inactive
+
+			if (user.a_intent == INTENT_HARM)
+				context[SCREENTIP_CONTEXT_LMB] = context_living_target_inactive_combat_mode
+			else
+				context[SCREENTIP_CONTEXT_LMB] = context_living_target_inactive
+
+	return CONTEXTUAL_SCREENTIP_SET
+
 /obj/item/melee/baton/alt_pre_attack(atom/A, mob/living/user, params)
 	if(!user.CheckActionCooldown(CLICK_CD_MELEE))
 		return

code/game/objects/items/weaponry.dm

@@ -583,6 +583,21 @@ for further reading, please see: https://github.com/tgstation/tgstation/pull/301
 	attack_verb = list("hit", "bludgeoned", "whacked", "bonked")
 	wound_bonus = -10
 
+/obj/item/wirerod/Initialize(mapload)
+	. = ..()
+
+	var/static/list/hovering_item_typechecks = list(
+		/obj/item/shard = list(
+			SCREENTIP_CONTEXT_LMB = "Craft spear",
+		),
+
+		/obj/item/assembly/igniter = list(
+			SCREENTIP_CONTEXT_LMB = "Craft stunprod",
+		),
+	)
+
+	AddElement(/datum/element/contextual_screentip_item_typechecks, hovering_item_typechecks)
+
 /obj/item/wirerod/attackby(obj/item/I, mob/user, params)
 	if(istype(I, /obj/item/shard))
 		var/obj/item/spear/S = new /obj/item/spear

code/game/objects/structures/tables_racks.dm

@@ -490,6 +490,19 @@
 	// the sprites in the editor to see why.
 	icon = smooth_icon
 
+	if (!(flags_1 & NODECONSTRUCT_1))
+		var/static/list/tool_behaviors = list(
+			TOOL_SCREWDRIVER = list(
+				SCREENTIP_CONTEXT_RMB = "Disassemble",
+			),
+
+			TOOL_WRENCH = list(
+				SCREENTIP_CONTEXT_RMB = "Deconstruct",
+			),
+		)
+
+		AddElement(/datum/element/contextual_screentip_tools, tool_behaviors)
+
 /obj/structure/table/wood/fancy/black
 	icon_state = "fancy_table_black"
 	buildstack = /obj/item/stack/tile/carpet/black
@@ -704,7 +717,7 @@
 	. = !density
 	if(istype(caller))
 		. = . || (caller.pass_flags & PASSTABLE)
-		
+
 /obj/structure/rack/MouseDrop_T(obj/O, mob/user)
 	. = ..()
 	if ((!( istype(O, /obj/item) ) || user.get_active_held_item() != O))