Aiming Hotkey (#4123)

## About The Pull Request

adds an aiming hotkey for mechs/guns

## Changelog

:cl:
add: aiming hotkey. default bound is shift+z
/:cl:

code/__DEFINES/keybinding.dm

@@ -48,6 +48,7 @@
 #define COMSIG_KB_HUMAN_BAGEQUIP_DOWN "keybinding_human_bagequip_down"
 #define COMSIG_KB_HUMAN_EQUIPMENTSWAP_DOWN "keybinding_human_equipmentswap_down"
 #define COMSIG_KB_HUMAN_SUITEQUIP_DOWN "keybinding_human_suitequip_down"
+#define COMSIG_KB_HUMAN_ADS "keybinding_human_ads"
 
 //Living
 #define COMSIG_KB_LIVING_RESIST_DOWN "keybinding_living_resist_down"

code/datums/keybinding/human.dm

@@ -36,14 +36,28 @@
 	current_human.do_unique_action()
 	return TRUE
 
+/datum/keybinding/human/ads
+	hotkey_keys = list("ShiftZ")
+	name = "aim_down_sights"
+	full_name = "Aim down sighs"
+	description = "Aim down the sights of the currently wielded weapon."
+	keybind_signal = COMSIG_KB_HUMAN_ADS
+
+/datum/keybinding/human/ads/down(client/user)
+	. = ..()
+	if(.)
+		return
+	var/mob/living/carbon/human/current_human = user.mob
+	current_human.do_zoom()
+	return TRUE
+
 /datum/keybinding/human/secondary_action
 	hotkey_keys = list("ShiftSpace")
 	name = "secondary_action"
 	full_name = "Perform secondary action"
 	description = ""
 	keybind_signal = COMSIG_KB_HUMAN_SECONDARYACTION
 
-
 /datum/keybinding/human/secondary_action/down(client/user)
 	. = ..()
 	if(.)
@@ -52,7 +66,6 @@
 	current_human.do_secondary_action()
 	return TRUE
 
-
 /datum/keybinding/human/quick_equip_belt
 	hotkey_keys = list("ShiftE")
 	name = "quick_equip_belt"

code/modules/mob/mob.dm

@@ -662,6 +662,7 @@
 		return
 	limb_attack_self()
 
+///proc to call unique action on whatever we're holding.
 /mob/verb/do_unique_action()
 	set name = "Do Unique Action"
 	set category = "Object"
@@ -682,14 +683,35 @@
 		I.unique_action(src)
 		update_inv_hands()
 
+///proc to call zoom on whatever we're holding.
+/mob/verb/do_zoom()
+	set name = "Aim Down Sights"
+	set category = "Object"
+	set src = usr
+
+	if(ismecha(loc))
+		var/obj/mecha/mecha = loc
+		if(mecha.zoom_action)
+			mecha.zoom_action.Activate()
+			return
+		return
+
+	var/obj/item/I = get_active_held_item()
+	if(istype(I, /obj/item/gun))
+		var/obj/item/gun/our_gun = I
+		if(our_gun.wielded_fully)
+			our_gun.zoom(src, src.dir)
+		update_inv_hands()
+		return
+	return
+
 /mob/verb/do_secondary_action()
 	set name = "Do Secondary Action"
 	set category = "Object"
 	set src = usr
 
 	if(ismecha(loc))
 		return
-
 	if(incapacitated())
 		return
 

code/modules/projectiles/guns/manufacturer/hunter_pride/ballistics.dm

@@ -401,7 +401,8 @@ EMPTY_GUN_HELPER(shotgun/doublebarrel)
 
 // sawn off beforehand
 /obj/item/gun/ballistic/shotgun/doublebarrel/presawn
-	name = "sawn-off double-barreled shotgun"
+	//init gives it the sawn_off name
+	name = "double-barreled shotgun"
 	desc = "A break action shotgun cut down to the size of a sidearm. While the recoil is even harsher, it offers a lot of power in a very small package. Chambered in 12g."
 	sawn_off = TRUE
 	weapon_weight = WEAPON_MEDIUM
@@ -883,7 +884,7 @@ EMPTY_GUN_HELPER(shotgun/doublebarrel/beacon)
 
 //pre sawn off beacon
 /obj/item/gun/ballistic/shotgun/doublebarrel/beacon/presawn
-	name = "sawn-off HP Beacon"
+	name = "HP Beacon"
 	sawn_desc= "A single-shot break-action pistol chambered in .45-70. A bit difficult to aim."
 	sawn_off = TRUE
 	w_class = WEIGHT_CLASS_NORMAL