Adding an Interact hotkey.

code/game/atoms.dm

@@ -73,6 +73,9 @@
 	/// (DATUM) Similar to above, but largely used by /turf/wall, /obj/structure and /obj/item/stack/material
 	var/decl/material/reinf_material
 
+	/// (BOOLEAN) Set to TRUE to prioritise this atom when using the interact hotkey.
+	var/interaction_priority
+
 /atom/proc/get_max_health()
 	return max_health
 

code/game/machinery/_machines_base/machinery.dm

@@ -81,6 +81,7 @@ Class Procs:
 	)
 	temperature_sensitive = TRUE
 	abstract_type = /obj/machinery
+	interaction_priority = TRUE
 
 	var/stat = 0
 	var/waterproof = TRUE

code/game/machinery/doors/_door.dm

@@ -15,6 +15,7 @@
 	uncreated_component_parts = null
 	required_interaction_dexterity = DEXTERITY_SIMPLE_MACHINES
 	max_health = 300
+	interaction_priority = TRUE
 
 	var/can_open_manually = TRUE
 

code/game/objects/items/__item.dm

@@ -5,6 +5,7 @@
 	pass_flags = PASS_FLAG_TABLE
 	abstract_type = /obj/item
 	temperature_sensitive = TRUE
+	interaction_priority = TRUE
 
 	/// Set to prefix name with this string ('woven' for 'woven basket' etc)
 	var/name_prefix

code/game/objects/structures/doors/_door.dm

@@ -9,6 +9,7 @@
 	anchored              = TRUE
 	opacity               = TRUE
 	structure_flags       = STRUCTURE_FLAG_THROWN_DAMAGE
+	interaction_priority  = TRUE
 	var/has_window        = FALSE
 	var/changing_state    = FALSE
 	var/door_sound_volume = 25

code/game/objects/structures/fences/_fences.dm

@@ -227,6 +227,7 @@
 	name = "fence gate"
 	desc = "Much like a regular door, but thinner."
 	icon_state = "door-closed"
+	interaction_priority   = TRUE
 
 /obj/structure/fence/door/can_install_lock()
 	return TRUE

code/game/objects/structures/inflatable.dm

@@ -192,6 +192,7 @@
 	density = TRUE
 	anchored = TRUE
 	opacity = FALSE
+	interaction_priority = TRUE
 
 	icon_state = "door_closed"
 	undeploy_path = /obj/item/inflatable/door

code/modules/atmospherics/atmospherics.dm

@@ -14,6 +14,7 @@ Pipelines + Other Objects -> Pipe network
 	idle_power_usage = 0
 	active_power_usage = 0
 	power_channel = ENVIRON
+	interaction_priority = null
 
 	var/power_rating //the maximum amount of power the machine can use to do work, affects how powerful the machine is, in Watts
 

code/modules/keybindings/binds/mob.dm

@@ -183,3 +183,42 @@
 /datum/keybinding/mob/minimal_hud/down(client/user)
 	user.mob.minimize_hud()
 	return TRUE
+
+/datum/keybinding/mob/interact
+	hotkey_keys = list("Enter")
+	name = "interact"
+	full_name = "Interact"
+	description = "Interact with the turf directly in front of you."
+
+/datum/keybinding/mob/interact/down(client/user)
+	user.mob.interact_with_facing()
+	return TRUE
+
+/mob/proc/interact_with_facing()
+
+	var/turf/facing = get_step(get_turf(src), dir)
+	if(!istype(facing))
+		return
+
+	var/atom/click_on
+	if(length(facing.contents))
+		var/list/atoms = sortTim(facing.contents.Copy(), /proc/cmp_planelayer)
+
+		// Move non-prioritised atoms to the end of the list (to avoid burning our hands on lights when trying to open a closet)
+		for(var/atom/clickable as anything in atoms)
+			if(!clickable.interaction_priority)
+				atoms -= clickable
+				atoms += clickable
+
+		// Try to click something.
+		for(var/atom/clickable as anything in atoms)
+			if(!clickable.simulated)
+				continue
+			if(clickable.invisibility > see_invisible)
+				continue
+			click_on = clickable
+			break
+	else
+		click_on = facing
+
+	click_on?.Click()

code/modules/lights/light_fixture_base.dm

@@ -12,6 +12,7 @@
 	idle_power_usage = 2
 	active_power_usage = 20
 	power_channel = LIGHT //Lights are calc'd via area so they dont need to be in the machine list
+	interaction_priority = null
 
 	uncreated_component_parts = list(
 		/obj/item/stock_parts/power/apc