// Set a client's focus to an object and override these procs on that object to let it handle keypresses

/// Called when a key is pressed down initially
/datum/proc/key_down(key, client/user)
	return

/// Called when a key is released
/datum/proc/key_up(key, client/user)
	return

/// Called once every server tick
/datum/proc/keyLoop(client/user)
	set waitfor = FALSE
	return

/// Set mob's focus. TODO: Decide if required.
/mob/proc/set_focus(datum/new_focus)
	if(focus == new_focus)
		return
	focus = new_focus

/// Turns a keys bitfield into text showing all bits set
/proc/keys2text(keys)
	if(!keys)
		return ""
	var/list/out = list()
	if(keys & NORTH_KEY)
		out += "NORTH"
	if(keys & SOUTH_KEY)
		out += "SOUTH"
	if(keys & EAST_KEY)
		out += "EAST"
	if(keys & WEST_KEY)
		out += "WEST"
	if(keys & W_KEY)
		out += "W"
	if(keys & A_KEY)
		out += "A"
	if(keys & S_KEY)
		out += "S"
	if(keys & D_KEY)
		out += "D"
	if(keys & CTRL_KEY)
		out += "CTRL"
	if(keys & SHIFT_KEY)
		out += "SHIFT"
	if(keys & ALT_KEY)
		out += "ALT"
	return out.Join(" ")