Display Map Name

[Xilef]

What is the RGSS2 code for current map name please?
Thanks anyone who can help.
EDIT: This is my window

#==============================================================================
# ** Window_Mapname
#------------------------------------------------------------------------------
#  This window deals with the map name shown on the CMS.
#==============================================================================
class Window_Mapname < Window_Base
  #--------------------------------------------------------------------------
  # * Object Initialization
  #     x : window X coordinate
  #     y : window Y coordinate
  #--------------------------------------------------------------------------
  def initialize(x, y)
    super(x, y, 268, 52)
    self.back_opacity = 256
    refresh
  end
  #--------------------------------------------------------------------------
  # * Refresh
  #--------------------------------------------------------------------------
  def refresh
  end
end

How would I display the current map name into that?

 

[e]

There is no public accessor for the game map id. It is hidden. In theory.

You can still get with the following tidbit:

$game_map.instance_variable_get("@map_id")

 

[Xilef]

I don't mind if there is a longer code for displaying it. I'll look at some other people's scripts actually.
EDIT: I actually want the map name not ID. sory for the confusion.
EDIT2: Okay I have it now. If anyone else wants to use:

#==============================================================================
# ** Game_Map
#------------------------------------------------------------------------------
#  This is an addon to Game_Map to allow the use of mapname
#  Access it with $game_map.mapname
#==============================================================================
class Game_Map
  attr_reader :map_id
  def mapname
    $mapname = load_data("Data/MapInfos.rvdata")
    $mapname[@map_id].name
  end
end

Place that at the top of your script and access it with $game_map.mapname