keyboard.nix

# Trust Multimedia Scroll Keyboard, KB-2200
# https://help.ubuntu.com/community/TrustMultimediaScrollKeyboardKB-2200
{ pkgs, ... }:

let
  keymap = pkgs.writeText "keymap.xkb" ''
    xkb_keymap {
      xkb_keycodes  { include "evdev+aliases(qwerty)" };
      xkb_types     { include "complete"	};
      xkb_compat    { include "complete"	};
      xkb_symbols   { include "pc+us(euro)+inet(evdev)+compose(menu)"
        // mark 131 Hangul_Hanja
        key <HJCV> { [ XF86Cut ] };
        // paste 132 NoSymbol/Yen
        key <AE13> { [ XF86Paste ] };
        // home 180 XF86HomePage
        // mail 163 XF86Mail
        // search 255 XF86Search
        // calculator 148 XF86Calculator
        // explorer 152 XF86Explorer
        // reload 181 XF86Reload
        // favorites 164 XF86Favorites
        // calendar 102 Muhenkan
        key <MUHE> { [ XF86Calendar ] };
        // pictures / powerpoint 100 Henkan_Mode
        key <HENK> { [ XF86Pictures ] };
        // excel 101 Hiragana_Katakana
        key <HKTG> { [ XF86Excel ] };
        // music 179 XF86Tools
        key <I179> { [ XF86AudioMedia ] };
        // audio prev 173 XF86AudioPrev
        // audio next 171 XF86AudioNext
        // audio play pause 172 XF86AudioPlay
        // sleep 150 XF86Sleep
        // poweroff 124 XF86PowerOff
      };
      xkb_geometry  { include "pc(pc104)"	};
    };
  '';

in {
  i18n.consoleUseXkbConfig = true;

  environment.systemPackages = with pkgs; [ xorg.xkbcomp ];

  environment.etc."X11/keymap.xkb".source = keymap;

  services.xserver = {
    layout = "us";
    xkbVariant = "euro";
    xkbOptions = "compose:menu";
    displayManager.sessionCommands = ''
      ${pkgs.xorg.xkbcomp}/bin/xkbcomp ${keymap} $DISPLAY
    '';
  };
}