// http://www.x.org/archive/X11R6.8.2/doc/XKB-Enhancing4.html
// https://www.charvolant.org/doug/xkb/html/index.htm
// https://wiki.archlinux.org/index.php/X_KeyBoard_extension
// http://grahamwideman.wikispaces.com/linux+--+keyboard+configuration,+xkb
// on actions: https://www.x.org/releases/X11R7.6/doc/kbproto/xkbproto.html#key_actions


// full layout with de as base
default hidden partial alphanumeric_keys
xkb_symbols "de" {
    include "de"
    include "neolight(layers)"
    name[Group1] = "German (Neolight)";
};

// full layout with de as base
hidden partial alphanumeric_keys
xkb_symbols "de_escape_keys" {
    include "de"
    include "neolight(layers)"
    include "neolight(escape_keys)"
    name[Group1] = "German (Neolight, additional escape keys)";
};

// the additional layers
hidden partial alphanumeric_keys
xkb_symbols "layers" {
    // preserves AltGr and Shift+AltGr levels
    include "neolight(modifiers)"

    // virtual modifiers:
    // [None, Shift, LevelThree, LevelThree + Shift, LevelFive, LevelFive + Shift, LevelThree + LevelFive, LevelThree + LevelFive + Shift]
    key.type[Group1] = "EIGHT_LEVEL";

    // Number row
    // --------------------------------------------------------------
    key <AE01> {  // 1
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, onesuperior, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AE02> {  // 2
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, twosuperior, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AE03> {  // 3
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, threesuperior, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AE04> {  // 4
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, U203A, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AE05> {  // 5
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, U2039, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AE06> {  // 6
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, cent, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };

    key <AE07> {  // 7
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, yen, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AE08> {  // 8
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, singlelowquotemark, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AE09> {  // 9
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, leftsinglequotemark, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AE10> {  // 0
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, rightsinglequotemark, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };

    key <AE11> {  // ß
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, NoSymbol, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AE12> {  // ´
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, dead_abovering, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };

    // Top row
    // --------------------------------------------------------------
    key <AD01> {  // q
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, ellipsis, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<PGUP>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<PGUP>, clearmods=LevelThree+LevelFive)]
    };
    key <AD02> {  // w
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, underscore, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<BKSP>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<BKSP>, clearmods=LevelThree+LevelFive)]
    };
    key <AD03> {  // e
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, bracketleft, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<UP>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<UP>, clearmods=LevelThree+LevelFive)]
    };
    key <AD04> {  // r
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, bracketright, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<DELE>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<DELE>, clearmods=LevelThree+LevelFive)]
    };
    key <AD05> {  // t
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, asciicircum, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<PGDN>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<PGDN>, clearmods=LevelThree+LevelFive)]
    };

    key <AD06> {  // z
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, exclam, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AD07> {  // u
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, less, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AD08> {  // i
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, greater, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AD09> {  // o
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, equal, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AD10> {  // p
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, ampersand, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };

    key <AD11> {  // ü
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, U017F, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AD12> {  // +
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, NoSymbol, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };

    // Middle row
    // --------------------------------------------------------------
    key <AC01> {  // a
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, backslash, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<HOME>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<HOME>, clearmods=LevelThree+LevelFive)]
    };
    key <AC02> {  // s
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, slash, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<LEFT>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<LEFT>, clearmods=LevelThree+LevelFive)]
    };
    key <AC03> {  // d
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, braceleft, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<DOWN>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<DOWN>, clearmods=LevelThree+LevelFive)]
    };
    key <AC04> {  // f
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, braceright, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<RGHT>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<RGHT>, clearmods=LevelThree+LevelFive)]
    };
    key <AC05> {  // g
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, asterisk, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<END>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<END>, clearmods=LevelThree+LevelFive)]
    };

    key <AC06> {  // h
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, question, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<LEFT>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<LEFT>, clearmods=LevelThree+LevelFive)]
    };
    key <AC07> {  // j
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, parenleft, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<DOWN>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<DOWN>, clearmods=LevelThree+LevelFive)]
    };
    key <AC08> {  // k
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, parenright, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<UP>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<UP>, clearmods=LevelThree+LevelFive)]
    };
    key <AC09> {  // l
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, minus, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<RGHT>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<RGHT>, clearmods=LevelThree+LevelFive)]
    };
    key <AC10> {  // ö
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, colon, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };

    key <AC11> {  // ä
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, at, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };

    // Bottom row
    // --------------------------------------------------------------
    key <AB01> {  // y
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, numbersign, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<ESC>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<ESC>, clearmods=LevelThree+LevelFive)]
    };
    key <AB02> {  // x
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, dollar, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<TAB>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<TAB>, clearmods=LevelThree+LevelFive)]
    };
    key <AB03> {  // c
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, bar, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AB04> {  // v
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, asciitilde, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), RedirectKey(keycode=<RTRN>, clearmods=LevelThree+LevelFive), RedirectKey(keycode=<RTRN>, clearmods=LevelThree+LevelFive)]
    };
    key <AB05> {  // b
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, grave, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };

    key <AB06> {  // n
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, plus, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AB07> {  // m
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, percent, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AB08> {  // ,
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, quotedbl, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AB09> {  // .
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, apostrophe, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
    key <AB10> {  // -
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, semicolon, NoSymbol, NoSymbol],
        actions[Group1] = [NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction(), NoAction()]
    };
};

hidden partial modifier_keys
xkb_symbols "modifiers" {
    // modifier keys for layer 3
    // alt+caps still activates capslock
    key <CAPS> {
        type[Group1] = "PC_ALT_LEVEL2",
        symbols[Group1] = [ISO_Level5_Shift, Caps_Lock]
    };
    key <AC12> { // # key
        type[Group1] = "ONE_LEVEL",
        symbols[Group1] = [ISO_Level5_Shift]
    };

    // modifier keys for layer 4
    key <LSGT> { // < key
        type[Group1] = "ONE_LEVEL",
        symbols[Group1] = [VoidSymbol],
        actions[Group1] = [SetMods(modifiers=LevelThree+LevelFive)]
    };
    key <MENU> {
        type[Group1] = "ONE_LEVEL",
        symbols[Group1] = [VoidSymbol],
        actions[Group1] = [SetMods(modifiers=LevelThree+LevelFive)]
    };
};

// additional escape keys for vim users
hidden partial alphanumeric_keys
xkb_symbols "escape_keys" {
    key <AD01> {  // q
        symbols[Group1] = [NoSymbol, NoSymbol, NoSymbol, NoSymbol, Escape, NoSymbol]
    };
    key <AD12> {  // +
        symbols[Group1] = [Escape, NoSymbol, NoSymbol, NoSymbol, Escape, NoSymbol]
    };
};

// can be used together with e.g. Mozc to toggle the japanese IME
hidden partial alphanumeric_keys
xkb_symbols "jp" {
    key <TLDE> { // ^
        symbols[Group1] = [Zenkaku_Hankaku]
    };
};