default partial xkb_types "default" {

    // Defines types with a four-level shift, similar to the three-level
    // type from iso9995, but they let the Shift key behave "normally".

    virtual_modifiers  LevelThree;

    type "FOUR_LEVEL" {
	modifiers = Shift + LevelThree;
	map[None] = Level1;
	map[Shift] = Level2;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	level_name[Level1] = "Base";
	level_name[Level2] = "Shift";
	level_name[Level3] = "Alt Base";
	level_name[Level4] = "Shift Alt";
    };

    type "FOUR_LEVEL_ALPHABETIC" {
	modifiers = Shift + Lock + LevelThree;
	map[None] = Level1;
	map[Shift] = Level2;
	map[Lock] = Level2;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[Lock+LevelThree] = Level4;
	map[Shift+Lock+LevelThree] = Level3;
	level_name[Level1] = "Base";
	level_name[Level2] = "Shift";
	level_name[Level3] = "Alt Base";
	level_name[Level4] = "Shift Alt";
    };

    type "FOUR_LEVEL_SEMIALPHABETIC" {
	modifiers = Shift + Lock + LevelThree;
	map[None] = Level1;
	map[Shift] = Level2;
	map[Lock] = Level2;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[Lock+LevelThree] = Level3;
	map[Shift+Lock+LevelThree] = Level4;
	preserve[Lock+LevelThree] = Lock;
	preserve[Shift+Lock+LevelThree] = Lock;
	level_name[Level1] = "Base";
	level_name[Level2] = "Shift";
	level_name[Level3] = "Alt Base";
	level_name[Level4] = "Shift Alt";
    };

    // A four-level keypad variant. The first two levels are controlled by
    // NumLock (with active shifting like in KEYPAD).  LevelThree overrides
    // this mode, with two additional shifted levels.
    type "FOUR_LEVEL_MIXED_KEYPAD" {
	modifiers = Shift + NumLock + LevelThree;
	map[None] = Level1;
	map[Shift+NumLock] = Level1;
	map[NumLock] = Level2;
	map[Shift] = Level2;
	map[LevelThree] = Level3;
	map[NumLock+LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[Shift+NumLock+LevelThree] = Level4;
	level_name[Level1] = "Base";
	level_name[Level2] = "Number";
	level_name[Level3] = "Alt Base";
	level_name[Level4] = "Shift Alt";
    };

    // Base level, two shifted LevelThree levels, one Ctrl+Alt command level.
    type "FOUR_LEVEL_X" {
	modifiers = Shift + LevelThree + Control + Alt;
	map[None] = Level1;
	map[LevelThree] = Level2;
	map[Shift+LevelThree] = Level3;
	map[Control+Alt] = Level4;
	level_name[Level1] = "Base";
	level_name[Level2] = "Alt Base";
	level_name[Level3] = "Shift Alt";
	level_name[Level4] = "Ctrl+Alt";
    };

    // A special type for keys used in the Serbian Latin Unicode keymap.
    // It makes it possible to use all three forms of latin letters
    // present in Unicode that are made up of two separate letters
    // (forms like LJ, Lj, and lj; NJ, Nj, and nj; etcetera).
    type "SEPARATE_CAPS_AND_SHIFT_ALPHABETIC" {
	modifiers = Shift + Lock + LevelThree;
	map[None] = Level1;
	map[Shift] = Level2;
	map[Lock] = Level4;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[Lock+LevelThree] = Level3;
	map[Shift+Lock+LevelThree] = Level3;
	preserve[Lock]= Lock;
	preserve[Lock+LevelThree]= Lock;
	level_name[Level1] = "Base";
	level_name[Level2] = "Shift";
	level_name[Level3] = "AltGr Base";
	level_name[Level4] = "Shift AltGr";
    };

    // Five levels: the normal four levels with Shift and LevelThree,
    // plus a fifth level when CapsLock (and only CapsLock) is active
    // -- CapsLock is ignored when Shift and/or LevelThree is held.
    type "FOUR_LEVEL_PLUS_LOCK" {
	modifiers = Shift + Lock + LevelThree;
	map[None] = Level1;
	map[Shift] = Level2;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[Lock] = Level5;
	map[Shift+Lock] = Level2;
	map[Lock+LevelThree] = Level3;
	map[Shift+Lock+LevelThree] = Level4;
	level_name[Level1] = "Base";
	level_name[Level2] = "Shift";
	level_name[Level3] = "Alt Base";
	level_name[Level4] = "Shift Alt";
	level_name[Level5] = "Lock";
    };
};

// This enables the four-level shifting also for the keypad.
partial xkb_types "keypad" {

    virtual_modifiers  LevelThree;

    type "FOUR_LEVEL_KEYPAD" {
	modifiers = Shift + NumLock + LevelThree;
	map[None] = Level1;
	map[Shift] = Level2;
	map[NumLock] = Level2;
	map[Shift+NumLock] = Level1;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[NumLock+LevelThree] = Level4;
	map[Shift+NumLock+LevelThree] = Level3;
	level_name[Level1] = "Base";
	level_name[Level2] = "Number";
	level_name[Level3] = "Alt Base";
	level_name[Level4] = "Alt Number";
    };
};
