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  Alt, LevelThree, LevelFive, NumLock;

    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] = "AltGr";
	level_name[Level4] = "Shift AltGr";
    };

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

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

    // Default type used in xkbcomp and xkbcommon
    type "FOUR_LEVEL_KEYPAD" {
	modifiers = Shift + NumLock + LevelThree;
	map     [None] = Level1;
	map     [Shift] = Level1;
	preserve[Shift] = Shift;
	map     [NumLock] = Level2;
	map     [LevelThree] = Level3;
	map     [Shift+NumLock] = Level2;
	preserve[Shift+NumLock] = Shift;
	map     [Shift+LevelThree] = Level4;
	map     [NumLock+LevelThree] = Level3;
	map     [Shift+NumLock+LevelThree] = Level4;
	level_name[Level1] = "Base";
	level_name[Level2] = "NumLock";
	level_name[Level3] = "AltGr";
	level_name[Level4] = "Shift AltGr";
    };

    // Alias for `FOUR_LEVEL_KEYPAD`
    type "FOUR_LEVEL_MIXED_KEYPAD" {
	modifiers = Shift + NumLock + LevelThree;
	map     [None] = Level1;
	map     [Shift] = Level1;
	preserve[Shift] = Shift;
	map     [NumLock] = Level2;
	map     [LevelThree] = Level3;
	map     [Shift+NumLock] = Level2;
	preserve[Shift+NumLock] = Shift;
	map     [Shift+LevelThree] = Level4;
	map     [NumLock+LevelThree] = Level3;
	map     [Shift+NumLock+LevelThree] = Level4;
	level_name[Level1] = "Base";
	level_name[Level2] = "NumLock";
	level_name[Level3] = "AltGr";
	level_name[Level4] = "Shift AltGr";
    };

    // A variant of FOUR_LEVEL_MIXED_KEYPAD that uses the LevelFive
    // modifier instead of NumLock, to avoid interaction with the keypad;
    // and it uses Shift in its standard role.
    // Originally created to lock the digits on layouts with digits on
    // the second level of the digits row (e.g. Azerty layouts).
    type "FOUR_LEVEL_LOCKABLE_LEVEL2" {
	modifiers = Shift + LevelThree + LevelFive;
	map[None] = Level1;
	map[Shift] = Level2;
	map[LevelFive] = Level2;
	map[Shift+LevelFive] = Level1;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[LevelFive+LevelThree] = Level3;
	map[Shift+LevelFive+LevelThree] = Level4;
	level_name[Level1] = "Base";
	level_name[Level2] = "Digit";
	level_name[Level3] = "AltGr";
	level_name[Level4] = "Shift AltGr";
    };

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

	map     [Shift+LevelThree] = Level3;
	map     [Shift+Control] = Level1;
	preserve[Shift+Control] = Shift+Control;
	map     [Shift+Alt] = Level1;
	preserve[Shift+Alt] = Shift+Alt;
	map     [LevelThree+Control] = Level2;
	preserve[LevelThree+Control] = Control;
	map     [LevelThree+Alt] = Level2;
	preserve[LevelThree+Alt] = Alt;
	map     [Control+Alt] = Level4;

	map     [Shift+LevelThree+Control] = Level3;
	preserve[Shift+LevelThree+Control] = Control;
	map     [Shift+LevelThree+Alt] = Level3;
	preserve[Shift+LevelThree+Alt] = Alt;
	map     [Shift+Control+Alt] = Level4;
	preserve[Shift+Control+Alt] = Shift;
	map     [LevelThree+Control+Alt] = Level2;
	preserve[LevelThree+Control+Alt] = Control+Alt;

	map     [Shift+LevelThree+Control+Alt] = Level3;
	preserve[Shift+LevelThree+Control+Alt] = Control+Alt;

	level_name[Level1] = "Base";
	level_name[Level2] = "AltGr";
	level_name[Level3] = "Shift AltGr";
	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";
	level_name[Level4] = "Caps / 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] = "AltGr";
	level_name[Level4] = "Shift AltGr";
	level_name[Level5] = "Lock";
    };
};