default partial xkb_types "pc" {
    virtual_modifiers  NumLock;

    type "KEYPAD" {
	modifiers = NumLock;
	map[None] = Level1;
	map[NumLock] = Level2;
	level_name[Level1] = "Base";
	level_name[Level2] = "Number";
    };
};

// On Mac keypads, levels 1 and 2 are swapped.
partial xkb_types "mac" {
    type "KEYPAD" {
	modifiers = None;
	map[None] = Level2;
	level_name[Level2] = "Number";
    };
};

partial xkb_types "microsoft" {
    include "numpad(pc)"
};

// Swiss-German style numeric keypad: Shift and NumLock operate as
// two independent modifiers; however, since we want shift state for
// the cursor keys, only three levels are used from the key mappings.
// Closest type is actually FOUR_LEVEL_X, but most numpad layouts use
// FOUR_LEVEL_MIXED_KEYPAD, so that's the one we are going to override.
partial xkb_types "shift3" {
    virtual_modifiers Alt, NumLock;

    type "FOUR_LEVEL_MIXED_KEYPAD" {
	modifiers = Shift + NumLock + Control + Alt;

	// NumLock Off => navigate using cursor keys
	map[None] = Level1;

	// NumLock Off + Shift pressed => select using cursor keys
	preserve[Shift] = Shift;

	// NumLock On => decimal digits
	map[NumLock] = Level2;

	// NumLock On + Shift pressed => auxiliary symbols,
	// e.g. hexadecimal digits
	map[Shift+NumLock] = Level3;

	// Ctrl and Alt, regardless of NumLock and Shift => command keys
	preserve[Control] = Control;
	preserve[Alt] = Alt;
	preserve[Shift+Control] = Shift + Control;
	preserve[Shift+Alt] = Shift + Alt;
	map     [NumLock+Control] = Level2;
	preserve[NumLock+Control] = Control;
	map     [NumLock+Alt] = Level2;
	preserve[NumLock+Alt] = Alt;
	map     [Control+Alt] = Level4;

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

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

	level_name[Level1] = "Base";
	level_name[Level2] = "NumLock";
	level_name[Level3] = "Shift+NumLock";
	level_name[Level4] = "Ctrl+Alt";
    };
};