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// These variants assign ISO_Level3_Shift to various keys
// so that levels 3 and 4 can be reached.

// The default behaviour:
// the right Alt key (AltGr) chooses the third symbol engraved on a key.
default partial modifier_keys
xkb_symbols "ralt_switch" {
  key <RALT> {[  ISO_Level3_Shift  ], type[group1]="ONE_LEVEL" };
};

// The right Alt key never chooses the third level.
// This option attempts to undo the effect of a layout's inclusion of
// 'ralt_switch'.  You may want to also select another level3 option
// to map the level3 shift to some other key.
partial modifier_keys
xkb_symbols "ralt_alt" {
  key <RALT> {[  Alt_R,  Meta_R  ], type[group1]="TWO_LEVEL" };
  modifier_map Mod1 { <RALT> };
};

// The right Alt key (while pressed) chooses the third shift level,
// and Compose is mapped to its second level.
partial modifier_keys
xkb_symbols "ralt_switch_multikey" {
  key <RALT> {[  ISO_Level3_Shift,  Multi_key  ], type[group1]="TWO_LEVEL" };
};

// Either Alt key (while pressed) chooses the third shift level.
// (To be used mostly to imitate Mac OS functionality.)
partial modifier_keys
xkb_symbols "alt_switch" {
  include "level3(lalt_switch)"
  include "level3(ralt_switch)"
};

// The left Alt key (while pressed) chooses the third shift level.
partial modifier_keys
xkb_symbols "lalt_switch" {
  key <LALT> {[  ISO_Level3_Shift  ], type[group1]="ONE_LEVEL" };
};

// The right Ctrl key (while pressed) chooses the third shift level.
partial modifier_keys
xkb_symbols "switch" {
  key <RCTL> {[  ISO_Level3_Shift  ], type[group1]="ONE_LEVEL" };
};

// The Menu key (while pressed) chooses the third shift level.
partial modifier_keys
xkb_symbols "menu_switch" {
  key <MENU> {[  ISO_Level3_Shift  ], type[group1]="ONE_LEVEL" };
};

// Either Win key (while pressed) chooses the third shift level.
partial modifier_keys
xkb_symbols "win_switch" {
  include "level3(lwin_switch)"
  include "level3(rwin_switch)"
};

// The left Win key (while pressed) chooses the third shift level.
partial modifier_keys
xkb_symbols "lwin_switch" {
  key <LWIN> {[  ISO_Level3_Shift  ], type[group1]="ONE_LEVEL" };
};

// The right Win key (while pressed) chooses the third shift level.
partial modifier_keys
xkb_symbols "rwin_switch" {
  key <RWIN> {[  ISO_Level3_Shift  ], type[group1]="ONE_LEVEL" };
};

// The Enter key on the kepypad (while pressed) chooses the third shift level.
// (This is especially useful for Mac laptops which miss the right Alt key.)
partial modifier_keys
xkb_symbols "enter_switch" {
  key <KPEN> {[  ISO_Level3_Shift  ], type[group1]="ONE_LEVEL" };
};

// The CapsLock key (while pressed) chooses the third shift level.
partial modifier_keys
xkb_symbols "caps_switch" {
  key <CAPS> {[  ISO_Level3_Shift  ], type[group1]="ONE_LEVEL" };
};

// The Backslash key (while pressed) chooses the third shift level.
partial modifier_keys
xkb_symbols "bksl_switch" {
  key <BKSL> {[  ISO_Level3_Shift  ], type[group1]="ONE_LEVEL" };
};

// The AC11 key (while pressed) chooses the third shift level.
partial modifier_keys
xkb_symbols "ac11_switch" {
  key <AC11> {[  ISO_Level3_Shift  ], type[Group1]="ONE_LEVEL" };
};

// The Less/Greater key (while pressed) chooses the third shift level.
partial modifier_keys
xkb_symbols "lsgt_switch" {
  key <LSGT> {[  ISO_Level3_Shift  ], type[group1]="ONE_LEVEL" };
};

// The CapsLock key (while pressed) chooses the third shift level,
// and latches when pressed together with another third-level chooser.
partial modifier_keys
xkb_symbols "caps_switch_latch" {
  key <CAPS> {[  ISO_Level3_Shift,  ISO_Level3_Shift,  ISO_Level3_Latch  ],
                 type[group1]="THREE_LEVEL" };
};

// The Backslash key (while pressed) chooses the third shift level,
// and latches when pressed together with another third-level chooser.
partial modifier_keys
xkb_symbols "bksl_switch_latch" {
  key <BKSL> {[  ISO_Level3_Shift,  ISO_Level3_Shift,  ISO_Level3_Latch  ],
                 type[group1]="THREE_LEVEL" };
};

// The Less/Greater key (while pressed) chooses the third shift level,
// and latches when pressed together with another third-level chooser.
partial modifier_keys
xkb_symbols "lsgt_switch_latch" {
  key <LSGT> {[  ISO_Level3_Shift,  ISO_Level3_Shift,  ISO_Level3_Latch  ],
                 type[group1]="THREE_LEVEL" };
};

// Top-row digit key 4 chooses third shift level when pressed alone.
partial modifier_keys
xkb_symbols "4_switch_isolated" {
  override key <AE04> {[  ISO_Level3_Shift  ]};
};

// Top-row digit key 9 chooses third shift level when pressed alone.
partial modifier_keys
xkb_symbols "9_switch_isolated" {
  override key <AE09> {[  ISO_Level3_Shift  ]};
};