As suggested by @cornfeedhobo, adding support for alternative keyboard layouts.

Slightly reworked, it puts the definitions in a separate header file and uses the
preprocessor for the remapping.

Author: Hrvoje Cavrak

src/include/keyboard_layouts.h

@@ -0,0 +1,72 @@
+/* ==================================================== *
+ * Map hotkeys to alternative layouts
+ * ==================================================== */
+
+/* DVORAK */
+#define DVORAK_HID_KEY_A HID_KEY_A
+#define DVORAK_HID_KEY_B HID_KEY_N
+#define DVORAK_HID_KEY_C HID_KEY_I
+#define DVORAK_HID_KEY_D HID_KEY_H
+#define DVORAK_HID_KEY_E HID_KEY_D
+#define DVORAK_HID_KEY_F HID_KEY_Y
+#define DVORAK_HID_KEY_G HID_KEY_U
+#define DVORAK_HID_KEY_H HID_KEY_J
+#define DVORAK_HID_KEY_I HID_KEY_G
+#define DVORAK_HID_KEY_J HID_KEY_C
+#define DVORAK_HID_KEY_K HID_KEY_V
+#define DVORAK_HID_KEY_L HID_KEY_P
+#define DVORAK_HID_KEY_M HID_KEY_M
+#define DVORAK_HID_KEY_N HID_KEY_L
+#define DVORAK_HID_KEY_O HID_KEY_S
+#define DVORAK_HID_KEY_P HID_KEY_R
+#define DVORAK_HID_KEY_Q HID_KEY_X
+#define DVORAK_HID_KEY_R HID_KEY_O
+#define DVORAK_HID_KEY_S HID_KEY_SEMICOLON
+#define DVORAK_HID_KEY_T HID_KEY_K
+#define DVORAK_HID_KEY_U HID_KEY_F
+#define DVORAK_HID_KEY_V HID_KEY_PERIOD
+#define DVORAK_HID_KEY_W HID_KEY_COMMA
+#define DVORAK_HID_KEY_X HID_KEY_B
+#define DVORAK_HID_KEY_Y HID_KEY_T
+#define DVORAK_HID_KEY_Z HID_KEY_SLASH
+
+/* COLEMAK */
+#define COLEMAK_HID_KEY_A HID_KEY_A
+#define COLEMAK_HID_KEY_B HID_KEY_B
+#define COLEMAK_HID_KEY_C HID_KEY_C
+#define COLEMAK_HID_KEY_D HID_KEY_G
+#define COLEMAK_HID_KEY_E HID_KEY_K
+#define COLEMAK_HID_KEY_F HID_KEY_E
+#define COLEMAK_HID_KEY_G HID_KEY_T
+#define COLEMAK_HID_KEY_H HID_KEY_H
+#define COLEMAK_HID_KEY_I HID_KEY_L
+#define COLEMAK_HID_KEY_J HID_KEY_Y
+#define COLEMAK_HID_KEY_K HID_KEY_N
+#define COLEMAK_HID_KEY_L HID_KEY_U
+#define COLEMAK_HID_KEY_M HID_KEY_M
+#define COLEMAK_HID_KEY_N HID_KEY_J
+#define COLEMAK_HID_KEY_O HID_KEY_SEMICOLON
+#define COLEMAK_HID_KEY_P HID_KEY_R
+#define COLEMAK_HID_KEY_Q HID_KEY_Q
+#define COLEMAK_HID_KEY_R HID_KEY_S
+#define COLEMAK_HID_KEY_S HID_KEY_D
+#define COLEMAK_HID_KEY_T HID_KEY_F
+#define COLEMAK_HID_KEY_U HID_KEY_I
+#define COLEMAK_HID_KEY_V HID_KEY_V
+#define COLEMAK_HID_KEY_W HID_KEY_W
+#define COLEMAK_HID_KEY_X HID_KEY_X
+#define COLEMAK_HID_KEY_Y HID_KEY_O
+#define COLEMAK_HID_KEY_Z HID_KEY_Z
+
+/* QWERTY needs no change */
+#if KEYBOARD_LAYOUT == 0
+#define KBD_REMAP(key) key
+
+/* For DVORAK we prepend DVORAK_ and reference the definitions above */
+#elif KEYBOARD_LAYOUT == 1
+#define KBD_REMAP(key) DVORAK_##key
+
+/* For COLEMAK we prepend COLEMAK_ and reference the definitions above */
+#elif KEYBOARD_LAYOUT == 2
+#define KBD_REMAP(key) COLEMAK_##key
+#endif