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-rw-r--r--quantum/keycode_config.c44
1 files changed, 20 insertions, 24 deletions
diff --git a/quantum/keycode_config.c b/quantum/keycode_config.c
index 9dd7097c86..864488a65c 100644
--- a/quantum/keycode_config.c
+++ b/quantum/keycode_config.c
@@ -122,40 +122,36 @@ __attribute__((weak)) uint16_t keycode_config(uint16_t keycode) {
*/
__attribute__((weak)) uint8_t mod_config(uint8_t mod) {
+ /**
+ * Note: This function is for the 5-bit packed mods, NOT the full 8-bit mods.
+ * More info about the mods can be seen in modifiers.h.
+ */
if (keymap_config.swap_lalt_lgui) {
- if ((mod & MOD_RGUI) == MOD_LGUI) {
- mod &= ~MOD_LGUI;
- mod |= MOD_LALT;
- } else if ((mod & MOD_RALT) == MOD_LALT) {
- mod &= ~MOD_LALT;
- mod |= MOD_LGUI;
+ /** If both modifiers pressed or neither pressed, do nothing
+ * Otherwise swap the values
+ * Note: The left mods are ANDed with the right-hand values to check
+ * if they were pressed with the right hand bit set
+ */
+ if (((mod & MOD_RALT) == MOD_LALT) ^ ((mod & MOD_RGUI) == MOD_LGUI)) {
+ mod ^= (MOD_LALT | MOD_LGUI);
}
}
if (keymap_config.swap_ralt_rgui) {
- if ((mod & MOD_RGUI) == MOD_RGUI) {
- mod &= ~MOD_RGUI;
- mod |= MOD_RALT;
- } else if ((mod & MOD_RALT) == MOD_RALT) {
- mod &= ~MOD_RALT;
- mod |= MOD_RGUI;
+ if (((mod & MOD_RALT) == MOD_RALT) ^ ((mod & MOD_RGUI) == MOD_RGUI)) {
+ /* lefthand values to preserve the right hand bit */
+ mod ^= (MOD_LALT | MOD_LGUI);
}
}
if (keymap_config.swap_lctl_lgui) {
- if ((mod & MOD_RGUI) == MOD_LGUI) {
- mod &= ~MOD_LGUI;
- mod |= MOD_LCTL;
- } else if ((mod & MOD_RCTL) == MOD_LCTL) {
- mod &= ~MOD_LCTL;
- mod |= MOD_LGUI;
+ /* left mods ANDed with right-hand values to check for right hand bit */
+ if (((mod & MOD_RCTL) == MOD_LCTL) ^ ((mod & MOD_RGUI) == MOD_LGUI)) {
+ mod ^= (MOD_LCTL | MOD_LGUI);
}
}
if (keymap_config.swap_rctl_rgui) {
- if ((mod & MOD_RGUI) == MOD_RGUI) {
- mod &= ~MOD_RGUI;
- mod |= MOD_RCTL;
- } else if ((mod & MOD_RCTL) == MOD_RCTL) {
- mod &= ~MOD_RCTL;
- mod |= MOD_RGUI;
+ if (((mod & MOD_RCTL) == MOD_RCTL) ^ ((mod & MOD_RGUI) == MOD_RGUI)) {
+ /* lefthand values to preserve the right hand bit */
+ mod ^= (MOD_LCTL | MOD_LGUI);
}
}
if (keymap_config.no_gui) {