Home-row mods with rollover prevention

flmng0 · Oct 10, 2023 · dfb83a8 · dfb83a8
1 parent 44409c4
commit dfb83a8
Show file tree

Hide file tree

Showing 3 changed files with 56 additions and 8 deletions.
diff --git a/flmng0.c b/flmng0.c
@@ -8,17 +8,17 @@
  *
  * Open on left hand, close on right hand.
  */
-const uint16_t PROGMEM c_lparen[] = {KC_T, BM_D, COMBO_END};
-const uint16_t PROGMEM c_rparen[] = {KC_N, BM_H, COMBO_END};
+const uint16_t PROGMEM c_lparen[] = {HM_T, KC_D, COMBO_END};
+const uint16_t PROGMEM c_rparen[] = {HM_N, KC_H, COMBO_END};
 
-const uint16_t PROGMEM c_lbracket[] = {KC_S, BM_C, COMBO_END};
-const uint16_t PROGMEM c_rbracket[] = {KC_E, BM_COMM, COMBO_END};
+const uint16_t PROGMEM c_lbracket[] = {HM_S, KC_C, COMBO_END};
+const uint16_t PROGMEM c_rbracket[] = {HM_E, KC_COMM, COMBO_END};
 
 const uint16_t PROGMEM c_lbrace[] = {KC_G, KC_V, COMBO_END};
 const uint16_t PROGMEM c_rbrace[] = {KC_M, KC_K, COMBO_END};
 
-const uint16_t PROGMEM c_langle[] = {KC_R, BM_X, COMBO_END};
-const uint16_t PROGMEM c_rangle[] = {KC_I, BM_DOT, COMBO_END};
+const uint16_t PROGMEM c_langle[] = {HM_R, KC_X, COMBO_END};
+const uint16_t PROGMEM c_rangle[] = {HM_I, KC_DOT, COMBO_END};
 
 /**
  * Common symbols.
@@ -88,3 +88,33 @@ bool caps_word_press_user(uint16_t keycode) {
   }
 }
 
+#define ROLLOVER(kca, kcb, modded_b, mod_a) \
+  case modded_b: \
+    if (record->event.pressed && record->tap.count > 0) { \
+      if (mods & MOD_BIT(mod_a)) { \
+        unregister_mods(MOD_BIT(mod_a)); \
+        tap_code(kca); \
+        tap_code(kcb); \
+        add_mods(MOD_BIT(mod_a)); \
+        return false; \
+      } \
+    } \
+    return true;
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  uint8_t mods = get_mods();
+
+  switch (keycode) {
+    ROLLOVER(KC_A, KC_R, HM_R, KC_LGUI);
+    ROLLOVER(KC_R, KC_S, HM_S, KC_LALT);
+    ROLLOVER(KC_S, KC_T, HM_T, KC_LSFT);
+    ROLLOVER(KC_T, KC_G, KC_G, KC_LCTL);
+
+    ROLLOVER(KC_N, KC_M, KC_M, KC_RCTL);
+    ROLLOVER(KC_E, KC_N, HM_N, KC_RSFT);
+    ROLLOVER(KC_I, KC_E, HM_E, KC_LALT);
+    ROLLOVER(KC_O, KC_I, HM_I, KC_RGUI);
+  }
+
+  return true;
+}
diff --git a/keymaps/combo.json b/keymaps/combo.json
@@ -6,7 +6,7 @@
   "keymap": "flmng0",
   "layout": "LAYOUT_a_dux_wrap",
   "layers": [
-    [ "_BASE" ],
+    [ "_BASE_HRM" ],
     [ "_NAV" ],
     [ "_SYM" ],
     [ "_NUM" ],

diff --git a/layout.h b/layout.h
@@ -29,7 +29,25 @@
 #define BM_DOT  LALT_T(KC_DOT)
 #define BM_QUOT RGUI_T(KC_QUOT)
 
-#define _BASE \
+
+#define HM_A LGUI_T(KC_A)
+#define HM_R LALT_T(KC_R)
+#define HM_S LSFT_T(KC_S)
+#define HM_T LCTL_T(KC_T)
+
+#define HM_N RCTL_T(KC_N)
+#define HM_E RSFT_T(KC_E)
+#define HM_I LALT_T(KC_I)
+#define HM_O RGUI_T(KC_O)
+
+
+#define _BASE_HRM \
+  KC_Q   , KC_W   , KC_F   , KC_P   , KC_B   , KC_J   , KC_L   , KC_U   , KC_Y   , KC_SCLN, \
+  HM_A   , HM_R   , HM_S   , HM_T   , KC_G   , KC_M   , HM_N   , HM_E   , HM_I   , HM_O   , \
+  KC_Z   , KC_X   , KC_C   , KC_D   , KC_V   , KC_K   , KC_H   , KC_COMM, KC_DOT , KC_QUOT, \
+                             L_NUM  , L_NAV  , L_SYM  , KC_BSPC
+
+#define _BASE_BRM \
   KC_Q   , KC_W   , KC_F   , KC_P   , KC_B   , KC_J   , KC_L   , KC_U   , KC_Y   , KC_SCLN, \
   KC_A   , KC_R   , KC_S   , KC_T   , KC_G   , KC_M   , KC_N   , KC_E   , KC_I   , KC_O   , \
   BM_Z   , BM_X   , BM_C   , BM_D   , KC_V   , KC_K   , BM_H   , BM_COMM, BM_DOT , BM_QUOT, \