Vim key nav

keymap/keymap.c

@@ -247,8 +247,67 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
                 return false;
             }
         default:
-            return true; //Process all other keycodes normally
+            break; //Process all other keycodes normally
     }
+
+    if (keycode == KC_LGUI) {
+        if (record->event.pressed && !gui_key_down) {
+            gui_key_down = true;
+        } else if (!record->event.pressed && gui_key_down) {
+            if (gui_combo_pressed) {
+                unregister_code(KC_LGUI);
+            } else if (!gui_disable_tap) {
+                tap_code(KC_LGUI);
+            }
+
+            gui_key_down = false;
+            gui_combo_pressed = false;
+            gui_disable_tap = false;
+        }
+        return false;
+    }
+
+    if (!gui_key_down){
+        return true;
+    }
+
+    // Vim keys
+    if(!gui_combo_pressed) {
+        uint16_t target = 0;
+
+        if(keycode == KC_H){
+            target = KC_LEFT;
+        }
+
+        if(keycode == KC_J){
+            target = KC_DOWN;
+        }
+
+        if(keycode == KC_K){
+            target = KC_UP;
+        }
+
+        if(keycode == KC_L){
+            target = KC_RIGHT;
+        }
+
+        if (target != 0) {
+            if(record->event.pressed) {
+                register_code(target);
+                gui_disable_tap = true;
+            } else {
+                unregister_code(target);
+            }
+            return false;
+        }
+    }
+
+    if(!gui_combo_pressed) {
+        gui_combo_pressed = true;
+        register_code(KC_LGUI);
+    }
+
+    return true;
 }
 
 void set_layer_color(int layer) {

keymap/keymap.h

@@ -29,3 +29,7 @@ enum layout_names {
 extern bool g_suspend_state;
 extern rgb_config_t rgb_matrix_config;
 bool disable_layer_color;
+
+bool gui_key_down;
+bool gui_combo_pressed;
+bool gui_disable_tap;