refactor(events): return 'ZMK_EV_EVENT_BUBBLE' instead of magic number 0

app/include/zmk/event_manager.h

@@ -19,6 +19,7 @@ struct zmk_event_header {
     uint8_t last_listener_index;
 };
 
+#define ZMK_EV_EVENT_BUBBLE 0
 #define ZMK_EV_EVENT_HANDLED 1
 #define ZMK_EV_EVENT_CAPTURED 2
 

app/src/behaviors/behavior_hold_tap.c

@@ -392,16 +392,16 @@ static int position_state_changed_listener(const struct zmk_event_header *eh) {
 
     if (undecided_hold_tap == NULL) {
         LOG_DBG("%d bubble (no undecided hold_tap active)", ev->position);
-        return 0;
+        return ZMK_EV_EVENT_BUBBLE;
     }
 
     if (undecided_hold_tap->position == ev->position) {
         if (ev->state) { // keydown
             LOG_ERR("hold-tap listener should be called before before most other listeners!");
-            return 0;
+            return ZMK_EV_EVENT_BUBBLE;
         } else { // keyup
             LOG_DBG("%d bubble undecided hold-tap keyrelease event", undecided_hold_tap->position);
-            return 0;
+            return ZMK_EV_EVENT_BUBBLE;
         }
     }
 
@@ -418,7 +418,7 @@ static int position_state_changed_listener(const struct zmk_event_header *eh) {
         // we'll catch modifiers later in modifier_state_changed_listener
         LOG_DBG("%d bubbling %d %s event", undecided_hold_tap->position, ev->position,
                 ev->state ? "down" : "up");
-        return 0;
+        return ZMK_EV_EVENT_BUBBLE;
     }
 
     LOG_DBG("%d capturing %d %s event", undecided_hold_tap->position, ev->position,
@@ -439,12 +439,12 @@ static int keycode_state_changed_listener(const struct zmk_event_header *eh) {
 
     if (undecided_hold_tap == NULL) {
         // LOG_DBG("0x%02X bubble (no undecided hold_tap active)", ev->keycode);
-        return 0;
+        return ZMK_EV_EVENT_BUBBLE;
     }
 
     if (!only_mods(ev)) {
         // LOG_DBG("0x%02X bubble (not a mod)", ev->keycode);
-        return 0;
+        return ZMK_EV_EVENT_BUBBLE;
     }
 
     // only key-up events will bubble through position_state_changed_listener
@@ -461,7 +461,7 @@ int behavior_hold_tap_listener(const struct zmk_event_header *eh) {
     } else if (is_keycode_state_changed(eh)) {
         return keycode_state_changed_listener(eh);
     }
-    return 0;
+    return ZMK_EV_EVENT_BUBBLE;
 }
 
 ZMK_LISTENER(behavior_hold_tap, behavior_hold_tap_listener);

app/src/behaviors/behavior_sticky_key.c

@@ -177,7 +177,7 @@ static const struct behavior_driver_api behavior_sticky_key_driver_api = {
 
 static int sticky_key_keycode_state_changed_listener(const struct zmk_event_header *eh) {
     if (!is_keycode_state_changed(eh)) {
-        return 0;
+        return ZMK_EV_EVENT_BUBBLE;
     }
     struct keycode_state_changed *ev = cast_keycode_state_changed(eh);
     for (int i = 0; i < ZMK_BHV_STICKY_KEY_MAX_HELD; i++) {
@@ -222,7 +222,7 @@ static int sticky_key_keycode_state_changed_listener(const struct zmk_event_head
             }
         }
     }
-    return 0;
+    return ZMK_EV_EVENT_BUBBLE;
 }
 
 ZMK_LISTENER(behavior_sticky_key, sticky_key_keycode_state_changed_listener);

app/src/display/widgets/battery_status.c

@@ -78,7 +78,7 @@ lv_obj_t *zmk_widget_battery_status_obj(struct zmk_widget_battery_status *widget
 int battery_status_listener(const struct zmk_event_header *eh) {
     struct zmk_widget_battery_status *widget;
     SYS_SLIST_FOR_EACH_CONTAINER(&widgets, widget, node) { set_battery_symbol(widget->obj); }
-    return 0;
+    return ZMK_EV_EVENT_BUBBLE;
 }
 
 ZMK_LISTENER(widget_battery_status, battery_status_listener)

app/src/display/widgets/output_status.c

@@ -82,7 +82,7 @@ lv_obj_t *zmk_widget_output_status_obj(struct zmk_widget_output_status *widget)
 int output_status_listener(const struct zmk_event_header *eh) {
     struct zmk_widget_output_status *widget;
     SYS_SLIST_FOR_EACH_CONTAINER(&widgets, widget, node) { set_status_symbol(widget->obj); }
-    return 0;
+    return ZMK_EV_EVENT_BUBBLE;
 }
 
 ZMK_LISTENER(widget_output_status, output_status_listener)

app/src/split_listener.c

@@ -29,7 +29,7 @@ int split_listener(const struct zmk_event_header *eh) {
             return zmk_split_bt_position_released(ev->position);
         }
     }
-    return 0;
+    return ZMK_EV_EVENT_BUBBLE;
 }
 
 ZMK_LISTENER(split_listener, split_listener);