seat focus inactive children foreach

include/sway/input/seat.h

@@ -94,6 +94,13 @@ struct sway_container *seat_get_focus_inactive(struct sway_seat *seat,
 struct sway_container *seat_get_focus_inactive_view(struct sway_seat *seat,
 		struct sway_container *container);
 
+/**
+ * Iterate over the focus-inactive children of the container calling the function on each.
+ */
+void seat_focus_inactive_children_for_each(struct sway_seat *seat,
+		struct sway_container *container,
+		void (*f)(struct sway_container *container, void *data), void *data);
+
 void seat_apply_config(struct sway_seat *seat, struct seat_config *seat_config);
 
 struct seat_config *seat_get_config(struct sway_seat *seat);

sway/input/seat.c

@@ -106,6 +106,20 @@ static struct sway_container *seat_get_focus_by_type(struct sway_seat *seat,
 	return NULL;
 }
 
+void seat_focus_inactive_children_for_each(struct sway_seat *seat,
+		struct sway_container *container,
+		void (*f)(struct sway_container *container, void *data), void *data) {
+	struct sway_seat_container *current = NULL;
+	wl_list_for_each(current, &seat->focus_stack, link) {
+		if (current->container->parent == NULL) {
+			continue;
+		}
+		if (current->container->parent == container) {
+			f(current->container, data);
+		}
+	}
+}
+
 struct sway_container *seat_get_focus_inactive_view(struct sway_seat *seat,
 		struct sway_container *container) {
 	return seat_get_focus_by_type(seat, container, C_VIEW);