Moved visibility check of of loop, added asserts

sway/input/cursor.c

@@ -167,10 +167,12 @@ void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
 			// If pointed container is in nested containers which are
 			// inside tabbed/stacked layout we should skip them
 			bool do_mouse_focus = true;
+			sway_assert(c->type == C_VIEW, "pointed container is not a view");
+			bool is_visible = view_is_visible(c->sway_view);
 			struct sway_container *p = c->parent;
 			while (p) {
 				if ((p->layout == L_TABBED || p->layout == L_STACKED)
-					&& !view_is_visible(c->sway_view)) {
+					&& !is_visible) {
 					do_mouse_focus = false;
 					break;
 				}
@@ -179,6 +181,8 @@ void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
 			if (!do_mouse_focus) {
 				struct sway_container *next_focus = seat_get_focus_inactive(
 						cursor->seat, p);
+				sway_assert(next_focus->type == C_VIEW,
+							"focus inactive container is not a view");
 				if (next_focus && view_is_visible(next_focus->sway_view)) {
 					seat_set_focus_warp(cursor->seat, next_focus, false);
 				}