Fix scratchpad segfault - NULL focused workspace

When adding a container to the scratchpad, it was possible for focus to
be removed from the seat. This occurred when a single child was moved
from it's parent to the scratchpad due to the focus_inactive for the
parent being NULL. If the focus_inactive for the parent is NULL, the
focus_inactive for the workspace should be focused.

1 files changed, 6 insertions, 3 deletions

diff --git a/sway/tree/root.c b/sway/tree/root.c
index 9f6bf607..22c46aba 100644
--- a/sway/tree/root.c
+++ b/sway/tree/root.c
@@ -69,13 +69,16 @@ void root_scratchpad_add_container(struct sway_container *con) {
         list_add(root->scratchpad, con);
 
         struct sway_seat *seat = input_manager_current_seat();
+        struct sway_node *new_focus = NULL;
         if (parent) {
                 arrange_container(parent);
-                seat_set_focus(seat, seat_get_focus_inactive(seat, &parent->node));
-        } else {
+                new_focus = seat_get_focus_inactive(seat, &parent->node);
+        }
+        if (!new_focus) {
                 arrange_workspace(workspace);
-                seat_set_focus(seat, seat_get_focus_inactive(seat, &workspace->node));
+                new_focus = seat_get_focus_inactive(seat, &workspace->node);
         }
+        seat_set_focus(seat, new_focus);
 
         ipc_event_window(con, "move");
 }