Make workspace back_and_forth seat-specific

* When using multiple seats, each seat has its own prev_workspace_name
for the purpose of workspace back_and_forth.
* Removes prev_workspace_name global variable.
* Removes unused next_name_map function in tree/workspace.c.
* Fixes memory leak in seat_destroy (seat was not freed).

1 files changed, 2 insertions, 0 deletions

diff --git a/sway/input/seat.c b/sway/input/seat.c
index 2e352b19..16acc8a5 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -51,6 +51,8 @@ void seat_destroy(struct sway_seat *seat) {
         wl_list_remove(&seat->new_drag_icon.link);
         wl_list_remove(&seat->link);
         wlr_seat_destroy(seat->wlr_seat);
+        free(seat->prev_workspace_name);
+        free(seat);
 }
 
 static struct sway_seat_node *seat_node_from_node(