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, 2 deletions

diff --git a/sway/tree/view.c b/sway/tree/view.c
index 85afbb87..b23afb97 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -465,8 +465,8 @@ static struct sway_workspace *select_workspace(struct sway_view *view) {
 
                         if (!ws) {
                                 if (strcasecmp(criteria->target, "back_and_forth") == 0) {
-                                        if (prev_workspace_name) {
-                                                ws = workspace_create(NULL, prev_workspace_name);
+                                        if (seat->prev_workspace_name) {
+                                                ws = workspace_create(NULL, seat->prev_workspace_name);
                                         }
                                 } else {
                                         ws = workspace_create(NULL, criteria->target);