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).

2 files changed, 1 insertions, 2 deletions

diff --git a/include/sway/input/seat.h b/include/sway/input/seat.h
index ef65810c..bef2af77 100644
--- a/include/sway/input/seat.h
+++ b/include/sway/input/seat.h
@@ -51,6 +51,7 @@ struct sway_seat {
 	bool has_focus;
 	struct wl_list focus_stack; // list of containers in focus order
 	struct sway_workspace *workspace;
+	char *prev_workspace_name; // for workspace back_and_forth
 
 	// If the focused layer is set, views cannot receive keyboard focus
 	struct wlr_layer_surface_v1 *focused_layer;
diff --git a/include/sway/tree/workspace.h b/include/sway/tree/workspace.h
index efdae5a1..b5ae92f3 100644
--- a/include/sway/tree/workspace.h
+++ b/include/sway/tree/workspace.h
@@ -45,8 +45,6 @@ struct sway_workspace {
 	struct sway_workspace_state current;
 };
 
-extern char *prev_workspace_name;
-
 struct workspace_config *workspace_find_config(const char *ws_name);
 
 struct sway_output *workspace_get_initial_output(const char *name);