Prevent duplicate workspace::focus events

Previously we would compare the last focus's workspace with the new
focus's workspace to determine if we need to emit an IPC
workspace::focus event. This doesn't work when moving the focused
container to a new workspace.

This adds a workspace property to the seat which stores the last emitted
workspace::focus workspace. Using this method, after moving the
container, refocusing it will trigger exactly one workspace::focus
event: from the old workspace to the new workspace.

1 files changed, 1 insertions, 0 deletions

diff --git a/include/sway/input/seat.h b/include/sway/input/seat.h
index 921373d4..be95567e 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;
 
         // If the focused layer is set, views cannot receive keyboard focus
         struct wlr_layer_surface_v1 *focused_layer;