tablet-shell: Use seat_list rather than primary seat

Activate surfaces for all seats when showing the grid, not just the
primary seat.

Signed-off-by: Daniel Stone <daniel@fooishbar.org>

src/tablet-shell.c

@@ -240,9 +240,10 @@ minimize_zoom_done(struct weston_zoom *zoom, void *data)
 {
 	struct tablet_shell *shell = data;
 	struct weston_compositor *compositor = shell->compositor;
-	struct weston_seat *seat = (struct weston_seat *) compositor->seat;
+	struct weston_seat *seat;
 
-	weston_surface_activate(shell->home_surface, seat);
+	wl_list_for_each(seat, &compositor->seat_list, link)
+		weston_surface_activate(shell->home_surface, seat);
 }
 
 static void
@@ -250,7 +251,7 @@ tablet_shell_switch_to(struct tablet_shell *shell,
 			     struct weston_surface *surface)
 {
 	struct weston_compositor *compositor = shell->compositor;
-	struct weston_seat *seat = (struct weston_seat *) compositor->seat;
+	struct weston_seat *seat;
 	struct weston_surface *current;
 
 	if (shell->state == STATE_SWITCHER) {
@@ -268,7 +269,8 @@ tablet_shell_switch_to(struct tablet_shell *shell,
 		}
 	} else {
 		fprintf(stderr, "switch to %p\n", surface);
-		weston_surface_activate(surface, seat);
+		wl_list_for_each(seat, &compositor->seat_list, link)
+			weston_surface_activate(surface, seat);
 		tablet_shell_set_state(shell, STATE_TASK);
 		weston_zoom_run(surface, 0.3, 1.0, NULL, NULL);
 	}
@@ -423,11 +425,8 @@ tablet_shell_unlock(struct wl_listener *listener, void *data)
 }
 
 static void
-go_home(struct tablet_shell *shell)
+go_home(struct tablet_shell *shell, struct weston_seat *seat)
 {
-	struct weston_seat *seat =
-		(struct weston_seat *) shell->compositor->seat;
-
 	if (shell->state == STATE_SWITCHER)
 		tablet_shell_send_hide_switcher(&shell->resource);
 
@@ -482,7 +481,7 @@ home_key_binding(struct wl_seat *seat, uint32_t time,
 			toggle_switcher(shell);
 			break;
 		default:
-			go_home(shell);
+			go_home(shell, (struct weston_seat *) seat);
 			break;
 		}
 	}