destroy old client popups when focusing another client

Closes: https://github.com/djpohly/dwl/issues/408

dwl.c

@@ -1203,7 +1203,9 @@ void
 focusclient(Client *c, int lift)
 {
 	struct wlr_surface *old = seat->keyboard_state.focused_surface;
-	int i, unused_lx, unused_ly;
+	int i, unused_lx, unused_ly, old_client_type;
+	Client *old_c = NULL;
+	LayerSurface *old_l = NULL;
 
 	if (locked)
 		return;
@@ -1215,6 +1217,12 @@ focusclient(Client *c, int lift)
 	if (c && client_surface(c) == old)
 		return;
 
+	if ((old_client_type = toplevel_from_wlr_surface(old, &old_c, &old_l)) == XDGShell) {
+		struct wlr_xdg_popup *popup, *tmp;
+		wl_list_for_each_safe(popup, tmp, &old_c->surface.xdg->popups, link)
+			wlr_xdg_popup_destroy(popup);
+	}
+
 	/* Put the new client atop the focus stack and select its monitor */
 	if (c && !client_is_unmanaged(c)) {
 		wl_list_remove(&c->flink);
@@ -1235,19 +1243,17 @@ focusclient(Client *c, int lift)
 		/* If an overlay is focused, don't focus or activate the client,
 		 * but only update its position in fstack to render its border with focuscolor
 		 * and focus it after the overlay is closed. */
-		Client *w = NULL;
-		LayerSurface *l = NULL;
-		int type = toplevel_from_wlr_surface(old, &w, &l);
-		if (type == LayerShell && wlr_scene_node_coords(&l->scene->node, &unused_lx, &unused_ly)
-				&& l->layer_surface->current.layer >= ZWLR_LAYER_SHELL_V1_LAYER_TOP) {
+		if (old_client_type == LayerShell && wlr_scene_node_coords(
+					&old_l->scene->node, &unused_lx, &unused_ly)
+				&& old_l->layer_surface->current.layer >= ZWLR_LAYER_SHELL_V1_LAYER_TOP) {
 			return;
-		} else if (w && w == exclusive_focus && client_wants_focus(w)) {
+		} else if (old_c && old_c == exclusive_focus && client_wants_focus(old_c)) {
 			return;
 		/* Don't deactivate old client if the new one wants focus, as this causes issues with winecfg
 		 * and probably other clients */
-		} else if (w && !client_is_unmanaged(w) && (!c || !client_wants_focus(c))) {
+		} else if (old_c && !client_is_unmanaged(old_c) && (!c || !client_wants_focus(c))) {
 			for (i = 0; i < 4; i++)
-				wlr_scene_rect_set_color(w->border[i], bordercolor);
+				wlr_scene_rect_set_color(old_c->border[i], bordercolor);
 
 			client_activate_surface(old, 0);
 		}