[gtk/clipboard-test] Fix clipboard tests under xvfb

[Matthias Clasen <matthiasc src gnome org>]

commit e7dc3674d2916635dceacb19981c5f4a557e925c
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Apr 26 22:16:54 2021 -0400

    Fix clipboard tests under xvfb

 testsuite/gdk/clipboard-client.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)
---
diff --git a/testsuite/gdk/clipboard-client.c b/testsuite/gdk/clipboard-client.c
index 88ae607358..b7f70d4912 100644
--- a/testsuite/gdk/clipboard-client.c
+++ b/testsuite/gdk/clipboard-client.c
@@ -1,5 +1,9 @@
 #include <gtk/gtk.h>
 
+#ifdef GDK_WINDOWING_WAYLAND
+#include "wayland/gdkwayland.h"
+#endif
+
 static void
 got_text_cb (GObject      *source,
              GAsyncResult *result,
@@ -177,11 +181,19 @@ main (int argc, char *argv[])
 
   gtk_init ();
 
-  window = gtk_window_new ();
-
-  gtk_window_present (GTK_WINDOW (window));
-
-  g_signal_connect (window, "notify::is-active", G_CALLBACK (do_it), NULL);
+  /* Don't wait for a window manager to give us focus when
+   * we may be running on bare wm-less X.
+   */
+#ifdef GDK_WINDOWING_WAYLAND
+  if (GDK_IS_WAYLAND_DISPLAY (gdk_display_get_default ()))
+    {
+      window = gtk_window_new ();
+      gtk_window_present (GTK_WINDOW (window));
+      g_signal_connect (window, "notify::is-active", G_CALLBACK (do_it), NULL);
+    }
+  else
+#endif
+    do_it (NULL, NULL);
 
   while (!done)
     g_main_context_iteration (NULL, TRUE);