[recipes] Add unexport api too

[Matthias Clasen <matthiasc src gnome org>]

commit 76606f2f6ea6a3929cab744c5b66c46ccb67cb18
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Feb 14 18:43:45 2017 -0500

    Add unexport api too
    
    Under wayland, it is necessary to explicitly unexport handles.

 src/gr-utils.c |   15 ++++++++++++++-
 src/gr-utils.h |    3 +++
 2 files changed, 17 insertions(+), 1 deletions(-)
---
diff --git a/src/gr-utils.c b/src/gr-utils.c
index a1b7e60..30038bb 100644
--- a/src/gr-utils.c
+++ b/src/gr-utils.c
@@ -25,6 +25,7 @@
 #include <sys/stat.h>
 
 #include <glib/gi18n.h>
+#include <gtk/gtk.h>
 
 #ifdef GDK_WINDOWING_X11
 #include <gdk/gdkx.h>
@@ -567,7 +568,7 @@ wayland_window_handle_exported (GdkWindow  *window,
 }
 #endif
 
-static gboolean
+gboolean
 window_export_handle (GtkWindow            *window,
                       WindowHandleExported  callback,
                       gpointer              user_data)
@@ -613,3 +614,15 @@ window_export_handle (GtkWindow            *window,
         return FALSE;
 }
 
+void
+window_unexport_handle (GtkWindow *window)
+{
+#ifdef GDK_WINDOWING_WAYLAND
+  if (GDK_IS_WAYLAND_DISPLAY (gtk_widget_get_display (GTK_WIDGET (window))))
+    {
+      GdkWindow *gdk_window = gtk_widget_get_window (GTK_WIDGET (window));
+
+      gdk_wayland_window_unexport_handle (gdk_window);
+    }
+#endif
+}
diff --git a/src/gr-utils.h b/src/gr-utils.h
index 6c0a8f3..48be8dc 100644
--- a/src/gr-utils.h
+++ b/src/gr-utils.h
@@ -76,3 +76,6 @@ gboolean
 window_export_handle (GtkWindow            *window,
                       WindowHandleExported  callback,
                       gpointer              user_data);
+
+void
+window_unexport_handle (GtkWindow *window);