wayland: Make GdkWaylandWindow public

Allows to access Wayland specific window information like wl_surface and
wl_shell_surface.

Add gdk_wayland_window_get_wl_surface for getting the Wayland wl_surface
and gdk_wayland_window_get_wl_shell_surface for getting the Wayland
wl_shell_surface.

gdk/wayland/gdkwaylandwindow.h

@@ -0,0 +1,52 @@
+/* GDK - The GIMP Drawing Kit
+ * Copyright (C) 2013 Jan Arne Petersen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GDK_WAYLAND_WINDOW_H__
+#define __GDK_WAYLAND_WINDOW_H__
+
+#if !defined (__GDKWAYLAND_H_INSIDE__) && !defined (GDK_COMPILATION)
+#error "Only <gdk/gdkwayland.h> can be included directly."
+#endif
+
+#include <gdk/gdk.h>
+
+#include <wayland-client.h>
+
+G_BEGIN_DECLS
+
+#ifdef GDK_COMPILATION
+typedef struct _GdkWaylandWindow GdkWaylandWindow;
+#else
+typedef GdkWindow GdkWaylandWindow;
+#endif
+typedef struct _GdkWaylandWindowClass GdkWaylandWindowClass;
+
+#define GDK_TYPE_WAYLAND_WINDOW              (gdk_wayland_window_get_type())
+#define GDK_WAYLAND_WINDOW(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_WAYLAND_WINDOW, GdkWaylandWindow))
+#define GDK_WAYLAND_WINDOW_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_WAYLAND_WINDOW, GdkWaylandWindowClass))
+#define GDK_IS_WAYLAND_WINDOW(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_WAYLAND_WINDOW))
+#define GDK_IS_WAYLAND_WINDOW_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_WAYLAND_WINDOW))
+#define GDK_WAYLAND_WINDOW_GET_CLASS(obj)    (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_WAYLAND_WINDOW, GdkWaylandWindowClass))
+
+GType                    gdk_wayland_window_get_type             (void);
+
+struct wl_surface       *gdk_wayland_window_get_wl_surface       (GdkWindow *window);
+struct wl_shell_surface *gdk_wayland_window_get_wl_shell_surface (GdkWindow *window);
+
+G_END_DECLS
+
+#endif /* __GDK_WAYLAND_WINDOW_H__ */