[epiphany] wrap libwnck code so it runs only on X11

[Claudio Saavedra <csaavedra src gnome org>]

commit d10f7619c584241abb9a5280433e1b4740a21c82
Author: Armin K <krejzi email com>
Date:   Thu Nov 21 14:14:33 2013 +0100

    wrap libwnck code so it runs only on X11
    
    This is necessary to use Epiphany on Weston, the
    Wayland compositor without having to run XWayland.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=708955

 src/ephy-shell.c  |    4 +++-
 src/ephy-window.c |    6 +++++-
 2 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/src/ephy-shell.c b/src/ephy-shell.c
index 5fd9d3d..3b2fc3f 100644
--- a/src/ephy-shell.c
+++ b/src/ephy-shell.c
@@ -46,6 +46,7 @@
 #include "window-commands.h"
 
 #include <glib/gi18n.h>
+#include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 
 #define WNCK_I_KNOW_THIS_IS_UNSTABLE
@@ -139,7 +140,8 @@ ephy_shell_startup_continue (EphyShell *shell)
    * otherwise our first call to ephy_window_is_on_current_workspace
    * will be unreliable.
    */
-  wnck_screen_force_update (wnck_screen_get_default ());
+  if (GDK_IS_X11_DISPLAY (gdk_display_get_default ()))
+    wnck_screen_force_update (wnck_screen_get_default ());
 }
 
 static void
diff --git a/src/ephy-window.c b/src/ephy-window.c
index da662ab..e67d388 100644
--- a/src/ephy-window.c
+++ b/src/ephy-window.c
@@ -4413,6 +4413,11 @@ ephy_window_is_on_current_workspace (EphyWindow *window)
        if (!gtk_widget_get_realized (GTK_WIDGET (window)))
                return TRUE;
 
+       gdk_window = gtk_widget_get_window (GTK_WIDGET (window));
+
+       if(!GDK_IS_X11_WINDOW (gdk_window))
+               return TRUE;
+
        workspace = wnck_screen_get_active_workspace (wnck_screen_get_default ());
 
        /* From WNCK docs:
@@ -4423,7 +4428,6 @@ ephy_window_is_on_current_workspace (EphyWindow *window)
        if (!workspace)
                return TRUE;
 
-       gdk_window = gtk_widget_get_window (GTK_WIDGET (window));
        wnck_window = wnck_window_get (GDK_WINDOW_XID (gdk_window));
 
        return wnck_window_is_on_workspace (wnck_window, workspace);