diff -u hornsey-1.5.1/debian/changelog hornsey-1.5.1/debian/changelog
--- hornsey-1.5.1/debian/changelog
+++ hornsey-1.5.1/debian/changelog
@@ -1,3 +1,9 @@
+hornsey (1.5.1-1ubuntu1) lucid; urgency=low
+
+  * src/hrn-window.c: If F11 is pressed, toggle fullscreen (LP: #523851)
+
+ -- Michael Terry <michael.terry@canonical.com>  Wed, 17 Feb 2010 15:40:41 -0500
+
 hornsey (1.5.1-1) unstable; urgency=low
 
   * Initial release. (Closes: #565151)
only in patch2:
unchanged:
--- hornsey-1.5.1.orig/src/hrn-window.c
+++ hornsey-1.5.1/src/hrn-window.c
@@ -14,6 +14,8 @@
     GtkClutterEmbed *embed;
     ClutterActor *internal;
     HrnStateManager *state_manager;
+    int orig_width;
+    int orig_height;
 };
 
 #define GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), HRN_TYPE_WINDOW, HrnWindowPrivate))
@@ -68,6 +70,10 @@
         hrn_quit ();
         return TRUE;
     }
+    else if (event->keyval == GDK_F11) {
+        hrn_window_toggle_fullscreen (HRN_WINDOW (window));
+        return TRUE;
+    }
 
     return gtk_window_propagate_key_event (window, event);
 }
@@ -156,9 +162,13 @@
 hrn_window_fullscreen (HrnWindow *self)
 {
 #ifndef DISABLE_MUTTER_MOBLIN_FULLSCREEN_HACK
+  HrnWindowPrivate *priv;
   GdkScreen *screen = gdk_screen_get_default ();
   gint width, height;
 
+  priv = GET_PRIVATE (self);
+  gtk_window_get_size (GTK_WINDOW (self), &priv->orig_width, &priv->orig_height);
+
   /* XXX: This is a hack so that mutter doesn't disable the panel as it would
    * for a real fullscreen window.
    *
@@ -176,6 +186,41 @@
 #endif
 }
 
+void
+hrn_window_unfullscreen (HrnWindow *self)
+{
+#ifndef DISABLE_MUTTER_MOBLIN_FULLSCREEN_HACK
+    HrnWindowPrivate *priv;
+
+    priv = GET_PRIVATE (self);
+
+    if (priv->orig_width > 0 || priv->orig_height > 0) {
+        gtk_window_set_decorated (GTK_WINDOW (self), TRUE);
+        gtk_window_resize (GTK_WINDOW (self), priv->orig_width, priv->orig_height);
+    }
+#else
+    gtk_window_unfullscreen (GTK_WINDOW (self));
+#endif
+}
+
+void
+hrn_window_toggle_fullscreen (HrnWindow *self)
+{
+#ifndef DISABLE_MUTTER_MOBLIN_FULLSCREEN_HACK
+    if (gtk_window_get_decorated (GTK_WINDOW (self)))
+        hrn_window_fullscreen (self);
+    else
+        hrn_window_unfullscreen (self);
+#else
+    if (GTK_WINDOW (self)->window) {
+        if (gdk_window_get_state (GTK_WINDOW (self)->window) & GDK_WINDOW_STATE_FULLSCREEN)
+           hrn_window_unfullscreen (self);
+        else
+           hrn_window_fullscreen (self);
+    }
+#endif
+}
+
 ClutterActor *
 hrn_window_get_stage (HrnWindow *self)
 {
only in patch2:
unchanged:
--- hornsey-1.5.1.orig/src/hrn-window.h
+++ hornsey-1.5.1/src/hrn-window.h
@@ -47,6 +47,8 @@
 
 HrnWindow *hrn_window_new (HrnStateManager *manager);
 void hrn_window_fullscreen (HrnWindow *self);
+void hrn_window_unfullscreen (HrnWindow *self);
+void hrn_window_toggle_fullscreen (HrnWindow *self);
 ClutterActor *hrn_window_get_stage (HrnWindow *self);
 void hrn_window_set_internal_actor (HrnWindow    *self,
                                     ClutterActor *actor);