Add meta_window_get_maximized() and meta_window_is_fullscreen()

These functions duplicate existing properties; they are added for
convenience and to avoid the GObject property code on some
performance critical painting paths.

https://bugzilla.gnome.org/show_bug.cgi?id=592382

src/core/window.c

@@ -3158,6 +3158,32 @@ meta_window_maximize (MetaWindow        *window,
     }
 }
 
+/**
+ * meta_window_get_maximized:
+ *
+ * Gets the current maximization state of the window, as combination
+ * of the %META_MAXIMIZE_HORIZONTAL and %META_MAXIMIZE_VERTICAL flags;
+ *
+ * Return value: current maximization state
+ */
+MetaMaximizeFlags
+meta_window_get_maximized (MetaWindow *window)
+{
+  return ((window->maximized_horizontally ? META_MAXIMIZE_HORIZONTAL : 0) |
+          (window->maximized_vertically ? META_MAXIMIZE_VERTICAL : 0));
+}
+
+/**
+ * meta_window_is_fullscreen:
+ *
+ * Return value: %TRUE if the window is currently fullscreen
+ */
+gboolean
+meta_window_is_fullscreen (MetaWindow *window)
+{
+  return window->fullscreen;
+}
+
 static void
 meta_window_tile (MetaWindow *window)
 {

src/include/window.h

@@ -120,6 +120,9 @@ void     meta_window_foreach_ancestor         (MetaWindow            *window,
                                                MetaWindowForeachFunc  func,
                                                void                  *user_data);
 
+MetaMaximizeFlags meta_window_get_maximized (MetaWindow *window);
+gboolean          meta_window_is_fullscreen (MetaWindow *window);
+
 gboolean meta_window_is_mapped (MetaWindow  *window);
 gboolean meta_window_toplevel_is_mapped (MetaWindow  *window);
 gboolean meta_window_get_icon_geometry (MetaWindow    *window,