[gtk+] gdk: Remove supports_native_bg on WindowImplIface

[Benjamin Otte <otte src gnome org>]

commit c250b3fe1d6e62c9deb9e3b968ba403fbe9b4e5e
Author: Benjamin Otte <otte redhat com>
Date:   Sun Aug 15 03:27:30 2010 +0200

    gdk: Remove supports_native_bg on WindowImplIface
    
    This will not be TRUE for anything anymore, once we fix background
    handling.

 gdk/gdkwindow.c         |   26 +-------------------------
 gdk/gdkwindowimpl.h     |    1 -
 gdk/x11/gdkwindow-x11.c |    1 -
 3 files changed, 1 insertions(+), 27 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 9fe4810..814c411 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -3812,28 +3812,6 @@ gdk_window_clear (GdkWindow *window)
 			 width, height);
 }
 
-/* TRUE if the window clears to the same pixels as a native
-   window clear. This means you can use the native window
-   clearing operation, and additionally it means any clearing
-   done by the native window system for you will already be right */
-static gboolean
-clears_as_native (GdkWindowObject *private)
-{
-  GdkWindowObject *next;
-
-  next = private;
-  do
-    {
-      private = next;
-      if (gdk_window_has_impl (private))
-	return TRUE;
-      next = private->parent;
-    }
-  while (private->bg_pixmap == GDK_PARENT_RELATIVE_BG &&
-	 next && next->window_type != GDK_WINDOW_ROOT);
-  return FALSE;
-}
-
 static void
 gdk_window_clear_region_internal (GdkWindow *window,
 				  cairo_region_t *region)
@@ -4842,9 +4820,7 @@ gdk_window_invalidate_maybe_recurse_full (GdkWindow       *window,
 	 for window backgrounds */
       if (private->event_mask & GDK_EXPOSURE_MASK ||
 	  clear_bg == CLEAR_BG_ALL ||
-	  (clear_bg == CLEAR_BG_WINCLEARED &&
-	   (!clears_as_native (private) ||
-	    !GDK_WINDOW_IMPL_GET_IFACE (private->impl)->supports_native_bg)))
+	  clear_bg == CLEAR_BG_WINCLEARED)
 	impl_window_add_update_area (impl_window, visible_region);
     }
 
diff --git a/gdk/gdkwindowimpl.h b/gdk/gdkwindowimpl.h
index fcb8ba2..ac8b7ca 100644
--- a/gdk/gdkwindowimpl.h
+++ b/gdk/gdkwindowimpl.h
@@ -143,7 +143,6 @@ struct _GdkWindowImplIface
   void         (* destroy)              (GdkWindow       *window,
 					 gboolean         recursing,
 					 gboolean         foreign_destroy);
-  gboolean     supports_native_bg;
 };
 
 /* Interface Functions */
diff --git a/gdk/x11/gdkwindow-x11.c b/gdk/x11/gdkwindow-x11.c
index a505da7..7978532 100644
--- a/gdk/x11/gdkwindow-x11.c
+++ b/gdk/x11/gdkwindow-x11.c
@@ -5464,7 +5464,6 @@ gdk_window_impl_iface_init (GdkWindowImplIface *iface)
   iface->queue_antiexpose = _gdk_x11_window_queue_antiexpose;
   iface->translate = _gdk_x11_window_translate;
   iface->destroy = _gdk_x11_window_destroy;
-  iface->supports_native_bg = TRUE;
 }
 
 static Bool