This change adds support for the new _NET_WM_FULLSCREEN_MONITORS

property and client message.  This allows client applications to request
 	that a fullscreen window cover more than one monitor.
 	* src/include/boxes.h:
	* src/core/boxes.c: Add meta_rectangle_union
 	* src/core/window-private.h:
	* src/core/window.c:
 	(meta_window_new_with_attrs, meta_window_free, set_net_wm_state,
 	meta_window_update_fullscreen_monitors, meta_window_client_message): Add
 	MetaWindow property to store fullscreen monitors field, update
 	_NET_WM_FULLSCREEN_MONITORS property on windows, and handle client
 	message.
 	* src/core/atomnames.h: Add _NET_WM_FULLSCREEN_MONITORS atom.
 	* src/core/constraints.c (setup_constraint_info): If
 	_NET_WM_FULLSCREEN_MONITORS is interesting, use the data stored in
 	MetaWindow::fullscreen_monitors to determine the fullscreen area instead
 	of the basic xinerama_info area.


svn path=/trunk/; revision=4021

src/include/boxes.h

@@ -103,6 +103,11 @@ gboolean meta_rectangle_intersect       (const MetaRectangle *src1,
 gboolean meta_rectangle_equal           (const MetaRectangle *src1,
                                          const MetaRectangle *src2);
 
+/* Find the bounding box of the union of two rectangles */
+void     meta_rectangle_union           (const MetaRectangle *rect1,
+                                         const MetaRectangle *rect2,
+                                         MetaRectangle       *dest);
+
 /* overlap is similar to intersect but doesn't provide location of
  * intersection information.
  */