2003-04-05  Rob Adams  <robadams@ucla.edu>

	Update placement policy for screen with multiple xineramas.
	Windows will be placed preferentially on the xinerama with the
	pointer, and progressively further away as needed to find a place
	where the window does not overlap other windows.

	* src/place.c (rect_fits_in_work_area): function
	fit_rect_in_xinerama greatly simplified to work with new placement
	policy.
	(find_first_fit): implement new first first placement scheme

	* src/screen.c (meta_screen_get_xinerama_neighbor): look for an
	xinerama in the xinerama list that is adjacent to the specified
	xinerama.
	(meta_screen_get_natural_xinerama_list): return a list of
	xineramas in the order to be preferred by the placement algorithm
	as determined by the current location of the pointer.

	* src/screen.h: add function prototypes and an enum used by
	meta_screen_get_xinerama_neighbor.