2004-10-16  Elijah Newren  <newren@math.utah.edu>

	Make the "showing desktop" mode be per-workspace instead of
	per-screen. (fixes #142198)

	* src/keybindings.c (handle_toggle_desktop): access
	showing_desktop through the active workspace

	* src/screen.c (meta_screen_new): remove initialization of
	screen->showing_desktop,
	(meta_screen_update_showing_desktop_hint): rename and make not
	static and access showing_desktop through the active workspace,
	(queue_windows_showing): replace meta_display_list_windows() with
	screen->active_workspace->windows,
	(meta_screen_minimize_all_on_active_workspace_except): renamed
	from meta_screen_minimize_all_except since it now only works on
	the active workspace, (meta_screen_show_desktop,
	meta_screen_unshow_desktop): access showing_desktop through the
	active workspace

	* src/screen.h (struct _MetaScreen): remove showing_desktop field,
	(meta_screen_minimize_all_on_active_workspace_except): rename from
	meta_screen_minimize_all_except,
	(meta_screen_update)_showing_desktop_hint): export this function too

	* src/window.c (maybe_leave_show_desktop_mode): access
	showing_desktop through the active workspace and use new name for
	meta_screen_minimize_all_on_active_workspace_except,
	(window_should_be_showing): access showing_desktop through the
	active workspace

	* src/workspace.c (meta_workspace_new): initialize
	workspace->showing_desktop, (meta_workspace_activate_with_focus):
	add note that old can be NULL, update showing_desktop_hint if
	different on this workspace than the previous one

	* src/workspace.h (struct _MetaWorkspace): add showing_desktop
	field