2003-03-12  Alexander Larsson  <alexl@redhat.com>

	* libnautilus-private/nautilus-file-private.h:
	* libnautilus-private/nautilus-file.c: (finalize),
	(nautilus_file_invalidate_attributes_internal),
	(nautilus_file_is_thumbnailing),
	(nautilus_file_set_is_thumbnailing):
	* libnautilus-private/nautilus-file.h:
	Keep track of whether the file is being thumbnailed.
	If it is at finalization, remove from the thumbnail queue.

	* libnautilus-private/nautilus-icon-container.h:
	* libnautilus-private/nautilus-icon-container.c:
	(redo_layout_internal), (realize),
	(nautilus_icon_container_instance_init),
	(nautilus_icon_container_prioritize_thumbnailing),
	(nautilus_icon_container_prioritize_thumbnailing_for_visible_icons)
	, (handle_vadjustment_changed):
	Prioritize thumbnailing for icons visibile on the screen.

	* libnautilus-private/nautilus-icon-factory.c:
	(show_thumbnails_changed_callback):
	Remove all thumbnails from queue when thumbnails are disabled.

	* libnautilus-private/nautilus-thumbnails.h:
	* libnautilus-private/nautilus-thumbnails.c: (free_thumbnail_info),
	(nautilus_thumbnail_remove_from_queue),
	(nautilus_thumbnail_remove_all_from_queue),
	(nautilus_thumbnail_prioritize),
	(thumbnail_thread_notify_file_changed),
	(nautilus_create_thumbnail), (thumbnail_thread_start):
	New functions to remove thumbnails from the queue and to prioritize them.

	* src/file-manager/fm-icon-container.c:
	(fm_icon_container_prioritize_thumbnailing),
	(fm_icon_container_class_init):
	Implement prioritize_thumbnailing.