Return an error code when refreshing the entry from the user's input

Return an error code when refreshing the entry from the user's input
2009-01-22  Federico Mena Quintero  <federico@novell.com>

	Return an error code when refreshing the entry from the user's
	input.  We use this in the completion code to know when completion
	can't happen due to (for example) having a non-local URI in a file
	chooser that is local_only=TRUE.

	Also, we start maintaining an invariant that
	chooser_entry->current_folder_file != NULL implies that:

		* what the user entered is valid

		* we are loading that folder (chooser_entry->load_folder_cancellable != NULL)

		* or we are done loading that folder, or we have a handle
		to it at least (chooser_entry->current_folder != NULL)

	The invariant also says that all of the above are NULL (and
	chooser_entry->current_folder_file == NULL) implies that the user
	typed something invalid.  This makes
	_gtk_file_chooser_entry_get_current_folder() not able to return
	an invalid folder.

	* gtk/gtkfilechooserentry.c (RefreshStatus): New enum.
	(refresh_current_folder_and_file_part): Return a RefreshStatus.
	We filter out incomplete hostnames here (typing
	"sftp://incompl[tab]" will error out), as well as completely
	unparsable input.

Signed-off-by: Federico Mena Quintero <federico@novell.com>
svn path=/trunk/; revision=22177