Copyright 1995 by Digital Equipment Corp.
This interface contains a few utility routines that
Editor needs for operating
on textports. These routines might have been in the
TextPort interface, but
PROCEDURE TopLineIndex(tp: TextPort.T): INTEGER;
Return the character position of the beginning of the first visible line of
PROCEDURE IndexToTop(tp: TextPort.T; i: INTEGER);
tp so that the line containing index
i becomes the top visible line.