Copyright 1995 by Digital Equipment Corp.
INTERFACE EditorXtra;
This interface contains a few utility routines that Editor needs for operating
on textports. These routines might have been in the TextPort interface, but
aren't.
IMPORT TextPort;
PROCEDURE TopLineIndex(tp: TextPort.T): INTEGER;
Return the character position of the beginning of the first visible line of tp.
PROCEDURE IndexToTop(tp: TextPort.T; i: INTEGER);
Scroll tp so that the line containing index i becomes the top visible line.
END EditorXtra.