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Re: erratic scrolling on incomplete lines

From: Miles Bader
Subject: Re: erratic scrolling on incomplete lines
Date: Wed, 23 Feb 2005 13:19:29 +0900

On Mon, 21 Feb 2005 23:52:50 +0100, Kim F. Storm <address@hidden> wrote:
> I just installed a fix which I think will fix this problem.

Hmmm, scrolling with partial-width lines definitely seems better now.

There are still a few glitches I've noticed, to do with the last line in
the buffer:

 (a) If the last line has no terminating newline, the cursor can still be
     displayed on the last line (and then run afoul of the asynchronous
     recentering problem previously noted).

     An example:

      (0) Set up your mode-line face or something so that the last line in
          the window can be partial-height.

      (1) Make a buffer containing more lines than the screen height, and
          make sure the last line doesn't have a final newline.

      (2) Position the cursor at the end of the last line.

      (3) Move the text in the window down line by line using `C-u -1 C-v'

      (4) When the line containing the curso reaches the end of the
          window, the next one-line scroll will indeed move the cursor --
          but to the beginning of the last [non-newline-terminated] line,
          which is now partial-height.

 (b) Maybe a related problem, if the cursor is positioned at the end of
     the buffer, when there _is_ a final newline (so the cursor is just
     after that final newline on an "empty" line), if you do
     line-by-line scrolls (as above in case (a)) to move the cursor past
     the bottom edge of the window, it will relocate point, not to the
     previous line, but to the previous-previous-line, so that [after
     scrolling] it's not located on the bottom-most full anymore, but on
     the line above that.


Do not taunt Happy Fun Ball.

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