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Re: redisplay code + non-plain-text-only buffers + scroll-conservatively

From: Karl Chen
Subject: Re: redisplay code + non-plain-text-only buffers + scroll-conservatively [Re: Bug: ruler-mode breaks scroll-conservatively (HEAD)]
Date: Tue, 31 Dec 2002 03:35:57 -0800

>>>>> "Juanma" == Juanma Barranquero <address@hidden> writes:

    Juanma> On Tue, 31 Dec 2002 00:48:40 -0500, Richard Stallman 
<address@hidden> wrote:
    >> Does this fix it?
    >> *** xdisp.c.~1.797.~     Sun Dec 22 16:13:49 2002
    >> --- xdisp.c      Tue Dec 31 00:26:36 2002

    Juanma> With this patch, scroll-conservatively works.

    Juanma> Still, there's a difference between scrolling down a buffer with
    Juanma> partially visible lines and without. With full lines, if you 
    Juanma> <down> pressed, the scroll is totally smooth. With a 
    Juanma> last line, the scroll "jumps" slightly every now and then (at 
    Juanma> equally distributed intervals, apparently).

Yes, I get the same results.

BTW, you can also get this behavior if you (setq scroll-step 1
scroll-conservatively 0) and hold down <down> on a ruler-less regular text
buffer on a slow remote X connection. Once in a while it'll jump a little to
"catch up" to point.

Anyway at least this patch works 95% of the time and never hangs
(is 95% good enough? http://www.jwz.org/doc/worse-is-better.html)

Karl Chen / address@hidden

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