GNU bug report logs - #16475
24.3.50; enhancement request: remove vertical scroll bar automatically when not needed

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Message #32 received at 16475 <at> debbugs.gnu.org (full text, mbox):

From: Keith David Bershatsky <esq <at> lawlist.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 16475 <at> debbugs.gnu.org, Martin Rudalics <rudalics <at> gmx.at>
Subject: Re: bug#16475: enhancement request: remove vertical scroll bar
 automatically when not needed
Date: Thu, 26 Oct 2017 09:03:10 -0700

The values for window-start and window-end will not necessarily be accurate until somewhere towards the end of redisplay.  A test that relies upon those values to add/remove scroll bars will often fail.

Keith

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DATE:  [10-26-2017 08:59:02] <26 Oct 2017 18:59:02 +0300>
FROM:  Eli Zaretskii <eliz <at> gnu.org>
> 
> * * *
> 
> I agree, but then the right place to call this is not from redisplay,
> but from keyboard.c, before it calls read_char (which calls
> redisplay).  set-window-scroll-bars triggers a redisplay cycle, so
> calling it from (the end of) redisplay is not very wise, IMO.

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