GNU bug report logs - #74430
30.0.92; pixel-scroll-precision-mode hiding Eshell prompt after some commands

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From: Eli Zaretskii <eliz <at> gnu.org>
To: luangruo <at> yahoo.com
Cc: jporterbugs <at> gmail.com, ashton <at> wiersdorfmail.net, 74430 <at> debbugs.gnu.org
Subject: bug#74430: 30.0.92; pixel-scroll-precision-mode hiding Eshell prompt after some commands
Date: Sat, 28 Dec 2024 13:13:18 +0200

Ping! Ping! Ping!  Po Lu, are you there?

> Cc: jporterbugs <at> gmail.com, ashton <at> wiersdorfmail.net, 74430 <at> debbugs.gnu.org
> Date: Sat, 14 Dec 2024 11:38:38 +0200
> From: Eli Zaretskii <eliz <at> gnu.org>
> 
> Ping! Ping!  Po Lu, can you please answer the question?
> 
> > Cc: jporterbugs <at> gmail.com, ashton <at> wiersdorfmail.net, 74430 <at> debbugs.gnu.org
> > Date: Sat, 30 Nov 2024 12:07:51 +0200
> > From: Eli Zaretskii <eliz <at> gnu.org>
> > 
> > Ping!
> > 
> > > Cc: jporterbugs <at> gmail.com, ashton <at> wiersdorfmail.net, 74430 <at> debbugs.gnu.org
> > > Date: Fri, 22 Nov 2024 08:58:58 +0200
> > > From: Eli Zaretskii <eliz <at> gnu.org>
> > > 
> > > > From: Po Lu <luangruo <at> yahoo.com>
> > > > Cc: Eli Zaretskii <eliz <at> gnu.org>,  Ashton Wiersdorf
> > > >  <ashton <at> wiersdorfmail.net>,  74430 <at> debbugs.gnu.org
> > > > Date: Fri, 22 Nov 2024 07:59:50 +0800
> > > > 
> > > > Jim Porter <jporterbugs <at> gmail.com> writes:
> > > > 
> > > > > I'm only dimly aware of how 'pixel-scroll-precision-mode' works, but I
> > > > > seem to recall that it sets the window's vscroll to allow scrolling
> > > > > past *part* of a line. On the Eshell side, I believe the relevant
> > > > > function is 'eshell-postoutput-scroll-to-bottom', which calls
> > > > > 'recenter' to scroll the window.
> > > > >
> > > > > I'm guessing these interact badly, and what we actually want to do is
> > > > > to reset the vscroll when Eshell calls 'recenter'. However, I'm not
> > > > > sure what the best way to do this would be. Is there some better
> > > > > function Eshell can call that would handle this case correctly?
> > > > 
> > > > Since pixel-scroll-precision-mode never configures a vscroll taller than
> > > > one screen line, resetting vscroll in these scenarios is generally the
> > > > safest and simplest solutions to problems such as the OP is facing.
> > > 
> > > So you suggest that eshell-postoutput-scroll-to-bottom explicitly
> > > resets the window's vscroll, and that should solve the OP's problem?
> > > 
> > > 
> > > 
> > > 
> > 
> > 
> > 
> > 
> 
> 
> 
> 

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