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

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From: Po Lu <luangruo <at> yahoo.com>
To: Jim Porter <jporterbugs <at> gmail.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, Ashton Wiersdorf <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: 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.

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