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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: [PATCH] Improve interaction between mouse-drag-region and
 scroll-margin
Date: Sat, 25 Sep 2021 19:41:17 +0300
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To: Yuri D'Elia <wavexx@thregr.org>
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In-Reply-To: <875yuozker.fsf@wavexx.thregr.org> (message from Yuri D'Elia on
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> From: Yuri D'Elia <wavexx@thregr.org>
> Date: Sat, 25 Sep 2021 18:31:40 +0200
> 
> On Sat, Sep 25 2021, Eli Zaretskii wrote:
> >> auto-hscroll-mode in mouse-drag-region and do not re-enable them until
> >> dragging is over, making selections work as expected when inside the
> >> margins.
> >
> > If you disable auto-hscroll-mode, why do you also need to zero out
> > hscroll-margin?
> 
> It doesn't, it just disables auto-hscroll-mode.

Sorry, I don't understand "it doesn't" what?

Don't you want to disable the automatic horizontal scrolling of the
window when point gets close to the window edges?  If so, disabling
auto-hscroll-mode should do just that, regardless of the value of
hscroll-margin.  Or what am I missing?