bug#62275: 28.2; Changing major mode changes the current text scaling

[Eli Zaretskii]

> From: Drew Adams <drew.adams@oracle.com>
> CC: "62275@debbugs.gnu.org" <62275@debbugs.gnu.org>
> Date: Sun, 19 Mar 2023 17:22:39 +0000
> 
> > > I tried doing this, but it didn't fix the behavior.
> > >
> > > (put 'text-scale-mode-remapping 'permanent-local t)
> > > (put 'text-scale-mode-lighter 'permanent-local t)
> > > (put 'text-scale-mode-amount 'permanent-local t)
> > 
> > You need to do this with face-remapping-alist.
> 
> The request is not about _setting_ the remapping of any face or set of faces.
> 
> The request is for the effect of text-scaling, from _interactive_ use of 
> `text-scale-adjust', to not be removed when the major mode is changed and the 
> buffer isn't switched.

Text-scaling works via face-remapping.

> > Sounds like creeping featurism to me.  If you want the text size
> > larger, then why not customize the default face, and have that done
> > once and for all?  Text-scale is by definition a temporary measure.
> 
> I don't want the text size larger in general or by default - of any face, let 
> alone face `default'.

But that's what text-scaling does: it enlarges the default face's
font.

> It's about interactive use of `text-scale-adjust`.  Seems to me its behavior 
> should be only buffer-specific and not affected by a major-mode change.  Is 
> that not a reasonable behavior to want, if not even generally _expect_?

No, not IMO.