Re: Native display of line numbers, improved

[Stephen Berman <stephen.berman@gmx.net>]

On Sun, 25 Jun 2017 19:02:54 +0300 Eli Zaretskii <eliz@gnu.org> wrote:

>> From: Stephen Berman <stephen.berman@gmx.net>
>> Cc: emacs-devel@gnu.org
>> Date: Sun, 25 Jun 2017 17:41:38 +0200
>> 
>> > This shows your face inherits from font-lock-comment-face.  It should
>> > inherit from line-number instead.  Or from the default face.  When I
>> > do one of those, the scaling works as you expected.
>> 
>> Got it, thanks.  Is this documented?
>
> Probably not.  And I'm not really sure how to document this in a way
> that's useful.
>
> In a nutshell, support for face remapping needs to be explicitly coded
> where we want it, and AFAIK we only coded that in a few places which
> were reported as bugs.  The fact that the face needs to inherit from
> 'default' is something I know only from personal experience.  In
> particular, Customize somehow tends to break face remapping, unless
> the inheritance keeps it from doing that.  Maybe someone who knows
> more about faces and their customizations could chime in.

I hope so.  It would be helpful to have clear guidelines, since faces
are probably one of the most frequently customized features in Emacs.

Steve Berman