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Re: About the :distant-foreground face attribute

From: Chong Yidong
Subject: Re: About the :distant-foreground face attribute
Date: Fri, 10 Jan 2014 02:21:06 +0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)

Eli Zaretskii <address@hidden> writes:

>> Please don't.  That too would break code that expects :foreground to
>> be as it is now.
> Why do you assume that the previous form will not be accepted?  Of
> course, it will be.

What Drew is worrying about, I think, is that third-party code, or old
versions of Emacs, will barf when they come across the new :foreground
form in user customizations or themes.

I don't know whether this would be a major problem in practice.
Personally, I agree with David Engster that

  If you really really want font-lock on a marked region, then you will
  have to choose a region background which will play well with your
  color theme.  Introducing a new face attribute for such a small
  annoyance looks like overkill to me.

But IF people feel really strongly about having this feature, doing it
by adding a new :foreground type seems like the least bad option, from a
code cleanliness perspective.

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