Re: Faces customization group linked from mode groups

[Juri Linkov <juri@jurta.org>]

> There was recently a question on the gnu-emacs-help list from someone
> trying to customize the faces used in syntax highlighting C mode. He
> looked in C mode customization group but could not find it.
>
> Maybe it would be a good idea to have a link to the faces customization
> from each mode customization group? (If that is possible in a simple way?)

One solution is to add the parent group `font-lock-highlighting-faces'
to all groups of modes that support font-lock.  But this has one negative
effect: the `group' link is two-directional, so the customization group
`font-lock-highlighting-faces' will display too many children links
to all such groups.

A better solution is to implement a new one-directional link to another
customization group.  Currently `:link' supports four link types, and a
new link type could have the name `custom-group'.  It could create a
one-directional link in the customization buffer leading to the specified
group, e.g.:

(defgroup c nil
  "Support for the C language and related languages."
  :link '(custom-manual "(ccmode)")    ;; this is already existing link
  :link '(custom-group font-lock-highlighting-faces) ;; a new link type
  :group 'languages)

-- 
Juri Linkov
http://www.jurta.org/emacs/