Re: header-line-format hacking

[ytrewq1]

Kevin Rodgers writes:
 
> (setq header-line-format
>        (cond ((null header-line-format) my-header-line-format)
>              ((stringp header-line-format)
>               (list header-line-format my-header-line-format))
>              ((symbolp header-line-format)
>               (list (list t header-line-format) my-header-line-format))
>              ((consp header-line-format)
>               (append header-line-format (list my-header-line-format)))))

Thanks.

I'm thinking of putting something like the above in the set-up portion
of a couple of minor modes I'm working on.  It occurs to me though
if I were to turn the minor mode on, off, and then on again, I'll
be repeatedly adding my format to header-line-format.  I suppose one
way to prevent this would be to have the minor mode code try to 
detect if the header-line-format has already been modified by the
minor mode.  Does that sound like a reasonable/practical approach?