Re: Replace selective-display in Gnus

[Reiner Steib <reinersteib+gmane@imap.cc>]

On Sat, Aug 29 2009, Dan Nicolaescu wrote:

> Reiner Steib <reinersteib+gmane@imap.cc> writes:
>
>   > On Sat, Aug 29 2009, Stefan Monnier wrote:
>   > 
>   > >> Could someone propose a patch how to use invisible overlays here?  It
>   > >> should be compatible with Emacs 21 (and up) and XEmacs 21.4 (and up)
>   > >> if possible.
>   > >
>   > > Here is the gnus-sum.el code I'm using nowadays.
>   > 
>   > Thanks.
>   > 
>   > > IIRC it's not 100% correct (the behavior is not quite the same as
>   > > the current one).
>   > 
>   > What is the difference?  (I don't use this feature so I'll probably
>   > won't notice it.)

Unanswered, AFAICS?
 
>   > > This includes unrelated changes, and uses remove-overlays which was
>   > > new in Emacs-22.
>   > 
>   > As we need the old code for compatibility with older Emacsen, I think
>   > I will install it with some (fboundp 'remove-overlays) conditionals.
>
> Instead of conditionals you could replace `remove-overlays' calls with
> something like:
>
>     (dolist (ov (overlays-in from to))
>       (when (overlay-get ov 'gnus-sum)
>         (delete-overlay ov)))))
>
> which should work everywhere.

Thanks, Stefan and Dan.  I have committed this.

Bye, Reiner.
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