Re: How can I contextually override shift selection functions?

[Eli Zaretskii]

> From: ndame <emacsuser@freemail.hu>
> Date: Sun,  4 Aug 2019 20:07:20 +0200 (CEST)
> 
> (local-set-key (kbd "S-<down>") (lambda ()
>                                   (interactive)
>                                   (if (my-context)
>                                       (do 'something 'else)
>                                     
>                                     ;; call S-down as usual
>                                     (call-interactively 'next-line))))
> 
> 
> Only the thing is call-interactively does not work here, that is
> it does not extend the selection when I press S-down.
> 
> How can I invoke then the original shift selection feature from a
> program if I want to invoke the default behavior?

Did you already study the handle-shift-selection function?