Re: select-frame-set-input-focus operates on wrong frame

[Stefan Monnier via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>]

> (defun ofv-display-buffer-pop-up-frame (buffer &rest alist)
>   (unless (catch 'out
> 	    (dolist (frame (frame-list))
> 	      (when (and (equal (frame-parameter frame 'display)
> 				(frame-parameter nil 'display))
> 			 (string= "pdf" (frame-parameter frame 'name)))
> 		(with-selected-frame frame
> 		  (select-frame-set-input-focus frame)
> 		  (display-buffer-full-frame buffer '())
> 		  (throw 'out t)))))
>     (display-buffer-full-frame buffer alist)))

As you discovered, using something like `select-frame-set-input-focus`
from within a `with-selected-frame` is not a good idea.
I don't know why you did that, because it seems contradictory, I suspect
it was an oversight.

Regarding the focus itself (which is a subtly different concept than the
selected frame), the situation is very messy and what happens in which
case can also depend on your window-manager (or the part of your OS
which takes on that responsibility) as well as timing.  🙁

> (setq server-window 'ofv-display-buffer-pop-up-frame)

I recommend #' here to clarify that this is intended to set the var to
a function.


        Stefan