GNU bug report logs - #14604
24.3.50.1; Possibly incorrect behaviour of frame-selected-window

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From: E Sabof <esabof <at> gmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 14604 <at> debbugs.gnu.org
Subject: bug#14604: 24.3.50.1; Possibly incorrect behaviour of frame-selected-window
Date: Wed, 30 Oct 2013 19:23:21 +0000

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Thanks!

Evgeni


On Wed, Oct 30, 2013 at 5:50 PM, Stefan Monnier <monnier <at> iro.umontreal.ca>wrote:

> > (defvar user-selected-window nil)
> > (defun register-user-location ()
> >   (setq user-selected-window (selected-window)))
> > (add-hook 'post-command-hook 'register-user-location)
>
> > (setq-default
> >   mode-line-format
> >   '(:eval (if (eq user-selected-window (selected-window))
> >               "selected"
> >               "not-selected")))
>
> That will usually work, except for corner-cases where redisplay happens
> in the middle of a command, or when the selected window is modified
> between commands (e.g. from a process sentinel).
>
> You can make it reliable with the use of the new
> `pre-redisplay-function' hook (instead of post-command-hook), which
> I just added yesterday.
>
> Of course, making it reliable doesn't mean it's not an omission.
> I tend to agree that it would be good to provide access to that info
> more directly.
>
>
>         Stefan
>

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