GNU bug report logs - #7381
24.0.50; Provide a hook run when a window is selected

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From: Štěpán Němec <stepnem <at> gmail.com>
To: martin rudalics <rudalics <at> gmx.at>, 7381 <at> debbugs.gnu.org
Subject: bug#7381: 24.0.50; Provide a hook run when a window is selected
Date: Sat, 12 Jan 2019 12:46:34 +0100

On Sat, 12 Jan 2019 10:15:24 +0100
martin rudalics wrote:

> Current master now provides a hook run when redisplay detects that the
> selected window has changed wrt last redisplay.  The hook is called
> 'window-selection-change-functions' and is described in detail in the
> Elisp manual.

Thank you very much. Despite still using GNU Emacs daily, I currently
don't follow the development version so I can't test the changes, but I
really appreciate your getting back to this after so many years.

> Below I sketch how that hook could be used to provide
> the behavior you asked for.

> (defvar .old-selected-window (selected-window))
>
> (defun .update-old-selected-window (frame)
>    (unless (eq .update-old-selected-window old-selected-window)
>      (setq .old-selected-window (old-selected-window))))

It seems to me this was meant to read

 (defun .update-old-selected-window (frame)
    (unless (eq .old-selected-window (old-selected-window))
      (setq .old-selected-window (old-selected-window))))

  Thanks,

  Štěpán

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