From: Stefan Monnier <monnier@iro.umontreal.ca>
To: help-gnu-emacs@gnu.org
Subject: Re: how can I run commands when window displays a different buffer?
Date: Sun, 29 Oct 2017 21:52:27 -0400 [thread overview]
Message-ID: <jwva809xvbi.fsf-monnier+gmane.emacs.help@gnu.org> (raw)
In-Reply-To: 59F4439F.60306@gmx.at
> The code below should do that.
> (defun update-window-buffer-list ()
> (let ((old (frame-parameter nil 'window-buffer-list))
> new this)
> (walk-window-tree
> (lambda (window)
> (let ((old-buffer (cdr (assq window old)))
> (new-buffer (window-buffer window)))
> (unless (eq old-buffer new-buffer)
> ;; The buffer of a previously existing window has changed or
> ;; a new window has been added to this frame.
> (ding))
> (setq new (cons (cons window new-buffer) new)))))
> (set-frame-parameter nil 'window-buffer-list new)))
> (add-hook 'window-configuration-change-hook 'update-window-buffer-list)
> You can write a more destructive version using ‘setcdr’.
Hmm... why use a frame-parameter rather than a window-parameter?
(defun update-window-buffer-list ()
(walk-window-tree
(lambda (window)
(let ((old-buffer (window-parameter window 'my-last-buffer))
(new-buffer (window-buffer window)))
(unless (eq old-buffer new-buffer)
;; The buffer of a previously existing window has changed or
;; a new window has been added to this frame.
(ding)
(setf (window-parameter window 'my-last-buffer) new-buffer))))))
-- Stefan
next prev parent reply other threads:[~2017-10-30 1:52 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-27 12:53 how can I run commands when window displays a different buffer? martin rudalics
2017-10-27 13:34 ` Amos Bird
2017-10-28 8:45 ` martin rudalics
2017-10-28 8:56 ` Amos Bird
2017-10-30 1:52 ` Stefan Monnier [this message]
-- strict thread matches above, loose matches on Subject: below --
2017-10-27 12:04 Amos Bird
2017-10-27 12:18 ` Kaushal Modi
2017-10-27 12:46 ` Amos Bird
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