From: edgar@openmail.cc
To: help-gnu-emacs@gnu.org
Subject: How to set margins of buffer when window changes?
Date: Wed, 08 Sep 2021 17:12:22 +0000 [thread overview]
Message-ID: <20210908171222.Horde.S37YI7HmNoomvQZ1iZ9ma5I@www.vfemail.net> (raw)
Hello dear Emacs users!
I am trying to have some buffers centre the text. I figured that I
could do it with margins. I want this to adjust depending on the value
of `fill-column' (could be any other variable) and the width of the
window (if it is too small, don't centre). I have the code below, but
I get the error: `Window ... too small for splitting' (replace `...'
with the name of the buffer's window). I added a hook to the major
mode list of hooks, but it could be something else.
The format is very similar to what they seek here:
[https://stackoverflow.com/q/39083118]
How can I resize the window and adjust the margins depending on
`fill-column'? Thanks.
(with-eval-after-load 'python
(defun centre-text-with-margins (&optional window width)
"Moves the left and right margins to centre the contents of
the current buffer in the current window"
;; https://stackoverflow.com/a/54098261
;; https://stackoverflow.com/q/39083118
;; (if (or (> left-margin-width 0) (> right-margin-width 0))
;; (progn
(setq left-margin-width 0)
(setq right-margin-width 0)
;; (set-window-buffer nil (current-buffer))
(set-window-margins window 0 0)
;; ))
(let* ((txtwidth (cond (width) (fill-column)))
(space (max 0 (- (window-total-width) txtwidth)))
(leftside (floor (/ space 2)))
(rightside (- space leftside)))
(setq left-margin-width leftside)
(setq right-margin-width rightside)
(set-window-buffer window (current-buffer))
(format "lm:%s rm:%s sp:%s" left-margin-width
right-margin-width space)))
(defun py-margins-hook ()
(add-hook 'window-state-change-hook #'centre-text-with-margins t t))
(add-hook 'python-mode-hook 'py-margins-hook))
Emacs:
GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.27,
cairo version 1.17.4) of 2021-03-26
-------------------------------------------------
This free account was provided by VFEmail.net - report spam to abuse@vfemail.net
ONLY AT VFEmail! - Use our Metadata Mitigator to keep your email out of the NSA's hands!
$24.95 ONETIME Lifetime accounts with Privacy Features!
15GB disk! No bandwidth quotas!
Commercial and Bulk Mail Options!
next reply other threads:[~2021-09-08 17:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-08 17:12 edgar [this message]
2021-09-08 19:11 ` How to set margins of buffer when window changes? Joost Kremers
2021-09-08 20:57 ` edgar
2021-09-08 19:17 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-08 19:27 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-08 19:41 ` Emanuel Berg via Users list for the GNU Emacs text editor
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210908171222.Horde.S37YI7HmNoomvQZ1iZ9ma5I@www.vfemail.net \
--to=edgar@openmail.cc \
--cc=help-gnu-emacs@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).