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Re: Pixel padding with variable pitch font
From: |
Eli Zaretskii |
Subject: |
Re: Pixel padding with variable pitch font |
Date: |
Mon, 07 Jun 2021 16:35:07 +0300 |
> From: Anand Tamariya <atamariya@gmail.com>
> Date: Mon, 7 Jun 2021 18:49:01 +0530
>
> If you need to pad space with variable pitch font, and you are unable to use
> ':align-to display' option for any
> reason, you can use the following code. This uses unicode spacing characters
> to insert required amount of
> space.
>
> Screenshot: https://lifeofpenguin.blogspot.com/2021/06/gnu-emacs.html
>
> (defun company--insert-space (width w)
> "Insert unicode space characters to fit the WIDTH."
> (let ((num 0))
> (dolist (spc '((#x2001 . 1) (#x2000 . 0.5) (#x2004 . 0.33) (#x2005 .
> 0.25) (#x2006 . 0.16) (#x200A . 0.125)))
> (setq num (floor (/ width w (cdr spc))))
> (if (memq (car spc) '(#x2001 #x2000 #x2004 #x2005))
> ;; Allow finer spaces towards the end for better accuracy
> (setq num (1- num)))
> (when (> num 0)
> (dotimes (i num)
> (insert (car spc)))
> (setq width (- width (* num w (cdr spc))))
> ))))
This assumes that, e.g., #x2001 takes the same horizontal space as the
SPC character (or the same as a column)? That's only so in
fixed-pitch fonts; in variable-pitch fonts the SPC could be much more
narrow, and columns are all but meaningless. Caveat emptor!