bug#73032: 31.0.50; vtable header is not aligned

[Eli Zaretskii <eliz@gnu.org>]

> From: Aleksandr Vityazev <avityazev@disroot.org>
> Cc: 73032@debbugs.gnu.org
> Date: Thu, 05 Sep 2024 19:39:37 +0300
> 
> On 2024-09-05 10:36, Eli Zaretskii wrote:
> 
> >> Date: Thu, 05 Sep 2024 01:45:14 +0300
> >> From:  Aleksandr Vityazev via "Bug reports for GNU Emacs,
> >>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> >> 
> >> There is a problem in vtable.el when an emoji is specified as a delimiter; the
> >> header and row delimiters are not aligned.
> >> 
> >> Minimal reproducer for emacs -Q:
> >> 
> >> (require 'vtable)
> >> (with-current-buffer (get-buffer-create "*test*")
> >>   (make-vtable
> >>    :columns '((:name "Name" :width 20) "Size" "File")
> >>    :objects (buffer-list)
> >>    :actions '("k" kill-buffer
> >>               "RET" display-buffer)
> >>    :divider " 🍉 "
> >>    :getter (lambda (object column vtable)
> >>              (pcase (vtable-column vtable column)
> >>                ("Name" (buffer-name object))
> >>                ("Size" (buffer-size object))
> >>                ("File" (or (buffer-file-name object) "")))))
> >>   (switch-to-buffer "*test*"))
> >> 
> >> Screenshot is attached.
> >
> > I cannot get them aligned even if I replace the Emoji character with
> > an ASCII character, like 'x'.  Can you?
> No, I can't.
> 
> > AFAICT, there's inconsistency in whitespace calculation between the
> > header line and the body of the table, due to the desire to display
> > the sorting indicator not quite right-aligned.  The patch below
> > attempts to fix that; does it give good results?
> 
> The patch helped, but there are still some issues. I was able to achieve
> alignment with the following settings:
> (set-face-attribute 'default nil :family "monospace" :height 210)
> 
> With: (set-face-attribute 'default nil :family "monospace" :height 220)
> the header separators are also misaligned. My patch is based on the one
> that was sent; I just commented out the insertion of an extra space
> after the column name.

Thanks, I've now installed the changes with your modification, and I'm
therefore closing this bug.