GNU bug report logs - #77544
(WIP) [PATCH] Prettify page separators.

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Visuwesh <visuweshm <at> gmail.com>
Cc: gerd.moellmann <at> gmail.com, eg642616 <at> gmail.com, 77544 <at> debbugs.gnu.org
Subject: bug#77544: (WIP) [PATCH] Prettify page separators.
Date: Sun, 06 Apr 2025 10:31:13 +0300

> From: Visuwesh <visuweshm <at> gmail.com>
> Cc: Gerd Möllmann <gerd.moellmann <at> gmail.com>,  Eli
>  Zaretskii <eliz <at> gnu.org>,
>   77544 <at> debbugs.gnu.org
> Date: Sun, 06 Apr 2025 12:27:39 +0530
> 
> [சனி ஏப்ரல் 05, 2025] Elijah Gabe Pérez wrote:
> 
> > Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:
> >
> >> Nothing to add to your comments ATM, but maybe an alternative idea: how
> >> about solving this with a new type of display property for drawing a
> >> horizontal line? Say `horizontal-line WIDTH' where WIDTH could be nil or
> >> something to draw a line to the end of the display area? That would have
> >> the advantage that it would be a relatively locally confined change and
> >> would have no impact when not used, and hopefully little potential to
> >> break unrelated things when not used.
> >
> > I like this idea.
> 
> Do we need a new display property when we have the :strike-through face
> attribute?  The following achieves the same effect, albeit the newline
> is required for the :extend attribute to work properly AFAIU:
> 
>     (font-lock-add-keywords 
>      nil
>      '(("\f\n" (0 (prog1 nil
>                     (put-text-property (match-beginning 0) (1- (match-end 0))
>                                        'display " ")
>                     (put-text-property (match-beginning 0) (match-end 0)
>                                        'face '(:strike-through t :extend t)))))))
>     (push 'display font-lock-extra-managed-props)

Thanks, but what does this do on TTY frames?  We'd want to show
dashes, I think.

Besides, we don't have any control on the thickness of the
strike-through line, something that would be a natural extension here.
And it sounds like a kludge to me, TBH.

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