GNU bug report logs - #72287
Emacs 29; RTL replacing display bug on 1st line

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: JD Smith <jdtsmith <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs 29; RTL replacing display bug on 1st line
Date: Thu, 25 Jul 2024 08:29:45 -0400

With bidi-paragraph-direction=right-to-left, replacing 'display properties are sometimes reversed on the 1st displayed line of text. 

(let* ((w (window-font-width))
       (h (window-font-height))
       (face )
       (str (cl-loop for col in '("red" "green" "blue" "cyan")
                     concat "  "
                     concat (propertize " " 'face `(:background ,col)))))
    (dotimes (i 10)
      (insert "\n" (propertize " " 'display str) (format ";;  line %d" i))))

Evaluate in *scratch* and scroll the color bars off the top of the screen.  Try again with bidi-paragraph-direction=right-to-left and the color order will invert and the bars shift by one char.   

Verified in Emacs 29 emacs-mac and NS builds.

Message #8 received at 72287 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: JD Smith <jdtsmith <at> gmail.com>
Cc: 72287 <at> debbugs.gnu.org
Subject: Re: bug#72287: Emacs 29; RTL replacing display bug on 1st line
Date: Thu, 25 Jul 2024 21:27:47 +0300

> From: JD Smith <jdtsmith <at> gmail.com>
> Date: Thu, 25 Jul 2024 08:29:45 -0400
> 
> With bidi-paragraph-direction=right-to-left, replacing 'display properties are sometimes reversed on the 1st displayed line of text. 
> 
> (let* ((w (window-font-width))
>        (h (window-font-height))
>        (face )
>        (str (cl-loop for col in '("red" "green" "blue" "cyan")
>                      concat "  "
>                      concat (propertize " " 'face `(:background ,col)))))
>     (dotimes (i 10)
>       (insert "\n" (propertize " " 'display str) (format ";;  line %d" i))))
> 
> Evaluate in *scratch* and scroll the color bars off the top of the screen.  Try again with bidi-paragraph-direction=right-to-left and the color order will invert and the bars shift by one char.   
> 
> Verified in Emacs 29 emacs-mac and NS builds.

Thanks, should be fixed now on the master branch.

Message #13 received at 72287-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: jdtsmith <at> gmail.com
Cc: 72287-done <at> debbugs.gnu.org
Subject: Re: bug#72287: Emacs 29; RTL replacing display bug on 1st line
Date: Sat, 17 Aug 2024 11:09:01 +0300

> Cc: 72287 <at> debbugs.gnu.org
> Date: Thu, 25 Jul 2024 21:27:47 +0300
> From: Eli Zaretskii <eliz <at> gnu.org>
> 
> > From: JD Smith <jdtsmith <at> gmail.com>
> > Date: Thu, 25 Jul 2024 08:29:45 -0400
> > 
> > With bidi-paragraph-direction=right-to-left, replacing 'display properties are sometimes reversed on the 1st displayed line of text. 
> > 
> > (let* ((w (window-font-width))
> >        (h (window-font-height))
> >        (face )
> >        (str (cl-loop for col in '("red" "green" "blue" "cyan")
> >                      concat "  "
> >                      concat (propertize " " 'face `(:background ,col)))))
> >     (dotimes (i 10)
> >       (insert "\n" (propertize " " 'display str) (format ";;  line %d" i))))
> > 
> > Evaluate in *scratch* and scroll the color bars off the top of the screen.  Try again with bidi-paragraph-direction=right-to-left and the color order will invert and the bars shift by one char.   
> > 
> > Verified in Emacs 29 emacs-mac and NS builds.
> 
> Thanks, should be fixed now on the master branch.

No further comments, so I presume the bug is indeed fixed, and I'm now
closing it.

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