GNU bug report logs - #74255
30.0.91; artist-mode right to left input introduces gaps

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

From: Van Ly <van.ly <at> SDF.ORG>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.91; artist-mode right to left input introduces gaps
Date: Fri, 08 Nov 2024 12:06:55 +0000

[Message part 1 (text/plain, inline)]

Hello,

Drawing a rectangle in artist-mode going in the directions

 . down
 . left to right
 . up
 . right to left

introduces gaps unexpectedly at the final closing top side.  See,

=> http://sdf.org/~van.ly/img/emacs-30-0-91-artist-mode-rectangle-draw.jpeg .

To demonstrate,

 1. start, emacs -Q
 2. open buffer and activate artist-mode
    a. C-x b a RET
    b. M-x artist-mode
 3. draw line going down
    a. C-c .
    b. type +, type 40 .
 4. draw line going left to right
    a. C-c >
    b. type +, type 40 .
 5. draw line going up
    a. C-c ^
    b. type +, type 40 .
 6. draw line going right to left
    a. C-c <
    b. type +, type 40 .
    c. gaps are introduced between sequences of .

Expected result is a rectangle with no gaps on the top side.

[x (application/octet-stream, attachment)]

[Message part 3 (text/plain, inline)]

-- 
vl

Message #8 received at 74255 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Van Ly <van.ly <at> SDF.ORG>
Cc: 74255 <at> debbugs.gnu.org
Subject: Re: bug#74255: 30.0.91;
 artist-mode right to left input introduces gaps
Date: Sun, 10 Nov 2024 11:03:43 +0200

> Date: Fri, 08 Nov 2024 12:06:55 +0000
> From:  Van Ly via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> Drawing a rectangle in artist-mode going in the directions
> 
>  . down
>  . left to right
>  . up
>  . right to left
> 
> introduces gaps unexpectedly at the final closing top side.  See,
> 
> => http://sdf.org/~van.ly/img/emacs-30-0-91-artist-mode-rectangle-draw.jpeg .
> 
> To demonstrate,
> 
>  1. start, emacs -Q
>  2. open buffer and activate artist-mode
>     a. C-x b a RET
>     b. M-x artist-mode
>  3. draw line going down
>     a. C-c .
>     b. type +, type 40 .
>  4. draw line going left to right
>     a. C-c >
>     b. type +, type 40 .
>  5. draw line going up
>     a. C-c ^
>     b. type +, type 40 .
>  6. draw line going right to left
>     a. C-c <
>     b. type +, type 40 .
>     c. gaps are introduced between sequences of .
> 
> Expected result is a rectangle with no gaps on the top side.

This was because in Emacs 25 picture-mode started to use string-width,
which is inaccurate when TAB characters are inserted into the buffer.

Now fixed on the emacs-30 release branch.

Message #13 received at 74255-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: van.ly <at> SDF.ORG
Cc: 74255-done <at> debbugs.gnu.org
Subject: Re: bug#74255: 30.0.91;
 artist-mode right to left input introduces gaps
Date: Sat, 23 Nov 2024 14:21:03 +0200

> Cc: 74255 <at> debbugs.gnu.org
> Date: Sun, 10 Nov 2024 11:03:43 +0200
> From: Eli Zaretskii <eliz <at> gnu.org>
> 
> > Date: Fri, 08 Nov 2024 12:06:55 +0000
> > From:  Van Ly via "Bug reports for GNU Emacs,
> >  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> > 
> > Drawing a rectangle in artist-mode going in the directions
> > 
> >  . down
> >  . left to right
> >  . up
> >  . right to left
> > 
> > introduces gaps unexpectedly at the final closing top side.  See,
> > 
> > => http://sdf.org/~van.ly/img/emacs-30-0-91-artist-mode-rectangle-draw.jpeg .
> > 
> > To demonstrate,
> > 
> >  1. start, emacs -Q
> >  2. open buffer and activate artist-mode
> >     a. C-x b a RET
> >     b. M-x artist-mode
> >  3. draw line going down
> >     a. C-c .
> >     b. type +, type 40 .
> >  4. draw line going left to right
> >     a. C-c >
> >     b. type +, type 40 .
> >  5. draw line going up
> >     a. C-c ^
> >     b. type +, type 40 .
> >  6. draw line going right to left
> >     a. C-c <
> >     b. type +, type 40 .
> >     c. gaps are introduced between sequences of .
> > 
> > Expected result is a rectangle with no gaps on the top side.
> 
> This was because in Emacs 25 picture-mode started to use string-width,
> which is inaccurate when TAB characters are inserted into the buffer.
> 
> Now fixed on the emacs-30 release branch.

No further comments, so I'm now closing this bug.

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