GNU bug report logs - #16870
24.3; "display" text property versus ":box" face attribute

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Message #10 received at 16870-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Ben Liblit <liblit <at> acm.org>
Cc: 16870-done <at> debbugs.gnu.org
Subject: Re: bug#16870: 24.3;
 "display" text property versus ":box" face attribute
Date: Thu, 27 Feb 2014 19:44:53 +0200

> Date: Mon, 24 Feb 2014 15:18:07 -0600
> From: Ben Liblit <liblit <at> acm.org>
> 
> If a range of text carries the "display" text property and also has its 
> "face" text property set to something with the ":box" attribute, then 
> the right edge of the box is not actually drawn.  The following elisp 
> code fragment demonstrates the problem:
> 
>      (let ((buffer (generate-new-buffer "*bug*")))
>        (set-buffer buffer)
>        (insert "lorem ipsum dolor\n\nlorem ipsum dolor\n")
>        (put-text-property 7 12 'display "xxxxx")
>        (put-text-property 7 12 'face '(:box t))
>        (put-text-property 26 31 'face '(:box t))
>        (switch-to-buffer-other-window buffer))
> 
> Observe that on the first line, the displayed "xxxxx" replacement text 
> has only three box edges drawn: top, left, and bottom.  The right edge 
> is missing.  By contrast, the second line of text has no "display" text 
> property set and shows a proper box with all four edges.

Thanks, I fixed this in trunk revision 116585.

For the record: this bug was there since Emacs 21.1, when the 'box'
face was first introduced.

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