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

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ben Liblit <liblit <at> acm.org>
Subject: bug#16870: closed (Re: bug#16870: 24.3; "display" text property
 versus ":box" face attribute)
Date: Thu, 27 Feb 2014 17:45:04 +0000

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

Your bug report

#16870: 24.3; "display" text property versus ":box" face attribute

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 16870 <at> debbugs.gnu.org.

-- 
16870: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16870
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

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.

[Message part 3 (message/rfc822, inline)]

From: Ben Liblit <liblit <at> acm.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3; "display" text property versus ":box" face attribute
Date: Mon, 24 Feb 2014 15:18:07 -0600

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.


In GNU Emacs 24.3.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.18.9)
 of 2013-06-10 on mcgee.cs.wisc.edu
Windowing system distributor `Red Hat, Inc.', version 11.0.11300000
System Description:	Red Hat Enterprise Linux Server release 6.5 (Santiago)

Configured using:
 `configure '--prefix=/unsup/emacs-24.3/amd64_rhel6' '--without-pop'
 '--without-sound' '--with-gif=no''

Important settings:
  value of $LC_CTYPE: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=none
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Fundamental

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  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

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