GNU bug report logs - #15437
24.3.50; mouse-face extends to an extra character when inside overlay after-string

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#15437: closed (24.3.50; mouse-face extends to an extra
 character when inside overlay after-string)
Date: Mon, 23 Sep 2013 09:20:03 +0000

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Your message dated Mon, 23 Sep 2013 12:19:54 +0300
with message-id <83y56nj3np.fsf <at> gnu.org>
and subject line Re: bug#15437: 24.3.50; mouse-face extends to an extra character when inside overlay	after-string
has caused the debbugs.gnu.org bug report #15437,
regarding 24.3.50; mouse-face extends to an extra character when inside overlay after-string
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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15437: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=15437
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From: Dmitry Gutov <dgutov <at> yandex.ru>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50; mouse-face extends to an extra character when inside overlay
 after-string
Date: Mon, 23 Sep 2013 04:47:55 +0300

1. Evaluate this definition:

(defun mouse-face-test ()
  (interactive)
  (goto-char (point-min))
  (insert "aaaaaaaa")
  (let ((o (make-overlay (point-min) (point))))
    (overlay-put o 'invisible t)
    (overlay-put o 'after-string
                 (concat (propertize "bbbb"
                                     'face 'next-error
                                     'mouse-face 'highlight)
                         "aaaa"))))

2. Open a new buffer, type `M-x mouse-face-test'.

3. Hover the mouse cursor above the "b" letters. When the cursor is
away, they're highlighted with the `next-error' face, and the "a"
letters are untouched. But when the mouse hovers, the first of the "a"
letters is also highlighted, with the `highlight' face. It shouldn't be.

In GNU Emacs 24.3.50.3 (x86_64-unknown-linux-gnu, GTK+ Version 3.6.4)
 of 2013-09-16 on axl
Bzr revision: 114298 dgutov <at> yandex.ru-20130915234226-zgv2u05owx40i0ig
Windowing system distributor `The X.Org Foundation', version 11.0.11303000
System Description:	Ubuntu 13.04

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 15437-done <at> debbugs.gnu.org
Subject: Re: bug#15437: 24.3.50;
 mouse-face extends to an extra character when inside
 overlay	after-string
Date: Mon, 23 Sep 2013 12:19:54 +0300

> From: Dmitry Gutov <dgutov <at> yandex.ru>
> Date: Mon, 23 Sep 2013 04:47:55 +0300
> 
> 
> 1. Evaluate this definition:
> 
> (defun mouse-face-test ()
>   (interactive)
>   (goto-char (point-min))
>   (insert "aaaaaaaa")
>   (let ((o (make-overlay (point-min) (point))))
>     (overlay-put o 'invisible t)
>     (overlay-put o 'after-string
>                  (concat (propertize "bbbb"
>                                      'face 'next-error
>                                      'mouse-face 'highlight)
>                          "aaaa"))))
> 
> 2. Open a new buffer, type `M-x mouse-face-test'.
> 
> 3. Hover the mouse cursor above the "b" letters. When the cursor is
> away, they're highlighted with the `next-error' face, and the "a"
> letters are untouched. But when the mouse hovers, the first of the "a"
> letters is also highlighted, with the `highlight' face. It shouldn't be.

Fixed in trunk revision 114439.

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