GNU bug report logs - #1220
overlay before- and after-string and mouse-face

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From: help-debbugs <at> gnu.org (Emacs bug Tracking System)
To: Chong Yidong <cyd <at> stupidchicken.com>
Subject: bug#1220: marked as done (overlay before- and after-string and
 mouse-face)
Date: Mon, 22 Jun 2009 02:00:05 +0000

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Your message dated Sun, 21 Jun 2009 21:55:34 -0400
with message-id <87ljnlrq09.fsf <at> stupidchicken.com>
and subject line Re: overlay before- and after-string and mouse-face
has caused the Emacs bug report #1220,
regarding overlay before- and after-string and mouse-face
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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From: Glenn Morris <rgm <at> gnu.org>
To: quiet <at> debbugs.gnu.org
Subject: overlay before- and after-string and mouse-face
Date: Tue, 21 Oct 2008 20:39:13 -0400

Package: emacs
Version: 23.0.60

This bug is extracted from #1176, which contained several issues.

The mouse-face property of an overlay with a display string does not
affect any before-string, but it does affect the after-string.

This can be worked around to some extent by copying the mouse-face
property to the before-string, but one cannot get the whole overlay
highlighted at one time.

Example:

(let ((buff (generate-new-buffer "overlay test"))
      o)
  (with-current-buffer buff
    (insert "text")
    (setq o (make-overlay (point-min) (point-max)))
    (overlay-put o 'mouse-face '(:background "green"))
    (overlay-put o 'display "display")
    (overlay-put o 'before-string "before string")
    (overlay-put o 'after-string "after string")
    (pop-to-buffer buff)))

"displayafter string" has mouse-face, but "before string" does not.

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From: Chong Yidong <cyd <at> stupidchicken.com>
To: 1220-done <at> debbugs.gnu.org
Subject: Re: overlay before- and after-string and mouse-face
Date: Sun, 21 Jun 2009 21:55:34 -0400

> The mouse-face property of an overlay with a display string does not
> affect any before-string, but it does affect the after-string.
>
> This can be worked around to some extent by copying the mouse-face
> property to the before-string, but one cannot get the whole overlay
> highlighted at one time.

I've checked a fix for this into the trunk.

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