GNU bug report logs - #59141
28.1.90; Face :extend when all the line but trailing \n is invisible

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Message #137 received at 59141 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Juri Linkov <juri <at> linkov.net>
Cc: 59141 <at> debbugs.gnu.org, yantar92 <at> posteo.net, abdo.haji.ali <at> gmail.com,
 kevin.legouguec <at> gmail.com
Subject: Re: bug#59141: 28.1.90; Face :extend when all the line but trailing
 \n is invisible
Date: Tue, 22 Nov 2022 17:02:53 +0200

> From: Juri Linkov <juri <at> linkov.net>
> Cc: 59141 <at> debbugs.gnu.org,  Eli Zaretskii <eliz <at> gnu.org>,  Abdul-Lateef
>  Haji-Ali <abdo.haji.ali <at> gmail.com>,  yantar92 <at> posteo.net
> Date: Tue, 22 Nov 2022 09:52:40 +0200
> 
> > we could add ellipses in a more clean way: as a new value of the user
> > option 'outline-minor-mode-use-buttons'.  So when it's customized to
> > 'ellipsis', the ellipsis overlay will be created in a new pcase branch
> > in outline--insert-button.
> 
> Unfortunately, this is not possible to do because of a bug
> in overlay handling.  Here is a short test case:
> 
> (progn
>   (insert "ab")
>   (let ((o (make-overlay 1 2)))
>     (overlay-put o 'after-string "!"))
>   (let ((o (make-overlay 2 3)))
>     (overlay-put o 'invisible t)))
> 
> The problem is that "!" from 'after-string' is not displayed,
> even when it's on the text that is not invisible.

There's no bug here.  after-string is displayed when the end position of the
overlay is reached, and in this case the end position is invisible, so it is
skipped.

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