From: Eli Zaretskii <eliz@gnu.org>
To: Akib Azmain Turja <akib@disroot.org>
Cc: 59841@debbugs.gnu.org
Subject: bug#59841: 29.0.50; 'before-string' text property doesn't work
Date: Mon, 05 Dec 2022 21:41:42 +0200 [thread overview]
Message-ID: <834ju98wp5.fsf@gnu.org> (raw)
In-Reply-To: <87sfhtya77.fsf@disroot.org> (bug-gnu-emacs@gnu.org)
> Date: Tue, 06 Dec 2022 00:30:52 +0600
> From: Akib Azmain Turja via "Bug reports for GNU Emacs,
> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>
> The 'Display Margins' node of Emacs Lisp manual says to put
> 'before-string' on text to use the marginal area (is this the correct
> term?) while not altering buffer text. But 'before-string' text
> property doesn't work.
>
> Steps: 1. Open a clean fundamental mode buffer.
> 2. (insert (propertize "foo" 'before-string "bar"))
> 3. The buffer shows only "foo", but not "bar" before it.
The code is incorrect: 'before-string' is an overlay property, not a text
property. So you need to define an overlay with a 'before-string' property
whose value is a string, and put a 'display' property on that string.
And if you want the 'display' property to show text in the margin, you need
also to use set-window-margins to setup the margin.
next prev parent reply other threads:[~2022-12-05 19:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-05 18:30 bug#59841: 29.0.50; 'before-string' text property doesn't work Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-12-05 19:41 ` Eli Zaretskii [this message]
2022-12-06 4:34 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-12-06 12:19 ` Eli Zaretskii
2022-12-07 15:38 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-12-07 18:08 ` Eli Zaretskii
2022-12-08 4:34 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-12-13 1:04 ` Stefan Kangas
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