GNU bug report logs - #33682
27.0.50; enriched-mode cannot save anonymous faces

Previous Next

Full log

Message #11 received at 33682 <at> debbugs.gnu.org (full text, mbox):

From: charles <at> aurox.ch (Charles A. Roelli)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 33682 <at> debbugs.gnu.org
Subject: Re: bug#33682: 27.0.50; enriched-mode cannot save anonymous faces
Date: Sun, 09 Dec 2018 17:35:28 +0100

> Date: Sun, 09 Dec 2018 14:55:39 +0200
> From: Eli Zaretskii <eliz <at> gnu.org>
> CC: 33682 <at> debbugs.gnu.org
>
> Thanks.
> 
> When setting colors and other properties in Enriched mode, you are
> supposed to use commands from facemenu.el (and/or the menu-bar menu
> items it produces, under Edit->Text Properties).
> 
> The immediate reason for the error is that you should do this instead:
> 
>   M-: (insert (propertize "foo" 'face '((:background "red")))) RET

Thanks for pointing this out.  So enriched mode can save a face
property which is a list of (possibly anonymous) faces, but it chokes
on a single anonymous face.  Is that documented somewhere?

> but I'm not sure we want to extend enriched.el to support arbitrary
> face specs.  What is the real-life use case for that?

Text created by other programs may not be aware of enriched mode's
limitations.  For example, here is an (abbreviated) version of how I
found this bug (from emacs-26):

C-x C-f test/manual/indent/css-mode.css
M-x enriched-mode RET y
C-x C-s

Evidently some text in CSS buffers is fontified with a single
anonymous face, which enriched mode does not support.  For a real-life
use case, if you copy some text from a CSS buffer and yank it in an
enriched mode buffer, the buffer can (temporarily) no longer be saved.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.