GNU bug report logs - #66023
outline-minor-mode-use-buttons depends on whitespace-space face for some reason

Previous Next

Full log

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Yilkal Argaw <yilkalargawworkneh <at> gmail.com>
To: bug-gnu-emacs <bug-gnu-emacs <at> gnu.org>
Subject: outline-minor-mode-use-buttons depends on whitespace-space face for
 some reason
Date: Sat, 16 Sep 2023 07:45:31 +0000

Hi,

I kind of make use of the relatively new outline-minor-mode-buttons
feature. I have specfic settings regarding whitespace mode and I
observed that hides the outline buttons deeper than level 2. Trying to
debug this I found that was related to the whitespace-space face and
but looking at outline.el gave me no hit's as to why that was the
reason. So I am filing this issue with the minimal configuration to
recreate the issue.

Emacs Version
GNU Emacs 29.1 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version
1.16.0, Xaw3d scroll bars)

The minimal config to create the issue is
(with-eval-after-load 'whitespace
  (setq whitespace-style (quote (face spaces tabs space-mark tab-mark)))
  (setq whitespace-display-mappings '((space-mark 32 [183] [46])
(tab-mark 9 [9655 9] [92 9]))))

(add-hook 'after-init-hook (global-whitespace-mode t))

(add-hook 'prog-mode-hook 'outline-minor-mode t)

(add-hook 'outline-minor-mode-hook
            (setq outline-minor-mode-use-buttons 't
                     outline-minor-mode-cycle 't
                     outline-minor-mode-cycle-filter 'bolp))

(custom-fset-faces `(whitespace-space ((t (:foreground
,(face-background 'default) :background nil))))
                               `(whitespace-tabs ((t (:foreground
,(face-background 'default) :background nil)))))


After that try and open code a python or ruby class that has method
inside it. It can be clearly seen that the outline-buttons for the
methods exist but are hidden because they are somehow affected by
whitespace-space face. (Marking the code shows that the buttons exist
but are hidden). I hope this helps in recreating the issue it was hard
to explain because it was very specific.

With Regards
Yilkal Argaw

Previous Next

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