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From: Eshel Yaron via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Spencer Baugh <sbaugh@janestreet.com>, 63825@debbugs.gnu.org
Subject: bug#63825: 29.0.90; The header line should be hidden when empty
Date: Thu, 01 Jun 2023 19:45:39 +0300	[thread overview]
Message-ID: <m15y87jfm4.fsf@eshelyaron.com> (raw)
In-Reply-To: <838rd3cg7u.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 01 Jun 2023 19:14:29 +0300")

Eli Zaretskii <eliz@gnu.org> writes:

> header-line-format supports :eval and :when, so why cannot
> which-function-mode use those to yield nil when there's nothing to
> show?

I thought so as well, but it seems that the header line is displayed
even when the value of `header-line-format` yields nil, if it isn't
plain nil.

So this shows an empty header line:

--8<---------------cut here---------------start------------->8---
(setq-default header-line-format '(:eval nil))
--8<---------------cut here---------------end--------------->8---

(In Emacs master with -Q.)






  reply	other threads:[~2023-06-01 16:45 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-01 13:37 bug#63825: 29.0.90; The header line should be hidden when empty Spencer Baugh
2023-06-01 16:14 ` Eli Zaretskii
2023-06-01 16:45   ` Eshel Yaron via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2023-06-01 17:37     ` Spencer Baugh
2023-06-01 18:46     ` Eli Zaretskii
2023-06-01 20:22       ` Spencer Baugh
2023-06-02  6:19         ` Eshel Yaron via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-06-02 11:36           ` Eli Zaretskii
2023-06-02 18:53             ` Eshel Yaron via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-06-03  5:44               ` Eli Zaretskii
2023-06-03  7:28                 ` Eshel Yaron via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-06-04  7:03                   ` Eli Zaretskii
2023-06-04 16:45                     ` Eshel Yaron via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-06-06 12:18                       ` Eli Zaretskii
2023-06-06 12:28                         ` Eshel Yaron via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-06-02  6:23         ` Eli Zaretskii

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