From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: checking for light or dark background Date: Thu, 03 Feb 2022 05:19:53 +0100 Message-ID: <87y22sponq.fsf@zoho.eu> References: <838rut77h2.fsf@gnu.org> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31550"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:+andjKPSsEyH7zZU0NgndCGOOnk= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Feb 03 05:27:02 2022 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nFTi2-00080d-4o for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 03 Feb 2022 05:27:02 +0100 Original-Received: from localhost ([::1]:40132 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nFTi0-00007L-Mm for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 02 Feb 2022 23:27:00 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:36036) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nFTbJ-00034N-Kd for help-gnu-emacs@gnu.org; Wed, 02 Feb 2022 23:20:05 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:44468) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nFTbH-0000n3-GO for help-gnu-emacs@gnu.org; Wed, 02 Feb 2022 23:20:05 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1nFTbE-0009u5-5g for help-gnu-emacs@gnu.org; Thu, 03 Feb 2022 05:20:00 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:135683 Archived-At: Yuri Khan wrote: >> The problem I was having was that for Emacs 27.2, the >> command (frame--current-backround-mode nil) was not >> available. What is the recommendation for Emacs>=28. > > You should not rely on (frame--current-background-mode) even > if it is available. The double dash in its name tells you it > is a semi-private implementation detail, subject to change > at any time. You can access it, but when it changes and your > code breaks, you will get no support. The designation sure is "semi-private" since it is actually as public as any other `defun' available on the global no-namespace market ... As for what can change and what cannot, I think it is better to just change what is bad, into something good (or at least better), and focus on that rather than the supposed status of the symbol, as communicated by the presence or absence of a double dash ... -- underground experts united https://dataswamp.org/~incal