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From: Stefan Monnier <monnier@HIDDEN>
To: nljlistbox2@HIDDEN (N. Jackson)
Subject: Re: bug#16974: 24.3.50;
[Wishlist] Feature to automatically adjust foreground/background
colours when contrast below some threshold
Message-ID: <jwv7g82davw.fsf-monnier+emacsbugs@HIDDEN>
References: <8761nnl6yd.fsf@HIDDEN>
Date: Sun, 09 Mar 2014 22:52:29 -0400
In-Reply-To: <8761nnl6yd.fsf@HIDDEN> (N. Jackson's message of
"Sun, 09 Mar 2014 12:36:42 -0300")
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> Such a feature was proposed (and, IIUC, prototyped) in the discussion of
> the bizarrely named :distant-foreground face attribute on the
> emacs-devel list around the 7th of January (2014). There it met with the
> objection that nothing should ever override any of a user's
> settings. However, if the user wants their settings overridden in certain
> circumcstances, then it seems unreasonable to deny them that.
Agreed. I think the way to fix this is:
- Add some hook in the C code that "realizes" faces so that Lisp code
can tweak the result.
- Write a new package which uses this hook to get the above result.
Stefan
bug-gnu-emacs@HIDDEN:bug#16974; Package emacs.
Full text available.Received: (at submit) by debbugs.gnu.org; 9 Mar 2014 15:37:14 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Mar 09 11:37:14 2014 Received: from localhost ([127.0.0.1]:58291 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1WMfmr-0005Xl-Vz for submit <at> debbugs.gnu.org; Sun, 09 Mar 2014 11:37:14 -0400 Received: from eggs.gnu.org ([208.118.235.92]:41145) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <nljlistbox2@HIDDEN>) id 1WMfmp-0005Xc-6X for submit <at> debbugs.gnu.org; Sun, 09 Mar 2014 11:37:11 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <nljlistbox2@HIDDEN>) id 1WMfmg-0003nb-8F for submit <at> debbugs.gnu.org; Sun, 09 Mar 2014 11:37:10 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_50, FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,T_DKIM_INVALID autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:38303) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <nljlistbox2@HIDDEN>) id 1WMfmg-0003nW-56 for submit <at> debbugs.gnu.org; Sun, 09 Mar 2014 11:37:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42812) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <nljlistbox2@HIDDEN>) id 1WMfmX-0004Ef-Nj for bug-gnu-emacs@HIDDEN; Sun, 09 Mar 2014 11:37:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <nljlistbox2@HIDDEN>) id 1WMfmP-0003lS-Bu for bug-gnu-emacs@HIDDEN; Sun, 09 Mar 2014 11:36:53 -0400 Received: from mail-qg0-x22b.google.com ([2607:f8b0:400d:c04::22b]:50912) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <nljlistbox2@HIDDEN>) id 1WMfmP-0003lE-70 for bug-gnu-emacs@HIDDEN; Sun, 09 Mar 2014 11:36:45 -0400 Received: by mail-qg0-f43.google.com with SMTP id f51so1527032qge.2 for <bug-gnu-emacs@HIDDEN>; Sun, 09 Mar 2014 08:36:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:subject:date:message-id:mime-version:content-type; bh=KM1Q1ZFfyMzs8n2txYZrYj0aVl+N42isePhy9U6miNg=; b=nkRLXsJovp2HLXRSJjj6edUerCE8E2J+wV69Ss2SBoOtczxgnD0AN+wVO8hJ/E9+KP MF9j+Sb/sV/wSGOt+ePwIY8Uepppd9wtAZflNXGAb6cRqmg3LSdlpFbt3WecGwSRskTo 2EKtYj+FzNq7VZK5caDEYwM5fLyovTQMJ4pTHUOljoduTchP5HeX2y7NdvSy+G88d30i wj6gH6CTZvepKfFW5uHj2lq/tiDeqjfC5DVtWTE5g3WuY/zB4O4WLmrwgSlcVMHI66qO qgSXBZNC812xCOUE9XQb4QcwYqLyXXsgmH1dcZItA0MOmqSnB6xSEQ5BNEXFDTPQlj/7 tDZg== X-Received: by 10.140.31.247 with SMTP id f110mr33082079qgf.58.1394379404564; Sun, 09 Mar 2014 08:36:44 -0700 (PDT) Received: from moondust.localdomain.nodomain.none (T8731.WPA.Dal.Ca. [134.190.135.49]) by mx.google.com with ESMTPSA id b16sm49327645qag.14.2014.03.09.08.36.43 for <bug-gnu-emacs@HIDDEN> (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 09 Mar 2014 08:36:44 -0700 (PDT) From: nljlistbox2@HIDDEN (N. Jackson) To: bug-gnu-emacs@HIDDEN Subject: 24.3.50; [Wishlist] Feature to automatically adjust foreground/background colours when contrast below some threshold Date: Sun, 09 Mar 2014 12:36:42 -0300 Message-ID: <8761nnl6yd.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -3.8 (---) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.8 (---) Wishlist: It would be very useful to have a feature that automatically adjusts the foreground and background colours when the contrast between them is below some threshold value (in some reasonably meaningful units -- perhaps a percentage), while keeping the colours as close as possible to their unadjusted values. Such a feature was proposed (and, IIUC, prototyped) in the discussion of the bizarrely named :distant-foreground face attribute on the emacs-devel list around the 7th of January (2014). There it met with the objection that nothing should ever override any of a user's settings. However, if the user wants their settings overridden in certain circumcstances, then it seems unreasonable to deny them that. Presumably there would be two variables: a Boolean `auto-adjust-contrast' and a numeric `auto-adjust-contrast-threshold' (or names to that effect). The first variable could be eliminated with the convention that the feature be disabled when the threshold variable is set to zero.
nljlistbox2@HIDDEN (N. Jackson):bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#16974; Package emacs.
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