From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.org!not-for-mail
From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.help
Subject: Re: Background color in terminal
Date: Wed, 09 May 2007 06:11:11 +0300
Message-ID: <uirb21yk0.fsf@gnu.org>
References: <m2irb3rw1u.fsf@sl392.st-edmunds.cam.ac.uk> <uodkv16q2.fsf@gnu.org>
	<m2vef226cw.fsf@sl392.st-edmunds.cam.ac.uk>
NNTP-Posting-Host: lo.gmane.org
X-Trace: sea.gmane.org 1178680285 13266 80.91.229.12 (9 May 2007 03:11:25 GMT)
X-Complaints-To: usenet@sea.gmane.org
NNTP-Posting-Date: Wed, 9 May 2007 03:11:25 +0000 (UTC)
To: help-gnu-emacs@gnu.org
Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed May 09 05:11:24 2007
Return-path: <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org>
Envelope-to: geh-help-gnu-emacs@m.gmane.org
Original-Received: from lists.gnu.org ([199.232.76.165])
	by lo.gmane.org with esmtp (Exim 4.50)
	id 1HlcaJ-0005QI-Vd
	for geh-help-gnu-emacs@m.gmane.org; Wed, 09 May 2007 05:11:24 +0200
Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43)
	id 1HlchS-0003LY-Vj
	for geh-help-gnu-emacs@m.gmane.org; Tue, 08 May 2007 23:18:47 -0400
Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1HlchG-0003LT-He
	for help-gnu-emacs@gnu.org; Tue, 08 May 2007 23:18:34 -0400
Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1HlchF-0003LH-5P
	for help-gnu-emacs@gnu.org; Tue, 08 May 2007 23:18:33 -0400
Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1HlchE-0003LE-Uq
	for help-gnu-emacs@gnu.org; Tue, 08 May 2007 23:18:32 -0400
Original-Received: from heller.inter.net.il ([213.8.233.23])
	by monty-python.gnu.org with esmtp (Exim 4.60)
	(envelope-from <eliz@gnu.org>) id 1Hlca4-000262-Ux
	for help-gnu-emacs@gnu.org; Tue, 08 May 2007 23:11:09 -0400
Original-Received: from HOME-C4E4A596F7 (IGLD-84-228-47-171.inter.net.il
	[84.228.47.171]) by heller.inter.net.il (MOS 3.7.3a-GA)
	with ESMTP id CNT17476 (AUTH halo1);
	Wed, 9 May 2007 06:11:07 +0300 (IDT)
In-reply-to: <m2vef226cw.fsf@sl392.st-edmunds.cam.ac.uk> (message from Leo on
	Wed, 09 May 2007 01:22:39 +0100)
X-detected-kernel: FreeBSD 4.7-5.2 (or MacOS X 10.2-10.4) (2)
X-BeenThere: help-gnu-emacs@gnu.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Users list for the GNU Emacs text editor <help-gnu-emacs.gnu.org>
List-Unsubscribe: <http://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/help-gnu-emacs>
List-Post: <mailto:help-gnu-emacs@gnu.org>
List-Help: <mailto:help-gnu-emacs-request@gnu.org?subject=help>
List-Subscribe: <http://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=subscribe>
Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org
Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org
Xref: news.gmane.org gmane.emacs.help:43821
Archived-At: <http://permalink.gmane.org/gmane.emacs.help/43821>

> From: Leo <sdl.web@gmail.com>
> Date: Wed, 09 May 2007 01:22:39 +0100
> Cc: help-gnu-emacs@gnu.org
> 
> >> From: Leo <sdl.web@gmail.com>
> >> Date: Tue, 08 May 2007 19:48:29 +0100
> >> 
> >> It seems Emacs is assuming background types (dark or light) according
> >> to terminal types.
> >
> > Only on character (i.e. text-mode) terminals, since there's no
> > standard API to query them for their default background color.
> >
> >> Now I have one terminal screen-256color. Emacs thinks it is dark
> >> background when it is actually light background. How can I correct
> >> this?
> >
> > I think you want to customize the variable frame-background-mode,
> > which see.
> 
> Can I make Emacs automatically examine the brightness? 

Like I said above: we don't know about any standard API to do that on
a tty.  If you do, please tell Emacs developers about such an API.