From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Ted Zlatanov Newsgroups: gmane.emacs.devel Subject: Re: color-complement for defface Date: Thu, 10 Mar 2011 13:09:05 -0600 Organization: =?utf-8?B?0KLQtdC+0LTQvtGAINCX0LvQsNGC0LDQvdC+0LI=?= @ Cienfuegos Message-ID: <87tyfakd2m.fsf@lifelogs.com> References: <87oc6vm67v.fsf@stupidchicken.com> <87vd12z77n.fsf@stupidchicken.com> <87ipx289cu.fsf@nzebook.haselwarter.org> <871v3onlhy.fsf@keller.adm.naquadah.org> <87aaibisxh.fsf_-_@lifelogs.com> <87ipwmqyee.fsf@lifelogs.com> <877hctmb33.fsf@keller.adm.naquadah.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1299784186 8134 80.91.229.12 (10 Mar 2011 19:09:46 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 10 Mar 2011 19:09:46 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Mar 10 20:09:39 2011 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1PxlEw-0000Dm-Th for ged-emacs-devel@m.gmane.org; Thu, 10 Mar 2011 20:09:39 +0100 Original-Received: from localhost ([127.0.0.1]:42662 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PxlEw-0003mY-1h for ged-emacs-devel@m.gmane.org; Thu, 10 Mar 2011 14:09:38 -0500 Original-Received: from [140.186.70.92] (port=57652 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PxlEl-0003ks-T9 for emacs-devel@gnu.org; Thu, 10 Mar 2011 14:09:29 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PxlEk-0004Mi-IF for emacs-devel@gnu.org; Thu, 10 Mar 2011 14:09:27 -0500 Original-Received: from lo.gmane.org ([80.91.229.12]:57785) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PxlEk-0004MQ-AB for emacs-devel@gnu.org; Thu, 10 Mar 2011 14:09:26 -0500 Original-Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1PxlEe-0008T4-Fz for emacs-devel@gnu.org; Thu, 10 Mar 2011 20:09:20 +0100 Original-Received: from 38.98.147.130 ([38.98.147.130]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 10 Mar 2011 20:09:20 +0100 Original-Received: from tzz by 38.98.147.130 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 10 Mar 2011 20:09:20 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 29 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: 38.98.147.130 X-Face: bd.DQ~'29fIs`T_%O%C\g%6jW)yi[zuz6; d4V0`@y-~$#3P_Ng{@m+e4o<4P'#(_GJQ%TT= D}[Ep*b!\e,fBZ'j_+#"Ps?s2!4H2-Y"sx" User-Agent: Gnus/5.110014 (No Gnus v0.14) Emacs/24.0.50 (gnu/linux) Cancel-Lock: sha1:TtNOaxS1m2J10ZmebArW4gPwS28= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 80.91.229.12 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:137049 Archived-At: On Sun, 20 Feb 2011 18:44:04 +0100 Julien Danjou wrote: JD> Here's a very simple example on how to use it: JD> #+begin_src: emacs-lisp JD> (defface myface JD> (let ((color "red")) JD> `((((class color) (background light)) JD> (:foreground ,color)) JD> (((class color) (background dark)) JD> (:foreground ,(apply 'color-rgb->hex (color-complement color)))) JD> (t nil))) JD> "My face.") JD> #+end_src A patch that shows how to do this in lispref/display.texi is attached. I put it under the :foreground property documentation for `defface' but it's right next to the :background property too, so it should be obvious to a reader how to use it to do the opposite, setting the background to a complement. JD> Obviously, a new function/macro could be created to automate this use of JD> color-complement. The :foreground and background properties can only be a string currently, so it may be even simpler to allow them to be the form (complement "color-string"). That should be a clean extension. If not, I guess a function or a macro could do it too. Ted