From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Lennart Borgman (gmail)" Newsgroups: gmane.emacs.devel Subject: Re: Default font 'default have no corresponding variable Date: Mon, 18 Feb 2008 23:14:40 +0100 Message-ID: <47BA0350.3050601@gmail.com> References: <47B985B2.1070505@gmail.com> <87k5l2o0er.fsf@catnip.gol.com> <47B9AB51.7070002@gmail.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1203372922 20874 80.91.229.12 (18 Feb 2008 22:15:22 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 18 Feb 2008 22:15:22 +0000 (UTC) Cc: Emacs Devel , Jason Rumney To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Feb 18 23:15:46 2008 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 4.50) id 1JREGu-0006r6-7G for ged-emacs-devel@m.gmane.org; Mon, 18 Feb 2008 23:15:36 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1JREGP-0008TO-HD for ged-emacs-devel@m.gmane.org; Mon, 18 Feb 2008 17:15:05 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1JREGL-0008Ss-Nr for emacs-devel@gnu.org; Mon, 18 Feb 2008 17:15:01 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1JREGI-0008RL-1K for emacs-devel@gnu.org; Mon, 18 Feb 2008 17:15:01 -0500 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1JREGH-0008Qu-Lw for emacs-devel@gnu.org; Mon, 18 Feb 2008 17:14:57 -0500 Original-Received: from ch-smtp02.sth.basefarm.net ([80.76.149.213]) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1JREGC-0004f8-Cv; Mon, 18 Feb 2008 17:14:53 -0500 Original-Received: from c83-254-148-228.bredband.comhem.se ([83.254.148.228]:63155 helo=[127.0.0.1]) by ch-smtp02.sth.basefarm.net with esmtp (Exim 4.68) (envelope-from ) id 1JREG9-0006Wn-6X; Mon, 18 Feb 2008 23:14:49 +0100 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071031 Thunderbird/2.0.0.9 Mnenhy/0.7.5.666 In-Reply-To: X-Antivirus: avast! (VPS 080218-0, 2008-02-18), Outbound message X-Antivirus-Status: Clean X-Originating-IP: 83.254.148.228 X-Scan-Result: No virus found in message 1JREG9-0006Wn-6X. X-Scan-Signature: ch-smtp02.sth.basefarm.net 1JREG9-0006Wn-6X 56f10dc8fdf74fd408fe429eed8b7fb6 X-detected-kernel: by monty-python.gnu.org: Linux 2.6? (barebone, rare!) 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:89527 Archived-At: Stefan Monnier wrote: >>> Why should there be a "corresponding variable"? > >> Maybe I got this wrong, I thought that there usually were a variable with >> the same name as the face and that the variable value was the face >> symbol. But maybe that is just used for faces defined specific uses in >> Emacs libraries? > > No. The only there is w.r.t vars and faces is that font-lock's author > originally decided to provide both font-lock-FOO-face faces and > font-lock-FOO-face variables where the variable's value points to the > face, so that you can use > > font-lock-FOO-face > or > 'font-lock-FOO-face > > and get the same result. Basically it makes the font-lock-FOO-face > symbol (used to refer to the face) self-quoting. And since most > font-lock rules use the first form rather than the second, you get the > added benefit that the extra-indirection through the variable can be > made buffer-local so you can "change faces" on a buffer-by-buffer basis > (which is usually not possible in Emacs where faces can only be changed > on a frame-by-frame basis). > > In any case, buffer-local faces should be added to Emacs (there are > plans to do that, although they don't seem to be going anywhere, sadly), > and variables pointing to faces are generally deprecated unless maybe > they're used in font-lock rules where avoiding the ' can be > marginally convenient. Thanks Stefan and Jason, It seems like I have been misunderstanding this a bit more than I usually do ;-) Unfortunately I have been spreading my unwisdom a bit so I have to clear that out. >> But anyway, as I wrote, libraries written for XEmacs often tends to assume >> that the variable default exist (and points to a face symbol I believe). > > `xemacs -q' tells me that `default' indeed exists but has value "void". > Not sure what that means. It seems not to have any equivalent in Emacs. > I'd never heard of it until now, so it can't be that used "often". > > > Stefan >