From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/71936 Path: news.gmane.org!not-for-mail From: Hans Hagen Newsgroups: gmane.comp.tex.context Subject: Re: How do I test for empty labeltext? Date: Tue, 25 Oct 2011 12:14:45 +0200 Message-ID: <4EA68C15.4030709@wxs.nl> References: <4EA5B147.3060805@wxs.nl> Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1319537704 8034 80.91.229.12 (25 Oct 2011 10:15:04 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 25 Oct 2011 10:15:04 +0000 (UTC) Cc: mailing list for ConTeXt users To: Mojca Miklavec Original-X-From: ntg-context-bounces@ntg.nl Tue Oct 25 12:15:00 2011 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from balder.ntg.nl ([195.12.62.10]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1RIe25-0000yl-G3 for gctc-ntg-context-518@m.gmane.org; Tue, 25 Oct 2011 12:14:57 +0200 Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id F3B44CB090; Tue, 25 Oct 2011 12:14:56 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id JDK7+hFAF6IU; Tue, 25 Oct 2011 12:14:51 +0200 (CEST) Original-Received: from balder.ntg.nl (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 3F978CB085; Tue, 25 Oct 2011 12:14:51 +0200 (CEST) Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id A7588CB085 for ; Tue, 25 Oct 2011 12:14:50 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id ymtFs5Niqz4G for ; Tue, 25 Oct 2011 12:14:48 +0200 (CEST) Original-Received: from filter2-nij.mf.surf.net (filter2-nij.mf.surf.net [195.169.124.153]) by balder.ntg.nl (Postfix) with ESMTP id 34D51CB083 for ; Tue, 25 Oct 2011 12:14:48 +0200 (CEST) Original-Received: from smtp.ziggozakelijk.nl (D57D1DA2.static.ziggozakelijk.nl [213.125.29.162]) by filter2-nij.mf.surf.net (8.14.3/8.14.3/Debian-5+lenny1) with ESMTP id p9PAElRO029554 for ; Tue, 25 Oct 2011 12:14:47 +0200 X-Default-Received-SPF: pass (skip=loggedin (res=PASS)) x-ip-name=10.100.1.100; Original-Received: from [10.100.1.100] (unverified [10.100.1.100]) by pragma-net.nl (SurgeMail 5.3h2) with ESMTP (TLS) id 1574-1713362 for multiple; Tue, 25 Oct 2011 12:14:45 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 In-Reply-To: X-Authenticated-User: hagen@controller-9 X-Bayes-Prob: 0.0001 (Score 0, tokens from: @@RPTN) X-CanIt-Geo: ip=213.125.29.162; country=NL; region=11; city=Den Haag; latitude=52.0833; longitude=4.3000; http://maps.google.com/maps?q=52.0833,4.3000&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 0aFMWeLwq - 4f83da0ee506 - 20111025 X-Scanned-By: CanIt (www . roaringpenguin . com) on 195.169.124.153 X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.12 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: ntg-context-bounces@ntg.nl Errors-To: ntg-context-bounces@ntg.nl Xref: news.gmane.org gmane.comp.tex.context:71936 Archived-At: On 25-10-2011 11:26, Mojca Miklavec wrote: > On Mon, Oct 24, 2011 at 20:41, Hans Hagen wrote: >> On 24-10-2011 19:41, Mojca Miklavec wrote: >>> >>> Hello, >>> >>> The following code >>> >>> \setuplabeltext[test=] >>> test is \doifemptyelse{\labeltext{test}}{empty}{not empty} >>> >>> doesn't work as intended for the reasons that I approximately >>> understand (not exactly, but I understand that there might be a lot of >>> weird stuff returned when I ask for labeltext). However I have no idea >>> how to check if text is empty or not. >>> >>> As an exception :) :) :), MKIV hints should be highly appreciated and >>> enough for this particular application. >> >> an empty test is always somewhat special as there can be an unexpandable >> macro inside that eventually expands to nothing >> >> you can try \doiftextelse instead > > Thank you very much. This works fine. > > This should probably be added to > http://wiki.contextgarden.net/System_Macros/Branches_and_Decisions > at least (possibly to reference next to labels as well), but I'm not > sure how to describe it. "If you want to know if some macro provides some typeset content you can use the following helper macro:" ... ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________