From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/81612 Path: news.gmane.org!not-for-mail From: Hans Hagen Newsgroups: gmane.comp.tex.context Subject: Re: Number of pages by Lua of a figure to be inserted? Date: Wed, 10 Apr 2013 17:38:33 +0200 Message-ID: <51658779.2060402@wxs.nl> References: Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-2"; Format="flowed" Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1365608358 5710 80.91.229.3 (10 Apr 2013 15:39:18 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 10 Apr 2013 15:39:18 +0000 (UTC) To: mailing list for ConTeXt users Original-X-From: ntg-context-bounces@ntg.nl Wed Apr 10 17:39:22 2013 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from [195.12.62.10] (helo=balder.ntg.nl) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1UPx7J-0002Vn-G2 for gctc-ntg-context-518@m.gmane.org; Wed, 10 Apr 2013 17:39:21 +0200 Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 81F8A10443; Wed, 10 Apr 2013 17:38:58 +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 AuAKGABe0yB1; Wed, 10 Apr 2013 17:38:55 +0200 (CEST) Original-Received: from balder.ntg.nl (localhost [IPv6:::1]) by balder.ntg.nl (Postfix) with ESMTP id C8CE11042D; Wed, 10 Apr 2013 17:38:55 +0200 (CEST) Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 0BAED1042D for ; Wed, 10 Apr 2013 17:38:55 +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 obLV7S2ab+Wc for ; Wed, 10 Apr 2013 17:38:50 +0200 (CEST) Original-Received: from filter1-utr.mf.surf.net (filter1-utr.mf.surf.net [195.169.124.152]) by balder.ntg.nl (Postfix) with ESMTP id 240C710418 for ; Wed, 10 Apr 2013 17:38:49 +0200 (CEST) Original-Received: from smtp.ziggozakelijk.nl (D57D1DA2.static.ziggozakelijk.nl [213.125.29.162]) by filter1-utr.mf.surf.net (8.14.3/8.14.3/Debian-9.4) with ESMTP id r3AFcm6N011238 for ; Wed, 10 Apr 2013 17:38:49 +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 6.1c) with ESMTP (TLS) id 15354-1713362 for multiple; Wed, 10 Apr 2013 17:38:24 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.2; rv:17.0) Gecko/20130307 Thunderbird/17.0.4 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=15; city=Zwolle; latitude=52.5058; longitude=6.0858; http://maps.google.com/maps?q=52.5058,6.0858&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 07JmfCMo5 - a83d945a2b59 - 20130410 (trained as not-spam) X-Scanned-By: CanIt (www . roaringpenguin . com) X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.14 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ntg-context-bounces@ntg.nl Original-Sender: ntg-context-bounces@ntg.nl Xref: news.gmane.org gmane.comp.tex.context:81612 Archived-At: On 4/10/2013 4:22 PM, Proch=E1zka Luk=E1=B9 Ing. - Pontex s. r. o. wrote: > Hello, > > I need to identify number of pages by Lua of an image which is to be > inserted. > > The image can be of all various types supported by Ctx - e.g. .png, .pdf. > > I've been using the following code so far (based on a mailing thread in > the past): > > ---- > function nOfPages(fn) > local fig =3D figures.push{name =3D fn} > local info =3D figures.identify() > > figures.check() > > local n =3D fig.used.pages inspect(fig) > figures.pop() > > return n > end > ---- > > But the code above break Ctx in the case that the image doesn't exist. > > I'd need to modify the solution somehow so to return 'nil' or 'false' > (or a error message) in the case the file was not found. > > How to do it? there's a status table in fig Hans ----------------------------------------------------------------- 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 t= he Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-cont= ext webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________= ________