From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/80168 Path: news.gmane.org!not-for-mail From: Hans Hagen Newsgroups: gmane.comp.tex.context Subject: Re: Node for startbuffer. Date: Wed, 09 Jan 2013 16:30:19 +0100 Message-ID: <50ED8D0B.8030708@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="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1357745425 7152 80.91.229.3 (9 Jan 2013 15:30:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 9 Jan 2013 15:30:25 +0000 (UTC) To: mailing list for ConTeXt users Original-X-From: ntg-context-bounces@ntg.nl Wed Jan 09 16:30:41 2013 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from balder.ntg.nl ([195.12.62.10]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Tsxc0-00016j-K4 for gctc-ntg-context-518@m.gmane.org; Wed, 09 Jan 2013 16:30:40 +0100 Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 3E44C101EE; Wed, 9 Jan 2013 16:30:24 +0100 (CET) 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 AHfRlnj0-p2Z; Wed, 9 Jan 2013 16:30:21 +0100 (CET) Original-Received: from balder.ntg.nl (localhost [IPv6:::1]) by balder.ntg.nl (Postfix) with ESMTP id 9406F101E6; Wed, 9 Jan 2013 16:30:21 +0100 (CET) Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id E30BE101E6 for ; Wed, 9 Jan 2013 16:30:19 +0100 (CET) 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 KYYlBbew8tFN for ; Wed, 9 Jan 2013 16:30:19 +0100 (CET) Original-Received: from filter1-til.mf.surf.net (filter1-til.mf.surf.net [194.171.167.217]) by balder.ntg.nl (Postfix) with ESMTP id F0CC9101E5 for ; Wed, 9 Jan 2013 16:30:18 +0100 (CET) Original-Received: from smtp.ziggozakelijk.nl (D57D1DA2.static.ziggozakelijk.nl [213.125.29.162]) by filter1-til.mf.surf.net (8.14.3/8.14.3/Debian-9.4) with ESMTP id r09FUHnR014133 for ; Wed, 9 Jan 2013 16:30:17 +0100 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 2642-1713362 for multiple; Wed, 09 Jan 2013 16:30:14 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.2; rv:17.0) Gecko/20130107 Thunderbird/17.0.2 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; latitude=52.5000; longitude=5.7500; http://maps.google.com/maps?q=52.5000,5.7500&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 0RIJPuhSx - ef117e279ab2 - 20130109 (trained as not-spam) X-Scanned-By: CanIt (www . roaringpenguin . com) on 194.171.167.217 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:80168 Archived-At: On 1/9/2013 2:54 PM, Andre Caldas wrote: > Hello! > > Given some > > \startbuffer > Blah, blah, blah... > \stopbuffer > > I'd like to get a "node tree" corresponding to how the buffer would be > processed at a given point. Using luatex, I'd like to identify certain > sub-nodes and change their attributes (to be specific: transparency). > > Any hint on how to do it? here's an example (I'll add it to the cld manual): \starttext \definecolor[mytransparency][a=1,t=.5] \startluacode local enabled = false local count = 0 function userdata.processmystuff(head) if enabled then count = count + 1 for n in node.traverse(head) do logs.report("node","run %s: %s",count,n) if count % 2 == 0 then nodes.tracers.transparencies.set(n,"mytransparency") end end return head, true end return head, false end function userdata.enablemystuff() enabled = true end function userdata.disablemystuff() enabled = false end nodes.tasks.appendaction("processors", "normalizers", "userdata.processmystuff") \stopluacode \startbuffer whatever \hbox{you} want \stopbuffer \ctxlua{userdata.enablemystuff()} \par \getbuffer \par \ctxlua{userdata.disablemystuff()} \stoptext > Also, are there any good examples on how to use "nodes"? all over context ... 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 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 ___________________________________________________________________________________