August 2012 - ntg-context - NTG Mailing Lists

Lua: document v. userdata
by Rogers, Michael K 22 Aug '12

22 Aug '12

In a recent thread, Hans used the document namespace, where I (naively) expected userdata: On Aug 22, 2012, at 6:32 AM, Hans Hagen wrote: \ctxlua{document.myluadimension = "200pt"} Is there a reason not to use userdata.myluadimension? Or is document.myluadimension safe, because myluadimension is almost certainly not an entry used by ConTeXt? Is using document.myluadimension better "style" here, in some sense? Somewhere I had gotten the idea that if a ConTeXt user wanted to store something in Lua, they ought to store it in the userdata namespace. Thanks, Michael ________________________________ This e-mail message (including any attachments) is for the sole use of the intended recipient(s) and may contain confidential and privileged information. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this message (including any attachments) is strictly prohibited. If you have received this message in error, please contact the sender by reply e-mail message and destroy all copies of the original message (including attachments).

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Struggling with ConTeXt
by Olivier Binda 22 Aug '12

22 Aug '12

Hello I'm trying to port a big 300+ pages math course full of macros from plain XeTEX to ConTeXt mark IV (ubuntu 12.04+ stand alone beta) and I'm having some difficulties, could you please help ? My questions : 1) does lxml.att("#1","some tag") really work ? the next snipet doesn't work for me: \startluacode function set(node) p = lxml.att(node,"p") -- or p = lxml.att(lxml.id(node),"p") end \stopluacode \startxmlsetups xml:section \ctxlua{set("#1")} \stopxmlsetups it looks like it returns the p attribute of the node before #1 the following snipet works though (which is strange because I looked in the context source and it gives \def\xmlatt#1#2{\ctxlua{lxml.att("#1","#2")}}...) \startxmlsetups xml:section \ctxlua{p = \xmlatt{"#1","p"}} \stopxmlsetups 2) I'm trying to export to xml and have set \setupbackend[export=yes, xhtml=yes, css=mkiv-export.css] But a) my Metafun/Tikz pictures aren't exported to svg :/ b) the exported xml has namespaces problems (like error on line 63 at column 20: Namespace prefix m on math is not defined error on line 64 at column 22: Namespace prefix m on mrow is not defined) What am I doing wrong ? (I'm compiling with "context mydoc.tex") Is there some \csname tex4ht\endcsname command or some other directive that I should use to get my xml export right ? Am I missing some namespace commands (there are lots of m:math and m:mrow mathml tags int the exported xml source, this smells like a tex4ht issue) 3) I have defined some framed text with metafun overlays (like in the Context manual) and I'm trying to type something like \inmargin{some label} \startMyFramedText...\stopMyFramedText Yet, the text in the margin is after the framed text :( (fiddling with the "location" setting (low, ..) doesn't allow me to have the in margin text right next the top of the framed text I somehow found a dirty workaround with typing a blank space \defineframedtext[Property][frame=off,background=OverlayProperty,before={}] and \inmargin{some label}\noindent\startMyFramedText...\stopMyFramedText but it's not really satisfying. (hate to lose vertical space with wandering blank spaces) Is there a better way ? 4) I'm trying to port the following TeX code to ConTeXt $$\eqalign{x&=1\cr y&=2\cr}\qquad \hbox{haha}$$ it looks like \startformula\startalign.. doesn't allow me to do that I somehow managed to have it by typing \startformula \vcenter{\starttabular[|rM|lM|] \NC x \NC =1\NC\NR \NC y \NC =2\NC\NR \stoptabular}\qquad\text{haha} \stopformula the pdf export is fine, but the xml export is awfull (because of \vcenter I guess) a) Is there a way to use tables inside math mode alongside other stuff (would be handy) ? b) what is the correct way to type the previous text, so the pdf and xml are fine in Context ? Best regards Olivier... really enjoying utf, xml, lua inside TeX as well as other nice ConTeXt features

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subformulas: error in latest beta
by Andreas Mang 21 Aug '12

21 Aug '12

Dear all, I am having problems with subformulas. The following example does not display a subnumber (i.e. I get (1) and (2) instead of (1a) and (1b)): %%%%%%%%%%%%% start example %%%%%%%%%%%% \starttext % from % does not display "subformula numbers"" \placesubformula \startformula \startalign \NC a_1 x + b_1 y \NC = c_1 \NR[+][a] \NC a_2 x + b_2 y \NC = c_2 \NR[+][b] \stopalign \stopformula %%%%%%%%%%%%% stop example %%%%%%%%%%%%% This example is taken from http://dl.contextgarden.net/myway/mathalign.pdf page 6 I am not quite sure for how long this is not working. I have been using the following alternative, which used to work but now gives me an error with the latest beta (ConTeXt ver: 2012.08.16 22:20 MKIV fmt: 2012.8.18): %%%%%%%%%%%%% start example %%%%%%%%%%%% % the following used to work in an earlier version \startsubformulas[eq:ax=b] \placeformula \startformula \startalign \NC a_1 x + b_1 y \NC = c_1 \NR[+][a] \NC a_2 x + b_2 y \NC = c_2 \NR[+][b] \stopalign \stopformula \stoptext %%%%%%%%%%%%% stop example %%%%%%%%%%%%% Any suggestions? Cheers, Andreas

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Stable versions of MkIV
by Sietse Brouwer 21 Aug '12

21 Aug '12

Hi all, The "current stable" MkIV, the MkIV on the wiki, and the MkIV in TeX Live are quite different things. MkIV 2011.005.18 -- result of first-setup.sh --current MkIV 2011.10.008 -- version on the wiki MkIV 2012.005.29 -- version in TeX Live 2012, AFAICT (Mojca?) 1. Why not declare the version in TeX Live to be stable? I know Mojca puts some work into making it as bug-free as possible. 2. Perhaps have the MkIV on the wiki track the MkIV in TeXlive? We can show off reasonably-recent features, it looks more up-to-date, it's a nice clear answer to "should we update already?", and it ensures that we update to reasonably bug-free versions. 3. Is there a list of past stable versions somewhere? I can't find one, and without it the ability to go to a specific stable version with `sh ./first-setup.sh --context=date` seems a bit useless. (Can't really imagine a use in general, though.) 4. (Less important.) context.mkiv defines \contextversion as e.g. `2012.08.11 14:11`, but \contextversionnumber in mult-ini.mkiv still prepends a zero to the month or day. (It checks whether 08 < 10, which is true even if the leading zero is present.) This causes the extra zeros you saw in the version numbers above. Can this be changed without breakage ensuing? I expect that nobody depends on it over the more direct \contextversion. (People that do use \contextversionnumber have a problem anyway, because the version strings it produces in October-December will always turn out 'earlier/older' than the ones produced in January-September, regardless of year.) Cheers, Sietse

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test for (negative) number
by Peter Rolf 21 Aug '12

21 Aug '12

Hi, I used '\doifnumberelse' to validate some macro parameters (angle). Sadly it does not work with negative numbers. Is there a similar macro, that also supports negative values? Example: \doifnumberelse {45}{yes}{no}% yes \doifnumberelse{-45}{yes}{no}% no Greetings, Peter

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Runtime Error (TeXLive and ConTeXt )
by Hrothgar Boyce 21 Aug '12

21 Aug '12

TeXLive Version: 2012 ("--all" updated to August 20th, 2012) Platform: CYGWIN_NT-6.0 1.7.16(0.262/5/3) 2012-07-20 22:55 The attempted command which ends in an error is: texexec -o pdf 659-water-stations.tex This results in: "PANIC: unprotected error in call to Lua API (zlib library version does not match - header: 1.2.5, library: 1.2.7)" However /usr/include/zlib.h is for version 1.2.7, not the 1.2.5 mentioned in the error message. Any idea of how to fix this, so I can run ConTexT? Thanks for any and all help.

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How to know in which page I'm?
by Xan 21 Aug '12

21 Aug '12

Hi, I want to print a message depending if the page is even or odd. In pseudocode: \if \inpage.\iseven { This page is even } \else { This page is odd } How can I do that in ConTeXt? Thanks in advance, Xan. PS: Please, CCme

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Problem with SETUPTEX and KSH93
by Alessandro Perucchi 20 Aug '12

20 Aug '12

On Mon, Aug 20, 2012 at 12:34 PM, Mojca Miklavec wrote: > >Can you please try again? > >Mojca Hello Mojca, thanks :-) it works wonderfully! Now, I don't have to patch setuptex each time I'm updating ConTeXt :-D Sincerely yours, Alessandro

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Problem with SETUPTEX and KSH93
by Alessandro Perucchi 20 Aug '12

20 Aug '12

Hello, I'm new to ConTeXt, and I find it great! I've done the standalone installation on my Linux box. For many reasons, I don't use bash, but ksh since all my customers are using ksh as there shell. Nevertheless, the setuptex is not working for me. Of course it works if I say . ~/context/tex/setuptex ~/context/tex But I would like to have it in the short form: . ~/context/tex/setuptex So for that in ksh, I needed to correct the setuptex like that: line 99: if [ z"$BASH_SOURCE" != z ]; then SCRIPTPATH="$BASH_SOURCE" else if [ z"${.sh.version}" != z ]; then SCRIPTPATH="${.sh.file}" else SCRIPTPATH="$0" fi fi And now, it works for ksh93, and all the other shells should be unaffected. Would it be possible to correct it? Or if someone has a better idea, then I'm also ok, as long as it works for ksh. Sincerely yours, Alessandro Perucchi

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EuroTeX 2012 / 6th ConTeXt Meeting reminder
by Taco Hoekwater 20 Aug '12

20 Aug '12

Hi all, Invitation ========== This is a reminder that EuroTeX 2012, the sixth ConTeXt meeting, the NTG najaarsbijeenkomst, and Dante's Herbsttagung will all be held together at the same time and place in Breskens, the Netherlands, on October 8 - October 12 The organisation of the conference is a joint effort of the NTG, Dante and the ConTeXt Group. Theme ===== Breskens is a small beach town that lives mostly off tourism, and people on vacation tend to do slightly odd, relaxing things that they do not normally have time for. Combining these two, the motto of this conference is: Recreational uses of TeX We already have quite some interesting talks, but we are still accepting new proposals. Registering =========== Please note that registration will be possible until SEPTEMBER 10, and that there can be no late registrations for this conference. So if you wish to attend, you have only three weeks left to fill in your registration! See http://www.ntg.nl/eurotex2012/ for additional details, including abstracts and the registration form. The programme promises to be quite interesting, so we hope to see you there! On behalf of the organising committee, Taco Hoekwater PS Please forward this message to whoever seems appropriate to you.

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