January 2021 - ntg-context - NTG Mailing Lists

"Nicefracs" hidden in math-frc.mkiv
by Andres Conrado Montoya 18 Jan '21

18 Jan '21

Hello, list. I Was checking out math-frc.mkiv to learn stuff, and found out that at the end of that file, from line 673, there is a couple commented out macros to generate "nice fractions'', i.e.: ½ (as in the LaTeX package nicefrac). Why has this code been commented out? These are quite useful. -- Andrés Conrado Montoya Andi Kú andresconrado(a)gmail.com http://sesentaycuatro.com http://messier87.com http://chiquitico.org ---------------------------------------- Los fines no justifican los medios, porque la medida verdadera de nuestro carácter está dada por los medios que estamos dispuestos a utilizar, no por los fines que proclamamos. ---------------------------------------- “You develop an instant global consciousness, a people orientation, an intense dissatisfaction with the state of the world, and a compulsion to do something about it. From out there on the moon, international politics look so petty. You want to grab a politician by the scruff of the neck and drag him a quarter of a million miles out and say, ‘Look at that, you son of a bitch.’” — Apollo 14 astronaut Edgar Mitchell

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Getting dimensions in Lua
by Jairo A. del Rio 18 Jan '21

18 Jan '21

Hi, list. I want to get some dimensions in Lua. See, for instance \starttext \the\dimexpr\availablehsize\relax %say, 426pt \stoptext Is there an equivalent in ConTeXt for Lua, i.e. without passing values from TeX or, at least, using only Lua commands? Thank you in advance. Best wishes, Jairo

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question about vardef variables
by Damien Thiriet 18 Jan '21

18 Jan '21

Hi, I have some troubles with understanding metafun's macro mechanism. Given this MWE: \starttext \startMPpage vardef Test (expr ab,cd)= %numeric ab; %numeric cd; draw unitsquare scaled 10 xshifted ab; draw unitsquare scaled 10 yshifted cd; enddef; Test (50,100); \stopMPpage \stoptext Uncommenting the two declarations makes me run intro a silent error. I was lucky enough yesterday to get an explicit error message with a more complex macro. It made me figure out where my problems came from. So here are my two questions: - Why shouldn't we tell metafun if expr is a path, a pair or so on? - Would it be possible to issue an error message each time this wrong declaration is made? Thanks, Damien Thiriet

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expansion of xml userdata
by Jano Kula 17 Jan '21

17 Jan '21

Hello to everybody! \setuphead[section][expansion=yes] expands xml reference to the actual content in TUC file: \xmlatt {xml:name::4}{title} → First section for titles & bookmarks. The same is not true for userdata (mkiv & mkxl). Do you know how to force expansion of userdata? MWE attached. Thank you, Jano \startbuffer[doc] <?xml version "1.0"?> <document> <section title="First section"> text </section> <section title="Second section"> text </section> </document> \stopbuffer \setuphead[section][expansion=yes] \setuplist[section][alternative=command, command=\SectionListCommand] \define[3]\SectionListCommand{% {\bf#1\par title: #2\par usertitle: \structurelistuservariable{usertitle}}\par \blank \endgraf} \startxmlsetups xml:name \xmlsetsetup{\xmldocument}{document|section}{xml:name:*} \stopxmlsetups \xmlregistersetup{xml:name} \startxmlsetups xml:name:document \xmlflush{#1} \stopxmlsetups \startxmlsetups xml:name:section \startsection[title=\xmlatt{#1}{title}] [usertitle=\xmlatt{#1}{title}] \stopsection \stopxmlsetups \starttext \placelist[section] \xmlprocessbuffer{xml:name}{doc}{} \stoptext

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Re: [NTG-context] question about vardef variables
by Jeong Dal 17 Jan '21

17 Jan '21

Dear Damien Thiriet, If you change ‘vardef’ to ‘def’, you will get the figure. There is a difference between ‘vardef’ and ‘def’. AFAIK, vardef returns the value of the last statement in the macro. Please see the examples in Metafun manual from page 32 ~ . I hope that you find your answer there. I am sorry that I am not good enough to explain the variables. Best regards, Dalyoung > 2021. 1. 17. 오후 8:00, ntg-context-request(a)ntg.nl 작성: > > \starttext > \startMPpage > > vardef Test (expr ab,cd)= > %numeric ab; > %numeric cd; > draw unitsquare scaled 10 xshifted ab; > draw unitsquare scaled 10 yshifted cd; > enddef; > > Test (50,100); > \stopMPpage > \stoptext

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Hatch a cell : meta:hash:left
by Fabrice Couvreur 16 Jan '21

16 Jan '21

Hi, I seem to have seen a method for hatching the cell of a table, but maybe it's my imagination. The following code does not work. Thanks for your help. Fabrice ################## hatching.tex ############# \setupcolors[state=start] \usemodule[xwi] \starttext \startxtable [align={lohi,middle}, width=1.5cm,framecolor=purple] \startxrow \startxcell[background=color,backgroundcolor=paleturquoise] i \stopxcell \startxcell [background=meta:hash:left, meta:hash:linecolor=green] \stopxcell \startxcell 0 \stopxcell \startxcell 1 \stopxcell \startxcell 2 \stopxcell \stopxrow \stopxtable \stoptext ########################################

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Floating object in text - Spacing
by Johann Birnick 16 Jan '21

16 Jan '21

Consider the following example: \setupexternalfigures[location=default] \starttext \placefigure[right,none]{}{\externalfigure[hacker.jpg][scale=518]} \samplefile{lorem} \stoptex What bothers me is the top spacing. There is space to the top, and I dont want it to be there. On the bottom there is no spacing. I would expect it to be evenly distributed. But the spacing on the top will always be there. How to remove this? Thank you, Johann

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\setupcolors and \underbar bug?
by Alan Bowen 14 Jan '21

14 Jan '21

The mwe \starttext \setupcolors[state=stop] {\darkred Test} \underbar{Here} \stoptext fails: “Here” does not appear above the underbar (which has the correct length). When \setupcolors[state=stop] is commented out, the file runs as it should. Alan

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what’s up with \setupdelimitedtext[method=font]?
by Henning Hraban Ramm 14 Jan '21

14 Jan '21

Hi again, the following example used to work with LMTX (but not MkIV) from September. Now I get the "narrower" indentation only if I comment the first line (in both versions) – apparently there’s a setup conflict, and I don’t know any more why I needed this setup. Could you explain what it does (did, should do)? Hraban \setupdelimitedtext[quotation][method=font] % hanging quotation marks %\setupalign[hanging] \setupnarrower[left=2em,right=1.5em] \definenarrower[Zitat] \setupnarrower[Zitat] [left=2em, right=1.5em, before=\dontleavehmode\hskip-0.33em\startquotation, % fake hanging quotation mark after=\stopquotation] \usemodule[visual] \starttext \fakewords{50}{50} \startquotation quotation \fakewords{100}{100} \stopquotation\footnote{about quotation} \startZitat Zitat \fakewords{100}{100} \stopZitat\footnote{about Zitat} \stoptext

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LMTX problem with \input
by Henning Hraban Ramm 14 Jan '21

14 Jan '21

Another LMTX/MkIV difference: In a component, I include another file with \input, that starts with \page in the first line. With LMTX I get an error: """ I can't figure out why you would want to use a tab mark here. If some right brace up above has ended a previous alignment prematurely, you're probably due for more error messages. """ It works if I insert a blank line, and it works in MkIV. Sorry, I can’t reproduce this apparent edge case in a MWE yet. Hraban

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