November 2019 - ntg-context - NTG Mailing Lists

eqalign
by nohop＠posteo.org 22 Nov '19

22 Nov '19

Dear All, The command \eqalign does not work as described under: https://wiki.contextgarden.net/Math_with_newmat as the ampersands are typeset (and the equal signs unaligned). The following minimal example shows the issue: ------------- \usemodule[newmat] \starttext \startformula \eqalign{ A & = x\cr & = y\cr} \stopformula \stoptext ------------- (Issue showing up in context 2019.11.14 17:07.) Best regards.

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LuaTeX incompatible with Lua
by Henri Menke 21 Nov '19

21 Nov '19

Dear list, The following Lua script behaves differently when executed in Lua vs. LuaTeX. print(os.execute("date")) It seems that the definition of os_execute in loslibext.c was copied over from Lua 5.1 and not adapted to newer versions. $ lua5.1 test.lua 0 $ lua5.2 test.lua true exit 0 $ lua5.3 test.lua true exit 0 $ texlua test.lua 0 $ luajit test.lua 0 $ texluajit test.lua 0 As you can see from the example, this comes with the additional complication that LuaJIT has Lua 5.1 behaviour and should also retain that. Cheers, Henri

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ConTeXt as a service
by Brian Ballsun-Stanton 20 Nov '19

20 Nov '19

In reply to: https://mailman.ntg.nl/pipermail/ntg-context/2019/096313.html I personally run ConTeXt as a service (as a sort of do-it-yourself Overleaf). I use floobits (https://floobits.com/Denubis) as an intermediary code server, and their floomatic sevice(https://floobits.com/help/floomatic) running on a server I have. That then calls a shell script that invokes ConTeXt, which writes logs and pdfs to an nginx monitored folder. It's been running for about 4 years now and has been solid enough for me to use without thinking too much about. Happy to share code and details. My deployment is super-hacky, but it works? -Brian

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setup according to total numbers
by Pablo Rodriguez 20 Nov '19

20 Nov '19

Hi Hans, this is related to a previous message (https://mailman.ntg.nl/pipermail/ntg-context/2019/096253.html) I don’t know how hard could to implement them, but it would be useful to be able to setup xtables and lists based on the total number of columns, rows and items. Some cases would be: - Set a different width in list if their total number of items is more than 9 and another one if items are more than 19. - List iwith alphabetic numbering when it contains fewer items than 5 and with digits in other case. - Stretch xtable to width, if it contains more than 4 columns. - Stretch xtable to height, if it contains more than 10 rows. Sure, there may be plenty of other cases in which being able to setup xtables and list based on the total number of their elements would be handy. I wonder whether it would be possible to have commands that provide the number of these elements to be used to set them up. Many thanks for your help, Pablo -- http://www.ousia.tk

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two issues with inmargin attachments
by Pablo Rodriguez 20 Nov '19

20 Nov '19

Hi Hans, I have the following sample, using latest beta from 2019.11.14 17:07: \setuppapersize[A5] \showframe \setupinteraction[state=start] \setupinteractionscreen[option=attachment] \starttext a\attachment[file=xml-mkiv.pdf] b\attachment[file=mkiv-publications.pdf] c\attachment[file=onandon.pdf, location=inmargin] d\attachment[file=notnow.pdf, location=inmargin] e\attachment[file=about.pdf, location=text] f\attachment[file=i-context.pdf, location=text] \stoptext The default location seems to be "text", but when specified as option it prevents the attachment. The general configuration for location may be different, but in that case it seems impossible to use "text" for a single attachment. "location=inmargin" seems to place all /FileAttachment annotations on the same place (when from the same line, they have the same /Rect), as shown in the excerpt: 21 0 obj << /Type /Annot /NM (attachment:3) /Subtype /FileAttachment /Rect [ 35.54572 493.13349 41.52002 499.1078 ] >> endobj 22 0 obj << /Type /Annot /NM (attachment:4) /Subtype /FileAttachment /Rect [ 35.54572 493.13349 41.52002 499.1078 ] >> endobj Would it be possible that inmargin attachments allow more than one from the same line? Many thanks for your help, Pablo -- http://www.ousia.tk

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Exchangeing content of variables between luacode and context
by Rudolf Bahr 20 Nov '19

20 Nov '19

Hello All! To send variable contents from context to luacode I can put them into the function invocation or use 'tokens.getters.macro("TestA")', an interesting and very nice possibility to let luacode itself getting contents of context macros. The (only?) way back, from luacode to context, could be done by 'tokens.setters.macro("TestA","a")' [1] . Now, to store Luacode's variable contents permanently in context programs I could Luacode let copy my ConTeXt program to another place on disk with a newly defined macro inside. But, does somebody know (by chance) of another, more elegant possibility? I think giving back a value by "return" won't work. Best wishes, Rudolf [1] Hans Hagen, "ConTeXt Lua Documents", January 12, 2018, 7.4, page 63

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[updating LMTX]
by Floris van Manen 20 Nov '19

20 Nov '19

when updating lmtx using the install.sh script, it seems to be unable to find among others, the web2c . It looks everywhere, except the location where it was put by that script in the first place. /home/vm/data/context/tex/texmf/web2c the $PATH contains /home/vm/data/context/tex/texmf-linux-64/bin I have no clue as how to interpret the log. Should i define $TEXMF ? .F ... mtxrun | forcing cache reload resolvers | resolving | looking for regular 'texmfcnf.lua' on given path '/home/vm/texmf/web2c' from specification 'home:texmf/web2c' resolvers | resolving | looking for regular 'texmfcnf.lua' on given path '/home/vm/data/texmf-local/web2c' from specification 'selfautoparent:/texmf-local/web2c' resolvers | resolving | looking for regular 'texmfcnf.lua' on given path '/home/vm/data/texmf-context/web2c' from specification 'selfautoparent:/texmf-context/web2c' resolvers | resolving | looking for regular 'texmfcnf.lua' on given path '/home/vm/data/texmf-dist/web2c' from specification 'selfautoparent:/texmf-dist/web2c' resolvers | resolving | looking for regular 'texmfcnf.lua' on given path '/home/vm/data/texmf/web2c' from specification 'selfautoparent:/texmf/web2c' resolvers | resolving | looking for fallback 'contextcnf.lua' on given path '/home/vm/texmf/web2c' from specification 'home:texmf/web2c' resolvers | resolving | looking for fallback 'contextcnf.lua' on given path '/home/vm/data/texmf-local/web2c' from specification 'selfautoparent:/texmf-local/web2c' resolvers | resolving | looking for fallback 'contextcnf.lua' on given path '/home/vm/data/texmf-context/web2c' from specification 'selfautoparent:/texmf-context/web2c' resolvers | resolving | looking for fallback 'contextcnf.lua' on given path '/home/vm/data/texmf-dist/web2c' from specification 'selfautoparent:/texmf-dist/web2c' resolvers | resolving | looking for fallback 'contextcnf.lua' on given path '/home/vm/data/texmf/web2c' from specification 'selfautoparent:/texmf/web2c' resolvers | resolving | resolvers | resolving | warning: no lua configuration files found resolvers | resolving | no texmf paths are defined (using TEXMF) ... mtxrun | unknown script 'cache.lua' or 'mtx-cache.lua' ...

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ConTeXt: specify a path to font in \definefontfamily
by Krešimir Cindrić 20 Nov '19

20 Nov '19

I'm *very* new to ConTeXt, so please excuse the newbie question. I'm trying to load a font from a file. The .otf files are stored in a directory named fonts/ which is in the directory of the .tex file I'm trying to compile. This code does not work, and reverts to the default font: \definefontfamily [mainface][serif] [My Font] [tf=file:./fonts/MyFont.otf, it=file:./fonts/MyFont-It.otf, bf=file:./fonts/MyFont-Bd.otf, bi=file:./fonts/MyFont-BdIt.otf] \setupbodyfont[mainface] \starttext\title{Hello, world!} Hello World! \emph{Hi!} \stoptext However, if I copy the .otf files into the same directory as the .tex file, and write tf=file:MyFont.otf etc, then everything works fine. How do I specify a relative path to the font, inside the .tex file? In LaTeX, I would use fontspec package and do the following: \setmainfont {MyFont.otf} [Path =./fonts/, ItalicFont = MyFont-It.otf] However, I couldn't find the equivalent syntax for \definefontfamily in ConTeXt. Just to mention, I am using ConTeXt version: 2019.03.21 21:39 as part of TeX Live, on Manjaro Linux. Regards, Krešimir

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context command line interface documentation?
by Philipp A. 20 Nov '19

20 Nov '19

Hi, I want context to shut up, specifically the “mkiv lua stats” at the end are useless to me and make me scroll up for actual error messages, but better would be to just stop after the first error. I consulted the --help docs but found them entirely unhelpful. Also there’s no examples. As doing it wrong results in no error message or indeed any kind of effect, I was in the dark. First I consulted the --help and found: “--silent=list disable logcatgories (show list with --showlogcategories)”. What’s a “list”? comma separated? Do I need string delimiters? Whatever, executing “context --showlogcategories” tells me the log category “mkiv lua stats” exists, so: “context --silent='mkiv lua stats' doc.tex” does … nothing, the lua stats are still there mocking me. OK, let’s do what you do when there’s no documentation; dive in the code: “grep -C3 'batchmode' /usr/share/texmf-dist/scripts/context/lua/mtx-context.lua” This tells me that there’s a “errorstopmode” in luatex but no way to make the context script invoke “luatex -interaction=errorstopmode”, great. Diving deeper, “setblocked” in mtxtun.lua checks if --silent=all is specified, nice! But that affects everything EXCEPT for the “mkiv lua stats”. Therefore the two most useful ways to run context (--errorstopmode and --silent='mkiv lua stats') seem impossible unless one writes a wrapper script. Would be cool to have this fixed. And to have actually useful documentation instead of having to deep-dive into mtxrun.lua. Best, Philipp PS: I filed http://tracker.luatex.org/view.php?id=1014 and http://tracker.luatex.org/view.php?id=1015

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[Widgets] Any good examples for developing JS-enabled PDFs that calculate?
by Paul Mazaitis 19 Nov '19

19 Nov '19

Hi everyone, My goal is to have a PDF that - allows users to input numeric information in various fields, - makes calculations on the data in those fields, - ...and reports that information somewhere in the PDF. It seems that the widget support could handle this, but I'm struggling to understand how the pieces go together; does anyone have an example of this use case I could puzzle over? Many thanks! -Paul

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