ntg-context June 2020

ntg-context@ntg.nl

52 participants
100 discussions

pagecolumns: get the current column
by mf 26 Jun '20

26 Jun '20

Hello list, I'm using a 2-columns layout and I'd like to put some information in the margin. I should put that information in the left margin when I'm in the left column, and in the right margin when I'm in the right column, to prevent the extra information overlapping the main text in the other column. I found a useful counter in page-pcl.mkiv: \c_page_col_current. Here's a MWE: \unprotect \def\curCol{\c_page_col_current} \protect \def\InfoInMargin#1{\doifelse{\the\curCol}{1}{\inmargin{#1}}{\inothermargin{#1}}} \def\TestText{\InfoInMargin{\bf \the\curCol}\input ward \InfoInMargin{\bf \the\curCol} \input ward} \starttext \startpagecolumns[n=2,distance=25mm] \dorecurse{5}{\TestText\par} \stoppagecolumns \stoptext \c_page_col_current works most of the time, but unfortunately it tells you the current column before the lines of a paragraph get distributed over columns. So sometimes it fails. You can see that in the MWE: the bold "1" between columns in the upper part of the page. It should be a bold "2" in the right margin. Is there a better way to read the current column? Thanks, Massi

2 1

error running wiki example with labels
by Jan-Erik Hägglöf 26 Jun '20

26 Jun '20

Hello All! In the page https://wiki.contextgarden.net/Labels <https://wiki.contextgarden.net/Labels> I’ve tried with no success to run those examples given at the page. The error complaint as the log shows below return { ["filename"]="./labels3.tex", ["lastluaerror"]="function call [801]: ...-64/tex/texmf-context/tex/context/base/mkiv/node-syn.lua:435: attempt to index a nil value (upvalue 'filehandle')", ["lasttexerror"]="?", ["linenumber"]=70, ["luaerrorline"]="435", ["offset"]=10, } open source > level 1, order 1, name 'cont-yes.mkiv' system > system > ConTeXt ver: 2020.03.10 14:52 MKIV beta fmt: 2020.4.13 int: english/english system > system > 'cont-new.mkiv' loaded open source > level 2, order 2, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/cont-new.mkiv' system > beware: some patches loaded from cont-new.mkiv close source > level 2, order 2, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/cont-new.mkiv' system > files > jobname 'labels3', input './labels3', result 'labels3' fonts > latin modern fonts are not preloaded languages > language 'en' is active system > synctex functionality is enabled, expect 5-10 pct runtime overhead! open source > level 2, order 3, name './labels3.tex' open source > level 3, order 4, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/fonts/mkiv/type-imp-plex.mkiv' open source > level 4, order 5, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/fonts/mkiv/type-imp-texgyre.mkiv' close source > level 4, order 5, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/fonts/mkiv/type-imp-texgyre.mkiv' close source > level 3, order 5, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/fonts/mkiv/type-imp-plex.mkiv' fonts > defining > font with asked name 'IBMPlexSans-regular' is not found using lookup 'file' fonts > defining > unknown font 'IBMPlexSans-regular', loading aborted fonts > defining > unable to define 'IBMPlexSans-regular' as 'ibmplex-11pt-ss-tf-0--0' open source > level 3, order 6, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/meta-imp-dum.mkiv' close source > level 3, order 6, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/meta-imp-dum.mkiv' metapost > library 'dum' is loaded metapost > initializing instance 'metafun:1' using format 'metafun' and method 'default' metapost > loading 'metafun' as '/Users/janneman/context-osx-64/tex/texmf-context/metapost/context/base/mpiv/metafun.mpxl' using method 'default' metapost > initializing number mode 'scaled' metapost log > metapost log > loading metafun, including plain.mp version 1.004 for metafun iv and xl metapost log > fonts > bodyfont '14pt' is defined (can better be done global) fonts > bodyfont '16.8pt' is defined (can better be done global) fonts > bodyfont '11.2pt' is defined (can better be done global) fonts > defining > font with asked name 'IBMPlexSans-regular' is not found using lookup 'file' fonts > defining > unknown font 'IBMPlexSans-regular', loading aborted fonts > defining > unable to define 'IBMPlexSans-regular' as 'ibmplex-14pt-ss-tf-0--0' lua error > lua error on line 70 in file ./labels3.tex: function call [801]: ...-64/tex/texmf-context/tex/context/base/mkiv/node-syn.lua:435: attempt to index a nil value (upvalue 'filehandle') 60 \setlayer[BG][ 61 preset=leftbottom, 62 hoffset=5mm, 63 voffset=3mm]{% 64 the context group} 65 66 \starttext 67 \startlines 68 \Name{Hans Hägar} 69 \Title{CEO · R&D} 70 >> \page 71 72 \Name{Wolf Schmidt} 73 \Title{0th Level Support} 74 \page 75 76 \Name{Mocca Bob} 77 \Title{the Builder} 78 \page 79 80 \Name{A. Rockefeller} It seems to complain with the \page command Jan-Eriks-Air: ~/Google Drive/PRIVAT janneman > context --version mtx-context | ConTeXt Process Management 1.03 mtx-context | mtx-context | main context file: /Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/context.mkiv mtx-context | current version: 2019.07.24 11:31 mtx-context | main context file: /Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/context.mkxl mtx-context | current version: 2020.03.10 14:52

5 9

Which lua XML library is embedded in LMTX?
by Gerben Wierda 26 Jun '20

26 Jun '20

According to the XML manual: << 2.1 >> TEX versus LUA It will not come as a surprise that we can access xml files from TEX as well as from Lua. In fact there are two methods to deal with xml in Lua. First there are the low level xml functions in the xml namespace. On top of those functions there is a set of functions in the lxml namespace that deals with xml in a more TEXie way. << 3.7 >> manipulation You can use Lua code to manipulate the tree and it makes no sense to duplicate this in TEX. In the future we might provide an interface to some of this functionality. Keep in mind that manipuating the tree might have side effects as we maintain several indices into the tree that also needs to be updated then. Having read that, I was loooking for the documentation of the commands that are available in the xml namespace. I want to manipulate a XML tree in LMTX lua. But looking online gives me all kinds of different XML-solutions that are proposed for lua. Which one is embedded in LMTX and available in the xml namespace? But then I get confused because other elements like xml.first, xml.collected are in the xml namespavce and mentioned. So, maybe I misunderstand things and is the documentation in << 5.5 >> selectors and injectors This section describes a bit special feature, one that we needed for a project where we could not touch the original content but could add specific sections for our own purpose. Hopefully the example demonstrates its useability. But that part I do not understand. What I need (in LMTX lua) to add (sub)nodes to the XML node (that I read with xml.first()) because the data I get is broken and I need to fix it before I can use it (and I cannot get good data) The easiest way is to add the correct data to the XML and then use it in my code. If I cannot do that I need to write parallel code that largely does the same as what I already have (ugh).. G

2 1

Macros which scan subscripts/superscripts in ConTeXt
by Jairo A. del Rio 26 Jun '20

26 Jun '20

Hi, list! I've seen the following in Stack Exchange: https://tex.stackexchange.com/questions/503208/define-macro-that-scans-ahea… The answer is: \documentclass{article}\usepackage{amsmath}\usepackage{xparse} \NewDocumentCommand{\mymathsym}{e{^_}}{% x^{\mathrm{foo}\IfValueT{#1}{,#1}}_{\mathrm{bar}\IfValueT{#2}{,#2}}%} \begin{document} \begin{gather}\mymathsym \\\mymathsym^{\mathrm{extrasup}} \\\mymathsym_{\mathrm{extrasub}} \\\mymathsym^{\mathrm{extrasup}}_{\mathrm{extrasub}} \\\mymathsym_{\mathrm{extrasub}}^{\mathrm{extrasup}} \end{gather} \end{document} Such a macro contextually defines a behavior for a subscript and a superscript even if they aren't displayed in a specific order, so \mymacro_{a}^{b} \mymacro^{b}_{a} have the same output, even if the intended behavior is not the typical one (I could redefine it so subscripts change colors, for instance). Although I could just port the macro using xparse-generic because it works in ConTeXt too, how to define a macro like that the ConTeXt way, i.e., using only ConTeXt macros? Thank you in advance. Jairo :)

3 2

French interface - previous message = wrong title
by Garulfo 25 Jun '20

25 Jun '20

Hi, I try to update and to fill the french content of mult-def.lua. Currently, I have an updated "mult-def.lua" file. 3 questions : 1/ which commands should be executed in order to make the new local interface effective with context 2/ which commands should be executed in order to build a local version of setup-fr.pdf 3/ many commands in setup-fr.pdf are not documented in mult-def.lua where does the additionnal translations should come from ? Thanks a lot for your precious help.

3 3

update
by Hans Hagen 25 Jun '20

25 Jun '20

Hi, I uploaded a new version (both mkiv and lmtx). We removed some low level no longer used code (older engines), normalized some in the process, fixed a few things, etc. === lmtx only === While updating the cld manual I decided to also add an other table mechanism (in addition to the one already reported in an earlier mail). I have no clue how useful it is, but as usual with tex, users find ways to (ab)use it. This one behaves a bit more like registers. A hashed one is defined as: \newhashedtable\somehashtable \somehashtable{ foo = 123, bar = "foo" } [123 = \the\somehashtable{foo}] [123 = \the\somehashtable foo ] [foo = \the\somehashtable{bar}] [foo = \the\somehashtable bar ] \bgroup \somehashtable{ foo = 456, bar = "oof" } [456 = \the\somehashtable{foo}] [oof = \the\somehashtable{bar}] \egroup [123 = \the\somehashtable{foo}] [foo = \the\somehashtable{bar}] \bgroup \global\somehashtable{ foo = 456 } \somehashtable{ bar = "oof" } [456 = \the\somehashtable{foo}] [oof = \the\somehashtable{bar}] \egroup [456 = \the\somehashtable{foo}] [foo = \the\somehashtable{bar}] or an indexed one: \newindexedtable\someindextable \someindextable{ 123, "foo" } [123 = \the\someindextable 1] [123 = \the\someindextable \numexpr 2 - 1\relax] [foo = \the\someindextable 2] [foo = \the\someindextable \numexpr 1 + 1\relax] \bgroup \someindextable{ 456, "oof" } [456 = \the\someindextable 1] [oof = \the\someindextable 2] \egroup [123 = \the\someindextable 1] [foo = \the\someindextable 2] \bgroup \global\someindextable{ [1] = 456 } \someindextable{ [2] = "oof" } [456 = \the\someindextable 1] [oof = \the\someindextable 2] \egroup [456 = \the\someindextable 1] [foo = \the\someindextable 2] In both cases, local and global assignments are supported. At the Lua end you can access these tables too: context.hashedtables.somehashtable.bar context.indexedtables.someindextable[2] There is some overhead involved but performance and memory usage is quiite okay. Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

1 0

.jpeg not recognised in LMTX
by Sytse Knypstra 25 Jun '20

25 Jun '20

Today I discovered that my LMTX version (2020.06.20) does not render an \externalfigure with .jpeg extension. After renaming to .jpg the picture is correctly shown. I would suggest to add the .jpeg extension to the list of allowed graphic types in LMTX. With greetings, Sytse Knypstra

2 1

latest silly question - insert unicode character?
by Mike Cooper 25 Jun '20

25 Jun '20

Hi. Me again. How does one insert/use a special character? At this particular time, I want Double Prime: Unicode 02BA. How?? THANKS! Mike Cooper Technical Trainer Murchison Drilling Schools, Inc. 2501 Juan Tabo NE Albuquerque, NM 87112 Tel: (505) 293-6271 Fax: (505) 298-5294 Email: mike(a)murchisondrillingschools.com<mailto:mike@murchisondrillingschools.com> Website: www.murchisondrillingschools.com<http://www.murchisondrillingschools.com/> [cid:image007.jpg@01D03ADC.BD6E6850]<https://www.facebook.com/pages/Murchison-Drilling-Schools/158018484232622> [cid:image008.jpg@01D03ADC.BD6E6850] <http://www.linkedin.com/company/murchison-drilling-schools-inc-> [cid:image009.jpg@01D03ADC.BD6E6850] <https://twitter.com/trainingmds> Murchison Drilling Schools is now part of [cid:image001.png@01D63515.857FD120]

2 1

Checking for singlesided/doublesided at run-time
by Lukas/ConTeXt 24 Jun '20

24 Jun '20

Hello, is there a way to detect whether the document is intended as single- or double- sided, IOW, whether \setuppagenumbering[alternative=singlesided] or \setuppagenumbering[alternative=doublesided] has been specified? If so, is it possible by Lua, too? Regards, Lukas

5 6

explain please
by Hans van der Meer 24 Jun '20

24 Jun '20

How can the crash in the minimal example here be explained? And is there a solution to avoid this and make the crash going away "without having to jump through special hoops"? dr. Hans van der Meer

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ntg-context June 2020