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lmtx update: two experimental features
by Hans Hagen 18 Apr '21

18 Apr '21

Hi, I uploaded a new version. There are two new features that are experimental. This time we attempt to deal with the more tricky things and artifacts of the otherwise nice tex machinery we need to get rid of. One can rightfully argue that they are not really issues as one can work around them (and so they are never brought to attention) but why not make things better (cleaner) if we can. (1) Languages: hyphenation normally uses a hyphen and the engine has some messy work-around-border-cases in the hyphenator. So, I wondered if we could improve that. First of all, there can now be more than one hyphen character so here is the way to deal with it (the hyphenchar code is like the other 'codes'): \hccode"002D = "002D \hccode"2010 = "2010 \hccode"2013 = "2013 \hccode"2014 = "2014 This makes all these four into (kind of) compound word seperators: \startTEXpage \hsize3mm firstpart\char"002D secondpart\blank firstpart\char"2010 secondpart\blank firstpart\char"2013 secondpart\blank firstpart\char"2014 secondpart \stopTEXpage will work ok. There are provisions for those characters being at the left and right edges. All is under low level (engine) option controls (compatibility and such) but currently I enable all. With a bit of definitions one can for the 002D and 2010 cases deal with pre/post variants .. the question is do we need that for more, if so, then I need to add some more code (doable). This feature relates to Denis collection of German compound words and ligature prevention data. Dutch has the same issue. (Denis: we can ditch the compound word entries now, the ones with -.) Also, this kind of automatism (keep in mind that normally tex won't hyphenate the first word in such a compound) is especially handy in cases where there is no control over the input as with xml (when we do have control you can use || as compound word marker). (I'm wondering if we should deal with the typical somewhat archaic tex -- and --- in a different manner, but I'll come back to that.) (2) Math: what is added is not so much an issue in traditional tex math usage which is for journals but as context is used for educational purposes and thereby has quite some tricks built in. Some of these jump through ugly hoops to get it done. Here I stick to color as example. Just try this (notice the spacing): \startTEXpage[offset=10pt] \showmakeup[mathglue]% \enableexperiments[simplegroups]% $ a = b \color[red]{=} c \startcolor[blue]=\stopcolor d $\par $ \sin \color[green]{(x)} = \sin {(x)} $\par \disableexperiments[simplegroups]% $ a = b \color[red]{=} c \startcolor[blue]=\stopcolor d $\par $ \sin \color[green]{(x)} = \sin {(x)}$\par \stopTEXpage The 'simplegroups' experiment enables a more hybrid grouping model but we (read: Wolfgang, Aditya and I, but input is welcome) need to check for side effects carefully. The 'mathglue' tracker is also new, and it exposes what actually goes on. It has to do with the fact that something grouped with { } creates a math list which enforces different spacing but in the case of color that is a side effect we don't want (of course it relates to how context implements the \color macro and one could work around it, but the problem is of a more general nature. 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 -----------------------------------------------------------------

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Sorting items in Lua
by Jairo A. del Rio 18 Apr '21

18 Apr '21

Hi, list. I want to know how to use ConTeXt sorters, as those used in registers, in Lua. Like this: \starttext \startluacode --Spanish local list = {"ñandú", "perrera", "zócalo", "árnica"} --What's "sortingfunction"? context(table.concat(sortingfunction(list)," ")) \stopluacode \stoptext Also, as registers allow to set a language for sorting, I want to know how to do the same through Lua, e.g., sorting the same list according to English and then Spanish rules. I've searched for examples in the archive, but I've only found cases working on the TeX side. Thank you in advance. Jairo

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\externalfigure for only one page of a multiple page pdf
by a.rosenstock＠web.de 18 Apr '21

18 Apr '21

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No space between \cite and next word.
by Mikael Sundqvist 18 Apr '21

18 Apr '21

Hi, I think there has been some change recently. Is it on purpose that there is no space after the \cite. Look how the parenthesis that ends the citation and the word "text" are set without space inbetween. /Mikael \startbuffer[mybib] @article{a, author = {An Author}, title = {A title}, year = {2021}, } \stopbuffer \usebtxdefinitions [apa] \usebtxdataset [mybib.buffer] \starttext Text \cite[a] text. \placelistofpublications \stoptext

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Macro to write a letter with \ mathscript{}
by Fabrice Couvreur 18 Apr '21

18 Apr '21

Hi, This is going to be difficult to explain because the code below works but in a project with many components does not. Actually the macro does not work in the definition environment in my project but in the same environment of this simple code yes. Thank you for your possible help. Fabrice \setupbodyfont[modern] \setupenumerations [before={}, after={\blank}, alternative=serried, number=no, title=yes, titleleft={(}, titleright={)}, prefix=yes, prefixsegments=chapter, way=bychapter, titlestyle=bold, width=broad] \defineenumeration [definition] [text=Définition, number=no, headcommand=\groupedcommand{}{}, style=slanted] \setupmathematics[stylealternative=calligraphic] \unexpanded\def\CScript#1#2{\start\switchtobodyfont[stixtwo]\m{{\mathscript{#1}}_{#2}}\stop} \unexpanded\def\cscript#1{\start\switchtobodyfont[stixtwo]\m{{\mathscript{#1}}}\stop} \starttext \startdefinition \placefigure[right]{}{ \startMPcode path rectangle; rectangle=unitsquare xscaled 6cm yscaled 4cm; draw rectangle withcolor green; label.bot("\cscript{C}", center rectangle); \stopMPcode} Soit \m{f} une fonction continue et positive sur un intervalle \m{[a\,;b]} et \cscript{C} sa courbe représentative dans un repère orthogonal. L'aire du domaine délimité par la courbe \cscript{C}, l'axe des abscisses et les droites d'équations \m{x=a} et \m{x=b}, exprimée en unité d'aire, est appelée {\bi intégrale de \m{a} à \m{b} de la fonction \m{f}}. \stopdefinition \stoptext

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Verbose numbers in swedish
by peter kvillegard 17 Apr '21

17 Apr '21

Hi, I'm trying to get verbose numbers (i.e. "five" instead of 5) to work when \mainlanguage[sv] is set. I'm new to ConTeXt so I'm still struggling to grasp how everything fits together, but I found the spanish verbose numbers in core-con.lua, and added functions for swedish to match that which seemed relevant. I'm attaching my core-con.lua if that helps. (My additions start at line 1418) My question is, are there more places in other files that also need to be modified for this to work? If so, I would be grateful if you could point me in the right direction. There must be some step that I'm missing. Thank you. MWE where I expect the word "ett" instead of "1": \mainlanguage[sv] \starttext \convertnumber{words}{1} \stoptext

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register for biblical citations
by jbf 17 Apr '21

17 Apr '21

I am wondering if anyone has had to set up a register (index) for biblical citations, where the order is not alphabetical but the order of the biblical books themselves, so, for example, citations from Genesis (e.g. Gen 1:1; Gen 6:4; Ex 15:2; Deut 12:8 etc. etc). I am not at all sure how to achieve this. Julian

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autopdf on MacOS?
by Hans van der Meer 16 Apr '21

16 Apr '21

When running the command: context --autopdf --run myfile.tex I had hoped the pdfviewer Preview on my MacOS system (version Catalina) would open the pdf for viewing. Allthough a new pdf is created, this is not opened. If the pdf is open in Preview already, it is not updated unless switching to the Preview application. It something wrong here? Is it not functional in MacOS? Am I missing some clue? met vriendelijke groet dr. Hans van der Meer

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lmtx goodies
by Hans Hagen 15 Apr '21

15 Apr '21

Hi, I'm checking out some old experiments (either use or drop 'm) and here's one that made it into lmtx in the end (not much code). We have a bunch of arrays in the engine: \uccode, \lccode, \sfcode, \efcode, catcodes etc and while traditional tex just has 256 slot arrays in luatex these are sparse: it saves memory because often these lists cover a small range of unicode. Because this is kind of a general mechanism, I've added a lua interface to 'user sparse arrays' shown in the following examples (they can be 1, 2 or 4 bytes numbers): \setuplayout[tight] \setupbodyfont[tt,10pt] \starttext \startluacode local d = io.loaddata(resolvers.findfile("tufte.tex")) local a = sparse.new() for v in string.utfvalues(d) do -- sparse.set(a,v,sparse.get(a,v)+1) a[v] = a[v] + 1 end for i, v in sparse.traverse(a) do if i > 32 and v > 0 then context("%03i %U\\crlf",i,i) end end \stopluacode \blank \startluacode local a = { } local y = string.byte("1") local n = string.byte("0") for i=1,20 do a[i] = sparse.new(1,n) -- bytes (1|2|4) | default end for i=8,15 do local ai = a[i] for j=10,15 do -- sparse.set(ai,j,y) ai[j] = y end end for i=1,20 do a[i] = sparse.concat(a[i],1,20) end context(table.concat(a,"\\crlf")) \stopluacode \blank \codedef\mycode { \mycode 999 = 123} 000 = \the\mycode999\par {\global\mycode 999 = 124} 124 = \the\mycode999\par { \mycode 999 = 125} 124 = \the\mycode999\par \stoptext Often using a lua array or hash is more efficient, but when you allocate many real large sets the sparse arrays might win. I can add more options at the tex end, like wipe, concat, prealloc, save, load, always global etc. but that depends on expected usage of which I have no clue (but as usual with tex features, at some point they will be used in unexpected ways). 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 -----------------------------------------------------------------

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SVG stroked path colours
by Thangalin 15 Apr '21

15 Apr '21

A regression? % SOF \startbuffer[svg] <svg xmlns="http://www.w3.org/2000/svg" width="179" height="126" viewBox="0 0 134 94"><path fill="#e3f4d7" stroke="#2e2e2e" d="M92.23 28.768h-53c-6 0-12 6-12 12v38c0 6 6 12 12 12h53c6 0 12-6 12-12v-38c0-6-6-12-12-12"/></svg> \stopbuffer \starttext \placefigure{}{\includesvgbuffer[svg][conversion=mp]} \stoptext % EOF Expected: Green box, black outline. Actual: Green box, no outline. I believe the borders were drawn in the previous version. Current version: 2021.04.14 22:58 Thank you!

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