November 2021 - ntg-context - NTG Mailing Lists

Sum and mathalignment
by Alexandre Christe 30 Nov '21

30 Nov '21

Dear list, [image: image.png] What I've done is to play with mathalignment and \framed. Here is a MWE: \starttext \defineoverlay[midrule][{\blackrule[height=.02cm,width=5.5cm]}] \framed[frame=off,background=midrule,boffset=.65cm]{\startformula \startmathalignment[n=12,align={middle,middle,middle,middle,middle,middle,middle,middle,middle,middle,middle,middle}] \NC \NC S_6 \NC= \NC 1 \NC+ \NC 2 \NC+ \NC\dots \NC+ \NC 5 \NC+ \NC 6 \NR \NC + \NC S_6 \NC= \NC 6 \NC+ \NC 5 \NC+ \NC\dots \NC+ \NC 2\NC+ \NC 1 \NR \NC\NC 2S_6 \NC= \NC 7 \NC+ \NC 7 \NC+ \NC\dots \NC+ \NC 7 \NC+ \NC 7 \NR \stopmathalignment \stopformula} \stoptext Is there a simpler way to typeset something like this? Thanks in advance!

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Parameter order in float location matters
by Marco Patzer 30 Nov '21

30 Nov '21

Hi! Today I discovered that the parameter order in float location matters: \starttext \samplefile{knuth} \startplacefigure [location={top,none}] %% works: float is at the top \externalfigure \stopplacefigure \startplacefigure [location={none,top}] %% top is ignored here \externalfigure \stopplacefigure \stoptext Not sure if that's how it's supposed to be. In any case, I didn't expect it. Marco

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Title for tabulate
by denis.maier＠unibe.ch 30 Nov '21

30 Nov '21

Hi, when trying out different options for my last question regarding column spans I've tried out the the option regarding titles for the tabulate environment. Consider this example (adapted from the wiki): %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \setuppapersize[A6] \starttext \setuptabulate [ header=text, split=yes, title={Fenchurch St. Paul}, ] \starttabulate[|p|p|] \dorecurse{6}{ \NC Bells: \NC Tin tan din dan bim bam bom bo \NC\NR \HL \NC Name: \NC Tailor Paul \NC \NR \HL } \stoptabulate \stoptext %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% A couple of questions : - Is it possible to have the title be typeset only once? I.e., it should not repeat on each page. - How do you change the alignment of the title? (There's an align key, but that does change the alignment of the entries. Not of the title. There are headstyle and headcolor, but nothing about alignment. (\setupalign[middle] in headstyle doesn't do anything.) - How can you add bit more space after the title? Best, Denis

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Caption with hanging figure label
by Ben Moon 30 Nov '21

30 Nov '21

Hi, I’d like to create a caption with the first line hanging/outdented compared to the lines afterwards, like this: > Figure 1. Here is the line of text > that goes on to a second line. The > first line is hanging. I’ve posted this question here: <https://tex.stackexchange.com/q/623782/257399>, but was suggested to post on the mailing list. I have also seen the `hang=yes` option (from this post <https://tex.stackexchange.com/a/522242/257399>), which gives the figure label in its own ‘column’. The difference that I want is that the Figure label is in-line with the body of the caption and not in a separate column. Do you have suggestions for how to do this? Ben

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Checking for a Unicode prefix of a Unicode string
by Joey McCollum 29 Nov '21

29 Nov '21

I wasn't aware of a general-purpose "doifstartswith" macro in ConTeXt (the \doifnextcharelse macro only works one character at a time, and the \doifinstring macros may capture substrings that are not prefixes), and I'd like to develop one for something I'm working on. I've been trying to do this in Lua, as that seemed like the most natural approach. Normally, something like this would work fine as a foundation: ``` function isprefix(prefix, str) if string.sub(str, 1, string.len(prefix)) == prefix then return true end return false end ``` Unfortunately, if I want to check for prefixes that include two-byte characters like § and ¶, then the positions and string lengths that I specify no longer correspond to the actual byte offsets and lengths that Lua uses. I'm aware of the utf8 plugin that was intended to address this issue, but the following code also isn't working: ``` function sbl.isprefix(prefix, str) -- lua is devious and measures string length in bytes, not chars, -- so we can't just use string.sub and string.len as we normally would. local i = utf8.offset(str, 1) local j = utf8.offset(str, utf8.len(prefix) + 1) - 1 if string.sub(str, i, j) == prefix then return true end return false end ``` The only other detail that may be relevant is that I'm passing a macro as the "str" input. But this should be expanded when the Lua code is manipulating it, right? I'm sure there's something obvious that I'm doing wrong, but I've been trying to get this to work for at least a couple hours now, and I don't know what else to try. If there is a simple fix to my Lua code or an existing ConTeXt macro that will get the job done, I'd appreciate it! Joey

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Re: [NTG-context] Math prime issues for some fonts
by Jack Hill 29 Nov '21

29 Nov '21

On Fri, 26 Nov 2021 at 11:28, Hans Hagen <j.hagen(a)xs4all.nl> wrote: > So to summarize: with primes we have to deal with (1) frozen tex math > expectations that won't change (although in context we're free to do > so), which (2) have found their way in unicode, and (3) also in fonts > due to the way traditional tex does it, and (4) with which we cannot > deal with in the engine, so (5) we do it our own contexty way, in the > hope that (6) in the end it all looks good and (7) also gives us some of > the benefits that i don't even dare to bring up here in order not to > make it sound more complex. Thank you for the explanation. It's always interesting to hear about what goes on under the hood. > As a note: if you notice suboptional things in math fonts, don't > hesitate to make a good minimal example and then ask Mikael to look into > is because he deals with and coordinates the tuning of goodie files. I have noticed that the top bar of square root signs don't seem to connect properly with the angled part. This is visible with multiple fonts (some make it more obvious than others) at various zoom levels (I'm using Okular on Linux but other pdf viewers show the same - also on Windows). I've no idea if this is visible in print since I don't print the pdfs. The effect is also reproducible with the wiki version of context. \starttext \starttabulate[|l|c|] \FL \BC Font name \BC Math sqrt \NR \ML \NC Latin Modern Roman \NC \m{\sqrt{x}} \NR \NC TeX Gyre Termes \NC \switchtobodyfont[termes] \m{\sqrt{x}} \NR \NC TeX Gyre Pagella \NC \switchtobodyfont[pagella] \m{\sqrt{x}} \NR \NC TeX Gyre Bonum \NC \switchtobodyfont[bonum] \m{\sqrt{x}} \NR \NC TeX Gyre Schola \NC \switchtobodyfont[schola] \m{\sqrt{x}} \NR \NC STIX Two \NC \switchtobodyfont[stixtwo] \m{\sqrt{x}} \NR \BL \stoptabulate \stoptext

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ConTeXt support in LTEX
by Saša Janiška 29 Nov '21

29 Nov '21

Hello, didn't have time to (properly) test, but you might be interested to hear that since 15.2.0 release - hot from the owen - there is now support for ConTeXt as well. Sincerely, Gour -- Bewildered by the modes of material nature, the ignorant fully engage themselves in material activities and become attached. But the wise should not unsettle them, although these duties are inferior due to the performers' lack of knowledge.

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Blocks inside a conditional mode.
by Fabrice L 29 Nov '21

29 Nov '21

Dear list, I have an error when I try to insert a block inside a conditional mode (but there is two nested conditional mode.. is this the problem ?). In my courses notes, I insert some blocks (named « Complement » in the minimal exemple below) when in « Professor » mode. This works fine, as shown in the first « \beginComplement … \endComplement » of my example below. But now I have to use another condition for some blocks, depending of the number of the current course. So I insert my block with a condition, here « CourseOne » : \enablemode[CourseOne] \doifmode{CourseOne}{ \beginComplement Another complementary slide. \endComplement } But this does not work : % ———— tex error > tex error on line 1 in file /Users/fabricel/context/tex/texmf-context/tex/context/base/mkiv/cont-yes.mkiv: ! TeX capacity exceeded, sorry [input stack size=50000] % ———— The problem can be summarized in this minimal non working example : % — MWE ————————————————————— \setuppapersize[S5][S5] \enablemode[Professor] \defineblock[Complement] \setupblock[Complement][ before={\page[yes]\setuppagenumber[state=stop]\setupheadertexts[]\setupbackgrounds[page][background=color,backgroundcolor=red]}, after={\page[yes]\setuppagenumber[state=start]}] \doifallmodes{Professor} { \keepblocks[Complement] } \starttext page 1 \beginComplement A complementary slide. \endComplement page 2 \enablemode[CourseOne] \doifmode{CourseOne}{ \beginComplement Another complementary slide but only for course number 1. \endComplement } \disablemode[CourseOne] page 3 \enablemode[CourseTwo] \doifmode{CourseTwo}{ \beginComplement Another complementary slide but only for course number 2. \endComplement } \disablemode[CourseTwo] \stoptext \stoptext % — MWE ————————————————————— Blocks and modes usually works fine for me, but here, I do not understand my error. Thanks for any help ! Fabrice. Note : in case this way of doing things seems a bit silly, here are more explanations. I do use mode « CourseOne » here because in the real life, the content in the condition « \doifmode{CourseOne}{ …} » is read in an external file, containing material for « CourseOne », « CourseTwo », etc. The setup is then, in the main file : % Main file : begin ---------------- Bla bla bla ... \enablemode[CourseOne] \input ComplementMaterial.tex \disablemode[CourseOne] Bla bla bla ... \enablemode[CourseOne] \input ComplementMaterial.tex \disablemode[CourseOne] % Main file : end ---------------- And in the « ComplementMaterial.tex » there is : % ComplementMaterial.tex ————————— \doifmode{CourseOne}{ \beginComplement A complementary slide but only for course number 1. \endComplement \beginComplement Another complementary slide but only for course number 1. \endComplement } \doifmode{CourseTwo}{ \beginComplement A complementary slide but only for course number 2. \endComplement \beginComplement Another complementary slide but only for course number 2. \endComplement } % ComplementMaterial.tex —————————

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Neovim and ConTeXt
by Clint Grady 29 Nov '21

29 Nov '21

Are there any known ways to use ConTeXtLMTX with Neovim? I read the wiki page for Vim and it describes a hack to get latex-suite to work with ConTeXt. [1] It wouldn't be too much work to submit a pull-request to VimTeX (despite the name, this is for Neovim) [2] to add ConTeXt support, but I don't want to duplicate work if someone else has already done it. Clint [1]: https://wiki.contextgarden.net/index.php?title=Vim&mobileaction=toggle_view…, bottom of page [2]: https://github.com/lervag/vimtex

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Influence location of luametatex-cache
by Marco Patzer 29 Nov '21

29 Nov '21

Hi! when LMTX is installed in a read-only location (e.g. /opt) it creates a directory "luametatex-cache" in $HOME. How to influence the location of the cache directory? Marco

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