- ntg-context - Mailing Lists

Compatibility Issue with TikZ/Spy Library in ConTeXt: Seeking Solutions
by wolfgangbackes＠mail.de 24 Nov '23

24 Nov '23

Hello, I am reaching out to seek assistance regarding a compatibility issue I have encountered after installing ConTeXt on a new computer. The problem arises when attempting to compile documents that utilize the spy library; the LuaTeX engine returns the following error message: "error (luacall): invalid number mtx-context | fatal error: return code: 1" Unfortunately, the error message provides no additional clues. To investigate further, I created a minimal example, which you can easily verify at https://context-on-web.eu/. The example employs the spy library within a TikZ environment. Surprisingly, the same example runs without error on my local LaTeX engine, indicating a potential compatibility issue between ConTeXt and the spy library. Here is the minimal example for your reference: \starttext \usemodule[tikz] \usetikzlibrary {spy} \starttikzpicture[spy using overlays={size=12mm}] \draw (0,0) -- (1,1) -- (2,-1); \spy [blue,magnification=5] on (1,1) in node at (3,0); \stoptikzpicture \stoptext I am curious if anyone else has encountered a similar problem with the spy library and ConTeXt and, if so, if there is a known solution. Any insights or guidance would be greatly appreciated. Thank you for your time and assistance. Best regards, Wolfgang Backes

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Invalid certificate for distribution.contextgarden.net
by Marco Patzer 23 Nov '23

23 Nov '23

Hi! The site https://distribution.contextgarden.net/ uses an invalid certificate: echo | openssl s_client -servername 'distribution.contextgarden.net' -connect 'distribution.contextgarden.net':443 2>/dev/null | openssl x509 -noout -ext subjectAltName X509v3 Subject Alternative Name: DNS:4tex.ntg.nl, DNS:mailman.ntg.nl, DNS:mysql-admin.ntg.nl, DNS:ntg.nl, DNS:www.ntg.nl This makes connections fail. distribution.contextgarden.net has to be added to the Alternative Name list. Marco

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It works after a few changes but ..
by Ursula Hermann 23 Nov '23

23 Nov '23

Dear List, After a few changes i have here an example: It works, but what I wanted to know is why are there round brackets after writing \starttheroem if i compile it. Should be without round brackets. I have the following example, the text was in a PDF from 2008, called: Theorems in ConTeXt, and also my text with the margin: \definemargindata [MyInMargin][inright] \definemarginframed[MyInMargin][topframe=on,bottomframe=on,rulethickness=1pt,width=1cm] \margintext{\blackrule[color=black, height=0.25ex, width=1cm]\\}\blackrule[color=black, height=0.25ex, width=7cm] \setupenumerations [ before={\blank[big]}, after={\blank[big]}, location=serried, width=broad, distance=0.5em, headstyle=bold, titlestyle=normal, way=bytext, conversion=numbers] \defineenumeration [theorem] [ text=Theorem, title=yes, style=italic, list=all, listtext={Theorem }] \starttext \margintext{2.1.1}{\starttheorem {The square on the hypotenuse is equal to the sum of the squares on the other two sides. Ach is das schön, dass du da bist} \stoptheorem \stoptext Maybe someone can help me.

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externalfigure crashed
by Hans van der Meer 22 Nov '23

22 Nov '23

When \externalfigure could not find the file it used to graciously place a rectangle kindly telling the user that the file has not been found. But now, however, it seems the default in this case is a crash. Very annoying in comparison with the earlier behaviour. I might make a mistake, but the MWE is as simple as can be. The filename is test.jpeg, then this runs ok: \starttext \externalfigure[test.jpeg][] \stoptext But this crashes, see the log: \starttext \externalfigure[test.jpg][] \stoptext yours sincerely dr. Hans van der Meer

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Re: xmlpos values doubled
by Benjamin Buchmuller 22 Nov '23

22 Nov '23

Hi list, I came across this old thread as I was trying to use \xmlpos{#1} to "dynamically" create references such as \item[mystep:\xmlpos{#1}] to be referenced when other elements of this node are parsed at a later point. In fact, it seems that \xmlpos{#1} returns duplicate values. This might indeed be the intended meaning of \xmlpos{#1} as it seems related to the XML query foo/bar/index() which only looks up the position in the parent node. (I noticed that if I run this repeatedly, I get somehow different values from times to times. I can't say why.) Anyways, I was wondering if there is a TeX command to access the absolute position of an element in the tree? Similar to foo/bar[rootposition()] (or foo/bar[order()]? – Can't make sense of the entry in the XML manual.) Thank you for your help! Benjamin > Hi Ben, > > I think that both \xmlpos and \xmldepth give weird results. > > With this minimal sample: > > \startbuffer[text] > <doc>first level > <s>second level > <ss>third level</ss> > <ss>third level</ss> > </s> > <s>second level > <ss>third level</ss> > <ss>third level</ss> > </s> > <s>second level > <ss>third level</ss> > <ss>third level</ss> > </s> > </doc> > \stopbuffer > > \startxmlsetups xml:text > \xmlsetsetup{#1}{doc|s|ss}{xml:*} > \stopxmlsetups > > \xmlregistersetup{xml:text} > > \startxmlsetups xml:doc > \chapter{\xmlpos{#1}\letterat\xmldepth{#1}: \xmlflush{#1}} > \stopxmlsetups > > \startxmlsetups xml:s > \section{\xmlpos{#1}\letterat\xmldepth{#1}: \xmlflush{#1}} > \stopxmlsetups > > \startxmlsetups xml:ss > \subsection{\xmlpos{#1}\letterat\xmldepth{#1}: \xmlflush{#1}} > \stopxmlsetups > > \setuphead[chapter,section,subsection][before=,after=,] > \starttext > \xmlprocessbuffer{main}{text}{} > \stoptext > > \xmldepth shows values that I think are +1 than they should be. > > \xmlpos counts in pairs and not in units (as you wrote, 2, 4, 6...). > > Hans, could you check whether this is working as expected? > > Sorry, but if this isn’t a bug, I have no idea of what I may be missing. > > Pablo >

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Markdown to HTML cross-references
by Thangalin 22 Nov '23

22 Nov '23

Hi list, I'm looking to implement a consistent syntax for cross-references in KeenWrite <https://keenwrite.com/> and am wondering what you think would make the most sense for translating into ConTeXt commands. First, some background (the first two give an overview, the others are cross-reference references for various syntaxes): - https://talk.commonmark.org/t/cross-references-and-citations/4013/7 - https://thesynack.com/posts/markdown-captions - https://quarto.org/docs/authoring/cross-references.html - https://mystmd.org/guide/cross-references - https://lierdakil.github.io/pandoc-crossref - https://github.com/tomduck/pandoc-eqnos I'm leaning towards the following syntax: Markdown Item (table, blockquote, TeX block, figure, code, R chunk, etc.) : caption text {#type:label} See [@type:label] for details. There's a unit test that shows what's currently being generated with a number of examples for images, tables, blockquotes, internationalization, and so on: https://gitlab.com/DaveJarvis/KeenWrite/-/blob/main/src/test/java/com/keenw… The code is a work-in-progress; so the tests may have changed depending on if/when you view the Java source code. Presently, the captions produce anchor references, mostly. The following seems easier to typeset using ConTeXt: <p><span class="caption">Meschiya Lake - Lucky Devil <a data-type="lyrics" name="blues" /></span></p> This diverges from the HTML specification for tables (table/caption) and figures (figure/figcaption). It would also mean having to write ConTeXt macros that flip the spans and anchors to produce a caption such as: *Lyrics 1.1.* Meschiya Lake - Lucky Devil While there are plenty of ways of presenting captions (e.g., multi-column images with sub-figure numbers) the majority of cross-references are to a single "thing" with a single "caption". What are your thoughts on this proposal? (Keeping in mind I'm the only person working on KeenWrite and while I'm trying to keep the syntax compatible with pandoc, implementing the full pandoc-crossref syntax is out of scope for me. Thank you!

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Strange behavior with anglestriped()
by Fabrice Couvreur 21 Nov '23

21 Nov '23

Hi, I don't understand why the hatching of the two rectangles is not the same color. Thanks for your help. Fabrice \starttext \setupbodyfont[8pt] \startMPcode path p, q, r, b ; z[0] = (2cm,0cm) ; z[1] = (2cm,2cm) ; z[2] = (0cm,2cm) ; p := unitsquare xyscaled (9cm, 5cm) ; q := llcorner p--z[0]--z[1]--z[2]--cycle ; r := unitsquare xyscaled (7cm,3cm) shifted(2cm,2cm) ; b := z[2]--z[1]--ulcorner r--urcorner p--lrcorner r--z[1]-- z[0]--llcorner p--cycle ; draw b anglestriped (1,45,2) withcolor cyan; draw q anglestriped (1,45,2) withcolor cyan; draw p ; label.llft("A", p) ; label.lrt("D", p) ; label.ulft("B", p) ; label.urt("C", p) ; label.lft("M", z[2]) ; label.ulft("N", z[1]) ; label.bot("P", z[0]) ; label.top("J", ulcorner r) ; label.rt("I", lrcorner r) ; label.bot(btex $x$ etex,(llcorner p+z[0])/2); label.lft(btex $x$ etex,(llcorner p+z[2])/2); \stopMPcode \stoptext

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Re: Metapost label text surrounded by white border
by Emanuel Han 21 Nov '23

21 Nov '23

Thanks Hraban. This indeed helped. It‘s my first reply in this mailing list. Hope I do it right by „replying to all“. > Am 19.11.2023 um 19:37 schrieb Henning Hraban Ramm <texml(a)fiee.net>: > > Am 19.11.23 um 16:41 schrieb Emanuel Han via ntg-context: >> I'd like to surround black text with a white 1mm thick border in a Metapost label. Here is my code, which doesn't draw the border at all and which draws the text in white instead of black (I'm using mkiv and mkxl version 2023.09.26 18:19 on osx-arm6): >> | >> |beginfig(1); >> % Define the text and colors >> string label_text; >> label_text = "Your Text"; >> color text_color, border_color; >> text_color = black; >> border_color = white; >> % Draw the label with the specified colors >> label(textext(label_text) scaled 1.0, origin) withcolor text_color withpen pencircle scaled 1mm withcolor border_color; >> endfig;| > > Have a look into luametafun.pdf (p.10) if lmt_outline does what you want. > > Hraban > ___________________________________________________________________________________ > If your question is of interest to others as well, please add an entry to the Wiki! > > maillist : ntg-context(a)ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl > webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) > archive : https://github.com/contextgarden/context > wiki : https://wiki.contextgarden.net > ___________________________________________________________________________________

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Drawing calligraphy practice grid in metafun
by Andres Conrado Montoya 21 Nov '23

21 Nov '23

Hello list I've been working on a little project of mine. I give calligraphy workshops and I have been using a nice tool created by Josselin Cuette, available at http://ductus.josselincuette.com/ to generate practice templates for interested people. However, I would prefer to have an offline solution. This adventure started with the usual insidious idea: "I could do this in ConTeXt! And this is a great opportunity to learn metafun!" A couple weeks later, I have an almost ready product! It compiles fine, but I have the following issue: The template creates a Line, composed of Sections. And uses variables to assign a measurement for the nib-width, and an amount of ascender, x-height and descender Sections (nib-widths), to compose a Line. But also, I would like to, if needed, display nib-width marks on the left side. My code so far generates marks, but only for the first Line. I think they are generated but maybe they are placed on top of each other, maybe? I'm not sure why my logic is not working. Also, if I change the amount for ascenders, descenders of x-height, the marks are not drawn correctly. My current path for a mark is a custom path emulating two unit squares, nib-width size, on top of each other, with the top one shifted a nib-width to the right. A little bit like a chess board, or a scale ruler on a map. But this would only work in Lines that have an even amount of Sections. I'm not sure how to proceed with that... I tried using unit squares, but that made things very complex, and after fumbling around I managed to get this far. If you can take a look, or have some advice, it would be greatly appreciated. I hope it is understandable. My code: %%%%%%%%%%%%%%%%%% \setuppapersize[letter,landscape][letter,landscape] \setuplayout[backspace=15mm,width=250mm,header=0mm,footer=0mm] \startreusableMPgraphic{pauta} % Global variables: % Show nib-width marks boolean marks ; marks := true ; % Path for nib-width path mark ; mark := (0,0) -- (1,0) -- (1,2) -- (2,2) -- (2,1) -- (0,1) -- cycle ; % Line width numeric line ; line := \the\textwidth ; % Type box numeric box ; box := \the\textheight ; % Nib width (distance between lines) numeric nib ; nib := 3mm ; % Ascenders for writing line numeric asc ; asc := 3 ; % x-height for writing line numeric med ; med := 4 ; % Descenders for writing line numeric dsc ; dsc := 3 ; % Total height of a writing line in mm (including asc, med, and dsc) numeric lineHeight ; lineHeight = (asc + med + dsc) * nib ; % Available lines on a page numeric availableLines ; availableLines = round(box / lineHeight) - 1 ; % Starting position numeric start ; start := 0 ; % Macros % Draw a section of a line (ascender, x-height or descender) vardef Section(expr lines, initial) = draw (0, initial) -- (line, initial) withpen pencircle scaled 0.2mm ; for i=0 step 1 until lines : save final ; final = i*nib ; pair a; a = (0, final + initial) ; pair b; b = (line, final + initial) ; draw a -- b withpen pencircle scaled 0.1mm ; % If marks=true show nib-width marks if marks = true: fill mark scaled nib yshifted (final*2) ; fi ; endfor ; draw (0, final + initial) -- (line, final + initial) withpen pencircle scaled 0.2mm ; final + initial enddef ; % Draw a line with the three secions (asc, med, dsc) vardef Line(expr descender, ascender, xheight, initial) = numeric dd, oo, aa ; % Líneas dd = Section(descender, initial) ; oo = Section(xheight, dd) ; aa = Section(ascender, oo) ; % Devolver posicion final con espacio para siguiente renglon aa + nib*2 enddef ; % Llenar la página con renglones for i=1 upto availableLines : start := Line(dsc, asc, med, start) ; endfor ; \stopreusableMPgraphic \startdocument \startstandardmakeup \reuseMPgraphic{pauta} \stopstandardmakeup \stopdocument %%%%%%%%%%%%%%%%%%%%%%%%%% -- 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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learning about the grid
by Miguel Diaz 20 Nov '23

20 Nov '23

Hi everyone, being a newbie I just discovered how different setups for the grid may affect my (very simple) document. In the Details manual (which of course I don't understand because of my unexperience) I read that many people don't use the grid, but when I configure grid=no the whole lines of a section are printed one over the other. Playing with the options and setupinterlinespace I got the unhappily desired 1.3ex that may school requieres for the teaching programs (grid=line, interlinespace=1.3ex), but I somehow feel that's not the right way to go. 1. Why are the lines printed one over the other when grid=no? how do profis then use context without grid? 2. Is there a document where I can read how the grid is conceived to work for the many options in a simple way? thanks in advance

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