November 2023 - ntg-context - NTG Mailing Lists

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 21 Nov '23

21 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 20 Nov '23

20 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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ConTeXt Group Subscriptions
by Keith McKay 20 Nov '23

20 Nov '23

Hi, I was wondering if the reminder for the ConTeXt Group Membership subscriptions had been sent out? It's been over a year since I took out membership and I thought I would have had a reminder by now. I hope I haven't missed the email. Best Wishes Keith McKay

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Metapost label text surrounded by white border
by Emanuel Han 19 Nov '23

19 Nov '23

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;

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Problem with textstyle
by Rik Kabel 17 Nov '23

17 Nov '23

Hello list, The following example does not compile, complaining “Missing number, treated as zero needed to see a number, look up 'weird error' in the index to The TeXbook”: \setuphead [chapter] [ textstyle=cap, ] \starttext \startchapter [title={Oops!}] \input knuth-gpt \par \stopchapter \stoptext Replacing the textstyle /cap/ by any of /bold/, /slanted/, /smallcaps/, and /italic/ results in a clean compilation but the indicated style is not applied. Using a style description like /em/, /\em/, /bf/, /\bf/, /\sc,/ does produce the suggested result. The wiki and mail repository are full of examples with the former style names. Using /style=cap/ (which would change the number as well) also results in a failed compilation, while using /style=bolditalic/ works as it should. ConTeXt ver: 2023.09.26 18:19 LMTX fmt: 2023.10.9 int: english/english -- Rik

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wrong destination types?
by Pablo Rodriguez 17 Nov '23

17 Nov '23

Dear list, I have the following sample: \setupinteraction[state=start, page=name, focus=standard] \starttext a\footnote{b} \stoptext In \setupinteraction, "focus=standard" is ignored when I use "page=name". I mean, link destinations are to the full page and they alter the page view (when the document is not viewed as full page). Sorry, I don’t have other way to say it. I should get (only named destination value): 7 0 obj << /D [ 6 0 R /XYZ 76.84458 722.7349 null ] >> endobj And I’m getting: 4 0 obj << /D [ 1 0 R /Fit ] /S /GoTo >> endobj Could anyone confirm the issue or explain me what I’m doing wrong? BTW, "page=name" is required for references to named destinations in external documents. I get the same results with both LMTX and MkIV from current latest (2023.09.26 18:19). Many thanks for your help, Pablo

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