- ntg-context - Mailing Lists

lua error in `back-exp.lmt`
by Sylvain Hubert 31 Jul '24

31 Jul '24

ConTeXt LMTX version: 2024.05.27 18:16 Sample tex file: \setupbackend[export=yes] \starttext x \startsectionlevel \startitemize \item \startitemize \item \startitemize \item \stopitemize \stopitemize \stopitemize \stopsectionlevel \stoptext Error log: tex error > tex error on line 1 in file ./input.tex: lua error: registered function call [252]: ...mtx/tex/texmf-context/tex/context/base/mkxl/back-exp.lmt:1426: attempt to get length of a nil value (local 'td') stack traceback: ...mtx/tex/texmf-context/tex/context/base/mkxl/back-exp.lmt:1426: in upvalue 'pushcontent' ...mtx/tex/texmf-context/tex/context/base/mkxl/back-exp.lmt:1597: in upvalue 'collectresults' ...mtx/tex/texmf-context/tex/context/base/mkxl/back-exp.lmt:1867: in upvalue 'collectresults' ...mtx/tex/texmf-context/tex/context/base/mkxl/back-exp.lmt:1867: in upvalue 'collectresults' ..... ...mtx/tex/texmf-context/tex/context/base/mkxl/back-exp.lmt:1867: in upvalue 'collectresults' ...mtx/tex/texmf-context/tex/context/base/mkxl/back-exp.lmt:1969: in upvalue 'nodes_handlers_export' [string "local tonut = nodes.tonut..."]:27: in function <[string "local tonut = nodes.tonut..."]:12> (...tail calls...) ...mtx/tex/texmf-context/tex/context/base/mkxl/node-shp.lmt:38: in function <...mtx/tex/texmf-context/tex/context/base/mkxl/node-shp.lmt:37> (...tail calls...) 1 >> \setupbackend[export=yes] 2 3 \starttext 4 x 5 \startsectionlevel 6 \startitemize 7 \item 8 \startitemize 9 \item 10 \startitemize 11 \item mtx-context | fatal error: return code: 1

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Reminder: 18th ConTeXt Meeting , August 17-23.
by Taco Hoekwater 30 Jul '24

30 Jul '24

Dear list members, We would like to remind you that registration for the 18th ConTeXt Meeting https://meeting.contextgarden.net/2024/ will only remain open for a few more days. There are a few open onsite spots remaining, so there is still an opportunity to meet us all in person this year. You can also register to attend the online meeting, where there is no limit on the number of attendees. Meeting in person is a lot more fun, though! This year we are hosted in Lutten, The Netherlands, in a converted water tower: https://watertorenlutten-nl.translate.goog/?_x_tr_sl=auto&_x_tr_tl=en&_x_tr… We will be present online in Hraban's BBB chatroom, per usual: https://lecture.senfcall.de/hen-rbr-rku-oke The theme for this meeting is keeping up but as you know we have never been that strict about a particular theme, so feel free to suggest other topics to talk about. We are busy creating the actual schedule, but a lot of the planned talks are already mentioned on the abstracts page of the website (in random order): https://meeting.contextgarden.net/2024/abstracts.shtml Dates and deadlines • August 1st 2024, registration closes, ask for options after this deadline • August 17th–23th, 2024, 18th ConTeXt Meeting Never been to the ConTeXt Meeting? Don't worry, the group of regular participants is open and friendly, and you don't know what you are missing, unless you come at least once. Different discount options https://meeting.contextgarden.net/2024/fee.shtml are available. We hope to see you in August! Ton, Hans, and Taco — Taco Hoekwater E: taco(a)bittext.nl genderfluid (all pronouns)

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Can LMTX help me with this PDF manipulation?
by Gerben Wierda 30 Jul '24

30 Jul '24

I have a large PDF with mostly vector and a bit of pixel graphics. It is in two colours only (the pixels are either one colour or the other, no dithering). I want to create a new PDF of a segment of the larger PDF (bottom left corner), where vector is maximally preserved, and where one colour is replaced by 100% transparency. I was wondering if that is doable by using LMTX instead of trying to do this with some GUI app. Thanks, Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>, Mastodon <https://newsie.social/@gctwnl>) R&A IT Strategy <https://ea.rna.nl/> (main site) Book: Chess and the Art of Enterprise Architecture <https://ea.rna.nl/the-book/> Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/> YouTube Channel <http://www.youtube.com/@GerbenWierda>

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How to hide any content?
by Joel 30 Jul '24

30 Jul '24

I have a strange issue with some macros that are creating extraspaces between paragraphs. Note these macros shouldn’t create anycontent, as they define content that will be sent to registers andcontent that is used for page references. Its more like invisibledata, perhaps the word is “metadata” and other parts of thedocument need to know it and refer to it, but nothing should berendered there. As best as I canunderstand, when ConTeXt sees one of these macros, it creates avertical space after the paragraph, draws nothing, then createsanother vertical space after that, before drawing the next paragraph,so the result is something close to three lines of space. Whenappearing after a section title, its also as if there is an emptyline, then blank space, then the first paragraph of content appears. Sample of what the rendered document looks like: ----- Section Title .<--if the macro is placed here, a huge empty space after thesection title is there .<-- I’m using these dots to represent empty lines Loremipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmodtempor incididunt ut labore et dolore magna aliqua. Ut enim ad minimveniam, quis nostrud exercitation ullamco laboris nisi ut aliquip exea commodo consequat. Duis aute irure dolor in reprehenderit involuptate velit esse cillum dolore eu fugiat nulla pariatur.Excepteur sint occaecat cupidatat non proident, sunt in culpa quiofficia deserunt mollit anim id est laborum.\mymacro{}<--even ifthe macro is placed here, still in the paragraph, it creates a break . .<--the macro appears here, there is an empty space above and before . Loremipsum odor amet, consectetuer adipiscing elit. Imperdiet suspendisseporttitor tempus arcu turpis cras posuere varius. Volutpat posueresemper nunc metus fermentum egestas? Aenean diam nisl tortor fuscefacilisis hendrerit dolor penatibus. Lectus interdum platea rhoncusat leo; ut mi duis. Nisi vehicula morbi curabitur mus urna sodalessuspendisse sodales. Viverra inceptos sem aenean ultricies congueligula condimentum maecenas. Convallis in elementum risus nec tacitibibendum faucibus ac nascetur. Nulla ligula auctor placerat dignissiminceptos. Felis nulla quam viverra augue maximus hendrerit ipsum. . <--where the macro doesn’t appear, the spacing between paragraphs isfine (here, no macro, so one line of empty space, not three) Loremipsum odor amet, consectetuer adipiscing elit. Turpis himenaeosconubia neque fringilla neque class. Elementum per fermentum nostraullamcorper lacinia tortor pellentesque facilisis. Himenaeos sociosqutellus aptent rhoncus dignissim himenaeos aliquam? Nisi sagittiseuismod tincidunt penatibus eget tristique? Sed nam elit sapientellus mus libero. Consectetur nascetur nec metus pretium hacmolestie. Convallis lacinia quam efficitur convallis; metus purusaliquet. ----- I’ve analyzed themacros carefully, even rebuilt them. Yet, no matter my attempts torecreate and rewrite the code from scratch, they always create thisvertical space. They shouldn’t create any content, nor should anyevidence of their existence be visible to readers. I’ve tried formonths to find a way to hide these macros, rewriting the code itselfmany times, as I can’t see any reason why its creating anything atall, and also trying to find ways to hide the “blank” contentthat gets rendered: \starteffect[hidden]\mymacro{}\stopeffect \color[white]{\mymacro} \setbox\scratchbox=\vbox{\mymacro} \startnointerference\mymacro\stopnointerference \inmargin{\mymacro} Thesesolutions either entirely don’t remove the extra page break, orlead to the actual content within breaking: for instance, if there’san \index{} entry inside the macro, its page number won’t renderproperly in the end-of-document index. Or if there’s a \reference,other code attempting to display the page number just shows “page,??”. Isthere a way to completely hide content, such that nothing at all isrendered on the page and nothing occupies extra blank space, but thatdoesn’t brak indexes, cross-references, registers, etc.? --Joel

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How can I force ConTeXt to display my footnote on the same page as my foot note marker?
by ai2472206007＠yeah.net 29 Jul '24

29 Jul '24

Hi, I have a document that contains a lot of footnotes. Therefore, I used to separate the footnote number from the footnote text, which would make the source file look more readable. Therefore, I used a similar approach to 'CASE 1', but not 'CASE 2' , placing footnotes related to the previous paragraphs every few paragraphs. But when I was generating a PDF, I found that the footnote didn't always appear on the same page as its footnote number, even though the footnote had very little text. What can I do to get my idea to work? Thanks for any suggestions. Muyik. % The above text was translated through Bing % because I am not a native English speaker. % If there is anything unclear, whatever it is, tell me. %%%%%%%%%%%%%% \setuppapersize[A6] \starttext % case 1 \input knuthmath \note[1] \input knuthmath \note[2] \input knuthmath \input knuthmath \footnotetext[1]{\input knuthmath } \footnotetext[2]{\input knuth } % In this case, the text of footnotes 1 and 2 is placed on the same page, % but they are separated from the footnote numbers on different pages \page % case 2 \input knuthmath \note[1] \footnotetext[1]{\input knuthmath } \input knuthmath \note[2] \input knuthmath \input knuthmath \footnotetext[2]{\input knuth } % Maybe this situation might get what I wanted, but after all, % footnotes are not as important as the main text, % and working on the footnotes while writing the main text may not be the right way for me \stoptext %%%%%%%%%%%%%%

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correcting Wikipedia
by Pablo Rodriguez 26 Jul '24

26 Jul '24

Dear list, just by accident, I discovered that the English Wikipedia had attributed ConTeXt to https://en.wikipedia.org/wiki/Hans_Hagen (a German computer science professor). I corrected this info and also removed the internal links to that article that belong to “our” Hans (Hagen). Just in case the wording may be improved, I wrote (reprashing a previous sentence and adding two links to pages with photo): (Prof. Dr.) Hans Hagen is not to be confused with Hans Hagen, the author of the ConTeXt macro package for the TeX typesetting system.[5] [5] ConTeXt’s author comes from the Netherlands (he is a digital typographer, no academic). In any case, German Hans Hagen and Dutch Hans Hagen are clearly not the same individual. Many thanks in advance, Pablo

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Emacs and spell check
by Shiv Shankar Dayal 25 Jul '24

25 Jul '24

Hi, Does anyone use Emacs with ConTeXt with spell check? Can you please share your Emacs config for this? -- Respect, Shiv Shankar Dayal

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MetaPost background
by alan.caruanambom＠gmail.com 23 Jul '24

23 Jul '24

Hello, I need the background (lines and points) to be inside (tangent) of the frame, I don't know how to do it \startuseMPgraphic{fullheightbackground} fill unitsquare xyscaled (OverlayWidth, OverlayHeight) withcolor "gray" ; w := MakeupWidth; h := OverlayHeight; draw (0,0)--(MakeupWidth,0) withpen pencircle scaled 2pt withcolor green; draw (0,OverlayHeight)--(MakeupWidth,OverlayHeight) withpen pencircle scaled 2pt withcolor green; drawdot (0,0) withpen pencircle scaled 8pt withcolor red; drawdot (MakeupWidth,OverlayHeight) withpen pencircle scaled 8pt withcolor red; \stopuseMPgraphic \defineoverlay [fullheightbackground] [\useMPgraphic{fullheightbackground}] \setupframedtexts [background=fullheightbackground, backgroundoffset=0pt, frame=on] \starttext \startframedtext[width=\textwidth,align=left] \input knuth \stopframedtext \stoptext

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About a pagination
by Fabrice Couvreur 23 Jul '24

23 Jul '24

Hi, I'm trying to get the same pagination as in the attached photos. Using the wiki and Wolfgang's codes I get something interesting but not very elegant (\ACFRAME{}). Only, I don't see how to emphasize the title of each chapter in the same way. Thanks. Fabrice \startcomponent[essai] \setuplayout [ backspace=28mm, topspace=35mm, width=140mm ] \setuppagenumbering[alternative=doublesided,location=] \setupbodyfont[pagella,11pt] \mainlanguage[fr] \setcharacterspacing [frenchpunctuation] \startuseMPgraphic{acframeleft} fill OverlayBox leftenlarged (BackSpace) rightenlarged 5mm withcolor "lightgray"; setbounds currentpicture to OverlayBox; \stopuseMPgraphic \defineoverlay [acframeleft] [\useMPgraphic{acframeleft}] \defineframed [ACFRAMELEFT] [frame=off, width=fit, height=1ex, background=acframeleft, location=, ] \startuseMPgraphic{acframeright} fill OverlayBox leftenlarged 5mm rightenlarged 42mm withcolor "lightgray"; setbounds currentpicture to OverlayBox; \stopuseMPgraphic \defineoverlay [acframeright] [\useMPgraphic{acframeright}] \defineframed [ACFRAMERIGHT] [frame=off, width=fit, height=1ex, background=acframeright, location=hanging, ] \setupheader[style=\tfx] \startsetups [header:leftpage] \setuplabeltext [fr] [chapter=\tfx Chapitre] \ACFRAMERIGHT{} \hfill \labeltext{chapter} \getmarking[chapternumber] \getmarking[chapter] \stopsetups \startsetups [header:rightpage] \getmarking[sectionnumber] \space \getmarking[section] \hfill \ACFRAMERIGHT{} \stopsetups \setupheadertexts [\directsetup{header:rightpage}] [\prefixedpagenumber] [\prefixedpagenumber] [\directsetup{header:leftpage}] \defineframedtext [ChapterFrame] [frame=on, width=local, height=broad, after={\blank[2*line]}, offset=0pt] \startsetups [section:chapter] \setuphead [chapter] [align=leftright, textcommand=\groupedcommand{\blank[medium]}{}, numbercolor=, textstyle=, numberstyle=, numbercommand=, before=\startChapterFrame, after=\stopChapterFrame, header=nomarking] \stopsetups \startsectionblockenvironment [bodypart] \directsetup{section:chapter} \stopsectionblockenvironment \doifmode{*component}{\directsetup{section:chapter}} \setuplabeltext [fr] [chapter=\tf Chapitre\space] \startchapter [title={Polynômes}] \startsection [title={Forme réduite et identification}] \dorecurse{6}{\input knuth} \stopsection \startsection [title={Polynômes du second degré}] \dorecurse{6}{\input knuth} \stopsection \stopchapter \stopcomponent

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spacing in columns
by Hans van der Meer 23 Jul '24

23 Jul '24

The first screenshot has its items neatly stacked and is made with \startsimplecolumns[n=2] \placenotes[endnote] \stopsimplecolumns The second screenshot has its items wide apart and is made with \startcolumns[n=2,blank=1pt] \placenotes[endnote] \stopcolumns Question: how do I get rid of the interline space in the last case. Whatever I fill in for blank= doesn't make a difference, the output is always the same. yours sincerely dr. Hans van der Meer

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