June 2024 - ntg-context - NTG Mailing Lists

How to improve appearance of bars in frac, sqrt, etc. on screens?
by Ralph 07 Oct '24

07 Oct '24

Hello, I’m relatively new to ConTeXt (version 2024.05.31, LMTX, standalone) and really enjoy learning it so far, but I have one little problem with the appearance of horizontal bars in math mode. It seems the way ConTeXt displayed horizontal extensible bars in math mode some time ago (as used in \frac, \sqrt, \overbar, ...) was similar to the way LaTeX (PDFLaTeX and LuaLaTeX) and Plain TeX handled this, but it has changed since then. Instead of one bar there are now multiple characters attached to each other. This makes it look more consistent with the font, but unfortunately it doesn’t display well in any PDF viewer I’ve tried (on Linux, so I’ve not tried Adobe Acrobat Reader). The bars look dotted, I guess it’s due to anti-aliasing (the dots disappear when anti-aliasing is disabled, but then of course everything looks pixelated). Two screenshots are attached (different zoom levels in PDF viewer) so that you know what I’m talking about. Source: \setuppapersize[S3] \starttext \startformula \sqrt{a^2 + b^2} = \frac{1000 \cdot c}{1000} \stopformula \stoptext Is there a way to switch to the old bars for documents viewed mainly on screens, or is there any other way to improve their appearance? I couldn’t find any documentation on this, so I would be very thankful if somebody here could help out. Best, Ralph

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PDF/UA-2, WTPDF
by Henning Hraban Ramm 20 Sep '24

20 Sep '24

Quoting a post by Philipp Kiff, https://mastodon.social/@pkiff/112219488889350928: In amongst the release of PDF/UA-2 (PDF for Universal Accessibility) and the new Well-Tagged PDF (WTPDF) standard last month, some PDF professionals may have missed two other new resources that may help explain and view them: 1. Questions and Answers about Tagged PDF from PDF association 2. Acrobat Custom File Info Panels by Peter Wyatt Last month saw the release of PDF/UA-2 and the new Well-Tagged PDF (WTPDF) standard - neither of which revokes PDF/UA-1. And none of those are the same as PDF 1.7 vs 2.0. To many, the landscape of PDF specs may now seem littered with confusing acronyms and versions! For some help disentangling it all, the PDF association has a Questions and Answers about Tagged PDF: https://pdfa.org/resource/tagged-pdf-q-a/ In related news, Peter Wyatt released Acrobat Custom File Info Panels. This is a free extension for Acrobat that adds new panels to the XMP metadata shown when you view File > Properties in Acrobat Pro. The new panels allow you to view the additional conformance claims and dated revisions of ISO standards that can now be included in PDFs, but that aren't currently visible in the standard Acrobat panels. https://pdfa.org/discovering-pdf-metadata/ One thing I realized in reading through the new standards and looking at various sample files this week is that I should probably spend some time learning LaTeX! Both LaTeX and LibreOffice are already capable of producing PDF/UA-2 files, and with some tweaking, LaTeX can produce what appear to be really good WTPDF files. Kudos to both those development teams! https://github.com/latex3/tagging-project/discussions/72 Finally, in case you missed earlier posts from last month, here are links to the official sources for the two new PDF standards that these other resources relate to: 1. PDF/UA-2 https://pdfa.org/iso-14289-2-pdfua-2/ 2. Well-Tagged PDF (WTPDF) https://pdfa.org/wtpdf/

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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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table float split behavior
by Henning Hraban Ramm 10 Jul '24

10 Jul '24

Table floats split in odd places, independent of top/page/here location. There’s always a first part, then some not-float text, then the other parts. Even if the table would fit on two pages (with location=page), it always gets split into three. Can I influence this anyhow? Hraban \usemodule[visual] \starttext \samplefile{tufte} \startplacetable[location={top,split},title=table split test] \bTABLE%[setups=twoparamstable] \bTABLEhead \bTR\bTH One \eTH\bTH Two\eTH\bTH Three \eTH\eTR \eTABLEhead \bTABLEbody \dorecurse{60}{% \bTR\bTD #1\eTD\bTD \fakewords{1}{10}\eTD\bTD \fakewords{1}{10}\eTD\eTR } \eTABLEbody \eTABLE \stopplacetable \samplefile{knuth} \stoptext

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regular online meet-up
by Henning Hraban Ramm 10 Jul '24

10 Jul '24

I nearly forgot: You’re invited to our regular online meet-up, this upcoming Wednesday, June 12th, 19:00 CEST (UTC+2) at https://lecture.senfcall.de/hen-rbr-rku-oke (same, but shorter: https://u.mtxrun.eu/ctxmtg) ConTeXt users of all levels are welcome! Do you have a subject that you’d like to talk about? Looking forward to seeing you, Hraban (Same blurb as always:) [Howto] * No special software installation required; most modern browsers should work (WebRTC required). * Open the URL above, accept the privacy statement, * enter your name, * click "join" (or "start" if you’re the first), * click "with microphone", allow your browser to access it, check the audio. * Your microphone is muted if you join. Activate microphone and/or camera with the buttons at the bottom. * Minimize the default presentation with the "screen" button, bottom right. * If you’d like to share your screen or upload a file, you can make yourself the presenter: Click on your user name, change the setting, then you’ll see the "screen sharing" button beside the camera button; also there’s now "manage presentations" behind the "plus" button. Beware there is only one presenter at a time, so don’t kill someone else’s presentation. [Technical hints] * Sound is usually better if you use a headset (less noise for everyone). * Connection problems are mostly due to low bandwidth or high latency on your side, e.g. with mobile connections. * Sometimes leaving and re-entering helps. * If audio/video doesn’t work for you, you can still use the text chat. * Screen sharing needs a lot of bandwidth. * BigBlueButton documentation applies: https://bigbluebutton.org/teachers/tutorials/ [Netiquette] * Please use a name that we recognize from here. Some feel uncomfortable with anonymous lurkers. * Mute your microphone while you’re not talking. * It’s nice to show your face at least when you join. * If there are connection problems, stop camera sharing. * The room is set to “everyone’s a moderator“, I trust you...

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index sort order (de)
by Henning Hraban Ramm 08 Jul '24

08 Jul '24

Hi, I checked the German index sorting rules, and as far as I can tell, all of them are somewhat wrong. – de, default, or no setting (just mainlanguage de) – Duden - DIN 5007-1(:2005) - DIN 5007-2(:1996) - de-AT IMO, "Duden" is obsolete, should be the same as default; it makes no sense to have a default setting that doesn’t adhere to the official rules. If Û#m not mistaken it’s also the same as DIN 5007-1; maybe there was a difference before 2005. (DIN 5007-2 and de-AT have their uses.) The order of umlauts etc. should be ok. [ß] In tex/context/base/mkiv/sort-lan.lua, ß is replaced by s, while it should be sorted like ss in default and both DIN versions. (de-AT sorts ss after ß.) [upper-/lowercase] While casing is not mentioned in Wikipedia (https://de.wikipedia.org/wiki/Alphabetische_Sortierung) Duden „Satz und Korrektur“ says: Uppercase characters get sorted the same as lowercase (i.e. mixed), but if both appear, lowercase comes first. ATM all German settings sort lowercase behind uppercase. Generally, default method seems to be not "default" but "before". Does this make sense? If we look at the method presets, there’s none for {zm,pm,zc,zm,uc} (upper like lower, ignore diacritics – basic default for German). """ \mainlanguage[de] \setupregister[index][language=de] \starttext \index{Apfel} \index{Äpfel} \index{apfel} \index{äpfel} \index{aepfel} \index{Aepfel} \index{Ápfel} \index{ápfel} \page \completeindex \stoptext """ default order should be: aepfel Aepfel apfel Apfel äpfel Äpfel ápfel Ápfel aqua DIN 5007-2 sorts like: aepfel Aepfel äpfel Äpfel apfel Apfel ápfel Ápfel aqua de-AT sorts like: aepfel Aepfel apfel Apfel aqua äpfel Äpfel ápfel Ápfel Hraban

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Use headcommand in \definedescription together with \definehighlight
by Gerion Entrup 01 Jul '24

01 Jul '24

Hi, I was in the process to convert an itemize part to a description and wanted to simplify the code in the same move. I discovered headcommand for that, but struggled to set the text in an highlight _and_ make a colon at the end. Do you know, if this is possible? Here is a MWE: ``` \definehighlight[hl][style={\m{>}\,\switchtobodyfont[tt]}] \definedescription[category][ alternative=top, headstyle=bold, width=broad, ] \definedescription[desc][ width=broad, distance={\widthofstring{~}}, headcommand={\groupedcommand{\hl}{:}}, % headcommand={\groupedcommand{}{:}}, % this compiles but the highlight is lost % headcommand={\groupedcommand{\starthl}{\stophl :}}, % this does not compile headstyle=, before={\startpacked}, after={\stoppacked}, alternative=hanging, ] \starttext This is a \hl{highlight}. Some listings \startcategory{Itemize} \startitemize[packed] \item \hl{first}: one \item \hl{second}: two \stopitemize \stopcategory Now the same as desc: \startcategory{Desc} \startdesc{first} one \stopdesc \startdesc{second} two \stopdesc \stopcategory \stoptext ``` The itemize looks like it should look (except of the dots). Best, Gerion

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Re: Flowcharts
by Wolfgang Schuster 29 Jun '24

29 Jun '24

Otared Kavian schrieb am 29.06.2024 um 14:36: > Thanks Wolfgang ! > I added the hint to the wiki: https://wiki.contextgarden.net/Flow_Charts > > > Out of curiosity, why should one say > \startFLOWcell[background=color,backgroundcolor=red] > ... > \stopFlowcell > > while > \startFLOWcell[backgroundcolor=red] > … > \stopFLOWcell > > seem to work as well ? > > Thanks again and best regards: Otared You're right, there is no need for "background=color" because each cell already has a background color by default. Wolfgang

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No roman numerals in frontmatter header
by jbf 29 Jun '24

29 Jun '24

Perhaps someone can advise me where I am going wrong. I have no trouble getting roman numeral page numbers in the footer text in frontmatter with \startsectionblockenvironment [frontpart] \setupuserpagenumber [numberconversion=romannumerals] \setcounter [userpage] [5] \stopsectionblockenvironment \startsectionblockenvironment [bodypart] \setcounter [userpage] [1] \stopsectionblockenvironment \setuppagenumbering [alternative=doublesided,location={footer,middle}] But if I change to \setuppagenumbering[location= ], and choose, for example: \setupheadertexts [ ] [{\getmarking[chapter]\hskip1em \pagenumber}] [{\pagenumber \hskip1em \documentvariable{metadata:title}}] [ ] I get my header texts with page numbers in arabic numerals in frontmatter. I have tried various \setupheadertexts options, but I still get arabic numerals in frontmatter. The conversion does not work. What am I missing or doing wrong? Julian

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SciTE
by Lutz Haseloff 28 Jun '24

28 Jun '24

Hi Hans, hi all, I try to use SciTE for ConTEXt. One problem seems to be the file scite-context-internal.properties in recent cont-sci zip. My Ubuntu says it is a binary file. Is this intended? Greetings Lutz

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