October 2021 - ntg-context - NTG Mailing Lists

TeX's \downbracefill and \upbracefill
by Rudolf Bahr 12 Oct '21

12 Oct '21

Hello to all, in Knuth's "The TeXbook" page 225/226 (excerpt is appended here) braces are to be seen which I'd need to typeset a genealogical table. Now, the commands \downbracefill and \upbracefill are no context commands. Please, are there correspondings to them? Regards, Rudolf

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Converting LaTeX math to ConTeXt
by Jason Ross 12 Oct '21

12 Oct '21

Hello, I'm trying to provide more support for LaTeX math for an Org Mode exporter for ConTeXt. LaTeX is the de facto standard for mathematics in Org Mode. However, the syntax is quite different between LaTeX and ConTeXt. I have a few ideas, but none that I'm happy about. 1. Export LaTeX to MathML then import that into ConTeXt. I don't know how to get this to work. latexmlmath only returns the first row of `align` environments (for me anyway). Also, this would require users to install another program. 2. Typeset equations with LaTeX as standalone pages and then include them as images. This will typeset everything with LaTeX defaults. Also, either equation alignment or equation numbering will break. 3. Hack every math environment I can think of to accept LaTeX syntax (see https://wiki.contextgarden.net/LaTeX_Math_in_ConTeXt) Lots of work, lots of problems as described in the article. End-users could add their own hacks to the template preamble for cases I don't get to. 4. Manually parse and convert every LaTeX math environment to ConTeXt before exporting. Basically a non-starter. I'm wondering what's the best way to go about this. Surely others have run into the same problem? Thanks, Jason

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body text and footnote space
by jbf 12 Oct '21

12 Oct '21

Dear list, I note previous discussions on the matter of body text invading footnote space (as late as last year). As I am currently typesetting a 400 plus page academic text with hundreds of footnotes, and do not have the option of making them endnotes, I am facing this issue page after page. The only solution I have for now is to make per page layout adjustments to reduce a line or two, so there is a way to handle it, but given ConTeXt's 'perfection' generally, I would be very interested to know if there is any other solution forthcoming. I've tried various options in \setupfootnotes and \setuptolerance', but to no avail. Julian

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Outlined text (from MP) inline in ConText has incorrect baseline (i.e. no depth)
by Rudd, Kevin 12 Oct '21

12 Oct '21

Hey--- I'm trying to insert outlined text (derived from MetaFun example code) into a document and it seems to work up to the point that the text has depth (descenders). There's a previous post that mentions using textcommand for titles to ensure that the appropriate baseline is used but I haven't figured out why that would work; for my purposes, I'm insert the text inline so that solution wouldn't work here. I have included a MWE that demonstrates the problem; I've tried putting both the text and the outlined text in a box, then adjusting the outlined text by the depth of the text itself but that doesn't seem to work. I expect that there's an easy way either in MP or ConTeXt, but I haven't found it yet. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % \OutlinedText[glyph][outline]{text} \def\OutlinedText{\dodoubleempty\doOutlinedText} \def\doOutlinedText[#1][#2]#3% {% % ((((\type{#1}::\type{#2}::\type{#3})))) \ifsecondargument \makeOutlinedText{#1}{#2}{#3}% \else\iffirstargument \makeOutlinedText{#1}{black}{#3}% \else \makeOutlinedText{white}{black}{#3}% \fi\fi } \def\makeOutlinedText#1#2#3% {% \startMPcode draw outlinetext.b("#3") (withcolor "#1") (withcolor "#2" withpen pencircle scaled 1/16); \stopMPcode \autoinsertnextspace } \starttext start \OutlinedText{aaa} and \OutlinedText{Bbb} and \OutlinedText{ggg} and \OutlinedText{Yyy} finish \stoptext %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% (Here is the code with my attemps to shift the baseline; the \dp & \wd approach seems to do nothing, and the \lower doesn't compile and I haven't pursued why yet.) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % \def\makeOutlinedText#1#2#3% % {% % \newbox\tBox % \newbox\uBox % \setbox\tBox\hbox{#3} % \setbox\uBox % \hbox{% % \startMPcode % draw outlinetext.b("#3") % (withcolor "#1") % (withcolor "#2" withpen pencircle scaled 1/16); % \stopMPcode % }% % % \lower\uBox\dp\tBox % \ht\uBox=\ht\tBox % \dp\uBox=\dp\tBox % \unbox\uBox % \autoinsertnextspace } %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Any feedback or suggestions would be appreciated. ---K Kevin W. Rudd, Ph.D. CAPT, USN (Ret) Computer Architecture & Computer Engineering Advanced Computing Systems (ACS) Research Program Laboratory for Physical Sciences (LPS) 443-654-7878 kevin(a)lps.umd.edu<mailto:kevin@lps.umd.edu> Visiting Research Professor United States Naval Academy rudd(a)usna.edu<mailto:rudd@usna.edu>

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combination with lua
by Adam Reviczky 12 Oct '21

12 Oct '21

Hi, I am trying to use a combination figure with luacode (both with latest MKIV and LMTX). However, the figures do not line up in the grid of the combination. I get the correct result with examples 1 and 2 below, but example 3 using lua functions for combination and externalfigure is what I wanted to use in the first place. MWE: \starttext \startluacode -- Combination 1 context.startplacefigure({title = "Figure"}) context.startcombination({nx = "2", ny = "2"}, "\\externalfigure[cow][width=50mm]","Caption 1", "\\externalfigure[cow][width=50mm]","Caption 2", "\\externalfigure[cow][width=50mm]","Caption 3", "\\externalfigure[cow][width=50mm]","Caption 4" ) context.stopcombination() context.stopplacefigure() -- Combination 2 context.startplacefigure({title = "Figure"}) context.startcombination({nx = "2", ny = "2"}, "Picture 1","Caption 1", "Picture 2","Caption 2", "Picture 3","Caption 3", "Picture 4","Caption 4" ) context.stopcombination() context.stopplacefigure() -- Combination 3 context.startplacefigure({title = "Figure"}) context.startcombination({nx = "2", ny = "2"}, context.externalfigure({"cow"},{width = "50mm"}),"Caption 1", context.externalfigure({"cow"},{width = "50mm"}),"Caption 2", context.externalfigure({"cow"},{width = "50mm"}),"Caption 3", context.externalfigure({"cow"},{width = "50mm"}),"Caption 4" ) context.stopcombination() context.stopplacefigure() \stopluacode \stoptext Any hints on what I am doing wrong in example 3? Thanks, Adam

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Clickable url problem with \useurl and \url
by Rik Kabel 12 Oct '21

12 Oct '21

Hello List, I notice an inconsistency in the clickable area when using \useurl. With the following example, both the \from and the \url are clickable in some lines (as noted iin the value of \from) but in others, the \from is clickable but not the \url. It does seem sensitive to the urlL, but I cannot see a pattern. Example: \setupinteraction [state=start] \useurl[earlBA] [https://www.bartleby.com/sv/welcome.html] [] [Not clickable] \useurl[earlPD] [https://www.perseus.tufts.edu/hopper/] [] [Not clickable] \useurl[earlWC] [https://www.worldcat.org/] [] [Not clickable] \useurl[earlFC] [https://www.futilitycloset.com/] [] [Not clickable] \useurl[earlQU] [http://www.quote-unquote.org.uk/] [] [Not clickable] \useurl[earlAL] [https://www.aldaily.com/] [] [Not clickable] \useurl[earlTL] [http://stephanus.tlg.uci.edu/] [] [Not clickable] \useurl[earlQI] [https://quoteinvestigator.com/] [] [Clickable] \useurl[earlLH] [https://languagehat.com/] [] [Clickable] \useurl[earlSF] [https://stancarey.wordpress.com/] [] [Clickable] \starttext \from[earlLH] (\url[earlLH]) \par \from[earlQI] (\url[earlQI]) \par \from[earlFC] (\url[earlFC]) \par \from[earlWC] (\url[earlWC]) \par \from[earlQU] (\url[earlQU]) \par \from[earlAL] (\url[earlAL]) \par \from[earlSF] (\url[earlSF]) \par \from[earlBA] (\url[earlBA]) \par \from[earlPD] (\url[earlPD]) \par \from[earlTL] (\url[earlTL]) \par \stoptext Should I use something other than \url[earlXX] here to get the clickable literal url from useurl? -- Rik Kabel

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TLS Certificate Expired for the Wiki
by Ramkumar KB 12 Oct '21

12 Oct '21

Hello, The TLS certificate for the Context wiki expired yesterday - valid only upto 12-October-2021. Just an alert as Chrome now pops up the "Unsafe" alerts. Thank you, best regards, Ramkumar

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Unusual error with \doifinstring in \startbtxrenderingdefinitions ... \stopbtxrenderingdefinitions
by Joey McCollum 11 Oct '21

11 Oct '21

Hi, I'm trying to define concise biblatex-style citation macros for a custom bibliographic style specification with support for intelligent placement of trailing punctuation, and I've encountered an unusual error. If I try to define the macros within the btxrenderingdefinitions environment, then the code for handling trailing punctuation with the \doifinstring and \doifnotinstring macros fails in some cases. Specifically, it correctly detects when the trailing punctuation is a period, comma, or semicolon, but not when it is a colon, exclamation point, or question mark. The following MWE reproduces the error: ``` \startbtxrenderingdefinitions[myspec] \def\autopuncttest#1#2{% \removeunwantedspaces% \doifinstring{#2}{,.!?;:}{#2}% \footnote{#1}% \doifnotinstring{#2}{,.!?;:}{#2}% } \stopbtxrenderingdefinitions \usebtxdefinitions[myspec] \starttext This works \autopuncttest{Footnote 1}, as does this \autopuncttest{Footnote 2}; and so does this \autopuncttest{Footnote 3}.\blank But this one fails if defined in the bib spec \autopuncttest{Footnote 4}!\blank And why does this one fail in the bib spec too \autopuncttest{Footnote 5}?\blank \stoptext ``` Everything works as expected if the macro definition is outside of the btxrenderingdefinitions environment. But within the environment, do certain punctuation marks need to be escaped in the second argument of \doifinstring? Or is this a bug? Joey

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Generating HTML
by Hans Åberg 11 Oct '21

11 Oct '21

I would want to generate HTML, but in the example below, "html-test.tex", the index does not show in the file "html-test-export/html-test-div.html", and the source file \index{…}, gets in the HTML a black triangle. The index and links work fine in "html-test.pdf", though. — html-test.tex — \definefontfamily [mainface][math][stix] \setupbodyfont [mainface,10pt] \setupinteraction[state=start, click=yes, focus=standard, color=darkblue] \setupbackend[export=yes] % Exporting HTML/XML \defineregister [index] \setupregister [index] [indicator=no] \startchapter[title={Introduction}] Foobar\index{foobar} out of working order. \startbodymatter Foo\index{foo} or bar\index{bar}. \startbackmatter \completeindex \stopbackmatter \stoptext —

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Re: [NTG-context] Making metafun pictures fainter (shading, uncolored clash)
by Gavin 11 Oct '21

11 Oct '21

Hi List, I made good progress producing fainter pictures in metafun. Here is a uniformly accelerated cow in the style of my book. I abandoned transparency, since I actually don’t want to see through anything. I am using uncolored to get the fade. It works great with a picture that is made with fill and draw, but it doesn’t work with shading. The example below has a flat disk and a round ball. The disk looks fine, but the shaded ball is not surviving the application of inverted / uncolored. \startMPinclusions picture disk, ball; disk := image( fill fullcircle scaled 1cm withcolor .4white; draw fullcircle scaled 1cm withpen pencircle scaled 0.8pt ;); ball := image( fill fullcircle scaled 1cm withshademethod "circular" withshadecenter (.25,.25) withshadecolors (.8white, black); draw fullcircle scaled 1cm withpen pencircle scaled 0.8pt ;); \stopMPinclusions \startMPpage draw inverted (disk uncolored .1white) ; draw inverted (disk uncolored .2white) shifted (0.25cm,0) ; draw inverted (disk uncolored .5white) shifted (1cm,0) ; draw disk shifted (2.25cm,0) ; draw inverted (ball uncolored .1white) shifted (0, -2cm) ; draw inverted (ball uncolored .2white) shifted (0.25cm, -2cm) ; draw inverted (ball uncolored .5white) shifted (1cm, -2cm) ; draw ball shifted (2.25cm, -2cm) ; \stopMPpage Same result in LMTX and MkIV. (ConTeXt ver: 2021.09.17 10:01 LMTX fmt: 2021.9.21 int: english/english) I’m pretty happy with this uncolored trick, and will be even happier if I can get it to work with the shadings. Any suggestions? Gavin

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