October 2021 - ntg-context - NTG Mailing Lists

Acrobat doesn’t read imported metadata
by Pablo Rodriguez 11 Oct '21

11 Oct '21

Dear list, I have the following sample: \starttext \startluacode function document.transfer_metadata(name) local main_doc = lpdf.epdf.load(name) lpdf.addtoinfo("Title", lpdf.unicode(main_doc.Info.Title), lpdf.string(main_doc.Info.Title)) lpdf.addtoinfo("CreationDate", lpdf.string(main_doc.Info.CreationDate)) lpdf.addtoinfo("ModDate", lpdf.string(main_doc.Info.ModDate), main_doc.Info.ModDate) lpdf.epdf.unload(name) end \stopluacode \unexpanded\def\TransferMetadata#1% {\ctxlua{document.transfer_metadata("#1")}} \startTEXpage[offset=1em, align=center] \ssbf metadatos\\importados \TransferMetadata{metadata.pdf} \stopTEXpage \stoptext Being the sample file https://pdf.ousia.tk/metadata.pdf, Acrobat cannot display the imported title or either the creation or modification dates. What am I missing to make Acrobat display the imported metadata? Many thanks for your help, Pablo -- http://www.ousia.tk

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Short forms and abbreviations in bibliography
by Joey McCollum 11 Oct '21

11 Oct '21

Hi, It is a common practice to use short forms of titles for bibliographic entries after they are cited the first time. Another practice is to use abbreviations for journal names and book series (generally for citations in the text, but possibly also in the references list), with a separate "List of Abbreviations" provided to cross-reference the abbreviations and full names. I think that these practices could be accommodated with multiple bibliographies that contain short and long forms for corresponding entries, but I wanted to ask: is there a simpler or preferred way to do this in ConTeXt? To illustrate what I mean, the biblatex-sbl package ( https://github.com/dcpurton/biblatex-sbl) which implements the SBL citation style for (Xe)LaTeX, handles this using additional fields like "shorttitle," "shortjournal," and "shortseries," so for the BibTeX-style bibliographic entry @book{Blau2010, author = {Joshua Blau}, title = {Phonology and Morphology of Biblical Hebrew}, shorttitle = {Phonology}, series = {Linguistic Studies in Ancient West Semitic}, shortseries = {LSAWS}, volume = {2}, location = {Winona Lake, IN}, publisher = {Eisenbrauns}, year = {2010} } the initial in-text citation (in SBL style) would look something like Joshua Blau, *Phonology and Morphology of Biblical Hebrew*, LSAWS 2 (Winona Lake, IN: Eisenbrauns, 2010), while subsequent in-text citations would look like Blau, *Phonology*. A separate list of abbreviations would then list "LSAWS" alongside "Linguistic Studies in Ancient West Semitic" (and likewise for other journal/series abbreviations). Thank you! Joey

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composing commands
by Hans Hagen 11 Oct '21

11 Oct '21

Hi, As I'm going over the commands in lmtx, I wonder if we should keep \c \d \k \r \u \v \" \' \` \^ etc ... the ones that make 'composed characters'. I think that anyone who needs them uses utf . They can be in (say) m-oldschool.mkxl or so. Objections? Hurt feelings? Sentiments? Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

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SyncTeX does not work with Zathura
by Cezary Drożak 11 Oct '21

11 Oct '21

Hello, I have been trying to get SyncTeX to work with ConTeXt and Zathura, but nothing seems to work. I created a simple `hello.mklx` file and ran `context --synctex=-1 hello.mklx`. Then I launched Zathura with `zathura -x "nvr -cc \"call vimtex#view#reverse_goto(%{line}, '%{input}')\" --nostart" hello.pdf`. When I clicked "Hello, world!" while holding a control key it printed the following error to console: ``` (org.pwmt.zathura:80241): GLib-CRITICAL **: 15:49:12.359: g_variant_new_string: assertion 'string != NULL' failed warning: Failed to obtain data via SyncTeX or data is incomplete. ``` I am attaching the `hello.mklx`, `hello.pdf` files and the generated `hello.synctex` file. I am getting the same result with `--synctex=1`. Regards, Cezary Drożak

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ConTeXt's equivalent of raisebox
by noib3 11 Oct '21

11 Oct '21

How can I make vertical microadjustments to individual characters in ConTeXt? In LaTeX I would do it with ``` \documentclass{article} \begin{document} \raisebox{-1pt}{f}oo \end{document} ``` however the following doesn't work ``` \starttext \raisebox{-1pt}{f}oo \stoptext ```

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undefined command in current latest
by Alexandre Christe 11 Oct '21

11 Oct '21

Update: after updating Context again today the issue is gone.

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undefined command in current latest
by Pablo Rodriguez 10 Oct '21

10 Oct '21

Dear list, I have the following sample: \setupheadertexts[{\getmarking[chapter]}] \starttext \chapter{Chapter} \stoptext It compiles perfectly fine with MkIV from 2021.10.08 20:18, but its LMTX version triggers the following error message: Undefined control sequence \??markingfilter Previous LMTX version compiled just fine. I think it might be a bug. Many thanks for your help, Pablo -- http://www.ousia.tk

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Making metafun pictures fainter
by Gavin 10 Oct '21

10 Oct '21

Hi list, I’m trying to produce figures like this, showing motion as a series of snap-shots, with the earlier moments more faint. Here are three examples of metafun code using transparency and “decorated". \startMPinclusions picture ball; ball := image( draw fullcircle scaled 1cm withshademethod "circular" withshadecenter (.25,.25) withcolor "lightgray" shadedinto black; draw fullcircle scaled 1cm withpen pencircle scaled 0.8pt;); \stopMPinclusions \starttext \startMPpage draw decorated (draw ball) withtransparency (1,.2); draw decorated (draw ball shifted (1cm, 0cm)) withtransparency (1,.4); draw decorated (draw ball shifted (4cm, 0cm)) withtransparency (1,.6); draw ball shifted (9cm, 0cm); \stopMPpage \startMPpage draw decorated (draw ball) withtransparency (1,.2); draw decorated (draw ball shifted (0.25cm, 0cm)) withtransparency (1,.4); draw decorated (draw ball shifted (1cm, 0cm)) withtransparency (1,.6); draw ball shifted (2.25cm, 0cm); \stopMPpage \startMPpage draw decorated (draw ball) withtransparency (1,.2); filldraw fullcircle scaled 1cm withcolor white withpen pencircle scaled 0.8pt shifted (0.25cm, 0cm); draw decorated (draw ball shifted (0.25cm, 0cm)) withtransparency (1,.4); filldraw fullcircle scaled 1cm withcolor white withpen pencircle scaled 0.8pt shifted (1cm, 0cm); draw decorated (draw ball shifted (1cm, 0cm)) withtransparency (1,.6); draw ball shifted (2.25cm, 0cm); \stopMPpage \stoptext Transparency alone does a good job if the objects don’t overlap (first example). If they do overlap, it’s kind of a mess (second example). I get a much better result if I put a white circle behind each transparent ball so that they look lighter without showing the earlier objects through them (third example). However, that solution is going to be difficult for more complex shapes. I tried drawing the shape using “redecorated () withcolor white", to draw the white background object, but only the outline appears white. The circular shading disappears altogether, leaving the ball fill area transparent. I also tried to use something like “softened .8” but could not get that to produce any output. Any ideas? Thanks! Gavin

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Default values for key-value macros
by noib3 10 Oct '21

10 Oct '21

The way I've been defining key-value macros is to first pass them to Lua, handle the parsing there thanks to `utilities.parsers.settings_to_hash` and then assign the resulting Lua table to ConTeXt variables. This worked fine up to now, but I'm having problems with the following MWE: ``` \def\style#1[#2] { \ctxlua{userdata.style([==[#2]==])} \placestyle } \startluacode userdata = userdata or {} userdata.style = function(keyvals) local style = { color = nil, text = nil, } args = utilities.parsers.settings_to_hash(keyvals) for k, v in pairs(args) do style[k] = v end context.setvariables({'style'}, style) end \stopluacode \define\placestyle{ \doiftext {\getvariable{style}{text}} {\color[\getvariable{style}{color}]{\getvariable{style}{text}}} } \starttext \style[ text={Some red text}, color=red, ] \style[ color=blue, ] \stoptext ``` Here I assign a default value of `nil` to every key, and then check if the `text` variable is empty before printing it. I would expect the second macro not to print anything since its `text` should be nil, instead both macros print 'Some red text', the first one in red and the second one in blue. I have attached a screenshot of the output. What am I doing wrong?

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SciTE configuration Mac
by MANUEL GONZALEZ SUAREZ 10 Oct '21

10 Oct '21

Hi everyone: Could someone send me a minimal configuration for the SciTE editor of the files needed to work with ConTeXt? I work with MaC OS Big Sur. Thanks. M. González.

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