August 2021 - ntg-context - NTG Mailing Lists

Using Lua to format lecture titles
by noib3 17 Aug '21

17 Aug '21

I'm trying to create a new lecture environment starting from the base section. I'd like its title to be `Lecture <number>: <title>` if a title is provided, and `Lecture <number>` if it isn't. This title should also be reported in the left footer and in the table of contents. This is the code I have so far: ``` \definehead [lecture] [section] \setuphead [lecture] [ command=\Lecture, style=\bfc, ] \setuplabeltext [lecture={Lecture}] \define[2]\Lecture{\ctxlua{ userdata.format_lecture_title({ label = context.labeltext('lecture'), number = [==[#1]==], title = [==[#2]==], }) }} \setupfootertexts [\ctxlua{ userdata.format_lecture_title({ label = context.labeltext('lecture'), number = context.getmarking({'lecturenumber'}), title = context.getmarking({'lecture'}), }) }] [pagenumber] \startluacode userdata = userdata or {} function userdata.format_lecture_title(args) if args.title and args.title ~= '' then context('%s %s: %s', args.label, args.number, args.title) else context('%s %s', args.label, args.number) end end \stopluacode \setupcombinedlist [content] [list={lecture}] \setuplist [lecture] [ alternative=c, command=\Lecture, % this seems to have no effect? ] \starttext \completecontent % Both title and left footer should be 'Lecture 1: Foo' \startlecture [title={Foo}] Foo bar baz \stoplecture \page % Both title and left footer should be 'Lecture 2' \startlecture [] Foo bar baz \stoplecture \stoptext ``` Unfortunately none of them are reported correctly. The title in the body is formatted simply as `Lecture`, the one in the left footer is formatted as `Lecture<number><title>`, and the one in the table of contents isn't affected at all. What am I doing wrong?

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compression for multimedia objects
by Pablo Rodriguez 17 Aug '21

17 Aug '21

Hi Hans, some days ago (after the patch from https://mailman.ntg.nl/pipermail/ntg-context/2021/103011.html) I included two mp4 files in a PDF document. They where so generated, that they could be compressed in a zip file from 254MB into less than 25MB. The resulting PDF file was less than 25MB. With the current latest, compression for multimedia objects is disabled. The same PDF document takes about 254MB. I don’t know whether this is intended. In that case, could we have an option to compress embedded multimedia objects? (I know that those mp4 files are crappy, but I can’t control the crap others generate.) Many thanks for your help, Pablo -- http://www.ousia.tk

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How not to display the header of the chapter page on the page with the table of contents ?
by Fabrice Couvreur 16 Aug '21

16 Aug '21

Hello, Wolfgang created a heading https://mailman.ntg.nl/pipermail/ntg-context/2021/102870.html for the chapters of my book. How can I prevent this header from appearing on the page with the table of contents ? Thanks Fabrice

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Adjustment in the table of contents
by Fabrice Couvreur 16 Aug '21

16 Aug '21

Hi, I wish to have the table of contents as the attached image. The result is almost as expected except for the margin of the subsection. \setuplist [chapter,section,subsection] [width=fit,distance=\spaceamount] \setuplist [chapter] [alternative=b] \setuplist [chapter][style=bold] \setuplist [section] [margin=1em] \setuplist [subsection] [margin=2.75em] Thanks Fabrice

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Strange behavior of a macro
by Fabrice Couvreur 16 Aug '21

16 Aug '21

Hello, I don't understand why this macro works with this simple example but return the following error if I use it for chapters in my book. Thanks Fabrice %%%% \setupbodyfont [newcomputermodern-book,11pt] \unexpanded\def\N{\math{\mathbb{N}}\autoinsertnextspace} \defineenumeration [test] [title=yes, text={Test}, style=italic] \starttext \N \starttest \m{\forall n \in \N} \stoptest \stoptext %%%% tex error > tex error on line 64 in file ./terminale_suites_2.tex: Use of \N doesn't match its definition <line 3.64> Soient \u, \v deux suites définies sur \N, \m{l} et \m{l'} deux réels. 54 \startitem 55 \u converge vers \m{l}, 56 \stopitem 57 \stopitemize 58 alors \m{l\geqslant 0}. 59 \stopproposition 60 \startremarque 61 Nous retiendrons que le passage à la limite sur une inégalité stricte restitue une inégalité large. 62 \stopremarque 63 \startcorollaire 64 >> Soient \u, \v deux suites définies sur \N, \m{l} et \m{l'} deux réels. 65 66 Si 67 68 \startitemize 69 \startitem 70 les suites \u et \v convergent respectivement vers \m{l} et \m{l'}, 71 \stopitem 72 \startitem 73 \m{\forall n \in\mathbb{N}, \thinspace u_n>v_n}, 74 \stopitem If you say, e.g., '\def\a1{...}', then you must always put '1' after '\a', since control sequence names are made up of letters only. The macro here has not been followed by the required stuff, so I'm ignoring it. mtx-context | fatal error: return code: 256 %%%%

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result saved in file: ./file.pdf
by Peter Münster 16 Aug '21

16 Aug '21

Hi, The latest version of ConTeXt writes "result saved in file: ./file.pdf" instead of "saved in file: file.pdf", that breaks the error-checker of AucTeX. Is this wanted? Or are you going to change it back to a filename without the "./"? TIA, -- Peter

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'--noconsole' or '--batchmode` still logs to console? | 1.04 Aug-10 version
by Ramkumar KB 16 Aug '21

16 Aug '21

Hi, I noticed that (in the latest version) that context command with '--batchmode' or '--noconsole` still logs to the console? Not sure if this is a regression issue. I am using the 1.04 Aug-10 version. best regards, Ramkumar

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Progressively encouraging page/column breaks at \blank with penalties
by Joey McCollum 16 Aug '21

16 Aug '21

Hi, I'm trying to implement a section break marker in a grid layout. At a section break, two lines of space should separate the subsequent segments of text (just plain paragraphs, in this case), and a symbol (in the example below, "X") should be set in the middle of these two lines. For my purposes, the section break symbol should never occur at the top of a page or column, and it is more desirable to have a page or column end with the section break symbol than to have a single orphaned line follow the symbol at the end of the page or column. Based on these constraints, I thought that using the "samepage" and "preference" options for the first and second line breaks would work nicely: ``` \define\SectionBreak{% \blank[halfline, samepage]% non-breaking to ensure that no column begins with the section break symbol \startalignment[middle]% {X}% section break symbol \stopalignment% \blank[halfline, preference]% this can (and, if possible, should) be broken across a column ``` This does successfully prevent the placement of the symbol at the top of a page/column, but it doesn't encourage the placement of the symbol at the end of a page/column as often as I would like. I tried replacing the "preference" option with options with better negative penalties, like "penalty:-1000", "penalty:-2000", and even "penalty:-5000", but these didn't make any difference. The option "penalty:-10000" trivially works, but it forces a page/column break at every section break marker, which is far too extreme. Is this normal behavior? I would have thought that progressively more negative penalties would gradually encourage page/column breaks, but this doesn't seem to happen. In the following MWE, the "preference" and "penalty" options (apart from "penalty:-10000") for the second line break don't change the total page count or appearance of the final page at all (which would be expected in a document of this size): ``` \setuplayout[ grid=yes %enable baseline grid ] \setupinterlinespace[18bp] % text line spacing %Define macro for section break: \define\SectionBreak{% \blank[halfline, samepage]%non-breaking to ensure that no column begins with the section break symbol \startalignment[middle]% {X}% section break symbol \stopalignment% \blank[halfline]% a column break here is neither encouraged nor discouraged % \blank[halfline, preference]% this should encourage a column break here, but it doesn't seem to make a difference % \blank[halfline, penalty:-1000]% still no difference % \blank[halfline, penalty:-2000]% still no difference % \blank[halfline, penalty:-5000]% still no difference % \blank[halfline, penalty:-10000]% this works, but it is too extreme! } %Set things up for fakewords: \usemodule[visual] \setupsystem[random=10] \starttext \dorecurse{400}{\fakewords{20}{100}\SectionBreak} \stoptext ``` As always, any help is appreciated! Joey

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Failure when loading variable font
by Marcel Krüger 15 Aug '21

15 Aug '21

Hi, the latest ConTeXt version fails for the following document: \definefontfeature [default:test] [default] [axis={Weight=100}] \definefont [SomeFont] [file:Fraunces.ttf*default:test] \starttext \SomeFont Abcdef \stoptext and the font from https://github.com/undercasetype/Fraunces/raw/master/fonts/Fraunces%5BSOFT%… renamed to Fraunces.ttf with the error message otf reader > user instance: weight=100, factors: 0 -1.0 0 0 otf reader > fatal error in file 'Fraunces.ttf': ...e0dde776fb1556f32e/formats/luametatex/font-ttf-macro.lua:274: attempt to index a nil value (local 'p1') stack traceback: ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2339: in metamethod 'index' ...e0dde776fb1556f32e/formats/luametatex/font-ttf-macro.lua:274: in upvalue 'applyaxis' ...e0dde776fb1556f32e/formats/luametatex/font-ttf-macro.lua:1428: in field 'gvar' ...e0dde776fb1556f32e/formats/luametatex/font-ttf-macro.lua:1155: in local 'reader' ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2084: in upvalue 'readtable' ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2197: in upvalue 'readdata' ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2252: in function <...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2235> [C]: in function 'xpcall' ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2341: in upvalue 'loadfont' ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2396: in field 'loadfont' ...mtx/tex/texmf-context/tex/context/base/mkiv/font-otl.lua:160: in field 'load' ...mtx/tex/texmf-context/tex/context/base/mkiv/font-otl.lua:599: in upvalue 'otftotfm' ...mtx/tex/texmf-context/tex/context/base/mkiv/font-otl.lua:627: in function <...mtx/tex/texmf-context/tex/context/base/mkiv/font-otl.lua:626> (...tail calls...) ...mtx/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:377: in function <...mtx/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:365> (...tail calls...) ...mtx/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:483: in field 'read' ...mtx/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:1336: in function <...mtx/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:1193> (...tail calls...) fonts > otf loading > loading failed due to read error (This run used luametatex, but the same issue occurs when using luatex) The same font worked correctly with the ConTeXt version from 2021-05-20. Best regards, Marcel

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Re: [NTG-context] new upload/issue with t-vim?
by Benjamin Buchmuller 14 Aug '21

14 Aug '21

I'm not sure if it's related to this latest: ConTeXt ver: 2021.08.07 22:53 LMTX fmt: 2021.8.8 int: english/english or a previous one, but with this one: ConTeXt ver: 2021.07.30 00:57 LMTX fmt: 2021.8.8 int: english/english My document compiled fine. When I use the t-vim module (freshly installed again from the garden; but I also tried to replace some files from the GitHub, but not sure if I did it right …), I now get an error when I do something like \usemodule[vim] \definevimtyping[vimR] \typevimRfile{path_to_file.R} % specifically: {../sourcecodes/myfile.R} -- lua error > lua error on line 2 in file virtual://block.sourcecode.7: token call, execute: ...ConTeXt/tex/texmf-context/tex/context/base/mkiv/l-io.lua:70: bad argument #1 to '?' (string expected, got nil) stack traceback: [C]: in ? (...tail calls...) ...ConTeXt/tex/texmf-context/tex/context/base/mkiv/l-io.lua:70: in function 'io.loaddata' ...onTeXt/tex/texmf-context/tex/context/base/mkiv/l-md5.lua:91: in upvalue 'checksum' ...eXt/tex/texmf-context/tex/context/base/mkiv/grph-fil.lua:97: in field 'run' [ctxlua]:1: in main chunk <empty file> -- Any clues? For the moment, I switched back to the older version as I have to get some work finished, which is why I can't dig deeper at the moment. If a MWE would help, I'll try to make one later this week. Thanks Benjamin

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