January 2025 - ntg-context - NTG Mailing Lists

images with alt text
by Steffen Wolfrum 06 Feb '25

06 Feb '25

Hi, as publishing houses (at least in Germany) are forced to provide «alt text» with their PDF-publications (from June 2025 on), I need to know how «images with alternate text» (https://en.wikipedia.org/wiki/Alt_attribute) are typeset with ConTeXt LMTX. In HTML it looks like this: <img src="example.jpg" alt="Example text"> What is the equivalent in ConTeXt LMTX? Yours, Steffen

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Error when running context --make after updating context (FreeBSD)
by Potzilov K. 01 Feb '25

01 Feb '25

Hi folks, I receive the following error when running context --make command (after update via install.sh): lua error > lua error on line 18 in file file-mod.mklx: token call, execute: ...ext/tex/texmf-context/tex/context/base/mkxl/file-mod.lmt:78: attempt to call a nil value (field 'getrunstate') stack traceback: ...ext/tex/texmf-context/tex/context/base/mkxl/file-mod.lmt:78: in local 'code' ...ext/tex/texmf-context/tex/context/base/mkiv/util-lua.lua:97: in field 'loadedluacode' ...ext/tex/texmf-context/tex/context/base/mkiv/luat-env.lua:108: in field 'luafilechunk' ...ext/tex/texmf-context/tex/context/base/mkxl/luat-cod.lmt:82: in function 'lua.registercode' [ctxlua]:1: in main chunk <empty file> A number should have been here; I inserted '0'. (If you can't figure out why I needed to see a number, look up 'weird error' in the index to The TeXbook.) Any clues as to what causes this error? System is FreeBSD 14.2 TIA and regards, PT

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(no subject)
by Ursula Hermann 31 Jan '25

31 Jan '25

Dear List From the page: Text blocks/Environments/Lists of items, in the point Customization details and examples Manual labels I have tried the second example. But I don't know what to do, because, as you can see on the pdf, I got the wrong text. \startitemize[R,fit][itemalign=flushright,stopper={ --- }] \dorecurse{5}{\item blablabla} \stopitemize Many thanks Uschi

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does \setuplayout[grid=yes] require \startformula[split=line] ?
by garulfo＠azules.eu 29 Jan '25

29 Jan '25

Hi, sorry for the potentially puzzling title. I try to figure out why \setuplayout[grid=yes] seems to insert a line break in a short formula. Is there a way of ensuring regular vertical alignment of the formula number without ‘split=line’ ? Many thanks for your help. %%% START \setuppapersize[A6,landscape] \enabletrackers[math.showmargins.less] \startsetups[math:penalties:mathincontext] \shapingpenaltiesmode \zerocount \widowpenalties 3 5000 250 100 \clubpenalties 3 5000 250 100 \stopsetups \setupformula [split=mathincontext] \starttext Text \startplaceformula \startformula c^2 = a^2 + b^2 \stopformula \stopplaceformula \setuplayout[grid=yes] \page Text \startplaceformula \startformula c^2 = a^2 + b^2 \stopformula \stopplaceformula \page Text \startplaceformula \startformula[split=line,numberlocation=overlay] c^2 = a^2 + b^2 \stopformula \stopplaceformula \disabletrackers[math.showmargins.less] \stoptext %%% END

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\setupdelimitedtext and color parameter: only the second delimiter is colored
by garulfo＠azules.eu 27 Jan '25

27 Jan '25

Is this the expected behaviour? From an observation from https://wiki.contextgarden.net/Text_blocks/Environments/Quotes#Directly \starttext \quote{Some text} \setupdelimitedtext [quote] [color=red] \quote{Some text} \setupdelimitedtext [quote] [symcolor=red] \quote{Some text} \stoptext

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[ page setup ]
by vm 26 Jan '25

26 Jan '25

What would be the simple preferred way to define a document having not just odd and even pages but also alternating width is sets of two. e.g. two pages with width 118 mm followed by two pages of 178 mm followed by two pages with width 118 mm, ... all hints appreciated .Floris

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How to load external lua library
by krulis.tomas＠seznam.cz 25 Jan '25

25 Jan '25

Dear ConTeXt mailing list, I've been struggling with loading the sqlite external lua library. I tried the following: 1. Instaling the system package and running ConTeXt with the `--permitloadlib` option (I am running Manjaro, an arch-linux derivative: https://archlinux.org/packages/core/x86_64/sqlite/) 2. Installing the luarocks package (https://luarocks.org/modules/dougcurrie/lsqlite3) for the 5.1, 5.3 and 5.4 lua versions. I also tried to symlink the files in $HOME/.luarocks/lib/lua/{version}/lsqlite3.so to the project directory 3. I tried also setting the relevant lua paths with `eval $(luarocks path)`. The compilation always fails with an error that context can't locate the sqlite3 library. How can I load data from sqlite database during context compilation? As an MWE, I am adding the example in the documentation for the interaction with sqlite from the context garden (https://www.pragma-ade.nl/general/manuals/sql-mkiv.pdf) ```tex \starttext \startluacode require("util-sql") utilities.sql.setmethod("sqlite") require("util-sql-loggers") local loggers = utilities.sql.loggers local presets = { -- method = "sqlite", database = "loggertest", datatable = "loggers", id = "loggers", } os.remove("loggertest.db") -- start fresh local db = loggers.createdb(presets) loggers.save(db, { -- variant 1: data subtable type = "error", action = "process", data = { filename = "test-1", message = "whatever a" } } ) loggers.save(db, { -- variant 2: flat table type = "warning", action = "process", filename = "test-2", message = "whatever b" } ) local result = loggers.collect(db, { start = { day = 1, month = 1, year = 2016, }, stop = { day = 31, month = 12, year = 2116, }, limit = 1000000, -- type = "error", action = "process" }) context.starttabulate { "||||||" } for i=1,#result do local r = result[i] context.NC() context(r.time) context.NC() context(r.type) context.NC() context(r.action) if r.data then context.NC() context(r.data.filename) context.NC() context(r.data.message) else context.NC() context.NC() end context.NC() context.NR() end context.stoptabulate() -- local result = loggers.cleanup(db, { -- before = { -- day = 1, -- month = 1, -- year = 2117, -- }, -- }) \stopluacode \stoptext ``` I am sorry for the poor quality of the example, but I don't know how to add an attachment to a message in a mailing list. I have found a few references on the web and on this mailing list (https://mailman.ntg.nl/archives/list/ntg-context@ntg.nl/message/IDZBJQIXG3J…) but I wasn't able to figure out what I could be doing wrong. I found a reference that the issue might be a version mismatch, so I tested multiple lua versions. My project is about using multiple data sources in multiple formats and creating reports from them. I know I will definitely need to load YAML as well (with the `lyaml` luarocks package I guess). There's always the alternative of trying to use other programs to get the data, but I was wondering if I could leverage ConTeXt to do that directly. Thank you for any guidance on this, and I hope this message is not too long ...

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page number in margin
by Thomas Meyer 24 Jan '25

24 Jan '25

Hi folks, how is it possible to centre the page number vertically and horizontally in the outer text margin (even page on the left and odd page on the right)? Any help is welcome. Greetings Thomas

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Decreasing size of the section number according to its level
by garulfo＠azules.eu 24 Jan '25

24 Jan '25

Hi, in setuphead, I try to get a decreasing size of the section number according to its level with \defineconversion and \definestructureconversionset. It works as expected for the first levels, but between 6th and 7th, the variation doesn't occur. Any clue about what is happening ? For the MVE, I've added a visual check in dark red to show the discrepancy. \setuppapersize[A5] \define[1]\NivA{\tfc #1} \defineconversion[NA][\NivA] \define[1]\NivB{\tfb #1} \defineconversion[NB][\NivB] \define[1]\NivC{\tfa #1} \defineconversion[NC][\NivC] \define[1]\NivD{\tf #1} \defineconversion[ND][\NivD] \define[1]\NivE{\tfx #1} \defineconversion[ND][\NivE] \definestructureconversionset [mysectionnumbers] [N,N,NA,NB,NC,ND,NE] [N] \definestructureconversionset [mysectionnumbersforlist] [N] [N] \setupheads [sectionconversionset=mysectionnumbers] \setuplist [section, subsection, subsubsection, subsubsubsection, subsubsubsubsection] [numberconversionset=mysectionnumbersforlist] \starttext \placecontent \startsection [title={Section}] \startsubsection [title={SubSection}] \startsubsubsection [title={SubSubSection}] \startsubsubsubsection [title={SubSubSubSection}] \startsubsubsubsubsection [title={SubSubSubSubSection}] \stopsubsubsubsubsection \stopsubsubsubsection \stopsubsubsection \stopsubsection \stopsection \color[darkred]{{\tfc 1.}{\tfb 1.}{\tfa 1.}{\tf 1.}{\tfx 1}} \stoptext

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Install problem on aarch64
by Christian Prim 23 Jan '25

23 Jan '25

Hi everyone Fresh install today on a new computer. I get this error during the install process and after an attempted update: loading > ConTeXt Spacing Macros / Horizontal resolvers > lua > loading file '/home/christian/context/tex/texmf-context/tex/context/base/mkxl/spac-hor.lmt' succeeded tex error > tex error on line 34 in file spac-hor.mkxl: Undefined control sequence <line 3.34> \bitwiseflip \normalizeparmode \removetrailingspacesnormalizeparcode <empty file> The control sequence at the end of the top line of your error message was never \def'ed. You can just continue as I'll forget about whatever was undefined. resolvers | formats | resolvers | formats | binary path : /home/christian/context/tex/texmf-linux-aarch64/bin resolvers | formats | format path : /home/christian/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex resolvers | formats | luatex engine : luametatex resolvers | formats | lua startup file : /home/christian/context/tex/texmf-context/tex/context/base/mkxl/luat-cod.lmt resolvers | formats | context file : /home/christian/context/tex/texmf-context/tex/context/base/mkxl/cont-en.mkxl resolvers | formats | run time : 2.498 seconds resolvers | formats | return value : error resolvers | formats | system | total runtime: 2.760 seconds of 2.881 seconds I can't generate the needed cont-en format file for context to work. Is that a known problem? Am I missing something? I don't think it is related to the aarch64 architecture. But who knows... Thanks for your help! Kind regards Christian

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