ntg-context August 2022

ntg-context@ntg.nl

44 participants
80 discussions

Re: [NTG-context] accessing tex.sprint from pure Lua code.
by Hans Hagen 30 Aug '22

30 Aug '22

On 8/30/2022 8:02 PM, Hans van der Meer wrote: > In Terminal (say Unix window) calling > > lua some-file.lua > > and within that file code like > tex.sprint ... > token... > > Thus calling in the tex-library outside ConTeXt. no, tex is not a library .. but of course you can make a small tex file that wraps your lua and run that file with context keep in mind that tex is a ecosystem: fotns, languages etc 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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accessing tex.sprint from pure Lua code.
by Hans van der Meer 30 Aug '22

30 Aug '22

How can ik access the tex library in pure Lua for tex.sprint and token.setmacro? I guess something like require XYZ ? dr. Hans van der Meer

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Parallel texts: verse with blanks between stanzas via tabulate
by denis.maier＠unibe.ch 30 Aug '22

30 Aug '22

Hi, I need to typeset two poems side by side. Usually, I use the tabulate environment for typesetting parallel texts. However, for poems this does not quite work as tabulate does not seem to allow blanks between the stanzas. See MWE below. Am I missing someting? Is there a better way to achieve this? Best, Denis %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \startbuffer[lines] \startlines[after={\blank}] this is a poem with two stanzas \stoplines \stopbuffer \starttext With a blank between the stanzas: \getbuffer[lines] Without a blank between the stanzas: \starttabulate[|p|p|] \NC \getbuffer[lines] \NC \getbuffer[lines] \NC\NR \stoptabulate \stoptext %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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Merging two lua tables
by Aditya Mahajan 30 Aug '22

30 Aug '22

Hi, How do I merge two lua tables? I believe that table.merge or table.merged should do the trick, but I cannot figure out how to use them. ``` local t1 = { 1, 2 } local t2 = { 8, 9 } local m1 = {} table.merge(m1,t1, t2) table.print(m1) local m2 = table.merged(t1, t2) table.print(m2) ``` Processing the file with context filename shows that both m1 and m2 are {8, 9}. What am I missing. Thanks, Aditya

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SHA added to wiki
by Pablo Rodriguez 29 Aug '22

29 Aug '22

Dear list, I added https://contextgarden.net/SHA. I know that my composition is minimal and maybe the sample is poor. Just in case anyone might want to improve it. Best, Pablo

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SHA calculation
by Hans van der Meer 28 Aug '22

28 Aug '22

With \directlua{context(md5.hex([===[#1]===]))} I can calculate the MD5 checksum. I thought there was another call for the calculation of the SHA checksum, but I could not find it in the documentation or on the context garden. Where to look? dr. Hans van der Meer

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Textadept no longer supported?
by Jairo A. del Rio 28 Aug '22

28 Aug '22

Hi, list. Last time I installed my ConTeXt distribution from scratch, I've noticed Textadept files are no longer in the distribution. I've tried SciTE but it's broken in Ubuntu as code highlighting just doesn't work. Has something changed? Is it possible to get those files from an older version? Thanks in advance. Best regards, Jairo

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Understanding font errors
by denis.maier＠unibe.ch 26 Aug '22

26 Aug '22

Hi, I've just noticed I'm getting error messages related to fonts: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% fonts > checking > char G (U+00047) in font '' with id 0: missing fonts > checking > char r (U+00072) in font '' with id 0: missing fonts > checking > char a (U+00061) in font '' with id 0: missing fonts > checking > char f (U+00066) in font '' with id 0: missing fonts > checking > char i (U+00069) in font '' with id 0: missing fonts > checking > char k (U+0006B) in font '' with id 0: missing fonts > checking > char [space] in font '' with id 0: missing fonts > checking > char m (U+0006D) in font '' with id 0: missing fonts > checking > char t (U+00074) in font '' with id 0: missing fonts > checking > char L (U+0004C) in font '' with id 0: missing fonts > checking > char b (U+00062) in font '' with id 0: missing fonts > checking > char e (U+00065) in font '' with id 0: missing fonts > checking > char l (U+0006C) in font '' with id 0: missing %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% What exactly is that supposed to mean? There does not seem to be a problem in the resulting PDFs. What should I do to debug this? Best, Denis

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No error when loading a non-existent module
by Max Chernoff 26 Aug '22

26 Aug '22

Hi all, If you load a non-existent module, ConTeXt issues a minor warning, but otherwise proceeds as normal: MWE: \usemodule[doesnt-exist] \starttext Hello world! \stoptext I think that this behaviour should be changed so that a fatal error is issued when a loaded module cannot be found. Plain TeX, LaTeX, and OpTeX all throw an error whenever their versions of modules cannot be found, so ConTeXt is the odd one out here. There are 3 scenarios that I can think of for when you attempt to load a module, but it cannot be found: 1. A module provides some new command "\somecommand" In this case, loading the module will quietly fail, but an undefined control sequence error will be issued whenever you use "\somecommand". This disguises the root problem, which is that the module was never loaded, potentially confusing users. 2. A module changes the layout of a document In this case, the layout of the document would be unchanged by the module. If you're looking at every document, then this would be obvious; however, if you're using some batch processing system, you could unknowingly send out incorrectly-styled documents quite easily. 3. You load a module that provides some command, then never use it This is the only case where the new error would break any documents. However, this case should hopefully be pretty rare since it's pointless to load a module then never use any of its features. Making this change could potentially break some documents that currently work, but I think that this change is worth it, since I'd rather have something break loudly (throwing an error) rather than silently (producing a semi-corrupt document). Thanks, -- Max

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String substitution using regular expressions and backreferences
by Thangalin 26 Aug '22

26 Aug '22

Hi list, I'm looking to perform text replacements. \definereplacement[SubstPostmeridian][ match={[Pp].[Mm].]}, replace={\cap{pm}} ] The \replaceword command doesn't handle periods well. The translate module doesn't seem flexible enough to cover edge cases. Consider the following example document containing both sample inputs and sample outputs: \starttext {\bf Markdown Input} Our grandmother clock rang 11 p.m. and we fled. Our grandmother clock rang 11 p.m., so we fled. Our grandmother clock rang 11 p.m. We fled. \blank[big] {\bf \ConTeXt{} Output} Our grandmother clock rang 11 \cap{pm} and we fled. Our grandmother clock rang 11 \cap{pm}, so we fled. Our grandmother clock rang 11 \cap{pm}. We fled. \stoptext It would be most convenient to write: % Strip periods from p.m. \definereplacement[SubstPostmeridianLowercase][ match={[Pp].[Mm]. ([^:upper:])}, replace={\cap{pm} \1} ] % Preserve terminal period for p.m. (e.e. cummings notwithstanding) \definereplacement[SubstPostmeridianTerminal][ match={[Pp].[Mm]. ([:upper:])}, replace={\cap{pm}. \1} ] % Apply a macron for lowercase 'c' (McAnulty, McGenius, etc.) % Well, not quite a macron: https://tex.stackexchange.com/q/364024/2148 \definereplacement[SubstMac][ match={Mc([:upper:]\w)}, replace={M\macronbelow{c}\1} ] The \1 may be problematic. Other sigils include $1 and #1, which may also have issues. Thank you!

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ntg-context August 2022