ntg-context August 2020

ntg-context@ntg.nl

36 participants
98 discussions

lmtx update
by Hans Hagen 03 Aug '20

03 Aug '20

Hi, Sorry for the long mail ... One of the changes in lmtx is that we freeze the properties that determine the paragraph shape as well as breaking into lines in such a way that we have predictable behaviour. As a side effect it can be that existing code (lmtx only) will behave differently (will be fixed when we notice) but also that some low level user tweaking can not work, i.e. they are just ignored, but only when they happen mid paragraph which actually is always debatable anyway. Now, if for some reasom you get unexpected results and can't wait for a fix, you can do this: \forgetparagraphfreezing : disables \setparagraphfreezing : enables (default) Of course it might have other side effects once in lmtx we everywhere expect freezing to be enabled. You can take a snapshot with: \freezeparagraphproperties : snapshot relevant parameters \defrostparagraphproperties : resets snapshot More efficient is snapshotting a subcategory: \updateparagraphproperties : all \updateparagraphpenalties : only penalties \updateparagraphdemerits : other than penalties \updateparagraphshapes : hangindent etc Don't use the low level commands that they use because we take plenty of time to experiment at that level and interfaces might evolve, for instance: \frozen\hangindent 30pt \frozen\hangafter 2 is valid and will likely stay. We're talking of a conceptually rather different approach. Internally the engine is still doing the same things but we can control it a bit differently. Due to the way ConTeXt is set up, we can make such a paradigm shift without too much troubles. I'll wrap up more details in an article later. Other work in progress is: better columns in itemize, esp proper footnote support (not that I ever need that but I know users do so ...), experiments work ok, but I need to check spacing. In general, footnotes (will) behave a bit better, especially those used nested in other mechanisms. A side effect of more control is that we can do other tricks too and we're playing with it (kind of fun). More work in progress concerns paragraph wrappers and that will result in a rewrite of some existing mechanism (generic subsystems with instances), but that might as well go unnoticed. To give an idea of possibilities, here is an example: \definedescription[whatever][alternative=right:bottom] \startwhatever{just a small\\example} \input ward \stopwhatever No one ever requested it so see it an a quick and dirty example but don't hesitate to ask for more anyway (we like an occasional challenge). Anyway, it might take some weeks / iterations before all this settles down and now you can't say that we didn't warn you. So far, 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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Notation of the first derivative in mathematical mode (lmtx)
by Fabrice Couvreur 03 Aug '20

03 Aug '20

Hello, I replaced the context engine with the lmtx engine but I find that the derivative symbol is too high regardless of the font used. I mainly use modern and pagella because I type many texts using mathematics: can we correct this problem, Thanks for your help. Fabrice \starttext \startitemize[n] \startitem \math{f'(x)=x²+4x+4} \stopitem \startitem \math{f''(x)=2x+4} \stopitem \stopitemize \stoptext

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Re: [NTG-context] limit of index entries?
by Hans Hagen 02 Aug '20

02 Aug '20

On 8/1/2020 6:08 PM, Henning Hraban Ramm wrote: > > >> Am 01.08.2020 um 14:10 schrieb Hans Hagen <j.hagen(a)xs4all.nl>: >> >> On 8/1/2020 1:54 PM, Henning Hraban Ramm wrote: >>> Hi, >>> my aforementioned person index has more than 600 entries. If I get over ~500, ConTeXt (MkIV, several versions) breaks with >>> ! error (push_node): stack overflow >>> mtx-context | fatal error: return code: 256 >>> Is there a hard limit? Can I change it? >> it might relate to protrusion (which needs to enter nested boxes to determine an edge) but how that then can relate to the number of entries puzzles me, unless we pop too less ... in which case i need to trace (with a mwe) > > I can’t reproduce it with a simple example like > > \setupalign[hanging] > > \starttext > > \placeregister[index][criterium=all] > > \dorecurse{10000}{\par\strut\index{Test\recurselevel}} > > \stoptext > > > \recurselevel is empty in that context, \expanded didn’t help, but I guess we need different entries. > > > Find attached the actual data, reduced to the minimum setup – the problem is indeed \setupalign[hanging]. > > I guess I can omit "hanging" for the index, but of course if would be nice if it would work. it has to do with how you do that index: - you do a lot of \index but you do that in vmode - do, they get collected for the next paragraph - that is done in a robust way which involves packing - eventually you flush with a \strut - so we get deeply nested boxes - and that means trouble for protrusion pre-analysis now, I can try to avoid it but we then can have side effects but we'll see can you try to avoid collecting: \leavevmode \index{...}% make sure no spaces get introduced 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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cannot reload font index after luametatex update
by kaddour kardio 02 Aug '20

02 Aug '20

Hi, i am running the latest luametatex 2.07.2 from [aur] repos in my archlinux machine, i got this error when trying to update my font lists (lmtx) ➜ ~ mtxrun --script fonts --reload mtxrun | unknown script 'fonts.lua' or 'mtx-fonts.lua' is it a feature? thanks -- Dr YAHYAOUI Mohamed Kaddour, cardiologue .

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consistent index entries
by Henning Hraban Ramm 01 Aug '20

01 Aug '20

Hi, besides the CG journal I’m working on a scientific biography with huge person and locality indexes (named Person and Locality for the examples). In many cases, the author wants additional information in the index, e.g. \Locality{Altona (Hamburg)} \Locallity{Breslau (pol. Wrocław)} or \Person{Arends, Katharina (née Schoemaker)} \Person{Wilhelm II. (Kaiser)} Now, I need that consistent and I don’t want to type these complicated entries every time. I’m looking for a good way to handle this – maybe a lookup table in Lua, so that \LookupPerson{Willy II} would call a Lua function that returns \Person{Wilhelm II. (Kaiser)} ? Or is there already something in place that I overlooked, like \OverwriteIndexEntry{Hraban}{Ramm, Henning Hraban} ? Hraban

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handle_error_hook in LuaMetaTeX
by Marcel Fabian Krüger 01 Aug '20

01 Aug '20

Hi, thanks for handling f file consition in LuaMetaTeX. While playing with that, I encountered a potential bug in the latest LuaMetaTeX version: If handle_error_hook is executed and returns any number, LuaMetaTeX segfaults. (I'm pretty sure that this still worked with the previous version) Minimal ConTeXt example: \enabledirectives[system.quitonerror=false] \directlua{ print(callbacks.register('handle_error_hook', function(...) return 3 end)) } \undefined % Trigger an error \starttext \stoptext This triggers [...] system > ConTeXt ver: 2020.07.31 10:20 LMTX fmt: 2020.7.31 int: english/english [...] tex error > tex error on line 7 in file ./test_empty_input.tex: ! Undefined control sequence l.7 \undefined [...] 9 \stoptext segmentation fault (core dumped) /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex cont-yes.mkiv valgrind suggests that this is caused by an attempt to access a null pointer: ==382632== Invalid write of size 4 ==382632== at 0x1A581F: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x1A662F: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x14BAA8: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x1DA50E: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x1DA802: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x15F956: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x156E2E: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x121E97: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x4A16001: (below main) (in /usr/lib/libc-2.31.so) ==382632== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==382632== ==382632== ==382632== Process terminating with default action of signal 11 (SIGSEGV): dumping core ==382632== Access not within mapped region at address 0x0 ==382632== at 0x1A581F: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x1A662F: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x14BAA8: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x1DA50E: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x1DA802: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x15F956: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x156E2E: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x121E97: ??? (in /home/marcel/lmtx-install/tex/texmf-linux-64/bin/luametatex) ==382632== by 0x4A16001: (below main) (in /usr/lib/libc-2.31.so) That me know if you are interested in the coredump. Best regards, Marcel

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limit of index entries?
by Henning Hraban Ramm 01 Aug '20

01 Aug '20

Hi, my aforementioned person index has more than 600 entries. If I get over ~500, ConTeXt (MkIV, several versions) breaks with ! error (push_node): stack overflow mtx-context | fatal error: return code: 256 Is there a hard limit? Can I change it? Hraban

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Alphabet & color
by Marcus Vinicius Mesquita 01 Aug '20

01 Aug '20

Dear list I need to typeset a book for kids wich contains texts where each letter is assigned a fixed color, for example: A - - > red; B - - > blue; ... Z - - > green. What would be the best way to do this? TIA. Marcus Vinicius

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ntg-context August 2020