September 2018 - ntg-context - NTG Mailing Lists

Using the source han sans fonts fails
by Ulrike Fischer 21 Sep '18

21 Sep '18

Because of a question on tex.sx I tried to use the source han sans fonts. I installed (in windows 10) the fonts from this zip-file: https://github.com/adobe-fonts/source-han-sans/blob/release/OTF/SourceHanSa… Trying to use them with latex/luaotfload failed with a memory exhausted error while trying to write the lua-file. In context \starttext \font\test={name:sourcehansans} \test abc \stoptext gave the error: fonts > otf loading > loading 'c:/windows/fonts/SourceHanSans-Regular.otf', hash 'sourcehansans-regular' otf reader > loading of table 'vorg' skipped otf reader > invalid index in single format 1: 65353 -> 67212 (max 65535) otf reader > rule 1 in gsub lookup 's_s_5' has empty lookups fonts > otf loading > loading failed due to read error fonts > defining > forced type 'otf' of 'c:/windows/fonts/SourceHanSans-Regular' not found fonts > defining > font with asked name 'c:/windows/fonts/SourceHanSans-Regular' is not found using lookup 'name' fonts > defining > unknown font 'c:/windows/fonts/SourceHanSans-Regular', loading aborted xelatex had no problems to use the font. Is this an error in the font or in the fontloader? -- Ulrike Fischer http://www.troubleshooting-tex.de/

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page interaction in contents list entry
by Henning Hraban Ramm 20 Sep '18

20 Sep '18

Dear wizards, in a list command (i.e. \setuplist[command=\MyCmd]) I use \currentlistentrypagenumber to show the page number. Now I’d like to make this a link, like in a normal ToC. I didn’t find a suitable command. Is there one? Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD

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vim \page highlight
by Damien Thiriet 20 Sep '18

20 Sep '18

Hello list, Do you know what should I add to my ftplugin/context.vim to have \page highlighted when using ViM ? I tried to understand context.vim color syntax but this is magic to me (mapping is ok, but offtopic). Thanks, Damien Thiriet

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Re: [NTG-context] Variable instance identifiers exhausted
by Hans Hagen 19 Sep '18

19 Sep '18

On 9/19/2018 10:45 PM, Alan Braslau wrote: > Metapost does not have a very efficient mechanism for keeping objects in memory and does not have a very efficient or real array mechanism, rather it uses hashed lists. fwiw, keeping objects as such in memory is quite ok, hashing is also ok, but indeed arrays are not really arrays but linked lists into the hash (which actually you can speed up a lot) so, here is a teaser for Alan (no lua magic here, just knowledge of how mp hashes): \dontleavehmode \testfeatureonce{1}{ \startMPcode numeric foo[]; def set_foo(expr c, s) = foo[c]:= s ; enddef ; def get_foo(expr c) = foo[c] enddef ; for i=1 upto 10000 : set_foo(i,i) ; endfor ; draw textext("set one dimensional"); \stopMPcode } \elapsedtime \blank \dontleavehmode \testfeatureonce{1}{ \startMPcode numeric n ; for i=1 upto 10000 : n := get_foo(i) ; endfor ; draw textext("get one dimensional"); \stopMPcode } \elapsedtime \blank \dontleavehmode \testfeatureonce{1}{ \startMPcode numeric foo[][][][]; def set_foo(expr c, s) = foo[c div 1000][c div 100][c div 10][c] := s ; enddef ; def get_foo(expr c) = foo[c div 1000][c div 100][c div 10][c] enddef ; for i=1 upto 10000 : set_foo(i,i) ; endfor ; numeric n ; for i=1 upto 10000 : n := get_foo(i) ; endfor ; draw textext("set four dimensional" ); \stopMPcode } \elapsedtime \blank \dontleavehmode \testfeatureonce{1}{ \startMPcode numeric n ; for i=1 upto 10000 : n := get_foo(i) ; endfor ; draw textext("get four dimensional"); \stopMPcode } \elapsedtime \blank 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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Variable instance identifiers exhausted
by Fabrice L 19 Sep '18

19 Sep '18

Dear List, I’m running into a problem in Metapost (using Context of course!) creating (I think) too many objects; I got this error message: variable instance identifiers exhausted I have tried without success to find information and a solution. Does somebody has a hint to solve this ? Thanks, Fabrice.

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font in \setuplanguage
by Pablo Rodriguez 19 Sep '18

19 Sep '18

Dear list, I have the following sample: \mainlanguage[es] \setuplanguage[agr][font=\grcface] \definefontfamily[grcface][rm][DejaVu Sans] \definefontfamily[mainface][rm][DejaVu Serif] \setupbodyfont[mainface] \starttext \startTEXpage[offset=1em] a {\agr β} \stopTEXpage \stoptext I cannot get the Greek fragment using another font. Is this a bug or am I missing something? Many thanks for your help, Pablo -- http://www.ousia.tk

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MetaFun: How to draw bent paths?
by Henri Menke 19 Sep '18

19 Sep '18

Dear list, I want to draw paths between points which are bent by a certain angle. The code in the MWE below works well but I was thinking that the expert here can surely improve it and suggest a nicer syntax. Cheers, Henri --- \startMPpage vardef bend(expr a,b,phi) = a{dir(angle(b-a)+phi)} .. {dir(angle(a-b)+180-phi)}b enddef ; z1 = (-.5cm,1cm) ; z2 = (1cm,3cm) ; for phi = 0 step 5 until 360: draw bend(z1,z2,phi) withcolor (phi/360)[red,blue] ; endfor ; \stopMPpage Possible use case: \startMPpage[offset=1cm] vardef bend(expr a,b,phi) = a{dir(angle(b-a)+phi)} .. {dir(angle(a-b)+180-phi)}b enddef ; z1 = (-.5cm,1cm) ; z2 = (1cm,3cm) ; draw z1 -- z2 ; dotlabel.lft("$-$", z1) ; dotlabel.lft("$+$", z2) ; path p; p := bend(z1,z2,-30) ; drawdblarrow p withcolor blue ; label.lrt(textext("$\Delta$"),point .5 along p) withcolor blue ; \stopMPpage

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xml in lua advice ?
by Taco Hoekwater 19 Sep '18

19 Sep '18

Hi, Is there a more elegant way to feed an xml tree into a context() command that what I have below? \startluacode function xml.functions.heading(t) context.section("{") lxml.flush(t) context("}") end \stopluacode The subtree in ’t’ could have embedded xml tags that should be processed, so just stripping it clean will not do. (this is not about \section as such, I just needed an example. \startsection would be more modern, but it would not help fix the issue ) Thanks for any help, Taco

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xmlstrippednolines
by Hans van der Meer 18 Sep '18

18 Sep '18

This completely escapes me: \xmlstrippednolines behaves differently for: (1) no embedded nodes - just the node content (2) embedded nodes - outer node encloses node content See the minimal example. For me this works out a disaster, because in the second case the outer node is added, throwing my program completely off track. Questions: Is this the defined behaviour? Then what other means can be used to get the node content and nothing but the node content in both cases? Why does \xmlstrippednolines behaves in this manner? dr. Hans van der Meer

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reference manual
by Hans van der Meer 17 Sep '18

17 Sep '18

My most recent version of the "ConTeXt reference manual” is Hans Hagen, Taco Hoekwater September 27, 2013. Is there a newer edition available? I could not find one in the (beta) distribution in texmf-context/doc. dr. Hans van der Meer

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