ntg-context January 2017

ntg-context@ntg.nl

33 participants
61 discussions

Unicode text conversion
by Procházka Lukáš Ing. 16 Jun '17

16 Jun '17

Hello, does ConTeXt contain a built-in Lua conversion routine to convert text in UTF-16 (and others) to UTF-8 string? Something like: ---- \startluacode local str = "A unicode string" -- Or e.g. string loaded from a file str = convert(str, "utf16", "utf8") context(str) \stopuacode ---- TIA. Best regards, Lukas -- Ing. Lukáš Procházka | mailto:LPr@pontex.cz Pontex s. r. o. | mailto:pontex@pontex.cz | http://www.pontex.cz | IDDS:nrpt3sn Bezová 1658 147 14 Praha 4 Tel: +420 241 096 751 (+420 720 951 172) Fax: +420 244 461 038

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Opentype features and space after comma in math mode
by Jose Luis Arellano 03 Jun '17

03 Jun '17

Hello list, Two questions: 1) How can i enable opentype features (onum, lnum, tnum) in math mode? 2) How can i avoid the space after comma in math mode? I tried this without success: \definefontfeature[default][default][onum=yes,lnum=no,tnum=no] \definefontfeature[lnum][default][onum=yes,lnum=no,tnum=no,mode=base] \definefontfamily[mainface][serif][TeX Gyre Pagella] \definefontfamily[mainface][math][TeX Gyre Pagella Math][features=lnum] \setupbodyfont[mainface] \starttext 1,123\par \m{1,123}\par \stoptext Thanks in advance...

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mathmatrix and grid: followup
by Henri Menke 01 Jun '17

01 Jun '17

Dear list, some time ago I asked about the interplay of mathmatix with grid typesetting: https://mailman.ntg.nl/pipermail/ntg-context/2016/087018.html I noticed that when the grid is enabled, the height of a mathmatrix is rounded down which leaves less space above than below. In my opinion either the height should be rounded up or the depth rounded down here. In the original thread Wolfgang proposed using \setupformula[grid=tolerant] and adding a blank line before the formula (otherwise grid=tolerant is applied to the paragraph before). This workaround leads to the depth being rounded down in the example below which produces a more balanced output. Could this somehow be made the default behaviour or something? Currently it requires the user to notice that vertical spacing is off and correct it manually, including adding a blank line before the formula to prevent grid=tolerant being applied to the paragraph. Cheers, Henri --- \setuplayout[grid=yes] \showgrid \starttext \input knuth \startformula \vrule % make lineheight and depth visible \startmathmatrix \NC A \NR \NC B \NR \NC C \NR \stopmathmatrix \stopformula \input tufte \stoptext

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Bold italic font in Math (\definefallbackfamily)
by Jose Luis Arellano 14 May '17

14 May '17

Hello list, What is correct way to set bold italic font in math? \definefontfamily [Mainface] [rm] [Minion Pro] \definefallbackfamily [Mainface] [mm] [Minion Pro] [preset=math:lowercaseitalic] \definefontfamily [Mainface] [mm] [TeX Gyre Pagella Math] \setupbodyfont[Mainface] \starttext \startformula abc123 \stopformula \stoptext Thanks.

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Asymptote or Metapost and ConTeXt parameters.
by Jaroslav Hajtmar 19 Mar '17

19 Mar '17

Hello ConTeXtist, I saw the opportunity to insert an Asymptote picture into Context source code (due filter). For example here: https://mailman.ntg.nl/pipermail/ntg-context/2015/080581.html Is there a way to pass the ConTeXt parameter which influenced the creation of the Asymptote image? My point eg. the ability to define macros, which gave its parameters to Asymptote procedure or function and depending on these parameters, the image created by Asymptote looked differently. Before starting work on an illustrative example I am asking, whether it makes sense to deal with such a thing ... I suppose the impossibility of combining asymptote code and such Lua code (or not?). There is a similar possibility, at least in Metapost? For simpler pictures it would probably suffice .... Thanx Jaroslav Hajtmar

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Re: [NTG-context] Bug: \textext inside \*MPinclusions causes error
by Sergey Slyusarev 14 Feb '17

14 Feb '17

> the (subtle) difference between the two [*MPinclusions and **MPinitializations*] is not a bug but a feature If I understood correctly, *MPinitializations affects everything and can't be assigned to a specific instance (or can it?), in some cases (like mine) this difference is not so subtle. Look at the following example (not so minimal): \startMPinitializations picture p; p := image( draw fullsquare scaled 1cm; draw textext("1"); ); \stopMPinitializations \startMPinitializations picture s; s := image( draw (fullsquare rotated 45) scaled 1cm; draw textext("2"); ); \stopMPinitializations \defineMPinstance[foo][initializations=yes] \startMPcode{foo} picture q; q := image( draw fullcircle scaled 1cm; draw textext("3"); ); draw q; \stopMPcode \startMPcode{foo} draw p; draw q shifted (2cm, 0); draw s shifted (4cm, 0); \stopMPcode \defineMPinstance[bar][initializations=yes] \startMPcode{bar} picture r; r := image( draw fullcircle scaled 1cm; draw textext("4"); ); draw r; \stopMPcode \startMPcode{bar} draw p; draw r shifted (2cm, 0); draw s shifted (4cm, 0); \stopMPcode First, it shows why *MPinitializations can't replace *MPinclusions for me (it affects all instances), and second, it silently produces produces some really unexpected results: It looks like it should produce (by line) A circle with "3" inside (yes) A square with "1" inside (yes); A circle with "3" inside again (no, instead it produces circle with "2" inside); A rhombus with "2" inside (no, instead it produces a rhombus with "1") and so on. (tested on http://live.contextgarden.net/) In fact, I failed to declare picture variable inside with text inside one *MPcode environment and pass it to another safely (text either disappears or changes to other text, and this time ConTeXt returns no error), that surely is a bug? Sergey

2 5

align text and formula
by Jan Willem Flamma 09 Feb '17

09 Feb '17

Dear list, I would like to include text on the same line as a formula. The text needs to be left-aligned and the formula needs to be mid-aligned (as per normal). I’ve tried various solutions from the mathalign MyWay but have not succeeded to get the desired result sofar. Below a M-Not-WE. Clearly, the formula is not positioned correctly yet. Who can help me out? Regards, Jan Willem \starttext \setupformulas[align=flushleft] \startformula \startalign[n=2,align={left,middle}] \NC \text{Text1} \NC E = mc^2 \NR \NC \text{Text2} \NC E = mc^2 \NR \stopalign \stopformula \stoptext

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[Far out subproject proposal] ---Have ConTeXt generate html math inaddition to pdf/dvi ?
by Federer Fanatic 02 Feb '17

02 Feb '17

Hi, I was wondering if: -------------------------------- Basically have complete mathml markup or some other kind of html math output that is completely capable of doing what is now done for pdf output. This would elminate the need for the clumsy workarounds that mathjax, for example, provides---there appears to be no easy way to convert arbitarilly/personally written latex packages/classes into something that mathjax can understand. Obviously the original latex code could still remain in the resulting html/mathhtml output so that people would still have access to the "original" source code. One of my motivations is to allow for google translate to work on html math documents... it WORKS provided you add 'notranslate' to the spans: <span class="math inline">, <class="math display">latex math commands/span> etc environments. However LaTeX commands that mathjax is not familiar with are not rendered.... I realize this may be a better question on mathjax but I regard that project, while laudable, wrong headed as the real problem should be solved by a proper TeX-like engine like ConTeXt can solve this problem(s)? -------------------------------------------------------------- Roger Federer Fanatic Extraordinaire :-)

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\startlines not working in footnotes
by Alan Bowen 31 Jan '17

31 Jan '17

I am trying to set some poetry in a footnote and have encountered a problem. \starttext Here is a footnote. \footnote{Some text: \startlines a b c d \stoplines And some more text.} \stoptext produces a b c d (a single line). Is this a wee bug or have I missed something? I am using the latest minimals. Alan

2 2

module simplefonts
by John Culleton 31 Jan '17

31 Jan '17

In a 2013 book this module is called somewhere but unsuccessfully. Does any one remember it? Is it still relevant? -- John Culleton Wexfordpress Book design and indexing.

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ntg-context January 2017