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Font substitution for extensible symbols
by Yaroslav Beltukov 02 Feb '23

02 Feb '23

Good day everyone, I'm trying to replace the math radical symbol (with all its variants) in one font with another one. Some fonts have too few radical symbols of different sizes, which results in enormous spacing in radicals. However, there is a bug in the new font replacement mechanism. Here is MWE: % 0x221A is the radical symbol \definefallbackfamily [MainFace] [mm] [TeX Gyre Pagella Math] [force=yes, range=0x221A] \definefontfamily [MainFace] [tf] [Cambria] % or [XITS] \definefontfamily [MainFace] [mm] [Cambria Math] % or [XITS Math] \setupbodyfont [MainFace] \starttext \startformula \sqrt{\frac{1}{2}}\dorecurse{15}{+\sqrt{\blackrule[width=10pt,height=#1pt,depth=#1pt,color=gray]}} \stopformula \startformula \sqrt{\blackrule[width=10pt,height=100pt,depth=100pt,color=gray]} \stopformula \stoptext It works in MKIV but it gives the following error in the latest LMTX: ...mkxl/math-vfu.lmt:675: attempt to get length of a nil value (global 'hp') It is caused by the following loop in math-vfu.lmt: local pv = olddata.parts if pv then pv = fastcopy(pv) newdata.parts = pv for i=1,#hp do local pvi = pv[i] ... One can see that #hp should be #pv. After this correction, the error disappears and we get different sizes of radicals from the new font. However, now the extended version of the radical does not work. Actually, this loop is devoted to copying the parts of the extended symbol, and it does not work as expected. Obviously, there is something deeper than the correction of the typo. The same behaviour is for other extensible symbols (e.g. parentheses). I hope this issue can be resolved. A more deeper understanding is required here. Best regards, Yaroslav P.S. sometimes I get the following output. Maybe it is related: otf reader > cff > unknown local call ?, case 1 : [] n=0

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list not following "focus=standard"?
by Pablo Rodriguez 31 Jan '23

31 Jan '23

Dear list, I have the following sample: \setupinteraction[state=start, focus=standard] \starttext \completecontent \dorecurse{25} {\section{Section} a\footnote{b}} \stoptext Using current latest (from 2023.01.26 18:34), destinations for TOC are pages (/D [ 7 0 R /Fit ]) and destinations for footnotes are named destinations (/D [ 1 0 R /XYZ 61.900625 141.0443 null ]). Compare https://pdf.ousia.tk/lst-fnt.pdf#_3 with any link from the TOC. I‘m afraid this might be a regression from a recently fixed issue. Could anyone confirm this issue? Many thanks for your help, Pablo

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Wrong prefix in cross references to formulas in external document
by Yaroslav Beltukov 31 Jan '23

31 Jan '23

Dear Hans and all contributors, I really appreciate ConTeXt for the right way to obtain high quality documents. I'm a theoretical physicist and I'm going to write a book. I think ConTeXt is the right choice to work with a number of formulas, figures and cross-references. The visual quality of formulas is better than in regular LaTeX. The new feature with formula autosplitting looks also very promising. For me it is important to obtain the high quality without a lot of manual tweaks of each formula for each given document format and figure placement. However, I have found a problem with references if I compile one component only. The references to formulas in other components have wrong prefixes, e.g. (2.1) instead of (3.1). Needless to say, the right formula references are very important. I started looking into this issue. The references to other components are taken from the whole product as from an external document. It turned out that this is a general problem with references with prefixes to external documents. The prefix is stored in a tuc file as a reference to a section as a sequential number of the header in the document. As a result, the prefix from the external document is calculated using the structure of the current document. Here is the MWE, which consists of two files: foo.tex: \defineenumeration[remark][prefix=yes, prefixsegments=chapter:section] \starttext Equations: \in[eq1], \in[eq2], \in[eq3], \in[eq4] Sections: \in[sec1], \in[sec2], \in[sec3], \in[sec4] Chapters: \in[chap1], \in[chap2], \in[chap3], \in[chap4] Remarks: \in[remark1], \in[remark2] \startbodymatter \chapter[chap1]{Chapter} \placeformula[eq1]\startformula x = y\stopformula \chapter[chap2]{Chapter} \section[sec1]{Section} \section[sec2]{Section} \placeformula[eq1]\startformula x = y\stopformula \placeformula[eq2]\startformula x = y\stopformula \stopbodymatter \startappendices \chapter[chap3]{Chapter} \section[sec3]{Section} \placeformula[eq3]\startformula x = y\stopformula \section[sec4]{Section} \startremark[remark1]\stopremark \placeformula[eq4]\startformula x = y\stopformula \startremark[remark2]\stopremark \chapter[chap4]{Chapter} \stopappendices \stoptext bar.tex: \starttext Equations: \in[foo::eq1], \in[foo::eq2], \in[foo::eq3], \in[foo::eq4] Sections: \in[foo::sec1], \in[foo::sec2], \in[foo::sec3], \in[foo::sec4] Chapters: \in[foo::chap1], \in[foo::chap2], \in[foo::chap3], \in[foo::chap4] Remarks: \in[foo::remark1], \in[foo::remark2] % any chapters and sections here \stoptext It is expected to have the same first page on these documents: Equations: 1.1, 2.2, A.1, A.2 Sections: 2.1, 2.2, A.1, A.2 Chapters: 1, 2, A, B Remarks: A.2.1, A.2.2 However, the bar.tex produces wrong prefixes to formulas and remarks. The output depends on the document structure of bar.tex, not foo.tex. I started looking into the source code. Thanks to lua, it is not a big deal to track the problem. The prefixdata is complemented by the sectiondata after the loading the tuc file. So, the question is: is it possible to store the full prefixdata with all necessary prefix numbers in the tuc file? Here is my proposal to change the source code: --- strc-lst-old.lmt 2023-01-29 11:30:15.610309948 +0300 +++ strc-lst.lmt 2023-01-29 12:10:08.864228923 +0300 @@ -266,6 +266,16 @@ if r and not r.section then r.section = structures.sections.currentid() end + -- store sectiondata in prefixdata (necessary for external files) + if t.prefixdata and r.section then + local sectiondata = structures.sections.collected[r.section] + if sectiondata then + for k, v in next, sectiondata do + t.prefixdata[k] = v + end + end + end + -- local b = r and t.block if r and not b then local s = r.section --- strc-ref-old.lmt 2023-01-29 11:30:15.823643904 +0300 +++ strc-ref.lmt 2023-01-29 12:07:45.697109862 +0300 @@ -2318,7 +2318,17 @@ if data then numberdata = lists.reordered(data) -- data.numberdata if numberdata then - helpers.prefix(data,prefixspec) + -- helpers.prefix(data,prefixspec) + -- use the actual numbers from prefixdata + local prefixdata = data.prefixdata + if prefixdata then + -- adapted from helpers.prefix (not sure) + if (prefixspec and prefixspec == no) or prefixdata.prefix == no then + prefixdata = false + end + sections.typesetnumber(prefixdata,"prefix", prefixspec or false, prefixdata) + end + -- sections.typesetnumber(numberdata,"number",numberspec,numberdata) else local useddata = data.useddata After this small change, all the references are correct. However, I'm quite new to ConTeXt, so maybe here are some caveats. It would be great to fix the references to formulas, especially for the forthcoming document about maths. Best regards, Yaroslav Beltukov

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Best way to access casul fonts
by Mattias Märka 30 Jan '23

30 Jan '23

Hi, I'm trying to access Lucida Casual. I see in type-imp-lucida-typeone.mkiv that there is, indeed, a typescript for it, but I can't figure out how to switch to it. That is, I want to make some text be Lucida Casual. I gather from a previous thread that I should be using \definefontstyle, but I don't know how to go about this. Currently I'm just defining a new typescript and making Lucida Casual a synonym for Serif and then using \switchtobodyfont --- but this feel silly. I searched the wiki and skimmed the reference manual, but to no avail. Perhaps I don't know what I should be looking for. Any help would be appreciated. What's the easiest way to access a casual font? What's the cleanest way? Thanks, Mattias Märka

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layout for marked pages?
by Pablo Rodriguez 30 Jan '23

30 Jan '23

Dear list, I have the following sample: \showframe \setuplayout[width=middle] \definelayout[odd][reset] \definelayout[even][reset] \doiftext{\markedpages[zapf]} {\doloopoverlist{\markedpages[zapf]} {\definelayout[\recursestring][page]}} \starttext \dorecurse{50}{\input{knuth}\par} \page\startmarkpages[zapf] \dorecurse{50}{\input{zapf}\par} \stopmarkpages\page \dorecurse{50}{\input{knuth}\par} \stoptext I wanted to have page layout in pages marked with zapf. I thought \markedpages[zapf] was the way to go, but I only get text after marked pages, not before them. Which is the right approach to have marked pages with a different layout? I would be happy to update https://wiki.contextgarden.net/Page_Layout#Multiple_layouts. Many thanks for your help, Pablo

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Subject: Leading spaces verbatim
by Kalouguine Andre 30 Jan '23

30 Jan '23

Good day to everyone, I'm trying to make a verbatim block of text with copiable leading spaces so that students can just copy my Python code snippets into their IDE. I believe the question has been asked before (though I confess I can't find the right search terms to find the answer again). I get that PDFs are not the optimal way to give code to students (which is why for longer snippets, I just give them the files or I attach them into the PDF), but for short snippets it would be so much simpler... I recently stumbled onto this article: https://www.overleaf.com/latex/examples/using-luatex-to-convert-interword-g… wherein the author replaces the TeX glue with spaces and kerning. I was wondering whether the same idea could be applied within the typing environment but making a primitive verbatim environment using \obeylines and \obeyspaces did not result in copiable spaces. Unfortunately, whilst I have some concepts of how luatex works on the input file, the step wherein a pdf is formed is fairly misterious to me, meaning I can't really understand the Lua code from said article (https://gist.github.com/Semptum/076cca71bc251ebe19ff96c5effca3cb) Hence, my three questions: - Is it even realistic to make such a typing environment? - What would be the best path to do so? - Can someone recommend some reading material specifically about this kind of typographical adjustments using LuaTex? Stuff like adjusting the glyphs's position, replacing characters with combined characters etc... Sorry if that's a bit vague, as you can see from the rest of the message, I never really went too deep into the later stages of the TeX pipeline. Best regards, Andre

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how to change metadata halfway through document
by jbf 30 Jan '23

30 Jan '23

Am trying to understand how best to change the title metadata in headertext halfway through a document that has two parts: Constitutions and Regulations. My first attempt (did not work) \startsetups[headertext] \startdocument [metadata:title={Regulations}] \stopsetups \setupheadertexts [ ] [{\getmarking[chapter]\hskip1em \pagenumber}] [{\pagenumber \hskip1em \setup{headertext}}] [ ] My second attempt (quite crass, but it works!!) was to create a second \startdocument within the main \startdocument (obviously closing it towards the end but before the main \stopdocument), this time with [metadata:title={Regulations}] instead of the original [metadata:title={Constitutions}]. However, I have a strong feeling this is not a very elegant solution! Thoughts? Julian

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How to create multi-line headers and footers?
by Joel 29 Jan '23

29 Jan '23

I am creating a template for a 1-page newsletter. At the top of every page is a huge title, below which is a block with a brief introduction to the newsletter. The body is just 200-300 words each issue--I edit it such that all of the content fits on just one-side, one page. Finally, in the footer, is contact information and some other closing details. ======TITLE <-- big title ............ <-- introduction paragraph ............ ====== -------------------- <-- body text ----------======............ <-- message in footer ====== I tried placing that all into a macro called "\introduction" then calling with this \setupheadertexts[\introduction] It seems when placing the macro inside \setupheadertexts, the text is reduced to a single line. Any code involving \frames{} doesn't seem to work normally. Its all compressed to a single line, then centered. How can I put a mult-line frame or multi-line text in the headers and footers? --Joel

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Can ConTeXt print specific paragraph and sentences from an input file?
by Joel 29 Jan '23

29 Jan '23

Assuming I have an input file with an essay: \starttext \input essay \stoptext Is there any command to tell ConTeXt to print a specific sentence, e.g. the first sentence from paragraph 2, or the last sentence from paragraph 1, etc? --Joel

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notes by paragraph
by jbf 28 Jan '23

28 Jan '23

Re my earlier question on footnotes by defined paragraph: \start...stoplocalfootnotes and \placelocalfootnotes largely solves the issue (had forgotten that option), but I am still getting the footnotes repeated at the bottom of the page. I am obviously missing a setting. There are parts of this text that do require the usual footnotes at the bottom, so I would not want to turn off this option permanently. I have tried \setupnotation[footnote][display=no] but that is not working. Julian

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