- ntg-context - NTG Mailing Lists

Change of nuts.dimensions function ?
by Joseph Canedo 16 Feb '18

16 Feb '18

Hello all, It seems that with latest ConTeXt beta (with luatex 1.07.0) it seems that nuts.dimensions function behaviour has changed. Simple MWE shows the change. Which function should be used now to get natural width of a range [n, t[ of nodes please? Thanks a lot Regards Joseph Canedo \startluacode local nuts = nodes.nuts local getdimensions = nuts.dimensions local tonut = nuts.tonut local tonode = nuts.tonode local tasks = nodes.tasks function handler(head) head = tonut(head) print('Width=' .. getdimensions(head, head)) // used to be 0 (as per luatex doc), now it’s most likely the natural width of the box. return tonode(head) end tasks.appendaction("processors", "after", "handler") tasks.enableaction("processors", "handler") \stopluacode \starttext Foo. \stoptext

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italic correction after math
by Ulrike Fischer 14 Feb '18

14 Feb '18

In the following example the calligraphic P bumps into the following x. After some searching in the archive I found some discussions from 2012 and had the impression that this either shouldn't happen or that the behaviour could at least could be changed with \setupmathematics[italics=n]. But in my examples \setupmathematics[italics=...] doesn't do anything. Every line looks looks identical to me (the second example is from the header of xits-math.lfg). Is this behaviour expected? If yes, what should one do to get an italic correction is such cases? \setupbodyfont[xits] \starttext x${\cal P}$x\par \setupmathematics[italics=1]x${\cal P}$x\par \setupmathematics[italics=2]x${\cal P}$x\par \setupmathematics[italics=3]x${\cal P}$x\par \setupmathematics[italics=4]x${\cal P}$x\par \stoptext \setupbodyfont[xits] \starttext test $a;b;a; b; f;$ test\par \setupmathematics[italics=1] test $a;b;a; b; f;$ test\par %fontitalics \setupmathematics[italics=2] test $a;b;a; b; f;$ test\par % fontdata \setupmathematics[italics=3] test $a;b;a; b; f;$ test\par % quad based \setupmathematics[italics=4] test $a;b;a; b; f;$ test\par % combination of 1 and 3 \stoptext (xetex inserts a kern of 2.45pt after the math in latex). -- Ulrike Fischer http://www.troubleshooting-tex.de/

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Paasing two arguments from Lua to Context
by Otared Kavian 13 Feb '18

13 Feb '18

Hi all, After Hans showed me an example of using Lua code in ConTeXt, I am learning this stuff in the manual cld-mkiv.pdf, which is in [ConTeXt-StandAlone]/tex/texmf-context/doc/context/documents/general/manuals/cld-mkiv.pdf From that manual I understand that if a macro command \mycommand is defined so that it takes one argument, such as in \mycommand{Myargument} then in a Lua code one may use it as in context.mycommand({"Myargument"}) However, if \mycommand takes two arguments (or more), it is not clear to me how these arguments can be passed from Lua to Context. Indeed there is always the possibility to say (for a macro taking two arguments) context("\\mycommand{FirstArgument}{SecondArgument}") as in the example below with \goto. But I don’t know how to use context.goto… The reason for which I need such a construction is that I want to add some links and buttons in my document which point to locations which are determined inside the Lua code. Does any one have an idea to do this? Thanks in advance and best regards: OK %% begin test-lua-reference.tex \setupinteraction[state=start] \starttext \startchapter[title={Knuth},reference={ch:knuth}] % a simple way of adding a link to some part of the document... Read the following and also what \goto{Ward says}[ch:ward].\index{Ward} See also the \goto{Index}[ref:index]. \input knuth.tex \stopchapter \startchapter[title={Ward},reference={ch:ward}] % a complicated way of doing the same as above... \startluacode context("Read the following and also what ") context("\\goto{Knuth says}[ch:knuth]") context.index("Knuth") context(". See also the ") local s,t = "Index","ref:index" -- context("\\goto{s}[t]") -- this does not work -- context.goto({"Index"},{"ref:index"}) -- this does not work context("\\goto{Index}[ref:index]") \stopluacode \input ward.tex \stopchapter \starttitle[title={Index}] % one could say \pagereference[ref:index], but I need a construction such as this: \startluacode local s,t = "ref:","index" context.pagereference({s..t}) \stopluacode \placeindex \stoptitle \stoptext %% end test-lua-reference.tex

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Re: [NTG-context] To \getbuffer or to \input: which one is it better?
by Hans Hagen 13 Feb '18

13 Feb '18

On 2/11/2018 8:49 AM, Otared Kavian wrote: > On 10 Feb 2018, at 17:56, Hans Hagen <pragma(a)wxs.nl> wrote: >> >> On 2/10/2018 4:10 PM, Otared Kavian wrote: >>> […] >> buffers are quite efficient as they never see the file system while input reads the file each time .. both are fresh reads so they obey catcode changes (different interpretations of characters) >> >> there might be more efficient ways for your case but without an example that's guessing > > Hi Hans, > > Thank you very much for your attention and your explanations about buffers. > > I send below a working example showing what I wish to do: to extract from a data buffer some informations to be typeset separately according to some criteria. Maybe I am using the buffer where the data is stored inappropriately, but I can obtain what I want. > > However if a sorting were necessary, then my approach would not work…. Is it possible to sort the buffer containing the data according to some key? Think different ... see end. > Best regards: OK > > %% begin setvariable-getbuffer.tex > \startbuffer[talkdata] > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > \setvariables[talk]% > [speakername={Gauss}, > title={Remarks on Number Theory}, > time={8am}, > room={B}, > day={Monday}, > ] > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > \setvariables[talk]% > [speakername={Ampère}, > title={What is Magnetism}, > time={10am}, > room={A}, > day={Monday}, > ] > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > \setvariables[talk]% > [speakername={Dirac}, > title={Quaternions and the wave equation}, > time={11am}, > room={B}, > day={Tuesday}, > ] > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > \stopbuffer > > % we define what is to be typeset for each day > \define[1]\talksofday{% > \expdoif{\getvariable{talk}{day}}{#1}{% > \starttabulate[|f{\bi}l|p|][before=]% > \NC Speaker \EQ \getvariable{talk}{speakername} \NC\NR > \NC Title \EQ \getvariable{talk}{title} \NC\NR > \NC Location and Time \EQ Room \getvariable{talk}{room}, > at \getvariable{talk}{time} \NC\NR > \HL > \stoptabulate > } > } > > % we define what is to be typeset for each room > \define[1]\talksofroom{% > \expdoif{\getvariable{talk}{room}}{#1}{ > \starttabulate[|f{\bi}l|p|][before=]% > \NC Speaker \EQ \getvariable{talk}{speakername} \NC\NR > \NC Title \EQ \getvariable{talk}{title} \NC\NR > \NC Day and Time \EQ \getvariable{talk}{day}, at \getvariable{talk}{time} \NC\NR > \HL > \stoptabulate > } > } > > \starttext > > \starttitle[title={Monday talks}] > \setvariable{talk}{set}{\talksofday{Monday}} > \getbuffer[talkdata] > \stoptitle > \page > > \starttitle[title={Tuesday talks}] > \setvariable{talk}{set}{\talksofday{Tuesday}} > \getbuffer[talkdata] > \stoptitle > \page > > \starttitle[title={Talks in room B}] > \setvariable{talk}{set}{\talksofroom{B}} > \getbuffer[talkdata] > \stoptitle > > \stoptext > %% end setvariable-getbuffer.tex \startluacode -- document.speakerdata = table.load("somefile.lua") -- -- with somefile.lue: return { ... } document.speakerdata = { { speakername = "Gauss", title = "Remarks on Number Theory", time = "8am", room = "B", day = "Monday", }, { speakername = "Ampère", title = "What is Magnetism", time = "10am", room = "A", day = "Monday", }, { speakername = "Dirac", title = "Quaternions and the wave equation", time = "11am", room = "B", day = "Tuesday", }, } \stopluacode \startluacode document.talksofday = function(how) local data = document.speakerdata if how == "speakername" then local sort = { } for i=1,#data do sort[i] = data[i] end table.sort(sort,function(a,b) return a.speakername < b.speakername end) data = sort end context.starttabulate { "|f{\\bi}l|p|" } context.HL() for i=1,#data do local d = data[i] context.NC() context("Speaker") context.EQ() context(d.speakername) context.NC() context.NR() context.NC() context("Title") context.EQ() context(d.title) context.NC() context.NR() context.NC() context("Location and Time") context.EQ() context("Room %s at %s",d.room,d.time) context.NC() context.NR() context.HL() end context.stoptabulate() end \stopluacode \starttext \starttitle[title={Monday talks}] \ctxlua{document.talksofday()} \stoptitle \starttitle[title={Monday talks}] \ctxlua{document.talksofday("speakername")} \stoptitle \starttitle[title={Monday talks}] \ctxlua{document.talksofday()} \stoptitle \stoptext ----------------------------------------------------------------- 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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issue with string.collapsespaces()
by Pablo Rodriguez 12 Feb '18

12 Feb '18

Dear list, I have the following sample: \starttext \startlua a = "a bc de" context(string.collapsespaces(a)) \stoplua \stoptext Sorry for the stupid question, but isn’t the collapsespaces function intended to remove spaces? What am I missing here? Many thanks for your help, Pablo -- http://www.ousia.tk

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Re: [NTG-context] notes in the margin
by Henning Hraban Ramm 12 Feb '18

12 Feb '18

Ahoi, I’m still working on this issue. For the usual cases, the current mechanism is good (see attachment). * I gave up on the number placement in its own line (without text indent). * Footnotes in captions mostly disappear. * Footnotes in captions or other boxed environments (chapter title in my case) get misplaced, e.g. if a figure is narrower than \textwidth, the margin note is moved into the textarea by the difference. \startplacefigure[location=here,title={Some caption\footnote{Source of the image. This disappeares or gets misplaced}}] \externalfigure[cow]%[width=.8\textwidth] \placelocalfootnotes % doesn’t change anything \stopplacefigure * Further, in some cases it would be good to move the margin note by a few lines higher or lower. \inmargin has this first parameter: "+ - low" in reference, e.g. \inmargin [method=first,voffset=-6pt] in source typo-mar.mkiv) I just need a way to transfer this option through \footnote: I used a global definition that I redefine where I need it: \def\FNVOffset{0} % vertical shift of footnotes in negative lines % this is unclean, but works quite well \define\PlaceFootnote% {\inmargin[voffset=\dimexpr-\FNVOffset\lineheight\relax]{\vtop{\placelocalnotes[footnote][before=,after=]}}} \def\FNo#1{{\ss\tfx #1}} \setupnote[footnote] [location=text, bodyfont=, indenting=no, before={\noindent}, next=\PlaceFootnote] \setupnotation[footnote][ way=bychapter, align=flushleft, style={\ss\tfx}, indenting=no, location=serried, alternative=serried, width=broad, numbercommand=\FNo, ] \setuptexttexts[margin][] [{\framed[ align={flushleft,bottom}, frame=off, height=\textheight, width=\rightmarginwidth]{% \strut\vfill\placenotes[footnote]}}] \setupmargindata[inmargin][location=outer,stack=continue,align=flushleft,style={\ss\tfx}] \setupmargindata[inouter][location=outer,stack=continue,align=flushleft,style={\ss\tfx}] Greetlings, Hraban --- http://www.fiee.net http://wiki.contextgarden.net GPG Key ID 1C9B22FD

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Re: [NTG-context] ntg-context Digest, Vol 164, Issue 29
by Jeong Dal 11 Feb '18

11 Feb '18

Dear Wolfgang, “\setupmathematics[integral=nolimits]” did what I want. If I knew this two weeks ago, I saved my time to edit formulas. I should ask for this feature two weeks ago. There are so many things in ConTeXt that I don’t know. Thank you. Best regards, Dalyoung > \starttext > > \startformula > \int_{0}^{1} g(x)\,\diff x = 1 > \stopformula > > \setupmathematics[integral=nolimits] > > \startformula > \int_{0}^{1} g(x)\,\diff x = 1 > \stopformula > > \setupmathematics[integral=limits] > > \startformula > \int_{0}^{1} g(x)\,\diff x = 1 > \stopformula > > \stoptext > > > Wolfgang

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Typesetting an interview
by Henning Hraban Ramm 11 Feb '18

11 Feb '18

Ahoi, I’m trying to typeset an interview and thought, a "description" might be the best setup. But I can’t find the right parameters for the layout I want... Every contribution should look like: """ HHR Here’s the text, question or answer. OTR And here’s the next one. Might have several lines. """ Working example: \definedescription[Interview][ headstyle=italic, style=normal, align=flushleft, alternative=hanging, ] \def\dostartInterview[#1][#2]% {\doifsomethingelse{#2}% {\startInterview[reference={#1},title={#2}]}% {\startInterview[title={#1}]}% } \def\startInt{\dodoubleempty\dostartInterview} \def\stopInt{\stopInterview} \starttext \chapter{An Interview} \startInt[{Hennning Hraban Ramm (HR)}] This might be a short question or a long response. Name or initials of the person should stand in their own line (without breaking), while the answer should be indented, without additional paragraph indent. \stopInt \startInt[{Hans Hagen (HH)}] And I’m sure the author has something to say. \input tufte \stopInt \startInt[HR] \input knuth \stopInt \startInt[HH] \input zapf \stopInt \startInt[thankyou][HR] This might also have a reference. \stopInt \stoptext Greetlings, Hraban --- http://www.fiee.net http://wiki.contextgarden.net GPG Key ID 1C9B22FD

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avoiding space on top of a page
by Henning Hraban Ramm 11 Feb '18

11 Feb '18

Ahoi, I configured my section titles to have a line of space (\blank[big]) before and after the title. But if the section starts on a new page, the title should start in the first line. I couldn’t find the right combination of \blank options... \setuplayout[grid=yes] \setuphead[section][ page=no, style={\bf}, before={\testpage[4]\startlinecorrection\blank[medium,back]}, after={\blank[small,max]\stoplinecorrection}, ] (Please find working example attached.) Greetlings, Hraban --- http://www.fiee.net http://wiki.contextgarden.net GPG Key ID 1C9B22FD

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Midsentence alias
by Idris Samawi Hamid ادريس سماوي ح امد 11 Feb '18

11 Feb '18

Dear gang, Midsentences in the ConTeXt sense are quite common. Consider the following: ======= \setuplanguage[en] [leftsentence={{} \endash\nobreakspace}, rightsentence={{} \endash\nobreakspace}, leftsubsentence={{} \textbar\nobreakspace}, rightsubsentence={{} \textbar\nobreakspace}, midsentence={{} \endash\nobreakspace}] \starttext This is a sentence|<|this is a subsentence|>|that includes a subsentence. \blank This is a sentence|<|this is a subsentence|<|this is a nested subsentence|>|that includes a nested subsentence|>|that includes a subsentence. \blank This is a sentence that ends in a midsentence\midsentence Here is the midsentence. \stoptext ======= A primary subsentence or nested subsentence is marked off by |<| and |>| respectively. Is there an analogous symbol for a midsentence, which requires a mark only at its beginning? If not, how can I make a private one? For example: This is a sentence that ends in a midsentence|<>|Here is the midsentence. How can I properly define |<>| to be an alias for \midsentence, in a way consistent with the rest of the subsentence mechanism? Note: Could only find one reference to midsentence in the sources: lang-ini.mkiv, line 354 If this is not already supported, would like to propose that |<>| be added to ConTeXt as an alias for \midsentence. BTW: It may appear that one can just use |<| to mark a midsentence, but then the next subsentence in the document will be treated as a nested subsentence. Thank you in advance! Best wishes Idris -- Idris Samawi Hamid, Professor Department of Philosophy Colorado State University Fort Collins, CO 80512

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