January 2018 - ntg-context - NTG Mailing Lists

Django: using ConTeXT mkiv to output PDF
by kaddour kardio 02 Feb '18

02 Feb '18

i have a small Django app <https://bitbucket.org/kaddourkardio/kardiology> to manage my patients data, and use LaTeX to output reports. It consists un a *parent* model called Patients and child models Consultation , StressEcho and so on. With LaTex this works without problems def courrier_pdf(request, pk2, pk1): entry = Courrier.objects.get(pk=pk2) source = Patient.objects.get(pk=pk1) context = dict({'courrier': entry, 'patient': source})#buffer = BytesIO()template = get_template('courrier/courrier.tex') rendered_tpl = template.render(context, request).encode('utf-8')#Python3 only. For python2 check out the docs!with tempfile.TemporaryDirectory() as tempdir: # Create subprocess, supress output with PIPE and # run latex twice to generate the TOC properly. # Finally read the generated pdf. for i in range(2): process = Popen( ['xelatex', '-output-directory', tempdir], stdin=PIPE, stdout=PIPE, ) process.communicate(rendered_tpl) with open(os.path.join(tempdir, 'texput.pdf'), 'rb') as f: pdf = f.read() r = HttpResponse(content_type='application/pdf') r.write(pdf)return r i tried with this view in order to use ConTeXT but without success def courrier_mkiv(request, pk2, pk1): entry = Courrier.objects.get(pk=pk2) cource = Patient.objects.get(pk=pk1) context = dict({'courrier': entry, 'patient': cource})# buffer = BytesIO()template = get_template('courrier/courrier.mkiv') rendered_tpl = template.render(context, request).encode('utf-8')with tempfile.TemporaryDirectory() as tempdir: process = Popen(['context', '--result', tempdir], stdin=PIPE, stdout=PIPE, ) process.communicate(rendered_tpl) with open(os.path.join(tempdir, 'textput.pdf'), 'rb') as f: pdf = f.read() r = HttpResponse(content_type='application/pdf') r.write(pdf)return r My feeling is that the problem is in the workspace since i get logfiles in the root of my app Here is log file from ConTeXT: open source > level 1, order 1, name '/home/kaddour/context/tex/texmf- context/tex/context/base/mkiv/cont-yes.mkiv' system > system > ConTeXt ver: 2018.01.04 17:37 MKIV beta fmt: 2018.1.4 int: english/english system > system > 'cont-new.mkiv' loaded open source > level 2, order 2, name '/home/kaddour/context/tex/texmf- context/tex/context/base/mkiv/cont-new.mkiv' close source > level 2, order 2, name '/home/kaddour/context/tex/texmf- context/tex/context/base/mkiv/cont-new.mkiv' system > files > jobname 'tmpy82c5j7i', input '/tmp/tmpy82c5j7i', result 'tmpy82c5j7i' fonts > latin modern fonts are not preloaded languages > language 'en' is active tex error > tex error on line 8 in file /home/kaddour/context/tex/texmf- context/tex/context/base/mkiv/cont-yes.mkiv: ! I can't find file `/tmp/tmpy82c5j7i'. l.8 } I tried this in my view os.chdirw(tempdir) just before process without success. My guess is that ConTeXT option --result= does not behave exactly like LaTeX's -output-directoryAny help is welcome i really need ConTeXT for my work and this problem is driving me mad! -- Dr YAHYAOUI Mohamed Kaddour, cardiologue -- Clinique KARDIA.

4 9

\setvariables and database module
by Otared Kavian 02 Feb '18

02 Feb '18

Hi all, I need to create a document using a database and the \setvariables command (which I understood thanks to Wolfgang Schuster). Everything works fine except that using the approach below I need to change the entries in the database by enclosing each entry between a pair of braces {}, because otherwise the macro I have imagined does not work as expected. In the example below the first line of entries is treated correctly, while the second one is understood wrongly by my macro \maketalk defined below in the minimal example. It is indeed possible, in theory, to change the database file so that each entry is enclosed in a pair of braces, but I would like to avoid that mainly because I am not the one who produces nor maintains that file and I want to avoid modifying a copy of that file myself. How can I change my approach to this problem in order to achieve what is needed? Many thanks for any hint. Best regards: OK % begin database-command.tex \usemodule[database] \starttext \startbuffer[pagetalk] \starttabulate[|f{\bi}l|p|][before=]% \NC Speaker \EQ \goto{{\sc \getvariable{talk}{speakername}}}[fig:\getvariable{talk}{speakername}] \NC\NR \NC Title \EQ \getvariable{talk}{title} \NC\NR \stoptabulate \startplacefigure[number=no] \externalfigure[\getvariable{talk}{picture}] \stopplacefigure \page \stopbuffer \setvariable{talk}{set}{\getbuffer[pagetalk]} \define[3]\maketalk{% \setvariables[talk]% [speakername={#1}, title={#2}, picture={#3}, ]} \defineseparatedlist[seplisttalk] [separator={;}, first=\maketalk ] \startseplisttalk {Hacker} ; {Up to date hacking} ; {hacker.jpg} % this works fine Hacker ; Up to date hacking ; hacker.jpg % this does not work: the macro takes only the three characters H a c \stopseplisttalk \stoptext % end database-command.tex

3 12

Expansion help needed, getvariable and TABLE
by Rik Kabel 31 Jan '18

31 Jan '18

Listers, I have a problem, and a question on ConTeXt programming efficiency. In the example below, I have a set of variables. When these are reference directly via \getvariable, everything works as expected in simple text and in TABLEs. When I \define a macro to the \getvariable, that works in simple text, but only the value of the last iteration appears in the TABLE. The macro definition is saved and when it is used, that is the value that it has. So, how can I \define (or \def, ...) a macro to the expanded value to avoid this? That is the problem. The question is, Is there is any advantage to be had in doing this? Assume that the value is referenced many (tens of) times. There seems to be an aesthetic value of factoring out the multiple identical instances of the \getvariable syntax and assigning a more semantically informative name, but beyond that, is there any other value? % macros=mkvi engine=luajittex \setvariables [one] [a=1a,b=1b] \setvariables [two] [a=2a,b=2b] \define \Sets {one,two} \starttexdefinition unexpanded doInlineText #SET Direct: \getvariable{#SET}{a} \getvariable{#SET}{b}\par \stoptexdefinition \starttexdefinition unexpanded doTableRow #SET \bTR \bTC\getvariable{#SET}{a}\eTC \bTC\getvariable{#SET}{b}\eTC \eTR \stoptexdefinition \starttexdefinition doInlineTextExp #SET \define\A{\getvariable{#SET}{a}} \define\B{\getvariable{#SET}{b}} Factored: \A\ \B\par \stoptexdefinition \starttexdefinition doTableRowExp #SET \define\A{\getvariable{#SET}{a}} \define\B{\getvariable{#SET}{b}} \bTR \bTC\A\eTC \bTC\B\eTC \eTR \stoptexdefinition \starttext \starttext \expandafter\processcommalist\expandafter[\Sets]\doInlineText \bTABLE[frame=off] \bTABLEhead \bTR[nc=2] \bTH Direct\eTH \eTR \eTABLEhead \bTABLEbody \expandafter\processcommalist\expandafter[\Sets]\doTableRow \eTABLEbody \eTABLE \expandafter\processcommalist\expandafter[\Sets]\doInlineTextExp \bTABLE[frame=off] \bTABLEhead \bTR[nc=2] \bTH Factored\eTH \eTR \eTABLEhead \bTABLEbody \expandafter\processcommalist\expandafter[\Sets]\doTableRowExp \eTABLEbody \eTABLE \stoptext -- Rik

3 6

Spurious space in \definestartstop
by Henri Menke 31 Jan '18

31 Jan '18

Dear list, the title says it all. Please add \ignorespaces in a place you deem appropriate. MWE is below. Cheers, Henri --- \definestartstop [spurious space] \starttext Hello World Hello \start[spurious space] World \stop % ^^^ spurious space here! \stoptext

4 8

bold formulas
by Alan Braslau 29 Jan '18

29 Jan '18

How to display a bold formula (here Bragg's law): \starttext \startformula \bf 2d\sin θ_n = nλ \stopformula \stoptext The problem is that \sin is not bold. Suggestions on better practice? Alan

1 0

about \placeindex: uppercase initial and lowercase initial, two languages
by Jeong Dal 28 Jan '18

28 Jan '18

Hi, To place the index at the end of the book, I put \placeindex before \stopproduct. It is compiled well. But, for the better output, I have two questions about the index. 1. In the output, it distinguished uppercase and lowercase initial. For example, S Squeeze theorem s set simple statements … Is there a way to make index combining the lowercase and the uppercase together as follows? s set simple statements … Squeeze theorem 2. The index shows the English letters first and the Koren letters follows. Although it is OK that English words are shown first, is there a way to make Korean words are shown first since the main language is Korean? Since I just use “\placeindex”, I don’t give a Minimal sample. Thank you. Best regards, Dalyoung

2 1

Re: [NTG-context] How to make the first chapter number 0?
by Jeong Dal 28 Jan '18

28 Jan '18

Dear Lukas, Thank you for the solution. It works fine for all, definitions, theorems, … except the numbers which I defined for exercise. I’ll change the number definition of exercise following your example. Thank you again. Best regards, Dalyoung

1 0

How to make the first chapter number 0?
by Jeong Dal 27 Jan '18

27 Jan '18

Hi, I’d like to start the chapter number from 0. So I tried “\setcounter[chapter][-1]” or “\setcounter[chapter][0]” to test, but it doesn’t work. Is there any good method to make the number of the first chapter 0? Thank you for reading. Best regards, Dalyoung

2 1

Placing a figure with a command for the file in mkiv
by Otared Kavian 27 Jan '18

27 Jan '18

Hi all, I have a document (sort of proceedings of a meeting) which have to contain several pages, with each page dedicated to an author and a specific figure (say a photo). In mkii I used to do have a command like \define\authorpicture{hacker.jpg} and then use a command like: \externalfigure[\authorpicture] to include that figure in the text, and everythinng worked ver nicely in my big document. Unfortunately this scheme does not work anymore in mkiv… How can I change the following code (which works in mkii) in order to have it work in mkiv? Thanks in advance for any help: OK %%% begin dynamic-filename-figure.tex \starttext \define\authorpicture{hacker.jpg} \placefigure[here][fig:Myfigure]{} {\externalfigure[\authorpicture]} \stoptext %%% end dynamic-filename-figure.tex

2 4

Bug in interaction and button?
by Otared Kavian 27 Jan '18

27 Jan '18

Hi Hans, While experimenting with \button according to your suggestions, I noticed that there might be a bug somewhere between interaction and the button command: the following code (sent by you some years ago…) works fine as expected in mkii but does not work in mkiv (neither the most recent beta, nor the stable one from TeXLive 2017). The link to jump to the figure works fine, but the one to jump back (PreviousJump) does not work in mkiv. Thanks for your attention: OK %% begin go-back-tofig.tex \setupinteraction[state=start] \starttext \dorecurse {2} { See \in{figure}[fig:#1].\par \input knuth.tex \page \placefigure [here] [fig:#1] {} {\button[offset=overlay]{\externalfigure[cow.pdf]}[PreviousJump]} \input ward.tex \page} \stoptext %% end go-back-tofig.tex

2 1