May 2018 - ntg-context - NTG Mailing Lists

libcurl via FFI
by Henri Menke 17 May '18

17 May '18

Dear list, As announced in another thread, here a better annotated example of using libcurl via FFI in ConTeXt, see attached. On my old laptop: context: 3.482 seconds context --jit: 2.742 seconds context --jiton: 2.693 seconds Cheers, Henri

1 0

Files on a server
by Hans van der Meer 17 May '18

17 May '18

I tried to determine the existence of a file on the internet. See the following macro call: % Test if file exists. \edef\theurl{\linkprotocol://\urlbase\xmlatt{#1}{link}\thesuffix} \doiffileelse {\theurl} {\verbose{HVDM-PEV-TEST}{file exists: \theurl}} {\verbose{HVDM-PEV-TEST}{file does not exist: \theurl}} It seems that \doiffileelse always results in true except for local files where nonexistence is correctly handled. For example the following url definitely does not exist but nevertheless \doiffileelse reports its existence: HVDM-PEV-TEST > file exists: http://hansvandermeer.myqnapcloud.com/archive/denhaag/hga-dtb-1869-6040.pdf Is it possible that the \doiffile macros are extended for files on the internet or a correponding set \doifurl is developed? Hans van der Meer

6 18

Fwd: Re: roadmap
by Hans Hagen 16 May '18

16 May '18

-------- Forwarded Message -------- Subject: Re: [NTG-context] roadmap Date: Wed, 16 May 2018 17:37:30 +0200 From: Hans Hagen <j.hagen(a)xs4all.nl> To: Pablo Rodriguez <oinos(a)gmx.es> On 5/16/2018 5:18 PM, Pablo Rodriguez wrote: > On 05/15/2018 11:26 PM, Hans Hagen wrote: >> On 5/15/2018 9:17 PM, Pablo Rodriguez wrote: >>> [...] >>> Hans, >>> >>> I wonder whether it would be possible to implement a feature that you >>> mentioned in the past. >>> >>> In order to avoid widow and orphan lines, you mentioned that it would be >>> possible to automatically adapt the interline space for the page, so >>> that it may have one more line to avoid orphans (when interline space is >>> decreased) or it may move a line to the next page to avoid widows >>> (increasing the interline space in the present page). >>> >>> Would it be possible to add this feature to ConTeXt? >> >> actually it was something that came up when talking with Hermann Zapf >> years ago: he suggested to just vertically scale the text area (i >> actully implemented that an hour later) ... his opinion was that only a >> very small percentage of readers will notice (at that time we did >> experiments with hz, the expansion in pdftex: in fact nobody noticed >> that too, real interesting was that texies commented on all kind of >> things related to how tex is supposed to work: a clear demonstration >> that the average user knows what the virtues of tex are but not really >> sees it) > > I must confess that I can recognize hanging characters, but quality > expansion is impossible to see (at least, for me). > > I would even say that if expansion can be seen by a human reader, the > results will be crappy. > > How can I use the vertical scale feature to prevent widows and orphans? not now ... it was a mkii experiment more than a decade ago 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 -----------------------------------------------------------------

2 2

Re: [NTG-context] roadmap
by Christoph Reller 15 May '18

15 May '18

On Tue, 15 May 2018 08:23:04 +0200 luigi scarso <luigi.scarso(a)gmail.com> wrote: > > On Tue, May 15, 2018 at 8:15 AM, Christoph Reller < > christoph.reller(a)gmail.com> wrote: > > > > > Our company is producing (and weekly updating) 67 manuals and > > technical documents from more than 900 ConTeXt source files for our > > software products. The output PDFs are converted to PDF/A-2a, which is > > only possible due to ConTeXt's tagging. > > > What do you think of verapdf ? > Well, verapdf is only a validator and not a converter. And, by the way, there is no reasonable way to convert from, say, PDF/A-2b to PDF/A-2a without a rediculous amount of AI or manual input because the tagging cannot be created out of the blue. It has to be there from the document's birth. This is what makes this ConTeXt feature so precious. Cheers, Christoph >

2 1

Re: [NTG-context] roadmap
by Christoph Reller 15 May '18

15 May '18

On Tue, May 15, 2018 at 12:53 AM, <ntg-context-request(a)ntg.nl> wrote: > > > Message: 3 > Date: Mon, 14 May 2018 23:26:28 +0200 > From: Hans Hagen <j.hagen(a)xs4all.nl> > To: Henning Hraban Ramm <texml(a)fiee.net>, mailing list for ConTeXt > users <ntg-context(a)ntg.nl> > Subject: Re: [NTG-context] roadmap > Message-ID: <c504ea08-a021-4444-4eba-c2894d72da52(a)xs4all.nl> > Content-Type: text/plain; charset=utf-8; format=flowed > > On 5/14/2018 9:36 PM, Henning Hraban Ramm wrote: > > Hi Hans, thank you so much! Keep up the good work! > > * PDF/* (X, A, UA - probably only reasonable with external tools, but it seems like there’s not a lot that’s usable) > > we support various formats (to some extend the backend even adapts to > it) ... tagged pdf ... already there for quite a while but i never had > any demand for it so i never really check the current state (also > because imo it's a it weird feature ... only there because publishers > don't want to distribute sources that are suitable for rendering > variations ... so we're stuck with some pseudo structure related to > visuals) > > (i might upgrade tagging and exports as they closely relate but it's not > easy to get motivated for something that one has no real use for so at > most it will cold winter evening stuff) To us, tagged PDF is important. Specifically, for PDF/A with compliance level a, tagging is mandatory. ConTeXt is the only (!) TeX-based PDF creation suite that can produce correct and reliable tagging. Our company is producing (and weekly updating) 67 manuals and technical documents from more than 900 ConTeXt source files for our software products. The output PDFs are converted to PDF/A-2a, which is only possible due to ConTeXt's tagging. >From what we hear of our customers, PDF/A level a and PDF/UA are becoming increasingly important, be it because of archiving issues or because of legislation requirements. So please, maintain this invaluable feature! Cheers, and thank you for all the effort. Christoph

3 2

luatex hangs with \placebookmarks
by Joseph Canedo 12 May '18

12 May '18

Dear list, I use $ context --version mtx-context | ConTeXt Process Management 1.02 mtx-context | current version: 2018.04.19 15:53 With this simple attached MWE, I have luatex hanging in run 3. No idea what I am doing wrong. In other cases I get a lua error (could not write a MWE yet that reproduces this) : lua error > lua error on line 0 in file : ...est/tex/texmf-context/tex/context/base/mkiv/lpdf-ano.lua:292: attempt to index a nil value Thanks a lot Best regards Joseph

1 2

embolden a font
by Ulrike Fischer 12 May '18

12 May '18

Is there anywhere an option to get an embolden effect as with the following pdf literal? I found the extend option but it doesn't give the intended look \starttext \font\test={Arial:mode=node;script=latn;language=DFLT;+tlig;} \test abc \pdfextension literal direct {2 Tr 0.15 w}% abc \pdfextension literal direct {0 Tr 0 w}% \font\test={Arial:mode=node;script=latn;language=DFLT;+tlig;extend=1.1} \test abc \stoptext -- Ulrike Fischer http://www.troubleshooting-tex.de/

3 5

packslashes not working in latest beta
by Pablo Rodriguez 12 May '18

12 May '18

Dear list, I have the following sample: \enabledirectives[hyphenators.urls.packslashes] \starttext \hsize\zeropoint \hyphenatedurl{http://www.pragma-ade.com} \stoptext Using latest beta (2018.04.19 15:53), the directive doesn’t seem to work. (The two contiguous slashes are placed in different lines.) Can anyone confirm this? Many thanks for your help, Pablo -- http://www.ousia.tk

1 1

blank line at the beginning of the theorem or proof
by Jeong Dal 12 May '18

12 May '18

Dear all, placing a figure at the right or left of the text using \placefigure[right][]{}{} insert at the begining of the paragraph under the enumerations while there is no blank line if we comment out \placefigure. See the below sample. Is there a way to make text begin from the same line of “Theorem 1” with the figure at the right? Thank you. Best regards, Dalyoung \defineenumeration[Theorem] [text={\translate[en=Theorem, kr=정리]}, style=, title=yes, prefix=yes, prefixsegments=chapter, way=bychapter, number=yes, before={\blank[big]}, after=\blank] \defineenumeration[Proof] [text={\translate[en=Proof, kr=증명]}, % headstyle=bold, alternative=hanging, titlestyle=, style=normal, number=no, closesymbol=\mathematics{\blacksquare},] \startbuffer[circleA] draw fullcircle scaled 2cm; \stopbuffer \starttext \startTheorem %\placefigure[right][]{}{\processMPbuffer[circleA]} This is a test for placing a figure in the theorem or in the proof. \tex{placefigure[right][]{}{\processMPbuffer[circleA]}} insert a blank line at the beginning of the paragraph while there is no blank line without a figure. %\placefigure[right][]{}{\processMPbuffer[circleA]} \stopTheorem \startProof %\placefigure[right][]{}{\processMPbuffer[circleA]} \input knuth \stopProof \stoptext

1 0

registers: how can I place a command around the whole of the page numbers of an index term?
by MF 10 May '18

10 May '18

Hello list, i'd like moving the page numbers in my index to the right, with a \wordright. \setupregister[index][n=1,alternative=A] \starttext \CONTEXT\index{\ConTeXt} \page \LATEX\index{\LaTeX} \page \CONTEXT\index{\ConTeXt} \page \placeindex \stoptext The index is at page 4. I want to move the numbers "1,3" and "2" to the right. The parameter pagecommand is for the single page number, i want to put a command (\wordright) around the whole block of page numbers. How can i do that? Greetings, Massi

3 7