October 2011 - ntg-context - NTG Mailing Lists

Learning layers: setlayer vs. setlayerframed
by Mari Voipio 26 Oct '11

26 Oct '11

Hello! Based on a discussion with Hans at the ConTeXt meeting I'm starting to migrate my book covers from CorelDraw to ConTeXt using layers. After a bit of experimenting I managed to achieve my first layer, but looking at the examples on the wiki page, I'm wondering: what's the difference between \setlayer and \setlayerframed. Is the latter a subset of the first and possibly equal to \setlayer [name] % name of the layer {\framed[...=...,...=...]{LAYER}} % the actual contents of the layer or something else? And which one should I use, anyway? I need to put a bit of text and a bit of graphics onto the pages, but nothing complicated, just "boxes". But as I'm starting from zero, it would be nice to know what's the smartest way of doing it (on the moment). I'm running the newest or at least almost newest beta of ConTeXt and can update if needed. Thanks, Mari

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tilde
by Wolfgang Werners-Lucchini 25 Oct '11

25 Oct '11

Hallo, if I want a non-breaking-space I use a tilde '~' sign. For example in: bakerstreet~13 This has worked in my old context. But now, after my update, I get an very long space. Minimal example: \starttext \framed[align=flushright,width=broad]{Hello~World!} \stoptext Is this a bug? What else kann I use for a non-breaking-space? Wolfgang

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How do I test for empty labeltext?
by Mojca Miklavec 25 Oct '11

25 Oct '11

Hello, The following code \setuplabeltext[test=] test is \doifemptyelse{\labeltext{test}}{empty}{not empty} doesn't work as intended for the reasons that I approximately understand (not exactly, but I understand that there might be a lot of weird stuff returned when I ask for labeltext). However I have no idea how to check if text is empty or not. As an exception :) :) :), MKIV hints should be highly appreciated and enough for this particular application. Mojca PS: the extended example looks approximately as follows: \def\document#1#2{ \setuplabeltext[name={{#1}},company={{#2}}] \startstandardmakeup \setups{content} \setups{decoration} \stopstandardmakeup } \startsetups content This is for \labeltext{name}% \doifemptyelse{\labeltext{company}}{.}{, working for \labeltext{company}.} \stopsetups I have no problem changing the complete code and I can already find a workaround by defining some new "if" inside definition of \document, but I'm still slightly curious to know how to test for existence of a label. The sources contain definelabels("setuplabeltext", data.texts, true) and it is not too clear to me how to decrypt the rest with too much pain.

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xml and lpath
by Martin Fechner 25 Oct '11

25 Oct '11

Hi all, I'm testing the possibilities of xml and ConTeXt. I was wondering if it is possible to make an extra setup for every text-element. So it would be possible to have an setup in a very flexible way. It should be something like this: \startbuffer[text] <a> <b> First text. <hiding type="begin"/> Second text. </b> Third text. <hiding type="end"/> Fourth text. </a> \stopbuffer \startxmlsetups xml:textsetups \xmlsetsetup{#1}{a|b}{xml:*} \xmlsetsetup{#1}{hiding[type='begin']}{xml:hiding:begin} \xmlsetsetup{#1}{hiding[type='end'}{xml:hiding:end} \xmlsetsetup{#1}{text()}{xml:text} % Something like this is needed \stopxmlsetups \startxmlsetups xml:a \xmlflush{#1} \stopxmlsetups \startxmlsetups xml:b \xmlflush{#1} \stopxmlsetups \startxmlsetups xml:hiding:begin \enablemode[hiding] \stopxmlsetups \startxmlsetups xml:hiding:end \disablemode[hiding] \stopxmlsetups \startxmlsetups xml:text \startnotmode[hiding] \xmlflush{#1} \crlf \stopnotmode \stopxmlsetups So that the result will be: First text. Fourth text. Is something like this possible or is there still another way? Best regards, Martin

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Luatex question
by Lutz Haseloff 25 Oct '11

25 Oct '11

Hi all, some months ago I printed the name of the current font with following code: \starttext The current font is: \ctxlua{tex.print(font.getfont(font.current()).fullname)}. \stoptext Now I get an error message: ! LuaTeX error <main ctx instance>:1: no string to print stack traceback: [C]: in function 'print' <main ctx instance>:1: in main chunk. l.2 ...int(font.getfont(font.current()).fullname)} . ? What is the right way now? (didn't find any news in functionref.pdf or luatexref-t.pdf) Greetings Lutz

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Re: [NTG-context] Links in exported XHTML file
by Andreas Harder 25 Oct '11

25 Oct '11

On 25.10.2011, at 00:20, Hans Hagen wrote: > On 24-10-2011 23:22, Andreas Harder wrote: >> >> On 24.10.2011, at 15:01, Hans Hagen wrote: >> >>> On 21-10-2011 11:27, Andreas Harder wrote: >>>> \setupinteraction[state=start] >>>> >>>> \setupbackend[export=yes,xhtml=yes,css=export-example.css] >>>> >>>> \starttext >>>> \useURL[google][http://www.google.com/][][Google] \from[google] >>>> \textreference[txt:ref]{some text} \in[txt:ref] % OK >>>> \goto{Google}[url(http://www.google.com/)] >>>> \stoptext >>> >>> in next beta >> >> Thanks Hans, but now the text reference is *not* wrapped in xhml:a-tags. > > at.href = "#" .. gsub(at.location,":","_") > > => > > href = "#" .. gsub(at.location,":","_") Thanks again, but here is another one … sorry for complaining \setupinteraction[state=start] \setupbackend[export=yes,xhtml=yes,css=export-example.css] \starttext \goto{Pragma (url)}[url(http://www.pragma-ade.com/)] % OK \goto{PDF (file)}[file(http://www.pragma-ade.com/general/manuals/ms-cb-en.pdf)] \goto{PDF (fileorurl)}[fileorurl(http://www.pragma-ade.com/general/manuals/ms-cb-en.pd… \stoptext Andreas

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Question about chapter headings
by Alasdair McAndrew 25 Oct '11

25 Oct '11

I'm trying to set up a chapter heading which looks like this: Chapter 4 This is the fourth chapter That is, there are two lines, one of which says "Chapter" followed by its number, and the next which is the chapter title. What is the easiest way to do this? I've tried \def\chap#1#2{Chapter #1\crlf #2} \setuphead[chapter][ command=\chap, style=bfc, after={\blank[1cm]}, ] But this doesn't work (and nor do many other variations in the "chap" command). I'm a bit stymied here - and I'd welcome some advice. Thanks, Alasdair

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Anand Raj wants to chat
by Anand Raj 24 Oct '11

24 Oct '11

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Image compression/resizing in PDFs
by John Devereux 24 Oct '11

24 Oct '11

Hi all, Is there a way to have context automatically compress or resample included images to a given output resolution? I have not been following recent developments... I can obviously "pre-reduce" all images to the desired dpi. But: 1) This is a bit of work (and hard to get non-technical people to do) 2) In 5 years time we might want the images to be higher resolution and not be as concerned about PDF size. But the information will be lost (or be elsewhere). So a command line or document setting would be ideal, is there such a thing? \setpdfimageresolution[300dpi]. Thanks, -- John Devereux

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Links in exported XHTML file
by Andreas Harder 24 Oct '11

24 Oct '11

Hi all, how do I manage to get proper links in the exported XHTML document. It works well with intern references. \setupinteraction[state=start] \setupbackend[export=yes,xhtml=yes,css=export-example.css] \starttext \useURL[google][http://www.google.com/][][Google] \from[google] \textreference[txt:ref]{some text} \in[txt:ref] % OK \goto{Google}[url(http://www.google.com/)] \stoptext I would appreciate any tips. Regards Andreas

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