Figures and Lua (continuing "Number of pages by Lua of a figure to be inserted?" somehow)

Figures and Lua (continuing "Number of pages by Lua of a figure to be inserted?" somehow)

[Procházka Lukáš Ing. - Pontex s. r. o.]

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Hello,

I tried to make a "more minimal" example.

Still we have:

files:

./t3.mkiv
./T/Kn.pdf

and code:

----
\startluacode
   test = function(fn)
     local fig = figures.push{name = fn}
       if figures.identify().status.status ~= 0 then
         figures.check()
       end
     figures.pop()

     return fn .. ": " .. (fig.used.pages or "?") .. "\\par"
   end
\stopluacode

\starttext
   AAA

   \startluacode
     context(test("T/Kn.pdf")) -- Found - OK
     context(test("Kn.pdf")) -- Not found - OK
   \stopluacode

   \setupexternalfigures[directory=T]

   \startluacode
     context(test("Kn.pdf")) -- Not found (or unknown number of pages) - UNEXPECTED - why? ("3rd call")
   \stopluacode

   \externalfigure[Kn.pdf][scale=625] % Found - OK
\stoptext
----

The 3rd call of 'test()' seems to not locate 'Kn.pdf' although the path was altered by preceding \setupexternalfigures.

How to modify the 'test()' to work properly even in the 3rd case?

NB:
Sorry for repeating the topic "in another coat" - it may not be so interesting for listeners of this mailing list.
But the goal is to add figures and PDF files into the document automatically.
One of the tasks is to detect number of pages of the figure.
The code above is a core cut out; it should work (or: if this part wouldn't work, neither would the rest) even in the 3rd case.

Any help to make the piece of code work would be appreciated.

Best regards,

Lukas


-- 
Ing. Lukáš Procházka [mailto:LPr@pontex.cz]
Pontex s. r. o.      [mailto:pontex@pontex.cz] [http://www.pontex.cz]
Bezová 1658
147 14 Praha 4

Tel: +420 244 062 238
Fax: +420 244 461 038

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\startluacode
  test = function(fn)
    local fig = figures.push{name = fn}
      if figures.identify().status.status ~= 0 then
        figures.check()
      end
    figures.pop()

    return fn .. ": " .. (fig.used.pages or "?") .. "\\par"
  end
\stopluacode

\starttext
  AAA

  \startluacode
    context(test("T/Kn.pdf")) -- Found - OK
    context(test("Kn.pdf")) -- Not found - OK
  \stopluacode

  \setupexternalfigures[directory=T]

  \startluacode
    context(test("Kn.pdf")) -- Not found - UNEXPECTED - why?
  \stopluacode

  \externalfigure[Kn.pdf][scale=625] % Found - OK
\stoptext

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Re: Figures and Lua (continuing "Number of pages by Lua of a figure to be inserted?" somehow)

[Aditya Mahajan]

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On Fri, 12 Apr 2013, Procházka Lukáš Ing. - Pontex s. r. o. wrote:

> Hello,
>
> I tried to make a "more minimal" example.
>
> Still we have:
>
> files:
>
> ./t3.mkiv
> ./T/Kn.pdf
>
> and code:
>
> ----
> \startluacode
> test = function(fn)
>   local fig = figures.push{name = fn}
>     if figures.identify().status.status ~= 0 then
>       figures.check()
>     end
>   figures.pop()
>
>   return fn .. ": " .. (fig.used.pages or "?") .. "\\par"
> end
> \stopluacode
>
> \starttext
> AAA
>
> \startluacode
>   context(test("T/Kn.pdf")) -- Found - OK
>   context(test("Kn.pdf")) -- Not found - OK
> \stopluacode
>
> \setupexternalfigures[directory=T]
>
> \startluacode
>   context(test("Kn.pdf")) -- Not found (or unknown number of pages) - 
> UNEXPECTED - why? ("3rd call")
> \stopluacode
>
> \externalfigure[Kn.pdf][scale=625] % Found - OK
> \stoptext
> ----
>
> The 3rd call of 'test()' seems to not locate 'Kn.pdf' although the path was 
> altered by preceding \setupexternalfigures.
>
> How to modify the 'test()' to work properly even in the 3rd case?

Look at figres.setpath() in grph-inc.lua and search figures.paths and 
figures_paths to see how it is used.

Aditya

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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________