Re: [NTG-context] Clipping multiple PDFs

23 Aug 2022


      On Mon, 22 Aug 2022, Jethro Djan via ntg-context wrote:
...

Thanks for the solution Pablo. It works well.
I wanted to add more pdfs (which also has many pages) and found it was easier for me to reason in the lua side of things. This is what I have at the moment:
\starttext
\startluacode
  local function doc(fil)
    return fil..[[.pdf]]
  end
local function disppdf(fname)
    n = 1 
    repeat 
      context.externalfigure({fname},{
        page = n,
        width = "200mm",
        scale = "950"
      })
      n = n + 1
    until n == context(context.noffigurepages)
  end
local pdffiles = {"ass1", "ass2", "ass3", "ass4", "ass5", "ass6", "ass7", "ass8"}
  for index=1,#pdffiles do 
    local f = doc(pdffiles[index])
    context.getfiguredimensions({f})
    disppdf(pdffiles[index])
  end
\stopluacode
\stoptext
I didn’t know how to get an array (or indexed table or whatever you call it) in ConTeXt/Tex. My problem is now with context(context.noffigurepages). It doesn’t produce an integer so n is being compared to nil. Am I calling it wrong? All I want to do is call \noffigurepages from the lua side. Is there something I am missing?
For a more low-level interface to finding the number of pages, see:

https://adityam.github.io/context-blog/post/include-multi-page-pdf/

Aditya

Re: [NTG-context] Clipping multiple PDFs

Aditya Mahajan