Re: [NTG-context] Pdf info with Lua/Ctx API

16 Aug 2017

      Hello Hans,

thank you for implementation 'figures.getinfo()'; two points:

1. Code:

----
\startluacode

local n = "x:/Users/MMi/Akce/I-6_Krusovice.DSP-ZDS/Admin/Jednani/2017-07-07-SU-Rakovnik/ZJ.pdf"
local d = figures.getinfo(n)
...
----

prints (probably to-string converted) resulting table:

"
close source    > level 3, order 8, name 'd://Lukas/ConTeXt/Styles/PxLetter.sty'
table={
  ["request"]={
   ["arguments"]=false,
   ["cache"]=false,
   ["color"]=false,
   ["controls"]=false,
   ["conversion"]=false,
   ["display"]=false,
   ["format"]=false,
   ["height"]=false,
   ["label"]=false,
   ["mask"]=false,
   ["name"]="x:/Users/MMi/Akce/I-6_Krusovice.DSP-ZDS/Admin/Jednani/2017-07-07-SU-Rakovnik/ZJ.pdf",
...
  },
  ["status"]={
...
  },
  ["used"]={
   ["colordepth"]=0,
   ["depth"]=0,
   ["format"]="pdf",
   ["fullname"]="x:/Users/MMi/Akce/I-6_Krusovice.DSP-ZDS/Admin/Jednani/2017-07-07-SU-Rakovnik/ZJ.pdf",
   ["height"]=55380991,
...
  },
}
"

- Is it intend? Or residual debugging status?

2. Is there a Ctx built-in converter which would convert width and height (e.g. here: ["height"]=55380991) from "height units" to milimeters?

Best regards,

Lukas

On Mon, 14 Aug 2017 16:55:09 +0200, Hans Hagen  wrote:
...
On 8/14/2017 1:08 PM, Procházka Lukáš Ing. wrote:
...
Hello,
is there a way how to get the following info from a PDF file via Lua/Ctx
API?:
- first: number of pages of the PDF,
- next: for each page: get width, height and orientation
(portrait/landscape) or rotation (+90,+ 180, +270 or so) of i-th page.
this probably has come up several times now, anyway
\getfiguredimensions[test.pdf]
\dorecurse {\noffigurepages} {
     \getfiguredimensions[test.pdf][page=#1]
     \figurenaturalwidth
,\figurenaturalheight,\figureorientation,\figurerotation\par
}
in lua you can either use the img library (see luatex manual) or context
helpers
local data = figures.push("foo.pdf")
         figures.identify()
         figures.check()
         figures.pop()
  inspect(data)
i'll add:
function figures.getinfo(name,page)
     if type(name) == "string" then
         name = { name = name, page = page }
     end
     if name.name then
         local data = figures.push(name)
         figures.identify()
         figures.check()
         figures.pop()
         return data
     end
end
so that one can do
local n = "ms.pdf"
local d = figures.getinfo(n)
if d then
     for i=1,d.used.pages do
         local p = figures.getinfo(n,i)
         if p then
             local u = p.used
             print(u.width,u.height,u.orientation)
         end
     end
end
etc etc
-- 
Ing. Lukáš Procházka | mailto:LPr@pontex.cz
Pontex s. r. o.      | mailto:pontex@pontex.cz | http://www.pontex.cz | IDDS:nrpt3sn
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