From: Hans Hagen via ntg-context <ntg-context@ntg.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Cc: Hans Hagen <j.hagen@xs4all.nl>, Pablo Rodriguez <oinos@gmx.es>
Subject: Re: read PDF metadata from other file
Date: Sat, 11 Sep 2021 18:16:34 +0200 [thread overview]
Message-ID: <22239887-bae1-7a4d-9142-76c75ed54b6a@xs4all.nl> (raw)
In-Reply-To: <3282f33e-4601-eabd-d964-188884b504bf@gmx.es>
On 9/11/2021 2:35 PM, Pablo Rodriguez via ntg-context wrote:
> Dear list,
>
> I have the following sample:
>
> \starttext
> \setupinteraction
> [state=start,
> title={\cldcontext{pdfe.open("b.pdf").Info.Title}}]
> \null
> \stoptext
>
> From a document composed with \insertpages, I need to transfer medatada.
>
> But I get the raw value "feff0061" (which I guess it may be introduced
> by lpdf.pdfunicode).
>
> How can I get the pure text value, so I can transfer metadata from one
> PDF document into another PDF document?
just use the better interface
\starttext
\startluacode
function document.whatever(name)
local p = lpdf.epdf.load(name)
context(p.Info.Title)
lpdf.epdf.unload(p)
end
\stopluacode
and/or use the converter (but still you need to close the file)
\setupinteraction
[state=start,
% title=\cldcontext{lpdf.fromsixteen(pdfe.open("b.pdf").Info.Title)},
title={\ctxlua{document.whatever("b.pdf")}}]
%\cldcontext{lpdf.fromsixteen(pdfe.open("b.pdf").Info.Title)}
\ctxlua{document.whatever("b.pdf")}
\stoptext
after which you enter wiki mode
Hans
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next prev parent reply other threads:[~2021-09-11 16:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-11 12:35 Pablo Rodriguez via ntg-context
2021-09-11 16:16 ` Hans Hagen via ntg-context [this message]
2021-09-11 18:54 ` Pablo Rodriguez via ntg-context
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