[Dev-luatex] pdf.obj() removes leading white space
Hans Hagen
pragma at wxs.nl
Sat Mar 8 12:45:07 CET 2014
On 3/8/2014 1:46 AM, Reinhard Kotucha wrote:
> Hi,
> I'm currently trying to insert XMP metadata into a PDF file in order
> to make it PDF/A compliant.
>
> The XML stuff is a Lua string and I'm using pdf.obj() in order to
> create the object. However, leading whitespace is renoved by
> pdf.obj(). As far as the XML stuff is concerned, it's not a big
> problem if indentation gets lost because XML parsers ignore it anyway.
>
> However, I have to add about 2..4 kB of padding and all validators
> insist on space characters (0x20). This padding is important because
> it allows content management systems to extend the XML stuff without
> the need to re-generate the xref table.
>
> After all, I would expect that pdf.obj() allows to insert even binary
> stuff because PDF objects can contain anything. Hence I assume that
> the current behavior is not desired.
>
> I didn't try pdf.immediateobj() yet but I fear that it's affected too.
this works quite ok
local s = [[
<foo>
<bar>
some crap
</bar>
</foo>
]]
pdf.refobj(pdf.obj("stream",s))
pdf.immediateobj(s)
of course if you embed that kind of lua code in a tex file then you have
to make sure that you use a catcode regime that retains spaces ..
Hans
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