On Sep 29, 2006, at 09:56, Igor Istomin wrote:
Hi Igor,
<snip />
> Maybe you could use the Intermediate Format (*) for this?
> Render the area tree to XML, perform the computations/transform the
> attributes via XSLT, and finally render the altered area tree to
PDF.
Thanks for this idea. I consider this solution as alternative. The
problem
is that an input document can be huge and it seems not rational to
process
the whole document to modify page header/footer only.
You could be right, but I just realized that I haven't asked more
info about why precisely you need to modify the header/footer... It
would probably help a lot if you could explain this a bit more.
Are you absolutely certain that your issue can't be solved purely in
XSL-FO?
If yes, is it the same adjustment for all pages? Do you need the
entire document contents to determine how much adjustment you need?
Maybe it's possible to render only the first few pages (or the first
page-sequence)?
Besides that, it does not necessarily mean processing the whole
document twice, but rather, perform part of the processing, then dump
the area tree to XML, modify that, and finally continue the process
(?) At least you'll skip the layout-phase the second time around
(unless you need to merge information from the area tree with the
original FO).
Note the remark all the way at the bottom of the page about the
Intermediate Format: you don't really need to write the XML to an
output file.
Cheers,
Andreas
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