Hi Thibaut,
You work could probably be integrated as part of the Multipage export feature.
See 
http://incubator.myxwiki.org/xwiki/bin/view/Improvements/MultiExport
Check for example the PDF export options on
http://incubator.myxwiki.org/xwiki/bin/view/Improvements/MultiExport2Propos…
Thanks
-Vincent
On Jan 27, 2011, at 11:47 PM, Thibaut Camberlin wrote:
  Hi,
 I was writing a piece of code so that PDF export prints associated meta data
 of a page. Since I was in PDF macros code, I worked on a PDF export options
 page.
 By working on the PDF export options, I am using check boxes that allows
 user to choose to export or not cover page, toc page, metadata page
 attachments and comments. Issue I encountered is that when a check box is
 not checked it is not set and I found no way to use check boxes with actual
 code from pdfhtmlheader.vm page:
 #if("$!request.pdfcover" != '0')
  #set($displayPdfCover = 1)
 #else
  #set($displayPdfCover = 0)
 #end
 and the same for pdftoc
 (I could have put <input value="0"/> instead but it makes more sense to
have
 <input value="1"/>)
 Therefore I am proposing that we:
 * update pdfhtmlheader.vm page so that cover and toc page are not exported
 by default
 * update existing pdf export button so that we keep the same behaviour
 (pdfcover and pdftoc printed in PDF), meaning instead of
 *page?format=pdf*it would be
 *page?format=pdf&pdftoc=1&pdfcover=1*
 Some UI will be needed afterward so that this page is exposed. (I am not
 planning to work on this.)
 The export options would be made in a template, but I put the code in this
 page of the incubator so that it makes things clearer if needed:
 
http://incubator.myxwiki.org/xwiki/bin/view/PDFExport/ExportOptions
 Thanks for your feedback on pdfhtmlheader.vm modification and on the feature
 itself.
 --
 Thibaut