I built a simple GUI for writing outlines to PDF files. The GUI only
permits to edit simple outlines: trees of bookmarks that each point to a
page in the document. (So, for example, other kind of actions triggered
by bookmarks is not supported.)
Now I would like to know, when I read a PDF file, if the outline it
contains has more information than I am able to store and display and
write back. (If so, I’d like to at least warn the user that overwriting
her file with my software after editing the outline might cause
information loss.) In particular, I’d like to be able to read back PDF
files whose outline have been written with my very software, as this is
safe.
Thus, my question is: can I ensure that a given PDDocumentOutline
contains only a simple outline (as defined above), and no other information?
Currently, given a PDDocument current and PDDocumentOutline pdOutline, I
get an Iterable<PDOutlineItem> children = pdOutline.children(), then for
each PDOutlineItem child I use child.findDestinationPage(current) (where
current is the document I am processing). If findDestinationPage returns
null I know I am facing a non-simple outline. This goes on recursively.
Assuming this procedure never returns null on any findDestinationPage
call, can I deduce that the document outline is simple (as defined above)?
Olivier
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