Hi
I am using iTextSharp to try to mix a MS Word generated PDF file with a
hyperlinked table of contents with other PDF files and ensure that the
hyperlinks in the original Word table of contents still work. When you take out
a page which the Word table of contents went to, you can see you get a null
link in the final PDF file.
I did get this to work by examining the PDF pages which I know contain the
table of contents, looking for “/Links” which have a “null” dest and then
adding a PdfAction.GotoLocalPage. The trouble is that it is really only
guessing (e.g. the first null link is probably the first file I inserted, the
second null link is probably the second file, etc). It works but only if every
table of contents entry is on single line... if a Word table of contents entry
is split over more than one line then each line is a separate link in the PDF
file. So a long entry in a table of contents translates as several links,
voiding the guesswork.
Examining the final PDF file, the null table of contents links appear like this:
21 0 obj
<</F 4/Subtype/Link/BS<</W 0>>/Dest[null/XYZ 62 777 0]/StructParent
13/Rect[62.65 176.77 542.82 190.57]>>
endobj
22 0 obj
<</F 4/Subtype/Link/BS<</W 0>>/Dest[null/XYZ 62 777 0]/StructParent
14/Rect[62.65 162.97 539.5 176.77]>>
endobj
As far as I can see, there is no easy way of telling if that is two distinct
table of contents entries or just one split over two lines.
So I am now wondering if it possible to kind of ‘fake’ a page reference (which
I hope makes sense). I can get the page reference I want of a page from the
original Word saved PDF file, I can see it using
MsgBox(reader.GetPageOrigRef(topage).ToString) and this gives a reference such
as “31 0 R”
A working link from a Word table of contents in a PDF file looks like this:
11 0 obj
<</F 4/Subtype/Link/BS<</W 0>>/Dest[31 0 R/XYZ 62 777 0]/StructParent
3/Rect[91 314.76 539.5 328.56]>>
endobj
So what I want to do is to take out that page “31 0 R” from the Word generated
PDF file, insert a new PDF file at that location but ensure the link still
works. Is there any way to edit the page reference on the first page of the
file I am inserting and change it to “31 0 R”? So rather than GetPageOrigRef,
it would be something like SetPageRef. Or maybe by manipulating the dictionary
for the inserted file?
Many thanks (hope this e-mail isn’t too hard to follow)
Jay
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