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From Gilad Denneboom <gilad.denneb...@gmail.com>
Subject Re: PDPageDestination off by one
Date Mon, 04 May 2015 12:09:02 GMT
PDF pages (like almost anything else in arrays or lists) are 0-based. That
means that 0 refers to the first item, 1 to the second one, etc. So PDF
page #2 refers to the third physical page in the document.
Acrobat is a user-facing application so it uses the more conventional
1-based way of referring to the these items, so the first page in a
document is #1, the second page is #2, etc.
This is something you always have to keep in mind when switching between a
development environment and a user environment.

On Mon, May 4, 2015 at 1:26 PM, Johanneke Lamberink <
johanneke.lamberink@onior.com> wrote:

> Hi,
> In my project I am exporting bookmarks from a PDF to an XML file, and at
> another stage importing the bookmarks from the XML file into the PDF. In
> doing this I've noticed an issue with the index of the page returned by the
> PDPageDestination methods.
> My situation is as follows:
> I have a PDF with a bookmark on the second page. That bookmark is
> represented by a PDOutlineItem with a PDActionGoTo and a PDPageDestination.
> Calling PDPageDestination.findPageNumber() on the bookmark's destination
> results in the integer 2. So far so good. I write to my XML file that the
> bookmark is on page 2.
> When reading the XML, I create a new PDGoTo action with a
> PDPageDestination. This PDPageDestination receives an array with the
> integer 2 as the first element.
> When I ask this new PDPageDestination for its pagenumber, using
> PDPageDestination.findPageNumber(), I receive 2. Since this is the same
> code I used to determine the bookmarked page in the first place, I would
> expect the bookmark to be made for the correct page at this point.
> However, when I open the PDF in Adobe Acrobat Pro and inspect the
> bookmark, it says the page destination is 3! When going to the bookmark
> destination, I end up on the third page of the PDF.
> Is this a bug in PDFBox? And does anyone have a solution on how to fix
> this?
> Kind regards,
> Johanneke Lamberink

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