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From "John Hewson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-2423) Page tree handling needs rewriting
Date Sun, 02 Nov 2014 19:53:34 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-2423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14193979#comment-14193979
] 

John Hewson commented on PDFBOX-2423:
-------------------------------------

{quote}
PDFBOX-994 and PDFBOX-2103.pdf are still incorrect, and I tested both with a "clean" build
directly from the repository.
{quote}

I'm on JDK 6, I just tried this on JDK 7 and it's incorrect, I presume that's the problem.
Hmm...

> Page tree handling needs rewriting
> ----------------------------------
>
>                 Key: PDFBOX-2423
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2423
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: PDModel
>    Affects Versions: 1.8.7, 2.0.0
>            Reporter: John Hewson
>            Assignee: John Hewson
>            Priority: Blocker
>             Fix For: 2.0.0
>
>         Attachments: 26101_Colors.ai-1.png, 26101_Colors.ai-1.png-diff.png, Basiswissen-Vorschriften.pdf-3.png,
Basiswissen-Vorschriften.pdf-3.png-diff.png, Basiswissen-Vorschriften.pdf-4.png, Basiswissen-Vorschriften.pdf-4.png-diff.png,
PDFBOX-1058.pdf-1.png, PDFBOX-1058.pdf-1.png-diff.png, PDFBOX-1058.pdf-4.png, PDFBOX-1058.pdf-4.png-diff.png,
PDFBOX-1094-tiling_pattern.pdf, PDFBOX-1711-cmyk.pdf-1.png, PDFBOX-1711-cmyk.pdf-1.png-diff.png,
PDFBOX-1794-vattenfall.pdf-1.png, PDFBOX-1794-vattenfall.pdf-1.png-diff.png, PDFBOX-1917.pdf-1.png,
PDFBOX-1917.pdf-1.png-diff.png, asy-functionshading.pdf-1.png, asy-functionshading.pdf-1.png-diff.png,
bugzilla869140.pdf, example_026.pdf-1.png, gs-bugzilla694385.pdf, jagpdf_doc_patterns.pdf
>
>
> The way in which PDFBox handles the Page tree needs to be rewritten, preferably from
scratch. Currently the document catalog returns the raw objects from the page tree, wrapped
in either a PDPage or PDPageNode.
> We need to abstract over the page tree and get rid of PDPageNode, we should provide methods
which can add/remove PDPage objects *only*. The existing low-level access to the page tree
is not needed at the PD-level.
> Inheritance of page properties such as crop box, resources, and rotation should be reimplemented
to use whatever new page tree abstraction we invent. We can finally remove the old broken
methods which didn't look up the inheritance tree when retrieving these values.



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