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Posted to dev@pdfbox.apache.org by "Ben McCann (JIRA)" <ji...@apache.org> on 2015/09/26 04:15:04 UTC

[jira] [Comment Edited] (PDFBOX-2423) Page tree handling needs rewriting

    [ https://issues.apache.org/jira/browse/PDFBOX-2423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14908987#comment-14908987 ] 

Ben McCann edited comment on PDFBOX-2423 at 9/26/15 2:14 AM:
-------------------------------------------------------------

It seems that to get Transparency_group_rewrite3.patch in we're going to have to manually reapply it because it's really difficult to apply against the latest trunk. I've submitted patches that split that up and make many of the cleanup changes so that the remaining changes in Transparency_group_rewrite3.patch are much smaller and will contain just the meaty stuff.

See https://issues.apache.org/jira/browse/PDFBOX-2993 and https://issues.apache.org/jira/browse/PDFBOX-2994


was (Author: chengas123):
It seems that to get Transparency_group_rewrite3.patch in we're going to have to manually reapply it because it's really difficult to apply against the latest trunk. I've submitted a patch for the first part of that which simply introduces PDTransparencyGroup for better readability. See https://issues.apache.org/jira/browse/PDFBOX-2993

> 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: 025957.pdf, 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, Transparency_group_rewrite3.patch, asy-functionshading.pdf-1.png, asy-functionshading.pdf-1.png-diff.png, bugzilla869140.pdf, example_026.pdf-1.png, gs-bugilla691763.pdf, gs-bugzilla688601.pdf, gs-bugzilla689518.pdf, gs-bugzilla690467.pdf, gs-bugzilla693322.pdf, gs-bugzilla694385.pdf, jagpdf_doc_patterns.pdf, samsung_galaxy_s_4_um-p1.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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