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https://issues.apache.org/jira/browse/FOP-1760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16446942#comment-16446942
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Jan Tošovský commented on FOP-1760:
-----------------------------------
Patches can be created using the description at
[https://xmlgraphics.apache.org/fop/dev/tools.html#patches
|https://xmlgraphics.apache.org/fop/dev/tools.html#patches] - I personally use
Tortoise SVN and all my patches here were created this way. Once uploaded, I
can test it on my updated local SVN copy. If everything works, we can ask again
some commiter to include it. From my POV it is better to discuss these things
on public DEV mailing list.
> [PATCH] FOP doesn't support change bar generation
> -------------------------------------------------
>
> Key: FOP-1760
> URL: https://issues.apache.org/jira/browse/FOP-1760
> Project: FOP
> Issue Type: New Feature
> Components: unqualified
> Affects Versions: trunk
> Environment: Operating System: All
> Platform: All
> Reporter: Stephan Thesing
> Priority: Blocker
> Attachments: change-bars.fo, change_bars_diff.txt, changebar.diff,
> changebar_20110308.diff, changebars.fo, changebars.pdf,
> changebars_20110512.diff, diff_1691612.diff, diff_2010_03_06.txt,
> fop_20120507.diff, fop_changebars_20120506.diff,
> patch_against_rev_1686494_2015-06-19.patch,
> patch_against_rev_1690781_2015-07-19.patch,
> patch_against_rev_1755460_2016-08-07.patch,
> patch_against_rev_1776640_2016-12-30.patch, test.fo, test.pdf
>
>
> In order to produce change bars along the columns for changed contents,
> FO supports the fo:change-bar-begin and fo:change-bar-end elements.
> These are not supported by FOP.
> Support for change bars should be added.
> Effort needed
> - add parsing and validation of fo: elements
> - determine fo elements under influence of one or more change bars
> - when creating areas from such affected fo elements, create additional areas
> representing the change bars as defined in the FO standard.
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