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https://issues.apache.org/jira/browse/FOP-1840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13530948#comment-13530948
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Alexios Giotis commented on FOP-1840:
-------------------------------------
Luis & Robert thank you for your quick replies & patch. Related to the need to
have span="all", you are of course correct...
Related to the balance-4.fo, it was confusing as I put too many spans. I am
attaching balance-5.fo which contains two span="all", one after each table. In
the balance-4-edited.fo.xml, the result was the expected but by removing the
first table. Actually, by just changing by 1mm, the margin-top="206mm", this
problem goes away. I am not sure if this is related to the balancing algorithm
or to roundings.
> [PATCH] Region-Body Column balancing incorrect if content is table with header
> ------------------------------------------------------------------------------
>
> Key: FOP-1840
> URL: https://issues.apache.org/jira/browse/FOP-1840
> Project: Fop
> Issue Type: Improvement
> Components: page-master/layout
> Affects Versions: 1.0
> Environment: Operating System: All
> Platform: PC
> Reporter: a.kovacs
> Assignee: fop-dev
> Attachments: b49801_dirty_hack.patch, b49801.fo,
> balance-2-expected.pdf, balance-2.fo, balance-2.pdf, balance-3.fo.xml,
> balance-4-edited.fo.xml, balance-4.fo.xml, balance-4-none.fo.xml,
> balance-4.pdf, balancing-fos.zip, fix.diff, fo.xml, patch.diff,
> test-after.pdf, test-before.pdf
>
>
> To reproduce bug please do the following:
> Use:
> <fo:region-body region-name="PageBody" column-count="2" />
> Fill the region-body with content like :
> <fo:block span="none" > ...(content is table with header) ..
> <fo:block span="all"> ... (one line (summary)) ..
> If the content is made of normal blocks the columns are balanced before the
> span="all" summary line.
> like:
> 123456 456789
> 234567 567890
> 345678 678901
> Summary: 1234567890
> If the content is a table without headers the columns are balanced correct.
> like:
> 123456 456789
> 234567 567890
> 345678 678901
> Summary: 1234567890
> If the content is a table with header the columns are not balanced correct.
> (the right one is shorter.)
> Header Header
> 123456 567890
> 234567 678901
> 345678
> 456789
> Summary: 1234567890
> The "computeDemerits()" algorithm is wrong in class
> "BalancingColumnBreakingAlgorithm".
> The "fullLen" value is to short. Exactly the replicated header width is
> missing. In the "par" list the header is contained only once although the
> header is displayed in every column. (in the example twice)
> Solution could be to place the header as many times in the "par" list as many
> columns exist, or to count the existing one header as many times as needed.
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