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https://issues.apache.org/jira/browse/FOP-3141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jan Tošovský updated FOP-3141:
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Attachment: bottom.fo
bottom_current.pdf
bottom_expected.pdf
> Auto-calculating top/left positions based on bottom/right when height/width
> is provided
> ---------------------------------------------------------------------------------------
>
> Key: FOP-3141
> URL: https://issues.apache.org/jira/browse/FOP-3141
> Project: FOP
> Issue Type: Improvement
> Components: layout/block
> Affects Versions: 2.8
> Reporter: Jan Tošovský
> Priority: Minor
> Attachments: bottom.fo, bottom_current.pdf, bottom_expected.pdf
>
>
> When the block container is to be placed on the bottom edge, it is necessary
> to specify the top position even if the bottom and height attributes are
> specified (so the top position could be auto-calculated).
> I actually try generating some FO files originally designed for XEP, but for
> FOP I have to tweak all these top positions. It is straightforward, but I am
> losing the original semantics (top="18.8cm" instead of more clear bottom="0").
> I could locate the possible place for tweaking:
> [https://github.com/apache/xmlgraphics-fop/blob/main/fop-core/src/main/java/org/apache/fop/fo/properties/CommonRelativePosition.java]
> In the constructor, if the top is zero, but both the bottom and the height
> are non-zero, the top could be calculated. Same for the left and right +
> width).
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