Seifeddine Dridi commented on FOP-2293:

I think I found a workaround, and it seems to be working seamlessly. In 
_AbstractLayoutManager.createChildLMs()_  I added a new test:

if (foNode instanceof MultiSwitch) {
        foNode = ((MultiSwitch) foNode).getCurrentlyVisibleNode();
if (foNode != null) {
        getPSLM().getLayoutManagerMaker().makeLayoutManagers(foNode, newLMs);

then in _MultiCaseLayoutManagerMaker_, I simply return the list of LMs of the 
children of the multi-case, presumably they are valid children of the parent of 
the multi-switch. However, this doesn't solve the case where the best-fit 
extension is enabled, since the set of multi-case(s) have to be evaluated by 
_BestFitLayoutManager_. Any ideas?


> Whitespace management extension
> -------------------------------
>                 Key: FOP-2293
>                 URL: https://issues.apache.org/jira/browse/FOP-2293
>             Project: Fop
>          Issue Type: New Feature
>          Components: general
>    Affects Versions: trunk
>            Reporter: Seifeddine Dridi
>            Priority: Minor
>              Labels: XSL-FO
>             Fix For: trunk
>         Attachments: bestfit.fo, doc.pdf, FO_multi-switch_test.fo, 
> FO_multi-switch_with_best-fit_extension.patch, multiple-feasible-nodes.fo, 
> multi-switch_bestfit.fo, patch.patch, patch-rev1.1.patch, patch-rev1.patch, 
> patch-rev2.patch
> I have been working on an extension for whitespace management, similar to 
> what's described here: 
> http://wiki.apache.org/xmlgraphics-fop/WhitespaceManagement
> The logic of the extension is very simple: the user defines a set of 
> alternatives that he wishes to insert at the end of a page, then if there is 
> enough space left, FOP will pick the alternative that best matches the user's 
> selection criteria (first fit, smallest fit, biggest fit).
> This is my first work on FOP and it took me almost 2 months to reach this 
> stage in development. But it's not the end of course, so I'm relying on your 
> feedback to improve it.
> Thank you

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