Oleg Sydorenko created FOP-2819:
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Summary: Fop is not rendering last page if width of page is not
the same as previous page
Key: FOP-2819
URL: https://issues.apache.org/jira/browse/FOP-2819
Project: FOP
Issue Type: Bug
Components: fo/page
Affects Versions: 2.3
Environment: java 8. Embedded Fop from java application. Windows 10.
FOP 2.3
Reporter: Oleg Sydorenko
Attachments: actual.pdf, expected.pdf, incorrect two page.fo,
workaround.fo
During rendering pdf with content that fits entirely to body region page
breaking algorithm incorrectly defines necessity of rendering of last page. If
region-after does not fit to layout entirely after body region that last page
is not rendered if width of last page simple page master differs from width of
only page simple page master.
As I understood, in versions 2.0-2.2 it tries to define the last page presence
but because of content of body region was at one page it just renders only page
layout with hiding all element from body that after static region overflows.
In version 2.3 it was fixed by change commited for FOP-2713 bug by simon steiner
However it not handles situation for pages with different width. We are
generate pdf with different width for some of our functionality but we couldn't
manage to render it correctly for case when body region is slightly bigger to
be fitted to one page layout(only) but smaller to be rendered for two pages
layouts. As a workaround we now use the max of the size for both pages.
It would be great if you fix this behavior in next releases.
As I understood the problem is in PageBreaker#redoLayout method. On line
number 470
we are getting
boolean ipdChange = algRestart.getIPDdifference() != 0;
this variable is true for situation when pages have different width and it
defines later on on line 478 do we adding last page or not. If width of last
page simple page master is different than other simple page masters width than
last page is not rendered because of it.
I haven't figured out the all dependencies but I think that algorithm that
breaks pages is not expecting about possibility of existence of pages with
different width.
I haven't managed to render two page pdf using binary fop. Maybe it because of
fonts missing or hyphenation files missing settings. I hope that you will
succeed with it.
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