[Libreoffice-bugs] [Bug 134109] New: Flickering Layout with tables in hidden section and following tables

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=134109

            Bug ID: 134109
           Summary: Flickering Layout with tables in hidden section and
                    following tables
           Product: LibreOffice
           Version: 6.4.4.2 release
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: his at 9tw.de
                CC: lustig at his.de

Created attachment 162164
  --> https://bugs.documentfoundation.org/attachment.cgi?id=162164&action=edit
ODT showing flicker effect after hiding Section Hidden

We are using LibreOffice UNO-API as a Report Engine and create "Templates" for
Mass Reporting in LibreOffice.

One heavily used feature is to hide Section, based on an expression (we replace
that in content.xml upon generation.)

When a specific configuration of elements occure, the reszulting odt shows a
never ending flicker effect on the following tables containing tables. Previous
tables are not affected.

We managed to confine the problematic constellation to this bits:

* Field "Page Count" is anywhere on the page.
* A Hidden Section, containing a table with >=40 Cells is anywhere on the page
* An table contains another table, is following the Hidden Section somewhere on
the following few pages.

Removing or changing any of this constellation is also removing the effect.

The fun began when I also placed a protected section with table containing a
table after the hidden section.

This stopps the flickering effect after a while, the protected Section will
grow to and the containing tables will be placed on page 4.

When adding more cells to the table in the hidden section, the protected
Section will grow even further, pumping up the pagecount.

To reproduce the bug, simply hide the Section named "Hidden" in the attached
file.

We were able to reproduced this behavior with Versions 6.0.7, 6.3.5 and 6.4.4.2
on Windows and Linux.

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