sw: layout: SwFlyNotify should invalidate a content or tab frame

The problem happens during layout for a temporary mail merge document,
but that is probably incidental. (The SwRootFrame is the 2nd one out of
3 being createed, the one for the target document.)

The problem is that a text frame with a fly moves backward, and
~SwFlyNotify() invalidates the position of the next frame, but the next
frame is a section frame, and this does not encourage the text frame
inside the section frame to move backward at a later time, which leads
to general user unhappiness.

So invalidate the lower of the section frame too.

Change-Id: I14fa20a279979c029c468f5c6f2e5ecad4ccd240
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107360
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
(cherry picked from commit c797fc768152a57f6cc7fb9dd447138e4b0629ee)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107311
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

1 files changed, 8 insertions, 1 deletions

diff --git a/sw/source/core/layout/frmtool.cxx b/sw/source/core/layout/frmtool.cxx
index 295000c0aa64..ed8a46259f79 100644
--- a/sw/source/core/layout/frmtool.cxx
+++ b/sw/source/core/layout/frmtool.cxx
@@ -678,9 +678,16 @@ SwFlyNotify::~SwFlyNotify()
         if ( pFly->IsFlyAtContentFrame() )
         {
             SwFrame *pNxt = pFly->AnchorFrame()->FindNext();
-            if ( pNxt )
+            while (pNxt)
             {
                 pNxt->InvalidatePos();
+                if (!pNxt->IsSctFrame())
+                {
+                    break;
+                }
+                // invalidating pos of a section frame doesn't have much
+                // effect, so try again with its lower
+                pNxt = static_cast<SwSectionFrame*>(pNxt)->Lower();
             }
         }