tdf#156724 tdf#156722 tdf#156745 sw: layout: partially remove IsPaintLocked()

Having the layout algorithm dependend on IsPaintLocked() is very
problematic; it is typically set when the layout is invoked from
SwViewShell code, as happens several times when loading a document in
response to window resize events etc., but not for idle formatting or
from SwXTextDocument::getRendererCount(), hence these bugs only
reproduce with soffice --convert-to pdf, not via UI.

For tdf#156724 the problem is that the table is split, during formatting
of the split row a new footnote is created on page 1, and this reduces
the space, so splitting fails and is never attempted again.

When the document is loaded from UI, when the table is split the
footnote already exists and so splitting succeeds; it was created by
a call from SwLayAction::FormatLayout() of the cell frame.

It turns out that when the condition is removed completely, testUXTSOREL
will take 5 minutes instead of 5 seconds, which seems excessive; the
problem there appears to be that a text frame in a columned section
moves forward and backward; plausibly columned section content should be
formatted by ::CalcContent() only.

(reportedly regression from commit c605283ad6785dea762feab5fdffd9d27e75c292 and commit
7e8b4756d95057f069467b34e7849f9354856578)

Change-Id: I9ed73588efeec654a769eee8aa825186bd51e059
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/155672
Tested-by: Michael Stahl <michael.stahl@allotropia.de>
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>

3 files changed, 34 insertions, 3 deletions

diff --git a/sw/qa/extras/layout/data/fdo56797-2-min.odt b/sw/qa/extras/layout/data/fdo56797-2-min.odt
new file mode 100644
index 000000000000..624149ec0248
--- /dev/null
+++ b/sw/qa/extras/layout/data/fdo56797-2-min.odt
diff --git a/sw/qa/extras/layout/layout3.cxx b/sw/qa/extras/layout/layout3.cxx
index f26a6af25abf..9e47f435df94 100644
--- a/sw/qa/extras/layout/layout3.cxx
+++ b/sw/qa/extras/layout/layout3.cxx
@@ -1176,6 +1176,37 @@ CPPUNIT_TEST_FIXTURE(SwLayoutWriter3, testTdf128399)
     CPPUNIT_ASSERT_EQUAL(nExpected, aPosition.GetNodeIndex());
 }
 
+CPPUNIT_TEST_FIXTURE(SwLayoutWriter3, testTdf156724)
+{
+    discardDumpedLayout();
+    if (mxComponent.is())
+        mxComponent->dispose();
+
+    OUString const url(createFileURL(u"fdo56797-2-min.odt"));
+
+    // note: must set Hidden property, so that SfxFrameViewWindow_Impl::Resize()
+    // does *not* forward initial VCL Window Resize and thereby triggers a
+    // layout which does not happen on soffice --convert-to pdf.
+    std::vector<beans::PropertyValue> aFilterOptions = {
+        { beans::PropertyValue("Hidden", -1, uno::Any(true), beans::PropertyState_DIRECT_VALUE) },
+    };
+
+    // inline the loading because currently properties can't be passed...
+    mxComponent = loadFromDesktop(url, "com.sun.star.text.TextDocument",
+                                  comphelper::containerToSequence(aFilterOptions));
+    save("writer_pdf_Export");
+
+    xmlDocUniquePtr pXmlDoc = parseLayoutDump();
+    // both pages have a tab frame and one footnote
+    assertXPath(pXmlDoc, "/root/page[1]/body/tab", 1);
+    assertXPath(pXmlDoc, "/root/page[1]/ftncont", 1);
+    assertXPath(pXmlDoc, "/root/page[1]/ftncont/ftn", 1);
+    assertXPath(pXmlDoc, "/root/page[2]/body/tab", 1);
+    assertXPath(pXmlDoc, "/root/page[2]/ftncont", 1);
+    assertXPath(pXmlDoc, "/root/page[2]/ftncont/ftn", 1);
+    assertXPath(pXmlDoc, "/root/page", 2);
+}
+
 CPPUNIT_TEST_FIXTURE(SwLayoutWriter3, testTdf145826)
 {
     createSwDoc("tdf145826.odt");
diff --git a/sw/source/core/layout/layact.cxx b/sw/source/core/layout/layact.cxx
index ecce180eb336..af93ab796ff6 100644
--- a/sw/source/core/layout/layact.cxx
+++ b/sw/source/core/layout/layact.cxx
@@ -1431,10 +1431,10 @@ bool SwLayAction::FormatLayout( OutputDevice *pRenderContext, SwLayoutFrame *pLa
                 PopFormatLayout();
             }
         }
-        else if ( m_pImp->GetShell()->IsPaintLocked() )
-            // Shortcut to minimize the cycles. With Lock, the
-            // paint is coming either way (primarily for browse)
+        else if (m_pImp->GetShell()->IsPaintLocked() || !pLay->IsColBodyFrame())
+        {   // tdf#156724 unconditionally for frames in tables, so their footnotes exist before trying to split
             pLow->OptCalc();
+        }
 
         if ( IsAgain() )
             return false;