tdf#91083 ww8import: set table keep/split properties if emulated

This applies primarily to multi-row tables.  (Single row tables handle
don't-split emulation differently).

Since .doc doesn't have table options to "don't split table"
and "keep with next paragraph", we emulated that and now we detect
the emulation and tick those settings again.

Change-Id: Ie923195610aeb72927c9d75276ebf92e48969e6e
Reviewed-on: https://gerrit.libreoffice.org/28423Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Justin Luth <justin_luth@sil.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

sw/qa/extras/ww8export/ww8export.cxx

@@ -701,9 +701,39 @@ DECLARE_WW8EXPORT_TEST(testTableKeep, "tdf91083.odt")
     //emulate table "keep with next" -do not split table
     CPPUNIT_ASSERT_EQUAL( OUString("Row 1"), parseDump("/root/page[3]/body/tab[1]/row[2]/cell[1]/txt[1]") );
     CPPUNIT_ASSERT_EQUAL( OUString("Row 1"), parseDump("/root/page[6]/body/tab[1]/row[2]/cell[1]/txt[1]") );
+
+    // detect and re-enable keep-with-next and dont-split-table settings
+    uno::Reference<text::XTextTablesSupplier> xTablesSupplier(mxComponent, uno::UNO_QUERY);
+    uno::Reference<container::XIndexAccess> xTables(xTablesSupplier->getTextTables(), uno::UNO_QUERY);
+    uno::Reference<text::XTextTable> xTable (xTables->getByIndex(0), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(false, getProperty<bool>(xTable, "Split"));
 }
 #endif
 
+DECLARE_WW8EXPORT_TEST(testTdf91083_tableKeep, "tdf91083_tableKeep.doc")
+{
+    // detect and re-enable keep-with-next and dont-split-table settings
+    uno::Reference<text::XTextTablesSupplier> xTablesSupplier(mxComponent, uno::UNO_QUERY);
+    uno::Reference<container::XIndexAccess> xTables(xTablesSupplier->getTextTables(), uno::UNO_QUERY);
+
+    // single-row table - kept with next
+    uno::Reference<text::XTextTable> xTable (xTables->getByIndex(0), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(false, getProperty<bool>(xTable, "Split"));
+    // I don't know how to test for SvxFormatKeepItem
+
+    // complex table - kept with next
+    xTables->getByIndex(1) >>= xTable;
+    CPPUNIT_ASSERT_EQUAL(false, getProperty<bool>(xTable, "Split"));
+
+    //single row table - do not split
+    xTables->getByIndex(3) >>= xTable;
+    CPPUNIT_ASSERT_EQUAL(false, getProperty<bool>(xTable, "Split"));
+
+    //multi-row table - do not split
+    xTables->getByIndex(4) >>= xTable;
+    CPPUNIT_ASSERT_EQUAL(false, getProperty<bool>(xTable, "Split"));
+}
+
 DECLARE_WW8EXPORT_TEST(testMoveRange, "fdo66304-1.odt")
 {
     //the save must survive without asserting

sw/source/filter/ww8/ww8par2.cxx

@@ -2727,6 +2727,60 @@ void WW8TabDesc::FinishSwTable()
         pIo->m_pFormatOfJustInsertedApo = nullptr;
         m_MergeGroups.clear();
     }
+
+    // since Word formats don't have table "keep with next paragraph" and "don't split table" settings,
+    // they were emulated in MSWordExportBase::OutputTextNode. Now we need to re-create those settings, reversing that logic.
+    // bKeep: if first paragraph of EVERY row is marked keep-with-next (implies bDontSplit).
+    bool bKeep = true;
+    // bDontSplit table: if first paragraph of every row EXCEPT the last one is kept.
+    bool bDontSplit = false;
+    sal_uInt32 nRow=0;
+    std::vector< SwTextNode* > vEmulatedNodes;
+    while( bKeep && nRow < pTabLines->size() )
+    {
+        const SwTableLine* pIterTableRow = (*pTabLines)[ nRow ];
+        const SwTableBoxes& rIterTableBoxes = pIterTableRow->GetTabBoxes();
+        const SwTableBox* pIterFirstCell = rIterTableBoxes.empty() ? nullptr : rIterTableBoxes.front();
+        // only for non-complex tables
+        if( pIterFirstCell && !pIterTableRow->GetUpper() )
+        {
+            // check the first paragraph from each row
+            SwPaM aPam( *pIterFirstCell->GetSttNd(), 0 );
+            aPam.GetPoint()->nNode++;
+            SwNode & rNode = aPam.GetPoint()->nNode.GetNode();
+            SwTextNode* pFirstParagraphNode = nullptr;
+            if( rNode.IsTextNode() )
+                pFirstParagraphNode = rNode.GetTextNode();
+
+            if( pFirstParagraphNode )
+            {
+                if( !pFirstParagraphNode->GetSwAttrSet().GetKeep().GetValue() )
+                    bKeep = false;
+                // all rows except the last one have been kept
+                else if ( nRow == pTabLines->size() - 2 )
+                    bDontSplit = true;
+
+                // save the node, so the paragraph's keep-with-next-paragraph setting can be removed later if it was added for the emulation
+                vEmulatedNodes.push_back( pFirstParagraphNode );
+            }
+        }
+        ++nRow;
+    }
+
+    if( bDontSplit || (bKeep && !vEmulatedNodes.empty()) )
+    {
+        // clear the emulated row's paragraph property
+        while( !vEmulatedNodes.empty() )
+        {
+            vEmulatedNodes.back()->ResetAttr( RES_KEEP );
+            vEmulatedNodes.pop_back();
+        }
+
+        // Set the table properties
+        pTable->GetFrameFormat()->SetFormatAttr(SwFormatLayoutSplit( false ));
+        if( bKeep )
+            pTable->GetFrameFormat()->SetFormatAttr(SvxFormatKeepItem( true, RES_KEEP ));
+    }
 }
 
 // browse m_MergeGroups, detect the index of the first fitting group or -1 otherwise