tdf#134606 DOCX table import: fix gridBefore + nesting

Nested tables in a table row with gridBefore could
result of broken outer table, if the row doesn't contain
text before the nested table, resulting invalid
TextRange for insertion of gridBefore cells.

Regression from commit 70274f86cdc1c023ffdd0130c262c1479262d76b
(tdf#116194 DOCX import: fix missing tables with w:gridBefore)

Change-Id: I6bb3948b6522d8785a1ea0ccf8d7c7f3c2bde189
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/98320
Tested-by: Jenkins
Reviewed-by: László Németh <nemeth@numbertext.org>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/99604
Tested-by: Gabor Kelemen <kelemen.gabor2@nisz.hu>
Reviewed-by: Gabor Kelemen <kelemen.gabor2@nisz.hu>

3 files changed, 37 insertions, 15 deletions

diff --git a/sw/qa/extras/ooxmlexport/data/tdf134606.docx b/sw/qa/extras/ooxmlexport/data/tdf134606.docx
new file mode 100644
index 000000000000..c5b95cef3236
--- /dev/null
+++ b/sw/qa/extras/ooxmlexport/data/tdf134606.docx
diff --git a/sw/qa/extras/ooxmlexport/ooxmlexport10.cxx b/sw/qa/extras/ooxmlexport/ooxmlexport10.cxx
index ceb397b23388..6fbcbaaeeccc 100644
--- a/sw/qa/extras/ooxmlexport/ooxmlexport10.cxx
+++ b/sw/qa/extras/ooxmlexport/ooxmlexport10.cxx
@@ -623,6 +623,13 @@ DECLARE_OOXMLEXPORT_TEST(testTdf116194, "tdf116194.docx")
     assertXPath(pXmlDoc, "/w:document/w:body/w:tbl", 2);
 }
 
+DECLARE_OOXMLEXPORT_EXPORTONLY_TEST(testTdf134606, "tdf134606.docx")
+{
+    // The problem was that the importer lost the nested table structure with w:gridBefore
+    xmlDocPtr pXmlDoc = parseExport();
+    assertXPath(pXmlDoc, "/w:document/w:body/w:tbl/w:tr/w:tc/w:tbl");
+}
+
 DECLARE_OOXMLEXPORT_TEST(testMsoBrightnessContrast, "msobrightnesscontrast.docx")
 {
     uno::Reference<text::XTextDocument> textDocument(mxComponent, uno::UNO_QUERY);
diff --git a/writerfilter/source/dmapper/TableManager.cxx b/writerfilter/source/dmapper/TableManager.cxx
index 97e872f7f9b1..596d036a506a 100644
--- a/writerfilter/source/dmapper/TableManager.cxx
+++ b/writerfilter/source/dmapper/TableManager.cxx
@@ -425,23 +425,38 @@ void TableManager::endRow()
     TableData::Pointer_t pTableData = mTableDataStack.top();
 
     // Add borderless w:gridBefore cell(s) to the row
-    if (pTableData)
+    sal_uInt32 nGridBefore = getCurrentGridBefore();
+    if (pTableData && nGridBefore > 0 && pTableData->getCurrentRow()->getCellCount() > 0)
     {
-        sal_uInt32 nGridBefore
-            = mpTableDataHandler->getDomainMapperImpl().getTableManager().getCurrentGridBefore();
-        for (unsigned int i = 0; i < nGridBefore; ++i)
+        const css::uno::Reference<css::text::XTextRange>& xRowStart
+            = pTableData->getCurrentRow()->getCellStart(0);
+        if (xRowStart.is())
         {
-            css::table::BorderLine2 aBorderLine;
-            aBorderLine.Color = 0;
-            aBorderLine.InnerLineWidth = 0;
-            aBorderLine.OuterLineWidth = 0;
-            TablePropertyMapPtr pCellProperties(new TablePropertyMap);
-            pCellProperties->Insert(PROP_TOP_BORDER, css::uno::makeAny(aBorderLine));
-            pCellProperties->Insert(PROP_LEFT_BORDER, css::uno::makeAny(aBorderLine));
-            pCellProperties->Insert(PROP_BOTTOM_BORDER, css::uno::makeAny(aBorderLine));
-            pCellProperties->Insert(PROP_RIGHT_BORDER, css::uno::makeAny(aBorderLine));
-            pTableData->getCurrentRow()->addCell(pTableData->getCurrentRow()->getCellStart(0),
-                                                 pCellProperties, /*bAddBefore=*/true);
+            try
+            {
+                // valid TextRange for table creation (not a nested table)?
+                xRowStart->getText()->createTextCursorByRange(xRowStart);
+
+                for (unsigned int i = 0; i < nGridBefore; ++i)
+                {
+                    css::table::BorderLine2 aBorderLine;
+                    aBorderLine.Color = 0;
+                    aBorderLine.InnerLineWidth = 0;
+                    aBorderLine.OuterLineWidth = 0;
+                    TablePropertyMapPtr pCellProperties(new TablePropertyMap);
+                    pCellProperties->Insert(PROP_TOP_BORDER, css::uno::makeAny(aBorderLine));
+                    pCellProperties->Insert(PROP_LEFT_BORDER, css::uno::makeAny(aBorderLine));
+                    pCellProperties->Insert(PROP_BOTTOM_BORDER, css::uno::makeAny(aBorderLine));
+                    pCellProperties->Insert(PROP_RIGHT_BORDER, css::uno::makeAny(aBorderLine));
+                    pTableData->getCurrentRow()->addCell(xRowStart, pCellProperties,
+                                                         /*bAddBefore=*/true);
+                }
+            }
+            catch (css::uno::Exception const&)
+            {
+                // don't add gridBefore cells in not valid TextRange
+                setCurrentGridBefore(0);
+            }
         }
     }