ofz#8095 avoid recurse to death

Change-Id: I0acb0f68f64bb95a4510a330d463badd2cf8a84a
Reviewed-on: https://gerrit.libreoffice.org/53663Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

lotuswordpro/source/filter/lwpcelllayout.cxx

@@ -76,6 +76,7 @@
 
 LwpCellLayout::LwpCellLayout(LwpObjectHeader const &objHdr, LwpSvStream* pStrm)
     : LwpMiddleLayout(objHdr, pStrm)
+    , m_bConvertCell(false)
     , crowid(0)
     , ccolid(0)
     , cType(LDT_NONE)
@@ -891,11 +892,11 @@ rtl::Reference<XFCell> LwpHiddenCellLayout::ConvertCell(LwpObjectID aTableID, sa
         LwpCellLayout *pDefault = dynamic_cast<LwpCellLayout *>(pTable->GetDefaultCellStyle().obj().get());
         if (pDefault)
         {
-            xXFCell = pDefault->ConvertCell(aTableID, nRow, nCol);
+            xXFCell = pDefault->DoConvertCell(aTableID, nRow, nCol);
         }
         else
         {
-            xXFCell = pConnCell->ConvertCell(aTableID, nRow, nCol);
+            xXFCell = pConnCell->DoConvertCell(aTableID, nRow, nCol);
         }
         xXFCell->SetColumnSpaned(pConnCell->GetNumcols());
     }

lotuswordpro/source/filter/lwpcelllayout.hxx

@@ -89,7 +89,15 @@ public:
     LwpCellLayout(LwpObjectHeader const &objHdr, LwpSvStream* pStrm);
     virtual ~LwpCellLayout() override;
     virtual LWP_LAYOUT_TYPE GetLayoutType () override { return LWP_CELL_LAYOUT;}
-    virtual rtl::Reference<XFCell> ConvertCell(LwpObjectID aTableID, sal_uInt16 nRow, sal_uInt16 nCol);
+    rtl::Reference<XFCell> DoConvertCell(LwpObjectID aTableID, sal_uInt16 nRow, sal_uInt16 nCol)
+    {
+        if (m_bConvertCell)
+            throw std::runtime_error("recursion in page divisions");
+        m_bConvertCell = true;
+        rtl::Reference<XFCell> aRet = ConvertCell(aTableID, nRow, nCol);
+        m_bConvertCell = false;
+        return aRet;
+    }
     sal_uInt16 GetRowID(){return crowid;}
     sal_uInt8 GetColID(){return ccolid;}
     void RegisterStyle() override;
@@ -114,10 +122,12 @@ protected:
     OUString const & GetCellStyleName(sal_uInt16 nRow, sal_uInt16 nCol, LwpTableLayout * pTableLayout);
     void RegisterDefaultCell();
     virtual LwpCellBorderType GetCellBorderType(sal_uInt16 nRow, sal_uInt16 nCol, LwpTableLayout * pTableLayout);
+    virtual rtl::Reference<XFCell> ConvertCell(LwpObjectID aTableID, sal_uInt16 nRow, sal_uInt16 nCol);
     static LwpCellLayout * GetCellByRowCol(sal_uInt16 nRow, sal_uInt16 nCol, LwpTableLayout * pTableLayout);
     static sal_uInt16 GetLeftColID(sal_uInt16 nCol){return nCol - 1; };
     virtual sal_uInt16 GetBelowRowID(sal_uInt16 nRow){return nRow + 1; };
 
+    bool m_bConvertCell;
     sal_uInt16 crowid;
     sal_uInt8   ccolid;
     LwpObjectID cLayNumerics;
@@ -147,11 +157,11 @@ public:
     virtual ~LwpHiddenCellLayout() override;
     virtual LWP_LAYOUT_TYPE GetLayoutType () override { return LWP_HIDDEN_CELL_LAYOUT;}
     virtual void Parse(IXFStream* pOutputStream) override;
-    virtual rtl::Reference<XFCell> ConvertCell(LwpObjectID aTableID, sal_uInt16 nRow, sal_uInt16 nCol) override;
     void RegisterStyle() override {}
     virtual void SetCellMap() override;
 private:
     void Read() override;
+    virtual rtl::Reference<XFCell> ConvertCell(LwpObjectID aTableID, sal_uInt16 nRow, sal_uInt16 nCol) override;
     LwpObjectID cconnectedlayout;
 };
 
@@ -166,7 +176,6 @@ public:
     virtual ~LwpConnectedCellLayout() override;
     virtual LWP_LAYOUT_TYPE GetLayoutType () override { return LWP_CONNECTED_CELL_LAYOUT;}
     virtual void Parse(IXFStream* pOutputStream) override;
-    virtual rtl::Reference<XFCell> ConvertCell(LwpObjectID aTableID, sal_uInt16 nRow, sal_uInt16 nCol) override;
     sal_uInt16 GetNumrows(){return m_nRealrowspan;}
     sal_uInt8 GetNumcols(){return m_nRealcolspan;}
     virtual void SetCellMap() override;
@@ -175,6 +184,7 @@ protected:
     void Read() override;
     virtual sal_uInt16 GetBelowRowID(sal_uInt16 nRow) override {return nRow + m_nRealrowspan; };
     virtual LwpCellBorderType GetCellBorderType(sal_uInt16 nRow, sal_uInt16 nCol, LwpTableLayout * pTableLayout) override;
+    virtual rtl::Reference<XFCell> ConvertCell(LwpObjectID aTableID, sal_uInt16 nRow, sal_uInt16 nCol) override;
     sal_uInt16  cnumrows;
     sal_uInt8   cnumcols;
     sal_uInt16  m_nRealrowspan;

lotuswordpro/source/filter/lwprowlayout.cxx

@@ -232,7 +232,7 @@ void LwpRowLayout::ConvertRow(rtl::Reference<XFTable> const & pXFTable,sal_uInt8
         {
             sal_uInt8 nColID = m_ConnCellList[nMarkConnCell]->GetColID()
                     +m_ConnCellList[nMarkConnCell]->GetNumcols()-1;
-            xXFCell = m_ConnCellList[nMarkConnCell]->ConvertCell(
+            xXFCell = m_ConnCellList[nMarkConnCell]->DoConvertCell(
                 pTable->GetObjectID(),
                 crowid+m_ConnCellList[nMarkConnCell]->GetNumrows()-1,
                 m_ConnCellList[nMarkConnCell]->GetColID());
@@ -401,7 +401,7 @@ void LwpRowLayout::ConvertCommonRow(rtl::Reference<XFTable> const & pXFTable, sa
                     nCellEndCol = i+pConnCell->GetNumcols()-1;
                     i = nCellEndCol;
                 }
-                xCell = pCellLayout->ConvertCell(pTable->GetObjectID(),crowid,i);
+                xCell = pCellLayout->DoConvertCell(pTable->GetObjectID(),crowid,i);
                 break;
             }
             rCellID = pCellLayout->GetNext();
@@ -414,7 +414,7 @@ void LwpRowLayout::ConvertCommonRow(rtl::Reference<XFTable> const & pXFTable, sa
             LwpCellLayout * pDefaultCell = pTableLayout->GetDefaultCellLayout();
             if (pDefaultCell)
             {
-                xCell = pDefaultCell->ConvertCell(
+                xCell = pDefaultCell->DoConvertCell(
                     pTable->GetObjectID(),crowid, i);
             }
             else

lotuswordpro/source/filter/lwptablelayout.cxx

@@ -1361,7 +1361,7 @@ void LwpTableLayout::ConvertDefaultRow(rtl::Reference<XFTable> const & pXFTable,
         rtl::Reference<XFCell> xCell;
         if (m_pDefaultCellLayout)
         {
-            xCell = m_pDefaultCellLayout->ConvertCell(
+            xCell = m_pDefaultCellLayout->DoConvertCell(
                 GetTable()->GetObjectID(),nRowID,j+nStartCol);
         }
         else