ofz#20507 infinite table conversion

Change-Id: I779ab29d93491a296156fcc14557755754c2afdf
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/87924
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

3 files changed, 38 insertions, 1 deletions

diff --git a/lotuswordpro/qa/cppunit/data/pass/ofz20507-1.lwp b/lotuswordpro/qa/cppunit/data/pass/ofz20507-1.lwp
new file mode 100644
index 000000000000..26fc903db6bc
--- /dev/null
+++ b/lotuswordpro/qa/cppunit/data/pass/ofz20507-1.lwp
diff --git a/lotuswordpro/source/filter/lwptablelayout.cxx b/lotuswordpro/source/filter/lwptablelayout.cxx
index 0698b1b56a7e..6cf91d345506 100644
--- a/lotuswordpro/source/filter/lwptablelayout.cxx
+++ b/lotuswordpro/source/filter/lwptablelayout.cxx
@@ -81,10 +81,12 @@
 #include <xfilter/xffloatframe.hxx>
 #include "lwpframelayout.hxx"
 #include <xfilter/xfparastyle.hxx>
-#include <memory>
 #include <o3tl/sorted_vector.hxx>
 #include <sal/log.hxx>
 
+#include <algorithm>
+#include <memory>
+
 LwpSuperTableLayout::LwpSuperTableLayout(LwpObjectHeader const &objHdr, LwpSvStream* pStrm)
     : LwpPlacableLayout(objHdr, pStrm)
 {
@@ -1057,6 +1059,14 @@ bool  LwpTableLayout::FindSplitColMark(XFTable* pXFTable, sal_uInt8* pCellMark,
     return bFindFlag;
 }
 
+static bool operator==(const TableConvertAttempt& a, const TableConvertAttempt& b)
+{
+    return a.mnStartRow == b.mnStartRow &&
+           a.mnEndRow == b.mnEndRow &&
+           a.mnStartCol== b.mnStartCol &&
+           a.mnEndCol == b.mnEndCol;
+}
+
 /**
  * @short   convert word pro table to SODC table
  * @param  pXFTable - pointer of table
@@ -1068,6 +1078,16 @@ bool  LwpTableLayout::FindSplitColMark(XFTable* pXFTable, sal_uInt8* pCellMark,
 void LwpTableLayout::ConvertTable(rtl::Reference<XFTable> const & pXFTable, sal_uInt16 nStartRow,
                 sal_uInt16 nEndRow,sal_uInt8 nStartCol,sal_uInt8 nEndCol)
 {
+    TableConvertAttempt aConversionAttempt(nStartRow, nEndRow, nStartCol, nEndCol);
+    auto itr = std::find(m_aConvertingStack.begin(), m_aConvertingStack.end(), aConversionAttempt);
+    if (itr != m_aConvertingStack.end())
+    {
+        SAL_WARN("lwp", "already trying to convert this range");
+        return;
+    }
+
+    m_aConvertingStack.push_back(aConversionAttempt);
+
     //out put column info TO BE CHANGED
     ConvertColumn(pXFTable,nStartCol,nEndCol);
 
@@ -1096,6 +1116,8 @@ void LwpTableLayout::ConvertTable(rtl::Reference<XFTable> const & pXFTable, sal_
             }
         }
     }
+
+    m_aConvertingStack.pop_back();
 }
 
 /**
diff --git a/lotuswordpro/source/filter/lwptablelayout.hxx b/lotuswordpro/source/filter/lwptablelayout.hxx
index 5e232dba73b4..9cc0c885aa49 100644
--- a/lotuswordpro/source/filter/lwptablelayout.hxx
+++ b/lotuswordpro/source/filter/lwptablelayout.hxx
@@ -81,6 +81,19 @@ class LwpRowHeadingLayout;
 class LwpConnectedCellLayout;
 class LwpColumnLayout;
 
+struct TableConvertAttempt
+{
+    sal_uInt16 mnStartRow;
+    sal_uInt16 mnEndRow;
+    sal_uInt8 mnStartCol;
+    sal_uInt8 mnEndCol;
+
+    TableConvertAttempt(sal_uInt16 nStartRow, sal_uInt16 nEndRow, sal_uInt8 nStartCol, sal_uInt8 nEndCol)
+        : mnStartRow(nStartRow), mnEndRow(nEndRow), mnStartCol(nStartCol), mnEndCol(nEndCol)
+    {
+    }
+};
+
 /**
  * @brief
  * VO_TABLELAYOUT object and functions for registering styles and converting tables
@@ -115,6 +128,8 @@ protected:
     sal_uInt16 m_nRows;
     sal_uInt16 m_nCols;
 
+    std::vector<TableConvertAttempt> m_aConvertingStack;
+
 private:
     //CColumnLayoutHead cColumnLayout;
     LwpObjectID m_ColumnLayout;