guard against infinite recursion

Change-Id: I1b566c835b6cdc733d0aa4393d3b3ce2ff7b764f
(cherry picked from commit 76220aaf)

lotuswordpro/source/filter/lwpdoc.cxx

@@ -71,6 +71,7 @@
 LwpDocument::LwpDocument(LwpObjectHeader& objHdr, LwpSvStream* pStrm)
     : LwpDLNFPVList(objHdr, pStrm)
     , m_pOwnedFoundry(nullptr)
+    , m_bGettingFirstDivisionWithContentsThatIsNotOLE(false)
     , m_nFlags(0)
     , m_nPersistentFlags(0)
     , m_pLnOpts(nullptr)
@@ -619,7 +620,7 @@ LwpDocument* LwpDocument::GetPreviousDivision()
   /**
  * @descr    Get first division with contents that is not ole, copy from lwp-source code
  */
- LwpDocument* LwpDocument::GetFirstDivisionWithContentsThatIsNotOLE()
+ LwpDocument* LwpDocument::ImplGetFirstDivisionWithContentsThatIsNotOLE()
 {
     LwpDivInfo* pDivInfo = dynamic_cast<LwpDivInfo*>(GetDivInfoID().obj().get());
     if(pDivInfo && pDivInfo->HasContents()
@@ -628,7 +629,7 @@ LwpDocument* LwpDocument::GetPreviousDivision()
 
     LwpDocument* pDivision = GetFirstDivision();
 
-    while (pDivision && pDivision != this)
+    while (pDivision)
     {
         LwpDocument* pContentDivision = pDivision->GetFirstDivisionWithContentsThatIsNotOLE();
         if(pContentDivision)

lotuswordpro/source/filter/lwpdoc.hxx

@@ -84,6 +84,7 @@ public:
 
 private:
     LwpFoundry* m_pOwnedFoundry;
+    bool m_bGettingFirstDivisionWithContentsThatIsNotOLE;
 
     //Data members in file format
     LwpObjectID m_DocSockID;
@@ -154,7 +155,15 @@ public:
     LwpDocument* GetLastDivisionWithContents();
     LwpDocument* GetLastInGroupWithContents();
     LwpDocument* GetRootDocument();
-    LwpDocument* GetFirstDivisionWithContentsThatIsNotOLE();
+    LwpDocument* GetFirstDivisionWithContentsThatIsNotOLE()
+    {
+        if (m_bGettingFirstDivisionWithContentsThatIsNotOLE)
+            throw std::runtime_error("recursion in page divisions");
+        m_bGettingFirstDivisionWithContentsThatIsNotOLE = true;
+        LwpDocument* pRet = ImplGetFirstDivisionWithContentsThatIsNotOLE();
+        m_bGettingFirstDivisionWithContentsThatIsNotOLE = false;
+        return pRet;
+    }
     LwpDocument* GetLastDivisionThatHasEndnote();
 
     LwpDocument* GetLastDivision();
@@ -167,6 +176,7 @@ public:
 
 private:
     void MaxNumberOfPages(sal_uInt16& nNumPages);
+    LwpDocument* ImplGetFirstDivisionWithContentsThatIsNotOLE();
     void XFConvertFrameInPage(XFContentContainer* pCont);
     static void ChangeStyleName();
     bool IsSkippedDivision();