remove conditional formats withiout range after import, related fdo#56983

Change-Id: I9a8c02369c3e5a12310a46229bdc1671f75593ad

sc/inc/conditio.hxx

@@ -409,6 +409,12 @@ public:
 
     void    InsertNew( ScConditionalFormat* pNew )
                 { maConditionalFormats.insert(pNew); }
+    /**
+     * Checks that all cond formats have a non empty range.
+     * Deletes empty cond formats.
+     * @return true if all cond formats were valid
+     */
+    bool    CheckAllEntries();
 
     ScConditionalFormat* GetFormat( sal_uInt32 nKey );
 

sc/source/core/data/conditio.cxx

@@ -1975,20 +1975,32 @@ void ScConditionalFormatList::UpdateMoveTab( SCTAB nOldPos, SCTAB nNewPos )
         itr->UpdateMoveTab( nOldPos, nNewPos );
 }
 
-void ScConditionalFormatList::DeleteArea( SCCOL nCol1, SCROW nRow1, SCCOL nCol2, SCROW nRow2 )
+bool ScConditionalFormatList::CheckAllEntries()
 {
-    for( iterator itr = begin(); itr != end(); ++itr)
-        itr->DeleteArea( nCol1, nRow1, nCol2, nRow2 );
-
+    bool bValid = true;
+    //
     // need to check which must be deleted
     iterator itr = begin();
     while(itr != end())
     {
         if(itr->GetRange().empty())
+        {
+            bValid = false;
             maConditionalFormats.erase(itr++);
+        }
         else
             ++itr;
     }
+
+    return bValid;
+}
+
+void ScConditionalFormatList::DeleteArea( SCCOL nCol1, SCROW nRow1, SCCOL nCol2, SCROW nRow2 )
+{
+    for( iterator itr = begin(); itr != end(); ++itr)
+        itr->DeleteArea( nCol1, nRow1, nCol2, nRow2 );
+
+    CheckAllEntries();
 }
 
 void ScConditionalFormatList::SourceChanged( const ScAddress& rAddr )

sc/source/filter/xml/xmlcondformat.cxx

@@ -65,6 +65,17 @@ SvXMLImportContext* ScXMLConditionalFormatsContext::CreateChildContext( sal_uInt
     return pContext;
 }
 
+void ScXMLConditionalFormatsContext::EndElement()
+{
+    ScDocument* pDoc = GetScImport().GetDocument();
+
+    SCTAB nTab = GetScImport().GetTables().GetCurrentSheet();
+    ScConditionalFormatList* pCondFormatList = pDoc->GetCondFormList(nTab);
+    bool bDeleted = !pCondFormatList->CheckAllEntries();
+
+    SAL_WARN_IF(bDeleted, "sc", "conditional formats have been deleted because they contained empty range info");
+}
+
 ScXMLConditionalFormatContext::ScXMLConditionalFormatContext( ScXMLImport& rImport, sal_uInt16 nPrfx,
                         const ::rtl::OUString& rLName, const ::com::sun::star::uno::Reference< ::com::sun::star::xml::sax::XAttributeList>& xAttrList):
     SvXMLImportContext( rImport, nPrfx, rLName )

sc/source/filter/xml/xmlcondformat.hxx

@@ -51,6 +51,8 @@ public:
                                      const ::rtl::OUString& rLocalName,
                                      const ::com::sun::star::uno::Reference<
                                           ::com::sun::star::xml::sax::XAttributeList>& xAttrList );
+
+    virtual void EndElement();
 };
 
 class ScXMLConditionalFormatContext : public SvXMLImportContext