Determine data size in cache that doesn't include trailing empty rows.

Change-Id: I47632b7ae93f4e68c4512fc30f4e4fe18e1c5f4d

sc/inc/dpcache.hxx

@@ -130,6 +130,7 @@ private:
 
     LabelsType maLabelNames;    // Stores dimension names.
     mdds::flat_segment_tree<SCROW, bool> maEmptyRows;
+    SCROW mnDataSize;
 
     bool mbDisposing;
 
@@ -159,8 +160,9 @@ public:
     bool InitFromDoc(ScDocument* pDoc, const ScRange& rRange);
     bool InitFromDataBase(DBConnector& rDB);
 
-    SCROW  GetRowCount() const;
-    SCROW  GetItemDataId( sal_uInt16 nDim, SCROW nRow, bool bRepeatIfEmpty ) const;
+    SCROW GetRowCount() const;
+    SCROW GetDataSize() const;
+    SCROW GetItemDataId( sal_uInt16 nDim, SCROW nRow, bool bRepeatIfEmpty ) const;
     rtl::OUString GetDimensionName(LabelsType::size_type nDim) const;
     bool IsRowEmpty(SCROW nRow) const;
     bool ValidQuery(SCROW nRow, const ScQueryParam& rQueryParam) const;

sc/source/core/data/dpcache.cxx

@@ -65,6 +65,7 @@ ScDPCache::ScDPCache(ScDocument* pDoc) :
     mpDoc( pDoc ),
     mnColumnCount ( 0 ),
     maEmptyRows(0, MAXROW, true),
+    mnDataSize(-1),
     mbDisposing(false)
 {
 }
@@ -654,7 +655,21 @@ public:
 
 void ScDPCache::PostInit()
 {
+    OSL_ENSURE(!maFields.empty(), "Cache not initialized!");
+
     maEmptyRows.build_tree();
+    typedef mdds::flat_segment_tree<SCROW, bool>::const_reverse_iterator itr_type;
+    itr_type it = maEmptyRows.rbegin(), itEnd = maEmptyRows.rend();
+    OSL_ENSURE(it != itEnd, "corrupt flat_segment_tree instance!");
+    mnDataSize = maFields[0].maItems.size();
+    ++it; // Skip the first position.
+    OSL_ENSURE(it != itEnd, "buggy version of flat_segment_tree is used.");
+    if (it->second)
+    {
+        SCROW nLastNonEmpty = it->first - 1;
+        if (nLastNonEmpty < mnDataSize)
+            mnDataSize = nLastNonEmpty;
+    }
 }
 
 void ScDPCache::Clear()
@@ -753,6 +768,11 @@ SCROW ScDPCache::GetRowCount() const
     return maFields[0].maData.size();
 }
 
+SCROW ScDPCache::GetDataSize() const
+{
+    return mnDataSize >= 0 ? mnDataSize : 0;
+}
+
 const ScDPCache::ItemsType& ScDPCache::GetDimMemberValues(SCCOL nDim) const
 {
     OSL_ENSURE( nDim>=0 && nDim < mnColumnCount ," nDim < mnColumnCount ");

sc/source/core/data/dpcachetable.cxx

@@ -147,6 +147,7 @@ void ScDPCacheTable::fillTable(
     const ScQueryParam& rQuery, bool bIgnoreEmptyRows, bool bRepeatIfEmpty)
 {
     const SCROW nRowCount = getRowSize();
+    SCROW nDataSize = mpCache->GetDataSize();
     const SCCOL  nColCount = (SCCOL) getColSize();
     if ( nRowCount <= 0 || nColCount <= 0)
         return;