Continuation of !2267 (Add Area accessor for calorimeter parts )

This is a continuation of !2267 (closed) (to address the issues pointed by the reviews)

The original branch is quite old so I rebased it on master.

Goes with Rec!2191 (merged)

@sponce @graven @cmarinbe @conrad

Det/CaloDet/CaloDet/DeCalorimeter.h

@@ -31,6 +31,7 @@
 // ============================================================================
 // Kernel/LHCbKernel
 // ============================================================================
+#include "Kernel/CaloCellCode.h"
 #include "Kernel/CaloCellID.h"
 // ============================================================================
 // Calo/CaloKernel
@@ -97,6 +98,8 @@ public:
   inline bool isInitialized() const { return m_initialized; }
 
   // geometry setters (temp)
+  void setXSize( const double xSize ) { m_xSize = xSize; }
+  void setYSize( const double ySize ) { m_ySize = ySize; }
   void setZSize( const double zSize ) { m_zSize = zSize; }
   void setZOffset( const double zOffset ) { m_zOffset = zOffset; }
 
@@ -113,6 +116,8 @@ public:
   //----------------------------------
   // get constant access to subcalorimeters
   const SubCalos& subCalos() const { return m_subCalos; }
+  double          xSize() const { return m_xSize; };
+  double          ySize() const { return m_ySize; };
   double          zSize() const { return m_zSize; };
   double          zOffset() const { return m_zOffset; };
   unsigned int    numberOfAreas() const { return m_nArea; };
@@ -256,8 +261,9 @@ public:
   CaloPin   caloPin( LHCb::CaloCellID id ) const { return m_pins[id]; }
   CaloLed   caloLed( const int led ) const { return ( led < (int)m_leds.size() ) ? m_leds[led] : -1; }
   //  More complex functions
-  LHCb::CaloCellID Cell( const Gaudi::XYZPoint& point ) const;
-  const CellParam* Cell_( const Gaudi::XYZPoint& point ) const;
+  LHCb::CaloCellID       Cell( const Gaudi::XYZPoint& point ) const;
+  const CellParam*       Cell_( const Gaudi::XYZPoint& point ) const;
+  CaloCellCode::CaloArea Area( const Gaudi::XYZPoint& point ) const;
   // Collections
   const CaloVector<CellParam>&   cellParams() const { return m_cells; }
   const CaloVector<CaloPin>&     caloPins() const { return m_pins; }
@@ -301,6 +307,8 @@ private:
 
   // geometry
   double       m_YToXSizeRatio = std::numeric_limits<double>::signaling_NaN();
+  double       m_xSize         = std::numeric_limits<double>::signaling_NaN();
+  double       m_ySize         = std::numeric_limits<double>::signaling_NaN();
   double       m_zSize         = std::numeric_limits<double>::signaling_NaN();
   double       m_zOffset       = std::numeric_limits<double>::signaling_NaN();
   SubCalos     m_subCalos;