Calc/Features/DataPilot drill-down on data field

Description

TODO: Describe the way rows are selected.

API Change

This functionality introduces the following new API.

[cpp,N] module com { module sun { module star { module sheet {

interface XDrillDownDataSupplier: com::sun::star::uno::XInterface {

   void getDrillDownData( [in] sequence< com::sun::star::sheet::DataPilotFieldFilter > aFilters, 
                          [out] sequence< sequence< any > > rData );

};

}; }; }; };

[cpp,N] module com { module sun { module star { module sheet {

struct DataPilotFieldFilter {

   /** Field name. */
   string FieldName;

   /** String value that needs to match against. */
   string MatchValue;

};

}; }; }; };

The com.sun.star.sheet.DataPilotSource service is expected to support XDrillDownDataSupplier interface, to provide a 2-dimensional array data consisting of a subset of the original data source table that satisfies a given set of filtering criteria. A sequence of DataPilotFieldFilter provides desired filtering criteria to XDrillDownDataSupplier::getDrillDownData() method.

TODO: Add another method that takes a cell address instead of a sequence of filters.