0031313: Foundation Classes - Dump improvement for classes

- Provide DumpJson for geometrical, ocaf and visualization classes;
- Change depth parameter of DumpJson (constant is not obligate here)
- Introduce a new macro for transient objects to be called as the first row in DumpJson: OCCT_DUMP_TRANSIENT_CLASS_BEGIN. We need not put the class name in the macro, using get_type_name of Standard_Transient for it.
- change implementation of OCCT_DUMP_CLASS_BEGIN and OCCT_DUMP_TRANSIENT_CLASS_BEGIN. It is not an sentry more and it does not create a new hierarchy level. It appends a new row into the output stream: "className": <className>
- OCCT_DUMP_* does not require semicolon
- class header is included first in source files of TDataStd, TDocStd, TCAFDoc

src/SelectBasics/SelectBasics_SelectingVolumeManager.hxx

@@ -20,6 +20,7 @@
 #include <gp_Pnt.hxx>
 #include <TColgp_HArray1OfPnt.hxx>
 #include <SelectBasics_PickResult.hxx>
+#include <Standard_Dump.hxx>
 
 class Bnd_Box;
 class gp_Pnt;
@@ -116,6 +117,10 @@ public:
   //! Ax + By + Cz + D = 0) to the given vector
   virtual void GetPlanes (NCollection_Vector<NCollection_Vec4<Standard_Real> >& thePlaneEquations) const = 0;
 
+  //! Dumps the content of me into the stream
+  virtual void DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth = -1) const
+  { (void)theDepth; OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myActiveSelectionType) }
+
 protected:
   SelectionType myActiveSelectionType;      //!< Active selection type: point, box or polyline
 };