0024023: Revamp the OCCT Handle -- general

Missing headers added; includes of headers "Handle_...hxx" removed.

Misuses of macro Handle() and its use in typedefs corrected.

Alias classes Profile and Option are removed from IFSelect; ones defined in MoniTool are used directly.

Removed header files defining only Handle classes (except Image_PixMap_Handle.hxx)

Classes SelectMgr_BaseFrustum and now inherit Standard_Transient and can be manipulated by Handle (not NCollection_Handle)

Fixed reference-type local variable pointing to temporary object

Use of handle in conditional expressions and comparisons to NULL are replaced by call to method IsNull()

src/TopoDSToStep/TopoDSToStep_MakeStepEdge.cxx

@@ -37,7 +37,7 @@
 
 #include <StepShape_Vertex.hxx>
 #include <StepShape_EdgeCurve.hxx>
-#include <StepGeom_Curve.hxx>
+#include <StepGeom_Line.hxx>
 #include <StepGeom_HArray1OfPcurveOrSurface.hxx>
 #include <StepGeom_SeamCurve.hxx>
 #include <StepGeom_SurfaceCurve.hxx>
@@ -236,7 +236,7 @@ void TopoDSToStep_MakeStepEdge::Init(const TopoDS_Edge& aEdge,
       //Points.SetValue(Nbpt, BRep_Tool::Pnt(Vlast));
       Mult.SetValue(1,2);
       Mult.SetValue(Nbpt,2);
-      Handle(Geom_BSplineCurve) Bs = 
+      Handle(Geom_Curve) Bs = 
 	new Geom_BSplineCurve(Points, Knots, Mult, 1);
       GeomToStep_MakeCurve MkCurve(Bs);
       Gpms = MkCurve.Value();

src/TopoDSToStep/TopoDSToStep_MakeStepFace.cxx

@@ -45,6 +45,7 @@
 #include <Geom_Circle.hxx>
 #include <Geom_TrimmedCurve.hxx>
 #include <Geom_SurfaceOfRevolution.hxx>
+#include <Geom_BSplineCurve.hxx>
 
 #include <Precision.hxx>
 #include <Geom2dAdaptor_Curve.hxx>

src/TopoDSToStep/TopoDSToStep_WireframeBuilder.cxx

@@ -58,7 +58,7 @@
 #include <Standard_NullObject.hxx>
 
 #include <StepGeom_CartesianPoint.hxx>
-#include <StepGeom_Curve.hxx>
+#include <StepGeom_Line.hxx>
 #include <StepGeom_SurfaceCurve.hxx>
 #include <StepGeom_SeamCurve.hxx>
 #include <StepGeom_TrimmedCurve.hxx>
@@ -298,7 +298,7 @@ Standard_Boolean TopoDSToStep_WireframeBuilder::
       Points.SetValue(Nbpt, BRep_Tool::Pnt(Vlast));
       Mult.SetValue(1,2);
       Mult.SetValue(Nbpt,2);
-      Handle(Geom_BSplineCurve) Bs = 
+      Handle(Geom_Curve) Bs = 
 	new Geom_BSplineCurve(Points, Knots, Mult, 1);
       GeomToStep_MakeCurve gtpC(Bs);
       Gpms = gtpC.Value();