// Created on: 1994-12-02
// Created by: Jacques GOUSSARD
// Copyright (c) 1994-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#ifndef _BRepBuilderAPI_ModifyShape_HeaderFile
#define _BRepBuilderAPI_ModifyShape_HeaderFile

#include <Standard.hxx>
#include <Standard_DefineAlloc.hxx>
#include <Standard_Handle.hxx>

#include <BRepTools_Modifier.hxx>
#include <TopoDS_Shape.hxx>
#include <BRepBuilderAPI_MakeShape.hxx>
#include <NCollection_List.hxx>
class BRepTools_Modification;

//! Implements the methods of MakeShape for the
//! constant topology modifications. The methods are
//! implemented when the modification uses a Modifier
//! from BRepTools. Some of them have to be redefined
//! if the modification is implemented with another
//! tool (see Transform from BRepBuilderAPI for example).
//! The BRepBuilderAPI package provides the following
//! frameworks to perform modifications of this sort:
//! -   BRepBuilderAPI_Copy to produce the copy of a shape,
//! -   BRepBuilderAPI_Transform and
//! BRepBuilderAPI_GTransform to apply a geometric
//! transformation to a shape,
//! -   BRepBuilderAPI_NurbsConvert to convert the
//! whole geometry of a shape into NURBS geometry,
//! -   BRepOffsetAPI_DraftAngle to build a tapered shape.
class BRepBuilderAPI_ModifyShape : public BRepBuilderAPI_MakeShape
{
public:
  DEFINE_STANDARD_ALLOC

  //! Returns the list of shapes modified from the shape
  //! <S>.
  Standard_EXPORT const NCollection_List<TopoDS_Shape>& Modified(const TopoDS_Shape& S) override;

  //! Returns the modified shape corresponding to <S>.
  //! S can correspond to the entire initial shape or to its subshape.
  //! Exceptions
  //! Standard_NoSuchObject if S is not the initial shape or
  //! a subshape of the initial shape to which the
  //! transformation has been applied. Raises NoSuchObject from Standard
  //! if S is not the initial shape or a sub-shape
  //! of the initial shape.
  Standard_EXPORT virtual TopoDS_Shape ModifiedShape(const TopoDS_Shape& S) const;

protected:
  //! Empty constructor.
  Standard_EXPORT BRepBuilderAPI_ModifyShape();

  //! Initializes the modifier with the Shape <S>, and
  //! set the field <myInitialShape> to <S>.
  Standard_EXPORT BRepBuilderAPI_ModifyShape(const TopoDS_Shape& S);

  //! Set the field <myModification> with <M>.
  Standard_EXPORT BRepBuilderAPI_ModifyShape(const occ::handle<BRepTools_Modification>& M);

  //! Initializes the modifier with the Shape <S>, and
  //! set the field <myInitialShape> to <S>, and set the
  //! field <myModification> with <M>, the performs the
  //! modification.
  Standard_EXPORT BRepBuilderAPI_ModifyShape(const TopoDS_Shape&                        S,
                                             const occ::handle<BRepTools_Modification>& M);

  //! Performs the previously given modification on the
  //! shape <S>.
  Standard_EXPORT void DoModif(const TopoDS_Shape& S);

  //! Performs the modification <M> on a previously
  //! given shape.
  Standard_EXPORT void DoModif(const occ::handle<BRepTools_Modification>& M);

  //! Performs the modification <M> on the shape <S>.
  Standard_EXPORT void DoModif(const TopoDS_Shape& S, const occ::handle<BRepTools_Modification>& M);

  BRepTools_Modifier                  myModifier;
  TopoDS_Shape                        myInitialShape;
  occ::handle<BRepTools_Modification> myModification;

private:
  Standard_EXPORT void DoModif();
};

#endif // _BRepBuilderAPI_ModifyShape_HeaderFile
