OCCT

// Created on: 1998-06-03
// Created by: data exchange team
// Copyright (c) 1998-1999 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 _ShapeBuild_ReShape_HeaderFile
#define _ShapeBuild_ReShape_HeaderFile

#include <Standard.hxx>
#include <Standard_Type.hxx>

#include <BRepTools_ReShape.hxx>
#include <NCollection_Map.hxx>
#include <TopAbs_ShapeEnum.hxx>
#include <TopoDS_TShape.hxx>
#include <Standard_Integer.hxx>
#include <ShapeExtend_Status.hxx>
class TopoDS_Shape;

// resolve name collisions with X11 headers
#ifdef Status
  #undef Status
#endif

//! Rebuilds a Shape by making pre-defined substitutions on some
//! of its components
//!
//! In a first phase, it records requests to replace or remove
//! some individual shapes
//! For each shape, the last given request is recorded
//! Requests may be applied "Oriented" (i.e. only to an item with
//! the SAME orientation) or not (the orientation of replacing
//! shape is respectful of that of the original one)
//!
//! Then, these requests may be applied to any shape which may
//! contain one or more of these individual shapes
class ShapeBuild_ReShape : public BRepTools_ReShape
{

public:
  //! Returns an empty Reshape
  Standard_EXPORT ShapeBuild_ReShape();

  //! Applies the substitutions requests to a shape
  //!
  //! <until> gives the level of type until which requests are taken
  //! into account. For subshapes of the type <until> no rebuild
  //! and further exploring are done.
  //! ACTUALLY, NOT IMPLEMENTED BELOW TopAbs_FACE
  //!
  //! <buildmode> says how to do on a SOLID,SHELL ... if one of its
  //! sub-shapes has been changed:
  //! 0: at least one Replace or Remove -> COMPOUND, else as such
  //! 1: at least one Remove (Replace are ignored) -> COMPOUND
  //! 2: Replace and Remove are both ignored
  //! If Replace/Remove are ignored or absent, the result as same
  //! type as the starting shape
  Standard_EXPORT virtual TopoDS_Shape Apply(const TopoDS_Shape&    shape,
                                             const TopAbs_ShapeEnum until,
                                             const int              buildmode);

  //! Applies the substitutions requests to a shape.
  //!
  //! <until> gives the level of type until which requests are taken
  //! into account. For subshapes of the type <until> no rebuild
  //! and further exploring are done.
  //!
  //! NOTE: each subshape can be replaced by shape of the same type
  //! or by shape containing only shapes of that type (for
  //! example, TopoDS_Edge can be replaced by TopoDS_Edge,
  //! TopoDS_Wire or TopoDS_Compound containing TopoDS_Edges).
  //! If incompatible shape type is encountered, it is ignored
  //! and flag FAIL1 is set in Status.
  Standard_EXPORT TopoDS_Shape Apply(const TopoDS_Shape&    shape,
                                     const TopAbs_ShapeEnum until = TopAbs_SHAPE) override;

  //! Returns a complete substitution status for a shape
  //! 0  : not recorded,   <newsh> = original <shape>
  //! < 0: to be removed,  <newsh> is NULL
  //! > 0: to be replaced, <newsh> is a new item
  //! If <last> is False, returns status and new shape recorded in
  //! the map directly for the shape, if True and status > 0 then
  //! recursively searches for the last status and new shape.
  Standard_EXPORT int Status(const TopoDS_Shape& shape,
                             TopoDS_Shape&       newsh,
                             const bool          last = false) override;

  //! Queries the status of last call to Apply(shape,enum)
  //! OK   : no (sub)shapes replaced or removed
  //! DONE1: source (starting) shape replaced
  //! DONE2: source (starting) shape removed
  //! DONE3: some subshapes replaced
  //! DONE4: some subshapes removed
  //! FAIL1: some replacements not done because of bad type of subshape
  Standard_EXPORT virtual bool Status(const ShapeExtend_Status status) const;

  DEFINE_STANDARD_RTTIEXT(ShapeBuild_ReShape, BRepTools_ReShape)

private:
  //! Recursive worker for Apply with a DFS in-flight set keyed by TShape handle.
  //! Prevents unbounded descent when a replacement is a compound that transitively
  //! contains the original shape as a sub-shape (cyclic containment, distinct from
  //! cycles in the replacement map itself).
  TopoDS_Shape applyImpl(const TopoDS_Shape&                          theShape,
                         const TopAbs_ShapeEnum                       theUntil,
                         NCollection_Map<occ::handle<TopoDS_TShape>>& theInFlight);
};

#endif // _ShapeBuild_ReShape_HeaderFile