/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkBridgeCellIterator.cxx

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
// .NAME vtkBridgeCellIterator - Implementation of vtkGenericCellIterator.
// It is just an example that show how to implement the Generic. It is also
// used for testing and evaluating the Generic.
// .SECTION See Also
// vtkGenericCellIterator, vtkBridgeDataSet

#include "vtkBridgeCellIterator.h"

#include <assert.h>

#include "vtkObjectFactory.h"
#include "vtkBridgeCell.h"
#include "vtkBridgeDataSet.h"
#include "vtkDataSet.h"
#include "vtkIdList.h"

#include "vtkBridgeCellIteratorOnDataSet.h"
#include "vtkBridgeCellIteratorOne.h"
#include "vtkBridgeCellIteratorOnCellBoundaries.h"
#include "vtkBridgeCellIteratorOnCellList.h"

vtkStandardNewMacro(vtkBridgeCellIterator);

//-----------------------------------------------------------------------------
void vtkBridgeCellIterator::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);
}

//-----------------------------------------------------------------------------
vtkBridgeCellIterator::vtkBridgeCellIterator()
{
//  this->DebugOn();
  this->CurrentIterator=0;
  this->IteratorOnDataSet=vtkBridgeCellIteratorOnDataSet::New();
  this->IteratorOneCell=vtkBridgeCellIteratorOne::New();
  this->IteratorOnCellBoundaries=vtkBridgeCellIteratorOnCellBoundaries::New();
  this->IteratorOnCellList=vtkBridgeCellIteratorOnCellList::New();
}

//-----------------------------------------------------------------------------
vtkBridgeCellIterator::~vtkBridgeCellIterator()
{
  this->IteratorOnDataSet->Delete();
  this->IteratorOneCell->Delete();
  this->IteratorOnCellBoundaries->Delete();
  this->IteratorOnCellList->Delete();
}

//-----------------------------------------------------------------------------
// Description:
// Move iterator to first position if any (loop initialization).
void vtkBridgeCellIterator::Begin()
{
  if(this->CurrentIterator!=0)
    {
    this->CurrentIterator->Begin();
    }
}

//-----------------------------------------------------------------------------
// Description:
// Is there no cell at iterator position? (exit condition).
int vtkBridgeCellIterator::IsAtEnd()
{
  int result=1;

  if(this->CurrentIterator!=0)
    {
    result=this->CurrentIterator->IsAtEnd();
    }
  return result;
}

//-----------------------------------------------------------------------------
// Description:
// Create an empty cell.
// \post result_exists: result!=0
vtkGenericAdaptorCell *vtkBridgeCellIterator::NewCell()
{
  vtkGenericAdaptorCell *result=vtkBridgeCell::New();
  assert("post: result_exists" && result!=0);
  return result;
}

//-----------------------------------------------------------------------------
// Description:
// Cell at current position
// \pre not_at_end: !IsAtEnd()
// \pre c_exists: c!=0
// THREAD SAFE
void vtkBridgeCellIterator::GetCell(vtkGenericAdaptorCell *c)
{
  assert("pre: not_at_end" && !IsAtEnd());
  assert("pre: c_exists" && c!=0);

  this->CurrentIterator->GetCell(c);
}

//-----------------------------------------------------------------------------
// Description:
// Cell at current position.
// NOT THREAD SAFE
// \pre not_at_end: !IsAtEnd()
// \post result_exits: result!=0
vtkGenericAdaptorCell *vtkBridgeCellIterator::GetCell()
{
  assert("pre: not_at_end" && !IsAtEnd());
  vtkGenericAdaptorCell *result=this->CurrentIterator->GetCell( );
  assert("post: result_exits" && result!=0);
  return result;
}

//-----------------------------------------------------------------------------
// Description:
// Move iterator to next position. (loop progression).
// \pre not_at_end: !IsAtEnd()
void vtkBridgeCellIterator::Next()
{
  assert("pre: not_off" && !IsAtEnd());
  this->CurrentIterator->Next();
}

//-----------------------------------------------------------------------------
// Description:
// Used internally by vtkBridgeDataSet.
// Iterate over cells of `ds' of some dimension `dim'.
// \pre ds_exists: ds!=0
// \pre valid_dim_range: (dim>=-1) && (dim<=3)
void vtkBridgeCellIterator::InitWithDataSet(vtkBridgeDataSet *ds,
                                            int dim)
{
  assert("pre: ds_exists" && ds!=0);
  assert("pre: valid_dim_range" && (dim>=-1) && (dim<=3));

  this->IteratorOnDataSet->InitWithDataSet(ds,dim);
  this->CurrentIterator=this->IteratorOnDataSet;
}

//-----------------------------------------------------------------------------
// Description:
// Used internally by vtkBridgeDataSet.
// Iterate over boundary cells of `ds' of some dimension `dim'.
// \pre ds_exists: ds!=0
// \pre valid_dim_range: (dim>=-1) && (dim<=3)
void vtkBridgeCellIterator::InitWithDataSetBoundaries(vtkBridgeDataSet *ds,
                                                      int dim,
                                                      int exterior_only)
{
  assert("pre: ds_exists" && ds!=0);
  assert("pre: valid_dim_range" && (dim>=-1) && (dim<=3));

  (void)ds;
  (void)dim;
  (void)exterior_only;

  assert("check: TODO" && 0);
}

//-----------------------------------------------------------------------------
// Description:
// Used internally by vtkBridgeDataSet.
// Iterate on one cell `id' of `ds'.
// \pre ds_exists: ds!=0
// \pre valid_id: (id>=0)&&(id<=ds->GetNumberOfCells())
void vtkBridgeCellIterator::InitWithOneCell(vtkBridgeDataSet *ds,
                                            vtkIdType cellid)
{
  assert("pre: ds_exists" && ds!=0);
  assert("pre: valid_id" && (cellid>=0)&&(cellid<=ds->GetNumberOfCells()));

  this->IteratorOneCell->InitWithOneCell(ds,cellid);
  this->CurrentIterator=this->IteratorOneCell;
}

//-----------------------------------------------------------------------------
// Description:
// Used internally by vtkBridgeCell.
// Iterate on one cell `c'.
// \pre c_exists: c!=0
void vtkBridgeCellIterator::InitWithOneCell(vtkBridgeCell *c)
{
  assert("pre: c_exists" && c!=0);
  this->IteratorOneCell->InitWithOneCell(c);
  this->CurrentIterator=this->IteratorOneCell;
}

//-----------------------------------------------------------------------------
// Description:
// Used internally by vtkBridgeCell.
// Iterate on boundary cells of a cell.
// \pre cell_exists: cell!=0
// \pre valid_dim_range: (dim==-1) || ((dim>=0)&&(dim<cell->GetDimension()))
void vtkBridgeCellIterator::InitWithCellBoundaries(vtkBridgeCell *cell,
                                                   int dim)
{
  assert("pre: cell_exists" && cell!=0);
  assert("pre: valid_dim_range" && ((dim==-1) || ((dim>=0)&&(dim<cell->GetDimension()))));
  this->IteratorOnCellBoundaries->InitWithCellBoundaries(cell,dim);
  this->CurrentIterator=this->IteratorOnCellBoundaries;
}

//-----------------------------------------------------------------------------
// Description:
// Used internally by vtkBridgeCell.
// Iterate on neighbors defined by `cells' over the dataset `ds'.
// \pre cells_exist: cells!=0
// \pre ds_exists: ds!=0
void vtkBridgeCellIterator::InitWithCells(vtkIdList *cells,
                                          vtkBridgeDataSet *ds)
{
  assert("pre: cells_exist" && cells!=0);
  assert("pre: ds_exists" && ds!=0);

  this->IteratorOnCellList->InitWithCells(cells,ds);
  this->CurrentIterator=this->IteratorOnCellList;
}

//-----------------------------------------------------------------------------
// Description:
// Used internally by vtkBridgeCell.
// Iterate on a boundary cell (defined by its points `pts' with coordinates
// `coords', dimension `dim' and unique id `cellid') of a cell.
// \pre coords_exist: coords!=0
// \pre pts_exist: pts!=0
// \pre valid_dim: dim>=0 && dim<=2
// \pre valid_points: pts->GetNumberOfIds()>dim
void vtkBridgeCellIterator::InitWithPoints(vtkPoints *coords,
                                           vtkIdList *pts,
                                           int dim,
                                           vtkIdType cellid)
{
  assert("pre: coords_exist" && coords!=0);
  assert("pre: pts_exist" && pts!=0);
  assert("pre: valid_dim" && dim>=0 && dim<=2);
  assert("pre: valid_points" && pts->GetNumberOfIds()>dim);

  this->IteratorOneCell->InitWithPoints(coords,pts,dim,cellid);
  this->CurrentIterator=this->IteratorOneCell;
}
