vtkFieldData.h

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

  Program:   Visualization Toolkit
  Module:    vtkFieldData.h

  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.

=========================================================================*/
#ifndef vtkFieldData_h
#define vtkFieldData_h

#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"

#include "vtkAbstractArray.h" // Needed for inline methods.

class vtkIdList;

class VTKCOMMONDATAMODEL_EXPORT vtkFieldData : public vtkObject
{
public:
  static vtkFieldData *New();

  vtkTypeMacro(vtkFieldData,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  virtual void Initialize();

  vtkTypeBool Allocate(vtkIdType sz, vtkIdType ext=1000);

  void CopyStructure(vtkFieldData*);

  void AllocateArrays(int num);

  int GetNumberOfArrays()
  {
      return this->NumberOfActiveArrays;
  }

  int AddArray(vtkAbstractArray *array);


  virtual void RemoveArray(const char *name);
  virtual void RemoveArray(int index);

  vtkDataArray *GetArray(int i);

  vtkDataArray *GetArray(const char *arrayName, int &index);


  vtkDataArray *GetArray(const char *arrayName)
  {
      int i;
      return this->GetArray(arrayName, i);
  }

  vtkAbstractArray* GetAbstractArray(int i);

  vtkAbstractArray* GetAbstractArray(const char* arrayName, int &index);


  vtkAbstractArray* GetAbstractArray(const char* arrayName)
  {
    int i;
    return this->GetAbstractArray(arrayName, i);
  }


  int HasArray(const char *name)
  {
      int i;
      vtkAbstractArray *array = this->GetAbstractArray(name, i);
      // assert( i == -1);
      return array ? 1 : 0;
  }


  const char* GetArrayName(int i)
  {
    vtkAbstractArray* da = this->GetAbstractArray(i);
    return da ? da->GetName() : nullptr;
  }

  virtual void PassData(vtkFieldData* fd);

  void CopyFieldOn(const char* name) { this->CopyFieldOnOff(name, 1); }
  void CopyFieldOff(const char* name) { this->CopyFieldOnOff(name, 0); }

  virtual void CopyAllOn(int unused=0);

  virtual void CopyAllOff(int unused=0);

  virtual void DeepCopy(vtkFieldData *da);

  virtual void ShallowCopy(vtkFieldData *da);

  void Squeeze();

  void Reset();

  virtual unsigned long GetActualMemorySize();

  vtkMTimeType GetMTime() override;

  void GetField(vtkIdList *ptId, vtkFieldData *f);

  int GetArrayContainingComponent(int i, int& arrayComp);

  int GetNumberOfComponents();

  vtkIdType GetNumberOfTuples();

  void SetNumberOfTuples(const vtkIdType number);

  void SetTuple(const vtkIdType i, const vtkIdType j, vtkFieldData* source);

  void InsertTuple(const vtkIdType i, const vtkIdType j, vtkFieldData* source);

  vtkIdType InsertNextTuple(const vtkIdType j, vtkFieldData* source);

protected:

  vtkFieldData();
  ~vtkFieldData() override;

  int NumberOfArrays;
  int NumberOfActiveArrays;
  vtkAbstractArray **Data;

  void SetArray(int i, vtkAbstractArray *array);

  virtual void InitializeFields();

  struct CopyFieldFlag
  {
    char* ArrayName;
    int IsCopied;
  };

  CopyFieldFlag* CopyFieldFlags; //the names of fields not to be copied
  int NumberOfFieldFlags; //the number of fields not to be copied
  void CopyFieldOnOff(const char* name, int onOff);
  void ClearFieldFlags();
  int FindFlag(const char* field);
  int GetFlag(const char* field);
  void CopyFlags(const vtkFieldData* source);
  int DoCopyAllOn;
  int DoCopyAllOff;


private:
  vtkFieldData(const vtkFieldData&) = delete;
  void operator=(const vtkFieldData&) = delete;

public:

  class VTKCOMMONDATAMODEL_EXPORT BasicIterator
  {
  public:
    BasicIterator();
    BasicIterator(const BasicIterator& source);
    BasicIterator(const int* list, unsigned int listSize);
    BasicIterator& operator=(const BasicIterator& source);
    virtual ~BasicIterator();
    void PrintSelf(ostream &os, vtkIndent indent);

    int GetListSize() const
    {
        return this->ListSize;
    }
    int GetCurrentIndex()
    {
        return this->List[this->Position];
    }
    int BeginIndex()
    {
        this->Position = -1;
        return this->NextIndex();
    }
    int End() const
    {
        return (this->Position >= this->ListSize);
    }
    int NextIndex()
    {
        this->Position++;
        return (this->End() ? -1 : this->List[this->Position]);
    }

  protected:

    int* List;
    int ListSize;
    int Position;
  };

  class VTKCOMMONDATAMODEL_EXPORT Iterator : public BasicIterator
  {
  public:

    Iterator(const Iterator& source);
    Iterator& operator=(const Iterator& source);
    ~Iterator() override;
    Iterator(vtkFieldData* dsa, const int* list=nullptr,
             unsigned int listSize=0);

    vtkDataArray* Begin()
    {
        this->Position = -1;
        return this->Next();
    }

    vtkDataArray* Next()
    {
        this->Position++;
        if (this->End())
        {
          return nullptr;
        }

        // vtkFieldData::GetArray() can return null, which implies that
        // a the array at the given index in not a vtkDataArray subclass.
        // This iterator skips such arrays.
        vtkDataArray* cur =  Fields->GetArray(this->List[this->Position]);
        return (cur? cur : this->Next());
    }

    void DetachFieldData();

  protected:
    vtkFieldData* Fields;
    int Detached;
  };

};


#endif