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

  Program:   Visualization Toolkit
  Module:    vtkProgrammableAttributeDataFilter.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.

=========================================================================*/
#include "vtkProgrammableAttributeDataFilter.h"

#include "vtkCellData.h"
#include "vtkDataSetCollection.h"
#include "vtkGarbageCollector.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"

vtkStandardNewMacro(vtkProgrammableAttributeDataFilter);

vtkProgrammableAttributeDataFilter::vtkProgrammableAttributeDataFilter()
{
  this->ExecuteMethod = NULL;
  this->ExecuteMethodArg = NULL;
  this->ExecuteMethodArgDelete = NULL;
  this->InputList = vtkDataSetCollection::New();
}

vtkProgrammableAttributeDataFilter::~vtkProgrammableAttributeDataFilter()
{
  // delete the current arg if there is one and a delete meth
  if ((this->ExecuteMethodArg)&&(this->ExecuteMethodArgDelete))
  {
    (*this->ExecuteMethodArgDelete)(this->ExecuteMethodArg);
  }
  if (this->InputList)
  {
    this->InputList->Delete();
    this->InputList = NULL;
  }
}

// Add a dataset to the list of data to process.
void vtkProgrammableAttributeDataFilter::AddInput(vtkDataSet *ds)
{
  if ( ! this->InputList->IsItemPresent(ds) )
  {
    this->Modified();
    this->InputList->AddItem(ds);
  }
}

// Remove a dataset from the list of data to process.
void vtkProgrammableAttributeDataFilter::RemoveInput(vtkDataSet *ds)
{
  if ( this->InputList->IsItemPresent(ds) )
  {
    this->Modified();
    this->InputList->RemoveItem(ds);
  }
}

// Specify the function to use to operate on the point attribute data. Note
// that the function takes a single (void *) argument.
void vtkProgrammableAttributeDataFilter::SetExecuteMethod(
  void (*f)(void *), void *arg)
{
  if ( f != this->ExecuteMethod || arg != this->ExecuteMethodArg )
  {
    // delete the current arg if there is one and a delete meth
    if ((this->ExecuteMethodArg)&&(this->ExecuteMethodArgDelete))
    {
      (*this->ExecuteMethodArgDelete)(this->ExecuteMethodArg);
    }
    this->ExecuteMethod = f;
    this->ExecuteMethodArg = arg;
    this->Modified();
  }
}

// Set the arg delete method. This is used to free user memory.
void vtkProgrammableAttributeDataFilter::SetExecuteMethodArgDelete(
  void (*f)(void *))
{
  if ( f != this->ExecuteMethodArgDelete)
  {
    this->ExecuteMethodArgDelete = f;
    this->Modified();
  }
}

int vtkProgrammableAttributeDataFilter::RequestData(
  vtkInformation *vtkNotUsed(request),
  vtkInformationVector **inputVector,
  vtkInformationVector *outputVector)
{
  // get the info objects
  vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
  vtkInformation *outInfo = outputVector->GetInformationObject(0);

  // get the input and output
  vtkDataSet *input = vtkDataSet::SafeDownCast(
    inInfo->Get(vtkDataObject::DATA_OBJECT()));
  vtkDataSet *output = vtkDataSet::SafeDownCast(
    outInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkDebugMacro(<<"Executing programmable point data filter");

  // First, copy the input to the output as a starting point
  output->CopyStructure( input );

  // Output data is the same as input data by default.
  output->GetCellData()->PassData(input->GetCellData());
  output->GetPointData()->PassData(input->GetPointData());

  // Now invoke the procedure, if specified.
  if ( this->ExecuteMethod != NULL )
  {
    (*this->ExecuteMethod)(this->ExecuteMethodArg);
  }

  return 1;
}

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

  os << indent << "Input DataSets:\n";
  this->InputList->PrintSelf(os,indent.GetNextIndent());

  if ( this->ExecuteMethod )
  {
    os << indent << "An ExecuteMethod has been defined\n";
  }
  else
  {
    os << indent << "An ExecuteMethod has NOT been defined\n";
  }
}

//----------------------------------------------------------------------------
void
vtkProgrammableAttributeDataFilter
::ReportReferences(vtkGarbageCollector* collector)
{
  this->Superclass::ReportReferences(collector);
  vtkGarbageCollectorReport(collector, this->InputList, "InputList");
}
