File: vtkSMDomain.cxx

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

  Program:   ParaView
  Module:    vtkSMDomain.cxx

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html 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 "vtkSMDomain.h"

#include "vtkCommand.h"
#include "vtkPVXMLElement.h"
#include "vtkSMProperty.h"
#include "vtkSMSession.h"
#include "vtkSMSourceProxy.h"
#include "vtkSMUncheckedPropertyHelper.h"
#include "vtkStdString.h"
#include "vtkWeakPointer.h"

#include <assert.h>
#include <map>

struct vtkSMDomainInternals
{
  // This used to be a vtkSmartPointer. Converting this to vtkWeakPointer.
  // There's no reason why a domain should have a hard reference to the required
  // property since both the domain and the required property belong to the same
  // proxy, so they will be deleted only when the proxy disappears.
  typedef std::map<vtkStdString, vtkWeakPointer<vtkSMProperty> > PropertyMap;
  PropertyMap RequiredProperties;

  // This is the property that has this domain.
  vtkWeakPointer<vtkSMProperty> DomainProperty;
};

//---------------------------------------------------------------------------
vtkSMDomain::vtkSMDomain()
{
  this->XMLName = 0;
  this->Internals = new vtkSMDomainInternals;
  this->IsOptional = false;
}

//---------------------------------------------------------------------------
vtkSMDomain::~vtkSMDomain()
{
  this->SetXMLName(0);
  delete this->Internals;
}

//---------------------------------------------------------------------------
vtkSMProperty* vtkSMDomain::GetRequiredProperty(const char* function)
{
  vtkSMDomainInternals::PropertyMap::iterator iter =
    this->Internals->RequiredProperties.find(function);
  if (iter != this->Internals->RequiredProperties.end())
  {
    return iter->second.GetPointer();
  }
  return 0;
}

//---------------------------------------------------------------------------
void vtkSMDomain::RemoveRequiredProperty(vtkSMProperty* prop)
{
  vtkSMDomainInternals::PropertyMap::iterator iter = this->Internals->RequiredProperties.begin();

  for (; iter != this->Internals->RequiredProperties.end(); iter++)
  {
    if (iter->second.GetPointer() == prop)
    {
      this->Internals->RequiredProperties.erase(iter);
      break;
    }
  }
}

//---------------------------------------------------------------------------
int vtkSMDomain::ReadXMLAttributes(vtkSMProperty* prop, vtkPVXMLElement* element)
{
  assert("Property and proxy should be properly set" && prop && prop->GetParent());
  this->SetSession(prop->GetParent()->GetSession());

  int isOptional;
  int retVal = element->GetScalarAttribute("optional", &isOptional);
  if (retVal)
  {
    this->SetIsOptional(isOptional != 0);
  }

  for (unsigned int i = 0; i < element->GetNumberOfNestedElements(); ++i)
  {
    vtkPVXMLElement* domainEl = element->GetNestedElement(i);
    if (strcmp(domainEl->GetName(), "RequiredProperties") == 0)
    {
      for (unsigned int j = 0; j < domainEl->GetNumberOfNestedElements(); ++j)
      {
        vtkPVXMLElement* reqEl = domainEl->GetNestedElement(j);
        const char* name = reqEl->GetAttribute("name");
        if (name)
        {
          if (prop->GetXMLName() && strcmp(name, prop->GetXMLName()) == 0)
          {
            vtkErrorMacro("A domain can not depend on it's property");
          }
          else
          {
            const char* function = reqEl->GetAttribute("function");
            if (!function)
            {
              vtkErrorMacro("Missing required attribute: function");
            }
            else
            {
              vtkSMProperty* req = prop->NewProperty(name);
              if (req)
              {
                this->AddRequiredProperty(req, function);
              }
              else
              {
                vtkWarningMacro("You have added a domain dependency to a property named '"
                  << name << "' which does not exist.");
              }
            }
          }
        }
      }
    }
  }
  return 1;
}

//---------------------------------------------------------------------------
vtkPVDataInformation* vtkSMDomain::GetInputDataInformation(const char* function, int /*index=0*/)
{
  vtkSMProperty* inputProperty = this->GetRequiredProperty(function);
  if (!inputProperty)
  {
    return NULL;
  }

  vtkSMUncheckedPropertyHelper helper(inputProperty);
  if (helper.GetNumberOfElements() > 0)
  {
    vtkSMSourceProxy* sp = vtkSMSourceProxy::SafeDownCast(helper.GetAsProxy(0));
    if (sp)
    {
      return sp->GetDataInformation(helper.GetOutputPort());
    }
  }

  return NULL;
}

//---------------------------------------------------------------------------
void vtkSMDomain::AddRequiredProperty(vtkSMProperty* prop, const char* function)
{
  if (!prop)
  {
    return;
  }

  if (!function)
  {
    vtkErrorMacro("Missing name of function for new required property.");
    return;
  }

  prop->AddDependent(this);
  this->Internals->RequiredProperties[function] = prop;
}

//---------------------------------------------------------------------------
unsigned int vtkSMDomain::GetNumberOfRequiredProperties()
{
  return static_cast<unsigned int>(this->Internals->RequiredProperties.size());
}

//---------------------------------------------------------------------------
void vtkSMDomain::DomainModified()
{
  this->InvokeEvent(vtkCommand::DomainModifiedEvent, 0);
}

//---------------------------------------------------------------------------
void vtkSMDomain::ChildSaveState(vtkPVXMLElement* /*domainElement*/)
{
}

//---------------------------------------------------------------------------
void vtkSMDomain::SaveState(vtkPVXMLElement* parent, const char* uid)
{
  vtkPVXMLElement* domainElement = vtkPVXMLElement::New();
  domainElement->SetName("Domain");
  domainElement->AddAttribute("name", this->XMLName);
  domainElement->AddAttribute("id", uid);

  this->ChildSaveState(domainElement);

  parent->AddNestedElement(domainElement);
  domainElement->Delete();
}

//---------------------------------------------------------------------------
vtkSMProperty* vtkSMDomain::GetProperty()
{
  return this->Internals->DomainProperty;
}

//---------------------------------------------------------------------------
void vtkSMDomain::SetProperty(vtkSMProperty* prop)
{
  this->Internals->DomainProperty = prop;
}

//---------------------------------------------------------------------------
void vtkSMDomain::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
  os << indent << "XMLName: " << (this->XMLName ? this->XMLName : "(null)") << endl;
  os << indent << "IsOptional: " << this->IsOptional << endl;
  os << indent << "Property: " << this->Internals->DomainProperty.GetPointer() << endl;
}