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/*=========================================================================
Program: ParaView
Module: vtkUndoSet.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 "vtkUndoSet.h"
#include "vtkCollection.h"
#include "vtkCollectionIterator.h"
#include "vtkObjectFactory.h"
#include "vtkPVXMLElement.h"
#include "vtkUndoElement.h"
vtkStandardNewMacro(vtkUndoSet);
//-----------------------------------------------------------------------------
vtkUndoSet::vtkUndoSet()
{
this->Collection = vtkCollection::New();
this->TmpWorkingCollection = vtkCollection::New();
}
//-----------------------------------------------------------------------------
vtkUndoSet::~vtkUndoSet()
{
this->Collection->Delete();
this->TmpWorkingCollection->Delete();
}
//-----------------------------------------------------------------------------
int vtkUndoSet::AddElement(vtkUndoElement* elem)
{
int num_elements = this->Collection->GetNumberOfItems();
if (elem->GetMergeable() && num_elements > 0)
{
vtkUndoElement* prev = vtkUndoElement::SafeDownCast(
this->Collection->GetItemAsObject(num_elements-1));
if (prev && prev->GetMergeable())
{
if (prev->Merge(elem))
{
// merge was successful, return index of the merge.
return (num_elements-1);
}
}
}
this->Collection->AddItem(elem);
return num_elements;
}
//-----------------------------------------------------------------------------
void vtkUndoSet::RemoveElement(int index)
{
this->Collection->RemoveItem(index);
}
//-----------------------------------------------------------------------------
vtkUndoElement* vtkUndoSet::GetElement(int index)
{
return vtkUndoElement::SafeDownCast(this->Collection->GetItemAsObject(index));
}
//-----------------------------------------------------------------------------
void vtkUndoSet::RemoveAllElements()
{
this->Collection->RemoveAllItems();
}
//-----------------------------------------------------------------------------
int vtkUndoSet::GetNumberOfElements()
{
return this->Collection->GetNumberOfItems();
}
//-----------------------------------------------------------------------------
int vtkUndoSet::Redo()
{
int max = this->Collection->GetNumberOfItems();
for (int cc=0; cc <max; cc++)
{
vtkUndoElement* elem = vtkUndoElement::SafeDownCast(
this->Collection->GetItemAsObject(cc));
// Init working context
elem->SetUndoSetWorkingContext(this->TmpWorkingCollection);
if (!elem->Redo())
{
vtkDebugMacro("Redo Action is failing. Start redoing the actions.");
// redo failed, undo the half redone operations.
for (int rr=cc-1; rr >=0; --rr)
{
vtkUndoElement* elemU = vtkUndoElement::SafeDownCast(
this->Collection->GetItemAsObject(rr));
elemU->SetUndoSetWorkingContext(this->TmpWorkingCollection); // Init
elemU->Undo();
elemU->SetUndoSetWorkingContext(0); // Clear Working context
}
// Release ref of tmp objects
this->TmpWorkingCollection->RemoveAllItems();
return 0;
}
elem->SetUndoSetWorkingContext(0); // Clear Working context
}
// Release ref of tmp objects
this->TmpWorkingCollection->RemoveAllItems();
return 1;
}
//-----------------------------------------------------------------------------
int vtkUndoSet::Undo()
{
int max = this->Collection->GetNumberOfItems();
for (int cc=max-1; cc >=0; --cc)
{
vtkUndoElement* elem = vtkUndoElement::SafeDownCast(
this->Collection->GetItemAsObject(cc));
// Init working context
elem->SetUndoSetWorkingContext(this->TmpWorkingCollection);
if (!elem->Undo())
{
vtkDebugMacro("Undo Action is failing. Start redoing the actions.");
// undo failed, redo the half undone operations.
for (int rr=0; rr <cc; ++rr)
{
vtkUndoElement* elemR = vtkUndoElement::SafeDownCast(
this->Collection->GetItemAsObject(rr));
elemR->SetUndoSetWorkingContext(this->TmpWorkingCollection); // Init
elemR->Redo();
elemR->SetUndoSetWorkingContext(0); // Clear Working context
}
// Release ref of tmp objects
this->TmpWorkingCollection->RemoveAllItems();
return 0;
}
elem->SetUndoSetWorkingContext(0); // Clear Working context
}
// Release ref of tmp objects
this->TmpWorkingCollection->RemoveAllItems();
return 1;
}
//-----------------------------------------------------------------------------
void vtkUndoSet::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
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