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/*=========================================================================
Program: ParaView
Module: vtkUndoStack.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 "vtkUndoStack.h"
#include "vtkCommand.h"
#include "vtkObjectFactory.h"
#include "vtkUndoStackInternal.h"
vtkStandardNewMacro(vtkUndoStack);
//-----------------------------------------------------------------------------
vtkUndoStack::vtkUndoStack()
{
this->Internal = new vtkUndoStackInternal;
this->InUndo = false;
this->InRedo = false;
this->StackDepth = 10;
}
//-----------------------------------------------------------------------------
vtkUndoStack::~vtkUndoStack()
{
delete this->Internal;
}
//-----------------------------------------------------------------------------
void vtkUndoStack::Clear()
{
this->Internal->UndoStack.clear();
this->Internal->RedoStack.clear();
this->InvokeEvent(vtkUndoStack::UndoSetClearedEvent);
this->Modified();
}
//-----------------------------------------------------------------------------
void vtkUndoStack::Push(const char* label, vtkUndoSet* changeSet)
{
this->Internal->RedoStack.clear();
while (this->Internal->UndoStack.size() >=
static_cast<unsigned int>(this->StackDepth) && this->StackDepth > 0)
{
this->Internal->UndoStack.erase(this->Internal->UndoStack.begin());
this->InvokeEvent(vtkUndoStack::UndoSetRemovedEvent);
}
this->Internal->UndoStack.push_back(
vtkUndoStackInternal::Element(label, changeSet));
this->Modified();
}
//-----------------------------------------------------------------------------
unsigned int vtkUndoStack::GetNumberOfUndoSets()
{
return static_cast<unsigned int>(this->Internal->UndoStack.size());
}
//-----------------------------------------------------------------------------
unsigned int vtkUndoStack::GetNumberOfRedoSets()
{
return static_cast<unsigned int>(this->Internal->RedoStack.size());
}
//-----------------------------------------------------------------------------
const char* vtkUndoStack::GetUndoSetLabel(unsigned int position)
{
if (position >= this->Internal->UndoStack.size())
{
return NULL;
}
position = (static_cast<unsigned int>(
this->Internal->UndoStack.size()) - position) -1;
return this->Internal->UndoStack[position].Label.c_str();
}
//-----------------------------------------------------------------------------
const char* vtkUndoStack::GetRedoSetLabel(unsigned int position)
{
if (position >= this->Internal->RedoStack.size())
{
return NULL;
}
position = (static_cast<unsigned int>(
this->Internal->RedoStack.size()) - position) -1;
return this->Internal->RedoStack[position].Label.c_str();
}
//-----------------------------------------------------------------------------
int vtkUndoStack::Undo()
{
if (this->Internal->UndoStack.empty())
{
return 0;
}
this->InUndo = true;
this->InvokeEvent(vtkCommand::StartEvent);
int status = this->Internal->UndoStack.back().UndoSet.GetPointer()->Undo();
if (status)
{
this->PopUndoStack();
}
this->InvokeEvent(vtkCommand::EndEvent);
this->InUndo = false;
return status;
}
//-----------------------------------------------------------------------------
int vtkUndoStack::Redo()
{
if (this->Internal->RedoStack.empty())
{
return 0;
}
this->InRedo = true;
this->InvokeEvent(vtkCommand::StartEvent);
int status = this->Internal->RedoStack.back().UndoSet.GetPointer()->Redo();
if (status)
{
this->PopRedoStack();
}
this->InvokeEvent(vtkCommand::EndEvent);
this->InRedo = false;
return status;
}
//-----------------------------------------------------------------------------
void vtkUndoStack::PopUndoStack()
{
if (this->Internal->UndoStack.empty())
{
return;
}
this->Internal->RedoStack.push_back(this->Internal->UndoStack.back());
this->Internal->UndoStack.pop_back();
this->Modified();
}
//-----------------------------------------------------------------------------
void vtkUndoStack::PopRedoStack()
{
if (this->Internal->RedoStack.empty())
{
return;
}
this->Internal->UndoStack.push_back(this->Internal->RedoStack.back());
this->Internal->RedoStack.pop_back();
this->Modified();
}
//-----------------------------------------------------------------------------
vtkUndoSet* vtkUndoStack::GetNextUndoSet()
{
if (!this->CanUndo())
{
return NULL;
}
return this->Internal->UndoStack.back().UndoSet.GetPointer();
}
//-----------------------------------------------------------------------------
vtkUndoSet* vtkUndoStack::GetNextRedoSet()
{
if (!this->CanRedo())
{
return NULL;
}
return this->Internal->RedoStack.back().UndoSet.GetPointer();
}
//-----------------------------------------------------------------------------
void vtkUndoStack::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "InUndo: " << this->InUndo << endl;
os << indent << "InRedo: " << this->InRedo << endl;
os << indent << "StackDepth: " << this->StackDepth << endl;
}
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