UndoStackManager.cpp

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/*  Copyright (C) 2008 National Institute For Space Research (INPE) - Brazil.

    This file is part of the TerraLib - a Framework for building GIS enabled applications.

    TerraLib is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License,
    or (at your option) any later version.

    TerraLib is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with TerraLib. See COPYING. If not, write to
    TerraLib Team at <terralib-team@terralib.org>.
*/

/*!
\file terralib/edit/qt/core/UndoStackManager.cpp

\brief This class manager the undo stack.
*/

// TerraLib
#include "../../../common/STLUtils.h"
#include "../../../dataaccess/dataset/ObjectId.h"
#include "../../../qt/widgets/canvas/MapDisplay.h"
#include "../../../qt/widgets/Utils.h"
#include "../../Feature.h"
#include "../../Utils.h"
#include "../Renderer.h"
#include "../Utils.h"
#include "UndoStackManager.h"

//QT
#include <QUndoCommand>
#include <QUndoStack>

te::edit::UndoStackManager::UndoStackManager()
: m_currentIndex(0),
  m_undoStack(nullptr)
{}

te::edit::UndoStackManager::~UndoStackManager()
{
  te::common::FreeContents(m_addWatches);
  m_addWatches.clear();

  delete m_undoStack;
}

void te::edit::UndoStackManager::addUndoStack(QUndoCommand* command)
{
  if (m_undoStack == nullptr)
    return;

  m_undoStack->push(command);
}

QUndoStack* te::edit::UndoStackManager::getUndoStack()
{
  if (m_undoStack == nullptr)
  {
    m_undoStack = new QUndoStack(); 
  }

  return m_undoStack;
}

const std::vector<te::edit::Feature*>& te::edit::UndoStackManager::getAddWatches() const
{
  return m_addWatches;
}

void te::edit::UndoStackManager::addWatch(te::edit::Feature* feature)
{
  m_addWatches.push_back(feature);

  //If a feature is changed in the middle of the stack, this change ends up being the top of the stack
  if (m_currentIndex < (int)(m_addWatches.size() - 2))
  {
    std::size_t i = 0;
    while (i < m_addWatches.size())
    {
      m_addWatches.pop_back();
      i = (m_currentIndex + 1);
    }
    m_addWatches.push_back(feature);
  }

  m_currentIndex = (int)(m_addWatches.size() - 1);
}

void te::edit::UndoStackManager::reset()
{
  te::common::FreeContents(m_addWatches);

  m_addWatches.clear();

  m_undoStack->clear();
}