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/*
* This file is part of wxSmith plugin for Code::Blocks Studio
* Copyright (C) 2006-2007 Bartlomiej Swiecki
*
* wxSmith is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* wxSmith 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wxSmith. If not, see <http://www.gnu.org/licenses/>.
*
* $Revision: 7109 $
* $Id: wxsitemundobuffer.cpp 7109 2011-04-15 11:53:16Z mortenmacfly $
* $HeadURL: http://svn.code.sf.net/p/codeblocks/code/branches/release-16.xx/src/plugins/contrib/wxSmith/wxwidgets/wxsitemundobuffer.cpp $
*/
#include "wxsitemundobuffer.h"
namespace
{
wxString Empty = wxEmptyString;
}
wxsItemUndoBuffer::wxsItemUndoBuffer(int MaxEnteries):
m_CurrentPos(0),
m_SavedPos(0),
m_MaxEnteries(MaxEnteries)
{
}
wxsItemUndoBuffer::~wxsItemUndoBuffer()
{
}
void wxsItemUndoBuffer::StoreChange(const wxString& XmlData)
{
// Removing all undo points after current one
if ( m_CurrentPos < GetCount()-1 )
{
m_Enteries.RemoveAt(m_CurrentPos+1,GetCount()-m_CurrentPos-1);
}
// Removing all outdated undos
if ( m_MaxEnteries > 0 )
{
int ToRemove = GetCount()-m_MaxEnteries;
if ( ToRemove > 0 )
{
m_Enteries.RemoveAt(0,ToRemove);
m_CurrentPos -= ToRemove;
m_SavedPos -= ToRemove;
}
}
m_Enteries.Add(XmlData);
m_CurrentPos = GetCount()-1;
}
const wxString& wxsItemUndoBuffer::Undo()
{
if ( m_CurrentPos == 0 ) return Empty;
return m_Enteries[--m_CurrentPos];
}
const wxString& wxsItemUndoBuffer::Redo()
{
if ( m_CurrentPos >= GetCount() - 1 ) return Empty;
return m_Enteries[++m_CurrentPos];
}
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