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/**
* @file pl_editor_undo_redo.cpp
* @brief page layout editor: undo and redo functions
*/
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013 Jean-Pierre Charras, jp.charras at wanadoo.fr
* Copyright (C) 1992-2013 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <fctsys.h>
#include <class_drawpanel.h>
#include <macros.h>
#include <worksheet_shape_builder.h>
#include <pl_editor_frame.h>
/* Note: the Undo/redo commands use a "brute" method:
* the full page layout is converted to a S expression, and saved as string.
* When a previous version is needed, the old string is parsed,
* and the description replaces the current desc, just like reading a new file
*
* This is not optimal from the memory point of view, but:
* - the descriptions are never very long (max few thousand of bytes)
* - this is very easy to code
*/
// A helper class used in undo/redo commad:
class PL_ITEM_LAYOUT: public EDA_ITEM
{
public:
wxString m_Layout;
public:
PL_ITEM_LAYOUT() : EDA_ITEM( TYPE_PL_EDITOR_LAYOUT ) {}
// Required to keep compiler happy on debug builds.
#if defined(DEBUG)
virtual void Show( int nestLevel, std::ostream& os ) const {}
#endif
};
void PL_EDITOR_FRAME::SaveCopyInUndoList()
{
PL_ITEM_LAYOUT* copyItem = new PL_ITEM_LAYOUT;
WORKSHEET_LAYOUT& pglayout = WORKSHEET_LAYOUT::GetTheInstance();
pglayout.SaveInString( copyItem->m_Layout );
PICKED_ITEMS_LIST* lastcmd = new PICKED_ITEMS_LIST();
ITEM_PICKER wrapper( copyItem, UR_LIBEDIT );
lastcmd->PushItem(wrapper);
GetScreen()->PushCommandToUndoList( lastcmd );
// Clear redo list, because after new save there is no redo to do.
GetScreen()->ClearUndoORRedoList( GetScreen()->m_RedoList );
}
/* Redo the last edition:
* - Place the current edited layout in undo list
* - Get previous version of the current edited layput
*/
void PL_EDITOR_FRAME::GetLayoutFromRedoList( wxCommandEvent& event )
{
if ( GetScreen()->GetRedoCommandCount() <= 0 )
return;
PICKED_ITEMS_LIST* lastcmd = new PICKED_ITEMS_LIST();
PL_ITEM_LAYOUT* copyItem = new PL_ITEM_LAYOUT;
WORKSHEET_LAYOUT& pglayout = WORKSHEET_LAYOUT::GetTheInstance();
pglayout.SaveInString( copyItem->m_Layout );
ITEM_PICKER wrapper( copyItem, UR_LIBEDIT );
lastcmd->PushItem( wrapper );
GetScreen()->PushCommandToUndoList( lastcmd );
lastcmd = GetScreen()->PopCommandFromRedoList();
wrapper = lastcmd->PopItem();
copyItem = (PL_ITEM_LAYOUT*)wrapper.GetItem();
pglayout.SetPageLayout( TO_UTF8(copyItem->m_Layout) );
delete copyItem;
OnModify();
RebuildDesignTree();
m_canvas->Refresh();
}
/* Undo the last edition:
* - Place the current layout in Redo list
* - Get previous version of the current edited layout
*/
void PL_EDITOR_FRAME::GetLayoutFromUndoList( wxCommandEvent& event )
{
if ( GetScreen()->GetUndoCommandCount() <= 0 )
return;
PICKED_ITEMS_LIST* lastcmd = new PICKED_ITEMS_LIST();
PL_ITEM_LAYOUT* copyItem = new PL_ITEM_LAYOUT;
WORKSHEET_LAYOUT& pglayout = WORKSHEET_LAYOUT::GetTheInstance();
pglayout.SaveInString( copyItem->m_Layout );
ITEM_PICKER wrapper( copyItem, UR_LIBEDIT );
lastcmd->PushItem( wrapper );
GetScreen()->PushCommandToRedoList( lastcmd );
lastcmd = GetScreen()->PopCommandFromUndoList();
wrapper = lastcmd->PopItem();
copyItem = (PL_ITEM_LAYOUT*)wrapper.GetItem();
pglayout.SetPageLayout( TO_UTF8(copyItem->m_Layout) );
delete copyItem;
OnModify();
RebuildDesignTree();
m_canvas->Refresh();
}
/* Remove the last command in Undo List.
* Used to clean the uUndo stack after a cancel command
*/
void PL_EDITOR_FRAME::RemoveLastCommandInUndoList()
{
if ( GetScreen()->GetUndoCommandCount() <= 0 )
return;
PICKED_ITEMS_LIST* lastcmd = GetScreen()->PopCommandFromUndoList();
ITEM_PICKER wrapper = lastcmd->PopItem();
PL_ITEM_LAYOUT* copyItem = (PL_ITEM_LAYOUT*)wrapper.GetItem();
delete copyItem;
}
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