undo_redo_container.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2009 [email protected]
 * Copyright (C) 2011 Wayne Stambaugh <[email protected]>
 * Copyright (C) 2009-2021 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
 */

#ifndef _CLASS_UNDOREDO_CONTAINER_H
#define _CLASS_UNDOREDO_CONTAINER_H

#include <core/typeinfo.h>
#include <eda_item_flags.h>
#include <vector>

class EDA_ITEM;
class PICKED_ITEMS_LIST;
class BASE_SCREEN;


enum class UNDO_REDO {
 UNSPECIFIED = 0, // illegal
 NOP, // Undo/redo will ignore this entry. Only forces the start of a new stack
 CHANGED, // params of items have a value changed: undo is made by exchange
 // values with a copy of these values
 NEWITEM, // new item, undo by changing in deleted
 DELETED, // deleted item, undo by changing in deleted
 LIBEDIT, // Specific to the component editor (symbol_editor creates a full copy
 // of the current component when changed)
 LIB_RENAME, // As LIBEDIT, but old copy should be removed from library
 EXCHANGE_T, // Use for changing the schematic text type where swapping
 // data structure is insufficient to restore the change.
 DRILLORIGIN, // origin changed (like CHANGED, contains the origin and a copy)
 GRIDORIGIN, // origin changed (like CHANGED, contains the origin and a copy)
 PAGESETTINGS, // page settings or title block changes
 REGROUP, // new group of items created (do not use GROUP to avoid collision
 // with an header on msys2)
 UNGROUP // existing group destroyed (items not destroyed)
};


class ITEM_PICKER
{
public:
// ITEM_PICKER( EDA_ITEM* aItem = NULL, UNDO_REDO aStatus = UNSPECIFIED );
 ITEM_PICKER();
 ITEM_PICKER( BASE_SCREEN* aScreen, EDA_ITEM* aItem,
 UNDO_REDO aStatus = UNDO_REDO::UNSPECIFIED );

 EDA_ITEM* GetItem() const { return m_pickedItem; }

 void SetItem( EDA_ITEM* aItem );

 KICAD_T GetItemType() const { return m_pickedItemType; }

 void SetStatus( UNDO_REDO aStatus ) { m_undoRedoStatus = aStatus; }

 UNDO_REDO GetStatus() const { return m_undoRedoStatus; }

 void SetFlags( EDA_ITEM_FLAGS aFlags ) { m_pickerFlags = aFlags; }

 EDA_ITEM_FLAGS GetFlags() const { return m_pickerFlags; }

 void SetLink( EDA_ITEM* aItem ) { m_link = aItem; }

 EDA_ITEM* GetLink() const { return m_link; }

 BASE_SCREEN* GetScreen() const { return m_screen; }

private:
 EDA_ITEM_FLAGS m_pickerFlags; /* a copy of m_flags member. useful in mode/drag
 * undo/redo commands */
 UNDO_REDO m_undoRedoStatus; /* type of operation to undo/redo for this item */
 EDA_ITEM* m_pickedItem; /* Pointer on the schematic or board item that is concerned
 * (picked), or in undo redo commands, the copy of an
 * edited item. */
 KICAD_T m_pickedItemType; /* type of schematic or board item that is concerned */

 EDA_ITEM* m_link; /* Pointer on another item. Used in undo redo command
 * used when a duplicate exists i.e. when an item is
 * modified, and the copy of initial item exists (the
 * duplicate) m_Item points the duplicate (i.e the old
 * copy of an active item) and m_Link points the active
 * item in schematic */

 BASE_SCREEN* m_screen; /* For new and deleted items the screen the item should
 * be added to/removed from. */

};


class PICKED_ITEMS_LIST
{
private:
 std::vector <ITEM_PICKER> m_ItemsList;

public:
 PICKED_ITEMS_LIST();
 ~PICKED_ITEMS_LIST();

 void PushItem( const ITEM_PICKER& aItem );

 ITEM_PICKER PopItem();

 bool ContainsItem( const EDA_ITEM* aItem ) const;

 int FindItem( const EDA_ITEM* aItem ) const;

 void ClearItemsList();

 void ClearListAndDeleteItems();

 unsigned GetCount() const
 {
 return m_ItemsList.size();
 }

 void ReversePickersListOrder();

 ITEM_PICKER GetItemWrapper( unsigned int aIdx ) const;

 EDA_ITEM* GetPickedItem( unsigned int aIdx ) const;

 BASE_SCREEN* GetScreenForItem( unsigned int aIdx ) const;

 EDA_ITEM* GetPickedItemLink( unsigned int aIdx ) const;

 UNDO_REDO GetPickedItemStatus( unsigned int aIdx ) const;

 EDA_ITEM_FLAGS GetPickerFlags( unsigned aIdx ) const;

 bool SetPickedItem( EDA_ITEM* aItem, unsigned aIdx );

 bool SetPickedItem( EDA_ITEM* aItem, UNDO_REDO aStatus, unsigned aIdx );

 bool SetPickedItemLink( EDA_ITEM* aLink, unsigned aIdx );

 bool SetPickedItemStatus( UNDO_REDO aStatus, unsigned aIdx );

 bool SetPickerFlags( EDA_ITEM_FLAGS aFlags, unsigned aIdx );

 bool RemovePicker( unsigned aIdx );

 void CopyList( const PICKED_ITEMS_LIST& aSource );
};


class UNDO_REDO_CONTAINER
{
public:
 UNDO_REDO_CONTAINER();
 ~UNDO_REDO_CONTAINER();

 void PushCommand( PICKED_ITEMS_LIST* aCommand );

 PICKED_ITEMS_LIST* PopCommand();

 void ClearCommandList();

 std::vector <PICKED_ITEMS_LIST*> m_CommandsList; // the list of possible undo/redo commands
};


#endif // _CLASS_UNDOREDO_CONTAINER_H