kicad/include/class_undoredo_container.h

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/*
* This program source code file is part of KICAD, a free EDA CAD application.
*
* Copyright (C) 2009 jean-pierre.charras@gipsa-lab.inpg.fr
* Copyright (C) 2009 Kicad Developers, see change_log.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 <vector>
#include "base_struct.h"
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/**
* @info Undo Redo considerations:
* Basically we have 3 cases
* New item
* Deleted item
* Modified item
* there is also a specfific case in eeschema, when wires are modified
* If an item is modified, a copy of the "old" item parameters value is held.
* When an item is deleted or added (new item) the pointer points the item, and there is
* no other copy.
* However, because there are some commands that concern a lot of items
* and modify them, but modifications are easy tu undo/redo,
* so a copy of old items is not necessary. They are block command
* Move block
* Rotate block
* Mirror or Flip block
* and they are undo/redo by the same command
*/
/* Type of undo/redo operations
* each type must be redo/undoed by a specfic operation
*/
enum UndoRedoOpType {
UR_UNSPECIFIED = 0, // illegal
UR_CHANGED, // params of items have a value changed: undo is made by exchange values with a copy of these values
UR_NEW, // new item, undo by changing in deleted
UR_DELETED, // deleted item, undo by changing in deleted
UR_MOVED, // moved item, undo by move it
UR_MIRRORED_X, // mirrored item, undo by mirror X
UR_MIRRORED_Y, // mirrored item, undo by mirror Y
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UR_ROTATED, // Rotated item (counterclockwise), undo by rotating it
UR_ROTATED_CLOCKWISE, // Rotated item (clockwise), undo by rotating it
UR_FLIPPED, // flipped (board items only), undo by flipping it
UR_WIRE_IMAGE, // Specific to eeschema: handle wires changes
UR_MODEDIT, // Specific to the module editor (modedit creates a full copy of the current module when changed)
UR_LIBEDIT // Specific to the component editor (libedit creates a full copy of the current component when changed)
};
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class ITEM_PICKER
{
public:
UndoRedoOpType m_UndoRedoStatus; /* type of operation to undo/redo for this item */
EDA_BaseStruct* m_PickedItem; /* Pointer on the schematic or board item that is concerned (picked),
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* or in undo redo commands, the copy of an edited item.
*/
KICAD_T m_PickedItemType; /* type of schematic or board item that is concerned
*/
int m_PickerFlags; /* a copy of m_Flags member. usefull in mode/drag undo/redo commands */
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EDA_BaseStruct* m_Link; /* Pointer on an other 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
*/
public:
ITEM_PICKER( EDA_BaseStruct* aItem = NULL,
UndoRedoOpType aUndoRedoStatus = UR_UNSPECIFIED );
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};
/* Class PICKED_ITEMS_LIST
* is a holder to handle information on schematic or board items.
* The information held is a pointer on each item, and the command made.
*/
class PICKED_ITEMS_LIST
{
public:
UndoRedoOpType m_Status; /* info about operation to undo/redo for this item. can be UR_UNSPECIFIED */
wxPoint m_TransformPoint; /* used to undo redo command by the same command:
* we usually need to know the rotate point or the move vector
*/
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private:
std::vector <ITEM_PICKER> m_ItemsList;
public:
PICKED_ITEMS_LIST();
~PICKED_ITEMS_LIST();
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/** PushItem
* push a picker to the top of the list
* @param aItem = picker to push
*/
void PushItem( ITEM_PICKER& aItem );
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/** PopItem
* @return the picker from the top of the list
* the picker is removed from the list
*/
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ITEM_PICKER PopItem();
/** Function ClearItemsList
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* delete only the list of pickers, NOT the picked data itself
*/
void ClearItemsList();
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/** Function ClearListAndDeleteItems
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* delete the list of pickers, AND the data pointed
* by m_PickedItem or m_PickedItemLink, according to the type of undo/redo command recorded
*/
void ClearListAndDeleteItems();
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/** function GetCount()
* @return the count of pickers stored in this list
*/
unsigned GetCount() const
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{
return m_ItemsList.size();
}
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/** function ReversePickersListOrder()
* reverses the order of pickers stored in this list
* Useful when pop a list from Undo to Redo (and vice-versa)
* because sometimes undo (or redo) a command needs to keep the
* order of successive changes.
* and obviously, undo and redo are in reverse order
*/
void ReversePickersListOrder();
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/** function GetItemWrapper
* @return the picker of a picked item
* @param aIdx = index of the picker in the picked list
* if this picker does not exist, a picker is returned,
* with its members set to 0 or NULL
*/
ITEM_PICKER GetItemWrapper( unsigned int aIdx );
/** function GetPickedItem
* @return a pointer to the picked item
* @param aIdx = index of the picked item in the picked list
*/
EDA_BaseStruct* GetPickedItem( unsigned int aIdx );
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/** function GetPickedItemLink
* @return link of the picked item, or null if does not exist
* @param aIdx = index of the picked item in the picked list
*/
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EDA_BaseStruct* GetPickedItemLink( unsigned int aIdx );
/** function GetPickedItemStatus
* @return the type of undo/redo opertaion associated to the picked item,
* or UR_UNSPECIFIED if does not exist
* @param aIdx = index of the picked item in the picked list
*/
UndoRedoOpType GetPickedItemStatus( unsigned int aIdx );
/** function GetPickerFlags
* return the value of the picker flag
* @param aIdx = index of the picker in the picked list
* @return the value stored in the picker, if the picker exists, or 0 if does not exist
*/
int GetPickerFlags( unsigned aIdx );
/** function SetPickedItem
* @param aItem = a pointer to the item to pick
* @param aIdx = index of the picker in the picked list
* @return true if the pixker exists, or false if does not exist
*/
bool SetPickedItem( EDA_BaseStruct* aItem, unsigned aIdx );
/** function SetPickedItem
* @param aItem = a pointer to the item to pick
* @param aStatus = the type of undo/redo operation associated to the item to pick
* @param aIdx = index of the picker in the picked list
* @return true if the pixker exists, or false if does not exist
*/
bool SetPickedItem( EDA_BaseStruct* aItem, UndoRedoOpType aStatus, unsigned aIdx );
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/** function SetPickedItemLink
* Set the link associated to a given picked item
* @param aLink = the link to the item associated to the picked item
* @param aIdx = index of the picker in the picked list
* @return true if the pixker exists, or false if does not exist
*/
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bool SetPickedItemLink( EDA_BaseStruct* aLink, unsigned aIdx );
/** function SetPickedItemStatus
* Set the type of undo/redo operation for a given picked item
* @param aStatus = the type of undo/redo operation associated to the picked item
* @param aIdx = index of the picker in the picked list
* @return true if the picker exists, or false if does not exist
*/
bool SetPickedItemStatus( UndoRedoOpType aStatus, unsigned aIdx );
/** function SetPickerFlags
* Set the flags of the picker (usually to the picked item m_Flags value)
* @param aFlags = the value to save in picker
* @param aIdx = index of the picker in the picked list
* @return true if the picker exists, or false if does not exist
*/
bool SetPickerFlags( int aFlags, unsigned aIdx );
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/** function RemovePicker
* remove one entry (one picker) from the list of picked items
* @param aIdx = index of the picker in the picked list
* @return true if ok, or false if did not exist
*/
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bool RemovePicker( unsigned aIdx );
/** Function CopyList
* copy all data from aSource
* Items picked are not copied. just pointer on them are copied
*/
void CopyList( const PICKED_ITEMS_LIST& aSource );
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};
/**
* Class UNDO_REDO_CONTAINER
* is a holder to handle alist of undo (or redo) command.
* this class handles a list of ITEM_PICKER (each manage one schematic or board item).
*/
class UNDO_REDO_CONTAINER
{
public:
std::vector <PICKED_ITEMS_LIST*> m_CommandsList; // the list of possible undo/redo commands
public:
UNDO_REDO_CONTAINER();
~UNDO_REDO_CONTAINER();
void PushCommand( PICKED_ITEMS_LIST* aCommand );
PICKED_ITEMS_LIST* PopCommand();
void ClearCommandList();
};
#endif // _CLASS_UNDOREDO_CONTAINER_H