kicad/include/undo_redo_container.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
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*
* Copyright (C) 2009 jean-pierre.charras@gipsa-lab.inpg.fr
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* Copyright (C) 2011 Wayne Stambaugh <stambaughw@gmail.com>
* Copyright (C) 2009-2020 KiCad Developers, see AUTHORS.txt for contributors.
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*
* 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 <eda_item.h>
class PICKED_ITEMS_LIST;
class BASE_SCREEN;
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/**
* Undo Redo considerations:
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* Basically we have 3 cases
* New item
* Deleted item
* Modified item
* there is also a specific case in Eeschema, when wires are modified
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* 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.
*/
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/**
* Type of undo/redo operations
*
* Each type must be redo/undone by a specific operation.
*/
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enum class UNDO_REDO {
UNSPECIFIED = 0, // illegal
NOP, // Undo/redo will ignore this entry. Only forces the start of a new stack
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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
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LIBEDIT, // Specific to the component editor (symbol_editor creates a full copy
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// 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
GROUP,
UNGROUP
};
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class ITEM_PICKER
{
public:
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// ITEM_PICKER( EDA_ITEM* aItem = NULL, UNDO_REDO aStatus = UNSPECIFIED );
ITEM_PICKER();
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ITEM_PICKER( BASE_SCREEN* aScreen, EDA_ITEM* aItem,
UNDO_REDO aStatus = UNDO_REDO::UNSPECIFIED );
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EDA_ITEM* GetItem() const { return m_pickedItem; }
void SetItem( EDA_ITEM* aItem )
{
m_pickedItem = aItem;
m_pickedItemType = aItem ? aItem->Type() : TYPE_NOT_INIT;
}
KICAD_T GetItemType() const { return m_pickedItemType; }
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void SetStatus( UNDO_REDO aStatus ) { m_undoRedoStatus = aStatus; }
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UNDO_REDO GetStatus() const { return m_undoRedoStatus; }
void SetFlags( STATUS_FLAGS aFlags ) { m_pickerFlags = aFlags; }
STATUS_FLAGS GetFlags() const { return m_pickerFlags; }
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void SetLink( EDA_ITEM* aItem ) { m_link = aItem; }
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EDA_ITEM* GetLink() const { return m_link; }
BASE_SCREEN* GetScreen() const { return m_screen; }
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private:
STATUS_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. */
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};
/**
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* A holder to handle information on schematic or board items.
*
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* The information held is a pointer on each item, and the command made.
*/
class PICKED_ITEMS_LIST
{
private:
std::vector <ITEM_PICKER> m_ItemsList;
public:
PICKED_ITEMS_LIST();
~PICKED_ITEMS_LIST();
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/**
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* Push \a aItem to the top of the list.
*
* @param aItem Picker to push on to the list.
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*/
void PushItem( const ITEM_PICKER& aItem );
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/**
* @return The picker removed from the top of the list.
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*/
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ITEM_PICKER PopItem();
/**
* @return True if \a aItem is found in the pick list.
*/
bool ContainsItem( const EDA_ITEM* aItem ) const;
/**
* @return Index of the searched item. If the item is not stored in the list, negative value
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* is returned.
*/
int FindItem( const EDA_ITEM* aItem ) const;
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/**
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* Delete only the list of pickers NOT the picked data itself.
*/
void ClearItemsList();
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/**
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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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/**
* @return The count of pickers stored in this list.
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*/
unsigned GetCount() const
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{
return m_ItemsList.size();
}
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/**
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* Reverse the order of pickers stored in this list.
*
* This is 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. Obviously, undo and redo are in reverse order
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*/
void ReversePickersListOrder();
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/**
* @return The picker of a picked item.
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* @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 ) const;
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/**
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* @return A pointer to the picked item.
* @param aIdx Index of the picked item in the picked list.
*/
EDA_ITEM* GetPickedItem( unsigned int aIdx ) const;
/**
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* @return A pointer to the picked item's sceen.
* @param aIdx Index of the picked item in the picked list.
*/
BASE_SCREEN* GetScreenForItem( unsigned int aIdx ) const;
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/**
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* @return link of the picked item, or null if does not exist.
* @param aIdx Index of the picked item in the picked list.
*/
EDA_ITEM* GetPickedItemLink( unsigned int aIdx ) const;
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/**
* @return The type of undo/redo operation associated to the picked item,
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* or UNSPECIFIED if does not exist.
* @param aIdx Index of the picked item in the picked list.
*/
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UNDO_REDO GetPickedItemStatus( unsigned int aIdx ) const;
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/**
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* 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.
*/
STATUS_FLAGS GetPickerFlags( unsigned aIdx ) const;
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/**
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* @param aItem A pointer to the item to pick.
* @param aIdx Index of the picker in the picked list.
* @return True if the picker exists or false if does not exist.
*/
bool SetPickedItem( EDA_ITEM* aItem, unsigned aIdx );
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/**
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* @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 picker exists or false if does not exist.
*/
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bool SetPickedItem( EDA_ITEM* aItem, UNDO_REDO aStatus, unsigned aIdx );
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/**
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* Set the link associated to a given picked item.
*
* @param aLink is the link to the item associated to the picked item.
* @param aIdx is index of the picker in the picked list.
* @return true if the picker exists, or false if does not exist.
*/
bool SetPickedItemLink( EDA_ITEM* aLink, unsigned aIdx );
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/**
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* 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
*/
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bool SetPickedItemStatus( UNDO_REDO aStatus, unsigned aIdx );
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/**
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* Set the flags of the picker (usually to the picked item m_flags value).
*
* @param aFlags The flag 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( STATUS_FLAGS aFlags, unsigned aIdx );
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/**
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* 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.
*/
bool RemovePicker( unsigned aIdx );
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/**
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* Copy all data from aSource to the list.
*
* Items picked are not copied. just pointer in them are copied.
*
* @param aSource The list of items to copy to the list.
*/
void CopyList( const PICKED_ITEMS_LIST& aSource );
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};
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/**
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* A holder to handle a list of undo (or redo) commands.
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*/
class UNDO_REDO_CONTAINER
{
public:
UNDO_REDO_CONTAINER();
~UNDO_REDO_CONTAINER();
void PushCommand( PICKED_ITEMS_LIST* aCommand );
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PICKED_ITEMS_LIST* PopCommand();
void ClearCommandList();
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std::vector <PICKED_ITEMS_LIST*> m_CommandsList; // the list of possible undo/redo commands
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};
#endif // _CLASS_UNDOREDO_CONTAINER_H