313 lines
11 KiB
C++
313 lines
11 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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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>
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* Copyright (C) 2009-2021 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef _CLASS_UNDOREDO_CONTAINER_H
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#define _CLASS_UNDOREDO_CONTAINER_H
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#include <core/typeinfo.h>
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#include <eda_item_flags.h>
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#include <vector>
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class EDA_ITEM;
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class PICKED_ITEMS_LIST;
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class BASE_SCREEN;
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/**
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* Undo Redo considerations:
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* Basically we have 3 cases
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* New item
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* Deleted item
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* Modified item
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* 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.
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* When an item is deleted or added (new item) the pointer points the item, and there is
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* no other copy.
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*/
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/**
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* Type of undo/redo operations
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*
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* Each type must be redo/undone by a specific operation.
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*/
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enum class UNDO_REDO {
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UNSPECIFIED = 0, // illegal
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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
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// values with a copy of these values
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NEWITEM, // new item, undo by changing in deleted
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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)
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LIB_RENAME, // As LIBEDIT, but old copy should be removed from library
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EXCHANGE_T, // Use for changing the schematic text type where swapping
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// data structure is insufficient to restore the change.
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DRILLORIGIN, // origin changed (like CHANGED, contains the origin and a copy)
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GRIDORIGIN, // origin changed (like CHANGED, contains the origin and a copy)
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PAGESETTINGS, // page settings or title block changes
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REGROUP, // new group of items created (do not use GROUP to avoid collision
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// with an header on msys2)
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UNGROUP // existing group destroyed (items not destroyed)
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};
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class ITEM_PICKER
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{
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public:
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// ITEM_PICKER( EDA_ITEM* aItem = NULL, UNDO_REDO aStatus = UNSPECIFIED );
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ITEM_PICKER();
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ITEM_PICKER( BASE_SCREEN* aScreen, EDA_ITEM* aItem,
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UNDO_REDO aStatus = UNDO_REDO::UNSPECIFIED );
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EDA_ITEM* GetItem() const { return m_pickedItem; }
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void SetItem( EDA_ITEM* aItem );
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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; }
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void SetFlags( EDA_ITEM_FLAGS aFlags ) { m_pickerFlags = aFlags; }
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EDA_ITEM_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; }
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BASE_SCREEN* GetScreen() const { return m_screen; }
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private:
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EDA_ITEM_FLAGS m_pickerFlags; /* a copy of m_flags member. useful in mode/drag
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* undo/redo commands */
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UNDO_REDO m_undoRedoStatus; /* type of operation to undo/redo for this item */
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EDA_ITEM* m_pickedItem; /* Pointer on the schematic or board item that is concerned
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* (picked), or in undo redo commands, the copy of an
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* edited item. */
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KICAD_T m_pickedItemType; /* type of schematic or board item that is concerned */
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EDA_ITEM* m_link; /* Pointer on another item. Used in undo redo command
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* used when a duplicate exists i.e. when an item is
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* modified, and the copy of initial item exists (the
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* duplicate) m_Item points the duplicate (i.e the old
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* copy of an active item) and m_Link points the active
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* item in schematic */
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BASE_SCREEN* m_screen; /* For new and deleted items the screen the item should
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* be added to/removed from. */
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};
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/**
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* A holder to handle information on schematic or board items.
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*
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* The information held is a pointer on each item, and the command made.
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*/
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class PICKED_ITEMS_LIST
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{
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private:
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std::vector <ITEM_PICKER> m_ItemsList;
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public:
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PICKED_ITEMS_LIST();
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~PICKED_ITEMS_LIST();
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/**
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* Push \a aItem to the top of the list.
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*
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* @param aItem Picker to push on to the list.
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*/
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void PushItem( const ITEM_PICKER& aItem );
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/**
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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();
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/**
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* @return True if \a aItem is found in the pick list.
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*/
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bool ContainsItem( const EDA_ITEM* aItem ) const;
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/**
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* @return Index of the searched item. If the item is not stored in the list, negative value
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* is returned.
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*/
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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.
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*/
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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
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* according to the type of undo/redo command recorded.
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*/
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void ClearListAndDeleteItems();
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/**
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* @return The count of pickers stored in this list.
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*/
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unsigned GetCount() const
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{
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return m_ItemsList.size();
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}
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/**
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* Reverse the order of pickers stored in this list.
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*
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* This is useful when pop a list from Undo to Redo (and vice-versa) because
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* sometimes undo (or redo) a command needs to keep the order of successive
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* changes. Obviously, undo and redo are in reverse order
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*/
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void ReversePickersListOrder();
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/**
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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,
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* a picker is returned, with its members set to 0 or NULL.
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*/
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ITEM_PICKER GetItemWrapper( unsigned int aIdx ) const;
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/**
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* @return A pointer to the picked item.
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* @param aIdx Index of the picked item in the picked list.
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*/
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EDA_ITEM* GetPickedItem( unsigned int aIdx ) const;
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/**
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* @return A pointer to the picked item's screen.
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* @param aIdx Index of the picked item in the picked list.
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*/
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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.
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* @param aIdx Index of the picked item in the picked list.
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*/
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EDA_ITEM* GetPickedItemLink( unsigned int aIdx ) const;
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/**
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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.
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* @param aIdx Index of the picked item in the picked list.
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*/
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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.
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*
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* @param aIdx Index of the picker in the picked list.
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* @return The value stored in the picker, if the picker exists, or 0 if does not exist.
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*/
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EDA_ITEM_FLAGS GetPickerFlags( unsigned aIdx ) const;
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/**
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* @param aItem A pointer to the item to pick.
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* @param aIdx Index of the picker in the picked list.
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* @return True if the picker exists or false if does not exist.
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*/
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bool SetPickedItem( EDA_ITEM* aItem, unsigned aIdx );
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/**
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* @param aItem A pointer to the item to pick.
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* @param aStatus The type of undo/redo operation associated to the item to pick.
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* @param aIdx Index of the picker in the picked list.
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* @return True if the picker exists or false if does not exist.
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*/
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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.
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*
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* @param aLink is the link to the item associated to the picked item.
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* @param aIdx is index of the picker in the picked list.
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* @return true if the picker exists, or false if does not exist.
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*/
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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.
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*
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* @param aStatus The type of undo/redo operation associated to the picked item
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* @param aIdx Index of the picker in the picked list
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* @return True if the picker exists or false if does not exist
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*/
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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).
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*
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* @param aFlags The flag value to save in picker.
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* @param aIdx Index of the picker in the picked list.
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* @return True if the picker exists or false if does not exist.
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*/
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bool SetPickerFlags( EDA_ITEM_FLAGS aFlags, unsigned aIdx );
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/**
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* Remove one entry (one picker) from the list of picked items.
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*
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* @param aIdx Index of the picker in the picked list.
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* @return True if ok or false if did not exist.
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*/
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bool RemovePicker( unsigned aIdx );
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/**
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* Copy all data from aSource to the list.
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*
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* Items picked are not copied. just pointer in them are copied.
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*
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* @param aSource The list of items to copy to the list.
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*/
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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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*/
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class UNDO_REDO_CONTAINER
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{
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public:
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UNDO_REDO_CONTAINER();
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~UNDO_REDO_CONTAINER();
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void PushCommand( PICKED_ITEMS_LIST* aCommand );
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PICKED_ITEMS_LIST* PopCommand();
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void ClearCommandList();
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std::vector <PICKED_ITEMS_LIST*> m_CommandsList; // the list of possible undo/redo commands
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};
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#endif // _CLASS_UNDOREDO_CONTAINER_H
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