/* * 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) 2011 Wayne Stambaugh * Copyright (C) 2009-2020 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 #include #include class EDA_ITEM; class PICKED_ITEMS_LIST; class BASE_SCREEN; /** * Undo Redo considerations: * Basically we have 3 cases * New item * Deleted item * Modified item * there is also a specific 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. */ /** * Type of undo/redo operations * * Each type must be redo/undone by a specific operation. */ 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 GROUP, UNGROUP }; 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. */ }; /** * 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 { private: std::vector m_ItemsList; public: PICKED_ITEMS_LIST(); ~PICKED_ITEMS_LIST(); /** * Push \a aItem to the top of the list. * * @param aItem Picker to push on to the list. */ void PushItem( const ITEM_PICKER& aItem ); /** * @return The picker removed from the top of the list. */ 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 * is returned. */ int FindItem( const EDA_ITEM* aItem ) const; /** * Delete only the list of pickers NOT the picked data itself. */ void ClearItemsList(); /** * 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(); /** * @return The count of pickers stored in this list. */ unsigned GetCount() const { return m_ItemsList.size(); } /** * 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 */ void ReversePickersListOrder(); /** * @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 ) const; /** * @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; /** * @return A pointer to the picked item's screen. * @param aIdx Index of the picked item in the picked list. */ BASE_SCREEN* GetScreenForItem( unsigned int aIdx ) const; /** * @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; /** * @return The type of undo/redo operation associated to the picked item, * or UNSPECIFIED if does not exist. * @param aIdx Index of the picked item in the picked list. */ UNDO_REDO GetPickedItemStatus( unsigned int aIdx ) const; /** * 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. */ EDA_ITEM_FLAGS GetPickerFlags( unsigned aIdx ) const; /** * @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 ); /** * @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. */ bool SetPickedItem( EDA_ITEM* aItem, UNDO_REDO aStatus, unsigned aIdx ); /** * 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 ); /** * 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( UNDO_REDO aStatus, unsigned aIdx ); /** * 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( EDA_ITEM_FLAGS aFlags, unsigned aIdx ); /** * 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 ); /** * 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 ); }; /** * A holder to handle a list of undo (or redo) commands. */ 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 m_CommandsList; // the list of possible undo/redo commands }; #endif // _CLASS_UNDOREDO_CONTAINER_H