97 lines
2.2 KiB
C++
97 lines
2.2 KiB
C++
/*
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Copyright (C) 2002 Brett Viren & Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#ifndef __lib_pbd_undo_h__
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#define __lib_pbd_undo_h__
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#include <string>
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#include <list>
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#include <sigc++/slot.h>
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#include <sys/time.h>
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using std::string;
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using std::list;
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typedef sigc::slot<void> UndoAction;
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class UndoCommand
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{
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public:
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UndoCommand ();
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UndoCommand (const UndoCommand&);
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UndoCommand& operator= (const UndoCommand&);
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void clear ();
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void add_undo (const UndoAction&);
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void add_redo (const UndoAction&);
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void add_redo_no_execute (const UndoAction&);
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void undo();
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void redo();
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void set_name (const string& str) {
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_name = str;
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}
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const string& name() const { return _name; }
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void set_timestamp (struct timeval &t) {
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_timestamp = t;
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}
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const struct timeval& timestamp() const {
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return _timestamp;
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}
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private:
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list<UndoAction> redo_actions;
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list<UndoAction> undo_actions;
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struct timeval _timestamp;
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string _name;
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};
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class UndoHistory
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{
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public:
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UndoHistory() {}
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~UndoHistory() {}
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void add (UndoCommand uc);
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void undo (unsigned int n);
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void redo (unsigned int n);
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unsigned long undo_depth() const { return UndoList.size(); }
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unsigned long redo_depth() const { return RedoList.size(); }
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string next_undo() const { return (UndoList.empty() ? string("") : UndoList.back().name()); }
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string next_redo() const { return (RedoList.empty() ? string("") : RedoList.back().name()); }
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void clear ();
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void clear_undo ();
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void clear_redo ();
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private:
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list<UndoCommand> UndoList;
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list<UndoCommand> RedoList;
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};
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#endif /* __lib_pbd_undo_h__ */
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