* Copyright 2006, Haiku.
* Distributed under the terms of the MIT License.
*
* Authors:
* Stephan Aßmus <superstippi@gmx.de>
*/
#ifndef COMMAND_STACK_H
#define COMMAND_STACK_H
#include <stack>
#include <Locker.h>
#include "Observable.h"
class BString;
class Command;
class CommandStack : public BLocker,
public Observable {
public:
CommandStack();
virtual ~CommandStack();
status_t Perform(Command* command);
status_t Undo();
status_t Redo();
bool GetUndoName(BString& name);
bool GetRedoName(BString& name);
void Clear();
void Save();
bool IsSaved();
private:
status_t _AddCommand(Command* command);
typedef std::stack<Command*> command_stack;
command_stack fUndoHistory;
command_stack fRedoHistory;
Command* fSavedCommand;
};
#endif
