A Framework for Command Recovery in User Interface

In this paper,a framework is presented for adding a general command recovery facility to user interface.A simple model of interactive system is discussed and four meta commands,UNDO,RE- DO,SKIPBACK,and SKIPFORWARD,are defined.The double-linked list is used to organize the re- covery information in a natural way for easy implementation.Applications of the framework to various demands of command recoveries show that the use of the framework is very easy and convenient.