public IMemento Restore() {
// Before
textContainer.Invalidate();
TextChangeMemento oldState = new TextChangeMemento(textContainer);
textContainer.ChangeText(oldText, false);
// After
textContainer.Invalidate();
return oldState;
}
public IMemento Restore()
{
// Before
textContainer.Invalidate();
TextChangeMemento oldState = new TextChangeMemento(textContainer);
textContainer.ChangeText(oldText, false);
// After
textContainer.Invalidate();
return(oldState);
}
public bool Merge(IMemento otherMemento)
{
TextChangeMemento other = otherMemento as TextChangeMemento;
if (other != null)
{
if (other.textContainer.Equals(textContainer))
{
// Match, do not store anything as the initial state is what we want.
return(true);
}
}
return(false);
}
