/// <summary>
/// Fires when Memento is changed.
/// </summary>
/// <param name="e">Event args containing Memento instance.</param>
protected virtual void OnMementoChanged(MementoChangedEventArgs <T> e)
{
// Invoke event.
MementoChanged?.Invoke(this, e);
// Output log message with changed Memento.
Logging.LineSeparator("MEMENTO CHANGED");
Logging.Log(e.Memento.ToString());
}
/// <summary>
/// Set current state based on passed Memento.State property.
/// </summary>
/// <param name="memento">Memento from which to get State property.</param>
public void SetMemento(Memento <T> memento)
{
_state = memento.State;
//// Invoke event handler.
MementoChanged?.Invoke(this, new MementoChangedEventArgs <T>
{
Memento = memento,
});
}
/// <summary>
/// Creates a new Memento instance using _state.
/// </summary>
/// <returns>Newly generated Memento instance.</returns>
public Memento <T> CreateMemento()
{
// Create memento and set state to current state.
var memento = new Memento <T>(_state);
//// Invoke event handler.
MementoChanged?.Invoke(this, new MementoChangedEventArgs <T>
{
Memento = memento,
});
return(memento);
}
public void Save(TMemento memento)
{
if (currentSheet == null)
{
mementoList.AddFirst(memento);
currentSheet = mementoList.First;
MementoChanged?.Invoke(this, currentSheet.Value);
}
else if (!memento.Equals(currentSheet.Value))
{
currentSheet = currentSheet.ReplaceNext(memento);
MementoChanged?.Invoke(this, currentSheet.Value);
}
}
