public CatchOperationsFromHistoryForDelegatedPrimitive(MockTextUndoHistory history, MockTextUndoPrimitive primitive, DelegatedUndoPrimitiveState state)
{
_history = history;
_primitive = primitive;
primitive.State = state;
history.ForwardToUndoOperation(primitive);
}
public MockTextUndoTransaction(ITextUndoHistory history, ITextUndoTransaction parent, string description)
{
_history = history as MockTextUndoHistory;
_parent = parent as MockTextUndoTransaction;
Description = description;
_state = UndoTransactionState.Open;
_primitives = new List <ITextUndoPrimitive>();
MergePolicy = NullMergeUndoTransactionPolicy.Instance;
IsReadOnly = true;
}
/// <summary>
///
/// </summary>
/// <param name="context"></param>
/// <param name="keepAlive"></param>
/// <returns></returns>
public ITextUndoHistory RegisterHistory(object context, bool keepAlive)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (_strongContextMapping.TryGetValue(context, out var result))
{
if (!keepAlive)
{
_strongContextMapping.Remove(context);
_weakContextMapping.Add(new KeyWeakReference(context), result);
}
return(result);
}
KeyWeakReference reference = new KeyWeakReference(context);
if (_weakContextMapping.TryGetValue(reference, out result))
{
if (keepAlive)
{
_weakContextMapping.Remove(reference);
_strongContextMapping.Add(context, result);
}
return(result);
}
result = new MockTextUndoHistory(this);
_histories.Add(result, 1);
if (keepAlive)
{
_strongContextMapping.Add(context, result);
}
else
{
_weakContextMapping.Add(reference, result);
}
return(result);
}