/// <summary>
/// Redo the last undone entity change
/// </summary>
/// <remarks>
/// Unlike the undo operation, we don't need to copy the undo list out
/// because we want the item we're redoing being added back to the redo
/// list.
/// </remarks>
public void Redo()
{
_IsInUndoRedoOperation = true;
if (RedoList.Count > 0)
{
// Extract the item from the redo list.
int redoActionId = RedoList.Last().ActionId;
UndoRedoEntityInfo <TEntity> item;
for (int i = RedoList.Count - 1; i >= 0; i--)
{
item = RedoList.Last();
if (item.ActionId == redoActionId)
{
// Now, remove it from the list.
RedoList.RemoveAt(RedoList.Count - 1);
// Here we need to copy the redo list out because
// we will clear the list when the Add is called and
// the Redo is cleared there.
List <UndoRedoEntityInfo <TEntity> > redoList = RedoList.ToList();
//Redo actionId should be the same as undo action id
SetActionId(item.ActionId);
// Redo the last operation.
FuncRedo(item);
// Add the last redo item into undo list
AddUndo(item.ChangedEntity, item.PropertyName, item.OldValue, item.NewValue, item.MessageType);
// Now reset the redo list.
UpdateRedoList(redoList);
}
}
}
_IsInUndoRedoOperation = false;
}
/// <summary>
/// Removes the first operation in <see cref="RedoList"/>, perform it again and adds it to <see cref="UndoList"/>.
/// </summary>
public virtual void Redo()
{
Debug.Assert(RedoList.Count > 0);
IReversibleOperation Operation = RedoList[0];
RedoList.RemoveAt(0);
UndoList.Insert(0, Operation);
Operation.Redo();
LastOperation = Operation;
}