private protected virtual void ExecuteReplaceWithCycle(IWriteableOperation operation)
{
IFocusReplaceWithCycleOperation ReplaceWithCycleOperation = (IFocusReplaceWithCycleOperation)operation;
Node ParentNode = ReplaceWithCycleOperation.ParentNode;
string PropertyName = ReplaceWithCycleOperation.PropertyName;
IFocusInner <IFocusBrowsingChildIndex> Inner = GetInner(ParentNode, PropertyName) as IFocusInner <IFocusBrowsingChildIndex>;
ReplaceState(ReplaceWithCycleOperation, Inner);
IFocusCyclableNodeState NewState = StateTable[ReplaceWithCycleOperation.NewBrowsingIndex] as IFocusCyclableNodeState;
Debug.Assert(NewState != null);
NewState.RestoreCycleIndexList(ReplaceWithCycleOperation.CycleIndexList);
NotifyStateReplaced(ReplaceWithCycleOperation);
}
/// <summary>
/// Replace an existing node with a new one, keeping its cycle.
/// </summary>
/// <param name="inner">The inner where the node is replaced.</param>
/// <param name="cycleIndexList">Cycle of nodes that can replace the current node.</param>
/// <param name="cyclePosition">New position in the cycle.</param>
/// <param name="nodeIndex">Index of the replacing node upon return.</param>
public virtual void Replace(IFocusInner inner, FocusInsertionChildNodeIndexList cycleIndexList, int cyclePosition, out IFocusBrowsingChildIndex nodeIndex)
{
Contract.RequireNotNull(cycleIndexList, out FocusInsertionChildNodeIndexList CycleIndexList);
Debug.Assert(CycleIndexList.Count >= 2);
Debug.Assert(cyclePosition >= 0 && cyclePosition < CycleIndexList.Count);
IFocusInsertionChildNodeIndex ReplacementIndex = CycleIndexList[cyclePosition];
IndexToPositionAndNode(ReplacementIndex, out int BlockIndex, out int Index, out _, out Node Node);
System.Action <IWriteableOperation> HandlerRedo = (IWriteableOperation operation) => ExecuteReplaceWithCycle(operation);
System.Action <IWriteableOperation> HandlerUndo = (IWriteableOperation operation) => UndoReplaceWithCycle(operation);
IFocusReplaceWithCycleOperation Operation = CreateReplaceWithCycleOperation(inner.Owner.Node, inner.PropertyName, BlockIndex, Index, CycleIndexList, cyclePosition, HandlerRedo, HandlerUndo, isNested: false);
ExecuteReplaceWithCycle(Operation);
nodeIndex = Operation.NewBrowsingIndex;
SetLastOperation(Operation);
CheckInvariant();
}
