/// <summary>
/// Removes a node from a list or block list.
/// </summary>
/// <param name="operation">Details of the operation performed.</param>
public virtual void Remove(WriteableRemoveNodeOperation operation)
{
int RemoveIndex = operation.Index;
Debug.Assert(RemoveIndex >= 0 && RemoveIndex < StateList.Count);
IWriteablePlaceholderNodeState OldChildState = (IWriteablePlaceholderNodeState)StateList[RemoveIndex];
RemoveFromStateList(RemoveIndex);
Node ParentNode = Owner.Node;
NodeTreeHelperList.RemoveFromList(ParentNode, PropertyName, RemoveIndex);
while (RemoveIndex < StateList.Count)
{
IWriteablePlaceholderNodeState State = (IWriteablePlaceholderNodeState)StateList[RemoveIndex];
IWriteableBrowsingListNodeIndex NodeIndex = State.ParentIndex as IWriteableBrowsingListNodeIndex;
Debug.Assert(NodeIndex != null);
Debug.Assert(NodeIndex.Index == RemoveIndex + 1);
NodeIndex.MoveDown();
RemoveIndex++;
}
operation.Update(OldChildState);
}
/// <summary>
/// Moves a node around in a list or block list. In a block list, the node stays in same block.
/// </summary>
/// <param name="operation">Details of the operation performed.</param>
public virtual void Move(IWriteableMoveNodeOperation operation)
{
Debug.Assert(operation != null);
int MoveIndex = operation.Index;
int Direction = operation.Direction;
Debug.Assert(MoveIndex >= 0 && MoveIndex < StateList.Count);
Debug.Assert(MoveIndex + operation.Direction >= 0 && MoveIndex + operation.Direction < StateList.Count);
IWriteableBrowsingListNodeIndex MovedNodeIndex = StateList[MoveIndex].ParentIndex as IWriteableBrowsingListNodeIndex;
Debug.Assert(MovedNodeIndex != null);
INode ParentNode = Owner.Node;
MoveInStateList(MoveIndex, Direction);
NodeTreeHelperList.MoveNode(ParentNode, PropertyName, MoveIndex, Direction);
operation.Update(StateList[MoveIndex + Direction]);
if (Direction > 0)
{
for (int i = MoveIndex; i < MoveIndex + Direction; i++)
{
IWriteableBrowsingListNodeIndex ChildNodeIndex = StateList[i].ParentIndex as IWriteableBrowsingListNodeIndex;
Debug.Assert(ChildNodeIndex != null);
ChildNodeIndex.MoveDown();
MovedNodeIndex.MoveUp();
}
}
else if (Direction < 0)
{
for (int i = MoveIndex; i > MoveIndex + Direction; i--)
{
IWriteableBrowsingListNodeIndex ChildNodeIndex = StateList[i].ParentIndex as IWriteableBrowsingListNodeIndex;
Debug.Assert(ChildNodeIndex != null);
ChildNodeIndex.MoveUp();
MovedNodeIndex.MoveDown();
}
}
}