/// <summary>
/// Replaces the selection with the content of the clipboard.
/// </summary>
/// <param name="isChanged">True if something was replaced or added.</param>
public override void Paste(out bool isChanged)
{
isChanged = false;
IFocusNodeState State = StateView.State;
IFocusBlockListInner ParentInner = State.PropertyToInner(PropertyName) as IFocusBlockListInner;
Debug.Assert(ParentInner != null);
Debug.Assert(StartIndex <= EndIndex);
int OldBlockCount = ParentInner.BlockStateList.Count;
int SelectionCount = EndIndex - StartIndex;
if (ClipboardHelper.TryReadBlockList(out IList <IBlock> BlockList))
{
bool IsAssignable = true;
if (BlockList.Count > 0)
{
NodeTreeHelperBlockList.GetBlockType(BlockList[0], out Type ChildInterfaceType, out Type ChildItemType);
IsAssignable = ParentInner.InterfaceType.IsAssignableFrom(ChildInterfaceType);
}
if (IsAssignable)
{
List <IWriteableInsertionBlockNodeIndex> IndexList = new List <IWriteableInsertionBlockNodeIndex>();
IFocusController Controller = StateView.ControllerView.Controller;
int InsertionBlockIndex = StartIndex;
for (int i = 0; i < BlockList.Count; i++)
{
IBlock NewBlock = BlockList[i];
for (int j = 0; j < NewBlock.NodeList.Count; j++)
{
INode NewNode = NewBlock.NodeList[j] as INode;
IFocusInsertionBlockNodeIndex InsertedIndex;
if (j == 0)
{
InsertedIndex = CreateNewBlockNodeIndex(ParentInner.Owner.Node, PropertyName, NewNode, InsertionBlockIndex, NewBlock.ReplicationPattern, NewBlock.SourceIdentifier);
}
else
{
InsertedIndex = CreateExistingBlockNodeIndex(ParentInner.Owner.Node, PropertyName, NewNode, InsertionBlockIndex, j);
}
Debug.Assert(InsertedIndex != null);
IndexList.Add(InsertedIndex);
}
InsertionBlockIndex++;
}
Controller.ReplaceBlockRange(ParentInner, StartIndex, EndIndex, IndexList);
Debug.Assert(ParentInner.BlockStateList.Count == OldBlockCount + BlockList.Count - SelectionCount);
StateView.ControllerView.ClearSelection();
isChanged = BlockList.Count > 0 || SelectionCount > 0;
}
}
}