/// <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;
if (ClipboardHelper.TryReadNode(out Node Node))
{
IFocusNodeState State = StateView.State;
if ((State.ParentInner != null && State.ParentInner.InterfaceType.IsAssignableFrom(Type.FromGetType(Node))) || (State.ParentInner == null && Type.FromGetType(Node) == Type.FromGetType(State.Node)))
{
if (State.ParentIndex is IFocusBrowsingInsertableIndex AsInsertableIndex)
{
FocusController Controller = StateView.ControllerView.Controller;
Node ParentNode = State.ParentInner.Owner.Node;
IFocusInsertionChildIndex ReplaceIndex = (IFocusInsertionChildIndex)AsInsertableIndex.ToInsertionIndex(ParentNode, Node);
Controller.Replace(State.ParentInner, ReplaceIndex, out IWriteableBrowsingChildIndex NewIndex);
isChanged = true;
}
}
}
}
/// <summary></summary>
protected virtual void PasteNode(INode node, out bool isChanged)
{
isChanged = false;
IFocusControllerView ControllerView = StateView.ControllerView;
if (ControllerView.Focus is IFocusTextFocus AsTextFocus)
{
IFocusNodeState State = AsTextFocus.CellView.StateView.State;
if (State.Node.GetType().IsAssignableFrom(node.GetType()))
{
if (State.ParentIndex is IFocusBrowsingInsertableIndex AsInsertableIndex)
{
IFocusController Controller = StateView.ControllerView.Controller;
INode ParentNode = State.ParentInner.Owner.Node;
IFocusInsertionChildIndex ReplaceIndex = (IFocusInsertionChildIndex)AsInsertableIndex.ToInsertionIndex(ParentNode, node);
Controller.Replace(State.ParentInner, ReplaceIndex, out IWriteableBrowsingChildIndex NewIndex);
isChanged = true;
}
}
}
}
/// <summary>
/// Checks if a node can be simplified.
/// </summary>
/// <param name="inner">Inner to use to replace the node upon return.</param>
/// <param name="index">Index of the simpler node upon return.</param>
/// <returns>True if a node can be simplified at the focus.</returns>
public virtual bool IsItemSimplifiable(out IFocusInner inner, out IFocusInsertionChildIndex index)
{
inner = null;
index = null;
bool IsSimplifiable = false;
IFocusNodeState CurrentState = Focus.CellView.StateView.State;
// Search recursively for a simplifiable node.
while (CurrentState != null)
{
if (NodeHelper.GetSimplifiedNode(CurrentState.Node, out Node SimplifiedNode))
{
if (SimplifiedNode != null)
{
Type InterfaceType = CurrentState.ParentInner.InterfaceType;
if (InterfaceType.IsAssignableFrom(Type.FromGetType(SimplifiedNode)))
{
IFocusBrowsingChildIndex ParentIndex = CurrentState.ParentIndex as IFocusBrowsingChildIndex;
Debug.Assert(ParentIndex != null);
inner = CurrentState.ParentInner;
index = ((IFocusBrowsingInsertableIndex)ParentIndex).ToInsertionIndex(inner.Owner.Node, SimplifiedNode) as IFocusInsertionChildIndex;
IsSimplifiable = true;
}
}
break;
}
CurrentState = CurrentState.ParentState;
}
return(IsSimplifiable);
}