/// <summary>
/// Traverses a given path of groups, starting at the last (picked) item through a given destination group, for the pin
/// that corresponds to the given group pin in the last group in the path. The last (innermost) group of "hitPath" is the picked item.</summary>
/// <typeparam name="TEdgeRoute">Pin</typeparam>
/// <param name="hitPath">Path of groups to traverse</param>
/// <param name="destNode">Destination group (last group to search) which contains the pin searched for</param>
/// <param name="hitRoute">Pin in innermost group where search begins</param>
/// <returns>Group pin in destination group "destNode" corresponding to "hitRoute" group pin in innermost group in path</returns>
static public TEdgeRoute EdgeRouteTraverser <TEdgeRoute>(AdaptablePath <object> hitPath, object destNode, TEdgeRoute hitRoute)
where TEdgeRoute : class, ICircuitPin
{
if (!hitPath.Last.Is <Element>())
{
return(null);
}
int fromIndex = hitPath.Count - 1; //start from the hit sub-item
int toIndex = hitPath.IndexOf(destNode);
if (toIndex < 0 || toIndex > fromIndex)
{
return(null);
}
var circuitPin = hitRoute;
var currentElement = hitPath.Last;
for (int i = fromIndex - 1; i >= toIndex; --i)
{
ICircuitPin matchedPin = null;
var parent = hitPath[i];
if (parent.Is <Group>())
{
var group = parent.Cast <Group>();
foreach (var pin in group.AllInputGroupPins)
{
var grpPin = pin.Cast <GroupPin>();
if (grpPin.InternalElement.Equals(currentElement) &&
grpPin.InternalElement.InputPin(grpPin.InternalPinName) == circuitPin)
{
matchedPin = grpPin;
break;
}
}
if (matchedPin == null)
{
foreach (var pin in group.OutputGroupPins)
{
var grpPin = pin.Cast <GroupPin>();
if (grpPin.InternalElement.Equals(currentElement) &&
grpPin.InternalElement.OutputPin(grpPin.InternalPinName) == circuitPin)
{
matchedPin = grpPin;
break;
}
}
}
}
if (matchedPin == null)
{
return(null);
}
circuitPin = matchedPin.Cast <TEdgeRoute>();
currentElement = parent;
}
return(circuitPin);
}
