protected override void DoTraverse(Signal rootSignal, IScanVisitor visitor, bool ignoreHold)
{
if(rootSignal.BehavesAsBeingDriven(ignoreHold))
{
List<Guid> ports = new List<Guid>();
TraversePort(ports, rootSignal.DrivenByPort, rootSignal, ignoreHold, visitor);
}
}
private bool TraverseSignal(List<Guid> signals, Signal signal, Port target, bool ignoreHold, IScanVisitor visitor)
{
if(signal == null || signals.Contains(signal.InstanceId))
return true;
signals.Add(signal.InstanceId);
if(visitor.EnterSignal(signal, target, false, target == null))
{
if(signal.BehavesAsBeingDriven(ignoreHold))
{
Port port = signal.DrivenByPort;
foreach(Signal input in port.InputSignals)
if(!TraverseSignal(signals, input, port, ignoreHold, visitor))
return false; // finished
}
}
return visitor.LeaveSignal(signal, target, false, target == null);
}
private bool TraverseSignal(List<Guid> signals, List<Guid> ports, List<Guid> buses, Signal signal, Port target, bool ignoreHold, IScanVisitor visitor)
{
if(signal == null || signals.Contains(signal.InstanceId))
return true;
signals.Add(signal.InstanceId);
if(visitor.EnterSignal(signal, target, false, target == null))
{
// LEAF SIGNAL?
if(!signal.BehavesAsBeingDriven(ignoreHold))
{
if(!visitor.VisitLeaf(signal, false))
return false; // finished
}
else // HANDLE PORT
{
TraversePort(signals, ports, buses, signal.DrivenByPort, signal, ignoreHold, visitor);
}
}
return visitor.LeaveSignal(signal, target, false, target == null);
}
