public AlternatingLayer Clone()
{
var clonedLayer = new AlternatingLayer();
foreach (var item in this)
{
var cloneableItem = item as ICloneable;
if (cloneableItem != null)
{
clonedLayer.Add(cloneableItem.Clone() as IData);
}
else
{
clonedLayer.Add(item);
}
}
return(clonedLayer);
}
private static AlternatingLayer InitialOrderingOfNextLayer(
[NotNull, ItemNotNull] AlternatingLayer alternatingLayer,
[NotNull, ItemNotNull] IEnumerable <SugiVertex> nextLayer,
bool straightSweep)
{
Debug.Assert(alternatingLayer != null);
Debug.Assert(nextLayer != null);
// Get the list of the containers and vertices
var segmentContainerStack = new Stack <ISegmentContainer>(alternatingLayer.OfType <ISegmentContainer>().Reverse());
VertexTypes ignorableVertexType = straightSweep ? VertexTypes.QVertex : VertexTypes.PVertex;
var vertexStack = new Stack <SugiVertex>(
nextLayer
.Where(v => v.Type != ignorableVertexType)
.OrderBy(v => v.MeasuredPosition)
.Reverse());
var newAlternatingLayer = new AlternatingLayer();
while (vertexStack.Count > 0 && segmentContainerStack.Count > 0)
{
SugiVertex vertex = vertexStack.Peek();
ISegmentContainer segmentContainer = segmentContainerStack.Peek();
if (vertex.MeasuredPosition <= segmentContainer.Position)
{
newAlternatingLayer.Add(vertexStack.Pop());
}
else if (vertex.MeasuredPosition >= segmentContainer.Position + segmentContainer.Count - 1)
{
newAlternatingLayer.Add(segmentContainerStack.Pop());
}
else
{
vertexStack.Pop();
segmentContainerStack.Pop();
int k = (int)Math.Ceiling(vertex.MeasuredPosition - segmentContainer.Position);
segmentContainer.Split(k, out ISegmentContainer container1, out ISegmentContainer container2);
newAlternatingLayer.Add(container1);
newAlternatingLayer.Add(vertex);
container2.Position = segmentContainer.Position + k;
segmentContainerStack.Push(container2);
}
}
if (vertexStack.Count > 0)
{
newAlternatingLayer.AddRange(
vertexStack
#if !SUPPORTS_ENUMERABLE_COVARIANT
.OfType <IData>()
#endif
);
}
if (segmentContainerStack.Count > 0)
{
newAlternatingLayer.AddRange(
segmentContainerStack
#if !SUPPORTS_ENUMERABLE_COVARIANT
.OfType <IData>()
#endif
);
}
return(newAlternatingLayer);
}
