private RelativeLocation GetTargetLocation(LayoutVertexBase vertex, IReadOnlyLayoutVertexLayers layers)
{
if (layers.HasLocation(vertex))
{
throw new InvalidOperationException($"Vertex {vertex} already has a relative location.");
}
var toLayerIndex = _properLayoutGraph.GetLayerIndex(vertex);
var toIndexInLayer = DetermineIndexInLayer(vertex, toLayerIndex, layers);
return(new RelativeLocation(toLayerIndex, toIndexInLayer));
}
private IEnumerable <LayoutVertexBase> GetPrimarySiblingsInLayer(
LayoutVertexBase vertex, int layerIndex, IReadOnlyLayoutVertexLayers layers)
{
return(_properLayoutGraph.GetPrimarySiblings(vertex)
.Where(i => layers.HasLocation(i) && layers.GetLayerIndex(i) == layerIndex));
}
