private int CalculateInsertionIndexBasedOnParent(int targetLayer, LayoutVertexBase parentVertex,
IReadOnlyLayoutVertexLayers layers)
{
var parentLayer = layers.GetLayer(parentVertex);
var parentIndexInLayer = layers.GetIndexInLayer(parentVertex);
var followingParent = GetFollowingParent(parentLayer, parentIndexInLayer, layers);
if (followingParent == null)
{
return(layers.GetLayer(targetLayer).Count);
}
var firstChildOfFollowingParent = _properLayoutGraph.GetPrimaryChildren(followingParent)
.Where(layers.HasLocation).OrderBy(layers.GetIndexInLayer).First();
return(layers.GetIndexInLayer(firstChildOfFollowingParent));
}
private int DetermineIndexInLayer(LayoutVertexBase vertex, int layerIndex, IReadOnlyLayoutVertexLayers layers)
{
var layer = layers.GetLayer(layerIndex);
var parentVertex = _properLayoutGraph.GetPrimaryParent(vertex);
if (parentVertex == null)
{
return(layer.Count);
}
var siblingsInLayer = GetPrimarySiblingsInLayer(vertex, layerIndex, layers)
.OrderBy(layer.IndexOf).ToArray();
if (siblingsInLayer.Any())
{
return(CalculateInsertionIndexBasedOnSiblings(vertex, siblingsInLayer, layers));
}
return(CalculateInsertionIndexBasedOnParent(layerIndex, parentVertex, layers));
}
