private int CalculateInsertionIndexBasedOnSiblings(LayoutVertexBase vertex,
LayoutVertexBase[] siblingsInLayer, IReadOnlyLayoutVertexLayers layers)
{
var followingSiblingInLayer = siblingsInLayer.FirstOrDefault(i => Precedes(vertex, i));
return(followingSiblingInLayer != null
? layers.GetIndexInLayer(followingSiblingInLayer)
: layers.GetIndexInLayer(siblingsInLayer.Last()) + 1);
}
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 LayoutVertexBase GetFollowingParent(IReadOnlyLayoutVertexLayer layer, int index,
IReadOnlyLayoutVertexLayers layers)
{
return(layer.FirstOrDefault(i => layers.GetIndexInLayer(i) > index &&
_properLayoutGraph.GetPrimaryChildren(i).Any(layers.HasLocation)));
}
