private GraphvizEdge AddEdgeIfNotExist(string from, string to, GraphvizEdge.EdgeDir dir)
{
GraphvizEdge edge = DotModel.FindEdge(from, to);
if (edge == null)
{
edge = new GraphvizEdge(from, to);
DotModel.Add(edge);
}
edge.Dir = dir;
return(edge);
}
private void ProcessEdge(GraphvizTableRow row)
{
string edges = row[0].Value;
GraphvizEdge.EdgeDir dir = ToDir(edges);
var nodes = edges.Split(new string[] { "<->", "->", "--" }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < nodes.Length - 1; i++)
{
string from = nodes[i].Trim();
string to = nodes[i + 1].Trim();
if (!string.IsNullOrEmpty(from) && !string.IsNullOrEmpty(to))
{
GraphvizEdge edge = AddEdgeIfNotExist(from, to, dir);
ProcessEdgeAttributes(row, edge);
}
}
}
private void ProcessEdgeAttributes(GraphvizTableRow row, GraphvizEdge edge)
{
if (LabelIndex >= 0)
{
string label = row[LabelIndex]?.Value;
edge.Label = label?.Trim();
}
if (ColorIndex >= 0)
{
string color = row[ColorIndex]?.Value;
edge.Color = color?.Trim();
}
if (ShapeIndex >= 0)
{
string shape = row[ShapeIndex]?.Value;
edge.ArrowHead = shape?.Trim();
}
}
public void Add(GraphvizEdge edge) => Edges.Add(edge);
