private String GetObjectDotDeclaration(DotNode <T> node, DotNotationSettings settings)
{
var shape = node.Shape == null ? DotShapes.Box : node.Shape;
var text = String.IsNullOrEmpty(node.Text) ? node.GetType().Name : node.Text;
String strSettings = $"fontsize={settings.FontSize.ToString()} margin={settings.Margin}";
return($"\"{node.Id}\" [shape=\"{shape.ToString()}\" label=\"{text}\" tooltip=\"{text}\" {strSettings}]");
}
private String GetLinkDotDeclaration(DotNode <T> node, DotNotationSettings settings)
{
String strSettings = $"fontsize={settings.FontSize.ToString()} margin={settings.Margin}";
var sb = new StringBuilder();
foreach (var nodeRef in node.ParentNodes)
{
sb.AppendLine($"\"{nodeRef.DotNode.Id.ToString()}\" -> \"{node.Id.ToString()}\" [label=\"{nodeRef.Name}\" {strSettings}]");
}
return(sb.ToString());
}
public string Convert(Flow <T> flow)
{
DotNotationSettings _settings = this.Settings == null ? DotNotationSettings.Default : this.Settings;
var notations = ReadFlow(flow.Actions).Nodes;
var result = ToDotNotation(notations, Settings);
return($"digraph G {{\n" +
$"compound=true;\n" + // allow links between edges
$"{result.Nodes}\n" + // declare all the nodes and subgraphs
$"{result.Links}\n" + // links must always be declared all together at the end; including links within subgraphs
$"}}");
}
private (string Nodes, string Links) ToDotNotation(List <DotNode <T> > nodes, DotNotationSettings settings = null)
{
if (settings == null)
{
settings = DotNotationSettings.Default;
}
String strSettings = $"fontsize={settings.FontSize.ToString()} margin={settings.Margin}";
StringBuilder dotSb = new StringBuilder();
StringBuilder linkSb = new StringBuilder();
foreach (var node in nodes)
{
if (node.SubNodes.Count > 0)
{
// cluster id is based on the group node id, replacing the guid - by _
dotSb.AppendLine($"subgraph cluster_{node.Id.ToString().Replace('-', '_')} {{");
dotSb.AppendLine($" label = \"{node.Text}\"");
var subNotation = ToDotNotation(node.SubNodes, settings);
dotSb.AppendLine(subNotation.Nodes);
linkSb.AppendLine(subNotation.Links);
dotSb.AppendLine("}");
}
else
{
dotSb.AppendLine(GetObjectDotDeclaration(node, settings));
linkSb.AppendLine(GetLinkDotDeclaration(node, settings));
}
}
dotSb.AppendLine(); // just a separation line before declaring the links
return(dotSb.ToString(), linkSb.ToString());
}
public DotNotationProvider(DotNotationSettings settings = null)
{
this.Settings = settings;
}