public static void Parse(string path, DiagramCanvas diagram) {
var parser = new PlainParser(path);
if (parser.ReadLine("graph")) {
parser.NextToken();
var size = parser.NextSize();
diagram.ComputedSize = size;
diagram.Width = size.Width;
diagram.Height = size.Height;
parser._coordTransform = (x, y) => new Point(x, size.Height - y);
}
// parse the computed node positions
while (parser.ReadLine("node")) {
var node = diagram.Nodes[parser.NextInt()];
node.ComputedPosition = parser.NextPoint();
}
// parse the computed edge paths
while (parser.ReadLine("edge")) {
var source = diagram.Nodes[parser.NextInt()];
var target = diagram.Nodes[parser.NextInt()];
var points = new PointCollection();
for (var n = parser.NextInt(); n > 0; n--) {
points.Add(parser.NextPoint());
}
var tokens = parser.RemainingTokens();
var role = DiagramEdgeRole.None;
try { role = (DiagramEdgeRole)Int32.Parse(tokens[tokens.Length - 1].After(1), NumberStyles.HexNumber); } catch { }
if (role != DiagramEdgeRole.None) {
var edge = new DiagramEdge(source, target, role, null);
edge.ComputedPath = points;
diagram.Edges.Add(edge);
}
}
parser.Close();
}
// parses an edge clause
private string _parseEdge(Match match) {
var source = _parseNodeRef(match.Groups[1].Value);
var target = _parseNodeRef(match.Groups[2].Value);
var properties = match.Groups[3].Value;
var role = _parseRole(_parseProperty("color", properties));
var label = _parseProperty("label", properties);
if (role != DiagramEdgeRole.None) {
var edge = new DiagramEdge(source, target, role, label);
var P = _parseProperty("pos", properties).Split(" ");
for (var i = 0; i < P.Length; i++) {
var p = P[i];
if (p.StartsWith("s,")) {
edge.ComputedArrowTail = _parsePoint(p.After(1));
} else if (p.StartsWith("e,")) {
edge.ComputedArrowHead = _parsePoint(p.After(1));
} else {
edge.ComputedPath.Add(_parsePoint(p));
}
}
if (label.NotEmpty()) {
edge.LabelPos = _parsePoint(_parseProperty("lp", properties));
}
_diagram.Edges.Add(edge);
}
return String.Empty;
}