public void StringEscaping()
{
RootGraph root = RootGraph.CreateNew("Graph with escaped strings", GraphType.Directed);
Node.IntroduceAttribute(root, "label", "\\N");
Node nodeA = root.GetOrAddNode("A");
// Several characters and character sequences can have special meanings in labels, like \N.
// When you want to have a literal string in a label, we provide a convenience function for you to do just that.
nodeA.SetAttribute("label", CGraphThing.EscapeLabel("Some string literal \\N \\n |}>"));
root.ComputeLayout();
// When defining portnames, some characters, like ':' and '|', are not allowed and they can't be escaped either.
// This can be troubling if you have an externally defined ID for such a port.
// We provide a function that maps strings to valid portnames.
var somePortId = "port id with :| special characters";
var validPortName = Edge.ConvertUidToPortName(somePortId);
Node nodeB = root.GetOrAddNode("B");
nodeB.SafeSetAttribute("shape", "record", "");
nodeB.SafeSetAttribute("label", $"<{validPortName}>1|2", "\\N");
// The function makes sure different strings don't accidentally map onto the same portname
Assert.That(Edge.ConvertUidToPortName(":"), Is.Not.EqualTo(Edge.ConvertUidToPortName("|")));
}
public void TestLabelEscaping(bool escape)
{
string label1 = "|";
string label2 = @"\N\n\L";
string label3 = "3";
if (escape)
{
label1 = CGraphThing.EscapeLabel(label1);
label2 = CGraphThing.EscapeLabel(label2);
}
{
RootGraph root = CreateUniqueTestGraph();
Node node1 = root.GetOrAddNode("1");
node1.SafeSetAttribute("shape", "record", "");
node1.SafeSetAttribute("label", label1, "");
Node node2 = root.GetOrAddNode("2");
node2.SafeSetAttribute("label", label2, "");
Node node3 = root.GetOrAddNode("3");
node3.SafeSetAttribute("label", label3, "");
root.ToDotFile(GetTestFilePath("out.gv"));
}
{
var root = RootGraph.FromDotFile(GetTestFilePath("out.gv"));
Node node1 = root.GetNode("1");
Assert.That(node1.GetAttribute("label"), Is.EqualTo(label1));
Node node2 = root.GetNode("2");
Assert.That(node2.GetAttribute("label"), Is.EqualTo(label2));
Node node3 = root.GetNode("3");
Assert.That(node3.GetAttribute("label"), Is.EqualTo(label3));
root.ComputeLayout();
root.ToSvgFile(GetTestFilePath("out.svg"));
root.ToDotFile(GetTestFilePath("out.dot"));
var rects = node1.GetRecordRectangles();
if (escape)
{
Assert.That(rects.Count, Is.EqualTo(1));
Assert.That(node2.BoundingBox().Height, Is.EqualTo(node3.BoundingBox().Height));
}
else
{
Assert.That(rects.Count, Is.EqualTo(2));
Assert.That(node2.BoundingBox().Height, Is.Not.EqualTo(node3.BoundingBox().Height));
}
}
}
