public static string MakeGraphvizDot(TextDocument document, int offset, string rankdir)
{
GraphvizDotGenerator generator = new GraphvizDotGenerator(rankdir);
var table = GraphvizTableGenerator.MakeTable(document, offset);
return(generator.MakeGraphvizDot(table));
}
/// Constructs an element at the specified offset.
/// May return null if no element should be constructed.
protected override InlineObjectElement ConstructMainElement(int offset)
{
Match m = FindMatch(offset);
// check whether there's a match exactly at offset
if (m.Success && m.Index == 0)
{
GraphGeneration wrapper = GetGraphGeneration();
UIElement uiElement;
if (wrapper.IsGraphvizInstalled)
{
string rankdir = m.Groups[2].Value.Trim();
string dotGraph = GraphvizDotGenerator.MakeGraphvizDot(Document, offset, rankdir);
BitmapImage bitmap = LoadBitmap(dotGraph);
if (bitmap != null)
{
string scale = m.Groups[1].Value;
uiElement = CreateImageControl(offset, scale, bitmap);
}
else
{
uiElement = CreateErrorMesageTextBlock("Invalid Graphviz");
}
}
else
{
uiElement = CreateErrorMesageTextBlock("Graphviz is not installed");
}
// Pass the length of the match to the 'documentLength' parameter of InlineObjectElement.
return(new InlineObjectElement(m.Length, uiElement));
}
return(null);
}