private static ResourceDictionary ExtractResources(DrawingGroup dg, ResourceDictionary resources = null)
{
if (resources == null)
{
resources = new ResourceDictionary();
}
foreach (Drawing drawing in dg.Children)
{
drawing.SetValue(SvgObject.IdProperty, DependencyProperty.UnsetValue);
drawing.SetValue(SvgLink.KeyProperty, DependencyProperty.UnsetValue);
GeometryDrawing geometryDrawing = drawing as GeometryDrawing;
if (geometryDrawing != null)
{
string className = SvgObject.GetClass(drawing);
if (!string.IsNullOrEmpty(className))
{
string resourceName = ClassNameToResourceName(className);
if (!resources.Contains(resourceName))
{
resources.Add(resourceName, geometryDrawing.Brush);
}
}
}
DrawingGroup childGroup = drawing as DrawingGroup;
if (childGroup != null)
{
ExtractResources(childGroup, resources);
}
}
return(resources);
}