bool TryGetIconRenderer(ElementIcon icon, out SvgRenderer renderer)
{
if (icon == null)
{
throw new ArgumentNullException("icon");
}
if (!rendererCache.TryGetValue(icon.Name, out renderer))
{
using (var iconStream = icon.GetStream())
{
if (iconStream == null)
{
return(false);
}
var svgDocument = new XmlDocument();
svgDocument.XmlResolver = null;
svgDocument.Load(iconStream);
var element = SvgFactory.LoadFromXML(svgDocument, null);
renderer = CreateRenderer(element);
rendererCache.Add(icon.Name, renderer);
}
}
return(true);
}
public SvgRenderer GetIconRenderer(ElementCategory category)
{
var categoryIcon = ElementIcon.FromElementCategory(category);
if (!TryGetIconRenderer(categoryIcon, out SvgRenderer renderer))
{
rendererCache.Add(categoryIcon.Name, renderer);
}
return(renderer);
}
public GraphNode(ExpressionBuilder value, int layer, IEnumerable <GraphEdge> successors)
{
Value = value;
Layer = layer;
Successors = successors;
if (value != null)
{
var expressionBuilder = ExpressionBuilder.Unwrap(value);
var elementAttributes = TypeDescriptor.GetAttributes(expressionBuilder);
var elementCategoryAttribute = (WorkflowElementCategoryAttribute)elementAttributes[typeof(WorkflowElementCategoryAttribute)];
var obsolete = (ObsoleteAttribute)elementAttributes[typeof(ObsoleteAttribute)] != null;
if (expressionBuilder is DisableBuilder)
{
Flags |= NodeFlags.Disabled;
}
var workflowElement = ExpressionBuilder.GetWorkflowElement(expressionBuilder);
if (workflowElement != expressionBuilder)
{
var builderCategoryAttribute = elementCategoryAttribute;
elementAttributes = TypeDescriptor.GetAttributes(workflowElement);
elementCategoryAttribute = (WorkflowElementCategoryAttribute)elementAttributes[typeof(WorkflowElementCategoryAttribute)];
obsolete |= (ObsoleteAttribute)elementAttributes[typeof(ObsoleteAttribute)] != null;
if (elementCategoryAttribute == WorkflowElementCategoryAttribute.Default)
{
elementCategoryAttribute = builderCategoryAttribute;
}
}
if (obsolete)
{
Flags |= NodeFlags.Obsolete;
}
Category = elementCategoryAttribute.Category;
BuildDependency = expressionBuilder.IsBuildDependency();
Icon = new ElementIcon(workflowElement);
if (workflowElement is IWorkflowExpressionBuilder)
{
if (Category == ElementCategory.Workflow)
{
Category = ElementCategory.Combinator;
Flags |= NodeFlags.NestedGroup;
}
else
{
Flags |= NodeFlags.NestedScope;
}
}
}
InitializeDummySuccessors();
}
