protected override DomObject Convert(DomDocument document, DomAttribute attribute)
{
var buffer = new CodeBuffer();
RewriteExpressionSyntax.MatchVariablesAndEmit(buffer, attribute.Value);
return(new HxlExpressionAttribute(attribute.Name, buffer.ToString()));
}
internal static void EmitRenderingThunk(TextWriter sw, string name, DomObject component)
{
StringBuilder rendering = new StringBuilder();
// TODO Undesirable that expressions get serialized in EmitInstantiation
// TODO This serialization logic implies that only strings can be used with expressions
foreach (PropertyInfo m in Utility.ReflectGetProperties(component.GetType()))
{
if (m.CanWrite && m.PropertyType == typeof(string))
{
// TODO Need to check more than CanWrite -- may need to check accessibility of the setter (rare)
string text = (string)m.GetValue(component) ?? string.Empty;
if (HxlAttributeConverter.IsExpr(text))
{
CodeBuffer cb = new CodeBuffer();
RewriteExpressionSyntax.MatchVariablesAndEmit(cb, text);
rendering.AppendFormat(" {2}.{0} = {1};", m.Name, cb, name);
rendering.AppendLine();
}
}
}
var additional = component.Annotations <ExpressionInitializers>();
foreach (ExpressionInitializers m in additional)
{
rendering.AppendFormat(" {2}.{0} = {1};", m.Member.Name, m.Expression, name);
rendering.AppendLine();
}
// TODO Use of __self__ is a hack (will it actually be used?)
if (rendering.Length > 0)
{
sw.WriteLine("{0}.Rendering = (__context, __self__) => {{", name);
sw.WriteLine(" dynamic __closure = __context;");
sw.Write(rendering);
sw.WriteLine("};");
}
}