Roslyn CTP: Three Introductory Projects

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Roslyn.Services.Editor;
using Roslyn.Services;
using Roslyn.Compilers.CSharp;
using Roslyn.Compilers;
using RoslynCTPLibrary.Attributes;
using RoslynCTPLibrary.Extensions;
using Roslyn.Compilers.Common;
using System.Threading;

namespace EventImplementer {
    [ExportSyntaxNodeOutliner(typeof(PropertyDeclarationSyntax))]
    class Outliner : ISyntaxOutliner {
        public IEnumerable<OutliningSpan> GetOutliningSpans(IDocument document, CommonSyntaxNode node, CancellationToken cancellationToken) {
            var property = (PropertyDeclarationSyntax)node;

            if (!property.Attributes.Any(ad => ad.Attributes.Any(a => a.Name.PlainName == typeof(FiresEventOnChange).Name || a.Name.PlainName == typeof(FiresEventOnQuery).Name))) yield break;

            var field = property.GetOwnerType().Members.OfType<FieldDeclarationSyntax>().FirstOrDefault(f => Constants.FieldPrefix + property.Identifier.ValueText == f.Declaration.Variables.First().Identifier.ValueText);
            if (field == null) yield break;

            var whiteSpace = "";
            foreach (var ws in property.GetLeadingTrivia().Where(t => t.Kind == SyntaxKind.WhitespaceTrivia))
                for (int i = 0; i < ws.Width; i++)
                    whiteSpace += " ";

            yield return new OutliningSpan(TextSpan.FromBounds(property.Identifier.Span.End + 2, field.Span.End), whiteSpace + "{ get; set; }", true);
        }

        #region Unimplemented ISyntaxOutliner members

        public IEnumerable<OutliningSpan> GetOutliningSpans(IDocument document, CommonSyntaxTrivia trivia, CancellationToken cancellationToken) {
            throw new NotImplementedException();
        }

        #endregion
    }
}