IDocument now derives from IServiceProvider.

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Document/TextDocument.cs

@@ -5,10 +5,10 @@ using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.ComponentModel;
+using System.ComponentModel.Design;
 using System.Diagnostics;
 using System.Globalization;
 using System.Threading;
-
 using ICSharpCode.AvalonEdit.Utils;
 using ICSharpCode.Editor;
 
@@ -440,6 +440,21 @@ namespace ICSharpCode.AvalonEdit.Document
 		/// </summary>
 		/// <remarks><inheritdoc cref="Changing"/></remarks>
 		public event EventHandler UpdateFinished;
+		
+		void IDocument.StartUndoableAction()
+		{
+			BeginUpdate();
+		}
+		
+		void IDocument.EndUndoableAction()
+		{
+			EndUpdate();
+		}
+		
+		IDisposable IDocument.OpenUndoGroup()
+		{
+			return RunUpdate();
+		}
 		#endregion
 		
 		#region Fire events after update
@@ -897,19 +912,36 @@ namespace ICSharpCode.AvalonEdit.Document
 			throw new NotImplementedException();
 		}
 		
-		void IDocument.StartUndoableAction()
+		#region Service Provider
-		{
+		IServiceProvider serviceProvider;
-			throw new NotImplementedException();
-		}
 		
-		void IDocument.EndUndoableAction()
+		/// <summary>
-		{
+		/// Gets/Sets the service provider associated with this document.
-			throw new NotImplementedException();
+		/// By default, every TextDocument has its own ServiceContainer; and has the document itself
+		/// registered as <see cref="IDocument"/> and <see cref="TextDocument"/>.
+		/// </summary>
+		public IServiceProvider ServiceProvider {
+			get {
+				VerifyAccess();
+				if (serviceProvider == null) {
+					var container = new ServiceContainer();
+					container.AddService(typeof(IDocument), this);
+					container.AddService(typeof(TextDocument), this);
+				}
+				return serviceProvider;
+			}
+			set {
+				VerifyAccess();
+				if (value == null)
+					throw new ArgumentNullException();
+				serviceProvider = value;
+			}
 		}
 		
-		IDisposable IDocument.OpenUndoGroup()
+		object IServiceProvider.GetService(Type serviceType)
 		{
-			throw new NotImplementedException();
+			return this.ServiceProvider.GetService(serviceType);
 		}
+		#endregion
 	}
 }

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Rendering/TextView.cs

@@ -1638,9 +1638,18 @@ namespace ICSharpCode.AvalonEdit.Rendering
 			get { return services; }
 		}
 		
-		object IServiceProvider.GetService(Type serviceType)
+		/// <summary>
+		/// Retrieves a service from the text view.
+		/// If the service is not found in the <see cref="Services"/> container,
+		/// this method will also look for it in the current document's service provider.
+		/// </summary>
+		public object GetService(Type serviceType)
 		{
-			return services.GetService(serviceType);
+			object instance = services.GetService(serviceType);
+			if (instance == null && document != null) {
+				instance = document.ServiceProvider.GetService(serviceType);
+			}
+			return instance;
 		}
 		
 		void ConnectToTextView(object obj)

src/Libraries/NRefactory/ICSharpCode.Editor/IDocument.cs

@@ -10,7 +10,7 @@ namespace ICSharpCode.Editor
 	/// Line and column counting starts at 1.
 	/// Offset counting starts at 0.
 	/// </summary>
-	public interface IDocument : ITextSource
+	public interface IDocument : ITextSource, IServiceProvider
 	{
 		/// <summary>
 		/// Gets/Sets the text of the whole document..

src/Libraries/NRefactory/ICSharpCode.Editor/ReadOnlyDocument.cs

@@ -312,8 +312,7 @@ namespace ICSharpCode.Editor
 			return textSource.IndexOfAny(anyOf, startIndex, count);
 		}
 		
-		/// <inheritdoc/>
+		object IServiceProvider.GetService(Type serviceType)
-		public object GetService(Type serviceType)
 		{
 			return null;
 		}