implement XamlSymbolSearch

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Project/CSharpProject.cs

@@ -186,9 +186,7 @@ public override ItemType GetDefaultItemType(string fileName)
 
 		public override ISymbolSearch PrepareSymbolSearch(IEntity entity)
 		{
-			// TODO implement CompositeSymbolSearch to allow multiple instances to be returned, e.g., XamlSymbolSearch, etc.
-			// return CompositeSymbolSearch.Create(new XamlSymbolSearch(...), base.PrepareSymbolSearch(...))
-			return new CSharpSymbolSearch(Project, entity);
+			return CompositeSymbolSearch.Create(new CSharpSymbolSearch(Project, entity), base.PrepareSymbolSearch(entity));
 		}
 	}
 }

src/AddIns/BackendBindings/XamlBinding/XamlBinding/XamlBehavior.cs

@@ -32,7 +32,7 @@ public override ItemType GetDefaultItemType(string fileName)
 
 		public override ISymbolSearch PrepareSymbolSearch(IEntity entity)
 		{
-			return new XamlSymbolSearch(entity);
+			return CompositeSymbolSearch.Create(new XamlSymbolSearch(Project, entity), base.PrepareSymbolSearch(entity));
 		}
 	}
 

src/AddIns/BackendBindings/XamlBinding/XamlBinding/XamlBinding.csproj

@@ -13,9 +13,8 @@
     <WarningLevel>4</WarningLevel>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
     <SourceAnalysisOverrideSettingsFile>C:\Users\Daniel\AppData\Roaming\ICSharpCode/SharpDevelop3.0\Settings.SourceAnalysis</SourceAnalysisOverrideSettingsFile>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
-    <TargetFrameworkProfile>
-    </TargetFrameworkProfile>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkProfile>Client</TargetFrameworkProfile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <DebugSymbols>true</DebugSymbols>

src/AddIns/BackendBindings/XamlBinding/XamlBinding/XamlSymbolSearch.cs

@@ -2,9 +2,20 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading;
 using System.Threading.Tasks;
+using ICSharpCode.AvalonEdit.Highlighting;
+using ICSharpCode.Core;
+using ICSharpCode.NRefactory.CSharp.Resolver;
+using ICSharpCode.NRefactory.Editor;
+using ICSharpCode.NRefactory.Semantics;
 using ICSharpCode.NRefactory.TypeSystem;
 using ICSharpCode.SharpDevelop.Editor.Search;
+using ICSharpCode.SharpDevelop.Parser;
+using ICSharpCode.SharpDevelop.Project;
 using ICSharpCode.SharpDevelop.Refactoring;
 
 namespace ICSharpCode.XamlBinding
@@ -14,19 +25,88 @@ namespace ICSharpCode.XamlBinding
 	/// </summary>
 	public class XamlSymbolSearch : ISymbolSearch
 	{
-		public XamlSymbolSearch(IEntity entity)
+		IProject project;
+		ICompilation compilation;
+		IEntity entity;
+		List<FileName> interestingFileNames;
+		int workAmount;
+		double workAmountInverse;
+
+		public XamlSymbolSearch(IProject project, IEntity entity)
 		{
+			this.entity = entity;
+			compilation = ParserService.GetCompilation(project);
+			interestingFileNames = new List<FileName>();
+			foreach (var item in project.ParentSolution.SolutionFolderContainers.Select(f => f.SolutionItems).SelectMany(si => si.Items).Where(i => ".xaml".Equals(Path.GetExtension(i.Location), StringComparison.OrdinalIgnoreCase)))
+				interestingFileNames.Add(new FileName(Path.Combine(project.ParentSolution.Directory, item.Location)));
+			foreach (var item in project.ParentSolution.Projects.SelectMany(p => p.Items).OfType<FileProjectItem>().Where(i => ".xaml".Equals(Path.GetExtension(i.FileName), StringComparison.OrdinalIgnoreCase)))
+				interestingFileNames.Add(new FileName(item.FileName));
+			workAmount = interestingFileNames.Count;
+			workAmountInverse = 1.0 / workAmount;
 		}
 
 		public double WorkAmount {
-			get {
-				throw new NotImplementedException();
-			}
+			get { return workAmount; }
 		}
 
 		public Task FindReferencesAsync(SymbolSearchArgs searchArguments, Action<SearchedFile> callback)
 		{
-			throw new NotImplementedException();
+			if (callback == null)
+				throw new ArgumentNullException("callback");
+			var cancellationToken = searchArguments.ProgressMonitor.CancellationToken;
+			return Task.Run(
+				() => {
+					object progressLock = new object();
+					Parallel.ForEach(
+						interestingFileNames,
+						new ParallelOptions {
+							MaxDegreeOfParallelism = Environment.ProcessorCount,
+							CancellationToken = cancellationToken
+						},
+						delegate (FileName fileName) {
+							FindReferencesInFile(searchArguments, entity, fileName, callback, cancellationToken);
+							lock (progressLock)
+								searchArguments.ProgressMonitor.Progress += workAmountInverse;
+						});
+				}, cancellationToken
+			);
+		}
+
+		void FindReferencesInFile(SymbolSearchArgs searchArguments, IEntity entity, FileName fileName, Action<SearchedFile> callback, CancellationToken cancellationToken)
+		{
+			ITextSource textSource = searchArguments.ParseableFileContentFinder.Create(fileName);
+			if (textSource == null)
+				return;
+			int offset = textSource.IndexOf(entity.Name, 0, textSource.TextLength, StringComparison.Ordinal);
+			if (offset < 0)
+				return;
+
+			var parseInfo = ParserService.Parse(fileName, textSource) as XamlFullParseInformation;
+			if (parseInfo == null)
+				return;
+			ReadOnlyDocument document = null;
+			DocumentHighlighter highlighter = null;
+			List<Reference> results = new List<Reference>();
+			XamlResolver resolver = new XamlResolver();
+			do {
+				if (document == null) {
+					document = new ReadOnlyDocument(textSource);
+					var highlighting = HighlightingManager.Instance.GetDefinitionByExtension(Path.GetExtension(fileName));
+					if (highlighting != null)
+						highlighter = new DocumentHighlighter(document, highlighting.MainRuleSet);
+					else
+						highlighter = null;
+				}
+				var result = resolver.Resolve(parseInfo, document.GetLocation(offset + entity.Name.Length / 2 + 1), compilation, cancellationToken);
+				int length = entity.Name.Length;
+				if ((result is TypeResolveResult && ((TypeResolveResult)result).Type.Equals(entity)) || (result is MemberResolveResult && ((MemberResolveResult)result).Member.Equals(entity))) {
+					var region = new DomRegion(fileName, document.GetLocation(offset), document.GetLocation(offset + length));
+					var builder = SearchResultsPad.CreateInlineBuilder(region.Begin, region.End, document, highlighter);
+					results.Add(new Reference(region, result, offset, length, builder));
+				}
+				offset = textSource.IndexOf(entity.Name, offset + length, textSource.TextLength - offset - length, StringComparison.OrdinalIgnoreCase);
+			} while (offset > 0);
+			callback(new SearchedFile(fileName, results));
 		}
 	}
 }

src/AddIns/Misc/SearchAndReplace/Project/Gui/ObserverSearchResult.cs

@@ -68,13 +68,15 @@ void IObserver<SearchedFile>.OnNext(SearchedFile value)
 
 		void IObserver<SearchedFile>.OnError(Exception error)
 		{
+			if (error == null)
+				throw new ArgumentNullException("error");
 			// flatten AggregateException and
 			// filter OperationCanceledException
 			try {
 				if (error is AggregateException)
 					((AggregateException)error).Flatten().Handle(ex => ex is OperationCanceledException);
 				else if (!(error is OperationCanceledException))
-					throw error;
+					MessageService.ShowException(error);
 			} catch (Exception ex) {
 				MessageService.ShowException(ex);
 			}

src/Main/Base/Project/Src/Services/RefactoringService/FindReferenceService.cs

@@ -232,4 +232,32 @@ public interface ISymbolSearch
 
 		Task FindReferencesAsync(SymbolSearchArgs searchArguments, Action<SearchedFile> callback);
 	}
+
+	public sealed class CompositeSymbolSearch : ISymbolSearch
+	{
+		IEnumerable<ISymbolSearch> symbolSearches;
+
+		CompositeSymbolSearch(params ISymbolSearch[] symbolSearches)
+		{
+			this.symbolSearches = symbolSearches;
+		}
+
+		public static ISymbolSearch Create(ISymbolSearch symbolSearch1, ISymbolSearch symbolSearch2)
+		{
+			if (symbolSearch1 == null)
+				return symbolSearch2;
+			if (symbolSearch2 == null)
+				return symbolSearch1;
+			return new CompositeSymbolSearch(symbolSearch1, symbolSearch2);
+		}
+
+		public double WorkAmount {
+			get { return symbolSearches.Sum(s => s.WorkAmount); }
+		}
+
+		public Task FindReferencesAsync(SymbolSearchArgs searchArguments, Action<SearchedFile> callback)
+		{
+			return Task.WhenAll(symbolSearches.Select(s => s.FindReferencesAsync(searchArguments, callback)));
+		}
+	}
 }