implement method usage in method bodies

SharpDevelop.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 11.00
 # Visual Studio 2010
-# SharpDevelop 4.2.0.8363-alpha
+# SharpDevelop 4.2.0.8380-alpha
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Main", "Main", "{256F5C28-532C-44C0-8AB8-D8EC5E492E01}"
 	ProjectSection(SolutionItems) = postProject
 	EndProjectSection
@@ -505,10 +505,6 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SourceAnalysis", "src\AddIn
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MachineSpecifications", "src\AddIns\Analysis\MachineSpecifications\MachineSpecifications\MachineSpecifications.csproj", "{D1DA3B8F-7313-4BDA-8880-461C5F007751}"
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "CodeQuality", "CodeQuality", "{558479FB-A397-4EE9-A1AD-879F80D1FCD0}"
-	ProjectSection(SolutionItems) = postProject
-	EndProjectSection
-EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CodeQuality", "src\AddIns\Analysis\CodeQuality\CodeQuality.csproj", "{3C532D80-32B4-40E5-B5FE-BC6BAE1A00E7}"
 EndProject
 Project("{00000000-0000-0000-0000-000000000000}") = "Tools", "src\Tools\Tools.build", "{3DF4060F-5EE0-41CF-8096-F27355FD5511}"
@@ -1266,7 +1262,6 @@ Global
 		{08CE9972-283B-44F4-82FA-966F7DFA6B7A} = {F355E45F-F54F-4B42-8916-9A633A392789}
 		{CE498514-D12D-4B6E-AE0E-FEC29BD43748} = {F355E45F-F54F-4B42-8916-9A633A392789}
 		{D1DA3B8F-7313-4BDA-8880-461C5F007751} = {F355E45F-F54F-4B42-8916-9A633A392789}
-		{558479FB-A397-4EE9-A1AD-879F80D1FCD0} = {F355E45F-F54F-4B42-8916-9A633A392789}
+		{3C532D80-32B4-40E5-B5FE-BC6BAE1A00E7} = {F355E45F-F54F-4B42-8916-9A633A392789}
-		{3C532D80-32B4-40E5-B5FE-BC6BAE1A00E7} = {558479FB-A397-4EE9-A1AD-879F80D1FCD0}
 	EndGlobalSection
 EndGlobal

src/AddIns/Analysis/CodeQuality/CodeQuality.csproj

@@ -106,6 +106,10 @@
       <Name>Mono.Cecil</Name>
       <Private>False</Private>
     </ProjectReference>
+    <ProjectReference Include="..\..\..\Libraries\NewNRefactory\ICSharpCode.NRefactory.CSharp\ICSharpCode.NRefactory.CSharp.csproj">
+      <Project>{53DCA265-3C3C-42F9-B647-F72BA678122B}</Project>
+      <Name>ICSharpCode.NRefactory.CSharp</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\Libraries\NewNRefactory\ICSharpCode.NRefactory\ICSharpCode.NRefactory.csproj">
       <Project>{3B2A5653-EC97-4001-BB9B-D90F1AF2C371}</Project>
       <Name>ICSharpCode.NRefactory</Name>

src/AddIns/Analysis/CodeQuality/Engine/AssemblyAnalyzer.cs

@@ -5,7 +5,6 @@ using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Linq;
-using System.Reflection;
 using ICSharpCode.CodeQuality.Engine.Dom;
 using ICSharpCode.NRefactory.TypeSystem;
 using ICSharpCode.NRefactory.TypeSystem.Implementation;
@@ -18,13 +17,14 @@ namespace ICSharpCode.CodeQuality.Engine
 	/// </summary>
 	public class AssemblyAnalyzer
 	{
-		CecilLoader loader = new CecilLoader(true);
+		CecilLoader loader = new CecilLoader(true) { IncludeInternalMembers = true };
 		ICompilation compilation;
-		Dictionary<IAssembly, AssemblyNode> assemblyMappings;
+		internal Dictionary<IAssembly, AssemblyNode> assemblyMappings;
-		Dictionary<string, NamespaceNode> namespaceMappings;
+		internal Dictionary<string, NamespaceNode> namespaceMappings;
-		Dictionary<ITypeDefinition, TypeNode> typeMappings;
+		internal Dictionary<ITypeDefinition, TypeNode> typeMappings;
-		Dictionary<IMethod, MethodNode> methodMappings;
+		internal Dictionary<IMethod, MethodNode> methodMappings;
-		Dictionary<IField, FieldNode> fieldMappings;
+		internal Dictionary<IField, FieldNode> fieldMappings;
+		internal Dictionary<MemberReference, IEntity> cecilMappings;
 		List<string> fileNames;
 		
 		public AssemblyAnalyzer()
@@ -45,25 +45,54 @@ namespace ICSharpCode.CodeQuality.Engine
 			assemblyMappings = new Dictionary<IAssembly, AssemblyNode>();
 			namespaceMappings = new Dictionary<string, NamespaceNode>();
 			typeMappings = new Dictionary<ITypeDefinition, TypeNode>();
+			fieldMappings = new Dictionary<IField, FieldNode>();
+			methodMappings = new Dictionary<IMethod, MethodNode>();
+			cecilMappings = new Dictionary<MemberReference, IEntity>();
 			
 			foreach (var type in compilation.GetAllTypeDefinitions()) {
-				AnalyzeType(type);
+				ReadType(type);
+			}
+			foreach (TypeNode type in typeMappings.Values) {
+				foreach (var field in type.TypeDefinition.Fields) {
+					var node = new FieldNode(field);
+					fieldMappings.Add(field, node);
+					try {
+						var cecilObj = loader.GetCecilObject((IUnresolvedField)field.UnresolvedMember);
+						cecilMappings[cecilObj] = field;
+					} catch (InvalidOperationException) {}
+					type.Children.Add(node);
+				}
+				
+				foreach (var method in type.TypeDefinition.Methods) {
+					var node = new MethodNode(method);
+					methodMappings.Add(method, node);
+					try {
+						var cecilObj = loader.GetCecilObject((IUnresolvedMethod)method.UnresolvedMember);
+						cecilMappings[cecilObj] = method;
+					} catch (InvalidOperationException) {}
+					type.Children.Add(node);
+				}
+			}
+			ILAnalyzer analyzer = new ILAnalyzer(loadedAssemblies.Select(asm => loader.GetCecilObject(asm)).ToArray(), this);
+			foreach (var element in methodMappings) {
+				int cc;
+				try {
+					var cecilObj = loader.GetCecilObject((IUnresolvedMethod)element.Key.UnresolvedMember);
+					analyzer.Analyze(cecilObj.Body, element.Value, out cc);
+				} catch (InvalidOperationException) {}
 			}
 			return new ReadOnlyCollection<AssemblyNode>(assemblyMappings.Values.ToList());
 		}
 		
 		IEnumerable<IUnresolvedAssembly> LoadAssemblies()
 		{
-			var resolver = new DefaultAssemblyResolver();
+			var resolver = new AssemblyResolver();
-			foreach (var file in fileNames) {
+			List<AssemblyDefinition> assemblies = new List<AssemblyDefinition>();
-				var mainAsm = loader.LoadAssemblyFile(file);
+			foreach (var file in fileNames.Distinct(StringComparer.OrdinalIgnoreCase))
-				yield return mainAsm;
+				assemblies.Add(resolver.LoadAssemblyFile(file));
-				var referencedAssemblies = loader.GetCecilObject(mainAsm).Modules
+			foreach (var asm in assemblies.ToArray())
-					.SelectMany(m => m.AssemblyReferences)
+				assemblies.AddRange(asm.Modules.SelectMany(m => m.AssemblyReferences).Select(r => resolver.Resolve(r)));
-					.Select(r => resolver.Resolve(r));
+			return assemblies.Distinct().Select(asm => loader.LoadAssembly(asm));
-				foreach (var asm in referencedAssemblies)
-					yield return loader.LoadAssembly(asm);
-			}
 		}
 		
 		NamespaceNode GetOrCreateNamespace(AssemblyNode assembly, string namespaceName)
@@ -88,13 +117,31 @@ namespace ICSharpCode.CodeQuality.Engine
 			return result;
 		}
 		
-		void AnalyzeType(ITypeDefinition type)
+		void ReadType(ITypeDefinition type)
 		{
 			var asm = GetOrCreateAssembly(type.ParentAssembly);
 			var ns = GetOrCreateNamespace(asm, type.Namespace);
+			TypeNode parent;
 			var node = new TypeNode(type);
-			typeMappings.Add(type, node);
+			if (type.DeclaringTypeDefinition != null) {
+				if (typeMappings.TryGetValue(type.DeclaringTypeDefinition, out parent))
+					parent.Children.Add(node);
+				else
+					throw new Exception("TypeNode not found: " + type.DeclaringTypeDefinition.FullName);
+			} else
 				ns.Children.Add(node);
+			cecilMappings[loader.GetCecilObject(type.Parts.First())] = type;
+			typeMappings.Add(type, node);
+		}
+		
+		class AssemblyResolver : DefaultAssemblyResolver
+		{
+			public AssemblyDefinition LoadAssemblyFile(string fileName)
+			{
+				var assembly = AssemblyDefinition.ReadAssembly(fileName, new ReaderParameters { AssemblyResolver = this });
+				RegisterAssembly(assembly);
+				return assembly;
+			}
 		}
 	}
 }

src/AddIns/Analysis/CodeQuality/Engine/Dom/AssemblyNode.cs

@@ -3,7 +3,9 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using ICSharpCode.NRefactory.TypeSystem;
+using ICSharpCode.NRefactory.Utils;
 
 namespace ICSharpCode.CodeQuality.Engine.Dom
 {
@@ -27,21 +29,16 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 			get { return namespaces; }
 		}
 		
-		public IEnumerable<INode> Uses {
+		public IEnumerable<INode> Descendants {
-			get {
+			get { return TreeTraversal.PreOrder(Children, node => node.Children); }
-				throw new NotImplementedException();
-			}
 		}
 		
-		public IEnumerable<INode> UsedBy {
+		public IEnumerable<INode> Uses {
-			get {
+			get { return Descendants.SelectMany(node => node.Uses); }
-				throw new NotImplementedException();
-			}
 		}
 		
-		public void CalculateMetricsAndFreeze(IEnumerable<AssemblyNode> assemblies)
+		public IEnumerable<INode> UsedBy {
-		{
+			get { return Descendants.SelectMany(node => node.UsedBy); }
-			
 		}
 		
 		public Relationship GetRelationship(INode value)
@@ -49,6 +46,12 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 			Relationship r = new Relationship();
 			if (value == this)
 				r.AddRelationship(RelationshipType.Same);
+			if (Uses.Contains(value))
+				r.AddRelationship(RelationshipType.Uses);
+			if (UsedBy.Contains(value))
+				r.AddRelationship(RelationshipType.UsedBy);
+			if (Descendants.Contains(value))
+				r.AddRelationship(RelationshipType.Contains);
 			return r;
 		}
 	}

src/AddIns/Analysis/CodeQuality/Engine/Dom/EventNode.cs

@@ -3,6 +3,8 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
+
 using ICSharpCode.NRefactory.TypeSystem;
 
 namespace ICSharpCode.CodeQuality.Engine.Dom
@@ -16,9 +18,7 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 		}
 		
 		public IList<INode> Children {
-			get {
+			get { return null; }
-				throw new NotImplementedException();
-			}
 		}
 		
 		public IEnumerable<INode> Uses {
@@ -38,6 +38,10 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 			Relationship r = new Relationship();
 			if (value == this)
 				r.AddRelationship(RelationshipType.Same);
+			if (Uses.Contains(value))
+				r.AddRelationship(RelationshipType.Uses);
+			if (UsedBy.Contains(value))
+				r.AddRelationship(RelationshipType.UsedBy);
 			return r;
 		}
 	}

src/AddIns/Analysis/CodeQuality/Engine/Dom/FieldNode.cs

@@ -3,34 +3,34 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using ICSharpCode.NRefactory.TypeSystem;
 
 namespace ICSharpCode.CodeQuality.Engine.Dom
 {
 	public class FieldNode : INode
 	{
-		public string Name {
+		public IField FieldDefinition { get; private set; }
-			get {
+		
-				throw new NotImplementedException();
+		public FieldNode(IField fieldDefinition)
+		{
+			this.FieldDefinition = fieldDefinition;
 		}
+		
+		public string Name {
+			get { return FieldDefinition.PrintFullName(); }
 		}
 		
 		public IList<INode> Children {
-			get {
+			get { return null; }
-				throw new NotImplementedException();
-			}
 		}
 		
 		public IEnumerable<INode> Uses {
-			get {
+			get { return Enumerable.Empty<INode>(); }
-				throw new NotImplementedException();
-			}
 		}
 		
 		public IEnumerable<INode> UsedBy {
-			get {
+			get { return Enumerable.Empty<INode>(); }
-				throw new NotImplementedException();
-			}
 		}
 		
 		public Relationship GetRelationship(INode value)

src/AddIns/Analysis/CodeQuality/Engine/Dom/MethodNode.cs

@@ -3,34 +3,39 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
+
 using ICSharpCode.NRefactory.TypeSystem;
 
 namespace ICSharpCode.CodeQuality.Engine.Dom
 {
 	public class MethodNode : INode
 	{
-		public string Name {
+		public IMethod MethodDefinition { get; private set; }
-			get {
+		
-				throw new NotImplementedException();
+		public MethodNode(IMethod methodDefinition)
+		{
+			this.MethodDefinition = methodDefinition;
+			uses = new List<INode>();
+			usedBy = new List<INode>();
 		}
+		
+		public string Name {
+			get { return MethodDefinition.PrintFullName(); }
 		}
 		
 		public IList<INode> Children {
-			get {
+			get { return null; }
-				throw new NotImplementedException();
-			}
 		}
 		
+		internal IList<INode> uses, usedBy;
+		
 		public IEnumerable<INode> Uses {
-			get {
+			get { return uses; }
-				throw new NotImplementedException();
-			}
 		}
 		
 		public IEnumerable<INode> UsedBy {
-			get {
+			get { return usedBy; }
-				throw new NotImplementedException();
-			}
 		}
 		
 		public Relationship GetRelationship(INode value)
@@ -38,6 +43,10 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 			Relationship r = new Relationship();
 			if (value == this)
 				r.AddRelationship(RelationshipType.Same);
+			if (Uses.Contains(value))
+				r.AddRelationship(RelationshipType.Uses);
+			if (UsedBy.Contains(value))
+				r.AddRelationship(RelationshipType.UsedBy);
 			return r;
 		}
 	}

src/AddIns/Analysis/CodeQuality/Engine/Dom/NamespaceNode.cs

@@ -6,6 +6,7 @@ using System.Collections.Generic;
 using System.Linq;
 
 using ICSharpCode.NRefactory.TypeSystem;
+using ICSharpCode.NRefactory.Utils;
 
 namespace ICSharpCode.CodeQuality.Engine.Dom
 {
@@ -25,16 +26,16 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 			get { return types; }
 		}
 		
-		public IEnumerable<INode> Uses {
+		public IEnumerable<INode> Descendants {
-			get {
+			get { return TreeTraversal.PreOrder(Children, node => node.Children); }
-				throw new NotImplementedException();
 		}
+		
+		public IEnumerable<INode> Uses {
+			get { return Descendants.SelectMany(node => node.Uses); }
 		}
 		
 		public IEnumerable<INode> UsedBy {
-			get {
+			get { return Descendants.SelectMany(node => node.UsedBy); }
-				throw new NotImplementedException();
-			}
 		}
 		
 		public Relationship GetRelationship(INode value)
@@ -42,6 +43,12 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 			Relationship r = new Relationship();
 			if (value == this)
 				r.AddRelationship(RelationshipType.Same);
+			if (Uses.Contains(value))
+				r.AddRelationship(RelationshipType.Uses);
+			if (UsedBy.Contains(value))
+				r.AddRelationship(RelationshipType.UsedBy);
+			if (Descendants.Contains(value))
+				r.AddRelationship(RelationshipType.Contains);
 			return r;
 		}
 	}

src/AddIns/Analysis/CodeQuality/Engine/Dom/PropertyNode.cs

@@ -16,9 +16,7 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 		}
 		
 		public IList<INode> Children {
-			get {
+			get { return null; }
-				throw new NotImplementedException();
-			}
 		}
 		
 		public IEnumerable<INode> Uses {

src/AddIns/Analysis/CodeQuality/Engine/Dom/Relationship.cs

@@ -30,7 +30,7 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 		
 		public void AddRelationship(RelationshipType type)
 		{
-			if (type == RelationshipType.UseThis || type == RelationshipType.UsedBy)
+			if (type == RelationshipType.Uses || type == RelationshipType.UsedBy)
 				OccurrenceCount++;
 			
 			Relationships.Add(type);
@@ -48,13 +48,30 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 		}
 	}
 	
+	/// <summary>
+	/// Type of relationship between two INodes.
+	/// </summary>
 	public enum RelationshipType
 	{
-		OneWayTo,
+		/// <summary>
-		UseThis,
+		/// a and b are not related to each other.
-		UsedBy,
+		/// </summary>
-		Same,
+		None,
+		/// <summary>
+		/// a contains b.
+		/// </summary>
 		Contains,
-		None
+		/// <summary>
+		/// a uses b.
+		/// </summary>
+		Uses,
+		/// <summary>
+		/// a is used by b.
+		/// </summary>
+		UsedBy, 
+		/// <summary>
+		/// a and b are the same INode
+		/// </summary>
+		Same
 	}
 }

src/AddIns/Analysis/CodeQuality/Engine/Dom/TypeNode.cs

@@ -3,7 +3,10 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
+
 using ICSharpCode.NRefactory.TypeSystem;
+using ICSharpCode.NRefactory.Utils;
 
 namespace ICSharpCode.CodeQuality.Engine.Dom
 {
@@ -14,28 +17,29 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 		public TypeNode(ITypeDefinition typeDefinition)
 		{
 			this.TypeDefinition = typeDefinition;
+			children = new List<INode>();
 		}
 		
 		public string Name {
 			get { return TypeDefinition.Name; }
 		}
 		
+		List<INode> children;
+		
 		public IList<INode> Children {
-			get {
+			get { return children; }
-				return new List<INode>();
 		}
+		
+		public IEnumerable<INode> Descendants {
+			get { return TreeTraversal.PreOrder(Children, node => node.Children); }
 		}
 		
 		public IEnumerable<INode> Uses {
-			get {
+			get { return Descendants.SelectMany(node => node.Uses); }
-				throw new NotImplementedException();
-			}
 		}
 		
 		public IEnumerable<INode> UsedBy {
-			get {
+			get { return Descendants.SelectMany(node => node.UsedBy); }
-				throw new NotImplementedException();
-			}
 		}
 		
 		public Relationship GetRelationship(INode value)
@@ -43,6 +47,12 @@ namespace ICSharpCode.CodeQuality.Engine.Dom
 			Relationship r = new Relationship();
 			if (value == this)
 				r.AddRelationship(RelationshipType.Same);
+			if (Uses.Contains(value))
+				r.AddRelationship(RelationshipType.Uses);
+			if (UsedBy.Contains(value))
+				r.AddRelationship(RelationshipType.UsedBy);
+			if (Descendants.Contains(value))
+				r.AddRelationship(RelationshipType.Contains);
 			return r;
 		}
 	}

src/AddIns/Analysis/CodeQuality/Engine/ILAnalyzer.cs

@@ -2,6 +2,12 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
+using System.Collections.Generic;
+using System.Linq;
+using ICSharpCode.CodeQuality.Engine.Dom;
+using ICSharpCode.NRefactory.TypeSystem;
+using Mono.Cecil;
+using Mono.Cecil.Cil;
 
 namespace ICSharpCode.CodeQuality.Engine
 {
@@ -10,8 +16,72 @@ namespace ICSharpCode.CodeQuality.Engine
 	/// </summary>
 	public class ILAnalyzer
 	{
-		public ILAnalyzer()
+		AssemblyDefinition[] assemblies;
+		AssemblyAnalyzer mappings;
+		
+		public ILAnalyzer(AssemblyDefinition[] assemblies, AssemblyAnalyzer mappings)
+		{
+			if (assemblies == null)
+				throw new ArgumentNullException("assemblies");
+			this.assemblies = assemblies;
+			this.mappings = mappings;
+		}
+		
+		public void Analyze(MethodBody body, MethodNode analyzedMethod, out int cyclomaticComplexity)
 		{
+			cyclomaticComplexity = 0;
+			
+			if (body == null)
+				return;
+			
+			foreach (var instruction in body.Instructions) {
+				// IL cyclomatic complexity
+				if (instruction.OpCode.FlowControl == FlowControl.Cond_Branch)
+					cyclomaticComplexity++;
+
+				var operand = ReadOperand(instruction);
+				
+				if (operand is MethodDefinition) {
+					var md = (MethodDefinition)operand;
+					if (assemblies.Contains(md.DeclaringType.Module.Assembly) && mappings.cecilMappings.ContainsKey(md)) {
+						var opMethod = (IMethod)mappings.cecilMappings[md];
+						var methodNode = mappings.methodMappings[opMethod];
+						analyzedMethod.uses.Add(methodNode);
+						methodNode.usedBy.Add(analyzedMethod);
+					}
+				}
+//
+//				if (operand is MethodDefinition && ((MethodDefinition)operand).DeclaringType.Module.Assembly == assemblyDefinition) {
+//					var md = (MethodDefinition)operand;
+//					if (md.DeclaringType.Name == "" || md.DeclaringType.Name.StartsWith("<")) {
+//						// TODO : Handle generated members
+//					} else {
+//						var opMethod = (IMethod)cecilMappings[md];
+//						var methodNode = methodMappings[opMethod];
+//						m.typeUses.Add(methodNode.DeclaringType);
+//						m.methodUses.Add(methodNode);
+//					}
+//				}
+//
+//				if (operand is FieldDefinition && ((FieldDefinition)operand).DeclaringType.Module.Assembly == assemblyDefinition) {
+//					var fd = (FieldDefinition)operand;
+//					if (fd.DeclaringType.Name == "" || fd.DeclaringType.Name.StartsWith("<")) {
+//						// TODO : Handle generated members
+//					} else {
+//						var field = (IField)cecilMappings[fd];
+//						var fieldNode = fieldMappings[field];
+//						m.fieldUses.Add(fieldNode);
+//					}
+//				}
+			}
+		}
+		
+		public object ReadOperand(Instruction instruction)
+		{
+			while (instruction.Operand is Instruction)
+				instruction = (Instruction)instruction.Operand;
+
+			return instruction.Operand;
 		}
 	}
 }

src/AddIns/Analysis/CodeQuality/Gui/Controls/DependencyMatrix.cs

@@ -22,7 +22,7 @@ namespace ICSharpCode.CodeQuality.Gui
 			
 			// add other way
 			foreach (var relationship in fromRelationship.Relationships) {
-				if (relationship == RelationshipType.UseThis)
+				if (relationship == RelationshipType.Uses)
 					toRelationship.AddRelationship(RelationshipType.UsedBy);
 			}
 			

src/AddIns/Analysis/CodeQuality/Gui/DependencyMatrixView.xaml

@@ -70,7 +70,7 @@
 		              Grid.Row="2" Grid.Column="2" 
 		              CanContentScroll="True"
 		              ScrollChanged="ViewScrollChanged">
-			<gui:DependencyMatrixControl x:Name="matrix" HoveredCellChanged="MatrixHoveredCellChanged"/>
+			<gui:DependencyMatrixControl x:Name="matrix" HoveredCellChanged="MatrixHoveredCellChanged" MouseMove="MatrixMouseMove" MouseLeave="MatrixMouseLeave" />
 		
 		</ScrollViewer>
 	</Grid>

src/AddIns/Analysis/CodeQuality/Gui/DependencyMatrixView.xaml.cs

@@ -15,7 +15,6 @@ using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Shapes;
 using System.Windows.Threading;
-
 using ICSharpCode.CodeQuality;
 using ICSharpCode.CodeQuality.Engine.Dom;
 using ICSharpCode.SharpDevelop;
@@ -30,6 +29,7 @@ namespace ICSharpCode.CodeQuality.Gui
 	{
 		ScrollViewer topTreeScrollViewer, leftTreeScrollViewer;
 		NodeDescriptionViewModel nodeDescriptionViewModel;
+		ToolTip infoTooltip;
 		
 		public DependencyMatrixView()
 		{
@@ -44,6 +44,7 @@ namespace ICSharpCode.CodeQuality.Gui
 			matrix.Colorizer = new DependencyColorizer();
 			matrix.ScrollOwner = scrollViewer;
 			
+			infoTooltip = new ToolTip() { StaysOpen = false };
 		}
 		
 		
@@ -64,6 +65,7 @@ namespace ICSharpCode.CodeQuality.Gui
 			topCol.CollectionChanged += BuildTopINodeList;
 			
 			var matrix = new DependencyMatrix();
+			if (nodes != null)
 			AddChildrenToMatrix(matrix, nodes);
 			this.matrix.Matrix = matrix;
 			BuildLeftINodeList(null, null);
@@ -76,6 +78,7 @@ namespace ICSharpCode.CodeQuality.Gui
 			foreach (var node in nodes) {
 				matrix.AddColumn(node);
 				matrix.AddRow(node);
+				if (node.Children != null)
 				AddChildrenToMatrix(matrix, node.Children);
 			}
 		}
@@ -145,6 +148,7 @@ namespace ICSharpCode.CodeQuality.Gui
 				matrix.HighlightLine(HeaderType.Rows, n.Node);
 				leftTree.SelectedItem = n;
 			}
+			infoTooltip.IsOpen = false;
 		}
 		
 		void TopTreeMouseMove(object sender, System.Windows.Input.MouseEventArgs e)
@@ -155,6 +159,7 @@ namespace ICSharpCode.CodeQuality.Gui
 				matrix.HighlightLine(HeaderType.Columns, n.Node);
 				topTree.SelectedItem = n;
 			}
+			infoTooltip.IsOpen = false;
 		}
 		
 		MatrixTreeNode ConvertNode(DependencyObject node)
@@ -175,6 +180,32 @@ namespace ICSharpCode.CodeQuality.Gui
 				topTree.SelectedItem = topTree.Items[e.HoveredCell.ColumnIndex + 1];
 			}
 		}
+		
+		void MatrixMouseMove(object sender, MouseEventArgs e)
+		{
+			infoTooltip.Placement = PlacementMode.Relative;
+			infoTooltip.VerticalOffset = 15;
+			infoTooltip.PlacementTarget = this;
+			infoTooltip.Content = GetTooltip(matrix.HoveredCell.Value);
+			infoTooltip.IsOpen = true;
+		}
+		
+		object GetTooltip(Relationship relationship)
+		{
+			string text = "is not related to";
+			if (relationship.Relationships.Any(r => r == RelationshipType.Uses))
+				text = "uses";
+			else if (relationship.Relationships.Any(r => r == RelationshipType.UsedBy))
+				text = "is used by";
+			else if (relationship.Relationships.Any(r => r == RelationshipType.Same))
+				text = "is the same as";
+			return string.Format("{0} {1} {2}", relationship.From.Name, text, relationship.To.Name);
+		}
+		
+		void MatrixMouseLeave(object sender, MouseEventArgs e)
+		{
+			infoTooltip.IsOpen = false;
+		}
 		#endregion
 	}
 }

src/AddIns/Analysis/CodeQuality/Gui/NodeIconService.cs

@@ -15,7 +15,7 @@ namespace ICSharpCode.CodeQuality.Gui
 	public static class NodeIconService
 	{
 		static readonly BitmapSource NamespaceNode = GetImage("Icons.16x16.NameSpace");
-		static readonly BitmapSource Assembly = GetImage("Icons.16x16.Assembly");
+		static readonly BitmapSource Assembly = GetImage("Icons.16x16.Reference");
 
 		static readonly BitmapSource Class = GetImage("Icons.16x16.Class");
 		static readonly BitmapSource InternalClass = GetImage("Icons.16x16.InternalClass");

src/AddIns/Analysis/CodeQuality/Utils/DependencyColorizer.cs

@@ -41,10 +41,10 @@ namespace ICSharpCode.CodeQuality
 			if (relationship == null)
 				return Colors.Transparent;
 			
-			if (relationship.Relationships.Any(r => r == RelationshipType.UseThis))
+			if (relationship.Relationships.Any(r => r == RelationshipType.Uses))
-				return Colors.LightBlue;
+				return Colors.LightGreen;
 			if (relationship.Relationships.Any(r => r == RelationshipType.UsedBy))
-				return Colors.Violet;
+				return Colors.LightBlue;
 			if (relationship.Relationships.Any(r => r == RelationshipType.Same))
 				return Colors.Gray;
 			

src/AddIns/Analysis/CodeQuality/Utils/Extensions.cs

@@ -6,9 +6,10 @@ using System.Collections.Generic;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Media;
-
 using ICSharpCode.CodeQuality.Engine.Dom;
 using ICSharpCode.CodeQuality.Gui;
+using ICSharpCode.NRefactory.CSharp;
+using ICSharpCode.NRefactory.TypeSystem;
 using ICSharpCode.TreeView;
 
 namespace ICSharpCode.CodeQuality
@@ -21,6 +22,7 @@ namespace ICSharpCode.CodeQuality
 		public static void FillTree(SharpTreeView tree, IEnumerable<INode> rootNodes)
 		{
 			tree.Root = new SharpTreeNode();
+			if (rootNodes != null)
 				CreateItems(rootNodes, tree.Root);
 		}
 		
@@ -29,6 +31,7 @@ namespace ICSharpCode.CodeQuality
 			foreach (INode node in nodes) {
 				var item = new MatrixTreeNode(node);
 				parent.Children.Add(item);
+				if (node.Children != null)
 					CreateItems(node.Children, item);
 			}
 		}
@@ -73,5 +76,12 @@ namespace ICSharpCode.CodeQuality
 				(byte)(c1.G * amountFrom + c2.G * percent),
 				(byte)(c1.B * amountFrom + c2.B * percent));
 		}
+		
+		static readonly IAmbience amb = new CSharpAmbience() { ConversionFlags = ConversionFlags.ShowParameterList | ConversionFlags.ShowParameterNames | ConversionFlags.ShowReturnType | ConversionFlags.ShowTypeParameterList };
+		
+		public static string PrintFullName(this IEntity entity)
+		{
+			return amb.ConvertEntity(entity);
+		}
 	}
 }

src/AddIns/Analysis/CodeQuality/Utils/Utils.cs

@@ -2,8 +2,11 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
+using System.Collections.Generic;
 using System.Runtime.InteropServices;
 
+using Mono.Cecil;
+
 namespace ICSharpCode.CodeQuality
 {
 	/// <summary>
@@ -14,4 +17,21 @@ namespace ICSharpCode.CodeQuality
 		[DllImport("gdi32.dll")]
 		public static extern bool DeleteObject(IntPtr hObject);
 	}
+	
+	public class AssemblyNameReferenceComparer : IEqualityComparer<AssemblyNameReference>
+	{
+		public bool Equals(AssemblyNameReference x, AssemblyNameReference y)
+		{
+			if (x == y) return true;
+			if (x != null && y != null)
+				return x.FullName == y.FullName;
+			return false;
+		}
+		
+		public int GetHashCode(AssemblyNameReference obj)
+		{
+			if (obj == null) return 0;
+			return obj.FullName.GetHashCode();
+		}
+	}
 }