added introduce method refactoring (not working in all cases yet)

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@5406 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

SharpDevelop.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 11.00
 # Visual Studio 2010
-# SharpDevelop 4.0.0.5293
+# SharpDevelop 4.0.0.5401
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Main", "Main", "{256F5C28-532C-44C0-8AB8-D8EC5E492E01}"
 	ProjectSection(SolutionItems) = postProject
 	EndProjectSection

src/Main/Base/Project/ICSharpCode.SharpDevelop.csproj

@@ -175,6 +175,10 @@
     <Compile Include="Src\Gui\Dialogs\GotoDialog.cs">
       <SubType>Form</SubType>
     </Compile>
+    <Compile Include="Src\Gui\Dialogs\IntroduceMethodDialog.xaml.cs">
+      <DependentUpon>IntroduceMethodDialog.xaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
     <Compile Include="Src\Gui\Dialogs\NewProjectDialog.cs" />
     <Compile Include="Src\Gui\Dialogs\NewProjectDialog.Designer.cs">
       <DependentUpon>NewProjectDialog.cs</DependentUpon>
@@ -807,6 +811,7 @@
     <Page Include="Src\Gui\Dialogs\GotoDialog.xaml">
       <DependentUpon>GotoDialog.cs</DependentUpon>
     </Page>
+    <Page Include="Src\Gui\Dialogs\IntroduceMethodDialog.xaml" />
     <Page Include="Src\Gui\Dialogs\TabbedOptionsDialog.xaml" />
     <Page Include="Src\Gui\Dialogs\TreeViewOptionsDialog.xaml" />
     <Page Include="Src\Gui\Workbench\WpfWorkbench.xaml" />

src/Main/Base/Project/Src/Gui/Dialogs/IntroduceMethodDialog.xaml

@@ -0,0 +1,40 @@
+<Window x:Class="ICSharpCode.SharpDevelop.Gui.IntroduceMethodDialog"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
+        xmlns:gui="clr-namespace:ICSharpCode.SharpDevelop.Gui" 
+        xmlns:addin="clr-namespace:ICSharpCode.SharpDevelop.Refactoring" 
+        xmlns:sd="http://icsharpcode.net/sharpdevelop/core"
+        WindowStartupLocation="CenterScreen" WindowStyle="ToolWindow" ResizeMode="NoResize"
+        Title="Introduce method" Height="400" Width="600">
+  <DockPanel>
+    <StackPanel Orientation="Horizontal" DockPanel.Dock="Bottom" HorizontalAlignment="Center">
+      <Button Content="{sd:Localize Global.OKButtonText}" Margin="3" Click="OKButtonClick" IsDefault="True" />
+      <Button Content="{sd:Localize Global.CancelButtonText}" Margin="3" Click="CancelButtonClick" IsCancel="True" />
+    </StackPanel>
+    <TextBlock Text="{sd:Localize Dialog.Refactoring.IntroduceMethod.Description}" DockPanel.Dock="Top" Margin="3" />
+    <Grid>
+      <Grid.RowDefinitions>
+        <RowDefinition Height="Auto" />
+        <RowDefinition Height="*" />
+        <RowDefinition Height="Auto" />
+        <RowDefinition Height="Auto" />
+      </Grid.RowDefinitions>
+      <Grid.ColumnDefinitions>
+        <ColumnDefinition Width="*" />
+      </Grid.ColumnDefinitions>
+      <RadioButton Margin="3" Content="Use existing class:" Name="rbExisting" IsChecked="True" GroupName="group" Grid.Column="0" Grid.Row="0" />
+      <ListBox Margin="3" Grid.Column="0" Grid.Row="1" Name="classList" IsEnabled="{Binding IsChecked, ElementName=rbExisting}">
+    	<ListBox.ItemTemplate>
+      		<DataTemplate>
+    			<TextBlock Text="{Binding FullyQualifiedName}" />
+    		</DataTemplate>
+      	</ListBox.ItemTemplate>
+      </ListBox>
+      <RadioButton Margin="3" Content="Create new class:" Name="rbNew" GroupName="group" Grid.Column="0" Grid.Row="2" />
+      <DockPanel Grid.Column="0" Grid.Row="3" IsEnabled="{Binding IsChecked, ElementName=rbNew}">
+        <Label DockPanel.Dock="Left" Content="Name:" Margin="3" />
+        <TextBox Name="newClassName" Text="Extensions" Margin="3" />
+      </DockPanel>
+    </Grid>
+  </DockPanel>
+</Window>

src/Main/Base/Project/Src/Gui/Dialogs/IntroduceMethodDialog.xaml.cs

@@ -0,0 +1,92 @@
+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="Siegfried Pammer" email="siegfriedpammer@gmail.com" />
+//     <version>$Revision$</version>
+// </file>
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+
+using ICSharpCode.NRefactory.Ast;
+using ICSharpCode.SharpDevelop.Dom;
+using ICSharpCode.SharpDevelop.Dom.Refactoring;
+using ICSharpCode.SharpDevelop.Editor;
+using ICSharpCode.SharpDevelop.Project;
+
+namespace ICSharpCode.SharpDevelop.Gui
+{
+	/// <summary>
+	/// Interaction logic for IntroduceMethodDialog.xaml
+	/// </summary>
+	public partial class IntroduceMethodDialog : Window
+	{
+		public IClass CallingClass { get; private set; }
+		
+		ITextEditor editor;
+		MethodDeclaration method;
+		
+		public IntroduceMethodDialog(IClass callingClass, MethodDeclaration method, ITextEditor editor)
+		{
+			InitializeComponent();
+			
+			CallingClass = callingClass;
+			this.editor = editor;
+			this.method = method;
+			
+			var classes = GetAllStaticClasses(callingClass.ProjectContent.Project as IProject);
+			
+			if (!classes.Any())
+				rbNew.IsChecked = true;
+			else {
+				classList.ItemsSource = classes;
+				classList.SelectedItem = classes.FirstOrDefault(c => c.Name.Contains("Extensions")) ?? classes.First();
+			}
+		}
+		
+		IEnumerable<IClass> GetAllStaticClasses(IProject project)
+		{
+			IProjectContent projectContent = ParserService.GetProjectContent(project);
+			if (projectContent != null) {
+				foreach (IClass c in projectContent.Classes) {
+					if (c.IsStatic)
+						yield return c;
+				}
+			}
+		}
+		
+		void OKButtonClick(object sender, RoutedEventArgs e)
+		{
+			CodeGenerator gen = CallingClass.ProjectContent.Language.CodeGenerator;
+			
+			if (rbExisting.IsChecked == true) {
+				IClass c = (IClass)classList.SelectedItem;
+				gen.InsertCodeAtEnd(c.BodyRegion, new RefactoringDocumentAdapter(editor.Document), method);
+			}
+			if (rbNew.IsChecked == true) {
+				TypeDeclaration type = new TypeDeclaration(Modifiers.Static, null);
+				
+				type.Name = newClassName.Text;
+				
+				type.AddChild(method);
+				
+				gen.InsertCodeAfter(CallingClass, new RefactoringDocumentAdapter(editor.Document), type);
+			}
+			Close();
+		}
+		
+		void CancelButtonClick(object sender, RoutedEventArgs e)
+		{
+			// do nothing
+			Close();
+		}
+	}
+}

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

@@ -16,12 +16,16 @@ using System.Windows.Input;
 
 using ICSharpCode.Core;
 using ICSharpCode.Core.Presentation;
+using ICSharpCode.NRefactory.Visitors;
 using ICSharpCode.SharpDevelop.Bookmarks;
 using ICSharpCode.SharpDevelop.Dom;
+using ICSharpCode.SharpDevelop.Dom.NRefactoryResolver;
+using ICSharpCode.SharpDevelop.Dom.Refactoring;
 using ICSharpCode.SharpDevelop.Editor;
 using ICSharpCode.SharpDevelop.Gui;
 using ICSharpCode.SharpDevelop.Gui.ClassBrowser;
 using ICSharpCode.SharpDevelop.Project;
+using Ast = ICSharpCode.NRefactory.Ast;
 
 namespace ICSharpCode.SharpDevelop.Refactoring
 {
@@ -129,6 +133,9 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			} else if (rr is UnknownConstructorCallResolveResult) {
 				item = MakeItemForResolveError((UnknownConstructorCallResolveResult)rr, expressionResult.Context, textEditor);
 				insertIndex = 0;	// Insert menu item at the topmost position.
+			} else if (rr is UnknownMethodResolveResult) {
+				item = MakeItemForResolveError((UnknownMethodResolveResult)rr, expressionResult.Context, textEditor);
+				insertIndex = 0;	// Insert menu item at the topmost position.
 			}
 			if (item != null) {
 				resultItems.Insert(insertIndex, item);
@@ -173,6 +180,181 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			return MakeItemForUnknownClass(rr.CallingClass, rr.TypeName, textArea);
 		}
 		
+		MenuItem MakeItemForResolveError(UnknownMethodResolveResult rr, ExpressionContext context, ITextEditor editor)
+		{
+			// TODO : make easy testable (hide dialog in test mode)
+			// TODO : add unit tests
+			
+			if (rr.Target == null)
+				return null;
+			
+			MenuItem item = new MenuItem() {
+				Header = "Introduce method " + rr.CallName + " in " + rr.Target.FullyQualifiedName,
+				Icon = ClassBrowserIconService.GotoArrow.CreateImage()
+			};
+			
+			IClass targetClass = rr.Target.GetUnderlyingClass();
+			
+			CodeGenerator gen = targetClass.ProjectContent.Language.CodeGenerator;
+			IAmbience ambience = targetClass.ProjectContent.Language.GetAmbience();
+			
+			ClassFinder finder = new ClassFinder(rr.CallingMember);
+			
+			ModifierEnum modifiers = ModifierEnum.None;
+			
+			if (rr.CallingClass == targetClass) {
+				if (rr.CallingMember != null)
+					modifiers |= (rr.CallingMember.Modifiers & ModifierEnum.Static);
+			} else {
+				modifiers |= ModifierEnum.Public;
+				if (rr.IsStaticContext)
+					modifiers |= ModifierEnum.Static;
+			}
+			
+			NRefactoryResolver resolver = new NRefactoryResolver(rr.CallingClass.ProjectContent.Language);
+			resolver.Initialize(ParserService.GetParseInformation(editor.FileName), editor.Caret.Line, editor.Caret.Column);
+			
+			Ast.INode node = resolver.ParseCurrentMember(editor.Document.Text);
+			resolver.RunLookupTableVisitor(node);
+			
+			InvocationExpressionLookupVisitor visitor = new InvocationExpressionLookupVisitor(editor);
+			node.AcceptVisitor(visitor, null);
+			
+			if (visitor.Expression == null)
+				return null;
+			
+			IReturnType type = resolver.GetExpectedTypeFromContext(visitor.Expression);
+			Ast.TypeReference typeRef = CodeGenerator.ConvertType(type, finder);
+			
+			if (typeRef.IsNull) {
+				if (visitor.Expression.Parent is Ast.ExpressionStatement)
+					typeRef = new Ast.TypeReference("void", true);
+				else
+					typeRef = new Ast.TypeReference("object", true);
+			}
+
+			item.Click += delegate {
+				Ast.MethodDeclaration method = new Ast.MethodDeclaration {
+					Name = rr.CallName,
+					Modifier = CodeGenerator.ConvertModifier(modifiers, finder),
+					TypeReference = typeRef,
+					Parameters = CreateParameters(rr, finder, visitor.Expression).ToList(),
+					Body = CodeGenerator.CreateNotImplementedBlock()
+				};
+				
+				if (targetClass.BodyRegion.IsEmpty) {
+					method.Parameters.Insert(0, new Ast.ParameterDeclarationExpression(CodeGenerator.ConvertType(rr.Target, finder), "thisInstance"));
+					method.IsExtensionMethod = true;
+					method.Modifier |= Ast.Modifiers.Static;
+					// TODO : combine code from IntroduceMethodDialog to remove code duplication
+					IntroduceMethodDialog dialog = new IntroduceMethodDialog(rr.CallingClass, method, editor);
+					dialog.Owner = WorkbenchSingleton.MainWindow;
+					dialog.ShowDialog();
+					return;
+				}
+				gen.InsertCodeAtEnd(targetClass.BodyRegion, new RefactoringDocumentAdapter(editor.Document), method);
+				ParserService.ParseCurrentViewContent();
+				// does not work yet, wrong method selected -> new method not yet present
+				// TODO : need to retrieve updated IClass instance
+				//IMethod newMember = targetClass.Methods.Last();
+				//IDocumentLine line = editor.Document.GetLine(newMember.BodyRegion.BeginLine + 1);
+				//int indentLength = DocumentUtilitites.GetWhitespaceAfter(editor.Document, line.Offset).Length;
+				//editor.Select(line.Offset + indentLength, "new NotImplementedException();".Length);
+			};
+			
+			return item;
+		}
+		
+		IEnumerable<Ast.ParameterDeclarationExpression> CreateParameters(UnknownMethodResolveResult rr, ClassFinder context, Ast.InvocationExpression invocation)
+		{
+			List<string> usedNames = new List<string>();
+			
+			for (int i = 0; i < rr.Arguments.Count; i++) {
+				IReturnType type = rr.Arguments[i];
+				var typeRef = CodeGenerator.ConvertType(type, context);
+				typeRef = typeRef.IsNull ? new Ast.TypeReference("object", true) : typeRef;
+				
+				Ast.Expression ex = invocation.Arguments[i];
+				string paramName = IsNumericType(type) ? "num" + i : type.Name + i.ToString();
+				
+				if (ex is Ast.IdentifierExpression) {
+					paramName = (ex as Ast.IdentifierExpression).Identifier;
+				}
+				
+				if (ex is Ast.MemberReferenceExpression) {
+					paramName = (ex as Ast.MemberReferenceExpression).MemberName;
+				}
+				
+				Ast.ParameterModifiers mod = Ast.ParameterModifiers.None;
+				
+				if (ex is Ast.DirectionExpression) {
+					var dex = ex as Ast.DirectionExpression;
+					
+					if (dex.Expression is Ast.IdentifierExpression) {
+						paramName = (dex.Expression as Ast.IdentifierExpression).Identifier;
+					}
+					
+					if (dex.Expression is Ast.MemberReferenceExpression) {
+						paramName = (dex.Expression as Ast.MemberReferenceExpression).MemberName;
+					}
+					
+					mod = dex.FieldDirection == Ast.FieldDirection.Out ? Ast.ParameterModifiers.Out : (dex.FieldDirection == Ast.FieldDirection.Ref ? Ast.ParameterModifiers.Ref : Ast.ParameterModifiers.None);
+				}
+				
+				paramName = rr.CallingClass.ProjectContent.Language.CodeGenerator.GetParameterName(paramName);
+				
+				if (usedNames.Contains(paramName))
+					paramName += i.ToString();
+				
+				usedNames.Add(paramName);
+				
+				yield return new Ast.ParameterDeclarationExpression(typeRef, paramName) {
+					ParamModifier = mod
+				};
+			}
+		}
+		
+		bool IsNumericType(IReturnType type)
+		{
+			return type.FullyQualifiedName == "System.Int32" ||
+				type.FullyQualifiedName == "System.Int16" ||
+				type.FullyQualifiedName == "System.Int64" ||
+				type.FullyQualifiedName == "System.Single" ||
+				type.FullyQualifiedName == "System.Double" ||
+				type.FullyQualifiedName == "System.UInt16" ||
+				type.FullyQualifiedName == "System.UInt32" ||
+				type.FullyQualifiedName == "System.UInt64";
+		}
+		
+		class InvocationExpressionLookupVisitor : AbstractAstVisitor
+		{
+			ITextEditor editor;
+			Ast.InvocationExpression expression;
+			
+			public Ast.InvocationExpression Expression {
+				get { return expression; }
+			}
+			
+			public InvocationExpressionLookupVisitor(ITextEditor editor)
+			{
+				this.editor = editor;
+				this.expression = null;
+			}
+			
+			public override object VisitInvocationExpression(Ast.InvocationExpression invocationExpression, object data)
+			{
+				int startOffset = editor.Document.PositionToOffset(invocationExpression.TargetObject.StartLocation.Line, invocationExpression.TargetObject.StartLocation.Column);
+				int endOffset = editor.Document.PositionToOffset(invocationExpression.EndLocation.Line, invocationExpression.EndLocation.Column);
+				
+				int offset = editor.Caret.Offset;
+				
+				if (offset >= startOffset && offset <= endOffset)
+					expression = invocationExpression;
+				
+				return base.VisitInvocationExpression(invocationExpression, data);
+			}
+		}
+		
 		MenuItem MakeItemForUnknownClass(IClass callingClass, string unknownClassName, ITextEditor textArea)
 		{
 			if (callingClass == null)

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/NRefactoryResolver/NRefactoryResolver.cs

@@ -1347,6 +1347,18 @@ namespace ICSharpCode.SharpDevelop.Dom.NRefactoryResolver
 					collectionType = null;
 				if (collectionType != null)
 					return new ElementReturnType(projectContent, collectionType);
+			} else if (expr.Parent is IndexerExpression) {
+				IndexerExpression indexerExpr = expr.Parent as IndexerExpression;
+				MemberResolveResult indexer = ResolveInternal(indexerExpr, ExpressionContext.Default)
+					as MemberResolveResult;
+				
+				if (indexer != null && indexer.ResolvedMember is IProperty) {
+					IProperty p = indexer.ResolvedMember as IProperty;
+					int position = indexerExpr.Indexes.IndexOf(expr);
+					if (position < 0 || position >= p.Parameters.Count)
+						return null;
+					return p.Parameters[position].ReturnType;
+				}
 			}
 			return null;
 		}

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/NRefactoryResolver/ResolveVisitor.cs

@@ -324,7 +324,33 @@ namespace ICSharpCode.SharpDevelop.Dom.NRefactoryResolver
 			if (resolver.Language == SupportedLanguage.VBNet) {
 				return CreateMemberResolveResult(GetVisualBasicIndexer(invocationExpression));
 			}
-			return null;
+
+			return CreateUnknownMethodResolveResult(invocationExpression);
+		}
+
+		UnknownMethodResolveResult CreateUnknownMethodResolveResult(InvocationExpression invocationExpression)
+		{
+			var arguments = invocationExpression.Arguments.Select(a => Resolve(a).ResolvedType).ToList();
+			
+			IReturnType target = resolver.CallingClass.DefaultReturnType;
+			string methodName = "";
+			bool isStatic = false;
+			
+			if (invocationExpression.TargetObject is IdentifierExpression) {
+				IdentifierExpression ie = invocationExpression.TargetObject as IdentifierExpression;
+				methodName = ie.Identifier;
+				isStatic = resolver.CallingMember.Modifiers.HasFlag(ModifierEnum.Static);
+			}
+			
+			if (invocationExpression.TargetObject is MemberReferenceExpression) {
+				MemberReferenceExpression mre = invocationExpression.TargetObject as MemberReferenceExpression;
+				var rr = Resolve(mre.TargetObject);
+				isStatic = rr is TypeResolveResult;
+				target = rr.ResolvedType;
+				methodName = mre.MemberName;
+			}
+			
+			return new UnknownMethodResolveResult(resolver.CallingClass, resolver.CallingMember, target, methodName, isStatic, arguments);
 		}
 		
 		ResolveResult FallbackResolveMethod(InvocationExpression invocation, MethodGroupResolveResult mgrr, IReturnType[] argumentTypes)
@@ -342,8 +368,7 @@ namespace ICSharpCode.SharpDevelop.Dom.NRefactoryResolver
 				}
 			}
 			
-			// TODO: method still not found, now return invalid ResolveResult describing the expected method
-			return null;
+			return CreateUnknownMethodResolveResult(invocation);
 		}
 		
 		public override object VisitLambdaExpression(LambdaExpression lambdaExpression, object data)

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/Refactoring/CodeGenerator.cs

@@ -298,6 +298,12 @@ namespace ICSharpCode.SharpDevelop.Dom.Refactoring
 		}
 		
 		#region Code generation / insertion
+		public virtual void InsertCodeAfter(IClass @class, IRefactoringDocument document, params AbstractNode[] nodes)
+		{
+			InsertCodeAfter(@class.BodyRegion.EndLine, document,
+			                GetIndentation(document, @class.BodyRegion.BeginLine), nodes);
+		}
+		
 		public virtual void InsertCodeAfter(IMember member, IRefactoringDocument document, params AbstractNode[] nodes)
 		{
 			if (member is IMethodOrProperty) {

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ResolveResult.cs

@@ -9,6 +9,8 @@ using System;
 using System.Collections;
 using System.Collections.Generic;
 
+using ICSharpCode.NRefactory.Ast;
+
 namespace ICSharpCode.SharpDevelop.Dom
 {
 	#region ResolveResult
@@ -941,6 +943,53 @@ namespace ICSharpCode.SharpDevelop.Dom
 	}
 	#endregion
 	
+	#region UnknownMethodResolveResult
+	/// <summary>
+	/// Used for calls to unknown methods.
+	/// </summary>
+	public class UnknownMethodResolveResult : ResolveResult
+	{
+		string callName;
+		bool isStaticContext;
+		List<IReturnType> arguments;
+		IReturnType target;
+		
+		public UnknownMethodResolveResult(IClass callingClass, IMember callingMember, IReturnType target, string callName, bool isStaticContext, List<IReturnType> arguments)
+			: base(callingClass, callingMember, null)
+		{
+			this.target = target == null ? callingClass.DefaultReturnType : target;
+			this.callName = callName;
+			this.arguments = arguments;
+			this.isStaticContext = isStaticContext;
+		}
+		
+		public bool IsStaticContext {
+			get { return isStaticContext; }
+		}
+		
+		public string CallName {
+			get { return callName; }
+		}
+		
+		public IReturnType Target {
+			get { return target; }
+		}
+		
+		public List<IReturnType> Arguments {
+			get { return arguments; }
+		}
+		
+		public override bool IsValid {
+			get { return false; }
+		}
+		
+		public override ResolveResult Clone()
+		{
+			return new UnknownMethodResolveResult(this.CallingClass, this.CallingMember, this.target, this.callName, this.isStaticContext, this.arguments);
+		}
+	}
+	#endregion
+	
 	#region UnknownConstructorCallResolveResult
 	/// <summary>
 	/// Used for constructor calls on unknown types.