Implemented Code Completion support of -> Operator

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@3591 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

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

@@ -95,6 +95,15 @@ namespace CSharpBinding
 			} else if (ch == '.') {
 				editor.ShowCompletionWindow(new CSharpCodeCompletionDataProvider(), ch);
 				return true;
+			} else if (ch == '>') {
+				if (IsInComment(editor)) return false;
+				LineSegment segment = editor.Document.GetLineSegmentForOffset(editor.ActiveTextAreaControl.Caret.Offset);
+				TextWord sign = segment.GetWord(editor.ActiveTextAreaControl.Caret.Column - 1);
+				if (sign.Word == "-") {
+					editor.ShowCompletionWindow(new PointerArrowCompletionDataProvider(), ch);
+					
+					return true;
+				}
 			}
 			
 			if (char.IsLetter(ch) && CodeCompletionOptions.CompleteWhenTyping) {
@@ -131,6 +140,34 @@ namespace CSharpBinding
 			}
 		}
 		
+		class PointerArrowCompletionDataProvider : CodeCompletionDataProvider
+		{
+			protected override ResolveResult Resolve(ExpressionResult expressionResult, int caretLineNumber, int caretColumn, string fileName, string fileContent)
+			{
+				ResolveResult rr = base.Resolve(expressionResult, caretLineNumber, caretColumn, fileName, fileContent);
+				if (rr != null && rr.ResolvedType != null) {
+					PointerReturnType prt = rr.ResolvedType.CastToDecoratingReturnType<PointerReturnType>();
+					if (prt != null)
+						return new ResolveResult(rr.CallingClass, rr.CallingMember, prt.BaseType);
+				}
+				return null;
+			}
+			
+			protected override ExpressionResult GetExpression(ICSharpCode.TextEditor.TextArea textArea)
+			{
+				ICSharpCode.TextEditor.Document.IDocument document = textArea.Document;
+				IExpressionFinder expressionFinder = ParserService.GetExpressionFinder(fileName);
+				if (expressionFinder == null) {
+					return new ExpressionResult(TextUtilities.GetExpressionBeforeOffset(textArea, textArea.Caret.Offset - 1));
+				} else {
+					ExpressionResult res = expressionFinder.FindExpression(document.GetText(0, textArea.Caret.Offset - 1), textArea.Caret.Offset - 1);
+					if (overrideContext != null)
+						res.Context = overrideContext;
+					return res;
+				}
+			}
+		}
+		
 		bool IsInComment(SharpDevelopTextAreaControl editor)
 		{
 			CSharpExpressionFinder ef = CreateExpressionFinder(editor.FileName);

src/Main/Base/Project/Src/TextEditor/Gui/Editor/CompletionWindow/AbstractCompletionDataProvider.cs

@@ -128,7 +128,7 @@ namespace ICSharpCode.SharpDevelop.DefaultEditor.Gui.Editor
 			return completionData.ToArray();
 		}
 		
-		protected ExpressionResult GetExpression(TextArea textArea)
+		protected virtual ExpressionResult GetExpression(TextArea textArea)
 		{
 			IDocument document = textArea.Document;
 			IExpressionFinder expressionFinder = ParserService.GetExpressionFinder(fileName);

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/CSharp/ExpressionFinder.cs

@@ -492,13 +492,14 @@ namespace ICSharpCode.SharpDevelop.Dom.CSharp
 					// do not reset context - TrackCurrentContext will take care of this
 					frame.lastExpressionStart = Location.Empty;
 					break;
+				case Tokens.Pointer:
 				case Tokens.Dot:
 				case Tokens.DoubleColon:
 					// let the current expression continue
 					break;
 				default:
 					if (Tokens.IdentifierTokens[token.kind]) {
-						if (lastToken != Tokens.Dot && lastToken != Tokens.DoubleColon) {
+						if (lastToken != Tokens.Dot && lastToken != Tokens.DoubleColon && lastToken != Tokens.Pointer) {
 							if (Tokens.ValidInsideTypeName[lastToken]) {
 								frame.SetDefaultContext();
 							}
@@ -821,7 +822,7 @@ namespace ICSharpCode.SharpDevelop.Dom.CSharp
 						resultStartOffset = lastExpressionStartOffset;
 					if (resultFrame.type == FrameType.Popped ||
 					    lastExpressionStartOffset != resultStartOffset ||
-					    token.kind == Tokens.Dot || token.kind == Tokens.DoubleColon)
+					    token.kind == Tokens.Dot || token.kind == Tokens.DoubleColon || token.kind == Tokens.Pointer)
 					{
 						
 						// now we can change the context based on the next token
@@ -865,7 +866,7 @@ namespace ICSharpCode.SharpDevelop.Dom.CSharp
 				if (token.kind == Tokens.EOF) break;
 				
 				if (frame.parent == null) {
-					if (token.kind == Tokens.Dot || token.kind == Tokens.DoubleColon
+					if (token.kind == Tokens.Dot || token.kind == Tokens.DoubleColon || token.kind == Tokens.Pointer
 					    || token.kind == Tokens.OpenParenthesis || token.kind == Tokens.OpenSquareBracket)
 					{
 						lastValidPos = LocationToOffset(token.Location);

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

@@ -522,6 +522,18 @@ namespace ICSharpCode.SharpDevelop.Dom.NRefactoryResolver
 		
 		public override object VisitPointerReferenceExpression(PointerReferenceExpression pointerReferenceExpression, object data)
 		{
+			ResolveResult targetRR = Resolve(pointerReferenceExpression.TargetObject);
+			if (targetRR == null)
+				return null;
+			PointerReturnType type = targetRR.ResolvedType.CastToDecoratingReturnType<PointerReturnType>();
+			if (type != null) {
+				TypeResolveResult typeRR = targetRR as TypeResolveResult;
+				return resolver.ResolveMember(type.BaseType, pointerReferenceExpression.Identifier,
+				                              pointerReferenceExpression.TypeArguments,
+				                              NRefactoryResolver.IsInvoked(pointerReferenceExpression),
+				                              true, null
+				                             );
+			}
 			return null;
 		}