enabled completing existing expressions on ctrl+space

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/vbnet@6136 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/BackendBindings/VBNetBinding/Project/Src/CompletionDataHelper.cs

@@ -62,6 +62,14 @@ namespace ICSharpCode.VBNetBinding
 			if (addedKeywords)
 				AddTemplates(editor, result);
 			
+			if (pressedKey == '\0') { // ctrl+space
+				char prevChar =  editor.Caret.Offset > 0 ? editor.Document.GetCharAt(editor.Caret.Offset - 1) : '\0';
+				string word = char.IsLetterOrDigit(prevChar) || prevChar == '_' ? editor.GetWordBeforeCaret() : "";
+				
+				if (!string.IsNullOrWhiteSpace(word))
+					result.PreselectionLength = word.Length;
+			}
+			
 			return result;
 		}
 		

src/AddIns/BackendBindings/VBNetBinding/Project/Src/VBNetCompletionBinding.cs

@@ -46,10 +46,6 @@ namespace ICSharpCode.VBNetBinding
 				editor.Document.Remove(editor.SelectionStart, editor.SelectionLength);
 			}
 			
-			if (ch == ' ') {
-
-			}
-			
 			VBNetExpressionFinder ef = new VBNetExpressionFinder(ParserService.GetParseInformation(editor.FileName));
 			
 			ExpressionResult result;
@@ -211,15 +207,11 @@ namespace ICSharpCode.VBNetBinding
 				prevChar = cursor > 1 ? editor.Document.GetCharAt(cursor - 1) : ' ';
 			}
 			
-			if (!char.IsLetterOrDigit(prevChar) && prevChar != '.') {
-				VBNetExpressionFinder ef = new VBNetExpressionFinder(ParserService.GetParseInformation(editor.FileName));
-				ExpressionResult result = ef.FindExpression(editor.Document.Text, cursor);
-				LoggingService.Debug("CC: Beginning to type a word, result=" + result + ", context=" + result.Context);
-				editor.ShowCompletionWindow(CompletionDataHelper.GenerateCompletionData(result, editor, ' '));
-				return true;
-			}
-			
-			return false;
+			VBNetExpressionFinder ef = new VBNetExpressionFinder(ParserService.GetParseInformation(editor.FileName));
+			ExpressionResult result = ef.FindExpression(editor.Document.Text, cursor);
+			LoggingService.Debug("CC: Beginning to type a word, result=" + result + ", context=" + result.Context);
+			editor.ShowCompletionWindow(CompletionDataHelper.GenerateCompletionData(result, editor, '\0'));
+			return true;
 		}
 	}
 }

src/Libraries/NRefactory/Project/Src/Lexer/VBNet/ExpressionFinder.atg

@@ -945,7 +945,7 @@ Statement =
 
 VariableDeclarationStatement =
 	( "Dim" | "Static" | "Const" )
-	(. PushContext(Context.Identifier, la, t);	.)
+	(. PushContext(Context.Identifier, la, t); .) (.OnEachPossiblePath: SetIdentifierExpected(la); .)
 	Identifier (. PopContext(); .) [ "?" ] [ ( "(" { "," } ")" ) ]
 	{ ","
 		(. PushContext(Context.Identifier, la, t); .) (.OnEachPossiblePath: SetIdentifierExpected(la); .)

src/Libraries/NRefactory/Project/Src/Lexer/VBNet/Parser.cs

@@ -1333,13 +1333,13 @@ partial class ExpressionFinder {
 	
 	public void InformToken(Token la) 
 	{
-		if (la != null) {
-			nextTokenIsPotentialStartOfExpression = false;
-			readXmlIdentifier = false;
-			nextTokenIsStartOfImportsOrAccessExpression = false;
+		nextTokenIsPotentialStartOfExpression = false;
+		readXmlIdentifier = false;
+		nextTokenIsStartOfImportsOrAccessExpression = false;
+		wasQualifierTokenAtStart = false;
+		
+		//if (la != null)
 			identifierExpected = false;
-			wasQualifierTokenAtStart = false;
-		}
 		switchlbl: switch (currentState) {
 			case 0: {
 				PushContext(Context.Global, la, t);
@@ -4814,7 +4814,8 @@ partial class ExpressionFinder {
 				}
 			}
 			case 335: {
-				PushContext(Context.Identifier, la, t);	
+				PushContext(Context.Identifier, la, t);
+				SetIdentifierExpected(la);
 				stateStack.Push(336);
 				goto case 154;
 			}

src/Libraries/NRefactory/Project/Src/Lexer/VBNet/PushParser.frame

@@ -67,13 +67,13 @@ partial class ExpressionFinder {
 	
 	public void InformToken(Token la) 
 	{
-		if (la != null) {
-			nextTokenIsPotentialStartOfExpression = false;
-			readXmlIdentifier = false;
-			nextTokenIsStartOfImportsOrAccessExpression = false;
+		nextTokenIsPotentialStartOfExpression = false;
+		readXmlIdentifier = false;
+		nextTokenIsStartOfImportsOrAccessExpression = false;
+		wasQualifierTokenAtStart = false;
+		
+		//if (la != null)
 			identifierExpected = false;
-			wasQualifierTokenAtStart = false;
-		}
 		-->informToken
 		if (la != null) t = la;
 	}

src/Main/Base/Test/VBExpressionFinderTests.cs

@@ -91,7 +91,7 @@ End Class
 		[Test]
 		public void FindSimple()
 		{
-			Find(program2, "sole", 0,"Con", ExpressionContext.MethodBody);
+			Find(program2, "sole", 0, "Con", ExpressionContext.MethodBody);
 		}
 		
 		[Test]