implemented partial XAML markup extension resolving

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@4293 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/BackendBindings/XamlBinding/XamlBinding/CompletionDataHelper.cs

@@ -53,6 +53,8 @@ namespace ICSharpCode.XamlBinding
 			int offsetFromValueStart = Utils.GetOffsetFromValueStart(text, offset);
 			AttributeValue value = null;
 			
+			value = MarkupExtensionParser.ParseValue(attributeValue);
+			
 			XamlContextDescription description = XamlContextDescription.InTag;
 			
 			if (path == null || path.Elements.Count == 0) {
@@ -363,7 +365,7 @@ namespace ICSharpCode.XamlBinding
 		
 		public static IEnumerable<IInsightItem> CreateMarkupExtensionInsight(XamlCompletionContext context, ParseInformation info, ITextEditor editor)
 		{
-			var markup = GetInnermostMarkup(context.AttributeValue.ExtensionValue);
+			var markup = Utils.GetInnermostMarkup(context.AttributeValue.ExtensionValue);
 			var trr = ResolveMarkupExtensionType(markup, context);
 			
 			if (trr != null) {
@@ -384,7 +386,7 @@ namespace ICSharpCode.XamlBinding
 			var list = new XamlCompletionItemList();
 			var path = XmlParser.GetActiveElementStartPathAtIndex(editor.Document.Text, editor.Caret.Offset);
 			
-			var markup = GetInnermostMarkup(context.AttributeValue.ExtensionValue);
+			var markup = Utils.GetInnermostMarkup(context.AttributeValue.ExtensionValue);
 			
 			var trr = ResolveMarkupExtensionType(markup, context);
 			
@@ -593,22 +595,6 @@ namespace ICSharpCode.XamlBinding
 		{
 			return null;
 		}
-		
-		public static MarkupExtensionInfo GetInnermostMarkup(MarkupExtensionInfo markup)
-		{
-			var last = markup.PositionalArguments.LastOrDefault();
-			
-			if (markup.NamedArguments.Count > 0)
-				last = markup.NamedArguments.LastOrDefault().Value;
-			
-			if (last != null) {
-				if (!last.IsString) {
-					return GetInnermostMarkup(last.ExtensionValue);
-				}
-			}
-			
-			return markup;
-		}
 
 		public static TypeResolveResult ResolveMarkupExtensionType(MarkupExtensionInfo markup, XamlCompletionContext context)
 		{

src/AddIns/BackendBindings/XamlBinding/XamlBinding/MarkupExtensionInfo.cs

@@ -20,6 +20,8 @@ namespace ICSharpCode.XamlBinding
 		public string ExtensionType { get; set; }
 		public IList<AttributeValue> PositionalArguments { get; private set; }
 		public IDictionary<string, AttributeValue> NamedArguments { get; private set; }
+		
+		public int StartOffset { get; set; }
 				
 		public MarkupExtensionInfo()
 			: this(string.Empty, new List<AttributeValue>(), new Dictionary<string, AttributeValue>(StringComparer.OrdinalIgnoreCase))
@@ -39,6 +41,8 @@ namespace ICSharpCode.XamlBinding
 		string stringValue;
 		MarkupExtensionInfo extensionValue;
 		
+		public int StartOffset { get; set; }
+		
 		public bool IsString {
 			get { return stringValue != null; }
 		}

src/AddIns/BackendBindings/XamlBinding/XamlBinding/MarkupExtensionParser.cs

@@ -19,25 +19,28 @@ namespace ICSharpCode.XamlBinding
 				var tokenizer = new MarkupExtensionTokenizer(text);
 				
 				string argumentName = null;
+				int namedArgsStart = 0;
 				
 				var token = tokenizer.NextToken();
 				while (token.Kind != MarkupExtensionTokenKind.EndOfFile) {
 					switch (token.Kind) {
 						case MarkupExtensionTokenKind.TypeName:
 							info.ExtensionType = token.Value;
+							info.StartOffset = token.StartOffset;
 							break;
 						case MarkupExtensionTokenKind.MemberName:
 							// if there is an open member without a value add the member name
 							if (argumentName != null)
 								info.NamedArguments.Add(argumentName, new AttributeValue(string.Empty));
 							argumentName = token.Value;
+							namedArgsStart = token.StartOffset;
 							break;
 						case MarkupExtensionTokenKind.String:
 							if (argumentName != null) {
-								info.NamedArguments.Add(argumentName, ParseValue(token.Value));
+								info.NamedArguments.Add(argumentName, ParseValue(token.Value, namedArgsStart));
 								argumentName = null;
 							} else {
-								info.PositionalArguments.Add(ParseValue(token.Value));
+								info.PositionalArguments.Add(ParseValue(token.Value, token.StartOffset));
 							}
 							break;
 					}
@@ -51,14 +54,19 @@ namespace ICSharpCode.XamlBinding
 		}
 		
 		public static AttributeValue ParseValue(string text)
+		{
+			return ParseValue(text, 0);
+		}
+		
+		public static AttributeValue ParseValue(string text, int offset)
 		{
 			if (string.IsNullOrEmpty(text))
-				return new AttributeValue(string.Empty);
+				return new AttributeValue(string.Empty) { StartOffset = offset };
 			
 			if (text.StartsWith("{", StringComparison.OrdinalIgnoreCase))
-				return new AttributeValue(Parse(text));
+				return new AttributeValue(Parse(text)) { StartOffset = offset };
 			else
-				return new AttributeValue(text);
+				return new AttributeValue(text) { StartOffset = offset };
 		}
 	}
 }

src/AddIns/BackendBindings/XamlBinding/XamlBinding/MarkupExtensionToken.cs

@@ -14,6 +14,8 @@ namespace ICSharpCode.XamlBinding
 		public MarkupExtensionTokenKind Kind { get; private set; }
 		public string Value { get; private set; }
 		
+		public int StartOffset { get; set; }
+		
 		public MarkupExtensionToken(MarkupExtensionTokenKind kind, string value)
 		{
 			this.Kind = kind;

src/AddIns/BackendBindings/XamlBinding/XamlBinding/MarkupExtensionTokenizer.cs

@@ -27,6 +27,8 @@ namespace ICSharpCode.XamlBinding
 		
 		string text;
 		int pos;
+		int startPos;
+		
 		Queue<MarkupExtensionToken> tokens = new Queue<MarkupExtensionToken>();
 		
 		/// <summary>
@@ -51,7 +53,7 @@ namespace ICSharpCode.XamlBinding
 		
 		void AddToken(MarkupExtensionTokenKind kind, string val)
 		{
-			tokens.Enqueue(new MarkupExtensionToken(kind, val));
+			tokens.Enqueue(new MarkupExtensionToken(kind, val) { StartOffset = startPos });
 		}
 		
 		void ParseBeginning()
@@ -75,16 +77,20 @@ namespace ICSharpCode.XamlBinding
 					case '}':
 						AddToken(MarkupExtensionTokenKind.CloseBrace, "}");
 						pos++;
+						startPos = pos;
 						break;
 					case '=':
 						AddToken(MarkupExtensionTokenKind.Equals, "=");
 						pos++;
+						startPos = pos;
 						break;
 					case ',':
 						AddToken(MarkupExtensionTokenKind.Comma, ",");
 						pos++;
+						startPos = pos;
 						break;
 					default:
+						startPos = pos;
 						MembernameOrString();
 						break;
 				}

src/AddIns/BackendBindings/XamlBinding/XamlBinding/Utils.cs

@@ -206,5 +206,53 @@ namespace ICSharpCode.XamlBinding
 			
 			return r;
 		}
+		
+		
+		public static MarkupExtensionInfo GetInnermostMarkup(MarkupExtensionInfo markup)
+		{
+			var last = markup.PositionalArguments.LastOrDefault();
+			
+			if (markup.NamedArguments.Count > 0)
+				last = markup.NamedArguments.LastOrDefault().Value;
+			
+			if (last != null) {
+				if (!last.IsString) {
+					return GetInnermostMarkup(last.ExtensionValue);
+				}
+			}
+			
+			return markup;
+		}
+		
+		/// <summary>
+		/// Gets the of a markup extension at the given position.
+		/// </summary>
+		/// <param name="info">The markup extension data to parse.</param>
+		/// <param name="offset">The offset to look at.</param>
+		/// <returns>
+		/// A string, if the at offset is the extension type. <br />
+		/// An AttributeValue, if at the offset is a positional argument. <br />
+		/// A KeyValuePair&lt;string, AttributeValue&gt;, if at the offset is a named argument.
+		/// </returns>
+		public static object GetMarkupDataAtPosition(MarkupExtensionInfo info, int offset)
+		{
+			object previous = info.ExtensionType;
+			
+			Debug.Print("offset: " + offset);
+			
+			foreach (var item in info.PositionalArguments) {
+				if (item.StartOffset > offset)
+					break;
+				previous = item.IsString ? item : GetMarkupDataAtPosition(item.ExtensionValue, offset - item.StartOffset);
+			}
+			
+			foreach (var pair in info.NamedArguments) {
+				if (pair.Value.StartOffset > offset)
+					break;
+				previous = pair.Value.IsString ? pair.Value : GetMarkupDataAtPosition(pair.Value.ExtensionValue, offset - pair.Value.StartOffset);
+			}
+			
+			return previous;
+		}
 	}
 }

src/AddIns/BackendBindings/XamlBinding/XamlBinding/XamlCompletionItemList.cs

@@ -51,7 +51,7 @@ namespace ICSharpCode.XamlBinding
 								AttributeValue value = MarkupExtensionParser.ParseValue(valuePart);
 								
 								if (value != null && !value.IsString) {
-									var markup = CompletionDataHelper.GetInnermostMarkup(value.ExtensionValue);
+									var markup = Utils.GetInnermostMarkup(value.ExtensionValue);
 									if (markup.NamedArguments.Count > 0 || markup.PositionalArguments.Count > 0) {
 										int oldOffset = context.Editor.Caret.Offset;
 										context.Editor.Caret.Offset = context.StartOffset;

src/AddIns/BackendBindings/XamlBinding/XamlBinding/XamlResolver.cs

@@ -23,6 +23,7 @@ namespace ICSharpCode.XamlBinding
 	public class XamlResolver : IResolver
 	{
 		IClass callingClass;
+		string fileContent;
 		string resolveExpression;
 		int caretLine, caretColumn;
 		XamlContext context;
@@ -32,26 +33,58 @@ namespace ICSharpCode.XamlBinding
 			this.resolveExpression = expressionResult.Expression;
 			this.caretLine = expressionResult.Region.BeginLine;
 			this.caretColumn = expressionResult.Region.BeginColumn;
+			this.fileContent = fileContent;
 			this.callingClass = parseInfo.BestCompilationUnit.GetInnermostClass(caretLine, caretColumn);
-			this.context = CompletionDataHelper.ResolveContext(fileContent, parseInfo.MostRecentCompilationUnit.FileName, caretLine, caretColumn);
-			if (context == null)
-				return null;
-			if (string.IsNullOrEmpty(context.AttributeName)) {
-				return ResolveElementName(expressionResult.Expression);
-			}
-			else if (context.Description == XamlContextDescription.InAttributeValue) {
-				MemberResolveResult mrr = ResolveAttribute(context.AttributeName);
-				if (mrr != null) {
-					return ResolveAttributeValue(mrr.ResolvedMember, resolveExpression);
-				}
-			}
-			else {
-				// in attribute name
-				return ResolveAttribute(resolveExpression);
+			this.context = expressionResult.Context as XamlContext ?? CompletionDataHelper.ResolveContext(fileContent, parseInfo.MostRecentCompilationUnit.FileName, caretLine, caretColumn);
+			
+			switch (this.context.Description) {
+				case XamlContextDescription.AtTag:
+					return ResolveElementName(resolveExpression);
+				case XamlContextDescription.InTag:
+					return ResolveAttribute(resolveExpression);
+				case XamlContextDescription.InAttributeValue:
+					MemberResolveResult mrr = ResolveAttribute(context.AttributeName);
+					if (mrr != null) {
+						return ResolveAttributeValue(mrr.ResolvedMember, resolveExpression) ?? mrr;
+					}
+					break;
+				case XamlContextDescription.InMarkupExtension:
+					return ResolveMarkupExtension(resolveExpression);
 			}
 			
 			return null;
 		}
+		
+		ResolveResult ResolveMarkupExtension(string expression)
+		{
+			if (context.AttributeValue.IsString)
+				return null;
+			
+			object data = Utils.GetMarkupDataAtPosition(context.AttributeValue.ExtensionValue, context.ValueStartOffset);
+			
+			// resolve markup extension type
+			if ((data as string) == expression) {
+				return ResolveElementName(expression + "Extension") ?? ResolveElementName(expression);
+			} else {
+				var value = data as AttributeValue;
+				if (value != null && value.IsString) {
+					return ResolveElementName(expression) ?? ResolveAttribute(expression);
+				}
+				
+				if (data is KeyValuePair<string, AttributeValue>) {
+					var pair = (KeyValuePair<string, AttributeValue>)data;
+					var member = ResolveAttribute(pair.Key);
+					if (pair.Value.StartOffset + pair.Key.Length >= context.ValueStartOffset) {
+						return member;
+					} else {
+						if (pair.Value.IsString && member != null)
+							return ResolveAttributeValue(member.ResolvedMember, expression);
+					}
+				}
+				
+				return null;
+			}
+		}
 
 		ResolveResult ResolveElementName(string exp)
 		{