MonoDevelop.CSharp.SignatureMarkupCreator.GetConstraintTooltip C# (CSharp) Méthode

		public TooltipInformation GetConstraintTooltip (SyntaxToken keyword)
		{
			var result = new TooltipInformation ();

			var color = AlphaBlend (colorStyle.PlainText.Foreground, colorStyle.PlainText.Background, optionalAlpha);
			var colorString = MonoDevelop.Components.HelperMethods.GetColorString (color);

			var keywordSign = "<span foreground=\"" + colorString + "\">" + " (keyword)</span>";

			result.SignatureMarkup = Highlight (keyword.ToFullString (), colorStyle.KeywordTypes) + keywordSign;

			switch (keyword.Parent.Kind ()) {
			case SyntaxKind.ClassConstraint:
				result.AddCategory ("Constraint", "The type argument must be a reference type; this applies also to any class, interface, delegate, or array type.");
				break;
			case SyntaxKind.ConstructorConstraint:
				result.AddCategory ("Constraint", "The type argument must have a public parameterless constructor. When used together with other constraints, the new() constraint must be specified last.");
				break;
			case SyntaxKind.StructConstraint:
				result.AddCategory ("Constraint", "The type argument must be a value type. Any value type except Nullable can be specified. See Using Nullable Types (C# Programming Guide) for more information.");
				break;
			}

			return result;
		}

		TooltipInformation CreateTooltip (ToolTipData data, int offset, Ambience ambience)
		{
			ResolveResult result = data.Result;
			var doc = IdeApp.Workbench.ActiveDocument;
			if (doc == null)
				return null;
			try {

				if (result is AliasNamespaceResolveResult) {
					var resolver = (doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile).GetResolver (doc.Compilation, doc.Editor.Caret.Location);
					var sig = new SignatureMarkupCreator (resolver, doc.GetFormattingPolicy ().CreateOptions ());
					sig.BreakLineAfterReturnType = false;
					return sig.GetAliasedNamespaceTooltip ((AliasNamespaceResolveResult)result);
				}
				
				if (result is AliasTypeResolveResult) {
					var resolver = (doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile).GetResolver (doc.Compilation, doc.Editor.Caret.Location);
					var sig = new SignatureMarkupCreator (resolver, doc.GetFormattingPolicy ().CreateOptions ());
					sig.BreakLineAfterReturnType = false;
					return sig.GetAliasedTypeTooltip ((AliasTypeResolveResult)result);
				}
				
				if (data.Node is TypeOfExpression) {
					var resolver = (doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile).GetResolver (doc.Compilation, doc.Editor.Caret.Location);
					var sig = new SignatureMarkupCreator (resolver, doc.GetFormattingPolicy ().CreateOptions ());
					sig.BreakLineAfterReturnType = false;
					return sig.GetTypeOfTooltip ((TypeOfExpression)data.Node, result as TypeOfResolveResult);
				}
				if (data.Node is PrimitiveType && data.Node.Parent is Constraint) {
					var t = (PrimitiveType)data.Node;
					if (t.Keyword == "class" || t.Keyword == "new" || t.Keyword == "struct") {
						var resolver = (doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile).GetResolver (doc.Compilation, doc.Editor.Caret.Location);
						var sig = new SignatureMarkupCreator (resolver, doc.GetFormattingPolicy ().CreateOptions ());
						sig.BreakLineAfterReturnType = false;
						return sig.GetConstraintTooltip (t.Keyword);
					}
					return null;
				}
				if (data.Node is ExternAliasDeclaration) {
					var resolver = (doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile).GetResolver (doc.Compilation, doc.Editor.Caret.Location);
					var sig = new SignatureMarkupCreator (resolver, doc.GetFormattingPolicy ().CreateOptions ());
					sig.BreakLineAfterReturnType = false;
					return sig.GetExternAliasTooltip ((ExternAliasDeclaration)data.Node, doc.Project as DotNetProject);
				}
				if (result == null && data.Node is CSharpTokenNode) {
					var resolver = (doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile).GetResolver (doc.Compilation, doc.Editor.Caret.Location);
					var sig = new SignatureMarkupCreator (resolver, doc.GetFormattingPolicy ().CreateOptions ());
					sig.BreakLineAfterReturnType = false;
					return sig.GetKeywordTooltip (data.Node);
				}
				if (data.Node is PrimitiveType && ((PrimitiveType)data.Node).KnownTypeCode == KnownTypeCode.Void) {
					var resolver = (doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile).GetResolver (doc.Compilation, doc.Editor.Caret.Location);
					var sig = new SignatureMarkupCreator (resolver, doc.GetFormattingPolicy ().CreateOptions ());
					sig.BreakLineAfterReturnType = false;
					return sig.GetKeywordTooltip ("void", null);
				}

				if (result is UnknownIdentifierResolveResult) {
					return new TooltipInformation () {
						SignatureMarkup = string.Format ("error CS0103: The name `{0}' does not exist in the current context", ((UnknownIdentifierResolveResult)result).Identifier)
					};
				} else if (result is UnknownMemberResolveResult) {
					var ur = (UnknownMemberResolveResult)result;
					if (ur.TargetType.Kind != TypeKind.Unknown) {
						return new TooltipInformation () {
							SignatureMarkup = string.Format ("error CS0117: `{0}' does not contain a definition for `{1}'", ur.TargetType.FullName, ur.MemberName)
						};
					}
				} else if (result.IsError) {
					return new TooltipInformation () {
						SignatureMarkup = "Unknown resolve error."
					};
				}
				if (result is LocalResolveResult) {
					var lr = (LocalResolveResult)result;
					var tooltipInfo = new TooltipInformation ();
					var resolver = (doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile).GetResolver (doc.Compilation, doc.Editor.Caret.Location);
					var sig = new SignatureMarkupCreator (resolver, doc.GetFormattingPolicy ().CreateOptions ());
					sig.BreakLineAfterReturnType = false;
					tooltipInfo.SignatureMarkup = sig.GetLocalVariableMarkup (lr.Variable);
					return tooltipInfo;
				} else if (result is MethodGroupResolveResult) {
					var mrr = (MethodGroupResolveResult)result;
					var allMethods = new List<IMethod> (mrr.Methods);
					foreach (var l in mrr.GetExtensionMethods ()) {
						allMethods.AddRange (l);
					}
				
					var method = allMethods.FirstOrDefault ();
					if (method != null) {
						return MemberCompletionData.CreateTooltipInformation (
						doc.Compilation,
						doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile,
						doc.Editor,
						doc.GetFormattingPolicy (),
						method, 
						false);
					}
				} else if (result is CSharpInvocationResolveResult) {
					var member = ((CSharpInvocationResolveResult)result).ReducedMethod ?? (IMethod)((CSharpInvocationResolveResult)result).Member;
					return MemberCompletionData.CreateTooltipInformation (
						doc.Compilation,
						doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile,
						doc.Editor,
						doc.GetFormattingPolicy (),
						member, 
						false);
				} else if (result is MemberResolveResult) {
					var member = ((MemberResolveResult)result).Member;
					return MemberCompletionData.CreateTooltipInformation (
					doc.Compilation,
					doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile,
					doc.Editor,
					doc.GetFormattingPolicy (),
					member, 
					false);
				}else if (result is NamespaceResolveResult) {
					var tooltipInfo = new TooltipInformation ();
					var resolver = (doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile).GetResolver (doc.Compilation, doc.Editor.Caret.Location);
					var sig = new SignatureMarkupCreator (resolver, doc.GetFormattingPolicy ().CreateOptions ());
					sig.BreakLineAfterReturnType = false;
					try {
						tooltipInfo.SignatureMarkup = sig.GetMarkup (((NamespaceResolveResult)result).Namespace);
					} catch (Exception e) {
						LoggingService.LogError ("Got exception while creating markup for :" + ((NamespaceResolveResult)result).Namespace, e);
						return new TooltipInformation ();
					}
					return tooltipInfo;
				} else {
					return MemberCompletionData.CreateTooltipInformation (
					doc.Compilation,
					doc.ParsedDocument.ParsedFile as CSharpUnresolvedFile,
					doc.Editor,
					doc.GetFormattingPolicy (),
					result.Type, 
					false);
				}
			} catch (Exception e) {
				LoggingService.LogError ("Error while creating tooltip.", e);
				return null;
			}
		
			return null;
		}