1 files changed, 296 insertions, 0 deletions
diff --git a/main/src/addins/CSharpBinding/MonoDevelop.CSharp.Completion/RoslynParameterHintingFactory.cs b/main/src/addins/CSharpBinding/MonoDevelop.CSharp.Completion/RoslynParameterHintingFactory.cs
new file mode 100644
index 0000000000..2982e02d66
--- /dev/null
+++ b/main/src/addins/CSharpBinding/MonoDevelop.CSharp.Completion/RoslynParameterHintingFactory.cs
@@ -0,0 +1,296 @@
+//
+// RoslynParameterHintingFactory.cs
+//
+// Author:
+//       Mike Krüger <mkrueger@xamarin.com>
+//
+// Copyright (c) 2014 Xamarin Inc. (http://xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+using ICSharpCode.NRefactory6.CSharp.Completion;
+using Microsoft.CodeAnalysis;
+using System.Collections.Immutable;
+using ICSharpCode.NRefactory6.CSharp;
+using System.Linq;
+using MonoDevelop.Ide.CodeCompletion;
+using MonoDevelop.Core;
+using MonoDevelop.Ide.TypeSystem;
+using System.Text.RegularExpressions;
+
+namespace MonoDevelop.CSharp.Completion
+{
+	class RoslynParameterHintingFactory : IParameterHintingDataFactory
+	{
+		#region IParameterHintingDataFactory implementation
+
+		IParameterHintingData IParameterHintingDataFactory.CreateConstructorProvider (Microsoft.CodeAnalysis.IMethodSymbol constructor)
+		{
+			return new ParameterHintingData (constructor);
+		}
+
+		IParameterHintingData IParameterHintingDataFactory.CreateMethodDataProvider (Microsoft.CodeAnalysis.IMethodSymbol method)
+		{
+			return new ParameterHintingData (method);
+		}
+
+		IParameterHintingData IParameterHintingDataFactory.CreateDelegateDataProvider (Microsoft.CodeAnalysis.ITypeSymbol delegateType)
+		{
+			return new DelegateParameterHintingData (delegateType);
+		}
+
+		IParameterHintingData IParameterHintingDataFactory.CreateIndexerParameterDataProvider (Microsoft.CodeAnalysis.IPropertySymbol indexer, Microsoft.CodeAnalysis.SyntaxNode resolvedNode)
+		{
+			return new ParameterHintingData (indexer);
+		}
+
+		IParameterHintingData IParameterHintingDataFactory.CreateTypeParameterDataProvider (Microsoft.CodeAnalysis.INamedTypeSymbol type)
+		{
+			return new TypeParameterHintingData (type);
+		}
+
+		IParameterHintingData IParameterHintingDataFactory.CreateTypeParameterDataProvider (Microsoft.CodeAnalysis.IMethodSymbol method)
+		{
+			return new TypeParameterHintingData (method);
+		}
+
+		IParameterHintingData IParameterHintingDataFactory.CreateArrayDataProvider (Microsoft.CodeAnalysis.IArrayTypeSymbol arrayType)
+		{
+			return new ArrayParameterHintingData (arrayType);
+		}
+
+		#endregion
+
+		class ParameterHintingData : MonoDevelop.Ide.CodeCompletion.ParameterHintingData, IParameterHintingData
+		{
+			public ParameterHintingData (IMethodSymbol symbol) : base (symbol)
+			{
+			}
+
+			public ParameterHintingData (IPropertySymbol symbol) : base (symbol)
+			{
+			}
+			public override TooltipInformation CreateTooltipInformation (MonoDevelop.Ide.Editor.TextEditor editor, MonoDevelop.Ide.Editor.DocumentContext ctx, int currentParameter, bool smartWrap)
+			{
+				return CreateTooltipInformation (editor, ctx, Symbol, currentParameter, smartWrap);
+			}
+			
+			internal static TooltipInformation CreateTooltipInformation (MonoDevelop.Ide.Editor.TextEditor editor, MonoDevelop.Ide.Editor.DocumentContext ctx, ISymbol sym, int currentParameter, bool smartWrap)
+			{
+				var tooltipInfo = new TooltipInformation ();
+				var sig = new SignatureMarkupCreator (ctx, editor != null ? editor.CaretOffset : 0);
+				sig.HighlightParameter = currentParameter;
+				sig.BreakLineAfterReturnType = smartWrap;
+				try {
+					tooltipInfo.SignatureMarkup = sig.GetMarkup (sym);
+				} catch (Exception e) {
+					LoggingService.LogError ("Got exception while creating markup for :" + sym, e);
+					return new TooltipInformation ();
+				}
+				tooltipInfo.SummaryMarkup = Ambience.GetSummaryMarkup (sym) ?? "";
+
+				if (sym is IMethodSymbol) {
+					var method = (IMethodSymbol)sym;
+					if (method.IsExtensionMethod && method.ReducedFrom != null && method.ReducedFrom.ContainingType != null) {
+						tooltipInfo.AddCategory (GettextCatalog.GetString ("Extension Method from"), method.ReducedFrom.ContainingType.Name);
+					}
+				}
+				int paramIndex = currentParameter;
+
+//				if (Symbol is IMethodSymbol && ((IMethodSymbol)Symbol).IsExtensionMethod)
+//					paramIndex++;
+				var list = GetParameterList (sym);
+				paramIndex = Math.Min (list.Length - 1, paramIndex);
+				
+				var curParameter = paramIndex >= 0  && paramIndex < list.Length ? list [paramIndex] : null;
+				if (curParameter != null) {
+
+					string docText = Ambience.GetDocumentation (sym);
+					if (!string.IsNullOrEmpty (docText)) {
+						string text = docText;
+						Regex paramRegex = new Regex ("(\\<param\\s+name\\s*=\\s*\"" + curParameter.Name + "\"\\s*\\>.*?\\</param\\>)", RegexOptions.Compiled);
+						Match match = paramRegex.Match (docText);
+						
+						if (match.Success) {
+							text = Ambience.GetDocumentationMarkup (sym, match.Groups [1].Value);
+							if (!string.IsNullOrWhiteSpace (text))
+								tooltipInfo.AddCategory (GettextCatalog.GetString ("Parameter"), text);
+						}
+					}
+					if (curParameter.Type.TypeKind == TypeKind.Delegate)
+						tooltipInfo.AddCategory (GettextCatalog.GetString ("Delegate Info"), sig.GetDelegateInfo (curParameter.Type));
+				}
+				return tooltipInfo;
+			}
+
+			static ImmutableArray<IParameterSymbol> GetParameterList (ISymbol data)
+			{
+				var ms = data as IMethodSymbol;
+				if (ms != null)
+					return ms.Parameters;
+				
+				var ps = data as IPropertySymbol;
+				if (ps != null)
+					return ps.Parameters;
+
+				return ImmutableArray<IParameterSymbol>.Empty;
+			}
+
+			public override string GetParameterName (int currentParameter)
+			{
+				var list = GetParameterList (Symbol);
+				if (currentParameter < 0 || currentParameter >= list.Length)
+					throw new ArgumentOutOfRangeException ("currentParameter");
+				return list [currentParameter].Name;
+			}
+
+			public override int ParameterCount {
+				get {
+					return GetParameterList (Symbol).Length;
+				}
+			}
+
+			public override bool IsParameterListAllowed {
+				get {
+					var param = GetParameterList (Symbol).LastOrDefault ();
+					return param != null && param.IsParams;
+				}
+			}
+		}
+
+		class DelegateParameterHintingData : MonoDevelop.Ide.CodeCompletion.ParameterHintingData, IParameterHintingData
+		{
+			readonly IMethodSymbol invocationMethod;
+
+			public DelegateParameterHintingData (ITypeSymbol symbol) : base (symbol)
+			{
+				this.invocationMethod = symbol.GetDelegateInvokeMethod ();
+			}
+
+			public override string GetParameterName (int currentParameter)
+			{
+				var list = invocationMethod.Parameters;
+				if (currentParameter < 0 || currentParameter >= list.Length)
+					throw new ArgumentOutOfRangeException ("currentParameter");
+				return list [currentParameter].Name;
+			}
+
+			public override int ParameterCount {
+				get {
+					return invocationMethod.Parameters.Length;
+				}
+			}
+
+			public override bool IsParameterListAllowed {
+				get {
+					var param = invocationMethod.Parameters.LastOrDefault ();
+					return param != null && param.IsParams;
+				}
+			}
+			public override TooltipInformation CreateTooltipInformation (MonoDevelop.Ide.Editor.TextEditor editor, MonoDevelop.Ide.Editor.DocumentContext ctx, int currentParameter, bool smartWrap)
+			{
+				return ParameterHintingData.CreateTooltipInformation (editor, ctx, invocationMethod, currentParameter, smartWrap);
+			}
+
+		}
+
+		class ArrayParameterHintingData : MonoDevelop.Ide.CodeCompletion.ParameterHintingData, IParameterHintingData
+		{
+			readonly IArrayTypeSymbol arrayType;
+
+			public ArrayParameterHintingData (IArrayTypeSymbol arrayType) : base (arrayType)
+			{
+				this.arrayType = arrayType;
+			}
+
+			public override string GetParameterName (int currentParameter)
+			{
+				return null;
+			}
+
+			public override int ParameterCount {
+				get {
+					return arrayType.Rank;
+				}
+			}
+
+			public override bool IsParameterListAllowed {
+				get {
+					return false;
+				}
+			}
+			
+			public override TooltipInformation CreateTooltipInformation (MonoDevelop.Ide.Editor.TextEditor editor, MonoDevelop.Ide.Editor.DocumentContext ctx, int currentParameter, bool smartWrap)
+			{
+				var sig = new SignatureMarkupCreator (ctx, editor != null ? editor.CaretOffset : 0) {
+					HighlightParameter = currentParameter
+				};
+				return new TooltipInformation {
+					SignatureMarkup = sig.GetArrayIndexerMarkup (arrayType)
+				};
+			}
+			
+		}
+
+		class TypeParameterHintingData : MonoDevelop.Ide.CodeCompletion.ParameterHintingData, IParameterHintingData
+		{
+			public TypeParameterHintingData (IMethodSymbol symbol) : base (symbol)
+			{
+			}
+
+			public TypeParameterHintingData (INamedTypeSymbol symbol) : base (symbol)
+			{
+			}
+
+			static ImmutableArray<ITypeParameterSymbol> GetTypeParameterList (IParameterHintingData data)
+			{
+				var ms = data.Symbol as IMethodSymbol;
+				if (ms != null)
+					return ms.TypeParameters;
+				
+				var ps = data.Symbol as INamedTypeSymbol;
+				if (ps != null)
+					return ps.TypeParameters;
+
+				return ImmutableArray<ITypeParameterSymbol>.Empty;
+			}
+
+			public override string GetParameterName (int currentParameter)
+			{
+				var list = GetTypeParameterList (this);
+				if (currentParameter < 0 || currentParameter >= list.Length)
+					throw new ArgumentOutOfRangeException ("currentParameter");
+				return list [currentParameter].Name;
+			}
+
+			public override int ParameterCount {
+				get {
+					return GetTypeParameterList (this).Length;
+				}
+			}
+
+			public override bool IsParameterListAllowed {
+				get {
+					return false;
+				}
+			}
+		}
+	}
+}
+