The method insight window can be invoked by pressing the "Control|Shift|Space" combination.

Cherry-picked from pull request #728

Author: nik

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Completion/RazorCSharpCompletionBinding.cs

@@ -48,6 +48,11 @@ public bool CtrlSpace(ITextEditor editor)
 			return false;
 		}
 
+		public bool CtrlShiftSpace(ITextEditor editor)
+		{
+			return false;
+		}
+
 		public CodeCompletionKeyPressResult HandleKeyPress(ITextEditor editor, char ch)
 		{
 			// We use HandleKeyPressed instead.

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

@@ -70,26 +70,43 @@ public bool CtrlSpace(ITextEditor editor)
 		{
 			return ShowCompletion(editor, '\0', true);
 		}
-		
-		bool ShowCompletion(ITextEditor editor, char completionChar, bool ctrlSpace)
+
+		public bool CtrlShiftSpace(ITextEditor editor)
+		{
+			return ShowInsight(editor);
+		}
+
+		private int GetCaretOffset(ITextEditor editor, CSharpCompletionContext completionContext)
+		{
+			int caretOffset;
+			if (fileContent == null) {
+				caretOffset = editor.Caret.Offset;
+				currentLocation = editor.Caret.Location;
+			} else {
+				caretOffset = completionContext.Document.GetOffset(currentLocation);
+			}
+			return caretOffset;
+		}
+
+		CSharpCompletionContext GetCompletionContext(ITextEditor editor)
 		{
 			CSharpCompletionContext completionContext;
 			if (fileContent == null) {
 				completionContext = CSharpCompletionContext.Get(editor);
 			} else {
 				completionContext = CSharpCompletionContext.Get(editor, context, currentLocation, fileContent);
 			}
+			return completionContext;
+		}
+		
+		bool ShowCompletion(ITextEditor editor, char completionChar, bool ctrlSpace)
+		{
+			var completionContext = GetCompletionContext(editor);
 			if (completionContext == null)
 				return false;
-			
-			int caretOffset;
-			if (fileContent == null) {
-				caretOffset = editor.Caret.Offset;
-				currentLocation = editor.Caret.Location;
-			} else {
-				caretOffset = completionContext.Document.GetOffset(currentLocation);
-			}
-			
+
+			int caretOffset = GetCaretOffset(editor, completionContext);
+
 			var completionFactory = new CSharpCompletionDataFactory(completionContext, new CSharpResolver(completionContext.TypeResolveContextAtCaret));
 
 			CSharpCompletionEngine cce = new CSharpCompletionEngine(
@@ -139,7 +156,36 @@ bool ShowCompletion(ITextEditor editor, char completionChar, bool ctrlSpace)
 				return true;
 			}
 
-			if (CodeCompletionOptions.InsightEnabled && !ctrlSpace) {
+			if (!ctrlSpace) {
+				// Method Insight
+				// Method Insight
+				return ShowInsight(caretOffset, completionContext, completionFactory, completionChar);
+			}
+			return false;
+		}
+
+		bool ShowInsight(ITextEditor editor)
+		{
+			var completionContext = GetCompletionContext(editor);
+			if (completionContext == null)
+				return false;
+
+			int caretOffset = GetCaretOffset(editor, completionContext);
+
+			var completionFactory = new CSharpCompletionDataFactory(
+				completionContext,
+				new CSharpResolver(completionContext.TypeResolveContextAtCaret));
+
+			return ShowInsight(caretOffset, completionContext, completionFactory, '(');
+		}
+
+		bool ShowInsight(
+			int caretOffset,
+			CSharpCompletionContext completionContext,
+			CSharpCompletionDataFactory completionFactory,
+			char completionChar)
+		{
+			if (CodeCompletionOptions.InsightEnabled) {
 				// Method Insight
 				var pce = new CSharpParameterCompletionEngine(
 					completionContext.Document,

src/AddIns/BackendBindings/XamlBinding/XamlBinding/XamlCodeCompletionBinding.cs

@@ -244,6 +244,11 @@ bool CtrlSpace(ITextEditor editor, XamlCompletionContext context)
 			return false;
 		}
 
+		public bool CtrlShiftSpace(ITextEditor editor)
+		{
+			return false;
+		}
+
 		void DoTriggerCompletion(XamlCompletionContext context, XamlCompletionItemList completionList)
 		{
 			bool isExplicit;

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/CodeEditor.cs

@@ -229,6 +229,8 @@ protected virtual CodeEditorView CreateTextEditor()
 			codeEditorView.TextArea.SelectionChanged += TextAreaSelectionChanged;
 			codeEditorView.TextArea.DefaultInputHandler.CommandBindings.Add(
 				new CommandBinding(CustomCommands.CtrlSpaceCompletion, OnCodeCompletion));
+			codeEditorView.TextArea.DefaultInputHandler.CommandBindings.Add(
+				new CommandBinding(CustomCommands.CtrlShiftSpaceInsight, OnCodeInsight));
 			SearchPanel.Install(codeEditorView.TextArea);
 
 			textView.BackgroundRenderers.Add(textMarkerService);
@@ -618,6 +620,24 @@ void OnCodeCompletion(object sender, ExecutedRoutedEventArgs e)
 				}
 			}
 		}
+
+		void OnCodeInsight(object sender, ExecutedRoutedEventArgs e)
+		{
+			if (InsightWindow != null)
+				InsightWindow.Close();
+
+			// disable all code insight bindings when Insight is disabled
+			if (!CodeCompletionOptions.InsightEnabled)
+				return;
+
+			CodeEditorView textEditor = GetTextEditorFromSender(sender);
+			foreach (ICodeCompletionBinding cc in CodeCompletionBindings) {
+				if (cc.CtrlShiftSpace(textEditor.Adapter)) {
+					e.Handled = true;
+					break;
+				}
+			}
+		}
 
 		void FetchParseInformation()
 		{

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/CustomCommands.cs

@@ -31,5 +31,11 @@ public static class CustomCommands
 			new InputGestureCollection {
 				new KeyGesture(Key.Space, ModifierKeys.Control)
 			});
+
+		public static readonly RoutedCommand CtrlShiftSpaceInsight = new RoutedCommand(
+			"CtrlShiftSpaceInsight", typeof(CodeEditor),
+			new InputGestureCollection {
+				new KeyGesture(Key.Space, ModifierKeys.Control | ModifierKeys.Shift)
+			});
 	}
 }

src/AddIns/DisplayBindings/XmlEditor/Project/Src/XmlCodeCompletionBinding.cs

@@ -98,6 +98,11 @@ public bool CtrlSpace(ITextEditor editor)
 			}
 			return false;
 		}
+
+		public bool CtrlShiftSpace(ITextEditor editor)
+		{
+			return false;
+		}
 
 		bool ElementStartsWith(string text, int elementStartIndex, ITextSource document)
 		{

src/Main/Base/Project/Editor/CodeCompletion/CodeCompletionBinding.cs

@@ -51,6 +51,12 @@ public interface ICodeCompletionBinding
 		/// </summary>
 		/// <returns>Returns whether the completion binding has shown code completion.</returns>
 		bool CtrlSpace(ITextEditor editor);
+
+		/// <summary>
+		/// Invokes ctrl-shift-space code insight.
+		/// </summary>
+		/// <returns>Returns whether the completion binding has shown code insight.</returns>
+		bool CtrlShiftSpace(ITextEditor editor);
 	}
 
 	/// <summary>
@@ -165,5 +171,13 @@ public bool CtrlSpace(ITextEditor editor)
 			else
 				return false;
 		}
+
+		public bool CtrlShiftSpace(ITextEditor editor)
+		{
+			if (MatchesExtension(editor))
+				return binding.CtrlShiftSpace(editor);
+			else
+				return false;
+		}
 	}
 }