From 96873d1f62934967cc15e4c601704978ab1ed0aa Mon Sep 17 00:00:00 2001
From: Aaron Bockover <abock@microsoft.com>
Date: Wed, 2 Oct 2019 10:13:21 -0400
Subject: Sync with vs-editor-core@4624fd16

---
 src/Editor/Text/Def/TextUICocoa/Input/KeyEvent.cs  | 34 ++++++++++++++++++++++
 .../Text/Def/TextUICocoa/Input/KeyProcessor.cs     | 33 ++++++++++++++-------
 2 files changed, 56 insertions(+), 11 deletions(-)
 create mode 100644 src/Editor/Text/Def/TextUICocoa/Input/KeyEvent.cs

diff --git a/src/Editor/Text/Def/TextUICocoa/Input/KeyEvent.cs b/src/Editor/Text/Def/TextUICocoa/Input/KeyEvent.cs
new file mode 100644
index 0000000..eab7599
--- /dev/null
+++ b/src/Editor/Text/Def/TextUICocoa/Input/KeyEvent.cs
@@ -0,0 +1,34 @@
+//
+//  Copyright (c) Microsoft Corporation. All rights reserved.
+//  Licensed under the MIT License. See License.txt in the project root for license information.
+//
+
+using System;
+using AppKit;
+
+namespace Microsoft.VisualStudio.Text.Editor
+{
+    /// <summary>
+    /// A native <see cref="NSEvent"/> key input event that allows for indicating that
+    /// the event has been handled. This event will wrap <see cref="NSEventType.KeyUp"/>,
+    /// <see cref="NSEventType.KeyDown"/>, and  <see cref="NSEventType.FlagsChanged"/>
+    /// events. 
+    /// </summary>
+    public sealed class KeyEvent : InputEvent
+    {
+        internal KeyEvent(NSEvent @event) : base(@event)
+        {
+            switch (@event.Type)
+            {
+                case NSEventType.KeyUp:
+                case NSEventType.KeyDown:
+                case NSEventType.FlagsChanged:
+                    break;
+                default:
+                    throw new ArgumentException(
+                        "event type must be KeyUp, KeyDown, or FlagsChanged",
+                        nameof(@event));
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Editor/Text/Def/TextUICocoa/Input/KeyProcessor.cs b/src/Editor/Text/Def/TextUICocoa/Input/KeyProcessor.cs
index 5824b13..c45269f 100644
--- a/src/Editor/Text/Def/TextUICocoa/Input/KeyProcessor.cs
+++ b/src/Editor/Text/Def/TextUICocoa/Input/KeyProcessor.cs
@@ -2,10 +2,9 @@
 //  Copyright (c) Microsoft Corporation. All rights reserved.
 //  Licensed under the MIT License. See License.txt in the project root for license information.
 //
+
 namespace Microsoft.VisualStudio.Text.Editor
 {
-    using AppKit;
-
     /// <summary>
     /// Processes the keyboard input of the editor.
     /// </summary>
@@ -14,28 +13,40 @@ namespace Microsoft.VisualStudio.Text.Editor
     /// </remarks>
     public abstract class KeyProcessor
     {
+        /// <summary>
+        /// Determines whether this processor should be called for events that have
+        /// been handled by earlier <see cref="KeyProcessor"/> objects.
+        /// </summary>
+        public virtual bool IsInterestedInHandledEvents => false;
+
         /// <summary>
         /// Handles the KeyDown event.
         /// </summary>
-        /// <param name="theEvent">
-        /// A <see cref="NSEvent"/> describing the key event.
+        /// <param name="e">
+        /// Event arguments that describe the event.
         /// </param>
-        public virtual void KeyDown(NSEvent theEvent) { }
+        public virtual void KeyDown(KeyEvent e)
+        {
+        }
 
         /// <summary>
         /// Handles the KeyUp event.
         /// </summary>
-        /// <param name="theEvent">
-        /// A <see cref="NSEvent"/> describing the key event.
+        /// <param name="e">
+        /// Event arguments that describe the event.
         /// </param>
-        public virtual void KeyUp(NSEvent theEvent) { }
+        public virtual void KeyUp(KeyEvent e)
+        {
+        }
 
         /// <summary>
         /// Handles the FlagsChanged event.
         /// </summary>
-        /// <param name="theEvent">
-        /// A <see cref="FlagsChanged"/> describing the key event.
+        /// <param name="e">
+        /// Event arguments that describe the event.
         /// </param>
-        public virtual void FlagsChanged(NSEvent theEvent) { }
+        public virtual void FlagsChanged(KeyEvent e)
+        {
+        }
     }
 }
-- 
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