Trigger navigation using command dispacher

Currently uses VSStd2KCmdID.RETURN command.

Author: jcansdale

src/GitHub.VisualStudio/GitHub.VisualStudio.csproj

@@ -391,6 +391,7 @@
     <Compile Include="Views\GitHubPane\NotAGitRepositoryView.xaml.cs">
       <DependentUpon>NotAGitRepositoryView.xaml</DependentUpon>
     </Compile>
+    <Compile Include="Views\GitHubPane\TextViewCommandDispatcher.cs" />
     <Compile Include="Views\TeamExplorer\RepositoryPublishView.xaml.cs">
       <DependentUpon>RepositoryPublishView.xaml</DependentUpon>
     </Compile>

src/GitHub.VisualStudio/Views/GitHubPane/PullRequestDetailView.xaml.cs

@@ -72,6 +72,9 @@ public PullRequestDetailView()
         [Import]
         INavigationService NavigationService { get; set; }
 
+        [Import]
+        IVsEditorAdaptersFactoryService EditorAdaptersFactoryService { get; set; }
+
         protected override void OnVisualParentChanged(DependencyObject oldParent)
         {
             base.OnVisualParentChanged(oldParent);
@@ -228,19 +231,11 @@ void AddBufferTag(ITextBuffer buffer, IPullRequestSession session, string path,
 
         void EnableNavigateToEditor(IWpfTextView textView, IPullRequestFileNode file)
         {
-            textView.VisualElement.PreviewKeyDown += async (s, e) =>
-            {
-                if (e.Key == Key.Space)
-                {
-                    await DoOpenLiveFile(file);
-                }
-                else
-                {
-                    Services.Dte.StatusBar.Text = "Press space bar to open file in solution";
-                }
-
-                e.Handled = true;
-            };
+            var view = EditorAdaptersFactoryService.GetViewAdapter(textView);
+            var commandGroup = VSConstants.CMDSETID.StandardCommandSet2K_guid;
+            var commandId = (int)VSConstants.VSStd2KCmdID.RETURN;
+            var dispatcher = new TextViewCommandDispatcher(view, commandGroup, commandId);
+            dispatcher.Exec += async (s, e) => await DoOpenLiveFile(file);
         }
 
         void ShowErrorInStatusBar(string message, Exception e = null)

src/GitHub.VisualStudio/Views/GitHubPane/TextViewCommandDispatcher.cs

@@ -0,0 +1,47 @@
+using System;
+using Microsoft.VisualStudio;
+using Microsoft.VisualStudio.OLE.Interop;
+using Microsoft.VisualStudio.TextManager.Interop;
+
+namespace GitHub.VisualStudio.Views.GitHubPane
+{
+    class TextViewCommandDispatcher : IOleCommandTarget, IDisposable
+    {
+        readonly IVsTextView textView;
+        readonly Guid commandGroup;
+        readonly int commandId;
+        readonly IOleCommandTarget next;
+
+        public TextViewCommandDispatcher(IVsTextView textView, Guid commandGroup, int commandId)
+        {
+            this.textView = textView;
+            this.commandGroup = commandGroup;
+            this.commandId = commandId;
+
+            ErrorHandler.ThrowOnFailure(textView.AddCommandFilter(this, out next));
+        }
+
+        public void Dispose()
+        {
+            ErrorHandler.ThrowOnFailure(textView.RemoveCommandFilter(this));
+        }
+
+        int IOleCommandTarget.Exec(ref Guid pguidCmdGroup, uint nCmdID, uint nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
+        {
+            if (pguidCmdGroup == commandGroup && nCmdID == commandId)
+            {
+                Exec?.Invoke(this, EventArgs.Empty);
+                return 0;
+            }
+
+            return next?.Exec(ref pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut) ?? 0;
+        }
+
+        int IOleCommandTarget.QueryStatus(ref Guid pguidCmdGroup, uint cCmds, OLECMD[] prgCmds, IntPtr pCmdText)
+        {
+            return next?.QueryStatus(ref pguidCmdGroup, cCmds, prgCmds, pCmdText) ?? 0;
+        }
+
+        public event EventHandler Exec;
+    }
+}