Dynamically enable changes link

Author: jcansdale

src/GitHub.App/ViewModels/PullRequestDetailViewModel.cs

@@ -452,8 +452,9 @@ public async Task Load(string remoteRepositoryOwner, IPullRequestModel pullReque
                     }
 
                     var syncSubmodulesEnabled = await pullRequestsService.IsSyncSubmodulesRequired(LocalRepository);
+                    var changesEnabled = !await pullRequestsService.IsWorkingDirectoryClean(LocalRepository);
 
-                    UpdateState = new UpdateCommandState(divergence, pullEnabled, pushEnabled, pullToolTip, pushToolTip, syncSubmodulesEnabled);
+                    UpdateState = new UpdateCommandState(divergence, pullEnabled, pushEnabled, pullToolTip, pushToolTip, syncSubmodulesEnabled, changesEnabled);
                     CheckoutState = null;
                 }
                 else
@@ -687,7 +688,8 @@ public UpdateCommandState(
                 bool pushEnabled,
                 string pullToolTip,
                 string pushToolTip,
-                bool syncSubmodulesEnabled)
+                bool syncSubmodulesEnabled,
+                bool changesEnabled)
             {
                 CommitsAhead = divergence.AheadBy ?? 0;
                 CommitsBehind = divergence.BehindBy ?? 0;
@@ -696,6 +698,7 @@ public UpdateCommandState(
                 PullToolTip = pullToolTip;
                 PushToolTip = pushToolTip;
                 SyncSubmodulesEnabled = syncSubmodulesEnabled;
+                ChangesEnabled = changesEnabled;
             }
 
             public int CommitsAhead { get; }
@@ -704,6 +707,7 @@ public UpdateCommandState(
             public bool PullEnabled { get; }
             public bool PushEnabled { get; }
             public bool SyncSubmodulesEnabled { get; }
+            public bool ChangesEnabled { get; }
             public string PullToolTip { get; }
             public string PushToolTip { get; }
         }

src/GitHub.VisualStudio/UI/Views/PullRequestDetailView.xaml

@@ -189,12 +189,16 @@
                                              VerticalAlignment="Center"/>
 
                         <!-- Navigate to Git changes -->
-                        <ui:GitHubActionLink Command="{Binding NavigateToGitChanges}" Content="[GitChanges]" Margin="4 0" />
+                        <ui:GitHubActionLink
+                            Command="{Binding NavigateToGitChanges}"
+                            Content="[GitChanges]" Margin="4 0"
+                            Visibility="{Binding UpdateState.ChangesEnabled, FallbackValue=Collapsed, Converter={ui:BooleanToVisibilityConverter}}" />
 
                         <!-- Sync submodules -->
                         <ui:GitHubActionLink Command="{Binding SyncSubmodules}"
                             Content="[SyncSubmodules]" Margin="4 0"
                             Visibility="{Binding UpdateState.SyncSubmodulesEnabled, FallbackValue=Collapsed, Converter={ui:BooleanToVisibilityConverter}}" />
+
                     </StackPanel>
 
                     <!-- Branch checked out and up-to-date -->