Merge pull request #1700 from jcansdale/fixes/1692-fix-fork-View-on-GitHub

Fix `View on GitHub` when on fork repository

Author: jcansdale

src/GitHub.App/ViewModels/GitHubPane/PullRequestDetailViewModel.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Globalization;
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
 using System.IO;
@@ -328,7 +329,7 @@ public async Task InitializeAsync(
                 LocalRepository = localRepository;
                 RemoteRepositoryOwner = owner;
                 Number = number;
-                WebUrl = LocalRepository.CloneUrl.ToRepositoryUrl().Append("pull/" + number);
+                WebUrl = localRepository.CloneUrl.ToRepositoryUrl(owner).Append("pull/" + number);
                 modelService = await modelServiceFactory.CreateAsync(connection);
 
                 await Refresh();

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

@@ -41,15 +41,7 @@ public PullRequestDetailView()
         void DoOpenOnGitHub()
         {
             var browser = VisualStudioBrowser;
-            var cloneUrl = ViewModel.LocalRepository.CloneUrl;
-            var url = ToPullRequestUrl(cloneUrl.Host, ViewModel.RemoteRepositoryOwner, ViewModel.LocalRepository.Name, ViewModel.Model.Number);
-            browser.OpenUrl(url);
-        }
-
-        static Uri ToPullRequestUrl(string host, string owner, string repositoryName, int number)
-        {
-            var url = string.Format(CultureInfo.InvariantCulture, "https://{0}/{1}/{2}/pull/{3}", host, owner, repositoryName, number);
-            return new Uri(url);
+            browser.OpenUrl(ViewModel.WebUrl);
         }
 
         void OpenHyperlink(object sender, ExecutedRoutedEventArgs e)