refactor(*): re-arrange project

src/UI/Fetch.xaml.cs

@@ -0,0 +1,76 @@
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace SourceGit.UI {
+
+    /// <summary>
+    ///     Fetch dialog.
+    /// </summary>
+    public partial class Fetch : UserControl {
+        private Git.Repository repo = null;
+
+        /// <summary>
+        ///     Constructor.    
+        /// </summary>
+        /// <param name="opened">Opened repository</param>
+        /// <param name="preferRemote">Prefer selected remote.</param>
+        public Fetch(Git.Repository opened, string preferRemote) {
+            repo = opened;
+            InitializeComponent();
+
+            Task.Run(() => {
+                var remotes = repo.Remotes();
+                Dispatcher.Invoke(() => {
+                    combRemotes.ItemsSource = remotes;
+                    if (preferRemote != null) {
+                        combRemotes.SelectedIndex = remotes.FindIndex(r => r.Name == preferRemote);
+                        chkFetchAll.IsChecked = false;
+                    } else {
+                        combRemotes.SelectedIndex = 0;
+                        chkFetchAll.IsChecked = true;
+                    }
+                });
+            });
+        }
+
+        /// <summary>
+        ///     Show fetch dialog.
+        /// </summary>
+        /// <param name="repo"></param>
+        /// <param name="preferRemote"></param>
+        public static void Show(Git.Repository repo, string preferRemote = null) {
+            repo.GetPopupManager()?.Show(new Fetch(repo, preferRemote));
+        }
+
+        /// <summary>
+        ///     Start fetch
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private async void Start(object sender, RoutedEventArgs e) {
+            bool prune = chkPrune.IsChecked == true;
+
+            var popup = repo.GetPopupManager();
+            popup?.Lock();
+
+            if (chkFetchAll.IsChecked == true) {
+                await Task.Run(() => repo.Fetch(null, prune, msg => popup?.UpdateStatus(msg)));
+            } else {
+                var remote = combRemotes.SelectedItem as Git.Remote;
+                await Task.Run(() => repo.Fetch(remote, prune, msg => popup?.UpdateStatus(msg)));
+            }
+
+            popup?.Close(true);
+        }
+
+        /// <summary>
+        ///     Cancel.
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void Cancel(object sender, RoutedEventArgs e) {
+            repo.GetPopupManager()?.Close();
+        }
+    }
+}