feature(*): supports multi-repo editing

SourceGit/App.xaml.cs

@@ -36,6 +36,14 @@ namespace SourceGit {
             set;
         }
 
+        /// <summary>
+        ///     Get main window.
+        /// </summary>
+        public static UI.Launcher Launcher {
+            get;
+            private set;
+        }
+
         /// <summary>
         ///     Raise error message.
         /// </summary>
@@ -92,8 +100,8 @@ namespace SourceGit {
             }
 
             // Show main window
-            var launcher = new UI.Launcher();
+            Launcher = new UI.Launcher();
-            launcher.Show();
+            Launcher.Show();
         }
 
         /// <summary>

SourceGit/Git/Repository.cs

@@ -16,7 +16,6 @@ namespace SourceGit.Git {
 
         #region HOOKS
         public static Action<Repository> OnOpen = null;
-        public static Action OnClose = null;
         [XmlIgnore] public Action<string> OnNavigateCommit = null;
         [XmlIgnore] public Action OnWorkingCopyChanged = null;
         [XmlIgnore] public Action OnTagChanged = null;
@@ -355,7 +354,7 @@ namespace SourceGit.Git {
             releasePrefix = null;
             hotfixPrefix = null;
 
-            OnClose?.Invoke();
+            GC.Collect();
         }
         #endregion
 

SourceGit/UI/AddSubmodule.xaml.cs

@@ -34,7 +34,8 @@ namespace SourceGit.UI {
         /// </summary>
         /// <param name="repo"></param>
         public static void Show(Git.Repository repo) {
-            PopupManager.Show(new AddSubmodule(repo));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new AddSubmodule(repo));
         }
 
         #region EVENTS
@@ -57,14 +58,17 @@ namespace SourceGit.UI {
             if (Validation.GetHasError(txtPath)) return;
 
             var recursive = chkRecursive.IsChecked == true;
+            var popup = App.Launcher.GetPopupManager(repo);
 
-            PopupManager.Lock();
+            popup?.Lock();
-            await Task.Run(() => repo.AddSubmodule(RepoURL, LocalPath, recursive, PopupManager.UpdateStatus));
+            await Task.Run(() => repo.AddSubmodule(RepoURL, LocalPath, recursive, msg => {
-            PopupManager.Close(true);
+                popup?.UpdateStatus(msg);
+            }));
+            popup?.Close(true);
         }
 
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
         #endregion
     }

SourceGit/UI/Apply.xaml.cs

@@ -52,7 +52,8 @@ namespace SourceGit.UI {
         /// </summary>
         /// <param name="opened"></param>
         public static void Show(Git.Repository opened) {
-            PopupManager.Show(new Apply(opened));
+            var popup = App.Launcher.GetPopupManager(opened);
+            popup?.Show(new Apply(opened));
         }
 
         /// <summary>
@@ -82,13 +83,14 @@ namespace SourceGit.UI {
             txtPatchFile.GetBindingExpression(TextBox.TextProperty).UpdateSource();
             if (Validation.GetHasError(txtPatchFile)) return;
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
 
             var mode = combWhitespaceOptions.SelectedItem as WhitespaceOption;
             var ignoreSpaceChanges = chkIgnoreWhitespace.IsChecked == true;
             await Task.Run(() => repo.Apply(PatchFile, ignoreSpaceChanges, mode.Arg));
 
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -97,7 +99,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/Blame.xaml.cs

@@ -36,7 +36,7 @@ namespace SourceGit.UI {
             double minWidth = content.ActualWidth;
 
             // Move to center.
-            var parent = App.Current.MainWindow;
+            var parent = App.Launcher;
             Left = parent.Left + (parent.Width - Width) * 0.5;
             Top = parent.Top + (parent.Height - Height) * 0.5;
 

SourceGit/UI/CherryPick.xaml.cs

@@ -1,4 +1,4 @@
-using System.Windows;
+using System.Windows;
 using System.Windows.Controls;
 
 namespace SourceGit.UI {
@@ -29,7 +29,8 @@ namespace SourceGit.UI {
         /// <param name="repo"></param>
         /// <param name="commit"></param>
         public static void Show(Git.Repository repo, Git.Commit commit) {
-            PopupManager.Show(new CherryPick(repo, commit));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new CherryPick(repo, commit));
         }
 
         /// <summary>
@@ -39,7 +40,9 @@ namespace SourceGit.UI {
         /// <param name="e"></param>
         private void Start(object sender, RoutedEventArgs e) {
             repo.CherryPick(commitSHA, chkCommitChanges.IsChecked != true);
-            PopupManager.Close();
+
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Close();
         }
 
         /// <summary>
@@ -48,7 +51,8 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Close();
         }
     }
 }

SourceGit/UI/Clone.xaml.cs

@@ -42,7 +42,8 @@ namespace SourceGit.UI {
         ///     Show clone dialog.
         /// </summary>
         public static void Show() {
-            PopupManager.Show(new Clone());
+            var popup = App.Launcher.GetPopupManager(null);
+            popup?.Show(new Clone());
         }
 
         /// <summary>
@@ -91,16 +92,17 @@ namespace SourceGit.UI {
                 rName = RemoteName;
             }
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(null);
+            popup.Lock();
 
             var repo = await Task.Run(() => {
-                return Git.Repository.Clone(RemoteUri, ParentFolder, rName, repoName, PopupManager.UpdateStatus);
+                return Git.Repository.Clone(RemoteUri, ParentFolder, rName, repoName, popup.UpdateStatus);
             });
 
             if (repo == null) {
-                PopupManager.Unlock();
+                popup.Unlock();
             } else {
-                PopupManager.Close(true);
+                popup.Close(true);
                 repo.Open();
             }
         }
@@ -111,7 +113,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(null).Close();
         }
     }
 }

SourceGit/UI/Configure.xaml.cs

@@ -43,7 +43,8 @@ namespace SourceGit.UI {
         /// </summary>
         /// <param name="repo"></param>
         public static void Show(Git.Repository repo) {
-            PopupManager.Show(new Configure(repo));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new Configure(repo));
         }
 
         #region EVENTS
@@ -63,7 +64,7 @@ namespace SourceGit.UI {
         }
 
         private void Close(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
         #endregion
     }

SourceGit/UI/CreateBranch.xaml.cs

@@ -58,7 +58,9 @@ namespace SourceGit.UI {
             dialog.basedOnDesc.Content = branch.Name;
 
             if (!branch.IsLocal) dialog.txtName.Text = branch.Name.Substring(branch.Remote.Length + 1);
-            PopupManager.Show(dialog);
+
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(dialog);
         }
 
         /// <summary>
@@ -71,7 +73,9 @@ namespace SourceGit.UI {
             dialog.based = tag.Name;
             dialog.basedOnType.Data = dialog.FindResource("Icon.Tag") as Geometry;
             dialog.basedOnDesc.Content = tag.Name;
-            PopupManager.Show(dialog);
+
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(dialog);
         }
 
         /// <summary>
@@ -84,7 +88,9 @@ namespace SourceGit.UI {
             dialog.based = commit.SHA;
             dialog.basedOnType.Data = dialog.FindResource("Icon.Commit") as Geometry;
             dialog.basedOnDesc.Content = $"{commit.ShortSHA}  {commit.Subject}";
-            PopupManager.Show(dialog);
+
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(dialog);
         }
 
         /// <summary>
@@ -96,7 +102,8 @@ namespace SourceGit.UI {
             txtName.GetBindingExpression(TextBox.TextProperty).UpdateSource();
             if (Validation.GetHasError(txtName)) return;
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
 
             bool checkout = chkCheckout.IsChecked == true;
             await Task.Run(() => {
@@ -119,7 +126,7 @@ namespace SourceGit.UI {
                 }
             });
 
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -128,7 +135,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/CreateTag.xaml.cs

@@ -1,4 +1,4 @@
-using System.Linq;
+using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Media;
@@ -51,7 +51,9 @@ namespace SourceGit.UI {
             dialog.based = branch.Head;
             dialog.basedOnType.Data = dialog.FindResource("Icon.Branch") as Geometry;
             dialog.basedOnDesc.Content = branch.Name;
-            PopupManager.Show(dialog);
+
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(dialog);
         }
 
         /// <summary>
@@ -64,7 +66,9 @@ namespace SourceGit.UI {
             dialog.based = commit.SHA;
             dialog.basedOnType.Data = dialog.FindResource("Icon.Commit") as Geometry;
             dialog.basedOnDesc.Content = $"{commit.ShortSHA}  {commit.Subject}";
-            PopupManager.Show(dialog);
+
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(dialog);
         }
 
         /// <summary>
@@ -77,7 +81,9 @@ namespace SourceGit.UI {
             if (Validation.GetHasError(tagName)) return;
 
             Git.Tag.Add(repo, TagName, based, tagMessage.Text);
-            PopupManager.Close();
+
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Close();
         }
 
         /// <summary>
@@ -86,7 +92,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/Dashboard.xaml

@@ -7,8 +7,7 @@
              xmlns:local="clr-namespace:SourceGit.UI"
              xmlns:converters="clr-namespace:SourceGit.Converters"
              mc:Ignorable="d" 
-             d:DesignHeight="450" d:DesignWidth="800"
+             d:DesignHeight="450" d:DesignWidth="800">
-             Unloaded="Cleanup">
     <UserControl.Resources>
         <RoutedUICommand x:Key="OpenSearchBarCommand" Text="OpenSearchBar"/>
         <RoutedUICommand x:Key="HideSearchBarCommand" Text="HideSearchBar"/>
@@ -34,41 +33,19 @@
         <Grid Grid.Row="0" Panel.ZIndex="9999">
             <Border Background="{StaticResource Brush.BG1}">
                 <Border.Effect>
-                    <DropShadowEffect ShadowDepth="2" Direction="270" Opacity=".3"/>
+                    <DropShadowEffect ShadowDepth="2" Direction="270" Opacity=".5" Color="Black"/>
                 </Border.Effect>
             </Border>
 
             <Grid>
                 <Grid.ColumnDefinitions>
-                    <ColumnDefinition Width="*"/>
                     <ColumnDefinition Width="Auto"/>
                     <ColumnDefinition Width="*"/>
+                    <ColumnDefinition Width="Auto"/>
                 </Grid.ColumnDefinitions>
                 
-                <!-- Navigation -->
-                <StackPanel Grid.Column="0" Margin="8,0,0,0" Orientation="Horizontal" HorizontalAlignment="Left">
-                    <Button Click="Close" ToolTip="Back To Welcome" Padding="0">
-                        <StackPanel Orientation="Horizontal">
-                            <Path Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Manager}"/>
-                            <Label Content="Repositories"/>
-                            <Path Width="12" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Navigator}"/>
-                        </StackPanel>
-                    </Button>                    
-                    
-                    <Button x:Name="btnParent" Click="GotoParent" ToolTip="Open Parent Repository" Padding="0" Margin="6,0,0,0" Visibility="Collapsed">
-                        <StackPanel Orientation="Horizontal">
-                            <Path Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Git}"/>
-                            <Label x:Name="txtParent"/>
-                            <Path Width="12" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Navigator}"/>
-                        </StackPanel>
-                    </Button>
-                    
-                    <Path Margin="6,0,0,0" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Git}"/>
-                    <Label x:Name="repoName"/>
-                </StackPanel>
-                
                 <!-- Common Git Options -->
-                <StackPanel Grid.Column="1" Orientation="Horizontal">
+                <StackPanel Grid.Column="0" Orientation="Horizontal" Margin="6,0">
                     <Button Click="OpenFetch" Margin="4,0">
                         <StackPanel Orientation="Horizontal">
                             <Path Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Fetch}"/>
@@ -87,12 +64,18 @@
                             <Label Content="Push"/>
                         </StackPanel>
                     </Button>
-                    <Button Click="OpenStash" Margin="2,0,0,0">
+
+                    <Rectangle Margin="4,0,8,0" Width="1" Height="20" Fill="{StaticResource Brush.Border1}"/>
+                    
+                    <Button Click="OpenStash" Margin="4,0">
                         <StackPanel Orientation="Horizontal">
                             <Path Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.SaveStash}"/>
                             <Label Content="Stash"/>
                         </StackPanel>
                     </Button>
+
+                    <Rectangle Margin="4,0,8,0" Width="1" Height="20" Fill="{StaticResource Brush.Border1}"/>
+                    
                     <Button Click="OpenApply" Margin="4,0">
                         <StackPanel Orientation="Horizontal">
                             <Path Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Apply}"/>
@@ -539,6 +522,6 @@
         </Grid>
         
         <!-- Popups -->
-        <local:PopupManager Grid.Row="1"/>
+        <local:PopupManager x:Name="popupManager" Grid.Row="1"/>
     </Grid>
 </UserControl>

SourceGit/UI/Dashboard.xaml.cs

@@ -67,17 +67,9 @@ namespace SourceGit.UI {
             InitializeComponent();
 
             repo = opened;
-            repoName.Content = repo.Name;
             histories.Repo = opened;
             commits.Repo = opened;
 
-            if (repo.Parent != null) {
-                btnParent.Visibility = Visibility.Visible;
-                txtParent.Content = repo.Parent.Name;
-            } else {
-                btnParent.Visibility = Visibility.Collapsed;
-            }
-
             UpdateBranches();
             UpdateHistories();
             UpdateLocalChanges();
@@ -86,6 +78,17 @@ namespace SourceGit.UI {
             UpdateSubmodules();
         }
 
+        /// <summary>
+        ///     Cleanup all items
+        /// </summary>
+        public void Cleanup() {
+            localBranchTree.ItemsSource = null;
+            remoteBranchTree.ItemsSource = null;
+            tagList.ItemsSource = null;
+            cachedLocalBranches.Clear();
+            cachedRemotes.Clear();
+        }
+
         #region DATA_UPDATE
         private void UpdateHistories() {
             Dispatcher.Invoke(() => {
@@ -244,8 +247,8 @@ namespace SourceGit.UI {
 
                         MakeBranchNode(b, remote.Children, folders, states, "remotes");
                     } else {
-                        /// 对于 SUBMODULE HEAD 出于游离状态（detached on commit id）
+                        /// 对于 SUBMODULE HEAD 出于游离状态（detached on commit id）
-                        /// 此时，分支既不是 本地分支，也不是远程分支
+                        /// 此时，分支既不是 本地分支，也不是远程分支
                         IsDetached = b.IsCurrent;
                     }
                 }
@@ -297,33 +300,9 @@ namespace SourceGit.UI {
                 });
             });
         }
-
-        private void Cleanup(object sender, RoutedEventArgs e) {
-            localBranchTree.ItemsSource = null;
-            remoteBranchTree.ItemsSource = null;
-            tagList.ItemsSource = null;
-            cachedLocalBranches.Clear();
-            cachedRemotes.Clear();
-        }
         #endregion
 
         #region TOOLBAR
-        private void Close(object sender, RoutedEventArgs e) {
-            if (PopupManager.IsLocked()) return;
-            PopupManager.Close();
-
-            cachedLocalBranches.Clear();
-            cachedRemotes.Clear();
-
-            repo.Close();
-        }
-
-        private void GotoParent(object sender, RoutedEventArgs e) {
-            if (repo.Parent == null) return;
-            repo.Parent.Open();
-            e.Handled = true;
-        }
-
         private void OpenFetch(object sender, RoutedEventArgs e) {
             Fetch.Show(repo);
         }
@@ -345,7 +324,7 @@ namespace SourceGit.UI {
         }
 
         private void OpenSearch(object sender, RoutedEventArgs e) {
-            if (PopupManager.IsLocked()) return;
+            if (popupManager.IsLocked()) return;
 
             workspace.SelectedItem = historiesSwitch;
             if (histories.searchBar.Margin.Top == 0) {
@@ -936,7 +915,7 @@ namespace SourceGit.UI {
         }
 
         private void UpdateSubmodule(object sender, RoutedEventArgs e) {
-            Waiting.Show(() => repo.UpdateSubmodule());
+            Waiting.Show(repo, () => repo.UpdateSubmodule());
         }
 
         private void SubmoduleLostFocus(object sender, RoutedEventArgs e) {

SourceGit/UI/DeleteBranch.xaml.cs

@@ -28,7 +28,8 @@ namespace SourceGit.UI {
         /// <param name="opened"></param>
         /// <param name="branch"></param>
         public static void Show(Git.Repository opened, Git.Branch branch) {
-            PopupManager.Show(new DeleteBranch(opened, branch));
+            var popup = App.Launcher.GetPopupManager(opened);
+            popup?.Show(new DeleteBranch(opened, branch));
         }
 
         /// <summary>
@@ -37,9 +38,10 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private async void Sure(object sender, RoutedEventArgs e) {
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
             await Task.Run(() => branch.Delete(repo));
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -48,7 +50,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/DeleteRemote.xaml.cs

@@ -29,7 +29,8 @@ namespace SourceGit.UI {
         /// <param name="opened"></param>
         /// <param name="remote"></param>
         public static void Show(Git.Repository opened, string remote) {
-            PopupManager.Show(new DeleteRemote(opened, remote));
+            var popup = App.Launcher.GetPopupManager(opened);
+            popup?.Show(new DeleteRemote(opened, remote));
         }
 
         /// <summary>
@@ -38,9 +39,10 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private async void Sure(object sender, RoutedEventArgs e) {
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
             await Task.Run(() => Git.Remote.Delete(repo, remote));
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -49,7 +51,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/DeleteTag.xaml.cs

@@ -30,7 +30,8 @@ namespace SourceGit.UI {
         /// <param name="repo"></param>
         /// <param name="tag"></param>
         public static void Show(Git.Repository repo, Git.Tag tag) {
-            PopupManager.Show(new DeleteTag(repo, tag));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new DeleteTag(repo, tag));
         }
 
         /// <summary>
@@ -39,12 +40,13 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private async void Start(object sender, RoutedEventArgs e) {
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
 
             var push = chkWithRemote.IsChecked == true;
             await Task.Run(() => Git.Tag.Delete(repo, tag.Name, push));
 
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -53,7 +55,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/Discard.xaml.cs

@@ -40,17 +40,19 @@ namespace SourceGit.UI {
         /// <param name="opened"></param>
         /// <param name="targets"></param>
         public static void Show(Git.Repository opened, List<Git.Change> targets) {
-            PopupManager.Show(new Discard(opened, targets));
+            var popup = App.Launcher.GetPopupManager(opened);
+            popup?.Show(new Discard(opened, targets));
         }
 
         private async void Sure(object sender, RoutedEventArgs e) {
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
             await Task.Run(() => repo.Discard(changes));
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/Fetch.xaml.cs

@@ -40,7 +40,8 @@ namespace SourceGit.UI {
         /// <param name="repo"></param>
         /// <param name="preferRemote"></param>
         public static void Show(Git.Repository repo, string preferRemote = null) {
-            PopupManager.Show(new Fetch(repo, preferRemote));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new Fetch(repo, preferRemote));
         }
 
         /// <summary>
@@ -51,16 +52,17 @@ namespace SourceGit.UI {
         private async void Start(object sender, RoutedEventArgs e) {
             bool prune = chkPrune.IsChecked == true;
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
 
             if (chkFetchAll.IsChecked == true) {
-                await Task.Run(() => repo.Fetch(null, prune, PopupManager.UpdateStatus));
+                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, PopupManager.UpdateStatus));
+                await Task.Run(() => repo.Fetch(remote, prune, msg => popup?.UpdateStatus(msg)));
             }
 
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -69,7 +71,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/FileHistories.xaml.cs

@@ -29,7 +29,7 @@ namespace SourceGit.UI {
             InitializeComponent();
 
             // Move to center
-            var parent = App.Current.MainWindow;
+            var parent = App.Launcher;
             Left = parent.Left + (parent.Width - Width) * 0.5;
             Top = parent.Top + (parent.Height - Height) * 0.5;
 

SourceGit/UI/GitFlowFinishBranch.xaml.cs

@@ -36,7 +36,8 @@ namespace SourceGit.UI {
                 txtBranchType.Content = "Hotfix :";
                 break;
             default:
-                PopupManager.Close();
+                var popup = App.Launcher.GetPopupManager(repo);
+                popup?.Close();
                 return;
             }
 
@@ -49,7 +50,8 @@ namespace SourceGit.UI {
         /// <param name="repo"></param>
         /// <param name="branch"></param>
         public static void Show(Git.Repository repo, Git.Branch branch) {
-            PopupManager.Show(new GitFlowFinishBranch(repo, branch));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new GitFlowFinishBranch(repo, branch));
         }
 
         /// <summary>
@@ -58,9 +60,10 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private async void Sure(object sender, RoutedEventArgs e) {
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
             await Task.Run(() => repo.FinishGitFlowBranch(branch));
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -69,7 +72,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/GitFlowSetup.xaml.cs

@@ -26,7 +26,8 @@ namespace SourceGit.UI {
         /// </summary>
         /// <param name="repo"></param>
         public static void Show(Git.Repository repo) {
-            PopupManager.Show(new GitFlowSetup(repo));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new GitFlowSetup(repo));
         }
 
         /// <summary>
@@ -35,7 +36,8 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private async void Sure(object sender, RoutedEventArgs e) {
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
 
             var master = txtMaster.Text;
             var dev = txtDevelop.Text;
@@ -45,7 +47,7 @@ namespace SourceGit.UI {
             var version = txtVersion.Text;
 
             await Task.Run(() => repo.EnableGitFlow(master, dev, feature, release, hotfix, version));
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -54,7 +56,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
 
         /// <summary>

SourceGit/UI/GitFlowStartBranch.xaml.cs

@@ -51,7 +51,8 @@ namespace SourceGit.UI {
                 nameValidator.Prefix = hotfixPrefix;
                 break;
             default:
-                PopupManager.Close();
+                var popup = App.Launcher.GetPopupManager(repo);
+                popup?.Close();
                 return;
             }            
         }
@@ -62,7 +63,8 @@ namespace SourceGit.UI {
         /// <param name="repo"></param>
         /// <param name="type"></param>
         public static void Show(Git.Repository repo, Git.Branch.Type type) {
-            PopupManager.Show(new GitFlowStartBranch(repo, type));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new GitFlowStartBranch(repo, type));
         }
 
         /// <summary>
@@ -74,9 +76,10 @@ namespace SourceGit.UI {
             txtName.GetBindingExpression(TextBox.TextProperty).UpdateSource();
             if (Validation.GetHasError(txtName)) return;
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
             await Task.Run(() => repo.StartGitFlowBranch(type, SubName));
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -85,7 +88,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/Histories.xaml.cs

@@ -526,7 +526,7 @@ namespace SourceGit.UI {
                     }
 
                     var dialog = new InteractiveRebase(Repo, commit);
-                    dialog.Owner = App.Current.MainWindow;
+                    dialog.Owner = App.Launcher;
                     dialog.ShowDialog();
                 } else {
                     Rebase.Show(Repo, commit);

SourceGit/UI/Init.xaml.cs

@@ -25,7 +25,8 @@ namespace SourceGit.UI {
         /// </summary>
         /// <param name="path"></param>
         public static void Show(string path) {
-            PopupManager.Show(new Init(path));
+            var popup = App.Launcher.GetPopupManager(null);
+            popup.Show(new Init(path));
         }
 
         /// <summary>
@@ -34,7 +35,8 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private async void Sure(object sender, RoutedEventArgs e) {
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(null);
+            popup.Lock();
 
             await Task.Run(() => {
                 var errs = Git.Repository.RunCommand(workingDir, "init -q", null);
@@ -45,7 +47,7 @@ namespace SourceGit.UI {
                 }
             });
 
-            PopupManager.Close(true);
+            popup.Close(true);
 
             var repo = App.Preference.FindRepository(workingDir);
             if (repo != null) repo.Open();
@@ -57,7 +59,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(null).Close();
         }
     }
 }

SourceGit/UI/Launcher.xaml

@@ -5,6 +5,7 @@
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:source="clr-namespace:SourceGit"
+        xmlns:local="clr-namespace:SourceGit.UI"
         mc:Ignorable="d"
         MinWidth="800" MinHeight="600"
         Title="Source Git"
@@ -33,23 +34,23 @@
                 </Style.Triggers>
             </Style>
         </Border.Style>
-
+        
-        <Grid>
+        <!-- Window Content -->
+        <Grid Background="{StaticResource Brush.BG4}">
             <Grid.RowDefinitions>
                 <RowDefinition Height="32"/>
                 <RowDefinition Height="*"/>
             </Grid.RowDefinitions>
 
-            <!-- Titlebar -->
+            <Grid Grid.Row="0">
-            <Grid Grid.Row="0" Background="{StaticResource Brush.BG4}">
                 <Grid.ColumnDefinitions>
-                    <ColumnDefinition Width="Auto"/>
+                    <ColumnDefinition Width="110"/>
                     <ColumnDefinition Width="*"/>
                     <ColumnDefinition Width="Auto"/>
                 </Grid.ColumnDefinitions>
 
-                <!-- Logo & Title -->
+                <!-- LOGO & Title -->
-                <StackPanel Grid.Column="0" Orientation="Horizontal">
+                <StackPanel Grid.Column="0" Orientation="Horizontal" HorizontalAlignment="Left" VerticalAlignment="Top" Height="32">
                     <Path
                         Width="20" Height="20" Margin="6,-1,2,0"
                         Style="{StaticResource Style.Icon}" 
@@ -60,8 +61,103 @@
                     <Label Content="SOURCE GIT" FontWeight="Light"/>
                 </StackPanel>
 
-                <!-- Commands -->
+                <!-- Tabs -->
-                <StackPanel Grid.Column="2" Orientation="Horizontal" WindowChrome.IsHitTestVisibleInChrome="True">
+                <TabControl
+                    x:Name="openedTabs"
+                    Grid.Column="1"
+                    Padding="0" 
+                    ItemsSource="{Binding ElementName=me, Path=Tabs}">
+                    <TabControl.Style>
+                        <Style TargetType="{x:Type TabControl}">
+                            <Setter Property="Template">
+                                <Setter.Value>
+                                    <ControlTemplate TargetType="{x:Type TabControl}">
+                                        <Grid KeyboardNavigation.TabNavigation="Local" Height="32">
+                                            <StackPanel Orientation="Horizontal"
+                                                x:Name="HeaderPanel" 
+                                                Grid.Row="0" 
+                                                Margin="0,6,0,0" 
+                                                IsItemsHost="True" 
+                                                KeyboardNavigation.TabIndex="1" 
+                                                Background="Transparent" />
+                                        </Grid>
+                                    </ControlTemplate>
+                                </Setter.Value>
+                            </Setter>
+                        </Style>
+                    </TabControl.Style>
+
+                    <TabControl.ItemContainerStyle>
+                        <Style TargetType="{x:Type TabItem}">
+                            <Setter Property="IsSelected" Value="{Binding IsActive, Mode=TwoWay}"/>
+                            <Setter Property="Template">
+                                <Setter.Value>
+                                    <ControlTemplate TargetType="{x:Type TabItem}">
+                                        <Grid x:Name="Container" Opacity=".7" Height="26" WindowChrome.IsHitTestVisibleInChrome="True">
+                                            <Border x:Name="BG" Background="Transparent" BorderThickness="0" BorderBrush="{StaticResource Brush.BG3}" CornerRadius="4,4,0,0">
+                                                <Border.Effect>
+                                                    <DropShadowEffect ShadowDepth="2" Direction="90" Color="Black" Opacity=".3"/>
+                                                </Border.Effect>
+                                            </Border>
+
+                                            <ContentPresenter 
+                                                x:Name="ContentSite" 
+                                                VerticalAlignment="Center" HorizontalAlignment="Center" 
+                                                TextElement.Foreground="{DynamicResource Brush.FG}"
+                                                TextElement.FontWeight="Bold"
+                                                ContentSource="Header"
+                                                Margin="4,0"
+                                                RecognizesAccessKey="True" />
+                                        </Grid>
+                                        <ControlTemplate.Triggers>
+                                            <Trigger Property="IsSelected" Value="True">
+                                                <Setter TargetName="BG" Property="Background" Value="{DynamicResource Brush.BG1}"/>
+                                                <Setter TargetName="BG" Property="BorderThickness" Value="1,1,1,0"/>
+                                                <Setter TargetName="Container" Property="Opacity" Value="1"/>
+                                            </Trigger>
+                                            <MultiTrigger>
+                                                <MultiTrigger.Conditions>
+                                                    <Condition Property="IsSelected" Value="False"/>
+                                                    <Condition Property="IsMouseOver" Value="True"/>
+                                                </MultiTrigger.Conditions>
+                                                <Setter TargetName="BG" Property="Background" Value="{DynamicResource Brush.BG5}"/>
+                                            </MultiTrigger>
+                                        </ControlTemplate.Triggers>
+                                    </ControlTemplate>
+                                </Setter.Value>
+                            </Setter>
+                        </Style>
+                    </TabControl.ItemContainerStyle>
+
+                    <TabControl.ItemTemplate>
+                        <DataTemplate>
+                            <StackPanel Orientation="Horizontal" Margin="6,0">
+                                <Path Grid.Column="0" Width="14" Height="14" x:Name="Icon" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Git}"/>
+                                <TextBlock Grid.Column="1" Text="{Binding Title}" Foreground="{StaticResource Brush.FG}" Margin="8,0,0,0"/>
+                                <Button x:Name="Closer" Margin="8,0,0,0" Grid.Column="2" Click="CloseRepo" ToolTip="CLOSE">
+                                    <Path Width="8" Height="8" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Close}"/>
+                                </Button>
+                            </StackPanel>
+
+                            <DataTemplate.Triggers>
+                                <DataTrigger Binding="{Binding Repo}" Value="{x:Null}">
+                                    <Setter TargetName="Icon" Property="Data" Value="{StaticResource Icon.Manager}"/>
+                                    <Setter TargetName="Closer" Property="Visibility" Value="Collapsed"/>
+                                </DataTrigger>
+                            </DataTemplate.Triggers>
+                        </DataTemplate>
+                    </TabControl.ItemTemplate>
+                </TabControl>
+
+                <!-- Window Command -->
+                <StackPanel
+                    Grid.Column="2"
+                    Margin="32,0,0,0"
+                    Orientation="Horizontal"
+                    HorizontalAlignment="Right"
+                    VerticalAlignment="Top"
+                    Height="32"
+                    WindowChrome.IsHitTestVisibleInChrome="True">
                     <Button Click="ShowPreference" Width="24" ToolTip="PREFERENCE">
                         <Path Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Preference}"/>
                     </Button>
@@ -105,11 +201,32 @@
                 </StackPanel>
             </Grid>
 
-            <!-- Body -->
+            <!-- Pages -->
-            <ContentControl Grid.Row="1" x:Name="body"/>
+            <ItemsControl Grid.Row="1" ItemsSource="{Binding ElementName=me, Path=Tabs}">
+                <ItemsControl.ItemsPanel>
+                    <ItemsPanelTemplate>
+                        <Grid/>
+                    </ItemsPanelTemplate>
+                </ItemsControl.ItemsPanel>
+                <ItemsControl.Resources>
+                    <BooleanToVisibilityConverter x:Key="Bool2Visible"/>
+                </ItemsControl.Resources>
+                <ItemsControl.ItemTemplate>
+                    <DataTemplate>
+                        <ContentControl Content="{Binding Page}" Visibility="{Binding IsActive, Converter={StaticResource Bool2Visible}}"/>
+                    </DataTemplate>
+                </ItemsControl.ItemTemplate>
+            </ItemsControl>
 
             <!-- Alerts -->
-            <ScrollViewer Grid.Row="1" HorizontalAlignment="Right" VerticalAlignment="Top" HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Auto">
+            <ScrollViewer
+                Grid.Row="1"
+                Margin="0,32,0,0"
+                HorizontalAlignment="Right" 
+                VerticalAlignment="Top" 
+                HorizontalScrollBarVisibility="Disabled" 
+                VerticalScrollBarVisibility="Auto"
+                Panel.ZIndex="100">
                 <ItemsControl Margin="4" Width="300" Height="Auto" ItemsSource="{Binding Alerts, ElementName=me}">
                     <ItemsControl.ItemTemplate>
                         <DataTemplate>

SourceGit/UI/Launcher.xaml.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Collections.ObjectModel;
 using System.Windows;
 using System.Windows.Controls;
@@ -11,6 +10,16 @@ namespace SourceGit.UI {
     /// </summary>
     public partial class Launcher : Window {
 
+        /// <summary>
+        ///     Tab data.
+        /// </summary>
+        public class Tab {
+            public string Title { get; set; }
+            public bool IsActive { get; set; }
+            public Git.Repository Repo { get; set; }
+            public object Page { get; set; }
+        }
+
         /// <summary>
         ///     Alert data.
         /// </summary>
@@ -24,37 +33,82 @@ namespace SourceGit.UI {
         /// </summary>
         public ObservableCollection<Alert> Alerts { get; set; } = new ObservableCollection<Alert>();
 
+        /// <summary>
+        ///     Opened tabs.
+        /// </summary>
+        public ObservableCollection<Tab> Tabs { get; set; } = new ObservableCollection<Tab>();
+
         /// <summary>
         ///     Constructor
         /// </summary>
         public Launcher() {
-            Git.Repository.OnOpen = ShowDashboard;
+            App.OnError = msg => {
-            Git.Repository.OnClose = ShowManager;
+                ShowAlert(new Alert() { Title = "ERROR", Message = msg });
+            };
 
-            App.OnError = msg => ShowAlert(new Alert() { Title = "ERROR", Message = msg });
+            Git.Repository.OnOpen = repo => {
+                Dispatcher.Invoke(() => {
+                    foreach (var item in openedTabs.Items) {
+                        var opened = item as Tab;
+                        if (opened != null && opened.Repo != null && repo.Path == opened.Repo.Path) {
+                            openedTabs.SelectedItem = opened;
+                            return;
+                        }
+                    }
+
+                    var tab = new Tab() {
+                        Title = repo.Parent == null ? repo.Name : $"{repo.Parent.Name} : {repo.Name}",
+                        Repo = repo,
+                        Page = new Dashboard(repo),
+                    };
+
+                    Tabs.Add(tab);
+                    openedTabs.SelectedItem = tab;
+                });
+            };
+
+            Tabs.Add(new Tab() {
+                Title = "Repositories",
+                Page = new Manager(),
+            });
 
             InitializeComponent();
-            ShowManager();
+            openedTabs.SelectedItem = Tabs[0];
+        }
+
+        /// <summary>
+        ///     Get popup manager from given active page.
+        /// </summary>
+        /// <param name="repo"></param>
+        /// <returns></returns>
+        public PopupManager GetPopupManager(Git.Repository repo) {
+            if (repo == null) return (Tabs[0].Page as Manager).popupManager;
+
+            foreach (var tab in Tabs) {
+                if (tab.Repo != null && tab.Repo.Path == repo.Path) {
+                    return (tab.Page as Dashboard).popupManager;
+                }
+            }
+
+            return null;
         }
 
         #region LAYOUT_CONTENT
         /// <summary>
-        ///     Show manager.
+        ///     Close repository tab.
         /// </summary>
-        private void ShowManager() {
+        /// <param name="sender"></param>
-            Dispatcher.Invoke(() => {
+        /// <param name="e"></param>
-                body.Content = new Manager();
+        private void CloseRepo(object sender, RoutedEventArgs e) {
-            });
+            var tab = (sender as Button).DataContext as Tab;
-        }
+            if (tab == null || tab.Repo == null) return;
 
-        /// <summary>
+            var popup = (tab.Page as Dashboard).popupManager;
-        ///     Show dashboard.
+            if (popup.IsLocked()) popup.Close(true);
-        /// </summary>
+            Tabs.Remove(tab);
-        /// <param name="repo"></param>
+
-        private void ShowDashboard(Git.Repository repo) {
+            tab.Page = null;
-            Dispatcher.Invoke(() => {
+            tab.Repo.Close();
-                body.Content = new Dashboard(repo);
-            });
         }
 
         /// <summary>
@@ -63,7 +117,9 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void ShowPreference(object sender, RoutedEventArgs e) {
-            Preference.Show();
+            var dialog = new Preference();
+            dialog.Owner = this;
+            dialog.ShowDialog();
         }
 
         /// <summary>

SourceGit/UI/Manager.xaml

@@ -8,37 +8,17 @@
     xmlns:git="clr-namespace:SourceGit.Git"
     mc:Ignorable="d" 
     d:DesignHeight="450" d:DesignWidth="800">
-    <Grid>
+    <Grid>        
-        <Grid.RowDefinitions>
-            <RowDefinition Height="32"/>
-            <RowDefinition Height="*"/>
-        </Grid.RowDefinitions>
-        
-        <!-- Toolbar -->
-        <Grid Grid.Row="0" Panel.ZIndex="9999">
-            <Border Background="{StaticResource Brush.BG1}">
-                <Border.Effect>
-                    <DropShadowEffect ShadowDepth="2" Direction="270" Opacity=".3"/>
-                </Border.Effect>
-            </Border>
-
-            <!-- Navigation -->
-            <StackPanel Grid.Column="0" Margin="8,0,0,0" Orientation="Horizontal">
-                <Path Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Manager}"/>
-                <Label Content="Repositories"/>
-            </StackPanel>
-        </Grid>
-        
         <!-- Main Body -->
-        <Grid Grid.Row="1">
+        <Grid>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="200" MinWidth="200" MaxWidth="360"/>
                 <ColumnDefinition Width="2"/>
                 <ColumnDefinition Width="*"/>
             </Grid.ColumnDefinitions>
-            
+
             <!-- Left panel -->
-            <Grid Grid.Column="0">
+            <Grid Grid.Column="0" Background="{StaticResource Brush.BG1}">
                 <Grid.RowDefinitions>
                     <RowDefinition Height="32"/>
                     <RowDefinition Height="Auto"/>
@@ -148,7 +128,7 @@
                 </TreeView>
             </Grid>
 
-            <GridSplitter Grid.Column="1" HorizontalAlignment="Stretch" Background="Transparent"/>
+            <GridSplitter Grid.Column="1" HorizontalAlignment="Stretch" Background="{StaticResource Brush.BG1}"/>
 
             <!-- Right Panel -->
             <Grid Grid.Column="2" Background="{StaticResource Brush.BG3}">
@@ -161,7 +141,7 @@
                         <RowDefinition Height="Auto"/>
                         <RowDefinition Height="*"/>
                     </Grid.RowDefinitions>
-                    
+
                     <!-- Name & Path & OpenButton -->
                     <Grid Grid.Row="0">
                         <Grid.ColumnDefinitions>
@@ -176,7 +156,7 @@
                             <Path Width="20" Height="20" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Folder}"/>
                         </Button>
                     </Grid>
-                    
+
                     <!-- Status of selected repository -->
                     <Label Grid.Row="1" Content="STATUS" FontSize="16" Margin="0,16,0,4" FontWeight="Bold" Opacity=".8"/>
                     <StackPanel Grid.Row="2" Orientation="Horizontal">
@@ -198,16 +178,16 @@
                     <Border Grid.Row="4" Margin="6,0,0,0" BorderBrush="{StaticResource Brush.BG4}" BorderThickness="1">
                         <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
                             <TextBlock FontSize="10pt"
-                               FontFamily="Consolas"
+                                FontFamily="Consolas"
-                               Padding="8"
+                                Padding="8"
-                               Opacity="0.8"
+                                Opacity="0.8"
-                               Background="{StaticResource Brush.BG2}"
+                                Background="{StaticResource Brush.BG2}"
-                               Foreground="{StaticResource Brush.FG}"
+                                Foreground="{StaticResource Brush.FG}"
-                               x:Name="readme"/>
+                                x:Name="readme"/>
                         </ScrollViewer>
                     </Border>
                 </Grid>
-                
+
                 <!-- Mask -->
                 <Border x:Name="briefMask" Background="{StaticResource Brush.BG3}" IsHitTestVisible="False">
                     <StackPanel Orientation="Vertical" VerticalAlignment="Center" Opacity=".2">
@@ -217,8 +197,8 @@
                 </Border>
             </Grid>
         </Grid>
-
+        
-        <!-- Popups -->
+        <!-- Popup -->
-        <local:PopupManager Grid.Row="1"/>
+        <local:PopupManager x:Name="popupManager"/>
     </Grid>
 </UserControl>

SourceGit/UI/Manager.xaml.cs

@@ -33,11 +33,6 @@ namespace SourceGit.UI {
         ///     Constructor.
         /// </summary>
         public Manager() {
-            Loaded += async (o, e) => {
-                await Task.Delay(500);
-                GC.Collect();
-            };
-
             InitializeComponent();
             UpdateRecentOpened();
             UpdateTree();

SourceGit/UI/Merge.xaml.cs

@@ -53,7 +53,8 @@ namespace SourceGit.UI {
         /// <param name="source"></param>
         /// <param name="dest"></param>
         public static void Show(Git.Repository opened, string source, string dest) {
-            PopupManager.Show(new Merge(opened, source, dest));
+            var popup = App.Launcher.GetPopupManager(opened);
+            popup?.Show(new Merge(opened, source, dest));
         }
 
         /// <summary>
@@ -64,13 +65,14 @@ namespace SourceGit.UI {
         /// <param name="dest"></param>
         public static void StartDirectly(Git.Repository opened, string source, string dest) {
             var merge = new Merge(opened, source, dest);
-            PopupManager.Show(merge);
+            var popup = App.Launcher.GetPopupManager(opened);
-            PopupManager.Lock();
+            popup?.Show(merge);
+            popup?.Lock();
 
             Task.Run(() => {
                 opened.Merge(source, "");
                 merge.Dispatcher.Invoke(() => {
-                    PopupManager.Close(true);
+                    popup?.Close(true);
                 });
             });
         }
@@ -81,13 +83,14 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private async void Start(object sender, RoutedEventArgs e) {
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
 
             var branch = sourceBranch.Content as string;
             var opt = combOptions.SelectedItem as Option;
             await Task.Run(() => repo.Merge(branch, opt.Arg));
 
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -96,7 +99,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/PopupManager.xaml.cs

@@ -10,14 +10,12 @@ namespace SourceGit.UI {
     ///     Common popup manager.
     /// </summary>
     public partial class PopupManager : UserControl {
-        private static PopupManager instance = null;
+        private bool locked = false;
-        private static bool locked = false;
 
         /// <summary>
         ///     Constructor.
         /// </summary>
         public PopupManager() {
-            instance = this;
             InitializeComponent();
         }
 
@@ -25,8 +23,8 @@ namespace SourceGit.UI {
         ///     Show content as popup.
         /// </summary>
         /// <param name="elem"></param>
-        public static void Show(UIElement elem) {
+        public void Show(UIElement elem) {
-            if (instance == null || locked) return;
+            if (locked) return;
 
             var gone = new Thickness(0, -(double)elem.GetValue(HeightProperty) - 16, 0, 0);
 
@@ -35,53 +33,49 @@ namespace SourceGit.UI {
             anim.From = gone;
             anim.To = new Thickness(0);
 
-            instance.statusMsg.Content = "";
+            statusMsg.Content = "";
-            instance.popupContent.Child = elem;
+            popupContent.Child = elem;
-            instance.popupContent.Margin = gone;
+            popupContent.Margin = gone;
-            instance.Visibility = Visibility.Visible;
+            Visibility = Visibility.Visible;
-            instance.popupContent.BeginAnimation(MarginProperty, anim);
+            popupContent.BeginAnimation(MarginProperty, anim);
         }
 
         /// <summary>
         ///     Is current locked.
         /// </summary>
         /// <returns></returns>
-        public static bool IsLocked() {
+        public bool IsLocked() {
             return locked;
         }
 
         /// <summary>
         ///     Lock
         /// </summary>
-        public static void Lock() {
+        public void Lock() {
-            if (instance == null) return;
             locked = true;
+            status.Visibility = Visibility.Visible;
 
-            instance.status.Visibility = Visibility.Visible;
             DoubleAnimation anim = new DoubleAnimation(0, 360, TimeSpan.FromSeconds(1));
             anim.RepeatBehavior = RepeatBehavior.Forever;
-            instance.statusIcon.RenderTransform.BeginAnimation(RotateTransform.AngleProperty, anim);
+            statusIcon.RenderTransform.BeginAnimation(RotateTransform.AngleProperty, anim);
         }
 
         /// <summary>
         ///     Unlock
         /// </summary>
-        public static void Unlock() {
+        public void Unlock() {
-            if (instance == null) return;
             locked = false;
-            instance.statusIcon.RenderTransform.BeginAnimation(RotateTransform.AngleProperty, null);
+            statusIcon.RenderTransform.BeginAnimation(RotateTransform.AngleProperty, null);
-            instance.status.Visibility = Visibility.Collapsed;
+            status.Visibility = Visibility.Collapsed;
         }
 
         /// <summary>
         ///     Update status description
         /// </summary>
         /// <param name="desc"></param>
-        public static void UpdateStatus(string desc) {
+        public void UpdateStatus(string desc) {
-            if (instance == null) return;
+            Dispatcher.Invoke(() => {
-
+                statusMsg.Content = desc;
-            instance.Dispatcher.Invoke(() => {
-                instance.statusMsg.Content = desc;
             });
         }
 
@@ -89,23 +83,23 @@ namespace SourceGit.UI {
         ///     Close current popup.
         /// </summary>
         /// <param name="unlockFirst"></param>
-        public static void Close(bool unlockFirst = false) {
+        public void Close(bool unlockFirst = false) {
-            if (instance == null) return;
+            if (popupContent.Child == null) return;
-            if (instance.popupContent.Child == null) return;
             if (locked && !unlockFirst) return;
             locked = false;
 
             ThicknessAnimation anim = new ThicknessAnimation();
             anim.Duration = TimeSpan.FromMilliseconds(150);
             anim.From = new Thickness(0);
-            anim.To = new Thickness(0, -(double)instance.popupContent.Child.GetValue(HeightProperty) - 16, 0, 0);
+            anim.To = new Thickness(0, -(double)popupContent.Child.GetValue(HeightProperty) - 16, 0, 0);
             anim.Completed += (obj, ev) => {
-                instance.Visibility = Visibility.Collapsed;
+                Visibility = Visibility.Collapsed;
-                instance.popupContent.Child = null;
+                popupContent.Child = null;
             };
-            instance.popupContent.BeginAnimation(MarginProperty, anim);
+            
-            instance.statusIcon.RenderTransform.BeginAnimation(RotateTransform.AngleProperty, null);
+            popupContent.BeginAnimation(MarginProperty, anim);            
-            instance.status.Visibility = Visibility.Collapsed;
+            statusIcon.RenderTransform.BeginAnimation(RotateTransform.AngleProperty, null);
+            status.Visibility = Visibility.Collapsed;
         }
 
         /// <summary>

SourceGit/UI/Preference.xaml

@@ -1,4 +1,4 @@
-<UserControl x:Class="SourceGit.UI.Preference"
+<Window x:Class="SourceGit.UI.Preference"
         x:Name="me"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
@@ -8,141 +8,182 @@
         xmlns:app="clr-namespace:SourceGit"
         xmlns:git="clr-namespace:SourceGit.Git"
         mc:Ignorable="d"
-        Height="500" Width="500">
+        Height="520" Width="500"
-    <Grid>
+        Title="Preference"
-        <Grid.RowDefinitions>
+        WindowStartupLocation="CenterOwner" ResizeMode="NoResize">
-            <RowDefinition Height="36"/>
-            <RowDefinition Height="28"/>
-            <RowDefinition Height="18"/>
-            <RowDefinition Height="36"/>
-            <RowDefinition Height="28"/>
-            <RowDefinition Height="28"/>
-            <RowDefinition Height="18"/>
-            <RowDefinition Height="36"/>
-            <RowDefinition Height="28"/>
-            <RowDefinition Height="28"/>
-            <RowDefinition Height="28"/>
-            <RowDefinition Height="18"/>
-            <RowDefinition Height="36"/>
-            <RowDefinition Height="28"/>
-            <RowDefinition Height="28"/>
-            <RowDefinition Height="28"/>
-            <RowDefinition Height="18"/>
-            <RowDefinition Height="32"/>
-        </Grid.RowDefinitions>
 
-        <Grid.ColumnDefinitions>
+    <!-- Enable WindowChrome Feature -->
-            <ColumnDefinition Width="120"/>
+    <WindowChrome.WindowChrome>
-            <ColumnDefinition MinWidth="200" Width="*"/>
+        <WindowChrome UseAeroCaptionButtons="False" CornerRadius="0" CaptionHeight="32"/>
-        </Grid.ColumnDefinitions>
+    </WindowChrome.WindowChrome>
-        
-        <!-- 显示 -->
-        <Label Grid.Row="0" Grid.ColumnSpan="2" Content="APPEARANCE" FontSize="16" FontWeight="DemiBold" Opacity=".85"/>
-        <Label Grid.Row="1" Grid.Column="0" Content="Light Theme :" HorizontalAlignment="Right"/>
-        <CheckBox 
-            Grid.Row="1" 
-            Grid.Column="1" 
-            IsChecked="{Binding Source={x:Static app:App.Preference}, Path=UIUseLightTheme, Mode=TwoWay}"
-            Content="Restart required"
-            TextElement.FontStyle="Italic"/>
 
-        <!-- GIT相关配置 -->
+    <!-- Window Layout -->
-        <Label Grid.Row="3" Grid.ColumnSpan="2" Content="GIT INSTANCE" FontSize="16" FontWeight="DemiBold" Opacity=".85"/>
+    <Border Background="{StaticResource Brush.BG1}">
-        <Label Grid.Row="4" Grid.Column="0" Content="Install Path :" HorizontalAlignment="Right"/>
+        <Grid>
-        <Grid Grid.Row="4" Grid.Column="1">
+            <Grid.RowDefinitions>
-            <Grid.ColumnDefinitions>
+                <RowDefinition Height="32"/>
-                <ColumnDefinition Width="*"/>
+                <RowDefinition Height="*"/>
-                <ColumnDefinition Width="28"/>
+            </Grid.RowDefinitions>
-            </Grid.ColumnDefinitions>
 
-            <TextBox Grid.Column="0"
+            <!-- Titlebar -->
-                         x:Name="txtGitPath"
+            <Grid Grid.Row="0" Background="{StaticResource Brush.BG4}">
-                         Height="24" 
+                <Grid.ColumnDefinitions>
-                         Text="{Binding Source={x:Static app:App.Preference}, Path=GitExecutable, Mode=TwoWay}"
+                    <ColumnDefinition Width="Auto"/>
-                         helpers:TextBoxHelper.Placeholder="Input path for git.exe"/>
+                    <ColumnDefinition Width="Auto"/>
-            <Button Grid.Column="1" Width="24" Height="24" Click="SelectGitPath" Padding="0" BorderThickness="1" Style="{StaticResource Style.Button.Bordered}">
+                    <ColumnDefinition Width="*"/>
-                <Path Width="14" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Folder}"/>
+                    <ColumnDefinition Width="Auto"/>
-            </Button>
+                </Grid.ColumnDefinitions>
+
+                <!-- LOGO -->
+                <Path Width="20" Height="20" Margin="6,-1,2,0" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Git}" Fill="#FFF05133"/>
+
+                <!-- Title -->
+                <Label Grid.Column="1" Content="Preference" FontWeight="Light"/>
+
+                <!-- Close Button -->
+                <Button Click="Close" Width="32" Grid.Column="3" WindowChrome.IsHitTestVisibleInChrome="True">
+                    <Button.Style>
+                        <Style TargetType="{x:Type Button}" BasedOn="{StaticResource Style.Button.HighlightHover}">
+                            <Style.Triggers>
+                                <Trigger Property="IsMouseOver" Value="True">
+                                    <Setter Property="Background" Value="Red"/>
+                                </Trigger>
+                            </Style.Triggers>
+                        </Style>
+                    </Button.Style>
+
+                    <Path Width="10" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Close}"/>
+                </Button>
+            </Grid>
+
+            <!-- Content -->
+            <Grid Grid.Row="1" Margin="16,8">
+                <Grid.RowDefinitions>
+                    <RowDefinition Height="36"/>
+                    <RowDefinition Height="28"/>
+                    <RowDefinition Height="18"/>
+                    <RowDefinition Height="36"/>
+                    <RowDefinition Height="28"/>
+                    <RowDefinition Height="28"/>
+                    <RowDefinition Height="18"/>
+                    <RowDefinition Height="36"/>
+                    <RowDefinition Height="28"/>
+                    <RowDefinition Height="28"/>
+                    <RowDefinition Height="28"/>
+                    <RowDefinition Height="18"/>
+                    <RowDefinition Height="36"/>
+                    <RowDefinition Height="28"/>
+                    <RowDefinition Height="28"/>
+                    <RowDefinition Height="28"/>
+                </Grid.RowDefinitions>
+
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="120"/>
+                    <ColumnDefinition MinWidth="200" Width="*"/>
+                </Grid.ColumnDefinitions>
+
+                <!-- 显示 -->
+                <Label Grid.Row="0" Grid.ColumnSpan="2" Content="APPEARANCE" FontSize="16" FontWeight="DemiBold" Opacity=".85"/>
+                <Label Grid.Row="1" Grid.Column="0" Content="Light Theme :" HorizontalAlignment="Right"/>
+                <CheckBox 
+                    Grid.Row="1" 
+                    Grid.Column="1" 
+                    IsChecked="{Binding Source={x:Static app:App.Preference}, Path=UIUseLightTheme, Mode=TwoWay}"
+                    Content="Restart required"
+                    TextElement.FontStyle="Italic"/>
+
+                <!-- GIT相关配置 -->
+                <Label Grid.Row="3" Grid.ColumnSpan="2" Content="GIT INSTANCE" FontSize="16" FontWeight="DemiBold" Opacity=".85"/>
+                <Label Grid.Row="4" Grid.Column="0" Content="Install Path :" HorizontalAlignment="Right"/>
+                <Grid Grid.Row="4" Grid.Column="1">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*"/>
+                        <ColumnDefinition Width="28"/>
+                    </Grid.ColumnDefinitions>
+
+                    <TextBox Grid.Column="0"
+                             x:Name="txtGitPath"
+                             Height="24" 
+                             Text="{Binding Source={x:Static app:App.Preference}, Path=GitExecutable, Mode=TwoWay}"
+                             helpers:TextBoxHelper.Placeholder="Input path for git.exe"/>
+                    <Button Grid.Column="1" Width="24" Height="24" Click="SelectGitPath" Padding="0" BorderThickness="1" Style="{StaticResource Style.Button.Bordered}">
+                        <Path Width="14" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Folder}"/>
+                    </Button>
+                </Grid>
+                <Label Grid.Row="5" Grid.Column="0" Content="Default Clone Dir :" HorizontalAlignment="Right"/>
+                <Grid Grid.Row="5" Grid.Column="1">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*"/>
+                        <ColumnDefinition Width="28"/>
+                    </Grid.ColumnDefinitions>
+
+                    <TextBox Grid.Column="0" 
+                             x:Name="txtGitCloneDir"
+                             Height="24" 
+                             Text="{Binding Source={x:Static app:App.Preference}, Path=GitDefaultCloneDir, Mode=TwoWay}"
+                             helpers:TextBoxHelper.Placeholder="Default path to clone repo into"/>
+                    <Button Grid.Column="1" Width="24" Height="24" Click="SelectDefaultClonePath" Padding="0" BorderThickness="1" Style="{StaticResource Style.Button.Bordered}">
+                        <Path Width="14" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Folder}"/>
+                    </Button>
+                </Grid>
+
+                <!-- Global User -->
+                <Label Grid.Row="7" Grid.ColumnSpan="2" Content="GLOBAL SETTING" FontSize="16" FontWeight="DemiBold" Opacity=".85"/>
+                <Label Grid.Row="8" Grid.Column="0" Content="Name :" HorizontalAlignment="Right"/>
+                <TextBox Grid.Row="8" Grid.Column="1" Height="24" helpers:TextBoxHelper.Placeholder="Global git user name" Text="{Binding ElementName=me, Path=GlobalUser, Mode=TwoWay}"/>
+                <Label Grid.Row="9" Grid.Column="0" Content="Email :" HorizontalAlignment="Right"/>
+                <TextBox Grid.Row="9" Grid.Column="1" Height="24" helpers:TextBoxHelper.Placeholder="Global git user email" Text="{Binding ElementName=me, Path=GlobalUserEmail, Mode=TwoWay}"/>
+                <Label Grid.Row="10" Grid.Column="0" Content="Auto CRLF :" HorizontalAlignment="Right"/>
+                <ComboBox Grid.Row="10" Grid.Column="1"
+                      x:Name="cmbAutoCRLF"
+                      Height="24"
+                      HorizontalAlignment="Stretch"
+                      VerticalContentAlignment="Center"
+                      SelectionChanged="AutoCRLFSelectionChanged">
+                    <ComboBox.ItemTemplate>
+                        <DataTemplate>
+                            <StackPanel Orientation="Horizontal" Height="20">
+                                <Label Content="{Binding Value}" Padding="0" VerticalContentAlignment="Center"/>
+                                <Label Content="{Binding Desc}" Foreground="{StaticResource Brush.FG2}" FontSize="10" Margin="8,0,0,0" Padding="0"/>
+                            </StackPanel>
+                        </DataTemplate>
+                    </ComboBox.ItemTemplate>
+                </ComboBox>
+
+                <!-- 合并工具配置 -->
+                <Label Grid.Row="12" Grid.ColumnSpan="2" Content="MERGE TOOL" FontSize="16" FontWeight="DemiBold" Opacity=".85"/>
+                <Label Grid.Row="13" Grid.Column="0" Content="Merger :" HorizontalAlignment="Right"/>
+                <ComboBox Grid.Row="13" Grid.Column="1"
+                     Height="24"
+                     Padding="2,0,0,0"
+                     HorizontalContentAlignment="Left"
+                     VerticalContentAlignment="Center"
+                     SelectedIndex="{Binding Source={x:Static app:App.Preference}, Path=MergeTool, Mode=TwoWay}"
+                     ItemsSource="{Binding Source={x:Static git:MergeTool.Supported}}"
+                     DisplayMemberPath="Name"
+                     SelectionChanged="ChangeMergeTool"/>
+                <Label Grid.Row="14" Grid.Column="0" Content="Install Path :" HorizontalAlignment="Right"/>
+                <Grid Grid.Row="14" Grid.Column="1">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*"/>
+                        <ColumnDefinition Width="28"/>
+                    </Grid.ColumnDefinitions>
+
+                    <TextBox Grid.Column="0" 
+                             x:Name="txtMergePath"
+                             Height="24" 
+                             Text="{Binding Source={x:Static app:App.Preference}, Path=MergeExecutable, Mode=TwoWay}"
+                             helpers:TextBoxHelper.Placeholder="Input path for merge tool"/>
+                    <Button Grid.Column="1" Width="24" Height="24" Click="SelectMergeToolPath" Padding="0" BorderThickness="1" Style="{StaticResource Style.Button.Bordered}">
+                        <Path Width="14" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Folder}"/>
+                    </Button>
+                </Grid>
+                <Label Grid.Row="15" Grid.Column="0" Content="Command :" HorizontalAlignment="Right"/>
+                <TextBlock Grid.Row="15" Grid.Column="1" 
+                       x:Name="txtMergeParam"
+                       VerticalAlignment="Center"
+                       Foreground="{StaticResource Brush.FG2}"/>
+            </Grid>
         </Grid>
-        <Label Grid.Row="5" Grid.Column="0" Content="Default Clone Dir :" HorizontalAlignment="Right"/>
+    </Border>
-        <Grid Grid.Row="5" Grid.Column="1">
+</Window>
-            <Grid.ColumnDefinitions>
-                <ColumnDefinition Width="*"/>
-                <ColumnDefinition Width="28"/>
-            </Grid.ColumnDefinitions>
-
-            <TextBox Grid.Column="0" 
-                         x:Name="txtGitCloneDir"
-                         Height="24" 
-                         Text="{Binding Source={x:Static app:App.Preference}, Path=GitDefaultCloneDir, Mode=TwoWay}"
-                         helpers:TextBoxHelper.Placeholder="Default path to clone repo into"/>
-            <Button Grid.Column="1" Width="24" Height="24" Click="SelectDefaultClonePath" Padding="0" BorderThickness="1" Style="{StaticResource Style.Button.Bordered}">
-                <Path Width="14" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Folder}"/>
-            </Button>
-        </Grid>
-        
-        <!-- Global User -->
-        <Label Grid.Row="7" Grid.ColumnSpan="2" Content="GLOBAL SETTING" FontSize="16" FontWeight="DemiBold" Opacity=".85"/>
-        <Label Grid.Row="8" Grid.Column="0" Content="Name :" HorizontalAlignment="Right"/>
-        <TextBox Grid.Row="8" Grid.Column="1" Height="24" helpers:TextBoxHelper.Placeholder="Global git user name" Text="{Binding ElementName=me, Path=GlobalUser, Mode=TwoWay}"/>
-        <Label Grid.Row="9" Grid.Column="0" Content="Email :" HorizontalAlignment="Right"/>
-        <TextBox Grid.Row="9" Grid.Column="1" Height="24" helpers:TextBoxHelper.Placeholder="Global git user email" Text="{Binding ElementName=me, Path=GlobalUserEmail, Mode=TwoWay}"/>
-        <Label Grid.Row="10" Grid.Column="0" Content="Auto CRLF :" HorizontalAlignment="Right"/>
-        <ComboBox Grid.Row="10" Grid.Column="1"
-                  x:Name="cmbAutoCRLF"
-                  Height="24"
-                  HorizontalAlignment="Stretch"
-                  VerticalContentAlignment="Center"
-                  SelectionChanged="AutoCRLFSelectionChanged">
-            <ComboBox.ItemTemplate>
-                <DataTemplate>
-                    <StackPanel Orientation="Horizontal" Height="20">
-                        <Label Content="{Binding Value}" Padding="0" VerticalContentAlignment="Center"/>
-                        <Label Content="{Binding Desc}" Foreground="{StaticResource Brush.FG2}" FontSize="10" Margin="8,0,0,0" Padding="0"/>
-                    </StackPanel>
-                </DataTemplate>
-            </ComboBox.ItemTemplate>
-        </ComboBox>
-
-        <!-- 合并工具配置 -->
-        <Label Grid.Row="12" Grid.ColumnSpan="2" Content="MERGE TOOL" FontSize="16" FontWeight="DemiBold" Opacity=".85"/>
-        <Label Grid.Row="13" Grid.Column="0" Content="Merger :" HorizontalAlignment="Right"/>
-        <ComboBox Grid.Row="13" Grid.Column="1"
-             Height="24"
-             Padding="2,0,0,0"
-             HorizontalContentAlignment="Left"
-             VerticalContentAlignment="Center"
-             SelectedIndex="{Binding Source={x:Static app:App.Preference}, Path=MergeTool, Mode=TwoWay}"
-             ItemsSource="{Binding Source={x:Static git:MergeTool.Supported}}"
-             DisplayMemberPath="Name"
-             SelectionChanged="ChangeMergeTool"/>
-        <Label Grid.Row="14" Grid.Column="0" Content="Install Path :" HorizontalAlignment="Right"/>
-        <Grid Grid.Row="14" Grid.Column="1">
-            <Grid.ColumnDefinitions>
-                <ColumnDefinition Width="*"/>
-                <ColumnDefinition Width="28"/>
-            </Grid.ColumnDefinitions>
-
-            <TextBox Grid.Column="0" 
-                         x:Name="txtMergePath"
-                         Height="24" 
-                         Text="{Binding Source={x:Static app:App.Preference}, Path=MergeExecutable, Mode=TwoWay}"
-                         helpers:TextBoxHelper.Placeholder="Input path for merge tool"/>
-            <Button Grid.Column="1" Width="24" Height="24" Click="SelectMergeToolPath" Padding="0" BorderThickness="1" Style="{StaticResource Style.Button.Bordered}">
-                <Path Width="14" Style="{StaticResource Style.Icon}" Data="{StaticResource Icon.Folder}"/>
-            </Button>
-        </Grid>
-        <Label Grid.Row="15" Grid.Column="0" Content="Command :" HorizontalAlignment="Right"/>
-        <TextBlock Grid.Row="15" Grid.Column="1" 
-                   x:Name="txtMergeParam"
-                   VerticalAlignment="Center"
-                   Foreground="{StaticResource Brush.FG2}"/>
-
-        <Button Grid.Row="17" Grid.Column="1" 
-                Content="CLOSE"
-                Click="Close"
-                Width="80"
-                Style="{StaticResource Style.Button.AccentBordered}"
-                HorizontalAlignment="Right"/>
-    </Grid>
-</UserControl>

SourceGit/UI/Preference.xaml.cs

@@ -11,7 +11,7 @@ namespace SourceGit.UI {
     /// <summary>
     ///     Preference window.
     /// </summary>
-    public partial class Preference : UserControl {
+    public partial class Preference : Window {
 
         /// <summary>
         ///     Git global user name.
@@ -75,13 +75,6 @@ namespace SourceGit.UI {
             cmbAutoCRLF.SelectedItem = crlfOptions.Find(o => o.Value == AutoCRLF);
         }
 
-        /// <summary>
-        ///     Show preference.
-        /// </summary>
-        public static void Show() {
-            PopupManager.Show(new Preference());
-        }
-
         /// <summary>
         ///     Close this dialog
         /// </summary>
@@ -95,7 +88,7 @@ namespace SourceGit.UI {
             var oldAutoCRLF = GetConfig("core.autocrlf");
             if (oldAutoCRLF != AutoCRLF) SetConfig("core.autocrlf", AutoCRLF);
 
-            PopupManager.Close();
+            Close();
         }
 
         /// <summary>

SourceGit/UI/Pull.xaml.cs

@@ -30,7 +30,8 @@ namespace SourceGit.UI {
         /// <param name="opened">Opened repository</param>
         /// <param name="preferRemoteBranch">Prefered remote branch</param>
         public static void Show(Git.Repository opened, string preferRemoteBranch = null) {
-            PopupManager.Show(new Pull(opened, preferRemoteBranch));
+            var popup = App.Launcher.GetPopupManager(opened);
+            popup?.Show(new Pull(opened, preferRemoteBranch));
         }
 
         /// <summary>
@@ -76,9 +77,10 @@ namespace SourceGit.UI {
 
             if (remote == null || branch == null) return;
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
-            await Task.Run(() => repo.Pull(remote, branch.Substring(branch.IndexOf('/')+1), PopupManager.UpdateStatus, rebase, autoStash));
+            popup?.Lock();
-            PopupManager.Close(true);
+            await Task.Run(() => repo.Pull(remote, branch.Substring(branch.IndexOf('/')+1), msg => popup?.UpdateStatus(msg), rebase, autoStash));
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -87,7 +89,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
 
         /// <summary>

SourceGit/UI/Push.xaml.cs

@@ -29,7 +29,8 @@ namespace SourceGit.UI {
         /// <param name="repo"></param>
         /// <param name="prefer"></param>
         public static void Show(Git.Repository repo, Git.Branch prefer = null) {
-            PopupManager.Show(new Push(repo, prefer));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new Push(repo, prefer));
         }
 
         /// <summary>
@@ -44,8 +45,9 @@ namespace SourceGit.UI {
             }
 
             var push = new Push(repo, current);
-            PopupManager.Show(push);
+            var popup = App.Launcher.GetPopupManager(repo);
-            PopupManager.Lock();
+            popup?.Show(push);
+            popup?.Lock();
 
             var upstream = current.Upstream.Substring(13);
             var remoteIdx = upstream.IndexOf('/');
@@ -53,9 +55,9 @@ namespace SourceGit.UI {
             var remoteBranch = upstream.Substring(remoteIdx + 1);
 
             Task.Run(() => {
-                repo.Push(remote, current.Name, remoteBranch, PopupManager.UpdateStatus);
+                repo.Push(remote, current.Name, remoteBranch, msg => popup?.UpdateStatus(msg));
                 push.Dispatcher.Invoke(() => {
-                    PopupManager.Close(true);
+                    popup?.Close(true);
                 });                
             });            
         }
@@ -96,9 +98,10 @@ namespace SourceGit.UI {
                 remoteBranch = remoteBranch.Substring(0, remoteBranch.Length - 6);
             }
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
-            await Task.Run(() => repo.Push(remote, localBranch.Name, remoteBranch, PopupManager.UpdateStatus, tags, track, force));
+            popup?.Lock();
-            PopupManager.Close(true);
+            await Task.Run(() => repo.Push(remote, localBranch.Name, remoteBranch, msg => popup?.UpdateStatus(msg), tags, track, force));
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -107,7 +110,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
 
         /// <summary>

SourceGit/UI/PushTag.xaml.cs

@@ -32,7 +32,8 @@ namespace SourceGit.UI {
         /// <param name="repo"></param>
         /// <param name="tag"></param>
         public static void Show(Git.Repository repo, Git.Tag tag) {
-            PopupManager.Show(new PushTag(repo, tag));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new PushTag(repo, tag));
         }
 
         /// <summary>
@@ -44,9 +45,10 @@ namespace SourceGit.UI {
             var remote = combRemotes.SelectedItem as Git.Remote;
             if (remote == null) return;
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
             await Task.Run(() => Git.Tag.Push(repo, tag.Name, remote.Name));
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -55,7 +57,8 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Close();
         }
     }
 }

SourceGit/UI/Rebase.xaml.cs

@@ -37,7 +37,9 @@ namespace SourceGit.UI {
             dialog.branch.Content = current.Name;
             dialog.type.Data = dialog.FindResource("Icon.Branch") as Geometry;
             dialog.desc.Content = branch.Name;
-            PopupManager.Show(dialog);
+
+            var popup = App.Launcher.GetPopupManager(opened);
+            popup?.Show(dialog);
         }
 
         /// <summary>
@@ -54,7 +56,9 @@ namespace SourceGit.UI {
             dialog.branch.Content = current.Name;
             dialog.type.Data = dialog.FindResource("Icon.Commit") as Geometry;
             dialog.desc.Content = $"{commit.ShortSHA}  {commit.Subject}";
-            PopupManager.Show(dialog);
+
+            var popup = App.Launcher.GetPopupManager(opened);
+            popup?.Show(dialog);
         }
 
         /// <summary>
@@ -63,16 +67,17 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private async void Start(object sender, RoutedEventArgs e) {
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
 
             var autoStash = chkAutoStash.IsChecked == true;
             await Task.Run(() => repo.Rebase(based, autoStash));
 
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/Remote.xaml.cs

@@ -44,7 +44,7 @@ namespace SourceGit.UI {
         /// <param name="opened"></param>
         /// <param name="editing"></param>
         public static void Show(Git.Repository opened, Git.Remote editing = null) {
-            PopupManager.Show(new Remote(opened, editing));
+            App.Launcher.GetPopupManager(opened)?.Show(new Remote(opened, editing));
         }
 
         /// <summary>
@@ -59,7 +59,8 @@ namespace SourceGit.UI {
             txtUrl.GetBindingExpression(TextBox.TextProperty).UpdateSource();
             if (Validation.GetHasError(txtUrl)) return;
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
 
             await Task.Run(() => {
                 if (remote != null) {
@@ -69,7 +70,7 @@ namespace SourceGit.UI {
                 }
             });
 
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -78,7 +79,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/RenameBranch.xaml.cs

@@ -38,7 +38,7 @@ namespace SourceGit.UI {
         /// <param name="opened"></param>
         /// <param name="branch"></param>
         public static void Show(Git.Repository opened, Git.Branch branch) {
-            PopupManager.Show(new RenameBranch(opened, branch));
+            App.Launcher.GetPopupManager(opened)?.Show(new RenameBranch(opened, branch));
         }
 
         /// <summary>
@@ -50,9 +50,10 @@ namespace SourceGit.UI {
             txtNewName.GetBindingExpression(TextBox.TextProperty).UpdateSource();
             if (Validation.GetHasError(txtNewName)) return;
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
             await Task.Run(() => branch.Rename(repo, NewName));
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -61,7 +62,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/Reset.xaml.cs

@@ -59,7 +59,7 @@ namespace SourceGit.UI {
             var current = repo.CurrentBranch();
             if (current == null) return;
 
-            PopupManager.Show(new Reset(repo, current, commit));
+            App.Launcher.GetPopupManager(repo)?.Show(new Reset(repo, current, commit));
         }
 
         /// <summary>
@@ -71,9 +71,10 @@ namespace SourceGit.UI {
             var mode = combMode.SelectedItem as Mode;
             if (mode == null) return;
 
-            PopupManager.Lock();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Lock();
             await Task.Run(() => repo.Reset(revision, mode.Arg));
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -82,7 +83,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/Revert.xaml.cs

@@ -30,7 +30,8 @@ namespace SourceGit.UI {
         /// <param name="repo"></param>
         /// <param name="commit"></param>
         public static void Show(Git.Repository repo, Git.Commit commit) {
-            PopupManager.Show(new Revert(repo, commit));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new Revert(repo, commit));
         }
 
         /// <summary>
@@ -40,10 +41,10 @@ namespace SourceGit.UI {
         /// <param name="e"></param>
         private async void Sure(object sender, RoutedEventArgs e) {
             bool autoCommit = chkCommit.IsChecked == true;
-
+            var popup = App.Launcher.GetPopupManager(repo);
-            PopupManager.Lock();
+            popup?.Lock();
             await Task.Run(() => repo.Revert(sha, autoCommit));
-            PopupManager.Close(true);
+            popup?.Close(true);
         }
 
         /// <summary>
@@ -52,7 +53,8 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Close();
         }
     }
 }

SourceGit/UI/Stash.xaml.cs

@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Windows;
 using System.Windows.Controls;
 
@@ -28,7 +28,8 @@ namespace SourceGit.UI {
         /// <param name="repo">Opened repository</param>
         /// <param name="files">Special files to stash</param>
         public static void Show(Git.Repository repo, List<string> files) {
-            PopupManager.Show(new Stash(repo, files));
+            var popup = App.Launcher.GetPopupManager(repo);
+            popup?.Show(new Stash(repo, files));
         }
 
         /// <summary>
@@ -41,7 +42,7 @@ namespace SourceGit.UI {
             string message = txtName.Text;
 
             Git.Stash.Push(repo, includeUntracked, message, files);
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
 
         /// <summary>
@@ -50,7 +51,7 @@ namespace SourceGit.UI {
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Cancel(object sender, RoutedEventArgs e) {
-            PopupManager.Close();
+            App.Launcher.GetPopupManager(repo)?.Close();
         }
     }
 }

SourceGit/UI/Waiting.xaml.cs

@@ -19,15 +19,18 @@ namespace SourceGit.UI {
         /// <summary>
         ///     Show this dialog.
         /// </summary>
+        /// <param name="repo"></param>
         /// <param name="job"></param>
-        public static void Show(Action job) {
+        public static void Show(Git.Repository repo, Action job) {
             var dialog = new Waiting();
-            PopupManager.Show(dialog);
+            var popup = App.Launcher.GetPopupManager(repo);
-            PopupManager.Lock();
+
+            popup?.Show(dialog);
+            popup?.Lock();
             Task.Run(() => {
                 job.Invoke();
                 dialog.Dispatcher.Invoke(() => {
-                    PopupManager.Close(true);
+                    popup?.Close(true);
                 });
             });
         }