optimize(*): speed up for openning same repository that already opened before

SourceGit/App.xaml.cs

@@ -54,8 +54,8 @@ namespace SourceGit {
             if (main == null) return null;
             if (repo == null) return (main.Tabs[0].Page as UI.Manager).popupManager;
 
-            for (int i = 1; i < main.openedTabs.Items.Count; i++) {
+            for (int i = 1; i < main.Tabs.Count; i++) {
-                var opened = main.openedTabs.Items[i] as UI.Launcher.Tab;
+                var opened = main.Tabs[i];
                 if (opened.Repo.Path == repo.Path) {
                     return (opened.Page as UI.Dashboard).popupManager;
                 }

SourceGit/UI/Dashboard.xaml.cs

@@ -958,7 +958,8 @@ namespace SourceGit.UI {
             sub.Path = Path.Combine(repo.Path, path);
             sub.Name = Path.GetFileName(path);
             sub.Parent = repo;
-            sub.Open();
+
+            if (!(App.Current.MainWindow as Launcher).GotoRepo(sub)) sub.Open();            
         }
         #endregion
 

SourceGit/UI/Launcher.xaml.cs

@@ -48,14 +48,6 @@ namespace SourceGit.UI {
 
             Git.Repository.OnOpen = repo => {
                 Dispatcher.Invoke(() => {
-                    for (int i = 1; i < openedTabs.Items.Count; i++) {
-                        var opened = openedTabs.Items[i] as Tab;
-                        if (opened.Repo.Path == repo.Path) {
-                            openedTabs.SelectedItem = opened;
-                            return;
-                        }
-                    }
-
                     var tab = new Tab() {
                         Title = repo.Parent == null ? repo.Name : $"{repo.Parent.Name} : {repo.Name}",
                         Repo = repo,
@@ -76,6 +68,23 @@ namespace SourceGit.UI {
             openedTabs.SelectedItem = Tabs[0];
         }
 
+        /// <summary>
+        ///     Goto opened repository.
+        /// </summary>
+        /// <param name="repo"></param>
+        /// <returns></returns>
+        public bool GotoRepo(Git.Repository repo) {
+            for (int i = 1; i < Tabs.Count; i++) {
+                var opened = Tabs[i];
+                if (opened.Repo.Path == repo.Path) {
+                    openedTabs.SelectedItem = opened;
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
         #region LAYOUT_CONTENT
         /// <summary>
         ///     Close repository tab.

SourceGit/UI/Manager.xaml.cs

@@ -402,7 +402,7 @@ namespace SourceGit.UI {
             }
 
             var repo = App.Preference.AddRepository(path, "");
-            repo.Open();
+            if (!(App.Current.MainWindow as Launcher).GotoRepo(repo)) repo.Open();
         }
 
         /// <summary>