feature<Launcher>: finish restore opened tabs

src/ViewModels/Launcher.cs

@@ -21,6 +21,27 @@ namespace SourceGit.ViewModels {
         public Launcher() {
             Pages = new AvaloniaList<LauncherPage>();
             AddNewTab();
+
+            if (Preference.Instance.RestoreTabs) {
+                foreach (var id in Preference.Instance.OpenedTabs) {
+                    var node = Preference.FindNode(id);
+                    if (node == null) continue;
+
+                    OpenRepositoryInTab(node, null);
+                }
+            }
+        }
+
+        public void Quit() {
+            Preference.Instance.OpenedTabs.Clear();
+
+            if (Preference.Instance.RestoreTabs) {
+                foreach (var page in Pages) {
+                    if (page.Node.IsRepository) Preference.Instance.OpenedTabs.Add(page.Node.Id);
+                }
+            }
+
+            Preference.Save();
         }
 
         public void AddNewTab() {
@@ -130,6 +151,7 @@ namespace SourceGit.ViewModels {
                     page = new LauncherPage(node, repo);
                     Pages.Add(page);
                 } else {
+                    page = ActivePage;
                     page.Node = node;
                     page.View = new Views.Repository() { DataContext = repo };
                 }

src/ViewModels/Preference.cs

@@ -158,6 +158,11 @@ namespace SourceGit.ViewModels {
             set => SetProperty(ref _repositoryNodes, value);
         }
 
+        public List<string> OpenedTabs {
+            get;
+            set;
+        } = new List<string>();
+
         public static void AddNode(RepositoryNode node, RepositoryNode to = null) {
             var collection = to == null ? _instance._repositoryNodes : to.SubNodes;
             var list = new List<RepositoryNode>();
@@ -177,6 +182,10 @@ namespace SourceGit.ViewModels {
             }
         }
 
+        public static RepositoryNode FindNode(string id) {
+            return FindNodeRecursive(id, _instance.RepositoryNodes);
+        }
+
         public static void MoveNode(RepositoryNode node, RepositoryNode to = null) {
             if (to == null && _instance._repositoryNodes.Contains(node)) return;
             if (to != null && to.SubNodes.Contains(node)) return;
@@ -222,6 +231,17 @@ namespace SourceGit.ViewModels {
             File.WriteAllText(_savePath, data);
         }
 
+        private static RepositoryNode FindNodeRecursive(string id, AvaloniaList<RepositoryNode> collection) {
+            foreach (var node in collection) {
+                if (node.Id == id) return node;
+
+                var sub = FindNodeRecursive(id, node.SubNodes);
+                if (sub != null) return sub;
+            }
+
+            return null;
+        }
+
         private static bool RemoveNodeRecursive(RepositoryNode node, AvaloniaList<RepositoryNode> collection) {
             if (collection.Contains(node)) {
                 collection.Remove(node);

src/Views/Launcher.axaml.cs

@@ -43,7 +43,9 @@ namespace SourceGit.Views {
         }
 
         protected override void OnClosing(WindowClosingEventArgs e) {
-            ViewModels.Preference.Save();
+            var vm = DataContext as ViewModels.Launcher;
+            vm.Quit();
+
             base.OnClosing(e);
         }