show update log after upgraded

QuickLook/App.xaml.cs

@@ -94,6 +94,8 @@ namespace QuickLook
             if (!Settings.Default.Upgraded)
                 return;
 
+            Updater.CollectAndShowReleaseNotes();
+
             Settings.Default.Upgrade();
             Settings.Default.Upgraded = false;
             Settings.Default.Save();

QuickLook/Helpers/Updater.cs

@@ -38,15 +38,10 @@ namespace QuickLook.Helpers
             {
                 try
                 {
-                    var web = new WebClientEx(15 * 1000);
+                    var json = DownloadJson("https://api.github.com/repos/xupefei/QuickLook/releases/latest");
-                    web.Headers.Add(HttpRequestHeader.UserAgent, "Wget/1.9.1");
 
-                    var response = web.DownloadDataStream("https://api.github.com/repos/xupefei/QuickLook/releases");
+                    var nVersion = (string) json["tag_name"];
-
+                    //nVersion = "9.2.1";
-                    var json = JsonConvert.DeserializeObject<dynamic>(new StreamReader(response).ReadToEnd());
-
-                    var nVersion = (string) json[0]["tag_name"];
-                    //nVersion = "0.2.1";
 
                     if (new Version(nVersion) <= Assembly.GetExecutingAssembly().GetName().Version)
                     {
@@ -57,15 +52,11 @@ namespace QuickLook.Helpers
                         return;
                     }
 
-                    string notes = CollectReleaseNotes(json);
+                    CollectAndShowReleaseNotes();
-
-                    var changeLogPath = Path.GetTempFileName() + ".md";
-                    File.WriteAllText(changeLogPath, notes);
 
                     Application.Current.Dispatcher.Invoke(
                         () =>
                         {
-                            ViewWindowManager.GetInstance().InvokeViewer(changeLogPath);
                             TrayIconManager.GetInstance().ShowNotification("",
                                 string.Format(TranslationHelper.GetString("Update_Found"), nVersion),
                                 timeout: 20000,
@@ -84,17 +75,48 @@ namespace QuickLook.Helpers
             });
         }
 
-        private static string CollectReleaseNotes(dynamic json)
+        public static void CollectAndShowReleaseNotes()
         {
-            var notes = string.Empty;
+            Task.Run(() =>
-
-            foreach (var item in json)
             {
-                notes += $"# {item["name"]}\r\n\r\n";
+                try
-                notes += item["body"] + "\r\n\r\n";
+                {
-            }
+                    var json = DownloadJson("https://api.github.com/repos/xupefei/QuickLook/releases");
 
-            return notes;
+                    var notes = string.Empty;
+
+                    foreach (var item in json)
+                    {
+                        notes += $"# {item["name"]}\r\n\r\n";
+                        notes += item["body"] + "\r\n\r\n";
+                    }
+
+                    var changeLogPath = Path.GetTempFileName() + ".md";
+                    File.WriteAllText(changeLogPath, notes);
+
+                    Application.Current.Dispatcher.Invoke(() => ViewWindowManager.GetInstance()
+                        .InvokeViewer(changeLogPath));
+                }
+                catch (Exception e)
+                {
+                    Debug.WriteLine(e.Message);
+                    Application.Current.Dispatcher.Invoke(
+                        () => TrayIconManager.GetInstance().ShowNotification("",
+                            string.Format(TranslationHelper.GetString("Update_Error"), e.Message)));
+                }
+            });
+        }
+
+        private static dynamic DownloadJson(string url)
+        {
+            var web = new WebClientEx(15 * 1000);
+            web.Headers.Add(HttpRequestHeader.UserAgent, "Wget/1.9.1");
+
+            var response =
+                web.DownloadDataStream(url);
+
+            var json = JsonConvert.DeserializeObject<dynamic>(new StreamReader(response).ReadToEnd());
+            return json;
         }
     }
 }

QuickLook/ViewWindowManager.cs

@@ -30,13 +30,13 @@ namespace QuickLook
     internal class ViewWindowManager : IDisposable
     {
         private static ViewWindowManager _instance;
-
-        private MainWindowNoTransparent _viewWindowNoTransparent;
-        private MainWindowTransparent _viewWindowTransparent;
         private MainWindowTransparent _currentMainWindow;
 
         private string _path = string.Empty;
 
+        private MainWindowNoTransparent _viewWindowNoTransparent;
+        private MainWindowTransparent _viewWindowTransparent;
+
         internal ViewWindowManager()
         {
             _viewWindowTransparent = new MainWindowTransparent();
@@ -148,11 +148,11 @@ namespace QuickLook
             if (e.FocusedFile == _path)
                 return;
 
-            Debug.WriteLine($"SwitchPreviewRemoteInvoke: {e.FocusedFile}");
-
             if (string.IsNullOrEmpty(e.FocusedFile))
                 return;
 
+            Debug.WriteLine($"SwitchPreviewRemoteInvoke: {e.FocusedFile}");
+
             _currentMainWindow?.Dispatcher.BeginInvoke(new Action(SwitchPreview), DispatcherPriority.ApplicationIdle);
         }
 
@@ -173,13 +173,13 @@ namespace QuickLook
                 FocusMonitor.GetInstance().Heartbeat -= SwitchPreviewRemoteInvoke;
             }
         }
-        
+
         internal void ForgetCurrentWindow()
         {
             StopFocusMonitor();
 
             if (ReferenceEquals(_currentMainWindow, _viewWindowTransparent))
-                _viewWindowTransparent=new MainWindowTransparent();
+                _viewWindowTransparent = new MainWindowTransparent();
             else
                 _viewWindowNoTransparent = new MainWindowNoTransparent();
 
@@ -188,7 +188,7 @@ namespace QuickLook
 
         internal bool InvokeViewer(string path = null, bool closeIfSame = false)
         {
-            if(closeIfSame)
+            if (closeIfSame)
                 if (_currentMainWindow.Visibility == Visibility.Visible && path == _path)
                 {
                     ClosePreview();
@@ -223,7 +223,7 @@ namespace QuickLook
                 : _viewWindowNoTransparent;
             if (!ReferenceEquals(oldWindow, _currentMainWindow))
                 oldWindow.BeginHide();
-            
+
             _currentMainWindow.BeginShow(matchedPlugin, _path, CurrentPluginFailed);
         }