From ee27a6bdc31bdbc68ec6f0200f5e530c0698a832 Mon Sep 17 00:00:00 2001
From: libgenapps <33476799+libgenapps@users.noreply.github.com>
Date: Mon, 1 Jan 2018 17:52:18 +0300
Subject: [PATCH] Clipboard operation retry, global exception handlers

---
 App.xaml.cs                                   | 27 ++++++++++++++++++-
 Infrastructure/WindowManager.cs               |  5 ++++
 ViewModels/ErrorWindowViewModel.cs            |  2 +-
 .../Controls/BookAttributeValueLabel.xaml.cs  |  3 ++-
 4 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/App.xaml.cs b/App.xaml.cs
index 0c57ac0..04531d6 100644
--- a/App.xaml.cs
+++ b/App.xaml.cs
@@ -1,4 +1,6 @@
-using System.Windows;
+using System;
+using System.Threading.Tasks;
+using System.Windows;
 using LibgenDesktop.Infrastructure;
 using LibgenDesktop.Models;
 using LibgenDesktop.ViewModels;
@@ -10,6 +12,7 @@ public partial class App : Application
         protected override void OnStartup(StartupEventArgs e)
         {
             base.OnStartup(e);
+            SetupExceptionHandlers();
             MainModel mainModel = new MainModel();
             if (mainModel.LocalDatabaseStatus == MainModel.DatabaseStatus.OPENED)
             {
@@ -43,5 +46,27 @@ private void ShowCreateDatabaseWindow(MainModel mainModel)
                 Shutdown();
             }
         }
+
+        private void SetupExceptionHandlers()
+        {
+            AppDomain.CurrentDomain.UnhandledException += (sender, e) => ShowErrorWindow(e.ExceptionObject as Exception);
+            DispatcherUnhandledException += (sender, e) =>
+            {
+                ShowErrorWindow(e.Exception);
+                e.Handled = true;
+            };
+            TaskScheduler.UnobservedTaskException += (sender, e) =>
+            {
+                ShowErrorWindow(e.Exception);
+                e.SetObserved();
+            };
+        }
+
+        private void ShowErrorWindow(Exception exception)
+        {
+            ErrorWindowViewModel errorWindowViewModel = new ErrorWindowViewModel(exception?.ToString() ?? "(null)");
+            IWindowContext errorWindowContext = WindowManager.CreateWindow(RegisteredWindows.WindowKey.ERROR_WINDOW, errorWindowViewModel);
+            errorWindowContext.ShowDialog();
+        }
     }
 }
diff --git a/Infrastructure/WindowManager.cs b/Infrastructure/WindowManager.cs
index 258060a..1106475 100644
--- a/Infrastructure/WindowManager.cs
+++ b/Infrastructure/WindowManager.cs
@@ -166,6 +166,11 @@ public static void RemoveWindowIcon(Window window)
             SetWindowPos(windowHandle, IntPtr.Zero, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
         }
 
+        public static void SetClipboardText(string text)
+        {
+            Clipboard.SetDataObject(text);
+        }
+
         private static void RemoveWindowStyle(Window window, int styleAttribute)
         {
             IntPtr windowHandle = new WindowInteropHelper(window).Handle;
diff --git a/ViewModels/ErrorWindowViewModel.cs b/ViewModels/ErrorWindowViewModel.cs
index 7caf529..93c639f 100644
--- a/ViewModels/ErrorWindowViewModel.cs
+++ b/ViewModels/ErrorWindowViewModel.cs
@@ -17,7 +17,7 @@ public ErrorWindowViewModel(string error)
 
         private void CopyErrorToClipboard()
         {
-            Clipboard.SetText(Error);
+            WindowManager.SetClipboardText(Error);
         }
     }
 }
diff --git a/Views/Controls/BookAttributeValueLabel.xaml.cs b/Views/Controls/BookAttributeValueLabel.xaml.cs
index f77ae87..e02525a 100644
--- a/Views/Controls/BookAttributeValueLabel.xaml.cs
+++ b/Views/Controls/BookAttributeValueLabel.xaml.cs
@@ -2,6 +2,7 @@
 using System.ComponentModel;
 using System.Windows;
 using System.Windows.Controls;
+using LibgenDesktop.Infrastructure;
 
 namespace LibgenDesktop.Views.Controls
 {
@@ -16,7 +17,7 @@ public BookAttributeValueLabel()
 
         private void CopyMenuItemClick(object sender, RoutedEventArgs e)
         {
-            Clipboard.SetText(Text);
+            WindowManager.SetClipboardText(Text);
         }
 
         private void TextChanged(object sender, EventArgs e)