Creating a new desktop app with avaloniaui

v2rayN/v2rayN.Desktop/Common/AvaUtils.cs

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+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Input;
+using Avalonia.Media.Imaging;
+using Avalonia.Platform;
+using System.Reflection;
+
+namespace v2rayN.Desktop.Common
+{
+    internal class AvaUtils
+    {
+        public static async Task<string?> GetClipboardData(Window owner)
+        {
+            try
+            {
+                var clipboard = TopLevel.GetTopLevel(owner)?.Clipboard;
+                if (clipboard == null) return null;
+                return await clipboard.GetTextAsync();
+            }
+            catch
+            {
+                return null;
+            }
+        }
+
+        public static async Task SetClipboardData(Visual? visual, string strData)
+        {
+            try
+            {
+                var clipboard = TopLevel.GetTopLevel(visual)?.Clipboard;
+                if (clipboard == null) return;
+                var dataObject = new DataObject();
+                dataObject.Set(DataFormats.Text, strData);
+                await clipboard.SetDataObjectAsync(dataObject);
+            }
+            catch
+            {
+            }
+        }
+
+        public static WindowIcon GetAppIcon(ESysProxyType sysProxyType)
+        {
+            int index = 1;
+            switch (sysProxyType)
+            {
+                case ESysProxyType.ForcedClear:
+                    index = 1;
+                    break;
+
+                case ESysProxyType.ForcedChange:
+                case ESysProxyType.Pac:
+                    index = 2;
+                    break;
+
+                case ESysProxyType.Unchanged:
+                    index = 3;
+                    break;
+            }
+            var uri = new Uri($"avares://{Assembly.GetExecutingAssembly().GetName().Name}/Assets/NotifyIcon{index}.ico");
+            using var bitmap = new Bitmap(AssetLoader.Open(uri));
+            return new(bitmap);
+        }
+    }
+}