use real data formats while storing atoms early

src/Avalonia.X11/X11Clipboard.cs

@@ -82,18 +82,9 @@ namespace Avalonia.X11
                 Encoding textEnc;
                 if (target == _x11.Atoms.TARGETS)
                 {
-                    var atoms = new HashSet<IntPtr> { _x11.Atoms.TARGETS, _x11.Atoms.MULTIPLE };
-                    foreach (var fmt in _storedDataObject.GetDataFormats())
-                    {
-                        if (fmt == DataFormats.Text)
-                            foreach (var ta in _textAtoms)
-                                atoms.Add(ta);
-                        else
-                            atoms.Add(_x11.Atoms.GetAtom(fmt));
-                    }
-
+                    var atoms = ConvertDataObject(_storedDataObject);
                     XChangeProperty(_x11.Display, window, property,
-                        _x11.Atoms.XA_ATOM, 32, PropertyMode.Replace, atoms.ToArray(), atoms.Count);
+                        _x11.Atoms.XA_ATOM, 32, PropertyMode.Replace, atoms, atoms.Length);
                     return property;
                 }
                 else if(target == _x11.Atoms.SAVE_TARGETS && _x11.Atoms.SAVE_TARGETS != IntPtr.Zero)
@@ -252,13 +243,29 @@ namespace Avalonia.X11
             return (string)await SendDataRequest(target);
         }
 
-        private void StoreAtomsInClipboardManager(IntPtr[] atoms)
+
+        private IntPtr[] ConvertDataObject(IDataObject data)
+        {
+            var atoms = new HashSet<IntPtr> { _x11.Atoms.TARGETS, _x11.Atoms.MULTIPLE };
+            foreach (var fmt in data.GetDataFormats())
+            {
+                if (fmt == DataFormats.Text)
+                    foreach (var ta in _textAtoms)
+                        atoms.Add(ta);
+                else
+                    atoms.Add(_x11.Atoms.GetAtom(fmt));
+            }
+            return atoms.ToArray();
+        }
+
+        private void StoreAtomsInClipboardManager(IDataObject data)
         {
             if (_x11.Atoms.CLIPBOARD_MANAGER != IntPtr.Zero && _x11.Atoms.SAVE_TARGETS != IntPtr.Zero)
             {
                 var clipboardManager = XGetSelectionOwner(_x11.Display, _x11.Atoms.CLIPBOARD_MANAGER);
                 if (clipboardManager != IntPtr.Zero)
-                {
+                {                    
+                    var atoms = ConvertDataObject(data);
                     XChangeProperty(_x11.Display, _handle, _avaloniaSaveTargetsAtom, _x11.Atoms.XA_ATOM, 32,
                         PropertyMode.Replace,
                         atoms, atoms.Length);
@@ -283,8 +290,8 @@ namespace Avalonia.X11
         public Task SetDataObjectAsync(IDataObject data)
         {
             _storedDataObject = data;
-            XSetSelectionOwner(_x11.Display, _x11.Atoms.CLIPBOARD, _handle, IntPtr.Zero);
-            StoreAtomsInClipboardManager(_textAtoms);
+            XSetSelectionOwner(_x11.Display, _x11.Atoms.CLIPBOARD, _handle, IntPtr.Zero);            
+            StoreAtomsInClipboardManager(data);
             return Task.CompletedTask;
         }