[gtk+] dnd: Only send DELETE request on X11

[Benjamin Otte <otte src gnome org>]

commit ca5f859dc8134eca53c328eaa35b6d5c1dca1856
Author: Benjamin Otte <otte redhat com>
Date:   Wed Dec 13 23:52:55 2017 +0100

    dnd: Only send DELETE request on X11
    
    This is Xdnd-specific and doesn't need to happen elsewhere.

 gdk/x11/gdkdnd-x11.c |   11 +++++++++++
 gtk/gtkdnd.c         |   21 +--------------------
 2 files changed, 12 insertions(+), 20 deletions(-)
---
diff --git a/gdk/x11/gdkdnd-x11.c b/gdk/x11/gdkdnd-x11.c
index 618630a..9bbd701 100644
--- a/gdk/x11/gdkdnd-x11.c
+++ b/gdk/x11/gdkdnd-x11.c
@@ -2523,6 +2523,17 @@ gdk_x11_drag_context_drop_finish (GdkDragContext *context,
       GdkDisplay *display = GDK_WINDOW_DISPLAY (context->source_window);
       XEvent xev;
 
+      if (success && gdk_drag_context_get_selected_action (context) == GDK_ACTION_MOVE)
+        {
+          XConvertSelection (GDK_DISPLAY_XDISPLAY (display),
+                             gdk_x11_get_xatom_by_name_for_display (display, "XdndSelection"),
+                             gdk_x11_get_xatom_by_name_for_display (display, "DELETE"),
+                             gdk_x11_get_xatom_by_name_for_display (display, "GDK_SELECTION"),
+                             GDK_WINDOW_XID (context->source_window),
+                             time);
+          /* XXX: Do we need to wait for a reply here before sending the next message? */
+        }
+
       xev.xclient.type = ClientMessage;
       xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndFinished");
       xev.xclient.format = 32;
diff --git a/gtk/gtkdnd.c b/gtk/gtkdnd.c
index 3a1fcad..231156f 100644
--- a/gtk/gtkdnd.c
+++ b/gtk/gtkdnd.c
@@ -448,26 +448,7 @@ gtk_drag_finish (GdkDragContext *context,
 {
   g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
 
-  if (success && gdk_drag_context_get_selected_action (context) == GDK_ACTION_MOVE)
-    {
-      GtkWidget *selection_widget = gtk_drag_get_ipc_widget_for_display (gdk_window_get_display 
(gdk_drag_context_get_source_window (context)));
-
-      g_object_ref (context);
-      
-      g_object_set_data (G_OBJECT (selection_widget), I_("drag-context"), context);
-      g_signal_connect (selection_widget, "selection-received",
-                        G_CALLBACK (gtk_drag_selection_received),
-                        NULL);
-      
-      gtk_selection_convert (selection_widget,
-                             gdk_drag_get_selection (context),
-                             gdk_atom_intern_static_string ("DELETE"),
-                             time);
-    }
-  else
-    {
-      gdk_drop_finish (context, success, time);
-    }
+  gdk_drop_finish (context, success, time);
 }
 
 /**