[gtk+/wip/otte/clipboard: 105/107] x11: Handle case where clipboard was reclaimed quickly

[Benjamin Otte <otte src gnome org>]

commit 27e7ec9aaaa8076e42a5a72a8ce947e1fa6e1568
Author: Benjamin Otte <otte redhat com>
Date:   Fri Dec 1 07:42:36 2017 +0100

    x11: Handle case where clipboard was reclaimed quickly
    
    When the reply to a TARGETS request comes in, the clipboard may already
    be reclaimed by the local app. Deal with that case (in an ugly way,
    strictly speaking we should use a cancellable here).
    
    This happens for example at startup when the initial TARGETS requests
    have not been answered until after the main widow popped up. And if such
    a window immediately claims the primary clipboard (like when the initial
    focus is inside an entry), this race will happen.

 gdk/x11/gdkclipboard-x11.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/gdk/x11/gdkclipboard-x11.c b/gdk/x11/gdkclipboard-x11.c
index e81312a..e99f973 100644
--- a/gdk/x11/gdkclipboard-x11.c
+++ b/gdk/x11/gdkclipboard-x11.c
@@ -408,6 +408,15 @@ gdk_x11_clipboard_request_targets_finish (GObject      *source_object,
       g_object_unref (cb);
       return;
     }
+  else if (gdk_clipboard_is_local (GDK_CLIPBOARD (cb)))
+    {
+      /* FIXME: Use a cancellable for this request, so that we don't do he brittle
+       * is_local() check */
+      g_bytes_unref (bytes);
+      g_object_unref (stream);
+      g_object_unref (cb);
+      return;
+    }
 
   print_atoms (cb,
                "received targets",
@@ -421,8 +430,10 @@ gdk_x11_clipboard_request_targets_finish (GObject      *source_object,
   GDK_NOTE(CLIPBOARD, char *s = gdk_content_formats_to_string (formats); g_printerr ("%s: got formats: 
%s\n", cb->selection, s); g_free (s));
 
   /* union with previously loaded formats */
+  formats = gdk_content_formats_union (formats, gdk_clipboard_get_formats (GDK_CLIPBOARD (cb)));
   gdk_clipboard_claim_remote (GDK_CLIPBOARD (cb), formats);
   gdk_content_formats_unref (formats);
+  g_bytes_unref (bytes);
 
   g_input_stream_read_bytes_async (stream,
                                    gdk_x11_display_get_max_request_size (display),