Fix clipboard request on macOS for yank-media

'yank-media' makes a request with 'CLIPBOARD and 'TARGETS, which on
other platforms returns the type(s) of the current selection, but on
macOS returned the selection itself.  Make it return the types instead.

This fixes (Bug#71377).

* src/nsselect.m (ns_get_local_selection): Return nil when called with
QCLIPBOARD and QTARGETS, so that 'ns_get_foreign_selection' is called to
return the type(s) of the selection.

(cherry picked from commit 275a5582414c2f63bccce896200b4e84f1ba0d75)

diff --git a/src/nsselect.m b/src/nsselect.m
index bb6679cd2ab8ebc946346fd82d38543a7d4a433b..be52609e21ccd5b41dba3bbe5f4b879c718cb9b4 100644 (file)
--- a/src/nsselect.m
+++ b/src/nsselect.m
@@ -205,6 +205,14 @@ ns_get_local_selection (Lisp_Object selection_name,
                         Lisp_Object target_type)
 {
   Lisp_Object local_value;
+  /* `yank-media' uses this combination to figure out what the
+     available types of the selection are.  Return nil here so that
+     ns_get_foreign_selection ends up being called to do that
+     (Bug#71377).  */
+  if (EQ (selection_name, QCLIPBOARD)
+      && EQ (target_type, QTARGETS))
+    return Qnil;
+
   local_value = assq_no_quit (selection_name, Vselection_alist);
   return local_value;
 }