From: Po Lu <luangruo@yahoo.com>
Date: Wed, 20 Apr 2022 08:06:06 +0000 (+0800)
Subject: Reset Motif DND protocol numbers when writing targets table
X-Git-Tag: emacs-29.0.90~1931^2~392
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=e4ed7e0ce97528b2130c33326179a10d6133ce92;p=emacs.git

Reset Motif DND protocol numbers when writing targets table

* src/xterm.c (xm_setup_dnd_targets): Set header.protocol to 0
when writing table.
---

diff --git a/src/xterm.c b/src/xterm.c
index 92c8ac09c97..0243b3cf96c 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -1662,9 +1662,17 @@ xm_setup_dnd_targets (struct x_display_info *dpyinfo,
     }
 
   if (!rc)
-    xm_write_targets_table (dpyinfo->display, drag_window,
-			    dpyinfo->Xatom_MOTIF_DRAG_TARGETS,
-			    &header, recs);
+    {
+      /* Some implementations of Motif DND set the protocol version of
+	 just the targets table to 1 without actually changing the
+	 data format.  To avoid confusing Motif when that happens, set
+	 it back to 0.  There will probably be no more updates to the
+	 protocol either.  */
+      header.protocol = 0;
+      xm_write_targets_table (dpyinfo->display, drag_window,
+			      dpyinfo->Xatom_MOTIF_DRAG_TARGETS,
+			      &header, recs);
+    }
 
   XUngrabServer (dpyinfo->display);