From: Po Lu <luangruo@yahoo.com>
Date: Thu, 17 Mar 2022 09:41:41 +0000 (+0800)
Subject: Prevent invisible frames from acting as drag sources
X-Git-Tag: emacs-29.0.90~1931^2~1074
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=140d7cc9cbb9da0a2494110105909b1cb8c92998;p=emacs.git

Prevent invisible frames from acting as drag sources

* src/xterm.c (x_dnd_begin_drag_and_drop): Error out if f is
invisible.  It makes no sense for an invisible frame to be a
drag source, so the function just hangs.
---

diff --git a/src/xterm.c b/src/xterm.c
index 1b0b3ef793f..6485374e2ae 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -1093,6 +1093,9 @@ x_dnd_begin_drag_and_drop (struct frame *f, Time time, Atom xaction,
   char *atom_name;
   Lisp_Object action, ltimestamp;
 
+  if (!FRAME_VISIBLE_P (f))
+    error ("Frame is invisible");
+
   if (x_dnd_in_progress)
     error ("A drag-and-drop session is already in progress");