Don't wait for visible frames to become visible

For discussion, see thread starting at
https://lists.gnu.org/archive/html/emacs-devel/2018-03/msg00807.html.
* src/xterm.c (x_make_frame_visible): Check FRAME_VISIBLE_P before
calling x_wait_for_event.

(cherry picked from commits 2a192e21cf3b04b7f830b4971c1508c611e13a3c
and 00c1f771f2a51ffa675ec5a07ea330f2605cd302)

diff --git a/src/xterm.c b/src/xterm.c
index f6f2079ec694da89be641c91114132d06651ee30..496effaf42a670c14b581303d020db91aa27b205 100644 (file)
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -11548,7 +11548,8 @@ x_make_frame_visible (struct frame *f)
     poll_for_input_1 ();
     poll_suppress_count = old_poll_suppress_count;
 #endif
-    x_wait_for_event (f, MapNotify);
+    if (! FRAME_VISIBLE_P (f))
+      x_wait_for_event (f, MapNotify);
   }
 }