From: Po Lu <luangruo@yahoo.com>
Date: Tue, 24 May 2022 00:30:51 +0000 (+0800)
Subject: Only send fallback MONITORS_CHANGED_EVENT when dimensions really changed
X-Git-Tag: emacs-29.0.90~1910^2~474
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=689be0bdd5ba0a619fd97c435f75d43c15b164e2;p=emacs.git

Only send fallback MONITORS_CHANGED_EVENT when dimensions really changed

* src/xterm.c (handle_one_xevent): Test that root window
configure width and height are not the same as the previously
recorded ones.
---

diff --git a/src/xterm.c b/src/xterm.c
index dc1daaf6e19..f86ec0fad39 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -16657,13 +16657,17 @@ handle_one_xevent (struct x_display_info *dpyinfo,
 	  /* Catch screen size changes even if RandR is not available
 	     on the client.  GTK does this internally.  */
 
-	  inev.ie.kind = MONITORS_CHANGED_EVENT;
-	  XSETTERMINAL (inev.ie.arg, dpyinfo->terminal);
+	  if (configureEvent.xconfigure.width != dpyinfo->screen_width
+	      || configureEvent.xconfigure.height != dpyinfo->screen_height)
+	    {
+	      inev.ie.kind = MONITORS_CHANGED_EVENT;
+	      XSETTERMINAL (inev.ie.arg, dpyinfo->terminal);
 
-	  /* Store this event now since inev.ie.type could be set to
-	     MOVE_FRAME_EVENT later.  */
-	  kbd_buffer_store_event (&inev.ie);
-	  inev.ie.kind = NO_EVENT;
+	      /* Store this event now since inev.ie.type could be set to
+		 MOVE_FRAME_EVENT later.  */
+	      kbd_buffer_store_event (&inev.ie);
+	      inev.ie.kind = NO_EVENT;
+	    }
 #endif
 
 	  dpyinfo->screen_width = configureEvent.xconfigure.width;