From: Po Lu <luangruo@yahoo.com>
Date: Sun, 5 Jun 2022 05:03:55 +0000 (+0800)
Subject: Fix bug#55779
X-Git-Tag: emacs-29.0.90~1910^2~225
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=e4725ab688f0c64f79312b32ce6fb3bc7f0b4b51;p=emacs.git

Fix bug#55779

* src/xterm.c (x_update_opaque_region): Don't make GTK reset the
opaque region if F is a child frame.
---

diff --git a/src/xterm.c b/src/xterm.c
index 3b60dba69bd..a6ef2bfd159 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -4349,11 +4349,16 @@ x_update_opaque_region (struct frame *f, XEvent *configure)
 		     (unsigned char *) &opaque_region, 4);
   else
     {
-      object_class = G_OBJECT_GET_CLASS (FRAME_GTK_OUTER_WIDGET (f));
-      class = GTK_WIDGET_CLASS (object_class);
+      /* This causes child frames to not update correctly for an
+	 unknown reason.  (bug#55779) */
+      if (!FRAME_PARENT_FRAME (f))
+	{
+	  object_class = G_OBJECT_GET_CLASS (FRAME_GTK_OUTER_WIDGET (f));
+	  class = GTK_WIDGET_CLASS (object_class);
 
-      if (class->style_updated)
-	class->style_updated (FRAME_GTK_OUTER_WIDGET (f));
+	  if (class->style_updated)
+	    class->style_updated (FRAME_GTK_OUTER_WIDGET (f));
+	}
     }
 #endif
   unblock_input ();