From 03b07fd62e831df2425676005bd962fef81ffc1d Mon Sep 17 00:00:00 2001
From: Po Lu <luangruo@yahoo.com>
Date: Mon, 7 Mar 2022 13:09:07 +0800
Subject: [PATCH] Fix maximum selection size reporting

* src/xselect.c (selection_quantum): Take into account extended
request size.
---
 src/xselect.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/xselect.c b/src/xselect.c
index 979f4549488..a88c15aa95b 100644
--- a/src/xselect.c
+++ b/src/xselect.c
@@ -98,7 +98,11 @@ static void lisp_data_to_selection_data (struct x_display_info *, Lisp_Object,
 static int
 selection_quantum (Display *display)
 {
-  long mrs = XMaxRequestSize (display);
+  long mrs = XExtendedMaxRequestSize (display);
+
+  if (!mrs)
+    mrs = XMaxRequestSize (display);
+
   return (mrs < MAX_SELECTION_QUANTUM / X_LONG_SIZE + 25
 	  ? (mrs - 25) * X_LONG_SIZE
 	  : MAX_SELECTION_QUANTUM);
-- 
2.39.5