bug#71230: [PATCH] Fix C-x C-c do not work in CUA-mode when cua-prefix-override-handler is ni

[Siyuan Chen <chansey97@gmail.com>]

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Currently, cua-mode has a bug i.e. when `(setq
cua-prefix-override-inhibit-delay nil)`, cut and copy do not work.

Also we have to`(setq cua-prefix-override-inhibit-delay nil)`,
otherwise cua-mode will not be able to support fast copy/cut & paste.

More detail information, see emacs-devel
https://lists.gnu.org/archive/html/emacs-devel/2024-05/msg01033.html

P.s. This patch based on the mirror repo
https://github.com/emacs-mirror/emacs
and Tested in Emacs 29.3.

Best regards,
Siyuan Chen

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From 006de6c527c02566185ca4f0e5f5e41175882d68 Mon Sep 17 00:00:00 2001
From: Siyuan Chen <chansey97@gmail.com>
Date: Tue, 28 May 2024 00:29:50 +0800
Subject: [PATCH] Fix the issue when cua--prefix-override-handler is nil C-x
 C-c doesn't work.

Detail see https://lists.gnu.org/archive/html/emacs-devel/2024-05/msg01033.html
---
 lisp/emulation/cua-base.el | 25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/lisp/emulation/cua-base.el b/lisp/emulation/cua-base.el
index fb6a8515d9e..cacd348c315 100644
--- a/lisp/emulation/cua-base.el
+++ b/lisp/emulation/cua-base.el
@@ -699,10 +699,27 @@ Repeating prefix key when region is active works as a single prefix key."
   (interactive)
   (cua--prefix-override-replay 0))
 
-;; These aliases are so that we can look up the commands and find the
-;; correct keys when generating menus.
-(defalias 'cua-cut-handler #'cua--prefix-override-handler)
-(defalias 'cua-copy-handler #'cua--prefix-override-handler)
+;; These two functions are so that we can look up the commands and find the
+;; correct keys when generating menus. Also, when cua--prefix-override-handler
+;; is nil, allow C-x C-c to cut/copy immediately without waiting for
+;; cua--prefix-override-timer to expire.
+(defun cua-cut-handler ()
+  (interactive)
+  (if (or (not (numberp cua-prefix-override-inhibit-delay))
+          (<= cua-prefix-override-inhibit-delay 0))
+      (cond
+       (cua--global-mark-active (cua-cut-to-global-mark))
+       (t (call-interactively 'kill-region)))
+    (cua--prefix-override-handler)))
+
+(defun cua-copy-handler ()
+  (interactive)
+  (if (or (not (numberp cua-prefix-override-inhibit-delay))
+          (<= cua-prefix-override-inhibit-delay 0))
+      (cond
+       (cua--global-mark-active (cua-copy-to-global-mark))
+       (t (call-interactively 'copy-region-as-kill)))
+    (cua--prefix-override-handler)))
 
 (defun cua--prefix-repeat-handler ()
   "Repeating prefix key when region is active works as a single prefix key."
-- 
2.32.0.windows.2