From edbb5d8965bf6b84f6717147a3fcfe494374bd6d Mon Sep 17 00:00:00 2001
From: yamaoka <yamaoka>
Date: Wed, 7 Oct 1998 23:17:39 +0000
Subject: [PATCH] 	* lisp/message.el (message-kill-buffer): Refer to 
 `message-kill-buffer-query-function'. 	* lisp/message.el
 (message-kill-buffer-query-function): New user 
 option. 	* lisp/nnheader.el (nnheader-Y-or-n-p): New
 function.

---
 lisp/message.el  |   16 ++++++++++++++--
 lisp/nnheader.el |   14 ++++++++++++++
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/lisp/message.el b/lisp/message.el
index 1e1ac50..4487c32 100644
--- a/lisp/message.el
+++ b/lisp/message.el
@@ -271,6 +271,15 @@ should return the new buffer name."
   :group 'message-buffers
   :type 'boolean)
 
+(defcustom message-kill-buffer-query-function 'yes-or-no-p
+  "*A function called to query the user whether to kill buffer anyway or not.
+If it is t, the buffer will be killed peremptorily."
+  :type '(radio (function-item yes-or-no-p)
+		(function-item y-or-n-p)
+		(function-item nnheader-Y-or-n-p)
+		(function :tag "Other" t))
+  :group 'message-buffers)
+
 (defvar gnus-local-organization)
 (defcustom message-user-organization
   (or (and (boundp 'gnus-local-organization)
@@ -1932,14 +1941,17 @@ The text will also be indented the normal way."
   "Kill the current buffer."
   (interactive)
   (when (or (not (buffer-modified-p))
-	    (yes-or-no-p "Message modified; kill anyway? "))
+	    (eq t message-kill-buffer-query-function)
+	    (funcall message-kill-buffer-query-function
+		     "The buffer modified; kill anyway? "))
     (let ((actions message-kill-actions)
 	  (frame (selected-frame))
 	  (org-frame message-original-frame))
       (setq buffer-file-name nil)
       (kill-buffer (current-buffer))
       (message-do-actions actions)
-      (message-delete-frame frame org-frame))))
+      (message-delete-frame frame org-frame)))
+  (message ""))
 
 (defun message-delete-frame (frame org-frame)
   "Delete frame for editing message."
diff --git a/lisp/nnheader.el b/lisp/nnheader.el
index bc725b6..4c220ba 100644
--- a/lisp/nnheader.el
+++ b/lisp/nnheader.el
@@ -856,6 +856,20 @@ find-file-hooks, etc.
 (fset 'nnheader-cancel-timer 'cancel-timer)
 (fset 'nnheader-cancel-function-timers 'cancel-function-timers)
 
+(defun nnheader-Y-or-n-p (prompt)
+  "Ask user a \"Y/n\" question. Return t if answer is neither \"n\", \"N\" nor \"C-g\"."
+  (if (and (featurep 'xemacs) (should-use-dialog-box-p))
+      (yes-or-no-p-dialog-box prompt)
+    (let ((cursor-in-echo-area t)
+	  (echo-keystrokes 0)
+	  (log-message-max-size 0)
+	  (inhibit-quit t)
+	  message-log-max ans)
+      (while (not (memq ans '(?\  ?N ?Y ?\C-g ?\e ?\n ?\r ?n ?y)))
+	(message "%s(Y/n) " prompt)
+	(setq ans (read-char-exclusive)))
+      (not (memq ans '(?\C-g ?N ?n))))))
+
 (when (string-match "XEmacs\\|Lucid" emacs-version)
   (require 'nnheaderxm))
 
-- 
1.7.10.4