Function: message-change-subject

message-change-subject is an interactive and byte-compiled function defined in message.el.gz.

Signature

(message-change-subject NEW-SUBJECT)

Documentation

Ask for NEW-SUBJECT header, append (was: <Old Subject>).

Key Bindings

Source Code

;; Defined in /usr/src/emacs/lisp/gnus/message.el.gz
;;; Suggested by Jonas Steverud  @  www.dtek.chalmers.se/~d4jonas/

(defun message-change-subject (new-subject)
  "Ask for NEW-SUBJECT header, append (was: <Old Subject>)."
  (interactive
   (list
    (read-from-minibuffer "New subject: "))
   message-mode)
  (cond ((and (not (or (null new-subject) ; new subject not empty
		       (zerop (string-width new-subject))
		       (string-match "^[ \t]*$" new-subject))))
	 (save-excursion
	   (let ((old-subject
		  (save-restriction
		    (message-narrow-to-headers)
		    (message-fetch-field "Subject"))))
	     (cond ((not old-subject)
		    (error "No current subject"))
		   ((not (string-match
			  (concat "^[ \t]*"
				  (regexp-quote new-subject)
				  "[ \t]*$")
			  old-subject))  ; yes, it really is a new subject
		    ;; delete eventual Re: prefix
		    (setq old-subject
			  (message-strip-subject-re old-subject))
		    (message-goto-subject)
		    (message-delete-line)
		    (insert (concat "Subject: "
				    new-subject
				    " (was: "
				    old-subject ")\n")))))))))