lisp/mail/rmailedit.el

   1 ;;; rmailedit.el --- "RMAIL edit mode"  Edit the current message.
   2
   3 ;; Copyright (C) 1985 Free Software Foundation, Inc.
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is free software; you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation; either version 1, or (at your option)
  10 ;; any later version.
  11
  12 ;; GNU Emacs is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  19 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21
  22 (require 'rmail)
  23
  24 (defvar rmail-edit-map nil)
  25 (if rmail-edit-map
  26     nil
  27   (setq rmail-edit-map (nconc (make-sparse-keymap) (cdr text-mode-map)))
  28   (define-key rmail-edit-map "\C-c\C-c" 'rmail-cease-edit)
  29   (define-key rmail-edit-map "\C-c\C-]" 'rmail-abort-edit))
  30
  31 ;; Rmail Edit mode is suitable only for specially formatted data.
  32 (put 'rmail-edit-mode 'mode-class 'special)
  33
  34 (defun rmail-edit-mode ()
  35   "Major mode for editing the contents of an RMAIL message.
  36 The editing commands are the same as in Text mode, together with two commands
  37 to return to regular RMAIL:
  38   *  rmail-abort-edit cancels the changes
  39      you have made and returns to RMAIL
  40   *  rmail-cease-edit makes them permanent.
  41 \\{rmail-edit-map}"
  42   (use-local-map rmail-edit-map)
  43   (setq major-mode 'rmail-edit-mode)
  44   (setq mode-name "RMAIL Edit")
  45   (if (boundp 'mode-line-modified)
  46       (setq mode-line-modified (default-value 'mode-line-modified))
  47     (setq mode-line-format (default-value 'mode-line-format)))
  48   (run-hooks 'text-mode-hook 'rmail-edit-mode-hook))
  49
  50 (defun rmail-edit-current-message ()
  51   "Edit the contents of this message."
  52   (interactive)
  53   (rmail-edit-mode)
  54   (make-local-variable 'rmail-old-text)
  55   (setq rmail-old-text (buffer-substring (point-min) (point-max)))
  56   (setq buffer-read-only nil)
  57   (set-buffer-modified-p (buffer-modified-p))
  58   ;; Make mode line update.
  59   (if (and (eq (key-binding "\C-c\C-c") 'rmail-cease-edit)
  60            (eq (key-binding "\C-c\C-]") 'rmail-abort-edit))
  61       (message "Editing: Type C-c C-c to return to Rmail, C-c C-] to abort")
  62     (message (substitute-command-keys
  63                "Editing: Type \\[rmail-cease-edit] to return to Rmail, \\[rmail-abort-edit] to abort"))))
  64
  65 (defun rmail-cease-edit ()
  66   "Finish editing message; switch back to Rmail proper."
  67   (interactive)
  68   ;; Make sure buffer ends with a newline.
  69   (save-excursion
  70     (goto-char (point-max))
  71     (if (/= (preceding-char) ?\n)
  72         (insert "\n"))
  73     ;; Adjust the marker that points to the end of this message.
  74     (set-marker (aref rmail-message-vector (1+ rmail-current-message))
  75                 (point)))
  76   (let ((old rmail-old-text))
  77     ;; Update the mode line.
  78     (set-buffer-modified-p (buffer-modified-p))
  79     (rmail-mode-1)
  80     (if (and (= (length old) (- (point-max) (point-min)))
  81              (string= old (buffer-substring (point-min) (point-max))))
  82         ()
  83       (setq old nil)
  84       (rmail-set-attribute "edited" t)
  85       (if (boundp 'rmail-summary-vector)
  86           (progn
  87             (aset rmail-summary-vector (1- rmail-current-message) nil)
  88             (save-excursion
  89               (rmail-widen-to-current-msgbeg
  90                 (function (lambda ()
  91                             (forward-line 2)
  92                             (if (looking-at "Summary-line: ")
  93                                 (let ((buffer-read-only nil))
  94                                   (delete-region (point)
  95                                                  (progn (forward-line 1)
  96                                                         (point))))))))
  97               (rmail-show-message))))))
  98   (setq buffer-read-only t))
  99
 100 (defun rmail-abort-edit ()
 101   "Abort edit of current message; restore original contents."
 102   (interactive)
 103   (delete-region (point-min) (point-max))
 104   (insert rmail-old-text)
 105   (rmail-cease-edit))
 106
 107 ;;; rmailedit.el ends here