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- ;; Handling of disabled commands ("novice mode") for Emacs.
- ;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 1, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to
- ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-
- ;; This function is called (by autoloading)
- ;; to handle any disabled command.
- ;; The command is found in this-command
- ;; and the keys are returned by (this-command-keys).
-
- (defun disabled-command-hook (&rest ignore)
- (let (char)
- (save-window-excursion
- (with-output-to-temp-buffer "*Help*"
- (if (= (aref (this-command-keys) 0) ?\M-x)
- (princ "You have invoked the disabled command ")
- (princ "You have typed ")
- (princ (key-description (this-command-keys)))
- (princ ", invoking disabled command "))
- (princ this-command)
- (princ ":\n")
- ;; Print any special message saying why the command is disabled.
- (if (stringp (get this-command 'disabled))
- (princ (get this-command 'disabled)))
- (princ (or (condition-case ()
- (documentation this-command)
- (error nil))
- "<< not documented >>"))
- ;; Keep only the first paragraph of the documentation.
- (save-excursion
- (set-buffer "*Help*")
- (goto-char (point-min))
- (if (search-forward "\n\n" nil t)
- (delete-region (1- (point)) (point-max))
- (goto-char (point-max))))
- (princ "\n\n")
- (princ "You can now type
- Space to try the command just this once,
- but leave it disabled,
- Y to try it and enable it (no questions if you use it again),
- N to do nothing (command remains disabled)."))
- (message "Type y, n or Space: ")
- (let ((cursor-in-echo-area t))
- (while (not (memq (setq char (downcase (read-char)))
- '(? ?y ?n)))
- (ding)
- (message "Please type y, n or Space: "))))
- (if (= char ?y)
- (if (y-or-n-p "Enable command for future editing sessions also? ")
- (enable-command this-command)
- (put this-command 'disabled nil)))
- (if (/= char ?n)
- (call-interactively this-command))))
-
- (defun enable-command (command)
- "Allow COMMAND to be executed without special confirmation from now on.
- The user's .emacs file is altered so that this will apply
- to future sessions."
- (interactive "CEnable command: ")
- (put command 'disabled nil)
- (save-excursion
- (set-buffer (find-file-noselect (substitute-in-file-name "~/.emacs")))
- (goto-char (point-min))
- (if (search-forward (concat "(put '" (symbol-name command) " ") nil t)
- (delete-region
- (progn (beginning-of-line) (point))
- (progn (forward-line 1) (point)))
- ;; Must have been disabled by default.
- (goto-char (point-max))
- (insert "\n(put '" (symbol-name command) " 'disabled nil)\n"))
- (setq foo (buffer-modified-p))
- (save-buffer)))
-
- (defun disable-command (command)
- "Require special confirmation to execute COMMAND from now on.
- The user's .emacs file is altered so that this will apply
- to future sessions."
- (interactive "CDisable command: ")
- (put command 'disabled t)
- (save-excursion
- (set-buffer (find-file-noselect (substitute-in-file-name "~/.emacs")))
- (goto-char (point-min))
- (if (search-forward (concat "(put '" (symbol-name command) " ") nil t)
- (delete-region
- (progn (beginning-of-line) (point))
- (progn (forward-line 1) (point))))
- (goto-char (point-max))
- (insert "(put '" (symbol-name command) " 'disabled t)\n")
- (save-buffer)))
-
-