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Annotation of GNUtools/emacs/lisp/novice.el, revision 1.1

1.1     ! root        1: ;; Handling of disabled commands ("novice mode") for Emacs.
        !             2: ;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
        !             3: 
        !             4: ;; This file is part of GNU Emacs.
        !             5: 
        !             6: ;; GNU Emacs is free software; you can redistribute it and/or modify
        !             7: ;; it under the terms of the GNU General Public License as published by
        !             8: ;; the Free Software Foundation; either version 1, or (at your option)
        !             9: ;; any later version.
        !            10: 
        !            11: ;; GNU Emacs is distributed in the hope that it will be useful,
        !            12: ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14: ;; GNU General Public License for more details.
        !            15: 
        !            16: ;; You should have received a copy of the GNU General Public License
        !            17: ;; along with GNU Emacs; see the file COPYING.  If not, write to
        !            18: ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
        !            19: 
        !            20: 
        !            21: ;; This function is called (by autoloading)
        !            22: ;; to handle any disabled command.
        !            23: ;; The command is found in this-command
        !            24: ;; and the keys are returned by (this-command-keys).
        !            25: 
        !            26: (defun disabled-command-hook (&rest ignore)
        !            27:   (let (char)
        !            28:     (save-window-excursion
        !            29:      (with-output-to-temp-buffer "*Help*"
        !            30:        (if (= (aref (this-command-keys) 0) ?\M-x)
        !            31:           (princ "You have invoked the disabled command ")
        !            32:         (princ "You have typed ")
        !            33:         (princ (key-description (this-command-keys)))
        !            34:         (princ ", invoking disabled command "))
        !            35:        (princ this-command)
        !            36:        (princ ":\n")
        !            37:        ;; Print any special message saying why the command is disabled.
        !            38:        (if (stringp (get this-command 'disabled))
        !            39:           (princ (get this-command 'disabled)))
        !            40:        (princ (or (condition-case ()
        !            41:                      (documentation this-command)
        !            42:                    (error nil))
        !            43:                  "<< not documented >>"))
        !            44:        ;; Keep only the first paragraph of the documentation.
        !            45:        (save-excursion
        !            46:         (set-buffer "*Help*")
        !            47:         (goto-char (point-min))
        !            48:         (if (search-forward "\n\n" nil t)
        !            49:             (delete-region (1- (point)) (point-max))
        !            50:           (goto-char (point-max))))
        !            51:        (princ "\n\n")
        !            52:        (princ "You can now type
        !            53: Space to try the command just this once,
        !            54:       but leave it disabled,
        !            55: Y to try it and enable it (no questions if you use it again),
        !            56: N to do nothing (command remains disabled)."))
        !            57:      (message "Type y, n or Space: ")
        !            58:      (let ((cursor-in-echo-area t))
        !            59:        (while (not (memq (setq char (downcase (read-char)))
        !            60:                         '(?  ?y ?n)))
        !            61:         (ding)
        !            62:         (message "Please type y, n or Space: "))))
        !            63:     (if (= char ?y)
        !            64:        (if (y-or-n-p "Enable command for future editing sessions also? ")
        !            65:            (enable-command this-command)
        !            66:          (put this-command 'disabled nil)))
        !            67:     (if (/= char ?n)
        !            68:        (call-interactively this-command))))
        !            69: 
        !            70: (defun enable-command (command)
        !            71:   "Allow COMMAND to be executed without special confirmation from now on.
        !            72: The user's .emacs file is altered so that this will apply
        !            73: to future sessions."
        !            74:   (interactive "CEnable command: ")
        !            75:   (put command 'disabled nil)
        !            76:   (save-excursion
        !            77:    (set-buffer (find-file-noselect (substitute-in-file-name "~/.emacs")))
        !            78:    (goto-char (point-min))
        !            79:    (if (search-forward (concat "(put '" (symbol-name command) " ") nil t)
        !            80:        (delete-region
        !            81:        (progn (beginning-of-line) (point))
        !            82:        (progn (forward-line 1) (point)))
        !            83:      ;; Must have been disabled by default.
        !            84:      (goto-char (point-max))
        !            85:      (insert "\n(put '" (symbol-name command) " 'disabled nil)\n"))
        !            86:    (setq foo (buffer-modified-p))
        !            87:    (save-buffer)))
        !            88: 
        !            89: (defun disable-command (command)
        !            90:   "Require special confirmation to execute COMMAND from now on.
        !            91: The user's .emacs file is altered so that this will apply
        !            92: to future sessions."
        !            93:   (interactive "CDisable command: ")
        !            94:   (put command 'disabled t)
        !            95:   (save-excursion
        !            96:    (set-buffer (find-file-noselect (substitute-in-file-name "~/.emacs")))
        !            97:    (goto-char (point-min))
        !            98:    (if (search-forward (concat "(put '" (symbol-name command) " ") nil t)
        !            99:        (delete-region
        !           100:        (progn (beginning-of-line) (point))
        !           101:        (progn (forward-line 1) (point))))
        !           102:    (goto-char (point-max))
        !           103:    (insert "(put '" (symbol-name command) " 'disabled t)\n")
        !           104:    (save-buffer)))
        !           105: 

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