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Annotation of 43BSDReno/contrib/emacs-18.55/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 distributed in the hope that it will be useful,
        !             7: ;; but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: ;; accepts responsibility to anyone for the consequences of using it
        !             9: ;; or for whether it serves any particular purpose or works at all,
        !            10: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
        !            11: ;; License for full details.
        !            12: 
        !            13: ;; Everyone is granted permission to copy, modify and redistribute
        !            14: ;; GNU Emacs, but only under the conditions described in the
        !            15: ;; GNU Emacs General Public License.   A copy of this license is
        !            16: ;; supposed to have been given to you along with GNU Emacs so you
        !            17: ;; can know your rights and responsibilities.  It should be in a
        !            18: ;; file named COPYING.  Among other things, the copyright notice
        !            19: ;; and this notice must be preserved on all copies.
        !            20: 
        !            21: 
        !            22: ;; This function is called (by autoloading)
        !            23: ;; to handle any disabled command.
        !            24: ;; The command is found in this-command
        !            25: ;; and the keys are returned by (this-command-keys).
        !            26: 
        !            27: (defun disabled-command-hook (&rest ignore)
        !            28:   (let (char)
        !            29:     (save-window-excursion
        !            30:      (with-output-to-temp-buffer "*Help*"
        !            31:        (if (= (aref (this-command-keys) 0) ?\M-x)
        !            32:           (princ "You have invoked the disabled command ")
        !            33:         (princ "You have typed ")
        !            34:         (princ (key-description (this-command-keys)))
        !            35:         (princ ", invoking disabled command "))
        !            36:        (princ this-command)
        !            37:        (princ ":\n")
        !            38:        ;; Print any special message saying why the command is disabled.
        !            39:        (if (stringp (get this-command 'disabled))
        !            40:           (princ (get this-command 'disabled)))
        !            41:        (princ (or (condition-case ()
        !            42:                      (documentation this-command)
        !            43:                    (error nil))
        !            44:                  "<< not documented >>"))
        !            45:        ;; Keep only the first paragraph of the documentation.
        !            46:        (save-excursion
        !            47:         (set-buffer "*Help*")
        !            48:         (goto-char (point-min))
        !            49:         (if (search-forward "\n\n" nil t)
        !            50:             (delete-region (1- (point)) (point-max))
        !            51:           (goto-char (point-max))))
        !            52:        (princ "\n\n")
        !            53:        (princ "You can now type
        !            54: Space to try the command just this once,
        !            55:       but leave it disabled,
        !            56: Y to try it and enable it (no questions if you use it again),
        !            57: N to do nothing (command remains disabled)."))
        !            58:      (message "Type y, n or Space: ")
        !            59:      (let ((cursor-in-echo-area t))
        !            60:        (while (not (memq (setq char (downcase (read-char)))
        !            61:                         '(?  ?y ?n)))
        !            62:         (ding)
        !            63:         (message "Please type y, n or Space: "))))
        !            64:     (if (= char ?y)
        !            65:        (if (y-or-n-p "Enable command for future editing sessions also? ")
        !            66:            (enable-command this-command)
        !            67:          (put this-command 'disabled nil)))
        !            68:     (if (/= char ?n)
        !            69:        (call-interactively this-command))))
        !            70: 
        !            71: (defun enable-command (command)
        !            72:   "Allow COMMAND to be executed without special confirmation from now on.
        !            73: The user's .emacs file is altered so that this will apply
        !            74: to future sessions."
        !            75:   (interactive "CEnable command: ")
        !            76:   (put command 'disabled nil)
        !            77:   (save-excursion
        !            78:    (set-buffer (find-file-noselect (substitute-in-file-name "~/.emacs")))
        !            79:    (goto-char (point-min))
        !            80:    (if (search-forward (concat "(put '" (symbol-name command) " ") nil t)
        !            81:        (delete-region
        !            82:        (progn (beginning-of-line) (point))
        !            83:        (progn (forward-line 1) (point)))
        !            84:      ;; Must have been disabled by default.
        !            85:      (goto-char (point-max))
        !            86:      (insert "\n(put '" (symbol-name command) " 'disabled nil)\n"))
        !            87:    (setq foo (buffer-modified-p))
        !            88:    (save-buffer)))
        !            89: 
        !            90: (defun disable-command (command)
        !            91:   "Require special confirmation to execute COMMAND from now on.
        !            92: The user's .emacs file is altered so that this will apply
        !            93: to future sessions."
        !            94:   (interactive "CDisable command: ")
        !            95:   (put command 'disabled t)
        !            96:   (save-excursion
        !            97:    (set-buffer (find-file-noselect (substitute-in-file-name "~/.emacs")))
        !            98:    (goto-char (point-min))
        !            99:    (if (search-forward (concat "(put '" (symbol-name command) " ") nil t)
        !           100:        (delete-region
        !           101:        (progn (beginning-of-line) (point))
        !           102:        (progn (forward-line 1) (point))))
        !           103:    (goto-char (point-max))
        !           104:    (insert "(put '" (symbol-name command) " 'disabled t)\n")
        !           105:    (save-buffer)))
        !           106: 

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