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;;; rot13.el --- display a buffer in rot13.
;; Copyright (C) 1988 Free Software Foundation, Inc.
;; Author: Howard Gayle:
;; Maintainer: FSF
;; 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 2, 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.
;; Commentary:
;; Written by Howard Gayle. See case-table.el for details.
;; This hack is mainly to show off the char table stuff.
;;; Code:
(defvar rot13-display-table
(let ((table (make-display-table))
(i 0))
(while (< i 26)
(aset table (+ i ?a) (make-rope (+ (% (+ i 13) 26) ?a)))
(aset table (+ i ?A) (make-rope (+ (% (+ i 13) 26) ?A)))
(setq i (1+ i)))
table)
"Char table for rot 13 display.")
(defun rot13-other-window ()
"Display current buffer in rot 13 in another window."
(interactive)
(let ((w (display-buffer (current-buffer) t)))
(set-window-display-table w rot13-display-table)))
(provide 'rot13)
;;; rot13.el ends here
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