--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/games/dissociate.el	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,102 @@
+;;; dissociate.el --- scramble text amusingly for Emacs.
+
+;; Copyright (C) 1985 Free Software Foundation, Inc.
+
+;; Maintainer: FSF
+;; Keywords: games
+
+;; This file is part of XEmacs.
+
+;; XEmacs 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.
+
+;; XEmacs 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 XEmacs; see the file COPYING.  If not, write to the Free
+;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Synched up with: FSF 19.28.
+
+;;; Commentary:
+
+;; The single entry point, `dissociated-press', applies a travesty
+;; generator to the current buffer.  The results can be quite amusing.
+
+;;; Code:
+
+;;;###autoload
+(defun dissociated-press (&optional arg)
+  "Dissociate the text of the current buffer.
+Output goes in buffer named *Dissociation*,
+which is redisplayed each time text is added to it.
+Every so often the user must say whether to continue.
+If ARG is positive, require ARG chars of continuity.
+If ARG is negative, require -ARG words of continuity.
+Default is 2."
+  (interactive "P")
+  (setq arg (if arg (prefix-numeric-value arg) 2))
+  (let* ((inbuf (current-buffer))
+	 (outbuf (get-buffer-create "*Dissociation*"))
+	 (move-function (if (> arg 0) 'forward-char 'forward-word))
+	 (move-amount (if (> arg 0) arg (- arg)))
+	 (search-function (if (> arg 0) 'search-forward 'word-search-forward))
+	 (last-query-point 0))
+    (if (= (point-max) (point-min))
+	(error "The buffer contains no text to start from"))
+    (switch-to-buffer outbuf)
+    (erase-buffer)
+    (while
+      (save-excursion
+	(goto-char last-query-point)
+	(vertical-motion (- (window-height) 4))
+	(or (= (point) (point-max))
+	    (and (progn (goto-char (point-max))
+			(y-or-n-p "Continue dissociation? "))
+		 (progn
+		   (message "")
+		   (recenter 1)
+		   (setq last-query-point (point-max))
+		   t))))
+      (let (start end)
+	(save-excursion
+	 (set-buffer inbuf)
+	 (setq start (point))
+	 (if (eq move-function 'forward-char)
+	     (progn
+	       (setq end (+ start (+ move-amount (random 16))))
+	       (if (> end (point-max))
+		   (setq end (+ 1 move-amount (random 16))))
+	       (goto-char end))
+	   (funcall move-function
+		    (+ move-amount (random 16))))
+	 (setq end (point)))
+	(let ((opoint (point)))
+	  (insert-buffer-substring inbuf start end)
+	  (save-excursion
+	   (goto-char opoint)
+	   (end-of-line)
+	   (and (> (current-column) fill-column)
+		(do-auto-fill)))))
+      (save-excursion
+       (set-buffer inbuf)
+       (if (eobp)
+	   (goto-char (point-min))
+	 (let ((overlap
+		(buffer-substring (prog1 (point)
+					 (funcall move-function
+						  (- move-amount)))
+				  (point))))
+	   (goto-char (1+ (random (1- (point-max)))))
+	   (or (funcall search-function overlap nil t)
+	       (let ((opoint (point)))
+		 (goto-char 1)
+		 (funcall search-function overlap opoint t))))))
+      (sit-for 0))))
+
+;;; dissociate.el ends here