1 files changed, 87 insertions, 0 deletions
diff --git a/lisp/dissociate.el b/lisp/dissociate.el
new file mode 100644
index 00000000000..6b5c373160b
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+++ b/lisp/dissociate.el
@@ -0,0 +1,87 @@
+;; Scramble text amusingly for Emacs.
+;; Copyright (C) 1985 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.
+
+
+(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))
+    (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 (logand 15 (random)))))
+	       (if (> end (point-max))
+		   (setq end (+ 1 move-amount (logand 15 (random)))))
+	       (goto-char end))
+	   (funcall move-function
+		    (+ move-amount (logand 15 (random)))))
+	 (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))))
+	   (let (ranval)
+	     (while (< (setq ranval (random)) 0))
+	     (goto-char (1+ (% ranval (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))))