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100 lines
3.2 KiB
EmacsLisp
100 lines
3.2 KiB
EmacsLisp
;;; dissociate.el --- scramble text amusingly for Emacs -*- lexical-binding:t -*-
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;; Copyright (C) 1985, 2001-2024 Free Software Foundation, Inc.
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;; Maintainer: emacs-devel@gnu.org
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;; Keywords: games
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; The single entry point, `dissociated-press', applies a travesty
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;; generator to the current buffer. The results can be quite amusing.
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;;; Code:
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;;;###autoload
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(defun dissociated-press (&optional arg)
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"Dissociate the text of the current buffer.
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Output goes in buffer named *Dissociation*,
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which is redisplayed each time text is added to it.
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Every so often the user must say whether to continue.
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If ARG is positive, require ARG chars of continuity.
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If ARG is negative, require -ARG words of continuity.
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Default is 2."
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(interactive "P")
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(setq arg (if arg (prefix-numeric-value arg) 2))
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(let* ((inbuf (current-buffer))
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(outbuf (get-buffer-create "*Dissociation*"))
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(move-function (if (> arg 0) 'forward-char 'forward-word))
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(move-amount (if (> arg 0) arg (- arg)))
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(search-function (if (> arg 0) 'search-forward 'word-search-forward))
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(last-query-point 0))
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(if (= (point-max) (point-min))
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(error "The buffer contains no text to start from"))
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(switch-to-buffer outbuf)
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(erase-buffer)
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(while
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(save-excursion
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(goto-char last-query-point)
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(vertical-motion (- (window-height) 4))
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(or (= (point) (point-max))
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(and (progn (goto-char (point-max))
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(y-or-n-p "Continue dissociation? "))
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(progn
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(message "")
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(recenter 1)
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(setq last-query-point (point-max))
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t))))
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(let (start end)
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(with-current-buffer inbuf
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(setq start (point))
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(if (eq move-function 'forward-char)
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(progn
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(setq end (+ start (+ move-amount (random 16))))
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(if (> end (point-max))
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(setq end (+ 1 move-amount (random 16))))
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(goto-char end))
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(funcall move-function
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(+ move-amount (random 16))))
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(setq end (point)))
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(let ((opoint (point)))
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(insert-buffer-substring inbuf start end)
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(save-excursion
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(goto-char opoint)
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(end-of-line)
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(and (> (current-column) fill-column)
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(do-auto-fill)))))
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(with-current-buffer inbuf
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(if (eobp)
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(goto-char (point-min))
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(let ((overlap
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(buffer-substring (prog1 (point)
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(funcall move-function
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(- move-amount)))
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(point))))
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(goto-char (1+ (random (1- (point-max)))))
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(or (funcall search-function overlap nil t)
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(let ((opoint (point)))
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(goto-char 1)
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(funcall search-function overlap opoint t))))))
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(sit-for 0))))
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(provide 'dissociate)
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;;; dissociate.el ends here
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