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emacs/lisp/play/studly.el
Stefan Kangas 4c549ab5d0 Use lexical-binding in morse.el and studly.el and add tests
* lisp/play/morse.el: Use lexical-binding.
* lisp/play/studly.el: Use lexical-binding.
* test/lisp/play/morse-tests.el: New file.
* test/lisp/play/studly-tests.el: New file.
2019-06-01 18:52:22 -07:00

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1.9 KiB
EmacsLisp

;;; studly.el --- StudlyCaps (tm)(r)(c)(xxx) -*- lexical-binding: t -*-
;;; This is in the public domain, since it was distributed
;;; by its author in 1986 without a copyright notice.
;; This file is part of GNU Emacs.
;; Maintainer: emacs-devel@gnu.org
;; Keywords: games
;;; Commentary:
;; Functions to studlycapsify a region, word, or buffer. Possibly the
;; esoteric significance of studlycapsification escapes you; that is,
;; you suffer from autostudlycapsifibogotification. Too bad.
;;; Code:
;;;###autoload
(defun studlify-region (begin end)
"Studlify-case the region."
(interactive "*r")
(save-excursion
(goto-char begin)
(setq begin (point))
(while (and (<= (point) end)
(not (looking-at "\\W*\\'")))
(forward-word-strictly 1)
(backward-word-strictly 1)
(setq begin (max (point) begin))
(forward-word-strictly 1)
(let ((offset 0)
(word-end (min (point) end))
c)
(goto-char begin)
(while (< (point) word-end)
(setq offset (+ offset (following-char)))
(forward-char 1))
(setq offset (+ offset (following-char)))
(goto-char begin)
(while (< (point) word-end)
(setq c (following-char))
(if (and (= (% (+ c offset) 4) 2)
(let ((ch (following-char)))
(or (and (>= ch ?a) (<= ch ?z))
(and (>= ch ?A) (<= ch ?Z)))))
(progn
(delete-char 1)
(insert (logxor c ? ))))
(forward-char 1))
(setq begin (point))))))
;;;###autoload
(defun studlify-word (count)
"Studlify-case the current word, or COUNT words if given an argument."
(interactive "*p")
(let ((begin (point)) end rb re)
(forward-word-strictly count)
(setq end (point))
(setq rb (min begin end) re (max begin end))
(studlify-region rb re)))
;;;###autoload
(defun studlify-buffer ()
"Studlify-case the current buffer."
(interactive "*")
(studlify-region (point-min) (point-max)))
(provide 'studly)
;;; studly.el ends here