1 ;;; zone.el --- idle display hacks
3 ;; Copyright (C) 2000-2011 Free Software Foundation, Inc.
5 ;; Author: Victor Zandy <zandy@cs.wisc.edu>
6 ;; Maintainer: Thien-Thi Nguyen <ttn@gnu.org>
8 ;; Created: June 6, 1998
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software: you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation, either version 3 of the License, or
15 ;; (at your option) any later version.
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
27 ;; Don't zone out in front of Emacs! Try M-x zone.
28 ;; If it eventually irritates you, try M-x zone-leave-me-alone.
30 ;; Bored by the zone pyrotechnics? Write your own! Add it to
31 ;; `zone-programs'. See `zone-call' for higher-ordered zoning.
33 ;; WARNING: Not appropriate for Emacs sessions over modems or
34 ;; computers as slow as mine.
36 ;; THANKS: Christopher Mayer, Scott Flinchbaugh,
37 ;; Rachel Kalmar, Max Froumentin, Juri Linkov,
38 ;; Luigi Panzeri, John Paul Wallington.
42 (defvar zone-timer nil
43 "The timer we use to decide when to zone out, or nil if none.")
45 (defvar zone-timeout nil
46 "*Seconds to timeout the zoning.
47 If nil, don't interrupt for about 1^26 seconds.")
49 ;; Vector of functions that zone out. `zone' will execute one of
50 ;; these functions, randomly chosen. The chosen function is invoked
51 ;; in the *zone* buffer, which contains the text of the selected
52 ;; window. If the function loops, it *must* periodically check and
53 ;; halt if `input-pending-p' is t (because quitting is disabled when
54 ;; Emacs idle timers are run).
55 (defvar zone-programs
[
57 zone-pgm-putz-with-case
62 zone-pgm-rotate-LR-lockstep
63 zone-pgm-rotate-RL-lockstep
64 zone-pgm-rotate-LR-variable
65 zone-pgm-rotate-RL-variable
67 zone-pgm-drip-fretfully
68 zone-pgm-five-oclock-swan-dive
69 zone-pgm-martini-swan-dive
71 zone-pgm-paragraph-spaz
73 zone-pgm-stress-destress
77 (defmacro zone-orig
(&rest body
)
78 `(with-current-buffer (get 'zone
'orig-buffer
)
81 (defmacro zone-hiding-modeline
(&rest body
)
82 ;; This formerly worked by temporarily altering face `mode-line',
83 ;; which did not even work right, it seems.
84 `(let (mode-line-format)
87 (defun zone-call (program &optional timeout
)
88 "Call PROGRAM in a zoned way.
89 If PROGRAM is a function, call it, interrupting after the amount
90 of time in seconds specified by optional arg TIMEOUT, or `zone-timeout'
92 PROGRAM can also be a list of elements, which are interpreted like so:
93 If the element is a function or a list of a function and a number,
94 apply `zone-call' recursively."
95 (cond ((functionp program
)
96 (with-timeout ((or timeout zone-timeout
(ash 1 26)))
99 (mapcar (lambda (elem)
100 (cond ((functionp elem
) (zone-call elem
))
102 (functionp (car elem
))
103 (numberp (cadr elem
)))
104 (apply 'zone-call elem
))
105 (t (error "bad `zone-call' elem: %S" elem
))))
110 "Zone out, completely."
112 (save-window-excursion
113 (let ((f (selected-frame))
114 (outbuf (get-buffer-create "*zone*"))
115 (text (buffer-substring (window-start) (window-end)))
116 (wp (1+ (- (window-point (selected-window))
118 (put 'zone
'orig-buffer
(current-buffer))
119 (put 'zone
'modeline-hidden-level
0)
120 (switch-to-buffer outbuf
)
121 (setq mode-name
"Zone")
123 (setq buffer-undo-list t
125 tab-width
(zone-orig tab-width
)
126 line-spacing
(zone-orig line-spacing
))
128 (untabify (point-min) (point-max))
129 (set-window-start (selected-window) (point-min))
130 (set-window-point (selected-window) wp
)
132 (let ((pgm (elt zone-programs
(random (length zone-programs
))))
133 (ct (and f
(frame-parameter f
'cursor-type
)))
134 (show-trailing-whitespace nil
)
135 (restore (list '(kill-buffer outbuf
))))
137 (modify-frame-parameters f
'((cursor-type .
(bar .
0))))
138 (setq restore
(cons '(modify-frame-parameters
139 f
(list (cons 'cursor-type ct
)))
141 ;; Make `restore' a self-disabling one-shot thunk.
142 (setq restore
`(lambda () ,@restore
(setq restore nil
)))
145 (message "Zoning... (%s)" pgm
)
147 ;; If some input is pending, zone says "sorry", which
148 ;; isn't nice; this might happen e.g. when they invoke the
149 ;; game by clicking the menu bar. So discard any pending
150 ;; input before zoning out.
151 (if (input-pending-p)
154 (message "Zoning...sorry"))
157 (while (not (input-pending-p))
158 (message "We were zoning when we wrote %s..." pgm
)
160 (message "...here's hoping we didn't hose your buffer!")
165 (message "Zoning...sorry")))
166 (when restore
(funcall restore
))))))
168 ;;;; Zone when idle, or not.
170 (defun zone-when-idle (secs)
171 "Zone out when Emacs has been idle for SECS seconds."
172 (interactive "nHow long before I start zoning (seconds): ")
173 (if (timerp zone-timer
)
174 (cancel-timer zone-timer
))
175 (setq zone-timer nil
)
177 (setq zone-timer
(run-with-idle-timer secs t
'zone
))))
179 (defun zone-leave-me-alone ()
180 "Don't zone out when Emacs is idle."
182 (if (timerp zone-timer
)
183 (cancel-timer zone-timer
))
184 (setq zone-timer nil
)
185 (message "I won't zone out any more"))
190 (defun zone-shift-up ()
192 (e (progn (forward-line 1) (point)))
193 (s (buffer-substring b e
)))
195 (goto-char (point-max))
198 (defun zone-shift-down ()
199 (goto-char (point-max))
201 (e (progn (forward-line -
1) (point)))
202 (s (buffer-substring b e
)))
204 (goto-char (point-min))
207 (defun zone-shift-left ()
208 (let ((inhibit-point-motion-hooks t
)
212 (setq s
(buffer-substring (point) (1+ (point))))
216 (ignore-errors (forward-char 1)))))
218 (defun zone-shift-right ()
219 (goto-char (point-max))
220 (let ((inhibit-point-motion-hooks t
)
224 (setq s
(buffer-substring (1- (point)) (point)))
230 (defun zone-pgm-jitter ()
237 (goto-char (point-min))
238 (while (not (input-pending-p))
239 (funcall (elt ops
(random (length ops
))))
240 (goto-char (point-min))
246 (defun zone-pgm-whack-chars ()
247 (let ((tbl (copy-sequence (get 'zone-pgm-whack-chars
'wc-tbl
))))
248 (while (not (input-pending-p))
251 (aset tbl i
(+ 48 (random (- 123 48))))
253 (translate-region (point-min) (point-max) tbl
)
256 (put 'zone-pgm-whack-chars
'wc-tbl
257 (let ((tbl (make-string 128 ?x
))
266 (defun zone-remove-text ()
271 (goto-char (point-min))
273 (if (looking-at "[^(){}\n\t ]")
274 (let ((n (random 5)))
284 (defun zone-pgm-dissolve ()
291 (defun zone-exploding-remove ()
295 (goto-char (point-min))
297 (if (looking-at "[^*\n\t ]")
298 (let ((n (random 5)))
307 (defun zone-pgm-explode ()
308 (zone-exploding-remove)
314 ;; Faster than `zone-pgm-putz-with-case', but not as good: all
315 ;; instances of the same letter have the same case, which produces a
316 ;; less interesting effect than you might imagine.
317 (defun zone-pgm-2nd-putz-with-case ()
318 (let ((tbl (make-string 128 ?x
))
323 (while (not (input-pending-p))
327 (if (zerop (random 5))
330 (setq i
(+ i
(1+ (random 5)))))
334 (if (zerop (random 5))
337 (setq i
(+ i
(1+ (random 5)))))
338 (translate-region (point-min) (point-max) tbl
)
341 (defun zone-pgm-putz-with-case ()
342 (goto-char (point-min))
343 (while (not (input-pending-p))
344 (let ((np (+ 2 (random 5)))
347 (funcall (if (zerop (random 2)) 'upcase-region
348 'downcase-region
) (1- np
) np
)
349 (setq np
(+ np
(1+ (random 5))))))
350 (goto-char (point-min))
356 (defun zone-line-specs ()
360 (goto-char (window-start))
361 (while (and ok
(< (point) (window-end)))
362 (when (looking-at "[\t ]*\\([^\n]+\\)")
363 (setq ret
(cons (cons (match-beginning 1) (match-end 1)) ret
)))
364 (setq ok
(zerop (forward-line 1)))))
367 (defun zone-pgm-rotate (&optional random-style
)
372 (let* ((beg (car ent
))
374 (amt (if random-style
375 (funcall random-style
)
377 (when (< (- end
(abs amt
)) beg
)
378 (setq amt
(random (- end beg
))))
382 (vector amt beg
(- end
(abs amt
)))
387 amt aamt cut paste txt i ent
)
388 (while (not (input-pending-p))
391 (setq ent
(aref specs i
))
392 (setq amt
(aref ent
0) aamt
(abs amt
))
395 (setq cut
2 paste
1))
396 (goto-char (aref ent cut
))
397 (setq aamt
(min aamt
(- (point-max) (point))))
398 (setq txt
(buffer-substring (point) (+ (point) aamt
)))
400 (goto-char (aref ent paste
))
405 (defun zone-pgm-rotate-LR-lockstep ()
406 (zone-pgm-rotate (lambda () 1)))
408 (defun zone-pgm-rotate-RL-lockstep ()
409 (zone-pgm-rotate (lambda () -
1)))
411 (defun zone-pgm-rotate-LR-variable ()
412 (zone-pgm-rotate (lambda () (1+ (random 3)))))
414 (defun zone-pgm-rotate-RL-variable ()
415 (zone-pgm-rotate (lambda () (1- (- (random 3))))))
420 (defsubst zone-cpos
(pos)
421 (buffer-substring pos
(1+ pos
)))
423 (defsubst zone-replace-char
(count del-count char-as-string new-value
)
424 (delete-char (or del-count
(- count
)))
425 (aset char-as-string
0 new-value
)
426 (dotimes (i count
) (insert char-as-string
)))
428 (defsubst zone-park
/sit-for
(pos seconds
)
431 (prog1 (sit-for seconds
)
434 (defun zone-fret (wbeg pos
)
435 (let* ((case-fold-search nil
)
436 (c-string (zone-cpos pos
))
437 (cw-ceil (ceiling (char-width (aref c-string
0))))
439 ((string-match "[a-z]" c-string
) (upcase c-string
))
440 ((string-match "[A-Z]" c-string
) (downcase c-string
))
441 (t (propertize " " 'display
`(space :width
,cw-ceil
)))))
446 (insert (if (= 0 (% i
2)) hmm c-string
))
447 (zone-park/sit-for wbeg
(setq wait
(* wait
0.8))))
448 (delete-char -
1) (insert c-string
)))
450 (defun zone-fill-out-screen (width height
)
451 (let ((start (window-start))
452 (line (make-string width
32))
453 (inhibit-point-motion-hooks t
))
455 ;; fill out rectangular ws block
456 (while (progn (end-of-line)
457 (let ((cc (current-column)))
459 (insert (substring line cc
))
460 (delete-char (- width cc
)))
461 (cond ((eobp) (insert "\n") nil
)
462 (t (forward-char 1) t
)))))
463 ;; pad ws past bottom of screen
464 (let ((nl (- height
(count-lines (point-min) (point)))))
466 (setq line
(concat line
"\n"))
473 (defun zone-fall-through-ws (c wbeg wend
)
474 (let* ((cw-ceil (ceiling (char-width (aref c
0))))
475 (spaces (make-string cw-ceil
32))
476 (col (current-column))
479 (while (when (save-excursion
480 (and (zerop (forward-line 1))
483 (= col
(current-column)))
484 (setq newpos
(point))
485 (string= spaces
(buffer-substring-no-properties
486 newpos
(+ newpos cw-ceil
)))
487 (setq newpos
(+ newpos
(1- cw-ceil
)))))
492 (when (< (point) wend
)
493 (delete-char cw-ceil
)
496 (zone-park/sit-for wbeg
(setq wait
(* wait
0.8))))))
499 (defun zone-pgm-drip (&optional fret-p pancake-p
)
500 (let* ((ww (1- (window-width)))
506 (zone-fill-out-screen ww wh
)
507 (setq wbeg
(window-start)
510 (while (not (input-pending-p))
511 (setq mc
0 wend
(window-end))
512 ;; select non-ws character, but don't miss too much
513 (goto-char (+ wbeg
(random (- wend wbeg
))))
514 (while (looking-at "[ \n\f]")
515 (if (= total
(setq mc
(1+ mc
)))
517 (goto-char (+ wbeg
(random (- wend wbeg
))))))
518 ;; character animation sequence
520 (when fret-p
(zone-fret wbeg p
))
522 (setq c
(zone-cpos p
)
523 fall-p
(zone-fall-through-ws c wbeg wend
)))
524 ;; assuming current-column has not changed...
527 (< (count-lines (point-min) (point))
529 (let ((cw (ceiling (char-width (aref c
0)))))
530 (zone-replace-char cw
1 c ?
@) (zone-park/sit-for wbeg
0.137)
531 (zone-replace-char cw nil c ?
*) (zone-park/sit-for wbeg
0.137)
532 (zone-replace-char cw nil c ?_
)))))))
534 (defun zone-pgm-drip-fretfully ()
537 (defun zone-pgm-five-oclock-swan-dive ()
538 (zone-pgm-drip nil t
))
540 (defun zone-pgm-martini-swan-dive ()
543 (defun zone-pgm-rat-race ()
544 (while (not (input-pending-p))
545 (zone-call '((zone-pgm-rotate 10)
546 (zone-pgm-drip-fretfully 15)
549 (goto-char (point-min))
550 (while (re-search-forward " +$" nil t
)
551 (delete-region (match-beginning 0) (match-end 0))))
555 ;;;; paragraph spazzing (for textish modes)
557 (defun zone-pgm-paragraph-spaz ()
558 (if (memq (zone-orig major-mode
)
559 ;; there should be a better way to distinguish textish modes
560 '(text-mode texinfo-mode fundamental-mode
))
561 (let ((fill-column fill-column
)
564 (max-fc (1- (frame-width))))
567 (setq fill-column
(+ fill-column
(- (random 5) 2)))
568 (when (< fill-column fc-min
)
569 (setq fc-min fill-column
))
570 (when (> fill-column max-fc
)
571 (setq fill-column max-fc
))
572 (when (> fill-column fc-max
)
573 (setq fc-max fill-column
))))
574 (message "Zoning... (zone-pgm-rotate)")
578 ;;;; stressing and destressing
580 (defun zone-pgm-stress ()
581 (goto-char (point-min))
584 (while (and ok
(< (point) (point-max)))
586 (setq ok
(zerop (forward-line 1))
587 lines
(cons (buffer-substring p
(point)) lines
))))
589 (zone-hiding-modeline
590 (let ((msg "Zoning... (zone-pgm-stress)"))
591 (while (not (string= msg
""))
592 (message (setq msg
(substring msg
1)))
594 (while (not (input-pending-p))
595 (when (< 50 (random 100))
596 (goto-char (point-max))
598 (let ((kill-whole-line t
))
600 (goto-char (point-min))
601 (insert (nth (random (length lines
)) lines
)))
602 (message (concat (make-string (random (- (frame-width) 5)) ?
) "grrr"))
605 (defun zone-pgm-stress-destress ()
606 (zone-call 'zone-pgm-stress
25)
607 (zone-hiding-modeline
611 (insert-buffer-substring "*Messages*")
613 (goto-char (point-max))
616 (delete-region (point-min) (window-start))
617 (message "hey why stress out anyway?")
618 (zone-call '((zone-pgm-rotate 30)
619 (zone-pgm-whack-chars 10)
623 ;;;; the lyfe so short the craft so long to lerne --chaucer
625 (defvar zone-pgm-random-life-wait nil
626 "*Seconds to wait between successive `life' generations.
627 If nil, `zone-pgm-random-life' chooses a value from 0-3 (inclusive).")
629 (defun zone-pgm-random-life ()
631 (zone-fill-out-screen (1- (window-width)) (1- (window-height)))
632 (let ((top (progn (goto-char (window-start)) (forward-line 7) (point)))
633 (bot (progn (goto-char (window-end)) (forward-line -
7) (point)))
634 (rtc (- (frame-width) 11))
636 (max (1- (window-end)))
638 (delete-region max
(point-max))
639 (while (and (progn (goto-char min
) (sit-for 0.05))
640 (progn (goto-char (+ min
(random max
)))
641 (or (progn (skip-chars-forward " @\n" max
)
642 (not (= max
(point))))
643 (unless (or (= 0 (skip-chars-backward " @\n" min
))
647 (unless (or (eolp) (eobp))
648 (setq s
(zone-cpos (point))
652 1 s
(cond ((or (> top
(point))
654 (or (> 11 (setq col
(current-column)))
657 ((and (<= ?a c
) (>= ?z c
)) (+ c
(- ?A ?a
)))
658 ((and (<= ?A c
) (>= ?Z c
)) ?
*)
663 (while (< top
(point))
666 (setq col
(cons (buffer-substring (point) c
) col
))
667 ; (let ((inhibit-point-motion-hooks t))
670 (let ((life-patterns (vector
671 (if (and col
(search-forward "@" max t
))
672 (cons (make-string (length (car col
)) 32) col
)
673 (list (mapconcat 'identity
674 (make-list (/ (- rtc
11) 15)
676 (make-string 10 32)))))))
677 (life (or zone-pgm-random-life-wait
(random 4)))
686 ;;; zone.el ends here