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;;; zone.el --- idle display hacks
;; Copyright (C) 2000-2018 Free Software Foundation, Inc.
;; Author: Victor Zandy <zandy@cs.wisc.edu>
;; Maintainer: Thien-Thi Nguyen <ttn@gnu.org>
;; Keywords: games
;; Created: June 6, 1998
;; 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 3 of the License, 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. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Don't zone out in front of Emacs! Try M-x zone.
;; If it eventually irritates you, try M-x zone-leave-me-alone.
;; Bored by the zone pyrotechnics? Write your own! Add it to
;; `zone-programs'. See `zone-call' for higher-ordered zoning.
;; THANKS: Christopher Mayer, Scott Flinchbaugh,
;; Rachel Kalmar, Max Froumentin, Juri Linkov,
;; Luigi Panzeri, John Paul Wallington.
;;; Code:
(defvar zone-timer nil
"The timer we use to decide when to zone out, or nil if none.")
(defvar zone-timeout nil
"Seconds to timeout the zoning.
If nil, don't interrupt for about 1^26 seconds.")
;; Vector of functions that zone out. `zone' will execute one of
;; these functions, randomly chosen. The chosen function is invoked
;; in the *zone* buffer, which contains the text of the selected
;; window. If the function loops, it *must* periodically check and
;; halt if `input-pending-p' is t (because quitting is disabled when
;; Emacs idle timers are run).
(defvar zone-programs [
zone-pgm-jitter
zone-pgm-putz-with-case
zone-pgm-dissolve
;; zone-pgm-explode
zone-pgm-whack-chars
zone-pgm-rotate
zone-pgm-rotate-LR-lockstep
zone-pgm-rotate-RL-lockstep
zone-pgm-rotate-LR-variable
zone-pgm-rotate-RL-variable
zone-pgm-drip
zone-pgm-drip-fretfully
zone-pgm-five-oclock-swan-dive
zone-pgm-martini-swan-dive
zone-pgm-rat-race
zone-pgm-paragraph-spaz
zone-pgm-stress
zone-pgm-stress-destress
zone-pgm-random-life
])
(defmacro zone-orig (&rest body)
`(with-current-buffer (get 'zone 'orig-buffer)
,@body))
(defmacro zone-hiding-mode-line (&rest body)
;; This formerly worked by temporarily altering face `mode-line',
;; which did not even work right, it seems.
`(let (mode-line-format)
,@body))
(defun zone-call (program &optional timeout)
"Call PROGRAM in a zoned way.
If PROGRAM is a function, call it, interrupting after the amount
of time in seconds specified by optional arg TIMEOUT, or `zone-timeout'
if unspecified, q.v.
PROGRAM can also be a list of elements, which are interpreted like so:
If the element is a function or a list of a function and a number,
apply `zone-call' recursively."
(cond ((functionp program)
(with-timeout ((or timeout zone-timeout (ash 1 26)))
(funcall program)))
((listp program)
(mapcar (lambda (elem)
(cond ((functionp elem) (zone-call elem))
((and (listp elem)
(functionp (car elem))
(numberp (cadr elem)))
(apply 'zone-call elem))
(t (error "bad `zone-call' elem: %S" elem))))
program))))
;;;###autoload
(defun zone ()
"Zone out, completely."
(interactive)
(save-window-excursion
(let ((f (selected-frame))
(outbuf (get-buffer-create "*zone*"))
(text (buffer-substring (window-start) (window-end)))
(wp (1+ (- (window-point)
(window-start)))))
(put 'zone 'orig-buffer (current-buffer))
(switch-to-buffer outbuf)
(setq mode-name "Zone")
(erase-buffer)
(setq buffer-undo-list t
truncate-lines t
tab-width (zone-orig tab-width)
line-spacing (zone-orig line-spacing))
(insert text)
(untabify (point-min) (point-max))
(set-window-start (selected-window) (point-min))
(set-window-point (selected-window) wp)
(sit-for 0 500)
(let ((pgm (elt zone-programs (random (length zone-programs))))
(ct (and f (frame-parameter f 'cursor-type)))
(show-trailing-whitespace nil)
(restore (list '(kill-buffer outbuf))))
(when ct
(modify-frame-parameters f '((cursor-type . (bar . 0))))
(setq restore (cons '(modify-frame-parameters
f (list (cons 'cursor-type ct)))
restore)))
;; Make `restore' a self-disabling one-shot thunk.
(setq restore `(lambda () ,@restore (setq restore nil)))
(condition-case nil
(progn
(message "Zoning... (%s)" pgm)
(garbage-collect)
;; If some input is pending, zone says "sorry", which
;; isn't nice; this might happen e.g. when they invoke the
;; game by clicking the menu bar. So discard any pending
;; input before zoning out.
(if (input-pending-p)
(discard-input))
(zone-call pgm)
(message "Zoning...sorry"))
(error
(funcall restore)
(while (not (input-pending-p))
(message "We were zoning when we wrote %s..." pgm)
(sit-for 3)
(message "...here's hoping we didn't hose your buffer!")
(sit-for 3)))
(quit
(funcall restore)
(ding)
(message "Zoning...sorry")))
(when restore (funcall restore))))))
;;;; Zone when idle, or not.
(defun zone-when-idle (secs)
"Zone out when Emacs has been idle for SECS seconds."
(interactive "nHow long before I start zoning (seconds): ")
(if (timerp zone-timer)
(cancel-timer zone-timer))
(setq zone-timer nil)
(or (<= secs 0)
(setq zone-timer (run-with-idle-timer secs t 'zone))))
(defun zone-leave-me-alone ()
"Don't zone out when Emacs is idle."
(interactive)
(if (timerp zone-timer)
(cancel-timer zone-timer))
(setq zone-timer nil)
(message "I won't zone out any more"))
;;;; jittering
(defun zone-shift-up ()
(let* ((b (point))
(e (progn (forward-line 1) (point)))
(s (buffer-substring b e)))
(delete-region b e)
(goto-char (point-max))
(insert s)))
(defun zone-shift-down ()
(goto-char (point-max))
(let* ((b (point))
(e (progn (forward-line -1) (point)))
(s (buffer-substring b e)))
(delete-region b e)
(goto-char (point-min))
(insert s)))
(defun zone-shift-left ()
(let ((inhibit-point-motion-hooks t)
s)
(while (not (eobp))
(unless (eolp)
(setq s (buffer-substring (point) (1+ (point))))
(delete-char 1)
(end-of-line)
(insert s))
(ignore-errors (forward-char 1)))))
(defun zone-shift-right ()
(goto-char (point-max))
(let ((inhibit-point-motion-hooks t)
s)
(while (not (bobp))
(unless (bolp)
(setq s (buffer-substring (1- (point)) (point)))
(delete-char -1)
(beginning-of-line)
(insert s))
(end-of-line 0))))
(defun zone-pgm-jitter ()
(let ((ops [
zone-shift-left
zone-shift-right
zone-shift-down
zone-shift-up
]))
(goto-char (point-min))
(while (not (input-pending-p))
(funcall (elt ops (random (length ops))))
(goto-char (point-min))
(sit-for 0 10))))
;;;; whacking chars
(defun zone-pgm-whack-chars ()
(let ((tbl (copy-sequence (get 'zone-pgm-whack-chars 'wc-tbl))))
(while (not (input-pending-p))
(let ((i 48))
(while (< i 122)
(aset tbl i (+ 48 (random (- 123 48))))
(setq i (1+ i)))
(translate-region (point-min) (point-max) tbl)
(sit-for 0 2)))))
(put 'zone-pgm-whack-chars 'wc-tbl
(let ((tbl (make-string 128 ?x))
(i 0))
(while (< i 128)
(aset tbl i i)
(setq i (1+ i)))
tbl))
;;;; dissolving
(defun zone-remove-text ()
(let ((working t))
(while working
(setq working nil)
(save-excursion
(goto-char (point-min))
(while (not (eobp))
(if (looking-at "[^(){}\n\t ]")
(let ((n (random 5)))
(if (not (= n 0))
(progn
(setq working t)
(forward-char 1))
(delete-char 1)
(insert " ")))
(forward-char 1))))
(sit-for 0 2))))
(defun zone-pgm-dissolve ()
(zone-remove-text)
(zone-pgm-jitter))
;;;; exploding
(defun zone-exploding-remove ()
(let ((i 0))
(while (< i 5)
(save-excursion
(goto-char (point-min))
(while (not (eobp))
(if (looking-at "[^*\n\t ]")
(let ((n (random 5)))
(if (not (= n 0))
(forward-char 1))
(insert " ")))
(forward-char 1)))
(setq i (1+ i))
(sit-for 0 2)))
(zone-pgm-jitter))
(defun zone-pgm-explode ()
(zone-exploding-remove)
(zone-pgm-jitter))
;;;; putzing w/ case
;; Faster than `zone-pgm-putz-with-case', but not as good: all
;; instances of the same letter have the same case, which produces a
;; less interesting effect than you might imagine.
(defun zone-pgm-2nd-putz-with-case ()
(let ((tbl (make-string 128 ?x))
(i 0))
(while (< i 128)
(aset tbl i i)
(setq i (1+ i)))
(while (not (input-pending-p))
(setq i ?a)
(while (<= i ?z)
(aset tbl i
(if (zerop (random 5))
(upcase i)
(downcase i)))
(setq i (+ i (1+ (random 5)))))
(setq i ?A)
(while (<= i ?z)
(aset tbl i
(if (zerop (random 5))
(downcase i)
(upcase i)))
(setq i (+ i (1+ (random 5)))))
(translate-region (point-min) (point-max) tbl)
(sit-for 0 2))))
(defun zone-pgm-putz-with-case ()
(goto-char (point-min))
(while (not (input-pending-p))
(let ((np (+ 2 (random 5)))
(pm (point-max)))
(while (< np pm)
(funcall (if (zerop (random 2)) 'upcase-region
'downcase-region) (1- np) np)
(setq np (+ np (1+ (random 5))))))
(goto-char (point-min))
(sit-for 0 2)))
;;;; rotating
(defun zone-line-specs ()
(let ((ok t)
ret)
(save-excursion
(goto-char (window-start))
(while (and ok (< (point) (window-end)))
(when (looking-at "[\t ]*\\([^\n]+\\)")
(setq ret (cons (cons (match-beginning 1) (match-end 1)) ret)))
(setq ok (zerop (forward-line 1)))))
ret))
(defun zone-pgm-rotate (&optional random-style)
(let* ((specs (apply
'vector
(let (res)
(mapc (lambda (ent)
(let* ((beg (car ent))
(end (cdr ent))
(amt (if random-style
(funcall random-style)
(- (random 7) 3))))
(when (< (- end (abs amt)) beg)
(setq amt (random (- end beg))))
(unless (= 0 amt)
(setq res
(cons
(vector amt beg (- end (abs amt)))
res)))))
(zone-line-specs))
res)))
(n (length specs))
amt aamt cut paste txt i ent)
(while (not (input-pending-p))
(setq i 0)
(while (< i n)
(setq ent (aref specs i))
(setq amt (aref ent 0) aamt (abs amt))
(if (> 0 amt)
(setq cut 1 paste 2)
(setq cut 2 paste 1))
(goto-char (aref ent cut))
(setq aamt (min aamt (- (point-max) (point))))
(setq txt (buffer-substring (point) (+ (point) aamt)))
(delete-char aamt)
(goto-char (aref ent paste))
(insert txt)
(setq i (1+ i)))
(sit-for 0.04))))
(defun zone-pgm-rotate-LR-lockstep ()
(zone-pgm-rotate (lambda () 1)))
(defun zone-pgm-rotate-RL-lockstep ()
(zone-pgm-rotate (lambda () -1)))
(defun zone-pgm-rotate-LR-variable ()
(zone-pgm-rotate (lambda () (1+ (random 3)))))
(defun zone-pgm-rotate-RL-variable ()
(zone-pgm-rotate (lambda () (1- (- (random 3))))))
;;;; dripping
(defsubst zone-cpos (pos)
(buffer-substring pos (1+ pos)))
(defsubst zone-replace-char (count del-count char-as-string new-value)
(delete-char (or del-count (- count)))
(aset char-as-string 0 new-value)
(dotimes (i count) (insert char-as-string)))
(defsubst zone-park/sit-for (pos seconds)
(let ((p (point)))
(goto-char pos)
(prog1 (sit-for seconds)
(goto-char p))))
(defun zone-fret (wbeg pos)
(let* ((case-fold-search nil)
(c-string (zone-cpos pos))
(cw-ceil (ceiling (char-width (aref c-string 0))))
(hmm (cond
((string-match "[a-z]" c-string) (upcase c-string))
((string-match "[A-Z]" c-string) (downcase c-string))
(t (propertize " " 'display `(space :width ,cw-ceil)))))
(wait 0.5))
(dotimes (i 20)
(goto-char pos)
(delete-char 1)
(insert (if (= 0 (% i 2)) hmm c-string))
(zone-park/sit-for wbeg (setq wait (* wait 0.8))))
(delete-char -1) (insert c-string)))
(defun zone-fill-out-screen (width height)
(let ((start (window-start))
(line (make-string width 32))
(inhibit-point-motion-hooks t))
(goto-char start)
;; fill out rectangular ws block
(while (progn (end-of-line)
(let ((cc (current-column)))
(if (< cc width)
(insert (substring line cc))
(delete-char (- width cc)))
(cond ((eobp) (insert "\n") nil)
(t (forward-char 1) t)))))
;; pad ws past bottom of screen
(let ((nl (- height (count-lines (point-min) (point)))))
(when (> nl 0)
(setq line (concat line "\n"))
(dotimes (i nl)
(insert line))))
(goto-char start)
(recenter 0)
(sit-for 0)))
(defun zone-fall-through-ws (c wbeg wend)
(let* ((cw-ceil (ceiling (char-width (aref c 0))))
(spaces (make-string cw-ceil 32))
(col (current-column))
(wait 0.15)
newpos fall-p)
(while (when (save-excursion
(and (zerop (forward-line 1))
(progn
(forward-char col)
(= col (current-column)))
(setq newpos (point))
(string= spaces (buffer-substring-no-properties
newpos (+ newpos cw-ceil)))
(setq newpos (+ newpos (1- cw-ceil)))))
(setq fall-p t)
(delete-char 1)
(insert spaces)
(goto-char newpos)
(when (< (point) wend)
(delete-char cw-ceil)
(insert c)
(forward-char -1)
(zone-park/sit-for wbeg (setq wait (* wait 0.8))))))
fall-p))
(defun zone-pgm-drip (&optional fret-p pancake-p)
(let* ((ww (1- (window-width)))
(wh (window-height))
(mc 0) ; miss count
(total (* ww wh))
(fall-p nil)
wbeg wend c)
(zone-fill-out-screen ww wh)
(setq wbeg (window-start)
wend (window-end))
(catch 'done
(while (not (input-pending-p))
(setq mc 0 wend (window-end))
;; select non-ws character, but don't miss too much
(goto-char (+ wbeg (random (- wend wbeg))))
(while (looking-at "[ \n\f]")
(if (= total (setq mc (1+ mc)))
(throw 'done 'sel)
(goto-char (+ wbeg (random (- wend wbeg))))))
;; character animation sequence
(let ((p (point)))
(when fret-p (zone-fret wbeg p))
(goto-char p)
(setq c (zone-cpos p)
fall-p (zone-fall-through-ws c wbeg wend)))
;; assuming current-column has not changed...
(when (and pancake-p
fall-p
(< (count-lines (point-min) (point))
wh))
(let ((cw (ceiling (char-width (aref c 0)))))
(zone-replace-char cw 1 c ?@) (zone-park/sit-for wbeg 0.137)
(zone-replace-char cw nil c ?*) (zone-park/sit-for wbeg 0.137)
(zone-replace-char cw nil c ?_)))))))
(defun zone-pgm-drip-fretfully ()
(zone-pgm-drip t))
(defun zone-pgm-five-oclock-swan-dive ()
(zone-pgm-drip nil t))
(defun zone-pgm-martini-swan-dive ()
(zone-pgm-drip t t))
(defun zone-pgm-rat-race ()
(while (not (input-pending-p))
(zone-call '((zone-pgm-rotate 10)
(zone-pgm-drip-fretfully 15)
(zone-pgm-drip 10)
((lambda ()
(goto-char (point-min))
(while (re-search-forward " +$" nil t)
(delete-region (match-beginning 0) (match-end 0))))
5)))))
;;;; paragraph spazzing (for textish modes)
(defun zone-pgm-paragraph-spaz ()
(if (memq (zone-orig major-mode)
;; there should be a better way to distinguish textish modes
'(text-mode texinfo-mode fundamental-mode))
(let ((fill-column fill-column)
(fc-min fill-column)
(fc-max fill-column)
(max-fc (1- (frame-width))))
(while (sit-for 0.1)
(fill-paragraph 1)
(setq fill-column (+ fill-column (- (random 5) 2)))
(when (< fill-column fc-min)
(setq fc-min fill-column))
(when (> fill-column max-fc)
(setq fill-column max-fc))
(when (> fill-column fc-max)
(setq fc-max fill-column))))
(message "Zoning... (zone-pgm-rotate)")
(zone-pgm-rotate)))
;;;; stressing and destressing
(defun zone-pgm-stress ()
(goto-char (point-min))
(let ((ok t)
lines)
(while (and ok (< (point) (point-max)))
(let ((p (point)))
(setq ok (zerop (forward-line 1))
lines (cons (buffer-substring p (point)) lines))))
(sit-for 5)
(zone-hiding-mode-line
(let ((msg "Zoning... (zone-pgm-stress)"))
(while (not (string= msg ""))
(message (setq msg (substring msg 1)))
(sit-for 0.05)))
(while (not (input-pending-p))
(when (< 50 (random 100))
(goto-char (point-max))
(forward-line -1)
(delete-region (point) (line-beginning-position 2))
(goto-char (point-min))
(insert (nth (random (length lines)) lines)))
(message (concat (make-string (random (- (frame-width) 5)) ? ) "grrr"))
(sit-for 0.1)))))
(defun zone-pgm-stress-destress ()
(zone-call 'zone-pgm-stress 25)
(zone-hiding-mode-line
(sit-for 3)
(erase-buffer)
(sit-for 3)
(insert-buffer-substring "*Messages*")
(message "")
(goto-char (point-max))
(recenter -1)
(sit-for 3)
(delete-region (point-min) (window-start))
(message "hey why stress out anyway?")
(zone-call '((zone-pgm-rotate 30)
(zone-pgm-whack-chars 10)
zone-pgm-drip))))
;;;; the lyfe so short the craft so long to lerne --chaucer
(defvar zone-pgm-random-life-wait nil
"Seconds to wait between successive `life' generations.
If nil, `zone-pgm-random-life' chooses a value from 0-3 (inclusive).")
(defvar life-patterns) ; from life.el
(defun zone-pgm-random-life ()
(require 'life)
(zone-fill-out-screen (1- (window-width)) (1- (window-height)))
(let ((top (progn (goto-char (window-start)) (forward-line 7) (point)))
(bot (progn (goto-char (window-end)) (forward-line -7) (point)))
(rtc (- (frame-width) 11))
(min (window-start))
(max (1- (window-end)))
s c col)
(delete-region max (point-max))
(while (and (progn (goto-char min) (sit-for 0.05))
(progn (goto-char (+ min (random max)))
(or (progn (skip-chars-forward " @\n" max)
(not (= max (point))))
(unless (or (= 0 (skip-chars-backward " @\n" min))
(= min (point)))
(forward-char -1)
t))))
(unless (or (eolp) (eobp))
(setq s (zone-cpos (point))
c (aref s 0))
(zone-replace-char
(char-width c)
1 s (cond ((or (> top (point))
(< bot (point))
(or (> 11 (setq col (current-column)))
(< rtc col)))
32)
((and (<= ?a c) (>= ?z c)) (+ c (- ?A ?a)))
((and (<= ?A c) (>= ?Z c)) ?*)
(t ?@)))))
(sit-for 3)
(setq col nil)
(goto-char bot)
(while (< top (point))
(setq c (point))
(move-to-column 9)
(setq col (cons (buffer-substring (point) c) col))
; (let ((inhibit-point-motion-hooks t))
(end-of-line 0);)
(forward-char -10))
(let ((life-patterns (vector
(if (and col (search-forward "@" max t))
(cons (make-string (length (car col)) 32) col)
(list (mapconcat 'identity
(make-list (/ (- rtc 11) 15)
(make-string 5 ?@))
(make-string 10 32)))))))
(life (or zone-pgm-random-life-wait (random 4)))
(kill-buffer nil))))
;;;;;;;;;;;;;;;
(provide 'zone)
;;; zone.el ends here