lisp/play/zone.el

   1 ;;; zone.el --- idle display hacks
   2
   3 ;; Copyright (C) 2000, 2001 Free Software Foundation, Inc.
   4
   5 ;; Author: Victor Zandy <zandy@cs.wisc.edu>
   6 ;; Maintainer: Thien-Thi Nguyen <ttn@gnu.org>
   7 ;; Keywords: games
   8 ;; Created: June 6, 1998
   9
  10 ;; This file is part of GNU Emacs.
  11
  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 2, or (at your option)
  15 ;; any later version.
  16
  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.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25 ;; Boston, MA 02111-1307, USA.
  26
  27 ;;; Commentary:
  28
  29 ;; Don't zone out in front of Emacs!  Try M-x zone.
  30 ;; If it eventually irritates you, try M-x zone-leave-me-alone.
  31
  32 ;; Bored by the zone pyrotechnics?  Write your own!  Add it to
  33 ;; `zone-programs'.  See `zone-call' for higher-ordered zoning.
  34
  35 ;; WARNING: Not appropriate for Emacs sessions over modems or
  36 ;; computers as slow as mine.
  37
  38 ;; THANKS: Christopher Mayer, Scott Flinchbaugh, Rachel Kalmar,
  39 ;;         Max Froumentin.
  40
  41 ;;; Code:
  42
  43 (require 'timer)
  44 (require 'tabify)
  45 (eval-when-compile (require 'cl))
  46
  47 (defvar zone-timer nil
  48   "The timer we use to decide when to zone out, or nil if none.")
  49
  50 (defvar zone-timeout nil
  51   "*Seconds to timeout the zoning.
  52 If nil, don't interrupt for about 1^26 seconds.")
  53
  54 ;; Vector of functions that zone out.  `zone' will execute one of
  55 ;; these functions, randomly chosen.  The chosen function is invoked
  56 ;; in the *zone* buffer, which contains the text of the selected
  57 ;; window.  If the function loops, it *must* periodically check and
  58 ;; halt if `input-pending-p' is t (because quitting is disabled when
  59 ;; Emacs idle timers are run).
  60 (defvar zone-programs [
  61                        zone-pgm-jitter
  62                        zone-pgm-putz-with-case
  63                        zone-pgm-dissolve
  64                        ;; zone-pgm-explode
  65                        zone-pgm-whack-chars
  66                        zone-pgm-rotate
  67                        zone-pgm-rotate-LR-lockstep
  68                        zone-pgm-rotate-RL-lockstep
  69                        zone-pgm-rotate-LR-variable
  70                        zone-pgm-rotate-RL-variable
  71                        zone-pgm-drip
  72                        zone-pgm-drip-fretfully
  73                        zone-pgm-five-oclock-swan-dive
  74                        zone-pgm-martini-swan-dive
  75                        zone-pgm-paragraph-spaz
  76                        zone-pgm-stress
  77                        zone-pgm-stress-destress
  78                        ])
  79
  80 (defmacro zone-orig (&rest body)
  81   `(with-current-buffer (get 'zone 'orig-buffer)
  82      ,@body))
  83
  84 (defmacro zone-hiding-modeline (&rest body)
  85   `(let (bg mode-line-fg mode-line-bg mode-line-box)
  86      (unwind-protect
  87          (progn
  88            (when (and (= 0 (get 'zone 'modeline-hidden-level))
  89                       (display-color-p))
  90              (setq bg (face-background 'default)
  91                    mode-line-box (face-attribute 'mode-line :box)
  92                    mode-line-fg (face-attribute 'mode-line :foreground)
  93                    mode-line-bg (face-attribute 'mode-line :background))
  94              (set-face-attribute 'mode-line nil
  95                                  :foreground bg
  96                                  :background bg
  97                                  :box nil))
  98            (put 'zone 'modeline-hidden-level
  99                 (1+ (get 'zone 'modeline-hidden-level)))
 100            ,@body)
 101        (put 'zone 'modeline-hidden-level
 102             (1- (get 'zone 'modeline-hidden-level)))
 103        (when (and (> 1 (get 'zone 'modeline-hidden-level))
 104                   mode-line-fg)
 105          (set-face-attribute 'mode-line nil
 106                              :foreground mode-line-fg
 107                              :background mode-line-bg
 108                              :box mode-line-box)))))
 109
 110 (defun zone-call (program &optional timeout)
 111   "Call PROGRAM in a zoned way.
 112 If PROGRAM is a function, call it, interrupting after the amount
 113  of time in seconds specified by optional arg TIMEOUT, or `zone-timeout'
 114  if unspecified, q.v.
 115 PROGRAM can also be a list of elements, which are interpreted like so:
 116 If the element is a function or a list of a function and a number,
 117  apply `zone-call' recursively."
 118   (cond ((functionp program)
 119          (with-timeout ((or timeout zone-timeout (ash 1 26)))
 120            (funcall program)))
 121         ((listp program)
 122          (mapcar (lambda (elem)
 123                    (cond ((functionp elem) (zone-call elem))
 124                          ((and (listp elem)
 125                                (functionp (car elem))
 126                                (numberp (cadr elem)))
 127                           (apply 'zone-call elem))
 128                          (t (error "bad `zone-call' elem:" elem))))
 129                  program))))
 130
 131 ;;;###autoload
 132 (defun zone ()
 133   "Zone out, completely."
 134   (interactive)
 135   (let ((f (selected-frame))
 136         (outbuf (get-buffer-create "*zone*"))
 137         (text (buffer-substring (window-start) (window-end)))
 138         (wp (1+ (- (window-point (selected-window))
 139                    (window-start)))))
 140     (put 'zone 'orig-buffer (current-buffer))
 141     (put 'zone 'modeline-hidden-level 0)
 142     (set-buffer outbuf)
 143     (setq mode-name "Zone")
 144     (erase-buffer)
 145     (insert text)
 146     (switch-to-buffer outbuf)
 147     (setq buffer-undo-list t)
 148     (untabify (point-min) (point-max))
 149     (set-window-start (selected-window) (point-min))
 150     (set-window-point (selected-window) wp)
 151     (sit-for 0 500)
 152     (let ((pgm (elt zone-programs (random (length zone-programs))))
 153           (ct (and f (frame-parameter f 'cursor-type))))
 154       (when ct (modify-frame-parameters f '((cursor-type . (bar . 0)))))
 155       (condition-case nil
 156           (progn
 157             (message "Zoning... (%s)" pgm)
 158             (garbage-collect)
 159             ;; If some input is pending, zone says "sorry", which
 160             ;; isn't nice; this might happen e.g. when they invoke the
 161             ;; game by clicking the menu bar.  So discard any pending
 162             ;; input before zoning out.
 163             (if (input-pending-p)
 164                 (discard-input))
 165             (zone-call pgm)
 166             (message "Zoning...sorry"))
 167         (error
 168          (while (not (input-pending-p))
 169            (message (format "We were zoning when we wrote %s..." pgm))
 170            (sit-for 3)
 171            (message "...here's hoping we didn't hose your buffer!")
 172            (sit-for 3)))
 173         (quit (ding) (message "Zoning...sorry")))
 174       (when ct (modify-frame-parameters f (list (cons 'cursor-type ct)))))
 175     (kill-buffer outbuf)))
 176
 177 ;;;; Zone when idle, or not.
 178
 179 (defun zone-when-idle (secs)
 180   "Zone out when Emacs has been idle for SECS seconds."
 181   (interactive "nHow long before I start zoning (seconds): ")
 182   (if (timerp zone-timer)
 183       (cancel-timer zone-timer))
 184   (setq zone-timer nil)
 185   (or (<= secs 0)
 186       (setq zone-timer (run-with-idle-timer secs t 'zone))))
 187
 188 (defun zone-leave-me-alone ()
 189   "Don't zone out when Emacs is idle."
 190   (interactive)
 191   (if (timerp zone-timer)
 192       (cancel-timer zone-timer))
 193   (setq zone-timer nil)
 194   (message "I won't zone out any more"))
 195
 196
 197 ;;;; zone-pgm-jitter
 198
 199 (defun zone-shift-up ()
 200   (let* ((b (point))
 201          (e (progn
 202               (end-of-line)
 203               (if (looking-at "\n") (1+ (point)) (point))))
 204          (s (buffer-substring b e)))
 205     (delete-region b e)
 206     (goto-char (point-max))
 207     (insert s)))
 208
 209 (defun zone-shift-down ()
 210   (goto-char (point-max))
 211   (forward-line -1)
 212   (beginning-of-line)
 213   (let* ((b (point))
 214          (e (progn
 215               (end-of-line)
 216               (if (looking-at "\n") (1+ (point)) (point))))
 217          (s (buffer-substring b e)))
 218     (delete-region b e)
 219     (goto-char (point-min))
 220     (insert s)))
 221
 222 (defun zone-shift-left ()
 223   (while (not (eobp))
 224     (or (eolp)
 225         (let ((c (following-char)))
 226           (delete-char 1)
 227           (end-of-line)
 228           (insert c)))
 229     (forward-line 1)))
 230
 231 (defun zone-shift-right ()
 232   (while (not (eobp))
 233     (end-of-line)
 234     (or (bolp)
 235         (let ((c (preceding-char)))
 236           (delete-backward-char 1)
 237           (beginning-of-line)
 238           (insert c)))
 239     (forward-line 1)))
 240
 241 (defun zone-pgm-jitter ()
 242   (let ((ops [
 243               zone-shift-left
 244               zone-shift-left
 245               zone-shift-left
 246               zone-shift-left
 247               zone-shift-right
 248               zone-shift-down
 249               zone-shift-down
 250               zone-shift-down
 251               zone-shift-down
 252               zone-shift-down
 253               zone-shift-up
 254               ]))
 255     (goto-char (point-min))
 256     (while (not (input-pending-p))
 257       (funcall (elt ops (random (length ops))))
 258       (goto-char (point-min))
 259       (sit-for 0 10))))
 260
 261
 262 ;;;; zone-pgm-whack-chars
 263
 264 (defun zone-pgm-whack-chars ()
 265   (let ((tbl (copy-sequence (get 'zone-pgm-whack-chars 'wc-tbl))))
 266     (while (not (input-pending-p))
 267       (let ((i 48))
 268         (while (< i 122)
 269           (aset tbl i (+ 48 (random (- 123 48))))
 270           (setq i (1+ i)))
 271         (translate-region (point-min) (point-max) tbl)
 272         (sit-for 0 2)))))
 273
 274 (put 'zone-pgm-whack-chars 'wc-tbl
 275      (let ((tbl (make-string 128 ?x))
 276            (i 0))
 277        (while (< i 128)
 278          (aset tbl i i)
 279          (setq i (1+ i)))
 280        tbl))
 281
 282 ;;;; zone-pgm-dissolve
 283
 284 (defun zone-remove-text ()
 285   (let ((working t))
 286     (while working
 287       (setq working nil)
 288       (save-excursion
 289         (goto-char (point-min))
 290         (while (not (eobp))
 291           (if (looking-at "[^(){}\n\t ]")
 292               (let ((n (random 5)))
 293                 (if (not (= n 0))
 294                     (progn
 295                       (setq working t)
 296                       (forward-char 1))
 297                   (delete-char 1)
 298                   (insert " ")))
 299             (forward-char 1))))
 300       (sit-for 0 2))))
 301
 302 (defun zone-pgm-dissolve ()
 303   (zone-remove-text)
 304   (zone-pgm-jitter))
 305
 306
 307 ;;;; zone-pgm-explode
 308
 309 (defun zone-exploding-remove ()
 310   (let ((i 0))
 311     (while (< i 20)
 312       (save-excursion
 313         (goto-char (point-min))
 314         (while (not (eobp))
 315           (if (looking-at "[^*\n\t ]")
 316               (let ((n (random 5)))
 317                 (if (not (= n 0))
 318                     (forward-char 1))
 319                 (insert " ")))
 320           (forward-char 1)))
 321       (setq i (1+ i))
 322       (sit-for 0 2)))
 323   (zone-pgm-jitter))
 324
 325 (defun zone-pgm-explode ()
 326   (zone-exploding-remove)
 327   (zone-pgm-jitter))
 328
 329
 330 ;;;; zone-pgm-putz-with-case
 331
 332 ;; Faster than `zone-pgm-putz-with-case', but not as good: all
 333 ;; instances of the same letter have the same case, which produces a
 334 ;; less interesting effect than you might imagine.
 335 (defun zone-pgm-2nd-putz-with-case ()
 336   (let ((tbl (make-string 128 ?x))
 337         (i 0))
 338     (while (< i 128)
 339       (aset tbl i i)
 340       (setq i (1+ i)))
 341     (while (not (input-pending-p))
 342       (setq i ?a)
 343       (while (<= i ?z)
 344         (aset tbl i
 345               (if (zerop (random 5))
 346                   (upcase i)
 347                 (downcase i)))
 348         (setq i (+ i (1+ (random 5)))))
 349       (setq i ?A)
 350       (while (<= i ?z)
 351         (aset tbl i
 352               (if (zerop (random 5))
 353                   (downcase i)
 354                 (upcase i)))
 355         (setq i (+ i (1+ (random 5)))))
 356       (translate-region (point-min) (point-max) tbl)
 357       (sit-for 0 2))))
 358
 359 (defun zone-pgm-putz-with-case ()
 360   (goto-char (point-min))
 361   (while (not (input-pending-p))
 362     (let ((np (+ 2 (random 5)))
 363           (pm (point-max)))
 364       (while (< np pm)
 365         (goto-char np)
 366         (let ((prec (preceding-char))
 367               (props (text-properties-at (1- (point)))))
 368           (insert (if (zerop (random 2))
 369                       (upcase prec)
 370                     (downcase prec)))
 371           (set-text-properties (1- (point)) (point) props))
 372         (backward-char 2)
 373         (delete-char 1)
 374         (setq np (+ np (1+ (random 5))))))
 375     (goto-char (point-min))
 376     (sit-for 0 2)))
 377
 378
 379 ;;;; zone-pgm-rotate
 380
 381 (defun zone-line-specs ()
 382   (let (ret)
 383     (save-excursion
 384       (goto-char (window-start))
 385       (while (< (point) (window-end))
 386         (when (looking-at "[\t ]*\\([^\n]+\\)")
 387           (setq ret (cons (cons (match-beginning 1) (match-end 1)) ret)))
 388         (forward-line 1)))
 389     ret))
 390
 391 (defun zone-pgm-rotate (&optional random-style)
 392   (let* ((specs (apply
 393                  'vector
 394                  (let (res)
 395                    (mapcar (lambda (ent)
 396                              (let* ((beg (car ent))
 397                                     (end (cdr ent))
 398                                     (amt (if random-style
 399                                              (funcall random-style)
 400                                            (- (random 7) 3))))
 401                                (when (< (- end (abs amt)) beg)
 402                                  (setq amt (random (- end beg))))
 403                                (unless (= 0 amt)
 404                                  (setq res
 405                                        (cons
 406                                         (vector amt beg (- end (abs amt)))
 407                                         res)))))
 408                            (zone-line-specs))
 409                    res)))
 410          (n (length specs))
 411          amt aamt cut paste txt i ent)
 412     (while (not (input-pending-p))
 413       (setq i 0)
 414       (while (< i n)
 415         (setq ent (aref specs i))
 416         (setq amt (aref ent 0) aamt (abs amt))
 417         (if (> 0 amt)
 418             (setq cut 1 paste 2)
 419           (setq cut 2 paste 1))
 420         (goto-char (aref ent cut))
 421         (setq txt (buffer-substring (point) (+ (point) aamt)))
 422         (delete-char aamt)
 423         (goto-char (aref ent paste))
 424         (insert txt)
 425         (setq i (1+ i)))
 426       (sit-for 0.04))))
 427
 428 (defun zone-pgm-rotate-LR-lockstep ()
 429   (zone-pgm-rotate (lambda () 1)))
 430
 431 (defun zone-pgm-rotate-RL-lockstep ()
 432   (zone-pgm-rotate (lambda () -1)))
 433
 434 (defun zone-pgm-rotate-LR-variable ()
 435   (zone-pgm-rotate (lambda () (1+ (random 3)))))
 436
 437 (defun zone-pgm-rotate-RL-variable ()
 438   (zone-pgm-rotate (lambda () (1- (- (random 3))))))
 439
 440
 441 ;;;; zone-pgm-drip
 442
 443 (defun zone-cpos (pos)
 444   (buffer-substring pos (1+ pos)))
 445
 446 (defun zone-fret (pos)
 447   (let* ((case-fold-search nil)
 448          (c-string (zone-cpos pos))
 449          (hmm (cond
 450                ((string-match "[a-z]" c-string) (upcase c-string))
 451                ((string-match "[A-Z]" c-string) (downcase c-string))
 452                (t " "))))
 453     (do ((i 0 (1+ i))
 454          (wait 0.5 (* wait 0.8)))
 455         ((= i 20))
 456       (goto-char pos)
 457       (delete-char 1)
 458       (insert (if (= 0 (% i 2)) hmm c-string))
 459       (sit-for wait))
 460     (delete-char -1) (insert c-string)))
 461
 462 (defun zone-fall-through-ws (c col wend)
 463   (let ((fall-p nil)                    ; todo: move outward
 464         (wait 0.15)
 465         (o (point))                     ; for terminals w/o cursor hiding
 466         (p (point)))
 467     (while (progn
 468              (forward-line 1)
 469              (move-to-column col)
 470              (looking-at " "))
 471       (setq fall-p t)
 472       (delete-char 1)
 473       (insert (if (< (point) wend) c " "))
 474       (save-excursion
 475         (goto-char p)
 476         (delete-char 1)
 477         (insert " ")
 478         (goto-char o)
 479         (sit-for (setq wait (* wait 0.8))))
 480       (setq p (1- (point))))
 481     fall-p))
 482
 483 (defun zone-pgm-drip (&optional fret-p pancake-p)
 484   (let* ((ww (1- (window-width)))
 485          (wh (window-height))
 486          (mc 0)                         ; miss count
 487          (total (* ww wh))
 488          (fall-p nil))
 489     (goto-char (point-min))
 490     ;; fill out rectangular ws block
 491     (while (not (eobp))
 492       (end-of-line)
 493       (let ((cc (current-column)))
 494         (if (< cc ww)
 495             (insert (make-string (- ww cc) ? ))
 496           (delete-char (- ww cc))))
 497       (unless (eobp)
 498         (forward-char 1)))
 499     ;; pad ws past bottom of screen
 500     (let ((nl (- wh (count-lines (point-min) (point)))))
 501       (when (> nl 0)
 502         (let ((line (concat (make-string (1- ww) ? ) "\n")))
 503           (do ((i 0 (1+ i)))
 504               ((= i nl))
 505             (insert line)))))
 506     (catch 'done
 507       (while (not (input-pending-p))
 508         (goto-char (point-min))
 509         (sit-for 0)
 510         (let ((wbeg (window-start))
 511               (wend (window-end)))
 512           (setq mc 0)
 513           ;; select non-ws character, but don't miss too much
 514           (goto-char (+ wbeg (random (- wend wbeg))))
 515           (while (looking-at "[ \n\f]")
 516             (if (= total (setq mc (1+ mc)))
 517                 (throw 'done 'sel)
 518               (goto-char (+ wbeg (random (- wend wbeg))))))
 519           ;; character animation sequence
 520           (let ((p (point)))
 521             (when fret-p (zone-fret p))
 522             (goto-char p)
 523             (setq fall-p (zone-fall-through-ws
 524                           (zone-cpos p) (current-column) wend))))
 525         ;; assuming current-column has not changed...
 526         (when (and pancake-p
 527                    fall-p
 528                    (< (count-lines (point-min) (point))
 529                       wh))
 530           (previous-line 1)
 531           (forward-char 1)
 532           (sit-for 0.137)
 533           (delete-char -1)
 534           (insert "@")
 535           (sit-for 0.137)
 536           (delete-char -1)
 537           (insert "*")
 538           (sit-for 0.137)
 539           (delete-char -1)
 540           (insert "_"))))))
 541
 542 (defun zone-pgm-drip-fretfully ()
 543   (zone-pgm-drip t))
 544
 545 (defun zone-pgm-five-oclock-swan-dive ()
 546   (zone-pgm-drip nil t))
 547
 548 (defun zone-pgm-martini-swan-dive ()
 549   (zone-pgm-drip t t))
 550
 551
 552 ;;;; zone-pgm-paragraph-spaz
 553
 554 (defun zone-pgm-paragraph-spaz ()
 555   (if (memq (zone-orig major-mode) '(text-mode fundamental-mode))
 556       (let ((fill-column fill-column)
 557             (fc-min fill-column)
 558             (fc-max fill-column)
 559             (max-fc (1- (frame-width))))
 560         (while (sit-for 0.1)
 561           (fill-paragraph 1)
 562           (setq fill-column (+ fill-column (- (random 5) 2)))
 563           (when (< fill-column fc-min)
 564             (setq fc-min fill-column))
 565           (when (> fill-column max-fc)
 566             (setq fill-column max-fc))
 567           (when (> fill-column fc-max)
 568             (setq fc-max fill-column))))
 569     (message "Zoning... (zone-pgm-rotate)")
 570     (zone-pgm-rotate)))
 571
 572
 573 ;;;; zone-pgm-stress
 574
 575 (defun zone-pgm-stress ()
 576   (goto-char (point-min))
 577   (let (lines)
 578     (while (< (point) (point-max))
 579       (let ((p (point)))
 580         (forward-line 1)
 581         (setq lines (cons (buffer-substring p (point)) lines))))
 582     (sit-for 5)
 583     (zone-hiding-modeline
 584      (let ((msg "Zoning... (zone-pgm-stress)"))
 585        (while (not (string= msg ""))
 586          (message (setq msg (substring msg 1)))
 587          (sit-for 0.05)))
 588      (while (not (input-pending-p))
 589        (when (< 50 (random 100))
 590          (goto-char (point-max))
 591          (forward-line -1)
 592          (let ((kill-whole-line t))
 593            (kill-line))
 594          (goto-char (point-min))
 595          (insert (nth (random (length lines)) lines)))
 596        (message (concat (make-string (random (- (frame-width) 5)) ? ) "grrr"))
 597        (sit-for 0.1)))))
 598
 599
 600 ;;;; zone-pgm-stress-destress
 601
 602 (defun zone-pgm-stress-destress ()
 603   (zone-call 'zone-pgm-stress 25)
 604   (zone-hiding-modeline
 605    (sit-for 3)
 606    (erase-buffer)
 607    (sit-for 3)
 608    (insert-buffer "*Messages*")
 609    (message "")
 610    (goto-char (point-max))
 611    (recenter -1)
 612    (sit-for 3)
 613    (delete-region (point-min) (window-start))
 614    (message "hey why stress out anyway?")
 615    (zone-call '((zone-pgm-rotate         30)
 616                 (zone-pgm-whack-chars    10)
 617                 zone-pgm-drip))))
 618
 619
 620 ;;;;;;;;;;;;;;;
 621 (provide 'zone)
 622
 623 ;;; zone.el ends here