lisp/type-break.el

   1 ;;; type-break.el --- encourage rests from typing at appropriate intervals
   2
   3 ;; Copyright (C) 1994-1995, 1997, 2000-2011  Free Software Foundation, Inc.
   4
   5 ;; Author: Noah Friedman
   6 ;; Maintainer: Noah Friedman <friedman@splode.com>
   7 ;; Keywords: extensions, timers
   8 ;; Created: 1994-07-13
   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 3 of the License, or
  15 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; The docstring for the function `type-break-mode' summarizes most of the
  28 ;; details of the interface.
  29
  30 ;; This package relies on the assumption that you live entirely in Emacs,
  31 ;; as the author does.  If that's not the case for you (e.g. you often
  32 ;; suspend Emacs or work in other windows) then this won't help very much;
  33 ;; it will depend on just how often you switch back to Emacs.  At the very
  34 ;; least, you will want to turn off the keystroke thresholds and rest
  35 ;; interval tracking.
  36
  37 ;; If you prefer not to be queried about taking breaks, but instead just
  38 ;; want to be reminded, do the following:
  39 ;;
  40 ;;   (setq type-break-query-mode nil)
  41 ;;
  42 ;; Or call the command `type-break-query-mode' with a negative prefix
  43 ;; argument.
  44
  45 ;; If you find echo area messages annoying and would prefer to see messages
  46 ;; in the mode line instead, do M-x type-break-mode-line-message-mode
  47 ;; or set the variable of the same name to `t'.
  48
  49 ;; This program can truly cons up a storm because of all the calls to
  50 ;; `current-time' (which always returns 3 fresh conses).  I'm dismayed by
  51 ;; this, but I think the health of my hands is far more important than a
  52 ;; few pages of virtual memory.
  53
  54 ;; This program has no hope of working in Emacs 18.
  55
  56 ;; This package was inspired by Roland McGrath's hanoi-break.el.
  57 ;; Several people contributed feedback and ideas, including
  58 ;;      Roland McGrath <roland@gnu.org>
  59 ;;      Kleanthes Koniaris <kgk@koniaris.com>
  60 ;;      Mark Ashton <mpashton@gnu.org>
  61 ;;      Matt Wilding <wilding@cli.com>
  62 ;;      Robert S. Boyer <boyer@cs.utexas.edu>
  63
  64 ;;; Code:
  65
  66 \f
  67 (defgroup type-break nil
  68   "Encourage the user to take a rest from typing at suitable intervals."
  69   :prefix "type-break"
  70   :group 'keyboard)
  71
  72 ;;;###autoload
  73 (defcustom type-break-mode nil
  74   "Toggle typing break mode.
  75 See the docstring for the `type-break-mode' command for more information.
  76 Setting this variable directly does not take effect;
  77 use either \\[customize] or the function `type-break-mode'."
  78   :set (lambda (_symbol value)
  79          (type-break-mode (if value 1 -1)))
  80   :initialize 'custom-initialize-default
  81   :type 'boolean
  82   :group 'type-break
  83   :require 'type-break)
  84
  85 ;;;###autoload
  86 (defcustom type-break-interval (* 60 60)
  87   "Number of seconds between scheduled typing breaks."
  88   :type 'integer
  89   :group 'type-break)
  90
  91 ;;;###autoload
  92 (defcustom type-break-good-rest-interval (/ type-break-interval 6)
  93   "Number of seconds of idle time considered to be an adequate typing rest.
  94
  95 When this variable is non-nil, Emacs checks the idle time between
  96 keystrokes.  If this idle time is long enough to be considered a \"good\"
  97 rest from typing, then the next typing break is simply rescheduled for later.
  98
  99 If a break is interrupted before this much time elapses, the user will be
 100 asked whether or not really to interrupt the break."
 101   :type 'integer
 102   :group 'type-break)
 103
 104 ;;;###autoload
 105 (defcustom type-break-good-break-interval nil
 106   "Number of seconds considered to be an adequate explicit typing rest.
 107
 108 When this variable is non-nil, its value is considered to be a \"good\"
 109 length (in seconds) for a break initiated by the command `type-break',
 110 overriding `type-break-good-rest-interval'.  This provides querying of
 111 break interruptions when `type-break-good-rest-interval' is nil."
 112   :type 'integer
 113   :group 'type-break)
 114
 115 ;;;###autoload
 116 (defcustom type-break-keystroke-threshold
 117   ;; Assuming typing speed is 35wpm (on the average, do you really
 118   ;; type more than that in a minute?  I spend a lot of time reading mail
 119   ;; and simply studying code in buffers) and average word length is
 120   ;; about 5 letters, default upper threshold to the average number of
 121   ;; keystrokes one is likely to type in a break interval.  That way if the
 122   ;; user goes through a furious burst of typing activity, cause a typing
 123   ;; break to be required sooner than originally scheduled.
 124   ;; Conversely, the minimum threshold should be about a fifth of this.
 125   (let* ((wpm 35)
 126          (avg-word-length 5)
 127          (upper (* wpm avg-word-length (/ type-break-interval 60)))
 128          (lower (/ upper 5)))
 129     (cons lower upper))
 130   "Upper and lower bound on number of keystrokes for considering typing break.
 131 This structure is a pair of numbers (MIN . MAX).
 132
 133 The first number is the minimum number of keystrokes that must have been
 134 entered since the last typing break before considering another one, even if
 135 the scheduled time has elapsed; the break is simply rescheduled until later
 136 if the minimum threshold hasn't been reached.  If this first value is nil,
 137 then there is no minimum threshold; as soon as the scheduled time has
 138 elapsed, the user will always be queried.
 139
 140 The second number is the maximum number of keystrokes that can be entered
 141 before a typing break is requested immediately, pre-empting the originally
 142 scheduled break.  If this second value is nil, then no pre-emptive breaks
 143 will occur; only scheduled ones will.
 144
 145 Keys with bucky bits (shift, control, meta, etc) are counted as only one
 146 keystroke even though they really require multiple keys to generate them.
 147
 148 The command `type-break-guesstimate-keystroke-threshold' can be used to
 149 guess a reasonably good pair of values for this variable."
 150   :type 'sexp
 151   :group 'type-break)
 152
 153 (defcustom type-break-query-function 'yes-or-no-p
 154   "Function to use for making query for a typing break.
 155 It should take a string as an argument, the prompt.
 156 Usually this should be set to `yes-or-no-p' or `y-or-n-p'.
 157
 158 To avoid being queried at all, set `type-break-query-mode' to nil."
 159   :type '(radio function
 160                 (function-item yes-or-no-p)
 161                 (function-item y-or-n-p))
 162   :group 'type-break)
 163
 164 (defcustom type-break-query-interval 60
 165   "Number of seconds between queries to take a break, if put off.
 166 The user will continue to be prompted at this interval until he or she
 167 finally submits to taking a typing break."
 168   :type 'integer
 169   :group 'type-break)
 170
 171 (defcustom type-break-time-warning-intervals '(300 120 60 30)
 172   "List of time intervals for warnings about upcoming typing break.
 173 At each of the intervals (specified in seconds) away from a scheduled
 174 typing break, print a warning in the echo area."
 175   :type '(repeat integer)
 176   :group 'type-break)
 177
 178 (defcustom type-break-keystroke-warning-intervals '(300 200 100 50)
 179   "List of keystroke measurements for warnings about upcoming typing break.
 180 At each of the intervals (specified in keystrokes) away from the upper
 181 keystroke threshold, print a warning in the echo area.
 182 If either this variable or the upper threshold is set, then no warnings
 183 will occur."
 184   :type '(repeat integer)
 185   :group 'type-break)
 186
 187 (defcustom type-break-warning-repeat 40
 188   "Number of keystrokes for which warnings should be repeated.
 189 That is, for each of this many keystrokes the warning is redisplayed
 190 in the echo area to make sure it's really seen."
 191   :type 'integer
 192   :group 'type-break)
 193
 194 (defcustom type-break-time-stamp-format "[%H:%M] "
 195   "Timestamp format used to prefix messages.
 196 Format specifiers are as used by `format-time-string'."
 197   :type 'string
 198   :group 'type-break)
 199
 200 (defcustom type-break-demo-functions
 201   '(type-break-demo-boring type-break-demo-life type-break-demo-hanoi)
 202   "List of functions to consider running as demos during typing breaks.
 203 When a typing break begins, one of these functions is selected randomly
 204 to have Emacs do something interesting.
 205
 206 Any function in this list should start a demo which ceases as soon as a
 207 key is pressed."
 208   :type '(repeat function)
 209   :group 'type-break)
 210
 211 (defcustom type-break-demo-boring-stats nil
 212   "Show word per minute and keystroke figures in the Boring demo."
 213   :type 'boolean
 214   :group 'type-break)
 215
 216 (defcustom type-break-terse-messages nil
 217   "Use slightly terser messages."
 218   :type 'boolean
 219   :group 'type-break)
 220
 221 (defcustom type-break-file-name (convert-standard-filename "~/.type-break")
 222   "Name of file used to save state across sessions.
 223 If this is nil, no data will be saved across sessions."
 224   :type 'file
 225   :group 'type-break)
 226
 227 (defvar type-break-post-command-hook '(type-break-check)
 228   "Hook run indirectly by `post-command-hook' for typing break functions.
 229 This is not really intended to be set by the user, but it's probably
 230 harmless to do so.  Mainly it is used by various parts of the typing break
 231 program to delay actions until after the user has completed some command.
 232 It exists because `post-command-hook' itself is inaccessible while its
 233 functions are being run, and some type-break--related functions want to
 234 remove themselves after running.")
 235
 236 \f
 237 ;; Mode line frobs
 238
 239 (defvar type-break-mode-line-format
 240   '(type-break-mode-line-message-mode
 241     (""
 242      type-break-mode-line-break-message
 243      type-break-mode-line-warning))
 244   "*Format of messages in the mode line concerning typing breaks.")
 245
 246 (defvar type-break-mode-line-break-message
 247   '(type-break-mode-line-break-message-p
 248     type-break-mode-line-break-string))
 249
 250 (defvar type-break-mode-line-break-message-p nil)
 251 (defvar type-break-mode-line-break-string " *** TAKE A TYPING BREAK NOW ***")
 252
 253 (defvar type-break-mode-line-warning
 254       '(type-break-mode-line-break-message-p
 255         ("")
 256         (type-break-warning-countdown-string
 257          (" *** "
 258           "Break in "
 259           type-break-warning-countdown-string
 260           " "
 261           type-break-warning-countdown-string-type
 262           "***"))))
 263
 264 (defvar type-break-warning-countdown-string nil
 265   "If non-nil, this is a countdown for the next typing break.
 266
 267 This variable, in conjunction with `type-break-warning-countdown-string-type'
 268 \(which indicates whether this value is a number of keystrokes or seconds)
 269 is installed in `mode-line-format' to notify of imminent typing breaks.")
 270
 271 (defvar type-break-warning-countdown-string-type nil
 272   "Indicates the unit type of `type-break-warning-countdown-string'.
 273 It will be either \"seconds\" or \"keystrokes\".")
 274
 275 \f
 276 ;; These are internal variables.  Do not set them yourself.
 277
 278 (defvar type-break-alarm-p nil)
 279 (defvar type-break-keystroke-count 0)
 280 (defvar type-break-time-last-break nil)
 281 (defvar type-break-time-next-break nil)
 282 (defvar type-break-time-last-command (current-time))
 283 (defvar type-break-current-time-warning-interval nil)
 284 (defvar type-break-current-keystroke-warning-interval nil)
 285 (defvar type-break-time-warning-count 0)
 286 (defvar type-break-keystroke-warning-count 0)
 287 (defvar type-break-interval-start nil)
 288
 289 \f
 290 ;;;###autoload
 291 (defun type-break-mode (&optional prefix)
 292   "Enable or disable typing-break mode.
 293 This is a minor mode, but it is global to all buffers by default.
 294
 295 When this mode is enabled, the user is encouraged to take typing breaks at
 296 appropriate intervals; either after a specified amount of time or when the
 297 user has exceeded a keystroke threshold.  When the time arrives, the user
 298 is asked to take a break.  If the user refuses at that time, Emacs will ask
 299 again in a short period of time.  The idea is to give the user enough time
 300 to find a good breaking point in his or her work, but be sufficiently
 301 annoying to discourage putting typing breaks off indefinitely.
 302
 303 A negative prefix argument disables this mode.
 304 No argument or any non-negative argument enables it.
 305
 306 The user may enable or disable this mode by setting the variable of the
 307 same name, though setting it in that way doesn't reschedule a break or
 308 reset the keystroke counter.
 309
 310 If the mode was previously disabled and is enabled as a consequence of
 311 calling this function, it schedules a break with `type-break-schedule' to
 312 make sure one occurs (the user can call that command to reschedule the
 313 break at any time).  It also initializes the keystroke counter.
 314
 315 The variable `type-break-interval' specifies the number of seconds to
 316 schedule between regular typing breaks.  This variable doesn't directly
 317 affect the time schedule; it simply provides a default for the
 318 `type-break-schedule' command.
 319
 320 If set, the variable `type-break-good-rest-interval' specifies the minimum
 321 amount of time which is considered a reasonable typing break.  Whenever
 322 that time has elapsed, typing breaks are automatically rescheduled for
 323 later even if Emacs didn't prompt you to take one first.  Also, if a break
 324 is ended before this much time has elapsed, the user will be asked whether
 325 or not to continue.  A nil value for this variable prevents automatic
 326 break rescheduling, making `type-break-interval' an upper bound on the time
 327 between breaks.  In this case breaks will be prompted for as usual before
 328 the upper bound if the keystroke threshold is reached.
 329
 330 If `type-break-good-rest-interval' is nil and
 331 `type-break-good-break-interval' is set, then confirmation is required to
 332 interrupt a break before `type-break-good-break-interval' seconds
 333 have passed.  This provides for an upper bound on the time between breaks
 334 together with confirmation of interruptions to these breaks.
 335
 336 The variable `type-break-keystroke-threshold' is used to determine the
 337 thresholds at which typing breaks should be considered.  You can use
 338 the command `type-break-guesstimate-keystroke-threshold' to try to
 339 approximate good values for this.
 340
 341 There are several variables that affect how or when warning messages about
 342 imminent typing breaks are displayed.  They include:
 343
 344         `type-break-mode-line-message-mode'
 345         `type-break-time-warning-intervals'
 346         `type-break-keystroke-warning-intervals'
 347         `type-break-warning-repeat'
 348         `type-break-warning-countdown-string'
 349         `type-break-warning-countdown-string-type'
 350
 351 There are several variables that affect if, how, and when queries to begin
 352 a typing break occur.  They include:
 353
 354         `type-break-query-mode'
 355         `type-break-query-function'
 356         `type-break-query-interval'
 357
 358 The command `type-break-statistics' prints interesting things.
 359
 360 Finally, a file (named `type-break-file-name') is used to store information
 361 across Emacs sessions.  This provides recovery of the break status between
 362 sessions and after a crash.  Manual changes to the file may result in
 363 problems."
 364   (interactive "P")
 365   (type-break-check-post-command-hook)
 366
 367   (let ((already-enabled type-break-mode))
 368     (setq type-break-mode (>= (prefix-numeric-value prefix) 0))
 369
 370     (cond
 371      ((and already-enabled type-break-mode)
 372       (and (called-interactively-p 'interactive)
 373            (message "Type Break mode is already enabled")))
 374      (type-break-mode
 375       (when type-break-file-name
 376         (with-current-buffer (find-file-noselect type-break-file-name 'nowarn)
 377           (setq buffer-save-without-query t)))
 378
 379       (or global-mode-string
 380           (setq global-mode-string '("")))
 381       (or (assq 'type-break-mode-line-message-mode
 382                 minor-mode-alist)
 383           (setq minor-mode-alist
 384                 (cons type-break-mode-line-format
 385                       minor-mode-alist)))
 386       (type-break-keystroke-reset)
 387       (type-break-mode-line-countdown-or-break nil)
 388
 389       (setq type-break-time-last-break
 390             (or (type-break-get-previous-time)
 391                 (current-time)))
 392
 393       ;; schedule according to break time from session file
 394       (type-break-schedule
 395        (let (diff)
 396          (if (and type-break-time-last-break
 397                   (< (setq diff (type-break-time-difference
 398                                  type-break-time-last-break
 399                                  (current-time)))
 400                      type-break-interval))
 401              ;; use the file's value
 402              (progn
 403                (setq type-break-keystroke-count
 404                      (type-break-get-previous-count))
 405                ;; file the time, in case it was read from the auto-save file
 406                (type-break-file-time type-break-interval-start)
 407                (setq type-break-interval-start type-break-time-last-break)
 408                (- type-break-interval diff))
 409            ;; schedule from now
 410            (setq type-break-interval-start (current-time))
 411            (type-break-file-time type-break-interval-start)
 412            type-break-interval))
 413        type-break-interval-start
 414        type-break-interval)
 415
 416       (and (called-interactively-p 'interactive)
 417            (message "Type Break mode is enabled and set")))
 418      (t
 419       (type-break-keystroke-reset)
 420       (type-break-mode-line-countdown-or-break nil)
 421       (type-break-cancel-schedule)
 422       (do-auto-save)
 423       (when type-break-file-name
 424         (with-current-buffer (find-file-noselect type-break-file-name
 425                                                  'nowarn)
 426           (set-buffer-modified-p nil)
 427           (unlock-buffer)
 428           (kill-this-buffer)))
 429       (and (called-interactively-p 'interactive)
 430            (message "Type Break mode is disabled")))))
 431   type-break-mode)
 432
 433 (define-minor-mode type-break-mode-line-message-mode
 434   "Enable or disable warnings in the mode line about typing breaks.
 435
 436 A negative PREFIX argument disables this mode.
 437 No argument or any non-negative argument enables it.
 438
 439 The user may also enable or disable this mode simply by setting the
 440 variable of the same name.
 441
 442 Variables controlling the display of messages in the mode line include:
 443
 444         `mode-line-format'
 445         `global-mode-string'
 446         `type-break-mode-line-break-message'
 447         `type-break-mode-line-warning'"
 448   :global t)
 449
 450 (define-minor-mode type-break-query-mode
 451   "Enable or disable warnings in the mode line about typing breaks.
 452
 453 When enabled, the user is periodically queried about whether to take a
 454 typing break at that moment.  The function which does this query is
 455 specified by the variable `type-break-query-function'.
 456
 457 A negative PREFIX argument disables this mode.
 458 No argument or any non-negative argument enables it.
 459
 460 The user may also enable or disable this mode simply by setting the
 461 variable of the same name."
 462   :global t)
 463
 464 \f
 465 ;;; session file functions
 466
 467 (defvar type-break-auto-save-file-name
 468   (let ((buffer-file-name type-break-file-name))
 469     (make-auto-save-file-name))
 470   "Auto-save name of `type-break-file-name'.")
 471
 472 (defun type-break-file-time (&optional time)
 473   "File break time in `type-break-file-name', unless the file is locked."
 474   (if (and type-break-file-name
 475            (not (stringp (file-locked-p type-break-file-name))))
 476       (with-current-buffer (find-file-noselect type-break-file-name
 477                                                'nowarn)
 478         (let ((inhibit-read-only t))
 479           (erase-buffer)
 480           (insert (format "%s\n\n" (or time type-break-interval-start)))
 481           ;; file saving is left to auto-save
 482           ))))
 483
 484 (defun type-break-file-keystroke-count ()
 485   "File keystroke count in `type-break-file-name', unless the file is locked."
 486   (if (and type-break-file-name
 487            (not (stringp (file-locked-p type-break-file-name))))
 488       ;; Prevent deactivation of the mark in some other buffer.
 489       (let (deactivate-mark)
 490         (with-current-buffer (find-file-noselect type-break-file-name
 491                                                  'nowarn)
 492           (save-excursion
 493             (let ((inhibit-read-only t))
 494               (goto-char (point-min))
 495               (forward-line)
 496               (delete-region (point) (line-end-position))
 497               (insert (format "%s" type-break-keystroke-count))
 498               ;; file saving is left to auto-save
 499               ))))))
 500
 501 (defun timep (time)
 502   "If TIME is in the format returned by `current-time' then
 503 return TIME, else return nil."
 504   (and (listp time)
 505        (eq (length time) 3)
 506        (integerp (car time))
 507        (integerp (nth 1 time))
 508        (integerp (nth 2 time))
 509        time))
 510
 511 (defun type-break-choose-file ()
 512   "Return file to read from."
 513   (cond
 514    ((not type-break-file-name)
 515     nil)
 516    ((and (file-exists-p type-break-auto-save-file-name)
 517          (file-readable-p type-break-auto-save-file-name))
 518     type-break-auto-save-file-name)
 519    ((and (file-exists-p type-break-file-name)
 520          (file-readable-p type-break-file-name))
 521     type-break-file-name)
 522    (t nil)))
 523
 524 (defun type-break-get-previous-time ()
 525   "Get previous break time from `type-break-file-name'.
 526 Returns nil if the file is missing or if the time breaks with the
 527 `current-time' format."
 528   (let ((file (type-break-choose-file)))
 529     (if file
 530         (timep ;; returns expected format, else nil
 531          (with-current-buffer (find-file-noselect file 'nowarn)
 532            (condition-case nil
 533                (save-excursion
 534                  (goto-char (point-min))
 535                  (read (current-buffer)))
 536              (end-of-file
 537               (error "End of file in `%s'" file))))))))
 538
 539 (defun type-break-get-previous-count ()
 540   "Get previous keystroke count from `type-break-file-name'.
 541 Return 0 if the file is missing or if the form read is not an
 542 integer."
 543   (let ((file (type-break-choose-file)))
 544     (if (and file
 545              (integerp
 546               (setq file
 547                     (with-current-buffer
 548                         (find-file-noselect file 'nowarn)
 549                     (condition-case nil
 550                         (save-excursion
 551                           (goto-char (point-min))
 552                           (forward-line 1)
 553                           (read (current-buffer)))
 554                       (end-of-file
 555                        (error "End of file in `%s'" file)))))))
 556         file
 557       0)))
 558
 559 \f
 560 ;;;###autoload
 561 (defun type-break ()
 562   "Take a typing break.
 563
 564 During the break, a demo selected from the functions listed in
 565 `type-break-demo-functions' is run.
 566
 567 After the typing break is finished, the next break is scheduled
 568 as per the function `type-break-schedule'."
 569   (interactive)
 570   (do-auto-save)
 571   (type-break-cancel-schedule)
 572   ;; remove any query scheduled during interactive invocation
 573   (remove-hook 'type-break-post-command-hook 'type-break-do-query)
 574   (let ((continue t)
 575         (start-time (current-time)))
 576     (setq type-break-time-last-break start-time)
 577     (while continue
 578       (save-window-excursion
 579         ;; Eat the screen.
 580         (and (eq (selected-window) (minibuffer-window))
 581              (other-window 1))
 582         (delete-other-windows)
 583         (scroll-right (window-width))
 584         (unless type-break-terse-messages
 585           (message "Press any key to resume from typing break."))
 586
 587         (random t)
 588         (let* ((len (length type-break-demo-functions))
 589                (idx (random len))
 590                (fn (nth idx type-break-demo-functions)))
 591           (condition-case ()
 592               (funcall fn)
 593             (error nil))))
 594
 595       (let ((good-interval (or type-break-good-rest-interval
 596                                type-break-good-break-interval)))
 597         (cond
 598          (good-interval
 599           (let ((break-secs (type-break-time-difference
 600                              start-time (current-time))))
 601             (cond
 602              ((>= break-secs good-interval)
 603               (setq continue nil))
 604              ;; 60 seconds may be too much leeway if the break is only 3
 605              ;; minutes to begin with.  You can just say "no" to the query
 606              ;; below if you're in that much of a hurry.
 607              ;;((> 60 (abs (- break-secs good-interval)))
 608              ;; (setq continue nil))
 609              ((funcall
 610                type-break-query-function
 611                (format
 612                 (if type-break-terse-messages
 613                     "%s%s remaining.  Continue break? "
 614                   "%sYou really ought to rest %s more.  Continue break? ")
 615                 (type-break-time-stamp)
 616                 (type-break-format-time (- good-interval
 617                                            break-secs)))))
 618              (t
 619               (setq continue nil)))))
 620          (t (setq continue nil))))))
 621
 622   (type-break-keystroke-reset)
 623   (type-break-file-time)
 624   (type-break-mode-line-countdown-or-break nil)
 625   (type-break-schedule))
 626
 627 \f
 628 (defun type-break-schedule (&optional time start interval)
 629   "Schedule a typing break for TIME seconds from now.
 630 If time is not specified it defaults to `type-break-interval'.
 631 START and INTERVAL are used when recovering a break.
 632 START is the start of the break (defaults to now).
 633 INTERVAL is the full length of an interval (defaults to TIME)."
 634   (interactive (list (and current-prefix-arg
 635                           (prefix-numeric-value current-prefix-arg))))
 636   (or time (setq time type-break-interval))
 637   (type-break-check-post-command-hook)
 638   (type-break-cancel-schedule)
 639   (type-break-time-warning-schedule time 'reset)
 640   (type-break-run-at-time (max 1 time) nil 'type-break-alarm)
 641   (setq type-break-time-next-break
 642         (type-break-time-sum (or start (current-time))
 643                              (or interval time))))
 644
 645 (defun type-break-cancel-schedule ()
 646   (type-break-cancel-time-warning-schedule)
 647   (type-break-cancel-function-timers 'type-break-alarm)
 648   (setq type-break-alarm-p nil)
 649   (setq type-break-time-next-break nil))
 650
 651 (defun type-break-time-warning-schedule (&optional time resetp)
 652   (let ((type-break-current-time-warning-interval nil))
 653     (type-break-cancel-time-warning-schedule))
 654   (add-hook 'type-break-post-command-hook 'type-break-time-warning 'append)
 655   (cond
 656    (type-break-time-warning-intervals
 657     (and resetp
 658          (setq type-break-current-time-warning-interval
 659                type-break-time-warning-intervals))
 660
 661     (or time
 662         (setq time (type-break-time-difference (current-time)
 663                                                type-break-time-next-break)))
 664
 665     (while (and type-break-current-time-warning-interval
 666                 (> (car type-break-current-time-warning-interval) time))
 667       (setq type-break-current-time-warning-interval
 668             (cdr type-break-current-time-warning-interval)))
 669
 670     (cond
 671      (type-break-current-time-warning-interval
 672       (setq time (- time (car type-break-current-time-warning-interval)))
 673       (setq type-break-current-time-warning-interval
 674             (cdr type-break-current-time-warning-interval))
 675
 676       ;(let (type-break-current-time-warning-interval)
 677       ;  (type-break-cancel-time-warning-schedule))
 678       (type-break-run-at-time (max 1 time) nil 'type-break-time-warning-alarm)
 679
 680       (cond
 681        (resetp
 682         (setq type-break-warning-countdown-string nil))
 683        (t
 684         (setq type-break-warning-countdown-string (number-to-string time))
 685         (setq type-break-warning-countdown-string-type "seconds"))))))))
 686
 687 (defun type-break-cancel-time-warning-schedule ()
 688   (type-break-cancel-function-timers 'type-break-time-warning-alarm)
 689   (remove-hook 'type-break-post-command-hook 'type-break-time-warning)
 690   (setq type-break-current-time-warning-interval
 691         type-break-time-warning-intervals)
 692   (setq type-break-time-warning-count 0) ; avoid warnings after break
 693   (setq type-break-warning-countdown-string nil))
 694
 695 (defun type-break-alarm ()
 696   (type-break-check-post-command-hook)
 697   (setq type-break-alarm-p t)
 698   (type-break-mode-line-countdown-or-break 'break))
 699
 700 (defun type-break-time-warning-alarm ()
 701   (type-break-check-post-command-hook)
 702   (type-break-time-warning-schedule)
 703   (setq type-break-time-warning-count type-break-warning-repeat)
 704   (type-break-time-warning)
 705   (type-break-mode-line-countdown-or-break 'countdown))
 706
 707 \f
 708 (defun type-break-run-tb-post-command-hook ()
 709   (and type-break-mode
 710        (run-hooks 'type-break-post-command-hook)))
 711
 712 (defun type-break-check ()
 713   "Ask to take a typing break if appropriate.
 714 This may be the case either because the scheduled time has come \(and the
 715 minimum keystroke threshold has been reached\) or because the maximum
 716 keystroke threshold has been exceeded."
 717   (type-break-file-keystroke-count)
 718   (let* ((min-threshold (car type-break-keystroke-threshold))
 719          (max-threshold (cdr type-break-keystroke-threshold)))
 720     (and type-break-good-rest-interval
 721          (progn
 722            (and (> (type-break-time-difference
 723                     type-break-time-last-command (current-time))
 724                    type-break-good-rest-interval)
 725                 (progn
 726                   (type-break-keystroke-reset)
 727                   (type-break-mode-line-countdown-or-break nil)
 728                   (setq type-break-time-last-break (current-time))
 729                   (type-break-schedule)))
 730            (setq type-break-time-last-command (current-time))))
 731
 732     (and type-break-keystroke-threshold
 733          (let ((keys (this-command-keys)))
 734            (cond
 735             ;; Ignore mouse motion
 736             ((and (vectorp keys)
 737                   (consp (aref keys 0))
 738                   (memq (car (aref keys 0)) '(mouse-movement))))
 739             (t
 740              (setq type-break-keystroke-count
 741                    (+ type-break-keystroke-count (length keys)))))))
 742
 743     (cond
 744      (type-break-alarm-p
 745       (cond
 746        ((input-pending-p))
 747        ((eq (selected-window) (minibuffer-window)))
 748        ((and min-threshold
 749              (< type-break-keystroke-count min-threshold))
 750         (type-break-schedule))
 751        (t
 752         ;; If keystroke count is within min-threshold of
 753         ;; max-threshold, lower it to reduce the likelihood of an
 754         ;; immediate subsequent query.
 755         (and max-threshold
 756              min-threshold
 757              (< (- max-threshold type-break-keystroke-count) min-threshold)
 758              (progn
 759                (type-break-keystroke-reset)
 760                (setq type-break-keystroke-count min-threshold)))
 761         (type-break-query))))
 762      ((and type-break-keystroke-warning-intervals
 763            max-threshold
 764            (= type-break-keystroke-warning-count 0)
 765            (type-break-check-keystroke-warning)))
 766      ((and max-threshold
 767            (> type-break-keystroke-count max-threshold)
 768            (not (input-pending-p))
 769            (not (eq (selected-window) (minibuffer-window))))
 770       (type-break-keystroke-reset)
 771       (setq type-break-keystroke-count (or min-threshold 0))
 772       (type-break-query)))))
 773
 774 ;; This should return t if warnings were enabled, nil otherwise.
 775 (defun type-break-check-keystroke-warning ()
 776   ;; This is safe because the caller should have checked that the cdr was
 777   ;; non-nil already.
 778   (let ((left (- (cdr type-break-keystroke-threshold)
 779                  type-break-keystroke-count)))
 780     (cond
 781      ((null (car type-break-current-keystroke-warning-interval))
 782       nil)
 783      ((> left (car type-break-current-keystroke-warning-interval))
 784       nil)
 785      (t
 786       (while (and (car type-break-current-keystroke-warning-interval)
 787                   (< left (car type-break-current-keystroke-warning-interval)))
 788         (setq type-break-current-keystroke-warning-interval
 789               (cdr type-break-current-keystroke-warning-interval)))
 790       (setq type-break-keystroke-warning-count type-break-warning-repeat)
 791       (add-hook 'type-break-post-command-hook 'type-break-keystroke-warning)
 792       (setq type-break-warning-countdown-string (number-to-string left))
 793       (setq type-break-warning-countdown-string-type "keystrokes")
 794       (type-break-mode-line-countdown-or-break 'countdown)
 795       t))))
 796
 797 ;; Arrange for a break query to be made, when the user stops typing furiously.
 798 (defun type-break-query ()
 799   (add-hook 'type-break-post-command-hook 'type-break-do-query))
 800
 801 (defun type-break-do-query ()
 802   (cond
 803    ((not type-break-query-mode)
 804     (type-break-noninteractive-query)
 805     (type-break-schedule type-break-query-interval)
 806     (remove-hook 'type-break-post-command-hook 'type-break-do-query))
 807    ((sit-for 2)
 808     (condition-case ()
 809         (cond
 810          ((let ((type-break-mode nil)
 811                 ;; yes-or-no-p sets this-command to exit-minibuffer,
 812                 ;; which hoses undo or yank-pop (if you happened to be
 813                 ;; yanking just when the query occurred).
 814                 (this-command this-command))
 815             ;; Cancel schedule to prevent possibility of a second query
 816             ;; from taking place before this one has even returned.
 817             ;; The condition-case wrapper will reschedule on quit.
 818             (type-break-cancel-schedule)
 819             ;; Also prevent a second query when the break is interrupted.
 820             (remove-hook 'type-break-post-command-hook 'type-break-do-query)
 821             (funcall type-break-query-function
 822                      (format "%s%s"
 823                              (type-break-time-stamp)
 824                              (if type-break-terse-messages
 825                                  "Break now? "
 826                                "Take a break from typing now? "))))
 827           (type-break))
 828          (t
 829           (type-break-schedule type-break-query-interval)))
 830       (quit
 831        (type-break-schedule type-break-query-interval))))))
 832
 833 (defun type-break-noninteractive-query (&optional _ignored-args)
 834   "Null query function which doesn't interrupt user and assumes `no'.
 835 It prints a reminder in the echo area to take a break, but doesn't enforce
 836 this or ask the user to start one right now."
 837   (cond
 838    (type-break-mode-line-message-mode)
 839    (t
 840     (beep t)
 841     (message "%sYou should take a typing break now.  Do `M-x type-break'."
 842              (type-break-time-stamp))
 843     (sit-for 1)
 844     (beep t)
 845     ;; return nil so query caller knows to reset reminder, as if user
 846     ;; said "no" in response to yes-or-no-p.
 847     nil)))
 848
 849 (defun type-break-time-warning ()
 850   (cond
 851    ((and (car type-break-keystroke-threshold)
 852          (< type-break-keystroke-count (car type-break-keystroke-threshold))))
 853    ((> type-break-time-warning-count 0)
 854     (let ((timeleft (type-break-time-difference (current-time)
 855                                                 type-break-time-next-break)))
 856       (setq type-break-warning-countdown-string (number-to-string timeleft))
 857       (cond
 858        ((eq (selected-window) (minibuffer-window)))
 859        ;; Do nothing if the command was just a prefix arg, since that will
 860        ;; immediately be followed by some other interactive command.
 861        ;; Otherwise, it is particularly annoying for the sit-for below to
 862        ;; delay redisplay when one types sequences like `C-u -1 C-l'.
 863        ((memq this-command '(digit-argument universal-argument)))
 864        ((not type-break-mode-line-message-mode)
 865         ;; Pause for a moment so any previous message can be seen.
 866         (sit-for 2)
 867         (message "%sWarning: typing break due in %s."
 868                  (type-break-time-stamp)
 869                  (type-break-format-time timeleft))
 870         (setq type-break-time-warning-count
 871               (1- type-break-time-warning-count))))))
 872    (t
 873     (remove-hook 'type-break-post-command-hook 'type-break-time-warning)
 874     (setq type-break-warning-countdown-string nil))))
 875
 876 (defun type-break-keystroke-warning ()
 877   (cond
 878    ((> type-break-keystroke-warning-count 0)
 879     (setq type-break-warning-countdown-string
 880           (number-to-string (- (cdr type-break-keystroke-threshold)
 881                                type-break-keystroke-count)))
 882     (cond
 883      ((eq (selected-window) (minibuffer-window)))
 884      ;; Do nothing if the command was just a prefix arg, since that will
 885      ;; immediately be followed by some other interactive command.
 886      ;; Otherwise, it is particularly annoying for the sit-for below to
 887      ;; delay redisplay when one types sequences like `C-u -1 C-l'.
 888      ((memq this-command '(digit-argument universal-argument)))
 889      ((not type-break-mode-line-message-mode)
 890       (sit-for 2)
 891       (message "%sWarning: typing break due in %s keystrokes."
 892                (type-break-time-stamp)
 893                (- (cdr type-break-keystroke-threshold)
 894                   type-break-keystroke-count))
 895       (setq type-break-keystroke-warning-count
 896             (1- type-break-keystroke-warning-count)))))
 897    (t
 898     (remove-hook 'type-break-post-command-hook
 899                  'type-break-keystroke-warning)
 900     (setq type-break-warning-countdown-string nil))))
 901
 902 (defun type-break-mode-line-countdown-or-break (&optional type)
 903   (cond
 904    ((not type-break-mode-line-message-mode))
 905    ((eq type 'countdown)
 906     ;(setq type-break-mode-line-break-message-p nil)
 907     (add-hook 'type-break-post-command-hook
 908               'type-break-force-mode-line-update 'append))
 909    ((eq type 'break)
 910     ;; Alternate
 911     (setq type-break-mode-line-break-message-p
 912           (not type-break-mode-line-break-message-p))
 913     (remove-hook 'type-break-post-command-hook
 914                  'type-break-force-mode-line-update))
 915    (t
 916     (setq type-break-mode-line-break-message-p nil)
 917     (setq type-break-warning-countdown-string nil)
 918     (remove-hook 'type-break-post-command-hook
 919                  'type-break-force-mode-line-update)))
 920   (type-break-force-mode-line-update))
 921
 922 \f
 923 ;;;###autoload
 924 (defun type-break-statistics ()
 925   "Print statistics about typing breaks in a temporary buffer.
 926 This includes the last time a typing break was taken, when the next one is
 927 scheduled, the keystroke thresholds and the current keystroke count, etc."
 928   (interactive)
 929   (with-output-to-temp-buffer "*Typing Break Statistics*"
 930     (princ (format "Typing break statistics\n-----------------------\n
 931 Typing break mode is currently %s.
 932 Interactive query for breaks is %s.
 933 Warnings of imminent typing breaks in mode line is %s.
 934
 935 Last typing break ended     : %s
 936 Next scheduled typing break : %s\n
 937 Minimum keystroke threshold : %s
 938 Maximum keystroke threshold : %s
 939 Current keystroke count     : %s"
 940                    (if type-break-mode "enabled" "disabled")
 941                    (if type-break-query-mode "enabled" "disabled")
 942                    (if type-break-mode-line-message-mode "enabled" "disabled")
 943                    (if type-break-time-last-break
 944                        (current-time-string type-break-time-last-break)
 945                      "never")
 946                    (if (and type-break-mode type-break-time-next-break)
 947                        (format "%s\t(%s from now)"
 948                                (current-time-string type-break-time-next-break)
 949                                (type-break-format-time
 950                                 (type-break-time-difference
 951                                 (current-time)
 952                                 type-break-time-next-break)))
 953                      "none scheduled")
 954                    (or (car type-break-keystroke-threshold) "none")
 955                    (or (cdr type-break-keystroke-threshold) "none")
 956                    type-break-keystroke-count))))
 957
 958 ;;;###autoload
 959 (defun type-break-guesstimate-keystroke-threshold (wpm &optional wordlen frac)
 960   "Guess values for the minimum/maximum keystroke threshold for typing breaks.
 961
 962 If called interactively, the user is prompted for their guess as to how
 963 many words per minute they usually type.  This value should not be your
 964 maximum WPM, but your average.  Of course, this is harder to gauge since it
 965 can vary considerably depending on what you are doing.  For example, one
 966 tends to type less when debugging a program as opposed to writing
 967 documentation.  (Perhaps a separate program should be written to estimate
 968 average typing speed.)
 969
 970 From that, this command sets the values in `type-break-keystroke-threshold'
 971 based on a fairly simple algorithm involving assumptions about the average
 972 length of words (5).  For the minimum threshold, it uses about a fifth of
 973 the computed maximum threshold.
 974
 975 When called from Lisp programs, the optional args WORDLEN and FRAC can be
 976 used to override the default assumption about average word length and the
 977 fraction of the maximum threshold to which to set the minimum threshold.
 978 FRAC should be the inverse of the fractional value; for example, a value of
 979 2 would mean to use one half, a value of 4 would mean to use one quarter, etc."
 980   (interactive "NOn average, how many words per minute do you type? ")
 981   (let* ((upper (* wpm (or wordlen 5) (/ type-break-interval 60)))
 982          (lower (/ upper (or frac 5))))
 983     (or type-break-keystroke-threshold
 984         (setq type-break-keystroke-threshold (cons nil nil)))
 985     (setcar type-break-keystroke-threshold lower)
 986     (setcdr type-break-keystroke-threshold upper)
 987     (if (called-interactively-p 'interactive)
 988         (message "min threshold: %d\tmax threshold: %d" lower upper))
 989     type-break-keystroke-threshold))
 990
 991 \f
 992 ;;; misc functions
 993
 994 ;; Compute the difference, in seconds, between a and b, two structures
 995 ;; similar to those returned by `current-time'.
 996 ;; Use addition rather than logand since that is more robust; the low 16
 997 ;; bits of the seconds might have been incremented, making it more than 16
 998 ;; bits wide.
 999 (defun type-break-time-difference (a b)
1000   (+ (lsh (- (car b) (car a)) 16)
1001      (- (car (cdr b)) (car (cdr a)))))
1002
1003 ;; Return (in a new list the same in structure to that returned by
1004 ;; `current-time') the sum of the arguments.  Each argument may be a time
1005 ;; list or a single integer, a number of seconds.
1006 ;; This function keeps the high and low 16 bits of the seconds properly
1007 ;; balanced so that the lower value never exceeds 16 bits.  Otherwise, when
1008 ;; the result is passed to `current-time-string' it will toss some of the
1009 ;; "low" bits and format the time incorrectly.
1010 (defun type-break-time-sum (&rest tmlist)
1011   (let ((high 0)
1012         (low 0)
1013         (micro 0)
1014         tem)
1015     (while tmlist
1016       (setq tem (car tmlist))
1017       (setq tmlist (cdr tmlist))
1018       (cond
1019        ((numberp tem)
1020         (setq low (+ low tem)))
1021        (t
1022         (setq high  (+ high  (or (car tem) 0)))
1023         (setq low   (+ low   (or (car (cdr tem)) 0)))
1024         (setq micro (+ micro (or (car (cdr (cdr tem))) 0))))))
1025
1026     (and (>= micro 1000000)
1027          (progn
1028            (setq tem (/ micro 1000000))
1029            (setq low (+ low tem))
1030            (setq micro (- micro (* tem 1000000)))))
1031
1032     (setq tem (lsh low -16))
1033     (and (> tem 0)
1034          (progn
1035            (setq low (logand low 65535))
1036            (setq high (+ high tem))))
1037
1038     (list high low micro)))
1039
1040 (defun type-break-time-stamp (&optional when)
1041   (if (fboundp 'format-time-string)
1042       (format-time-string type-break-time-stamp-format when)
1043     ;; Emacs 19.28 and prior do not have format-time-string.
1044     ;; In that case, result is not customizable.  Upgrade today!
1045     (format "[%s] " (substring (current-time-string when) 11 16))))
1046
1047 (defun type-break-format-time (secs)
1048   (let ((mins (/ secs 60)))
1049     (cond
1050      ((= mins 1) (format "%d minute" mins))
1051      ((> mins 0) (format "%d minutes" mins))
1052      ((= secs 1) (format "%d second" secs))
1053      (t (format "%d seconds" secs)))))
1054
1055 (defun type-break-keystroke-reset ()
1056   (setq type-break-interval-start (current-time)) ; not a keystroke
1057   (setq type-break-keystroke-count 0)
1058   (setq type-break-keystroke-warning-count 0)
1059   (setq type-break-current-keystroke-warning-interval
1060         type-break-keystroke-warning-intervals)
1061   (remove-hook 'type-break-post-command-hook 'type-break-keystroke-warning))
1062
1063 (defun type-break-force-mode-line-update (&optional all)
1064   "Force the mode-line of the current buffer to be redisplayed.
1065 With optional non-nil ALL, force redisplay of all mode-lines."
1066   (and all (with-current-buffer (other-buffer)))
1067   (set-buffer-modified-p (buffer-modified-p)))
1068
1069 ;; If an exception occurs in Emacs while running the post command hook, the
1070 ;; value of that hook is clobbered.  This is because the value of the
1071 ;; variable is temporarily set to nil while it's running to prevent
1072 ;; recursive application, but it also means an exception aborts the routine
1073 ;; of restoring it.  This function is called from the timers to restore it,
1074 ;; just in case.
1075 (defun type-break-check-post-command-hook ()
1076   (add-hook 'post-command-hook 'type-break-run-tb-post-command-hook 'append))
1077
1078 \f
1079 ;;; Timer wrapper functions
1080 ;;
1081 ;; These shield type-break from variations in the interval timer packages
1082 ;; for different versions of Emacs.
1083
1084 (defun type-break-run-at-time (time repeat function)
1085   (condition-case nil (or (require 'timer) (require 'itimer)) (error nil))
1086   (run-at-time time repeat function))
1087
1088 (defvar timer-dont-exit)
1089 (defun type-break-cancel-function-timers (function)
1090   (let ((timer-dont-exit t))
1091     (cancel-function-timers function)))
1092
1093 \f
1094 ;;; Demo wrappers
1095
1096 (defun type-break-catch-up-event ()
1097   ;; If the last input event is a down-event, read and discard the
1098   ;; corresponding up-event too, to avoid triggering another prompt.
1099   (and (eventp last-input-event)
1100        (memq 'down (event-modifiers last-input-event))
1101        (read-event)))
1102
1103 ;; This is a wrapper around hanoi that calls it with an arg large enough to
1104 ;; make the largest discs possible that will fit in the window.
1105 ;; Also, clean up the *Hanoi* buffer after we're done.
1106 (defun type-break-demo-hanoi ()
1107   "Take a hanoiing typing break."
1108   (and (get-buffer "*Hanoi*")
1109        (kill-buffer "*Hanoi*"))
1110   (condition-case ()
1111       (progn
1112         (hanoi (/ (window-width) 8))
1113         ;; Wait for user to come back.
1114         (read-event)
1115         (type-break-catch-up-event)
1116         (kill-buffer "*Hanoi*"))
1117     (quit
1118      (read-event)
1119      (type-break-catch-up-event)
1120      (and (get-buffer "*Hanoi*")
1121           (kill-buffer "*Hanoi*")))))
1122
1123 ;; This is a wrapper around life that calls it with a `sleep' arg to make
1124 ;; it run a little more leisurely.
1125 ;; Also, clean up the *Life* buffer after we're done.
1126 (defun type-break-demo-life ()
1127   "Take a typing break and get a life."
1128   (let ((continue t))
1129     (while continue
1130       (setq continue nil)
1131       (and (get-buffer "*Life*")
1132            (kill-buffer "*Life*"))
1133       (condition-case ()
1134           (progn
1135             (life 3)
1136             ;; wait for user to return
1137             (read-event)
1138             (type-break-catch-up-event)
1139             (kill-buffer "*Life*"))
1140         (life-extinct
1141          (message "%s" (get 'life-extinct 'error-message))
1142          ;; restart demo
1143          (setq continue t))
1144         (quit
1145          (type-break-catch-up-event)
1146          (and (get-buffer "*Life*")
1147               (kill-buffer "*Life*")))))))
1148
1149 ;; Boring demo, but doesn't use many cycles
1150 (defun type-break-demo-boring ()
1151   "Boring typing break demo."
1152   (let ((rmsg (if type-break-terse-messages
1153                   ""
1154                 "Press any key to resume from typing break"))
1155         (buffer-name "*Typing Break Buffer*")
1156         lines elapsed timeleft tmsg)
1157     (condition-case ()
1158         (progn
1159           (switch-to-buffer (get-buffer-create buffer-name))
1160           (buffer-disable-undo (current-buffer))
1161           (setq lines (/ (window-body-height) 2))
1162           (unless type-break-terse-messages (setq lines (1- lines)))
1163           (if type-break-demo-boring-stats
1164               (setq lines (- lines 2)))
1165           (setq lines (make-string lines ?\C-j))
1166           (while (not (input-pending-p))
1167             (erase-buffer)
1168             (setq elapsed (type-break-time-difference
1169                            type-break-time-last-break
1170                            (current-time)))
1171             (let ((good-interval (or type-break-good-rest-interval
1172                                      type-break-good-break-interval)))
1173               (cond
1174                (good-interval
1175                 (setq timeleft (- good-interval elapsed))
1176                 (if (> timeleft 0)
1177                     (setq tmsg
1178                           (format (if type-break-terse-messages
1179                                       "Break remaining: %s"
1180                                     "You should rest for %s more")
1181                                   (type-break-format-time timeleft)))
1182                   (setq tmsg
1183                         (format (if type-break-terse-messages
1184                                     "Break complete (%s elapsed in total)"
1185                                   "Typing break has lasted %s")
1186                                 (type-break-format-time elapsed)))))
1187                (t
1188                 (setq tmsg
1189                       (format (if type-break-terse-messages
1190                                   "Break has lasted %s"
1191                                 "Typing break has lasted %s")
1192                               (type-break-format-time elapsed))))))
1193             (insert lines
1194                     (make-string (/ (- (window-width) (length tmsg)) 2) ?\ )
1195                     tmsg)
1196             (if (> (length rmsg) 0)
1197                 (insert "\n"
1198                         (make-string (/ (- (window-width) (length rmsg)) 2)
1199                                      ?\ )
1200                         rmsg))
1201             (if type-break-demo-boring-stats
1202                 (let*
1203                     ((message
1204                       (format
1205                        (if type-break-terse-messages
1206                            "Since last break: %s keystrokes\n"
1207                          "Since your last break you've typed %s keystrokes\n")
1208                        type-break-keystroke-count))
1209                      (column-spaces
1210                       (make-string (/ (- (window-width) (length message)) 2)
1211                                    ?\ ))
1212                      (wpm (/ (/ (float type-break-keystroke-count) 5)
1213                              (/ (type-break-time-difference
1214                                  type-break-interval-start
1215                                  type-break-time-last-break)
1216                                 60.0))))
1217                   (insert "\n\n" column-spaces message)
1218                   (if type-break-terse-messages
1219                       (insert (format "                  %s%.2f wpm"
1220                                       column-spaces
1221                                       wpm))
1222                     (setq message
1223                           (format "at an average of %.2f words per minute"
1224                                   wpm))
1225                     (insert
1226                      (make-string (/ (- (window-width) (length message)) 2)
1227                                   ?\ )
1228                      message))))
1229             (goto-char (point-min))
1230             (sit-for 60))
1231           (read-event)
1232           (type-break-catch-up-event)
1233           (kill-buffer buffer-name))
1234       (quit
1235        (and (get-buffer buffer-name)
1236             (kill-buffer buffer-name))))))
1237
1238 \f
1239 (provide 'type-break)
1240
1241 (if type-break-mode
1242     (type-break-mode 1))
1243
1244 ;;; type-break.el ends here