Fix MS-Windows build.
[emacs.git] / lisp / battery.el
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1 ;;; battery.el --- display battery status information -*- coding: utf-8 -*-
3 ;; Copyright (C) 1997-1998, 2000-2013 Free Software Foundation, Inc.
5 ;; Author: Ralph Schleicher <rs@nunatak.allgaeu.org>
6 ;; Keywords: hardware
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
23 ;;; Commentary:
25 ;; There is at present support for GNU/Linux, OS X and Windows. This
26 ;; library supports both the `/proc/apm' file format of Linux version
27 ;; 1.3.58 or newer and the `/proc/acpi/' directory structure of Linux
28 ;; 2.4.20 and 2.6. Darwin (OS X) is supported by using the `pmset'
29 ;; program. Windows is supported by the GetSystemPowerStatus API call.
31 ;;; Code:
33 (require 'timer)
34 (eval-when-compile (require 'cl-lib))
36 (defgroup battery nil
37 "Display battery status information."
38 :prefix "battery-"
39 :group 'hardware)
41 ;; Either BATn or yeeloong-bat, basically.
42 (defconst battery--linux-sysfs-regexp "[bB][aA][tT][0-9]?$")
44 (defcustom battery-status-function
45 (cond ((and (eq system-type 'gnu/linux)
46 (file-readable-p "/proc/apm"))
47 'battery-linux-proc-apm)
48 ((and (eq system-type 'gnu/linux)
49 (file-directory-p "/proc/acpi/battery"))
50 'battery-linux-proc-acpi)
51 ((and (eq system-type 'gnu/linux)
52 (file-directory-p "/sys/class/power_supply/")
53 (directory-files "/sys/class/power_supply/" nil
54 battery--linux-sysfs-regexp))
55 'battery-linux-sysfs)
56 ((and (eq system-type 'berkeley-unix)
57 (file-executable-p "/usr/sbin/apm"))
58 'battery-bsd-apm)
59 ((and (eq system-type 'darwin)
60 (condition-case nil
61 (with-temp-buffer
62 (and (eq (call-process "pmset" nil t nil "-g" "ps") 0)
63 (> (buffer-size) 0)))
64 (error nil)))
65 'battery-pmset)
66 ((fboundp 'w32-battery-status)
67 'w32-battery-status))
68 "Function for getting battery status information.
69 The function has to return an alist of conversion definitions.
70 Its cons cells are of the form
72 (CONVERSION . REPLACEMENT-TEXT)
74 CONVERSION is the character code of a \"conversion specification\"
75 introduced by a `%' character in a control string."
76 :type '(choice (const nil) function)
77 :group 'battery)
79 (defcustom battery-echo-area-format
80 (cond ((eq battery-status-function 'battery-linux-proc-acpi)
81 "Power %L, battery %B at %r (%p%% load, remaining time %t)")
82 ((eq battery-status-function 'battery-linux-sysfs)
83 "Power %L, battery %B (%p%% load, remaining time %t)")
84 ((eq battery-status-function 'battery-pmset)
85 "%L power, battery %B (%p%% load, remaining time %t)")
86 (battery-status-function
87 "Power %L, battery %B (%p%% load, remaining time %t)"))
88 "Control string formatting the string to display in the echo area.
89 Ordinary characters in the control string are printed as-is, while
90 conversion specifications introduced by a `%' character in the control
91 string are substituted as defined by the current value of the variable
92 `battery-status-function'. Here are the ones generally available:
93 %c Current capacity (mAh or mWh)
94 %r Current rate of charge or discharge
95 %B Battery status (verbose)
96 %b Battery status: empty means high, `-' means low,
97 `!' means critical, and `+' means charging
98 %d Temperature (in degrees Celsius)
99 %L AC line status (verbose)
100 %p Battery load percentage
101 %m Remaining time (to charge or discharge) in minutes
102 %h Remaining time (to charge or discharge) in hours
103 %t Remaining time (to charge or discharge) in the form `h:min'"
104 :type '(choice string (const nil))
105 :group 'battery)
107 (defvar battery-mode-line-string nil
108 "String to display in the mode line.")
109 ;;;###autoload (put 'battery-mode-line-string 'risky-local-variable t)
111 (defcustom battery-mode-line-limit 100
112 "Percentage of full battery load below which display battery status"
113 :version "24.1"
114 :type 'integer
115 :group 'battery)
117 (defcustom battery-mode-line-format
118 (cond ((eq battery-status-function 'battery-linux-proc-acpi)
119 "[%b%p%%,%d°C]")
120 (battery-status-function
121 "[%b%p%%]"))
122 "Control string formatting the string to display in the mode line.
123 Ordinary characters in the control string are printed as-is, while
124 conversion specifications introduced by a `%' character in the control
125 string are substituted as defined by the current value of the variable
126 `battery-status-function'. Here are the ones generally available:
127 %c Current capacity (mAh or mWh)
128 %r Current rate of charge or discharge
129 %B Battery status (verbose)
130 %b Battery status: empty means high, `-' means low,
131 `!' means critical, and `+' means charging
132 %d Temperature (in degrees Celsius)
133 %L AC line status (verbose)
134 %p Battery load percentage
135 %m Remaining time (to charge or discharge) in minutes
136 %h Remaining time (to charge or discharge) in hours
137 %t Remaining time (to charge or discharge) in the form `h:min'"
138 :type '(choice string (const nil))
139 :group 'battery)
141 (defcustom battery-update-interval 60
142 "Seconds after which the battery status will be updated."
143 :type 'integer
144 :group 'battery)
146 (defcustom battery-load-low 25
147 "Upper bound of low battery load percentage.
148 A battery load percentage below this number is considered low."
149 :type 'integer
150 :group 'battery)
152 (defcustom battery-load-critical 10
153 "Upper bound of critical battery load percentage.
154 A battery load percentage below this number is considered critical."
155 :type 'integer
156 :group 'battery)
158 (defvar battery-update-timer nil
159 "Interval timer object.")
161 ;;;###autoload
162 (defun battery ()
163 "Display battery status information in the echo area.
164 The text being displayed in the echo area is controlled by the variables
165 `battery-echo-area-format' and `battery-status-function'."
166 (interactive)
167 (message "%s" (if (and battery-echo-area-format battery-status-function)
168 (battery-format battery-echo-area-format
169 (funcall battery-status-function))
170 "Battery status not available")))
172 ;;;###autoload
173 (define-minor-mode display-battery-mode
174 "Toggle battery status display in mode line (Display Battery mode).
175 With a prefix argument ARG, enable Display Battery mode if ARG is
176 positive, and disable it otherwise. If called from Lisp, enable
177 the mode if ARG is omitted or nil.
179 The text displayed in the mode line is controlled by
180 `battery-mode-line-format' and `battery-status-function'.
181 The mode line is be updated every `battery-update-interval'
182 seconds."
183 :global t :group 'battery
184 (setq battery-mode-line-string "")
185 (or global-mode-string (setq global-mode-string '("")))
186 (and battery-update-timer (cancel-timer battery-update-timer))
187 (if (and battery-status-function battery-mode-line-format)
188 (if (not display-battery-mode)
189 (setq global-mode-string
190 (delq 'battery-mode-line-string global-mode-string))
191 (add-to-list 'global-mode-string 'battery-mode-line-string t)
192 (setq battery-update-timer (run-at-time nil battery-update-interval
193 'battery-update-handler))
194 (battery-update))
195 (message "Battery status not available")
196 (setq display-battery-mode nil)))
198 (defun battery-update-handler ()
199 (battery-update)
200 (sit-for 0))
202 (defun battery-update ()
203 "Update battery status information in the mode line."
204 (let ((data (and battery-status-function (funcall battery-status-function))))
205 (setq battery-mode-line-string
206 (propertize (if (and battery-mode-line-format
207 (<= (car (read-from-string (cdr (assq ?p data))))
208 battery-mode-line-limit))
209 (battery-format
210 battery-mode-line-format
211 data)
213 'face
214 (and (<= (car (read-from-string (cdr (assq ?p data))))
215 battery-load-critical)
216 'error)
217 'help-echo "Battery status information")))
218 (force-mode-line-update))
220 ;;; `/proc/apm' interface for Linux.
222 (defconst battery-linux-proc-apm-regexp
223 (concat "^\\([^ ]+\\)" ; Driver version.
224 " \\([^ ]+\\)" ; APM BIOS version.
225 " 0x\\([0-9a-f]+\\)" ; APM BIOS flags.
226 " 0x\\([0-9a-f]+\\)" ; AC line status.
227 " 0x\\([0-9a-f]+\\)" ; Battery status.
228 " 0x\\([0-9a-f]+\\)" ; Battery flags.
229 " \\(-?[0-9]+\\)%" ; Load percentage.
230 " \\(-?[0-9]+\\)" ; Remaining time.
231 " \\(.*\\)" ; Time unit.
232 "$")
233 "Regular expression matching contents of `/proc/apm'.")
235 (defun battery-linux-proc-apm ()
236 "Get APM status information from Linux (the kernel).
237 This function works only with the new `/proc/apm' format introduced
238 in Linux version 1.3.58.
240 The following %-sequences are provided:
241 %v Linux driver version
242 %V APM BIOS version
243 %I APM BIOS status (verbose)
244 %L AC line status (verbose)
245 %B Battery status (verbose)
246 %b Battery status, empty means high, `-' means low,
247 `!' means critical, and `+' means charging
248 %p Battery load percentage
249 %s Remaining time (to charge or discharge) in seconds
250 %m Remaining time (to charge or discharge) in minutes
251 %h Remaining time (to charge or discharge) in hours
252 %t Remaining time (to charge or discharge) in the form `h:min'"
253 (let (driver-version bios-version bios-interface line-status
254 battery-status battery-status-symbol load-percentage
255 seconds minutes hours remaining-time tem)
256 (with-temp-buffer
257 (ignore-errors (insert-file-contents "/proc/apm"))
258 (when (re-search-forward battery-linux-proc-apm-regexp)
259 (setq driver-version (match-string 1))
260 (setq bios-version (match-string 2))
261 (setq tem (string-to-number (match-string 3) 16))
262 (if (not (logand tem 2))
263 (setq bios-interface "not supported")
264 (setq bios-interface "enabled")
265 (cond ((logand tem 16) (setq bios-interface "disabled"))
266 ((logand tem 32) (setq bios-interface "disengaged")))
267 (setq tem (string-to-number (match-string 4) 16))
268 (cond ((= tem 0) (setq line-status "off-line"))
269 ((= tem 1) (setq line-status "on-line"))
270 ((= tem 2) (setq line-status "on backup")))
271 (setq tem (string-to-number (match-string 6) 16))
272 (if (= tem 255)
273 (setq battery-status "N/A")
274 (setq tem (string-to-number (match-string 5) 16))
275 (cond ((= tem 0) (setq battery-status "high"
276 battery-status-symbol ""))
277 ((= tem 1) (setq battery-status "low"
278 battery-status-symbol "-"))
279 ((= tem 2) (setq battery-status "critical"
280 battery-status-symbol "!"))
281 ((= tem 3) (setq battery-status "charging"
282 battery-status-symbol "+")))
283 (setq load-percentage (match-string 7))
284 (setq seconds (string-to-number (match-string 8)))
285 (and (string-equal (match-string 9) "min")
286 (setq seconds (* 60 seconds)))
287 (setq minutes (/ seconds 60)
288 hours (/ seconds 3600))
289 (setq remaining-time
290 (format "%d:%02d" hours (- minutes (* 60 hours))))))))
291 (list (cons ?v (or driver-version "N/A"))
292 (cons ?V (or bios-version "N/A"))
293 (cons ?I (or bios-interface "N/A"))
294 (cons ?L (or line-status "N/A"))
295 (cons ?B (or battery-status "N/A"))
296 (cons ?b (or battery-status-symbol ""))
297 (cons ?p (or load-percentage "N/A"))
298 (cons ?s (or (and seconds (number-to-string seconds)) "N/A"))
299 (cons ?m (or (and minutes (number-to-string minutes)) "N/A"))
300 (cons ?h (or (and hours (number-to-string hours)) "N/A"))
301 (cons ?t (or remaining-time "N/A")))))
304 ;;; `/proc/acpi/' interface for Linux.
306 (defun battery-linux-proc-acpi ()
307 "Get ACPI status information from Linux (the kernel).
308 This function works only with the `/proc/acpi/' format introduced
309 in Linux version 2.4.20 and 2.6.0.
311 The following %-sequences are provided:
312 %c Current capacity (mAh)
313 %r Current rate
314 %B Battery status (verbose)
315 %b Battery status, empty means high, `-' means low,
316 `!' means critical, and `+' means charging
317 %d Temperature (in degrees Celsius)
318 %L AC line status (verbose)
319 %p Battery load percentage
320 %m Remaining time (to charge or discharge) in minutes
321 %h Remaining time (to charge or discharge) in hours
322 %t Remaining time (to charge or discharge) in the form `h:min'"
323 (let ((design-capacity 0)
324 (last-full-capacity 0)
325 full-capacity
326 (warn 0)
327 (low 0)
328 capacity rate rate-type charging-state minutes hours)
329 ;; ACPI provides information about each battery present in the system in
330 ;; a separate subdirectory. We are going to merge the available
331 ;; information together since displaying for a variable amount of
332 ;; batteries seems overkill for format-strings.
333 (with-temp-buffer
334 (dolist (dir (ignore-errors (directory-files "/proc/acpi/battery/"
335 t "\\`[^.]")))
336 (erase-buffer)
337 (ignore-errors (insert-file-contents (expand-file-name "state" dir)))
338 (when (re-search-forward "present: +yes$" nil t)
339 (and (re-search-forward "charging state: +\\(.*\\)$" nil t)
340 (member charging-state '("unknown" "charged" nil))
341 ;; On most multi-battery systems, most of the time only one
342 ;; battery is "charging"/"discharging", the others are
343 ;; "unknown".
344 (setq charging-state (match-string 1)))
345 (when (re-search-forward "present rate: +\\([0-9]+\\) \\(m[AW]\\)$"
346 nil t)
347 (setq rate (+ (or rate 0) (string-to-number (match-string 1))))
348 (when (> rate 0)
349 (setq rate-type (or (and rate-type
350 (if (string= rate-type (match-string 2))
351 rate-type
352 (error
353 "Inconsistent rate types (%s vs. %s)"
354 rate-type (match-string 2))))
355 (match-string 2)))))
356 (when (re-search-forward "remaining capacity: +\\([0-9]+\\) m[AW]h$"
357 nil t)
358 (setq capacity
359 (+ (or capacity 0) (string-to-number (match-string 1))))))
360 (goto-char (point-max))
361 (ignore-errors (insert-file-contents (expand-file-name "info" dir)))
362 (when (re-search-forward "present: +yes$" nil t)
363 (when (re-search-forward "design capacity: +\\([0-9]+\\) m[AW]h$"
364 nil t)
365 (cl-incf design-capacity (string-to-number (match-string 1))))
366 (when (re-search-forward "last full capacity: +\\([0-9]+\\) m[AW]h$"
367 nil t)
368 (cl-incf last-full-capacity (string-to-number (match-string 1))))
369 (when (re-search-forward
370 "design capacity warning: +\\([0-9]+\\) m[AW]h$" nil t)
371 (cl-incf warn (string-to-number (match-string 1))))
372 (when (re-search-forward "design capacity low: +\\([0-9]+\\) m[AW]h$"
373 nil t)
374 (cl-incf low (string-to-number (match-string 1)))))))
375 (setq full-capacity (if (> last-full-capacity 0)
376 last-full-capacity design-capacity))
377 (and capacity rate
378 (setq minutes (if (zerop rate) 0
379 (floor (* (/ (float (if (string= charging-state
380 "charging")
381 (- full-capacity capacity)
382 capacity))
383 rate)
384 60)))
385 hours (/ minutes 60)))
386 (list (cons ?c (or (and capacity (number-to-string capacity)) "N/A"))
387 (cons ?L (or (battery-search-for-one-match-in-files
388 (mapcar (lambda (e) (concat e "/state"))
389 (ignore-errors
390 (directory-files "/proc/acpi/ac_adapter/"
391 t "\\`[^.]")))
392 "state: +\\(.*\\)$" 1)
394 "N/A"))
395 (cons ?d (or (battery-search-for-one-match-in-files
396 (mapcar (lambda (e) (concat e "/temperature"))
397 (ignore-errors
398 (directory-files "/proc/acpi/thermal_zone/"
399 t "\\`[^.]")))
400 "temperature: +\\([0-9]+\\) C$" 1)
402 "N/A"))
403 (cons ?r (or (and rate (concat (number-to-string rate) " "
404 rate-type)) "N/A"))
405 (cons ?B (or charging-state "N/A"))
406 (cons ?b (or (and (string= charging-state "charging") "+")
407 (and capacity (< capacity low) "!")
408 (and capacity (< capacity warn) "-")
409 ""))
410 (cons ?h (or (and hours (number-to-string hours)) "N/A"))
411 (cons ?m (or (and minutes (number-to-string minutes)) "N/A"))
412 (cons ?t (or (and minutes
413 (format "%d:%02d" hours (- minutes (* 60 hours))))
414 "N/A"))
415 (cons ?p (or (and full-capacity capacity
416 (> full-capacity 0)
417 (number-to-string
418 (floor (/ capacity
419 (/ (float full-capacity) 100)))))
420 "N/A")))))
423 ;;; `/sys/class/power_supply/BATN' interface for Linux.
425 (defun battery-linux-sysfs ()
426 "Get ACPI status information from Linux kernel.
427 This function works only with the new `/sys/class/power_supply/'
428 format introduced in Linux version 2.4.25.
430 The following %-sequences are provided:
431 %c Current capacity (mAh or mWh)
432 %r Current rate
433 %B Battery status (verbose)
434 %d Temperature (in degrees Celsius)
435 %p Battery load percentage
436 %L AC line status (verbose)
437 %m Remaining time (to charge or discharge) in minutes
438 %h Remaining time (to charge or discharge) in hours
439 %t Remaining time (to charge or discharge) in the form `h:min'"
440 (let (charging-state rate temperature hours
441 (charge-full 0.0)
442 (charge-now 0.0)
443 (energy-full 0.0)
444 (energy-now 0.0))
445 ;; SysFS provides information about each battery present in the
446 ;; system in a separate subdirectory. We are going to merge the
447 ;; available information together.
448 (with-temp-buffer
449 (dolist (dir (ignore-errors
450 (directory-files
451 "/sys/class/power_supply/" t
452 battery--linux-sysfs-regexp)))
453 (erase-buffer)
454 (ignore-errors (insert-file-contents
455 (expand-file-name "uevent" dir)))
456 (when (re-search-forward "POWER_SUPPLY_PRESENT=1$" nil t)
457 (goto-char (point-min))
458 (and (re-search-forward "POWER_SUPPLY_STATUS=\\(.*\\)$" nil t)
459 (member charging-state '("Unknown" "Full" nil))
460 (setq charging-state (match-string 1)))
461 (when (re-search-forward
462 "POWER_SUPPLY_\\(CURRENT\\|POWER\\)_NOW=\\([0-9]*\\)$"
463 nil t)
464 (setq rate (float (string-to-number (match-string 2)))))
465 (when (re-search-forward "POWER_SUPPLY_TEMP=\\([0-9]*\\)$" nil t)
466 (setq temperature (match-string 1)))
467 (let (full-string now-string)
468 ;; Sysfs may list either charge (mAh) or energy (mWh).
469 ;; Keep track of both, and choose which to report later.
470 (cond ((and (re-search-forward
471 "POWER_SUPPLY_CHARGE_FULL=\\([0-9]*\\)$" nil t)
472 (setq full-string (match-string 1))
473 (re-search-forward
474 "POWER_SUPPLY_CHARGE_NOW=\\([0-9]*\\)$" nil t)
475 (setq now-string (match-string 1)))
476 (setq charge-full (+ charge-full
477 (string-to-number full-string))
478 charge-now (+ charge-now
479 (string-to-number now-string))))
480 ((and (re-search-forward
481 "POWER_SUPPLY_ENERGY_FULL=\\([0-9]*\\)$" nil t)
482 (setq full-string (match-string 1))
483 (re-search-forward
484 "POWER_SUPPLY_ENERGY_NOW=\\([0-9]*\\)$" nil t)
485 (setq now-string (match-string 1)))
486 (setq energy-full (+ energy-full
487 (string-to-number full-string))
488 energy-now (+ energy-now
489 (string-to-number now-string))))))
490 (goto-char (point-min))
491 (when (and energy-now rate (not (zerop rate))
492 (re-search-forward
493 "POWER_SUPPLY_VOLTAGE_NOW=\\([0-9]*\\)$" nil t))
494 (let ((remaining (if (string= charging-state "Discharging")
495 energy-now
496 (- energy-full energy-now))))
497 (setq hours (/ (/ (* remaining (string-to-number
498 (match-string 1)))
499 rate)
500 10000000.0)))))))
501 (list (cons ?c (cond ((or (> charge-full 0) (> charge-now 0))
502 (number-to-string charge-now))
503 ((or (> energy-full 0) (> energy-now 0))
504 (number-to-string energy-now))
505 (t "N/A")))
506 (cons ?r (if rate (format "%.1f" (/ rate 1000000.0)) "N/A"))
507 (cons ?m (if hours (format "%d" (* hours 60)) "N/A"))
508 (cons ?h (if hours (format "%d" hours) "N/A"))
509 (cons ?t (if hours
510 (format "%d:%02d" hours (* (- hours (floor hours)) 60))
511 "N/A"))
512 (cons ?d (or temperature "N/A"))
513 (cons ?B (or charging-state "N/A"))
514 (cons ?p (cond ((and (> charge-full 0) (> charge-now 0))
515 (format "%.1f"
516 (/ (* 100 charge-now) charge-full)))
517 ((> energy-full 0)
518 (format "%.1f"
519 (/ (* 100 energy-now) energy-full)))
520 (t "N/A")))
521 (cons ?L (if (file-readable-p "/sys/class/power_supply/AC/online")
522 (if (battery-search-for-one-match-in-files
523 (list "/sys/class/power_supply/AC/online"
524 "/sys/class/power_supply/ACAD/online")
525 "1" 0)
526 "AC"
527 "BAT")
528 "N/A")))))
531 ;;; `apm' interface for BSD.
532 (defun battery-bsd-apm ()
533 "Get APM status information from BSD apm binary.
534 The following %-sequences are provided:
535 %L AC line status (verbose)
536 %B Battery status (verbose)
537 %b Battery status, empty means high, `-' means low,
538 `!' means critical, and `+' means charging
539 %P Advanced power saving mode state (verbose)
540 %p Battery charge percentage
541 %s Remaining battery charge time in seconds
542 %m Remaining battery charge time in minutes
543 %h Remaining battery charge time in hours
544 %t Remaining battery charge time in the form `h:min'"
545 (let* ((os-name (car (split-string
546 (shell-command-to-string "/usr/bin/uname"))))
547 (apm-flag (if (equal os-name "OpenBSD") "P" "s"))
548 (apm-cmd (concat "/usr/sbin/apm -ablm" apm-flag))
549 (apm-output (split-string (shell-command-to-string apm-cmd)))
550 ;; Battery status
551 (battery-status
552 (let ((stat (string-to-number (nth 0 apm-output))))
553 (cond ((eq stat 0) '("high" . ""))
554 ((eq stat 1) '("low" . "-"))
555 ((eq stat 2) '("critical" . "!"))
556 ((eq stat 3) '("charging" . "+"))
557 ((eq stat 4) '("absent" . nil)))))
558 ;; Battery percentage
559 (battery-percentage (nth 1 apm-output))
560 ;; Battery life
561 (battery-life (nth 2 apm-output))
562 ;; AC status
563 (line-status
564 (let ((ac (string-to-number (nth 3 apm-output))))
565 (cond ((eq ac 0) "disconnected")
566 ((eq ac 1) "connected")
567 ((eq ac 2) "backup power"))))
568 ;; Advanced power savings mode
569 (apm-mode
570 (let ((apm (string-to-number (nth 4 apm-output))))
571 (if (string= os-name "OpenBSD")
572 (cond ((eq apm 0) "manual")
573 ((eq apm 1) "automatic")
574 ((eq apm 2) "cool running"))
575 (if (eq apm 1) "on" "off"))))
576 seconds minutes hours remaining-time)
577 (unless (member battery-life '("unknown" "-1"))
578 (if (member os-name '("OpenBSD" "NetBSD"))
579 (setq minutes (string-to-number battery-life)
580 seconds (* 60 minutes))
581 (setq seconds (string-to-number battery-life)
582 minutes (truncate (/ seconds 60))))
583 (setq hours (truncate (/ minutes 60))
584 remaining-time (format "%d:%02d" hours
585 (- minutes (* 60 hours)))))
586 (list (cons ?L (or line-status "N/A"))
587 (cons ?B (or (car battery-status) "N/A"))
588 (cons ?b (or (cdr battery-status) "N/A"))
589 (cons ?p (if (string= battery-percentage "255")
590 "N/A"
591 battery-percentage))
592 (cons ?P (or apm-mode "N/A"))
593 (cons ?s (or (and seconds (number-to-string seconds)) "N/A"))
594 (cons ?m (or (and minutes (number-to-string minutes)) "N/A"))
595 (cons ?h (or (and hours (number-to-string hours)) "N/A"))
596 (cons ?t (or remaining-time "N/A")))))
599 ;;; `pmset' interface for Darwin (OS X).
601 (defun battery-pmset ()
602 "Get battery status information using `pmset'.
604 The following %-sequences are provided:
605 %L Power source (verbose)
606 %B Battery status (verbose)
607 %b Battery status, empty means high, `-' means low,
608 `!' means critical, and `+' means charging
609 %p Battery load percentage
610 %h Remaining time in hours
611 %m Remaining time in minutes
612 %t Remaining time in the form `h:min'"
613 (let (power-source load-percentage battery-status battery-status-symbol
614 remaining-time hours minutes)
615 (with-temp-buffer
616 (ignore-errors (call-process "pmset" nil t nil "-g" "ps"))
617 (goto-char (point-min))
618 (when (re-search-forward "Currentl?y drawing from '\\(AC\\|Battery\\) Power'" nil t)
619 (setq power-source (match-string 1))
620 (when (re-search-forward "^ -InternalBattery-0[ \t]+" nil t)
621 (when (looking-at "\\([0-9]\\{1,3\\}\\)%")
622 (setq load-percentage (match-string 1))
623 (goto-char (match-end 0))
624 (cond ((looking-at "; charging")
625 (setq battery-status "charging"
626 battery-status-symbol "+"))
627 ((< (string-to-number load-percentage) battery-load-low)
628 (setq battery-status "low"
629 battery-status-symbol "-"))
630 ((< (string-to-number load-percentage) battery-load-critical)
631 (setq battery-status "critical"
632 battery-status-symbol "!"))
634 (setq battery-status "high"
635 battery-status-symbol "")))
636 (when (re-search-forward "\\(\\([0-9]+\\):\\([0-9]+\\)\\) remaining" nil t)
637 (setq remaining-time (match-string 1))
638 (let ((h (string-to-number (match-string 2)))
639 (m (string-to-number (match-string 3))))
640 (setq hours (number-to-string (+ h (if (< m 30) 0 1)))
641 minutes (number-to-string (+ (* h 60) m)))))))))
642 (list (cons ?L (or power-source "N/A"))
643 (cons ?p (or load-percentage "N/A"))
644 (cons ?B (or battery-status "N/A"))
645 (cons ?b (or battery-status-symbol ""))
646 (cons ?h (or hours "N/A"))
647 (cons ?m (or minutes "N/A"))
648 (cons ?t (or remaining-time "N/A")))))
651 ;;; Private functions.
653 (defun battery-format (format alist)
654 "Substitute %-sequences in FORMAT."
655 (replace-regexp-in-string
656 "%."
657 (lambda (str)
658 (let ((char (aref str 1)))
659 (if (eq char ?%) "%"
660 (or (cdr (assoc char alist)) ""))))
661 format t t))
663 (defun battery-search-for-one-match-in-files (files regexp match-num)
664 "Search REGEXP in the content of the files listed in FILES.
665 If a match occurred, return the parenthesized expression numbered by
666 MATCH-NUM in the match. Otherwise, return nil."
667 (with-temp-buffer
668 (catch 'found
669 (dolist (file files)
670 (and (ignore-errors (insert-file-contents file nil nil nil 'replace))
671 (re-search-forward regexp nil t)
672 (throw 'found (match-string match-num)))))))
675 (provide 'battery)
677 ;;; battery.el ends here