mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-11 09:20:51 +00:00
1096 lines
46 KiB
EmacsLisp
1096 lines
46 KiB
EmacsLisp
;;; battery.el --- display battery status information -*- lexical-binding:t -*-
|
||
|
||
;; Copyright (C) 1997-1998, 2000-2023 Free Software Foundation, Inc.
|
||
|
||
;; Author: Ralph Schleicher <rs@ralph-schleicher.de>
|
||
;; Maintainer: emacs-devel@gnu.org
|
||
;; Keywords: hardware
|
||
|
||
;; This file is part of GNU Emacs.
|
||
|
||
;; GNU Emacs is free software: you can redistribute it and/or modify
|
||
;; it under the terms of the GNU General Public License as published by
|
||
;; the Free Software Foundation, either version 3 of the License, or
|
||
;; (at your option) any later version.
|
||
|
||
;; GNU Emacs is distributed in the hope that it will be useful,
|
||
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;; GNU General Public License for more details.
|
||
|
||
;; You should have received a copy of the GNU General Public License
|
||
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
|
||
|
||
;;; Commentary:
|
||
|
||
;; There is at present support for GNU/Linux, BSD, macOS, and Windows.
|
||
;; This library supports:
|
||
;; - UPower (https://upower.freedesktop.org) via D-Bus API.
|
||
;; - The `/sys/class/power_supply/' files of Linux >= 2.6.39.
|
||
;; - The `/proc/acpi/' directory structure of Linux 2.4.20 and 2.6.
|
||
;; - The `/proc/apm' file format of Linux version 1.3.58 or newer.
|
||
;; - BSD by using the `apm' program.
|
||
;; - Darwin (macOS) by using the `pmset' program.
|
||
;; - Windows via the GetSystemPowerStatus API call.
|
||
|
||
;;; Code:
|
||
|
||
(require 'dbus)
|
||
(eval-when-compile (require 'cl-lib))
|
||
|
||
(defgroup battery nil
|
||
"Display battery status information."
|
||
:prefix "battery-"
|
||
:group 'hardware)
|
||
|
||
(defcustom battery-upower-device nil
|
||
"Preferred UPower device name(s).
|
||
When `battery-status-function' is set to `battery-upower', this
|
||
user option specifies which power sources to query for status
|
||
information and merge into a single report.
|
||
|
||
When nil (the default), `battery-upower' queries all present
|
||
battery and line power devices as determined by the UPower
|
||
EnumerateDevices method. A string or a nonempty list of strings
|
||
names particular devices to query instead. UPower battery and
|
||
line power device names typically follow the patterns
|
||
\"battery_BATN\" and \"line_power_ACN\", respectively, with N
|
||
starting at 0 when present. Device names should not include the
|
||
leading D-Bus path \"/org/freedesktop/UPower/devices/\"."
|
||
:version "28.1"
|
||
:type '(choice (const :tag "Autodetect all devices" nil)
|
||
(string :tag "Device")
|
||
(repeat :tag "Devices" string)))
|
||
|
||
(defcustom battery-upower-subscribe t
|
||
"Whether to subscribe to UPower device change signals.
|
||
When nil, battery status information is polled every
|
||
`battery-update-interval' seconds. When non-nil (the default),
|
||
the battery status is also updated whenever a power source is
|
||
added or removed, or when the system starts or stops running on
|
||
battery power.
|
||
|
||
This only takes effect when `battery-status-function' is set to
|
||
`battery-upower' before enabling `display-battery-mode'."
|
||
:version "28.1"
|
||
:type 'boolean)
|
||
|
||
(defconst battery-upower-service "org.freedesktop.UPower"
|
||
"Well-known name of the UPower D-Bus service.
|
||
See URL `https://upower.freedesktop.org/docs/ref-dbus.html'.")
|
||
|
||
(defun battery--files (dir)
|
||
"Return a list of absolute file names in DIR or nil on error.
|
||
Value does not include \".\" or \"..\"."
|
||
(ignore-errors (directory-files dir t directory-files-no-dot-files-regexp)))
|
||
|
||
(defun battery--find-linux-sysfs-batteries ()
|
||
"Return a list of all sysfs battery directories."
|
||
(let (dirs)
|
||
(dolist (dir (battery--files "/sys/class/power_supply/"))
|
||
(when (file-exists-p (expand-file-name "capacity" dir))
|
||
(push dir dirs)))
|
||
(nreverse dirs)))
|
||
|
||
(defcustom battery-status-function
|
||
(cond ((member battery-upower-service (dbus-list-activatable-names))
|
||
#'battery-upower)
|
||
((and (eq system-type 'gnu/linux)
|
||
(file-readable-p "/sys/")
|
||
(battery--find-linux-sysfs-batteries))
|
||
#'battery-linux-sysfs)
|
||
((and (eq system-type 'gnu/linux)
|
||
(file-directory-p "/proc/acpi/battery"))
|
||
#'battery-linux-proc-acpi)
|
||
((and (eq system-type 'gnu/linux)
|
||
(file-readable-p "/proc/")
|
||
(file-readable-p "/proc/apm"))
|
||
#'battery-linux-proc-apm)
|
||
((and (eq system-type 'berkeley-unix)
|
||
(file-executable-p "/usr/sbin/apm"))
|
||
#'battery-bsd-apm)
|
||
((and (eq system-type 'darwin)
|
||
(ignore-errors
|
||
(with-temp-buffer
|
||
(and (eq (call-process "pmset" nil t nil "-g" "ps") 0)
|
||
(not (bobp))))))
|
||
#'battery-pmset)
|
||
((and (eq system-type 'haiku)
|
||
;; TODO: Support the Haiku APM battery driver.
|
||
(file-directory-p "/dev/power/acpi_battery"))
|
||
#'battery-haiku-acpi-battery)
|
||
((fboundp 'w32-battery-status)
|
||
#'w32-battery-status))
|
||
"Function for getting battery status information.
|
||
The function has to return an alist of conversion definitions.
|
||
Its cons cells are of the form
|
||
|
||
(CONVERSION . REPLACEMENT-TEXT)
|
||
|
||
CONVERSION is the character code of a \"conversion specification\"
|
||
introduced by a `%' character in a control string."
|
||
:version "28.1"
|
||
:type '(choice (const nil) function))
|
||
|
||
(defcustom battery-echo-area-format
|
||
"Power %L, battery %B (%p%% load, remaining time %t)"
|
||
"Control string formatting the string to display in the echo area.
|
||
Ordinary characters in the control string are printed as-is, while
|
||
conversion specifications introduced by a `%' character in the control
|
||
string are substituted as defined by the current value of the variable
|
||
`battery-status-function'. Here are the ones generally available:
|
||
%c Current capacity (mAh or mWh)
|
||
%r Current rate of charge or discharge
|
||
%L AC line status (verbose)
|
||
%B Battery status (verbose)
|
||
%b Battery status: empty means high, `-' means low,
|
||
`!' means critical, and `+' means charging
|
||
%d Temperature (in degrees Celsius)
|
||
%p Battery load percentage
|
||
%s Remaining time (to charge or discharge) in seconds
|
||
%m Remaining time (to charge or discharge) in minutes
|
||
%h Remaining time (to charge or discharge) in hours
|
||
%t Remaining time (to charge or discharge) in the form `h:min'
|
||
|
||
The full `format-spec' formatting syntax is supported."
|
||
:link '(info-link "(elisp) Custom Format Strings")
|
||
:type '(choice string (const nil)))
|
||
|
||
(defvar battery-mode-line-string nil
|
||
"String to display in the mode line.")
|
||
;;;###autoload (put 'battery-mode-line-string 'risky-local-variable t)
|
||
|
||
(defcustom battery-mode-line-limit 100
|
||
"Percentage of full battery load below which display battery status."
|
||
:version "24.1"
|
||
:type 'integer)
|
||
|
||
(defcustom battery-mode-line-format
|
||
(cond ((eq battery-status-function #'battery-linux-proc-acpi)
|
||
"[%b%p%%,%d°C] ")
|
||
(battery-status-function
|
||
"[%b%p%%] "))
|
||
"Control string formatting the string to display in the mode line.
|
||
Ordinary characters in the control string are printed as-is, while
|
||
conversion specifications introduced by a `%' character in the control
|
||
string are substituted as defined by the current value of the variable
|
||
`battery-status-function'. Here are the ones generally available:
|
||
%c Current capacity (mAh or mWh)
|
||
%r Current rate of charge or discharge
|
||
%L AC line status (verbose)
|
||
%B Battery status (verbose)
|
||
%b Battery status: empty means high, `-' means low,
|
||
`!' means critical, and `+' means charging
|
||
%d Temperature (in degrees Celsius)
|
||
%p Battery load percentage
|
||
%s Remaining time (to charge or discharge) in seconds
|
||
%m Remaining time (to charge or discharge) in minutes
|
||
%h Remaining time (to charge or discharge) in hours
|
||
%t Remaining time (to charge or discharge) in the form `h:min'
|
||
|
||
The full `format-spec' formatting syntax is supported."
|
||
:link '(info-link "(elisp) Custom Format Strings")
|
||
:type '(choice string (const nil)))
|
||
|
||
(defcustom battery-update-interval 60
|
||
"Seconds after which the battery status will be updated."
|
||
:type 'integer)
|
||
|
||
(defcustom battery-load-low 25
|
||
"Upper bound of low battery load percentage.
|
||
A battery load percentage below this number is considered low."
|
||
:type 'integer)
|
||
|
||
(defcustom battery-load-critical 10
|
||
"Upper bound of critical battery load percentage.
|
||
A battery load percentage below this number is considered critical."
|
||
:type 'integer)
|
||
|
||
(defface battery-load-low
|
||
'((t :inherit warning))
|
||
"Face used in mode line string when battery load is low.
|
||
See the option `battery-load-low'."
|
||
:version "28.1")
|
||
|
||
(defface battery-load-critical
|
||
'((t :inherit error))
|
||
"Face used in mode line string when battery load is critical.
|
||
See the option `battery-load-critical'."
|
||
:version "28.1")
|
||
|
||
(defvar battery-update-timer nil
|
||
"Interval timer object.")
|
||
|
||
;;;###autoload
|
||
(defun battery ()
|
||
"Display battery status information in the echo area.
|
||
The text being displayed in the echo area is controlled by the variables
|
||
`battery-echo-area-format' and `battery-status-function'."
|
||
(interactive)
|
||
(message "%s" (if (and battery-echo-area-format battery-status-function)
|
||
(battery-format battery-echo-area-format
|
||
(funcall battery-status-function))
|
||
"Battery status not available")))
|
||
|
||
(defcustom battery-update-functions nil
|
||
"Functions run by `display-battery-mode' after updating the status.
|
||
These functions will be called with one parameter, an alist that
|
||
contains data about the current battery status. The keys in the
|
||
alist are single characters and the values are strings.
|
||
Different battery backends deliver different information, so some
|
||
of the following information may or may not be available:
|
||
|
||
v: driver-version
|
||
V: bios-version
|
||
I: bios-interface
|
||
L: line-status
|
||
B: battery-status
|
||
b: battery-status-symbol
|
||
p: load-percentage
|
||
s: seconds
|
||
m: minutes
|
||
h: hours
|
||
t: remaining-time
|
||
|
||
For instance, to play an alarm when the battery power dips below
|
||
10%, you could use a function like the following:
|
||
|
||
(defvar my-prev-battery nil)
|
||
(defun my-battery-alarm (data)
|
||
(when (and my-prev-battery
|
||
(equal (alist-get ?L data) \"off-line\")
|
||
(< (string-to-number (alist-get ?p data)) 10)
|
||
(>= (string-to-number (alist-get ?p my-prev-battery)) 10))
|
||
(play-sound-file \"~/alarm.wav\" 5))
|
||
(setq my-prev-battery data))"
|
||
:version "29.1"
|
||
:type '(repeat function))
|
||
|
||
;;;###autoload
|
||
(define-minor-mode display-battery-mode
|
||
"Toggle battery status display in mode line (Display Battery mode).
|
||
|
||
The text displayed in the mode line is controlled by
|
||
`battery-mode-line-format' and `battery-status-function'.
|
||
The mode line is be updated every `battery-update-interval'
|
||
seconds.
|
||
|
||
The function which updates the mode-line display will call the
|
||
functions in `battery-update-functions', which can be used to
|
||
trigger actions based on battery-related events."
|
||
:global t
|
||
(setq battery-mode-line-string "")
|
||
(or global-mode-string (setq global-mode-string '("")))
|
||
(and battery-update-timer (cancel-timer battery-update-timer))
|
||
(battery--upower-unsubscribe)
|
||
(if (and battery-status-function battery-mode-line-format)
|
||
(if (not display-battery-mode)
|
||
(setq global-mode-string
|
||
(delq 'battery-mode-line-string global-mode-string))
|
||
(add-to-list 'global-mode-string 'battery-mode-line-string t)
|
||
(and (eq battery-status-function #'battery-upower)
|
||
battery-upower-subscribe
|
||
(battery--upower-subscribe))
|
||
(setq battery-update-timer (run-at-time nil battery-update-interval
|
||
#'battery-update-handler))
|
||
(battery-update))
|
||
(message "Battery status not available")
|
||
(setq display-battery-mode nil)))
|
||
|
||
(defun battery-update-handler ()
|
||
(battery-update)
|
||
(sit-for 0))
|
||
|
||
(defun battery-update ()
|
||
"Update battery status information in the mode line."
|
||
(let* ((data (and battery-status-function (funcall battery-status-function)))
|
||
(percentage (car (read-from-string (cdr (assq ?p data)))))
|
||
(res (and battery-mode-line-format
|
||
(or (not (numberp percentage))
|
||
(<= percentage battery-mode-line-limit))
|
||
(battery-format battery-mode-line-format data)))
|
||
(len (length res)))
|
||
(unless (zerop len)
|
||
(cond ((not (numberp percentage)))
|
||
((< percentage battery-load-critical)
|
||
(add-face-text-property 0 len 'battery-load-critical t res))
|
||
((< percentage battery-load-low)
|
||
(add-face-text-property 0 len 'battery-load-low t res)))
|
||
(put-text-property 0 len 'help-echo "Battery status information" res))
|
||
(setq battery-mode-line-string (or res ""))
|
||
(run-hook-with-args 'battery-update-functions data))
|
||
(force-mode-line-update t))
|
||
|
||
|
||
;;; `/proc/apm' interface for Linux.
|
||
|
||
;; Regular expression matching contents of `/proc/apm'.
|
||
(rx-define battery--linux-proc-apm
|
||
(: bol (group (+ (not ?\s))) ; Driver version.
|
||
" " (group (+ (not ?\s))) ; APM BIOS version.
|
||
" 0x" (group (+ xdigit)) ; APM BIOS flags.
|
||
" 0x" (group (+ xdigit)) ; AC line status.
|
||
" 0x" (group (+ xdigit)) ; Battery status.
|
||
" 0x" (group (+ xdigit)) ; Battery flags.
|
||
" " (group (? ?-) (+ digit)) ?% ; Load percentage.
|
||
" " (group (? ?-) (+ digit)) ; Remaining time.
|
||
" " (group (* nonl)) ; Time unit
|
||
eol))
|
||
|
||
(defconst battery-linux-proc-apm-regexp (rx battery--linux-proc-apm)
|
||
"Regular expression matching contents of `/proc/apm'.")
|
||
(make-obsolete-variable 'battery-linux-proc-apm-regexp
|
||
"it is no longer used." "28.1")
|
||
|
||
(defun battery-linux-proc-apm ()
|
||
"Get APM status information from Linux (the kernel).
|
||
This function works only with the new `/proc/apm' format introduced
|
||
in Linux version 1.3.58.
|
||
|
||
The following %-sequences are provided:
|
||
%v Linux driver version
|
||
%V APM BIOS version
|
||
%I APM BIOS status (verbose)
|
||
%L AC line status (verbose)
|
||
%B Battery status (verbose)
|
||
%b Battery status, empty means high, `-' means low,
|
||
`!' means critical, and `+' means charging
|
||
%p Battery load percentage
|
||
%s Remaining time (to charge or discharge) in seconds
|
||
%m Remaining time (to charge or discharge) in minutes
|
||
%h Remaining time (to charge or discharge) in hours
|
||
%t Remaining time (to charge or discharge) in the form `h:min'"
|
||
(let ( driver-version bios-version bios-interface line-status
|
||
battery-status battery-status-symbol load-percentage
|
||
seconds minutes hours remaining-time tem )
|
||
(with-temp-buffer
|
||
(ignore-errors (insert-file-contents "/proc/apm"))
|
||
(when (re-search-forward (rx battery--linux-proc-apm) nil t)
|
||
(setq driver-version (match-string 1))
|
||
(setq bios-version (match-string 2))
|
||
(setq tem (string-to-number (match-string 3) 16))
|
||
(if (zerop (logand tem 2))
|
||
(setq bios-interface "not supported")
|
||
(setq bios-interface "enabled")
|
||
(cond ((/= (logand tem 16) 0) (setq bios-interface "disabled"))
|
||
((/= (logand tem 32) 0) (setq bios-interface "disengaged")))
|
||
(setq tem (string-to-number (match-string 4) 16))
|
||
(cond ((= tem 0) (setq line-status "off-line"))
|
||
((= tem 1) (setq line-status "on-line"))
|
||
((= tem 2) (setq line-status "on backup")))
|
||
(unless (= (string-to-number (match-string 6) 16) 255)
|
||
(setq tem (string-to-number (match-string 5) 16))
|
||
(cond ((= tem 0) (setq battery-status "high"
|
||
battery-status-symbol ""))
|
||
((= tem 1) (setq battery-status "low"
|
||
battery-status-symbol "-"))
|
||
((= tem 2) (setq battery-status "critical"
|
||
battery-status-symbol "!"))
|
||
((= tem 3) (setq battery-status "charging"
|
||
battery-status-symbol "+")))
|
||
(setq load-percentage (match-string 7))
|
||
(setq seconds (string-to-number (match-string 8)))
|
||
(and (string-equal (match-string 9) "min")
|
||
(setq seconds (* 60 seconds)))
|
||
(setq minutes (/ seconds 60)
|
||
hours (/ seconds 3600))
|
||
(setq remaining-time
|
||
(format "%d:%02d" hours (% minutes 60)))))))
|
||
(list (cons ?v (or driver-version "N/A"))
|
||
(cons ?V (or bios-version "N/A"))
|
||
(cons ?I (or bios-interface "N/A"))
|
||
(cons ?L (or line-status "N/A"))
|
||
(cons ?B (or battery-status "N/A"))
|
||
(cons ?b (or battery-status-symbol ""))
|
||
(cons ?p (or load-percentage "N/A"))
|
||
(cons ?s (if seconds (number-to-string seconds) "N/A"))
|
||
(cons ?m (if minutes (number-to-string minutes) "N/A"))
|
||
(cons ?h (if hours (number-to-string hours) "N/A"))
|
||
(cons ?t (or remaining-time "N/A")))))
|
||
|
||
|
||
;;; `/proc/acpi/' interface for Linux.
|
||
|
||
(rx-define battery--acpi-rate (&rest hour)
|
||
(: (group (+ digit)) " " (group ?m (in "AW") hour)))
|
||
(rx-define battery--acpi-capacity (battery--acpi-rate ?h))
|
||
|
||
(defun battery-linux-proc-acpi ()
|
||
"Get ACPI status information from Linux (the kernel).
|
||
This function works only with the `/proc/acpi/' interface
|
||
introduced in Linux version 2.4.20 and 2.6.0.
|
||
|
||
The following %-sequences are provided:
|
||
%c Current capacity (mAh)
|
||
%r Current rate of charge or discharge
|
||
%L AC line status (verbose)
|
||
%B Battery status (verbose)
|
||
%b Battery status, empty means high, `-' means low,
|
||
`!' means critical, and `+' means charging
|
||
%d Temperature (in degrees Celsius)
|
||
%p Battery load percentage
|
||
%m Remaining time (to charge or discharge) in minutes
|
||
%h Remaining time (to charge or discharge) in hours
|
||
%t Remaining time (to charge or discharge) in the form `h:min'"
|
||
(let ((design-capacity 0)
|
||
(last-full-capacity 0)
|
||
full-capacity
|
||
(warn 0)
|
||
(low 0)
|
||
capacity rate rate-type charging-state minutes hours)
|
||
;; ACPI provides information about each battery present in the system in
|
||
;; a separate subdirectory. We are going to merge the available
|
||
;; information together since displaying for a variable amount of
|
||
;; batteries seems overkill for format-strings.
|
||
(with-temp-buffer
|
||
(dolist (dir (battery--files "/proc/acpi/battery/"))
|
||
(ignore-errors
|
||
(insert-file-contents (expand-file-name "state" dir) nil nil nil t))
|
||
(goto-char (point-min))
|
||
(when (re-search-forward (rx "present:" (+ space) "yes" eol) nil t)
|
||
(and (re-search-forward (rx "charging state:" (+ space)
|
||
(group (not space) (* nonl)) eol)
|
||
nil t)
|
||
(member charging-state '("unknown" "charged" nil))
|
||
;; On most multi-battery systems, most of the time only one
|
||
;; battery is "charging"/"discharging", the others are
|
||
;; "unknown".
|
||
(setq charging-state (match-string 1)))
|
||
(when (re-search-forward (rx "present rate:" (+ space)
|
||
(battery--acpi-rate) eol)
|
||
nil t)
|
||
(setq rate (+ (or rate 0) (string-to-number (match-string 1))))
|
||
(when (> rate 0)
|
||
(cond ((not rate-type)
|
||
(setq rate-type (match-string 2)))
|
||
((not (string= rate-type (match-string 2)))
|
||
(error "Inconsistent rate types (%s vs. %s)"
|
||
rate-type (match-string 2))))))
|
||
(when (re-search-forward (rx "remaining capacity:" (+ space)
|
||
battery--acpi-capacity eol)
|
||
nil t)
|
||
(setq capacity
|
||
(+ (or capacity 0) (string-to-number (match-string 1))))))
|
||
(goto-char (point-max))
|
||
(ignore-errors (insert-file-contents (expand-file-name "info" dir)))
|
||
(when (re-search-forward (rx "present:" (+ space) "yes" eol) nil t)
|
||
(when (re-search-forward (rx "design capacity:" (+ space)
|
||
battery--acpi-capacity eol)
|
||
nil t)
|
||
(cl-incf design-capacity (string-to-number (match-string 1))))
|
||
(when (re-search-forward (rx "last full capacity:" (+ space)
|
||
battery--acpi-capacity eol)
|
||
nil t)
|
||
(cl-incf last-full-capacity (string-to-number (match-string 1))))
|
||
(when (re-search-forward (rx "design capacity warning:" (+ space)
|
||
battery--acpi-capacity eol)
|
||
nil t)
|
||
(cl-incf warn (string-to-number (match-string 1))))
|
||
(when (re-search-forward (rx "design capacity low:" (+ space)
|
||
battery--acpi-capacity eol)
|
||
nil t)
|
||
(cl-incf low (string-to-number (match-string 1)))))))
|
||
(setq full-capacity (if (> last-full-capacity 0)
|
||
last-full-capacity design-capacity))
|
||
(and capacity rate
|
||
(setq minutes (if (zerop rate) 0
|
||
(floor (* (if (string= charging-state
|
||
"charging")
|
||
(- full-capacity capacity)
|
||
capacity)
|
||
60)
|
||
rate))
|
||
hours (/ minutes 60)))
|
||
(list (cons ?c (if capacity (number-to-string capacity) "N/A"))
|
||
(cons ?L (or (battery-search-for-one-match-in-files
|
||
(mapcar (lambda (d) (expand-file-name "state" d))
|
||
(battery--files "/proc/acpi/ac_adapter/"))
|
||
(rx "state:" (+ space) (group (not space) (* nonl)) eol)
|
||
1)
|
||
"N/A"))
|
||
(cons ?d (or (battery-search-for-one-match-in-files
|
||
(mapcar (lambda (d) (expand-file-name "temperature" d))
|
||
(battery--files "/proc/acpi/thermal_zone/"))
|
||
(rx "temperature:" (+ space) (group (+ digit)) " C" eol)
|
||
1)
|
||
"N/A"))
|
||
(cons ?r (if rate
|
||
(concat (number-to-string rate) " " rate-type)
|
||
"N/A"))
|
||
(cons ?B (or charging-state "N/A"))
|
||
(cons ?b (cond ((string= charging-state "charging") "+")
|
||
((and capacity (< capacity low)) "!")
|
||
((and capacity (< capacity warn)) "-")
|
||
("")))
|
||
(cons ?h (if hours (number-to-string hours) "N/A"))
|
||
(cons ?m (if minutes (number-to-string minutes) "N/A"))
|
||
(cons ?t (if minutes (format "%d:%02d" hours (% minutes 60)) "N/A"))
|
||
(cons ?p (if (and full-capacity capacity (> full-capacity 0))
|
||
(number-to-string (floor (* 100 capacity) full-capacity))
|
||
"N/A")))))
|
||
|
||
|
||
;;; `/sys/class/power_supply/BATN' interface for Linux.
|
||
|
||
(defun battery-linux-sysfs ()
|
||
"Get sysfs status information from Linux kernel.
|
||
This function works only with the new `/sys/class/power_supply/'
|
||
interface introduced in Linux version 2.4.25.
|
||
|
||
The following %-sequences are provided:
|
||
%c Current capacity (mAh or mWh)
|
||
%r Current rate of charge or discharge
|
||
%L Power source (verbose)
|
||
%B Battery status (verbose)
|
||
%b Battery status, empty means high, `-' means low,
|
||
`!' means critical, and `+' means charging
|
||
%d Temperature (in degrees Celsius)
|
||
%p Battery load percentage
|
||
%m Remaining time (to charge or discharge) in minutes
|
||
%h Remaining time (to charge or discharge) in hours
|
||
%t Remaining time (to charge or discharge) in the form `h:min'"
|
||
(let (;; Some batteries report charges and current, others energy and power.
|
||
;; In order to reliably be able to combine those data, we convert them
|
||
;; all to energy/power (since we can't combine different charges if
|
||
;; they're not at the same voltage).
|
||
(energy-full 0.0)
|
||
(energy-now 0.0)
|
||
(power-now 0.0)
|
||
(voltage-now 10.8) ; Arbitrary default, in case the info is missing.
|
||
charging-state temperature hours percentage-now)
|
||
;; SysFS provides information about each battery present in the
|
||
;; system in a separate subdirectory. We are going to merge the
|
||
;; available information together.
|
||
(with-temp-buffer
|
||
(dolist (dir (battery--find-linux-sysfs-batteries))
|
||
(ignore-errors
|
||
(insert-file-contents (expand-file-name "uevent" dir) nil nil nil t))
|
||
(goto-char (point-min))
|
||
(when (re-search-forward
|
||
"POWER_SUPPLY_VOLTAGE_NOW=\\([0-9]*\\)$" nil t)
|
||
(setq voltage-now (/ (string-to-number (match-string 1)) 1000000.0)))
|
||
(goto-char (point-min))
|
||
(when (re-search-forward "POWER_SUPPLY_PRESENT=1$" nil t)
|
||
(goto-char (point-min))
|
||
(and (re-search-forward "POWER_SUPPLY_STATUS=\\(.*\\)$" nil t)
|
||
(member charging-state '("Unknown" "Full" nil))
|
||
(setq charging-state (match-string 1)))
|
||
(goto-char (point-min))
|
||
(when (re-search-forward
|
||
"POWER_SUPPLY_\\(CURRENT\\|POWER\\)_NOW=\\([0-9]*\\)$"
|
||
nil t)
|
||
(cl-incf power-now
|
||
(* (string-to-number (match-string 2))
|
||
(if (eq (char-after (match-beginning 1)) ?C)
|
||
voltage-now 1))))
|
||
(goto-char (point-min))
|
||
(when (re-search-forward "POWER_SUPPLY_TEMP=\\([0-9]*\\)$" nil t)
|
||
(setq temperature (match-string 1)))
|
||
(goto-char (point-min))
|
||
(let (full-string now-string)
|
||
;; Sysfs may list either charge (mAh) or energy (mWh).
|
||
;; Keep track of both, and choose which to report later.
|
||
(cond ((and (re-search-forward
|
||
"POWER_SUPPLY_CHARGE_FULL=\\([0-9]*\\)$" nil t)
|
||
(setq full-string (match-string 1))
|
||
(re-search-forward
|
||
"POWER_SUPPLY_CHARGE_NOW=\\([0-9]*\\)$" nil t)
|
||
(setq now-string (match-string 1)))
|
||
(cl-incf energy-full (* (string-to-number full-string)
|
||
voltage-now))
|
||
(cl-incf energy-now (* (string-to-number now-string)
|
||
voltage-now)))
|
||
((and (goto-char (point-min))
|
||
(re-search-forward
|
||
"POWER_SUPPLY_ENERGY_FULL=\\([0-9]*\\)$" nil t)
|
||
(setq full-string (match-string 1))
|
||
(re-search-forward
|
||
"POWER_SUPPLY_ENERGY_NOW=\\([0-9]*\\)$" nil t)
|
||
(setq now-string (match-string 1)))
|
||
(cl-incf energy-full (string-to-number full-string))
|
||
(cl-incf energy-now (string-to-number now-string)))))
|
||
(unless (zerop power-now)
|
||
(let ((remaining (if (string= charging-state "Discharging")
|
||
energy-now
|
||
(- energy-full energy-now))))
|
||
(setq hours (/ remaining power-now)))))))
|
||
(when (and (> energy-full 0) (> energy-now 0))
|
||
(setq percentage-now (/ (* 100 energy-now) energy-full)))
|
||
(list (cons ?c (if (or (> energy-full 0) (> energy-now 0))
|
||
(number-to-string (/ energy-now voltage-now))
|
||
"N/A"))
|
||
(cons ?r (if (> power-now 0.0)
|
||
(format "%.1f" (/ power-now 1000000.0))
|
||
"N/A"))
|
||
(cons ?m (if hours (format "%d" (* hours 60)) "N/A"))
|
||
(cons ?h (if hours (format "%d" hours) "N/A"))
|
||
(cons ?t (if hours
|
||
(format "%d:%02d" hours (* (- hours (floor hours)) 60))
|
||
"N/A"))
|
||
(cons ?d (or temperature "N/A"))
|
||
(cons ?B (or charging-state "N/A"))
|
||
(cons ?b (cond ((string= charging-state "Charging") "+")
|
||
((not percentage-now) "")
|
||
((< percentage-now battery-load-critical) "!")
|
||
((< percentage-now battery-load-low) "-")
|
||
("")))
|
||
(cons ?p (if percentage-now (format "%.1f" percentage-now) "N/A"))
|
||
(cons ?L (pcase (battery-search-for-one-match-in-files
|
||
'("/sys/class/power_supply/AC/online"
|
||
"/sys/class/power_supply/ACAD/online"
|
||
"/sys/class/power_supply/ADP1/online")
|
||
(rx (in "01")) 0)
|
||
("0" "BAT")
|
||
("1" "AC")
|
||
(_ "N/A"))))))
|
||
|
||
|
||
;;; `/dev/power/acpi_battery' interface for Haiku.
|
||
|
||
(defun battery--search-haiku-acpi-status ()
|
||
"Search forward for battery status in the current buffer.
|
||
Return a property list once all relevant properties are found.
|
||
The following properties may be inside the list:
|
||
|
||
- `:capacity' (the current capacity of the battery.)
|
||
- `:voltage' (the current voltage of the battery.)
|
||
- `:rate', (the current rate of charge or discharge.)
|
||
- `:state' (the current state of the battery.)
|
||
- `:design-capacity' (the design capacity of the battery.)
|
||
- `:design-voltage' (the design voltage of the battery.)
|
||
- `:last-full-charge' (the capacity at the last full charge of
|
||
the battery.)
|
||
|
||
`:capacity' and `:design-capacity' are both represented in
|
||
terms of milliamp-hours."
|
||
(let ((state-regexp "State \\([[:digit:]]+\\), Current Rate \\([[:digit:]]+\\), \
|
||
Capacity \\([[:digit:]]+\\), Voltage \\([[:digit:]]+\\)")
|
||
(pu-regexp "Power Unit \\([[:digit:]]\\)+, Design Capacity \\([[:digit:]]+\\), \
|
||
Last Full Charge \\([[:digit:]]+\\)")
|
||
(design-regexp "Design Voltage \\([[:digit:]]+\\)")
|
||
power-unit last-full-charge state rate capacity
|
||
voltage design-capacity design-voltage)
|
||
(when (re-search-forward state-regexp)
|
||
(setq state (string-to-number (match-string 1)))
|
||
(setq rate (string-to-number (match-string 2)))
|
||
(setq capacity (string-to-number (match-string 3)))
|
||
(setq voltage (/ (string-to-number (match-string 4)) 1000.0)))
|
||
(when (re-search-forward pu-regexp)
|
||
(setq power-unit (string-to-number (match-string 1)))
|
||
(setq design-capacity (string-to-number (match-string 2)))
|
||
(setq last-full-charge (string-to-number (match-string 3))))
|
||
(when (re-search-forward design-regexp)
|
||
(setq design-voltage (/ (string-to-number (match-string 1)) 1000.0)))
|
||
;; Convert capacity fields to milliamp-hours if they're
|
||
;; specified as miliwatt-hours.
|
||
(when (eq power-unit 0)
|
||
(setq capacity (/ capacity voltage))
|
||
(setq design-capacity (/ design-capacity design-voltage))
|
||
(setq last-full-charge (/ last-full-charge voltage)))
|
||
(list :capacity capacity :voltage voltage
|
||
:rate rate :state (cond
|
||
((not (zerop (logand state 2))) 'charging)
|
||
((not (zerop (logand state 1))) 'discharging)
|
||
((not (zerop (logand state 4))) 'critical)
|
||
(t 'fully-charged))
|
||
:design-capacity design-capacity
|
||
:design-voltage design-voltage
|
||
:last-full-charge last-full-charge)))
|
||
|
||
(defun battery-haiku-acpi-battery ()
|
||
"Get battery status from `/dev/power/acpi_battery'.
|
||
This function only works on Haiku systems with an ACPI battery.
|
||
|
||
The following %-sequences are provided:
|
||
%c Current capacity (mAh)
|
||
%r Current rate of charge or discharge
|
||
%L AC line status (verbose)
|
||
%B Battery status (verbose)
|
||
%b Battery status: empty means high, `-' means low,
|
||
`!' means critical, and `+' means charging
|
||
%p Battery load percentage"
|
||
(with-temp-buffer
|
||
(dolist (file (battery--files "/dev/power/acpi_battery"))
|
||
(insert-file-contents (expand-file-name file "/dev/power/acpi_battery")))
|
||
;; I don't think Haiku actually supports multiple batteries yet,
|
||
;; since the code in PowerStatus doesn't take care of that
|
||
;; situation.
|
||
(let ((list (ignore-errors (battery--search-haiku-acpi-status))))
|
||
(if list
|
||
(list (cons ?c (format "%.0f" (plist-get list :capacity)))
|
||
(cons ?r (format "%.0f" (plist-get list :rate)))
|
||
(cons ?B (symbol-name (plist-get list :state)))
|
||
(cons ?b (let ((state (plist-get list :state)))
|
||
(cond
|
||
((eq state 'charging) "+")
|
||
((and (eq state 'discharging)
|
||
(< (/ (plist-get list :capacity)
|
||
(plist-get list :last-full-charge))
|
||
0.15))
|
||
"-")
|
||
((eq state 'critical) "!")
|
||
(t ""))))
|
||
(cons ?L (if (not (eq (plist-get list :state) 'discharging))
|
||
"on-line" "off-line"))
|
||
(cons ?p (format "%.0f"
|
||
(* 100 (/ (plist-get list :capacity)
|
||
(plist-get list :last-full-charge))))))
|
||
'((?c . "N/A")
|
||
(?r . "N/A")
|
||
(?B . "N/A")
|
||
(?b . "N/A")
|
||
(?p . "N/A"))))))
|
||
|
||
|
||
;;; UPower interface.
|
||
|
||
(defconst battery-upower-interface "org.freedesktop.UPower"
|
||
"Name of the UPower D-Bus interface.
|
||
See URL `https://upower.freedesktop.org/docs/UPower.html'.")
|
||
|
||
(defconst battery-upower-path "/org/freedesktop/UPower"
|
||
"D-Bus object providing `battery-upower-interface'.")
|
||
|
||
(defconst battery-upower-device-interface "org.freedesktop.UPower.Device"
|
||
"Name of the UPower Device D-Bus interface.
|
||
See URL `https://upower.freedesktop.org/docs/Device.html'.")
|
||
|
||
(defconst battery-upower-device-path "/org/freedesktop/UPower/devices"
|
||
"D-Bus object providing `battery-upower-device-interface'.")
|
||
|
||
(defvar battery--upower-signals nil
|
||
"Handles for UPower signal subscriptions.")
|
||
|
||
(defun battery--upower-signal-handler (&rest _)
|
||
"Update battery status on receiving a UPower D-Bus signal."
|
||
(timer-event-handler battery-update-timer))
|
||
|
||
(defun battery--upower-props-changed (_interface changed _invalidated)
|
||
"Update status when system starts/stops running on battery.
|
||
Intended as a UPower PropertiesChanged signal handler."
|
||
(when (assoc "OnBattery" changed)
|
||
(battery--upower-signal-handler)))
|
||
|
||
(defun battery--upower-unsubscribe ()
|
||
"Unsubscribe from UPower device change signals."
|
||
(mapc #'dbus-unregister-object battery--upower-signals)
|
||
(setq battery--upower-signals ()))
|
||
|
||
(defun battery--upower-subscribe ()
|
||
"Subscribe to UPower device change signals."
|
||
(push (dbus-register-signal :system battery-upower-service
|
||
battery-upower-path
|
||
dbus-interface-properties
|
||
"PropertiesChanged"
|
||
#'battery--upower-props-changed)
|
||
battery--upower-signals)
|
||
(dolist (method '("DeviceAdded" "DeviceRemoved"))
|
||
(push (dbus-register-signal :system battery-upower-service
|
||
battery-upower-path
|
||
battery-upower-interface
|
||
method #'battery--upower-signal-handler)
|
||
battery--upower-signals)))
|
||
|
||
(defun battery--upower-device-properties (device)
|
||
"Return value for all available properties for the UPower DEVICE."
|
||
(dbus-get-all-properties
|
||
:system battery-upower-service
|
||
(expand-file-name device battery-upower-device-path)
|
||
battery-upower-device-interface))
|
||
|
||
(defun battery--upower-devices ()
|
||
"List all UPower devices according to `battery-upower-device'."
|
||
(cond ((stringp battery-upower-device)
|
||
(list battery-upower-device))
|
||
(battery-upower-device)
|
||
((dbus-ignore-errors
|
||
(dbus-call-method :system battery-upower-service
|
||
battery-upower-path
|
||
battery-upower-interface
|
||
"EnumerateDevices"
|
||
:timeout 1000)))))
|
||
|
||
(defun battery--upower-state (props state)
|
||
"Merge the UPower battery state in PROPS with STATE.
|
||
This is an extension of the UPower DisplayDevice algorithm for
|
||
merging multiple battery states into one. PROPS is an alist of
|
||
battery properties from `battery-upower-device-interface', and
|
||
STATE is a symbol representing the state to merge with."
|
||
;; Map UPower enum into our printable symbols.
|
||
(let* ((new (pcase (cdr (assoc "State" props))
|
||
(1 'charging)
|
||
(2 'discharging)
|
||
(3 'empty)
|
||
(4 'fully-charged)
|
||
(5 'pending-charge)
|
||
(6 'pending-discharge)))
|
||
;; Unknown state represented by nil.
|
||
(either (delq nil (list new state))))
|
||
;; Earlier states override later ones.
|
||
(car (cond ((memq 'charging either))
|
||
((memq 'discharging either))
|
||
((memq 'pending-charge either))
|
||
((memq 'pending-discharge either))
|
||
;; Only options left are full or empty,
|
||
;; but if they conflict return nil.
|
||
((null (cdr either)) either)
|
||
((apply #'eq either) either)))))
|
||
|
||
(defun battery-upower ()
|
||
"Get battery status from UPower D-Bus interface.
|
||
This function works only in systems that provide a UPower D-Bus
|
||
service.
|
||
|
||
The following %-sequences are provided:
|
||
%c Current capacity (mWh)
|
||
%r Current rate of charge or discharge
|
||
%L AC line status (verbose)
|
||
%B Battery status (verbose)
|
||
%b Battery status: empty means high, `-' means low,
|
||
`!' means critical, and `+' means charging
|
||
%d Temperature (in degrees Celsius)
|
||
%p Battery load percentage
|
||
%s Remaining time (to charge or discharge) in seconds
|
||
%m Remaining time (to charge or discharge) in minutes
|
||
%h Remaining time (to charge or discharge) in hours
|
||
%t Remaining time (to charge or discharge) in the form `h:min'"
|
||
(let ((count 0) props type line-status state load temperature
|
||
secs mins hrs total-energy total-rate total-tte total-ttf)
|
||
;; Merge information from all available or specified UPower
|
||
;; devices like other `battery-status-function's.
|
||
(dolist (device (battery--upower-devices))
|
||
(setq props (battery--upower-device-properties device))
|
||
(setq type (cdr (assoc "Type" props)))
|
||
(cond
|
||
((and (eq type 1) (not (eq line-status 'online)))
|
||
;; It's a line power device: `online' if currently providing
|
||
;; power, any other non-nil value if simply present.
|
||
(setq line-status (if (cdr (assoc "Online" props)) 'online t)))
|
||
((and (eq type 2) (cdr (assoc "IsPresent" props)))
|
||
;; It's a battery.
|
||
(setq count (1+ count))
|
||
(setq state (battery--upower-state props state))
|
||
(let ((energy (cdr (assoc "Energy" props)))
|
||
(rate (cdr (assoc "EnergyRate" props)))
|
||
(percent (cdr (assoc "Percentage" props)))
|
||
(temp (cdr (assoc "Temperature" props)))
|
||
(tte (cdr (assoc "TimeToEmpty" props)))
|
||
(ttf (cdr (assoc "TimeToFull" props))))
|
||
(when energy (setq total-energy (+ (or total-energy 0) energy)))
|
||
(when rate (setq total-rate (+ (or total-rate 0) rate)))
|
||
(when percent (setq load (+ (or load 0) percent)))
|
||
(when temp (setq temperature (+ (or temperature 0) temp)))
|
||
(when tte (setq total-tte (+ (or total-tte 0) tte)))
|
||
(when ttf (setq total-ttf (+ (or total-ttf 0) ttf)))))))
|
||
(when (> count 1)
|
||
;; Averages over multiple batteries.
|
||
(when load (setq load (/ load count)))
|
||
(when temperature (setq temperature (/ temperature count))))
|
||
(when (setq secs (if (eq line-status 'online) total-ttf total-tte))
|
||
(setq mins (/ secs 60))
|
||
(setq hrs (/ secs 3600)))
|
||
(list (cons ?c (if total-energy
|
||
(format "%.0f" (* total-energy 1000))
|
||
"N/A"))
|
||
(cons ?r (if total-rate (format "%.1f W" total-rate) "N/A"))
|
||
(cons ?L (cond ((eq line-status 'online) "on-line")
|
||
(line-status "off-line")
|
||
("N/A")))
|
||
(cons ?B (format "%s" (or state 'unknown)))
|
||
(cons ?b (cond ((eq state 'charging) "+")
|
||
((and load (< load battery-load-critical)) "!")
|
||
((and load (< load battery-load-low)) "-")
|
||
("")))
|
||
;; Zero usually means unknown.
|
||
(cons ?d (if (and temperature (/= temperature 0))
|
||
(format "%.0f" temperature)
|
||
"N/A"))
|
||
(cons ?p (if load (format "%.0f" load) "N/A"))
|
||
(cons ?s (if secs (number-to-string secs) "N/A"))
|
||
(cons ?m (if mins (number-to-string mins) "N/A"))
|
||
(cons ?h (if hrs (number-to-string hrs) "N/A"))
|
||
(cons ?t (if hrs (format "%d:%02d" hrs (% mins 60)) "N/A")))))
|
||
|
||
|
||
;;; `apm' interface for BSD.
|
||
|
||
;; This function is a wrapper on `call-process' that return the
|
||
;; standard output in a string. We are using it instead
|
||
;; `shell-command-to-string' because this last one is trying to run
|
||
;; PROGRAM on the remote host if the buffer is remote.
|
||
(defun battery--call-process-to-string (program &rest args)
|
||
(with-output-to-string
|
||
(with-current-buffer standard-output
|
||
(apply #'call-process program nil t nil args))))
|
||
|
||
(defun battery-bsd-apm ()
|
||
"Get APM status information from BSD apm binary.
|
||
The following %-sequences are provided:
|
||
%P Advanced power saving mode state (verbose)
|
||
%L AC line status (verbose)
|
||
%B Battery status (verbose)
|
||
%b Battery status, empty means high, `-' means low,
|
||
`!' means critical, and `+' means charging
|
||
%p Battery load percentage
|
||
%s Remaining time (to charge or discharge) in seconds
|
||
%m Remaining time (to charge or discharge) in minutes
|
||
%h Remaining time (to charge or discharge) in hours
|
||
%t Remaining time (to charge or discharge) in the form `h:min'"
|
||
(let* ((os-name (car (split-string
|
||
;; FIXME: Can't we use something like `system-type'?
|
||
(battery--call-process-to-string "uname"))))
|
||
(apm-flag (pcase os-name
|
||
("OpenBSD" "mP")
|
||
("FreeBSD" "st")
|
||
(_ "ms")))
|
||
(apm-args (concat "-abl" apm-flag))
|
||
(apm-output (split-string
|
||
(battery--call-process-to-string "apm" apm-args)))
|
||
(indices (pcase os-name
|
||
;; FreeBSD's manpage documents that multiple
|
||
;; outputs are ordered by "the order in which
|
||
;; they're listed in the manpage", which is alphabetical
|
||
;; and is also the order in which we pass them.
|
||
("FreeBSD" '((ac . 0)
|
||
(battery-status . 1)
|
||
(battery-percent . 2)
|
||
(apm-mode . 3)
|
||
(battery-life . 4)))
|
||
;; For NetBSD and OpenBSD, the manpage doesn't document
|
||
;; the order. The previous code used this order, so let's
|
||
;; assume it's right.
|
||
(_ '((ac . 3)
|
||
(battery-status . 0)
|
||
(battery-percent . 1)
|
||
(apm-mode . 4)
|
||
(battery-life . 2)))))
|
||
;; Battery status
|
||
(battery-status
|
||
(pcase (string-to-number
|
||
(nth (alist-get 'battery-status indices) apm-output))
|
||
(0 '("high" . ""))
|
||
(1 '("low" . "-"))
|
||
(2 '("critical" . "!"))
|
||
(3 '("charging" . "+"))
|
||
(4 '("absent" . nil))))
|
||
;; Battery percentage
|
||
(battery-percentage
|
||
(nth (alist-get 'battery-percent indices) apm-output))
|
||
;; Battery life
|
||
(battery-life (nth (alist-get 'battery-life indices) apm-output))
|
||
;; AC status
|
||
(line-status
|
||
(pcase (string-to-number (nth (alist-get 'ac indices) apm-output))
|
||
(0 "disconnected")
|
||
(1 "connected")
|
||
(2 "backup power")))
|
||
;; Advanced power savings mode
|
||
(apm-mode
|
||
(let ((apm (string-to-number
|
||
(nth (alist-get 'apm-mode indices) apm-output))))
|
||
(if (string= os-name "OpenBSD")
|
||
(pcase apm
|
||
(0 "manual")
|
||
(1 "automatic")
|
||
(2 "cool running"))
|
||
(if (eql apm 1) "on" "off"))))
|
||
seconds minutes hours remaining-time)
|
||
(unless (member battery-life '("unknown" "-1"))
|
||
(if (member os-name '("OpenBSD" "NetBSD"))
|
||
(setq minutes (string-to-number battery-life)
|
||
seconds (* 60 minutes))
|
||
(setq seconds (string-to-number battery-life)
|
||
minutes (truncate seconds 60)))
|
||
(setq hours (truncate minutes 60)
|
||
remaining-time (format "%d:%02d" hours (% minutes 60))))
|
||
(list (cons ?L (or line-status "N/A"))
|
||
(cons ?B (or (car battery-status) "N/A"))
|
||
(cons ?b (or (cdr battery-status) "N/A"))
|
||
(cons ?p (if (string= battery-percentage "255")
|
||
"N/A"
|
||
battery-percentage))
|
||
(cons ?P (or apm-mode "N/A"))
|
||
(cons ?s (if seconds (number-to-string seconds) "N/A"))
|
||
(cons ?m (if minutes (number-to-string minutes) "N/A"))
|
||
(cons ?h (if hours (number-to-string hours) "N/A"))
|
||
(cons ?t (or remaining-time "N/A")))))
|
||
|
||
|
||
;;; `pmset' interface for Darwin (macOS).
|
||
|
||
(defun battery-pmset ()
|
||
"Get battery status information using `pmset'.
|
||
|
||
The following %-sequences are provided:
|
||
%L Power source (verbose)
|
||
%B Battery status (verbose)
|
||
%b Battery status, empty means high, `-' means low,
|
||
`!' means critical, and `+' means charging
|
||
%p Battery load percentage
|
||
%m Remaining time (to charge or discharge) in minutes
|
||
%h Remaining time (to charge or discharge) in hours
|
||
%t Remaining time (to charge or discharge) in the form `h:min'"
|
||
(let ( power-source load-percentage battery-status battery-status-symbol
|
||
remaining-time hours minutes )
|
||
(with-temp-buffer
|
||
(ignore-errors (call-process "pmset" nil t nil "-g" "ps"))
|
||
(goto-char (point-min))
|
||
(when (re-search-forward ;; Handle old typo in output.
|
||
"\\(?:Currentl?y\\|Now\\) drawing from '\\(AC\\|Battery\\) Power'"
|
||
nil t)
|
||
(setq power-source (match-string 1))
|
||
(when (re-search-forward (rx bol " -InternalBattery-0" (+ space)
|
||
(* "(id=" (+ digit) ")" (+ space)))
|
||
nil t)
|
||
(when (looking-at "\\([0-9]\\{1,3\\}\\)%")
|
||
(setq load-percentage (match-string 1))
|
||
(goto-char (match-end 0))
|
||
(cond ((looking-at-p "; charging")
|
||
(setq battery-status "charging"
|
||
battery-status-symbol "+"))
|
||
((< (string-to-number load-percentage) battery-load-critical)
|
||
(setq battery-status "critical"
|
||
battery-status-symbol "!"))
|
||
((< (string-to-number load-percentage) battery-load-low)
|
||
(setq battery-status "low"
|
||
battery-status-symbol "-"))
|
||
(t
|
||
(setq battery-status "high"
|
||
battery-status-symbol "")))
|
||
(when (re-search-forward "\\(\\([0-9]+\\):\\([0-9]+\\)\\) remaining" nil t)
|
||
(setq remaining-time (match-string 1))
|
||
(let ((h (string-to-number (match-string 2)))
|
||
(m (string-to-number (match-string 3))))
|
||
(setq hours (number-to-string (+ h (if (< m 30) 0 1)))
|
||
minutes (number-to-string (+ (* h 60) m)))))))))
|
||
(list (cons ?L (or power-source "N/A"))
|
||
(cons ?p (or load-percentage "N/A"))
|
||
(cons ?B (or battery-status "N/A"))
|
||
(cons ?b (or battery-status-symbol ""))
|
||
(cons ?h (or hours "N/A"))
|
||
(cons ?m (or minutes "N/A"))
|
||
(cons ?t (or remaining-time "N/A")))))
|
||
|
||
|
||
;;; Private functions.
|
||
|
||
(defun battery-format (format alist)
|
||
"Substitute %-sequences in FORMAT."
|
||
(format-spec format alist 'delete))
|
||
|
||
(defun battery-search-for-one-match-in-files (files regexp match-num)
|
||
"Search REGEXP in the content of the files listed in FILES.
|
||
If a match occurred, return the parenthesized expression numbered by
|
||
MATCH-NUM in the match. Otherwise, return nil."
|
||
(with-temp-buffer
|
||
(catch 'found
|
||
(dolist (file files)
|
||
(and (ignore-errors (insert-file-contents file nil nil nil 'replace))
|
||
(re-search-forward regexp nil t)
|
||
(throw 'found (match-string match-num)))))))
|
||
|
||
|
||
(provide 'battery)
|
||
|
||
;;; battery.el ends here
|