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678 lines
25 KiB
EmacsLisp
678 lines
25 KiB
EmacsLisp
;;; battery.el --- display battery status information -*- coding: utf-8 -*-
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;; Copyright (C) 1997-1998, 2000-2014 Free Software Foundation, Inc.
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;; Author: Ralph Schleicher <rs@nunatak.allgaeu.org>
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;; Keywords: hardware
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; There is at present support for GNU/Linux, OS X and Windows. This
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;; library supports both the `/proc/apm' file format of Linux version
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;; 1.3.58 or newer and the `/proc/acpi/' directory structure of Linux
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;; 2.4.20 and 2.6. Darwin (OS X) is supported by using the `pmset'
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;; program. Windows is supported by the GetSystemPowerStatus API call.
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;;; Code:
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(require 'timer)
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(eval-when-compile (require 'cl-lib))
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(defgroup battery nil
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"Display battery status information."
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:prefix "battery-"
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:group 'hardware)
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;; Either BATn or yeeloong-bat, basically.
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(defconst battery--linux-sysfs-regexp "[bB][aA][tT][0-9]?$")
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(defcustom battery-status-function
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(cond ((and (eq system-type 'gnu/linux)
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(file-readable-p "/proc/apm"))
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'battery-linux-proc-apm)
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((and (eq system-type 'gnu/linux)
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(file-directory-p "/proc/acpi/battery"))
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'battery-linux-proc-acpi)
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((and (eq system-type 'gnu/linux)
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(file-directory-p "/sys/class/power_supply/")
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(directory-files "/sys/class/power_supply/" nil
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battery--linux-sysfs-regexp))
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'battery-linux-sysfs)
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((and (eq system-type 'berkeley-unix)
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(file-executable-p "/usr/sbin/apm"))
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'battery-bsd-apm)
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((and (eq system-type 'darwin)
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(condition-case nil
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(with-temp-buffer
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(and (eq (call-process "pmset" nil t nil "-g" "ps") 0)
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(> (buffer-size) 0)))
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(error nil)))
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'battery-pmset)
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((fboundp 'w32-battery-status)
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'w32-battery-status))
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"Function for getting battery status information.
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The function has to return an alist of conversion definitions.
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Its cons cells are of the form
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(CONVERSION . REPLACEMENT-TEXT)
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CONVERSION is the character code of a \"conversion specification\"
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introduced by a `%' character in a control string."
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:type '(choice (const nil) function)
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:group 'battery)
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(defcustom battery-echo-area-format
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(cond ((eq battery-status-function 'battery-linux-proc-acpi)
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"Power %L, battery %B at %r (%p%% load, remaining time %t)")
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((eq battery-status-function 'battery-linux-sysfs)
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"Power %L, battery %B (%p%% load, remaining time %t)")
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((eq battery-status-function 'battery-pmset)
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"%L power, battery %B (%p%% load, remaining time %t)")
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(battery-status-function
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"Power %L, battery %B (%p%% load, remaining time %t)"))
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"Control string formatting the string to display in the echo area.
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Ordinary characters in the control string are printed as-is, while
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conversion specifications introduced by a `%' character in the control
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string are substituted as defined by the current value of the variable
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`battery-status-function'. Here are the ones generally available:
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%c Current capacity (mAh or mWh)
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%r Current rate of charge or discharge
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%B Battery status (verbose)
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%b Battery status: empty means high, `-' means low,
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`!' means critical, and `+' means charging
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%d Temperature (in degrees Celsius)
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%L AC line status (verbose)
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%p Battery load percentage
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%m Remaining time (to charge or discharge) in minutes
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%h Remaining time (to charge or discharge) in hours
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%t Remaining time (to charge or discharge) in the form `h:min'"
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:type '(choice string (const nil))
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:group 'battery)
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(defvar battery-mode-line-string nil
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"String to display in the mode line.")
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;;;###autoload (put 'battery-mode-line-string 'risky-local-variable t)
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(defcustom battery-mode-line-limit 100
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"Percentage of full battery load below which display battery status"
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:version "24.1"
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:type 'integer
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:group 'battery)
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(defcustom battery-mode-line-format
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(cond ((eq battery-status-function 'battery-linux-proc-acpi)
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"[%b%p%%,%d°C]")
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(battery-status-function
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"[%b%p%%]"))
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"Control string formatting the string to display in the mode line.
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Ordinary characters in the control string are printed as-is, while
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conversion specifications introduced by a `%' character in the control
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string are substituted as defined by the current value of the variable
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`battery-status-function'. Here are the ones generally available:
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%c Current capacity (mAh or mWh)
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%r Current rate of charge or discharge
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%B Battery status (verbose)
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%b Battery status: empty means high, `-' means low,
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`!' means critical, and `+' means charging
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%d Temperature (in degrees Celsius)
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%L AC line status (verbose)
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%p Battery load percentage
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%m Remaining time (to charge or discharge) in minutes
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%h Remaining time (to charge or discharge) in hours
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%t Remaining time (to charge or discharge) in the form `h:min'"
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:type '(choice string (const nil))
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:group 'battery)
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(defcustom battery-update-interval 60
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"Seconds after which the battery status will be updated."
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:type 'integer
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:group 'battery)
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(defcustom battery-load-low 25
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"Upper bound of low battery load percentage.
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A battery load percentage below this number is considered low."
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:type 'integer
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:group 'battery)
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(defcustom battery-load-critical 10
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"Upper bound of critical battery load percentage.
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A battery load percentage below this number is considered critical."
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:type 'integer
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:group 'battery)
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(defvar battery-update-timer nil
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"Interval timer object.")
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;;;###autoload
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(defun battery ()
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"Display battery status information in the echo area.
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The text being displayed in the echo area is controlled by the variables
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`battery-echo-area-format' and `battery-status-function'."
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(interactive)
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(message "%s" (if (and battery-echo-area-format battery-status-function)
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(battery-format battery-echo-area-format
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(funcall battery-status-function))
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"Battery status not available")))
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;;;###autoload
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(define-minor-mode display-battery-mode
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"Toggle battery status display in mode line (Display Battery mode).
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With a prefix argument ARG, enable Display Battery mode if ARG is
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positive, and disable it otherwise. If called from Lisp, enable
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the mode if ARG is omitted or nil.
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The text displayed in the mode line is controlled by
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`battery-mode-line-format' and `battery-status-function'.
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The mode line is be updated every `battery-update-interval'
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seconds."
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:global t :group 'battery
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(setq battery-mode-line-string "")
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(or global-mode-string (setq global-mode-string '("")))
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(and battery-update-timer (cancel-timer battery-update-timer))
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(if (and battery-status-function battery-mode-line-format)
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(if (not display-battery-mode)
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(setq global-mode-string
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(delq 'battery-mode-line-string global-mode-string))
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(add-to-list 'global-mode-string 'battery-mode-line-string t)
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(setq battery-update-timer (run-at-time nil battery-update-interval
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'battery-update-handler))
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(battery-update))
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(message "Battery status not available")
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(setq display-battery-mode nil)))
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(defun battery-update-handler ()
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(battery-update)
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(sit-for 0))
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(defun battery-update ()
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"Update battery status information in the mode line."
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(let ((data (and battery-status-function (funcall battery-status-function))))
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(setq battery-mode-line-string
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(propertize (if (and battery-mode-line-format
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(<= (car (read-from-string (cdr (assq ?p data))))
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battery-mode-line-limit))
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(battery-format
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battery-mode-line-format
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data)
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"")
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'face
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(and (<= (car (read-from-string (cdr (assq ?p data))))
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battery-load-critical)
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'error)
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'help-echo "Battery status information")))
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(force-mode-line-update))
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;;; `/proc/apm' interface for Linux.
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(defconst battery-linux-proc-apm-regexp
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(concat "^\\([^ ]+\\)" ; Driver version.
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" \\([^ ]+\\)" ; APM BIOS version.
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" 0x\\([0-9a-f]+\\)" ; APM BIOS flags.
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" 0x\\([0-9a-f]+\\)" ; AC line status.
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" 0x\\([0-9a-f]+\\)" ; Battery status.
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" 0x\\([0-9a-f]+\\)" ; Battery flags.
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" \\(-?[0-9]+\\)%" ; Load percentage.
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" \\(-?[0-9]+\\)" ; Remaining time.
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" \\(.*\\)" ; Time unit.
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"$")
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"Regular expression matching contents of `/proc/apm'.")
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(defun battery-linux-proc-apm ()
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"Get APM status information from Linux (the kernel).
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This function works only with the new `/proc/apm' format introduced
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in Linux version 1.3.58.
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The following %-sequences are provided:
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%v Linux driver version
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%V APM BIOS version
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%I APM BIOS status (verbose)
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%L AC line status (verbose)
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%B Battery status (verbose)
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%b Battery status, empty means high, `-' means low,
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`!' means critical, and `+' means charging
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%p Battery load percentage
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%s Remaining time (to charge or discharge) in seconds
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%m Remaining time (to charge or discharge) in minutes
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%h Remaining time (to charge or discharge) in hours
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%t Remaining time (to charge or discharge) in the form `h:min'"
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(let (driver-version bios-version bios-interface line-status
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battery-status battery-status-symbol load-percentage
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seconds minutes hours remaining-time tem)
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(with-temp-buffer
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(ignore-errors (insert-file-contents "/proc/apm"))
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(when (re-search-forward battery-linux-proc-apm-regexp)
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(setq driver-version (match-string 1))
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(setq bios-version (match-string 2))
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(setq tem (string-to-number (match-string 3) 16))
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(if (not (logand tem 2))
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(setq bios-interface "not supported")
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(setq bios-interface "enabled")
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(cond ((logand tem 16) (setq bios-interface "disabled"))
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((logand tem 32) (setq bios-interface "disengaged")))
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(setq tem (string-to-number (match-string 4) 16))
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(cond ((= tem 0) (setq line-status "off-line"))
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((= tem 1) (setq line-status "on-line"))
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((= tem 2) (setq line-status "on backup")))
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(setq tem (string-to-number (match-string 6) 16))
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(if (= tem 255)
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(setq battery-status "N/A")
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(setq tem (string-to-number (match-string 5) 16))
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(cond ((= tem 0) (setq battery-status "high"
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battery-status-symbol ""))
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((= tem 1) (setq battery-status "low"
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battery-status-symbol "-"))
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((= tem 2) (setq battery-status "critical"
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battery-status-symbol "!"))
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((= tem 3) (setq battery-status "charging"
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battery-status-symbol "+")))
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(setq load-percentage (match-string 7))
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(setq seconds (string-to-number (match-string 8)))
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(and (string-equal (match-string 9) "min")
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(setq seconds (* 60 seconds)))
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(setq minutes (/ seconds 60)
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hours (/ seconds 3600))
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(setq remaining-time
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(format "%d:%02d" hours (- minutes (* 60 hours))))))))
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(list (cons ?v (or driver-version "N/A"))
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(cons ?V (or bios-version "N/A"))
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(cons ?I (or bios-interface "N/A"))
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(cons ?L (or line-status "N/A"))
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(cons ?B (or battery-status "N/A"))
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(cons ?b (or battery-status-symbol ""))
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(cons ?p (or load-percentage "N/A"))
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(cons ?s (or (and seconds (number-to-string seconds)) "N/A"))
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(cons ?m (or (and minutes (number-to-string minutes)) "N/A"))
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(cons ?h (or (and hours (number-to-string hours)) "N/A"))
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(cons ?t (or remaining-time "N/A")))))
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;;; `/proc/acpi/' interface for Linux.
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(defun battery-linux-proc-acpi ()
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"Get ACPI status information from Linux (the kernel).
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This function works only with the `/proc/acpi/' format introduced
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in Linux version 2.4.20 and 2.6.0.
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The following %-sequences are provided:
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%c Current capacity (mAh)
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%r Current rate
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%B Battery status (verbose)
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%b Battery status, empty means high, `-' means low,
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`!' means critical, and `+' means charging
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%d Temperature (in degrees Celsius)
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%L AC line status (verbose)
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%p Battery load percentage
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%m Remaining time (to charge or discharge) in minutes
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%h Remaining time (to charge or discharge) in hours
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%t Remaining time (to charge or discharge) in the form `h:min'"
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(let ((design-capacity 0)
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(last-full-capacity 0)
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full-capacity
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(warn 0)
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(low 0)
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capacity rate rate-type charging-state minutes hours)
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;; ACPI provides information about each battery present in the system in
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;; a separate subdirectory. We are going to merge the available
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;; information together since displaying for a variable amount of
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;; batteries seems overkill for format-strings.
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(with-temp-buffer
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(dolist (dir (ignore-errors (directory-files "/proc/acpi/battery/"
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t "\\`[^.]")))
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(erase-buffer)
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(ignore-errors (insert-file-contents (expand-file-name "state" dir)))
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(when (re-search-forward "present: +yes$" nil t)
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(and (re-search-forward "charging state: +\\(.*\\)$" nil t)
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(member charging-state '("unknown" "charged" nil))
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;; On most multi-battery systems, most of the time only one
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;; battery is "charging"/"discharging", the others are
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;; "unknown".
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(setq charging-state (match-string 1)))
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(when (re-search-forward "present rate: +\\([0-9]+\\) \\(m[AW]\\)$"
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nil t)
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(setq rate (+ (or rate 0) (string-to-number (match-string 1))))
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(when (> rate 0)
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(setq rate-type (or (and rate-type
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(if (string= rate-type (match-string 2))
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rate-type
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(error
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"Inconsistent rate types (%s vs. %s)"
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rate-type (match-string 2))))
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(match-string 2)))))
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(when (re-search-forward "remaining capacity: +\\([0-9]+\\) m[AW]h$"
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nil t)
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(setq capacity
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(+ (or capacity 0) (string-to-number (match-string 1))))))
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(goto-char (point-max))
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(ignore-errors (insert-file-contents (expand-file-name "info" dir)))
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(when (re-search-forward "present: +yes$" nil t)
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(when (re-search-forward "design capacity: +\\([0-9]+\\) m[AW]h$"
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nil t)
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(cl-incf design-capacity (string-to-number (match-string 1))))
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(when (re-search-forward "last full capacity: +\\([0-9]+\\) m[AW]h$"
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nil t)
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(cl-incf last-full-capacity (string-to-number (match-string 1))))
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(when (re-search-forward
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"design capacity warning: +\\([0-9]+\\) m[AW]h$" nil t)
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(cl-incf warn (string-to-number (match-string 1))))
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(when (re-search-forward "design capacity low: +\\([0-9]+\\) m[AW]h$"
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nil t)
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(cl-incf low (string-to-number (match-string 1)))))))
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(setq full-capacity (if (> last-full-capacity 0)
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last-full-capacity design-capacity))
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(and capacity rate
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(setq minutes (if (zerop rate) 0
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(floor (* (/ (float (if (string= charging-state
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"charging")
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(- full-capacity capacity)
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capacity))
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rate)
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60)))
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hours (/ minutes 60)))
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(list (cons ?c (or (and capacity (number-to-string capacity)) "N/A"))
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(cons ?L (or (battery-search-for-one-match-in-files
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(mapcar (lambda (e) (concat e "/state"))
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(ignore-errors
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(directory-files "/proc/acpi/ac_adapter/"
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t "\\`[^.]")))
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"state: +\\(.*\\)$" 1)
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"N/A"))
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(cons ?d (or (battery-search-for-one-match-in-files
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(mapcar (lambda (e) (concat e "/temperature"))
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(ignore-errors
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(directory-files "/proc/acpi/thermal_zone/"
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t "\\`[^.]")))
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"temperature: +\\([0-9]+\\) C$" 1)
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"N/A"))
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(cons ?r (or (and rate (concat (number-to-string rate) " "
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rate-type)) "N/A"))
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(cons ?B (or charging-state "N/A"))
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(cons ?b (or (and (string= charging-state "charging") "+")
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(and capacity (< capacity low) "!")
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(and capacity (< capacity warn) "-")
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""))
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(cons ?h (or (and hours (number-to-string hours)) "N/A"))
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(cons ?m (or (and minutes (number-to-string minutes)) "N/A"))
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(cons ?t (or (and minutes
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(format "%d:%02d" hours (- minutes (* 60 hours))))
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"N/A"))
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(cons ?p (or (and full-capacity capacity
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(> full-capacity 0)
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(number-to-string
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(floor (/ capacity
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(/ (float full-capacity) 100)))))
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"N/A")))))
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;;; `/sys/class/power_supply/BATN' interface for Linux.
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(defun battery-linux-sysfs ()
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"Get ACPI status information from Linux kernel.
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This function works only with the new `/sys/class/power_supply/'
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format introduced in Linux version 2.4.25.
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The following %-sequences are provided:
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%c Current capacity (mAh or mWh)
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%r Current rate
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%B Battery status (verbose)
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%d Temperature (in degrees Celsius)
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%p Battery load percentage
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%L AC line status (verbose)
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%m Remaining time (to charge or discharge) in minutes
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%h Remaining time (to charge or discharge) in hours
|
||
%t Remaining time (to charge or discharge) in the form `h:min'"
|
||
(let (charging-state rate temperature hours
|
||
(charge-full 0.0)
|
||
(charge-now 0.0)
|
||
(energy-full 0.0)
|
||
(energy-now 0.0))
|
||
;; 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 (ignore-errors
|
||
(directory-files
|
||
"/sys/class/power_supply/" t
|
||
battery--linux-sysfs-regexp)))
|
||
(erase-buffer)
|
||
(ignore-errors (insert-file-contents
|
||
(expand-file-name "uevent" dir)))
|
||
(when (re-search-forward "POWER_SUPPLY_PRESENT=1$" nil t)
|
||
(goto-char (point-min))
|
||
(and (re-search-forward "POWER_SUPPLY_STATUS=\\(.*\\)$" nil t)
|
||
(member charging-state '("Unknown" "Full" nil))
|
||
(setq charging-state (match-string 1)))
|
||
(when (re-search-forward
|
||
"POWER_SUPPLY_\\(CURRENT\\|POWER\\)_NOW=\\([0-9]*\\)$"
|
||
nil t)
|
||
(setq rate (float (string-to-number (match-string 2)))))
|
||
(when (re-search-forward "POWER_SUPPLY_TEMP=\\([0-9]*\\)$" nil t)
|
||
(setq temperature (match-string 1)))
|
||
(let (full-string now-string)
|
||
;; Sysfs may list either charge (mAh) or energy (mWh).
|
||
;; Keep track of both, and choose which to report later.
|
||
(cond ((and (re-search-forward
|
||
"POWER_SUPPLY_CHARGE_FULL=\\([0-9]*\\)$" nil t)
|
||
(setq full-string (match-string 1))
|
||
(re-search-forward
|
||
"POWER_SUPPLY_CHARGE_NOW=\\([0-9]*\\)$" nil t)
|
||
(setq now-string (match-string 1)))
|
||
(setq charge-full (+ charge-full
|
||
(string-to-number full-string))
|
||
charge-now (+ charge-now
|
||
(string-to-number now-string))))
|
||
((and (re-search-forward
|
||
"POWER_SUPPLY_ENERGY_FULL=\\([0-9]*\\)$" nil t)
|
||
(setq full-string (match-string 1))
|
||
(re-search-forward
|
||
"POWER_SUPPLY_ENERGY_NOW=\\([0-9]*\\)$" nil t)
|
||
(setq now-string (match-string 1)))
|
||
(setq energy-full (+ energy-full
|
||
(string-to-number full-string))
|
||
energy-now (+ energy-now
|
||
(string-to-number now-string))))))
|
||
(goto-char (point-min))
|
||
(when (and energy-now rate (not (zerop rate))
|
||
(re-search-forward
|
||
"POWER_SUPPLY_VOLTAGE_NOW=\\([0-9]*\\)$" nil t))
|
||
(let ((remaining (if (string= charging-state "Discharging")
|
||
energy-now
|
||
(- energy-full energy-now))))
|
||
(setq hours (/ (/ (* remaining (string-to-number
|
||
(match-string 1)))
|
||
rate)
|
||
10000000.0)))))))
|
||
(list (cons ?c (cond ((or (> charge-full 0) (> charge-now 0))
|
||
(number-to-string charge-now))
|
||
((or (> energy-full 0) (> energy-now 0))
|
||
(number-to-string energy-now))
|
||
(t "N/A")))
|
||
(cons ?r (if rate (format "%.1f" (/ rate 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 ?p (cond ((and (> charge-full 0) (> charge-now 0))
|
||
(format "%.1f"
|
||
(/ (* 100 charge-now) charge-full)))
|
||
((> energy-full 0)
|
||
(format "%.1f"
|
||
(/ (* 100 energy-now) energy-full)))
|
||
(t "N/A")))
|
||
(cons ?L (if (file-readable-p "/sys/class/power_supply/AC/online")
|
||
(if (battery-search-for-one-match-in-files
|
||
(list "/sys/class/power_supply/AC/online"
|
||
"/sys/class/power_supply/ACAD/online")
|
||
"1" 0)
|
||
"AC"
|
||
"BAT")
|
||
"N/A")))))
|
||
|
||
|
||
;;; `apm' interface for BSD.
|
||
(defun battery-bsd-apm ()
|
||
"Get APM status information from BSD apm binary.
|
||
The following %-sequences are provided:
|
||
%L AC line status (verbose)
|
||
%B Battery status (verbose)
|
||
%b Battery status, empty means high, `-' means low,
|
||
`!' means critical, and `+' means charging
|
||
%P Advanced power saving mode state (verbose)
|
||
%p Battery charge percentage
|
||
%s Remaining battery charge time in seconds
|
||
%m Remaining battery charge time in minutes
|
||
%h Remaining battery charge time in hours
|
||
%t Remaining battery charge time in the form `h:min'"
|
||
(let* ((os-name (car (split-string
|
||
(shell-command-to-string "/usr/bin/uname"))))
|
||
(apm-flag (if (equal os-name "OpenBSD") "P" "s"))
|
||
(apm-cmd (concat "/usr/sbin/apm -ablm" apm-flag))
|
||
(apm-output (split-string (shell-command-to-string apm-cmd)))
|
||
;; Battery status
|
||
(battery-status
|
||
(let ((stat (string-to-number (nth 0 apm-output))))
|
||
(cond ((eq stat 0) '("high" . ""))
|
||
((eq stat 1) '("low" . "-"))
|
||
((eq stat 2) '("critical" . "!"))
|
||
((eq stat 3) '("charging" . "+"))
|
||
((eq stat 4) '("absent" . nil)))))
|
||
;; Battery percentage
|
||
(battery-percentage (nth 1 apm-output))
|
||
;; Battery life
|
||
(battery-life (nth 2 apm-output))
|
||
;; AC status
|
||
(line-status
|
||
(let ((ac (string-to-number (nth 3 apm-output))))
|
||
(cond ((eq ac 0) "disconnected")
|
||
((eq ac 1) "connected")
|
||
((eq ac 2) "backup power"))))
|
||
;; Advanced power savings mode
|
||
(apm-mode
|
||
(let ((apm (string-to-number (nth 4 apm-output))))
|
||
(if (string= os-name "OpenBSD")
|
||
(cond ((eq apm 0) "manual")
|
||
((eq apm 1) "automatic")
|
||
((eq apm 2) "cool running"))
|
||
(if (eq 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 hours)))))
|
||
(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 (or (and seconds (number-to-string seconds)) "N/A"))
|
||
(cons ?m (or (and minutes (number-to-string minutes)) "N/A"))
|
||
(cons ?h (or (and hours (number-to-string hours)) "N/A"))
|
||
(cons ?t (or remaining-time "N/A")))))
|
||
|
||
|
||
;;; `pmset' interface for Darwin (OS X).
|
||
|
||
(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
|
||
%h Remaining time in hours
|
||
%m Remaining time in minutes
|
||
%t Remaining time 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 "\\(?:Currentl?y\\|Now\\) drawing from '\\(AC\\|Battery\\) Power'" nil t)
|
||
(setq power-source (match-string 1))
|
||
(when (re-search-forward "^ -InternalBattery-0[ \t]+" nil t)
|
||
(when (looking-at "\\([0-9]\\{1,3\\}\\)%")
|
||
(setq load-percentage (match-string 1))
|
||
(goto-char (match-end 0))
|
||
(cond ((looking-at "; charging")
|
||
(setq battery-status "charging"
|
||
battery-status-symbol "+"))
|
||
((< (string-to-number load-percentage) battery-load-low)
|
||
(setq battery-status "low"
|
||
battery-status-symbol "-"))
|
||
((< (string-to-number load-percentage) battery-load-critical)
|
||
(setq battery-status "critical"
|
||
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."
|
||
(replace-regexp-in-string
|
||
"%."
|
||
(lambda (str)
|
||
(let ((char (aref str 1)))
|
||
(if (eq char ?%) "%"
|
||
(or (cdr (assoc char alist)) ""))))
|
||
format t t))
|
||
|
||
(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
|