-;;; battery.el --- display battery status information.
+;;; battery.el --- display battery status information
-;; Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+;; Copyright (C) 1997, 1998, 2000, 2001 Free Software Foundation, Inc.
-;; Author: Ralph Schleicher <rs@purple.UL.BaWue.DE>
+;; Author: Ralph Schleicher <rs@nunatak.allgaeu.org>
;; Keywords: hardware
;; This file is part of GNU Emacs.
;; There is at present only a function interpreting the new `/proc/apm'
;; file format of Linux version 1.3.58 or newer. That is, what a lucky
-;; coincidence, exactly the interface provided by the author's labtop.
+;; coincidence, exactly the interface provided by the author's laptop.
;;; Code:
(defcustom battery-status-function
(cond ((and (eq system-type 'gnu/linux)
(file-readable-p "/proc/apm"))
- 'battery-linux-proc-apm))
+ 'battery-linux-proc-apm))
"*Function for getting battery status information.
-The function have to return an alist of conversion definitions.
-Cons cells are of the form
+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."
- :type 'function
+ :type '(choice (const nil) function)
:group 'battery)
(defcustom battery-echo-area-format
;;;###autoload
(defun battery ()
"Display battery status information in the echo area.
-The text beeing displayed in the echo area is controlled by the variables
+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)
;;;###autoload
(defun display-battery ()
"Display battery status information in the mode line.
-The text beeing displayed in the mode line is controlled by the variables
+The text being displayed in the mode line is controlled by the variables
`battery-mode-line-format' and `battery-status-function'.
The mode line will be updated automatically every `battery-update-interval'
seconds."
(interactive)
(setq battery-mode-line-string "")
(or global-mode-string (setq global-mode-string '("")))
- (or (memq 'battery-mode-line-string global-mode-string)
- (setq global-mode-string (append global-mode-string
- '(battery-mode-line-string))))
+ (add-to-list 'global-mode-string 'battery-mode-line-string t)
(and battery-update-timer (cancel-timer battery-update-timer))
(setq battery-update-timer (run-at-time nil battery-update-interval
'battery-update-handler))
(defun battery-update ()
"Update battery status information in the mode line."
- (setq battery-mode-line-string (if (and battery-mode-line-format
- battery-status-function)
- (battery-format
- battery-mode-line-format
- (funcall battery-status-function))
- ""))
+ (setq battery-mode-line-string (propertize (if (and battery-mode-line-format
+ battery-status-function)
+ (battery-format
+ battery-mode-line-format
+ (funcall battery-status-function))
+ "")
+ 'help-echo "Battery status information"))
(force-mode-line-update))
\f
(setq buffer (get-buffer-create " *battery*"))
(set-buffer buffer)
(erase-buffer)
- (battery-insert-file-contents "/proc/apm")
+ (insert-file-contents "/proc/apm")
(re-search-forward battery-linux-proc-apm-regexp)
(setq driver-version (match-string 1))
(setq bios-version (match-string 2))
(setq result (concat result "%")))
result))
-(defun battery-insert-file-contents (file-name)
- "Insert contents of file FILE-NAME after point.
-FILE-NAME can be a non-ordinary file, for example, a named pipe.
-Return t if file exists."
- (let ((load-read-function 'battery-read-function)
- (load-source-file-function nil)
- (load-path '("."))
- (load-history nil))
- (save-excursion
- (load file-name nil t t))))
-
-(defun battery-read-function (&optional stream)
- "Function for reading expressions from STREAM.
-Value is always nil."
- (let (char)
- (while (not (< (setq char (get-file-char)) 0))
- (insert char))))
-
(defconst battery-hex-map '((?0 . 0) (?1 . 1) (?2 . 2) (?3 . 3)
(?4 . 4) (?5 . 5) (?6 . 6) (?7 . 7)
(?8 . 8) (?9 . 9) (?a . 10) (?b . 11)