scheme interaction mode

[bpt/emacs.git] / lisp / battery.el

diff --git a/lisp/battery.el b/lisp/battery.el
index 1eef80a..b493634 100644 (file)
--- a/lisp/battery.el
+++ b/lisp/battery.el
@@ -201,19 +201,18 @@ seconds."
 
 (defun battery-update ()
   "Update battery status information in the mode line."
-  (let ((data (and battery-status-function (funcall battery-status-function))))
+  (let* ((data (and battery-status-function (funcall battery-status-function)))
+         (percentage (car (read-from-string (cdr (assq ?p data))))))
     (setq battery-mode-line-string
          (propertize (if (and battery-mode-line-format
-                              (<= (car (read-from-string (cdr (assq ?p data))))
-                                  battery-mode-line-limit))
-                         (battery-format
-                          battery-mode-line-format
-                          data)
+                              (numberp percentage)
+                               (<= percentage battery-mode-line-limit))
+                         (battery-format battery-mode-line-format data)
                        "")
                      'face
-                     (and (<= (car (read-from-string (cdr (assq ?p data))))
-                                  battery-load-critical)
-                          'error)
+                      (and (numberp percentage)
+                           (<= percentage battery-load-critical)
+                           'error)
                      'help-echo "Battery status information")))
   (force-mode-line-update))
 \f