Merge pull request #12 from Freed-Wu/fix_acpi

Add full support for acpi

autoload/battery/backend/linux.vim

@@ -1,15 +1,15 @@
 " Ref: https://github.com/lambdalisue/battery.vim/issues/7
-let s:Job = vital#battery#import('System.Job')
-let s:ac_online = get(glob('/sys/class/power_supply/AC*/online', 0, 1), 0, '')
-let s:bat_capacity = get(glob('/sys/class/power_supply/BAT*/capacity', 0, 1), 0, '')
+let s:bat_dirs = '/sys/class/power_supply/{CMD*,BAT*,battery}'
+let s:bat_status = get(glob(s:bat_dirs . '/status', 0, 1), 0, '')
+let s:bat_capacity = get(glob(s:bat_dirs . '/capacity', 0, 1), 0, '')
 
 function! s:read(path) abort
   let body = readfile(a:path)
   return get(body, 0, '')
 endfunction
 
 function! s:linux_update() abort dict
-  let self.is_charging = s:read(s:ac_online) ==# '1'
+  let self.is_charging = s:read(s:bat_status) !=# 'Discharging'
   let self.value = s:read(s:bat_capacity) + 0
 endfunction
 
@@ -22,5 +22,5 @@ function! battery#backend#linux#define() abort
 endfunction
 
 function! battery#backend#linux#is_available() abort
-  return !empty(s:ac_online) && !empty(s:bat_capacity)
+  return !empty(s:bat_status) && !empty(s:bat_capacity)
 endfunction