-----------------------------------------------------------------------------
-- |
-- Module      :  Plugins.Monitors.CpuFreq
-- Copyright   :  (c) Juraj Hercek
-- License     :  BSD-style (see LICENSE)
--
-- Maintainer  :  Juraj Hercek <juhe_haskell@hck.sk>
-- Stability   :  unstable
-- Portability :  unportable
--
-- A cpu frequency monitor for Xmobar
--
-----------------------------------------------------------------------------

module Xmobar.Plugins.Monitors.CpuFreq where

import Xmobar.Plugins.Monitors.Common

-- |
-- Cpu frequency default configuration. Default template contains only
-- one core frequency, user should specify custom template in order to
-- get more cpu frequencies.
cpuFreqConfig :: IO MConfig
cpuFreqConfig :: IO MConfig
cpuFreqConfig =
  String -> [String] -> IO MConfig
mkMConfig String
"Freq: <cpu0>" ((Int -> String) -> [Int] -> [String]
forall a b. (a -> b) -> [a] -> [b]
map (String -> String -> String
forall a. [a] -> [a] -> [a]
(++) String
"cpu" (String -> String) -> (Int -> String) -> Int -> String
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Int -> String
forall a. Show a => a -> String
show) [Int
0 :: Int ..])


-- |
-- Function retrieves monitor string holding the cpu frequency (or
-- frequencies)
runCpuFreq :: [String] -> Monitor String
runCpuFreq :: [String] -> Monitor String
runCpuFreq [String]
_ = do
  Bool
suffix <- Selector Bool -> Monitor Bool
forall a. Selector a -> Monitor a
getConfigValue Selector Bool
useSuffix
  Int
ddigits <- Selector Int -> Monitor Int
forall a. Selector a -> Monitor a
getConfigValue Selector Int
decDigits
  let path :: [String]
path = [String
"/sys/devices/system/cpu/cpu", String
"/cpufreq/scaling_cur_freq"]
      divisor :: Double
divisor = Double
1e6 :: Double
      fmt :: Double -> String
fmt Double
x | Double
x Double -> Double -> Bool
forall a. Ord a => a -> a -> Bool
< Double
1 = if Bool
suffix then Double -> String
forall a. RealFrac a => a -> String
mhzFmt Double
x String -> String -> String
forall a. [a] -> [a] -> [a]
++ String
"MHz"
                                else Double -> String
ghzFmt Double
x
            | Bool
otherwise = Double -> String
ghzFmt Double
x String -> String -> String
forall a. [a] -> [a] -> [a]
++ if Bool
suffix then String
"GHz" else String
""
      mhzFmt :: a -> String
mhzFmt a
x = Integer -> String
forall a. Show a => a -> String
show (a -> Integer
forall a b. (RealFrac a, Integral b) => a -> b
round (a
x a -> a -> a
forall a. Num a => a -> a -> a
* a
1000) :: Integer)
      ghzFmt :: Double -> String
ghzFmt = Int -> Double -> String
forall a. RealFloat a => Int -> a -> String
showDigits Int
ddigits
  String
failureMessage <- Selector String -> Monitor String
forall a. Selector a -> Monitor a
getConfigValue Selector String
naString
  String
-> [[String]]
-> Maybe (String, String -> Int)
-> (Double -> Double)
-> (Double -> String)
-> Monitor String
forall a.
(Ord a, Num a) =>
String
-> [[String]]
-> Maybe (String, String -> Int)
-> (Double -> a)
-> (a -> String)
-> Monitor String
checkedDataRetrieval String
failureMessage [[String]
path] Maybe (String, String -> Int)
forall a. Maybe a
Nothing (Double -> Double -> Double
forall a. Fractional a => a -> a -> a
/Double
divisor) Double -> String
fmt