summaryrefslogtreecommitdiffhomepage
path: root/app/Main.hs
blob: 0760d161285e56cc4645a8a4bc1b39f2322a8fc6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
{-# LANGUAGE FlexibleContexts #-}
-----------------------------------------------------------------------------
-- |
-- Module      :  Xmobar.Main
-- Copyright   :  (c) Andrea Rossato
-- License     :  BSD-style (see LICENSE)
--
-- Maintainer  :  Jose A. Ortega Ruiz <jao@gnu.org>
-- Stability   :  unstable
-- Portability :  unportable
--
-- The main module of Xmobar, a text based status bar
--
-----------------------------------------------------------------------------

module Main (main) where

import Data.List (intercalate)

import Data.Version (showVersion)
import System.Console.GetOpt
import System.Exit
import System.Environment (getArgs)
import Control.Monad (unless)
import Text.Read (readMaybe)

import Xmobar (xmobar)
import Xmobar.Config

import Paths_xmobar (version)
import Configuration (readConfig, readDefaultConfig)

-- $main

-- | The main entry point
main :: IO ()
main = do
  (o,file) <- getArgs >>= getOpts
  (c,defaultings) <- case file of
                       [cfgfile] -> readConfig cfgfile usage
                       _ -> readDefaultConfig usage
  unless (null defaultings) $ putStrLn $
    "Fields missing from config defaulted: " ++ intercalate "," defaultings
  doOpts c o >>= xmobar

data Opts = Help
          | Version
          | Font       String
          | BgColor    String
          | FgColor    String
          | Alpha      String
          | T
          | B
          | D
          | AlignSep   String
          | Commands   String
          | AddCommand String
          | SepChar    String
          | Template   String
          | OnScr      String
          | IconRoot   String
          | Position   String
          | WmClass    String
          | WmName     String
       deriving Show

options :: [OptDescr Opts]
options =
    [ Option "h?" ["help"] (NoArg Help) "This help"
    , Option "V" ["version"] (NoArg Version) "Show version information"
    , Option "f" ["font"] (ReqArg Font "font name") "The font name"
    , Option "w" ["wmclass"] (ReqArg WmClass "class") "X11 WM_CLASS property"
    , Option "n" ["wmname"] (ReqArg WmName "name") "X11 WM_NAME property"
    , Option "B" ["bgcolor"] (ReqArg BgColor "bg color" )
      "The background color. Default black"
    , Option "F" ["fgcolor"] (ReqArg FgColor "fg color")
      "The foreground color. Default grey"
    , Option "i" ["iconroot"] (ReqArg IconRoot "path")
      "Root directory for icon pattern paths. Default '.'"
    , Option "A" ["alpha"] (ReqArg Alpha "alpha")
      "The transparency: 0 is transparent, 255 is opaque. Default: 255"
    , Option "o" ["top"] (NoArg T) "Place xmobar at the top of the screen"
    , Option "b" ["bottom"] (NoArg B)
      "Place xmobar at the bottom of the screen"
    , Option "d" ["dock"] (NoArg D)
      "Don't override redirect from WM and function as a dock"
    , Option "a" ["alignsep"] (ReqArg AlignSep "alignsep")
      "Separators for left, center and right text\nalignment. Default: '}{'"
    , Option "s" ["sepchar"] (ReqArg SepChar "char")
      ("The character used to separate commands in" ++
       "\nthe output template. Default '%'")
    , Option "t" ["template"] (ReqArg Template "template")
      "The output template"
    , Option "c" ["commands"] (ReqArg Commands "commands")
      "The list of commands to be executed"
    , Option "C" ["add-command"] (ReqArg AddCommand "command")
      "Add to the list of commands to be executed"
    , Option "x" ["screen"] (ReqArg OnScr "screen")
      "On which X screen number to start"
    , Option "p" ["position"] (ReqArg Position "position")
      "Specify position of xmobar. Same syntax as in config file"
    ]

getOpts :: [String] -> IO ([Opts], [String])
getOpts argv =
    case getOpt Permute options argv of
      (o,n,[])   -> return (o,n)
      (_,_,errs) -> error (concat errs ++ usage)

usage :: String
usage = usageInfo header options ++ footer
    where header = "Usage: xmobar [OPTION...] [FILE]\nOptions:"
          footer = "\nMail bug reports and suggestions to " ++ mail ++ "\n"

info :: String
info = "xmobar " ++ showVersion version
        ++ "\n (C) 2007 - 2010 Andrea Rossato "
        ++ "\n (C) 2010 - 2018 Jose A Ortega Ruiz\n "
        ++ mail ++ "\n" ++ license

mail :: String
mail = "<mail@jao.io>"

license :: String
license = "\nThis program is distributed in the hope that it will be useful," ++
          "\nbut WITHOUT ANY WARRANTY; without even the implied warranty of" ++
          "\nMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." ++
          "\nSee the License for more details."

doOpts :: Config -> [Opts] -> IO Config
doOpts conf [] =
  return (conf {lowerOnStart = lowerOnStart conf && overrideRedirect conf})
doOpts conf (o:oo) =
  case o of
    Help -> putStr   usage >> exitSuccess
    Version -> putStrLn info  >> exitSuccess
    Font s -> doOpts' (conf {font = s})
    WmClass s -> doOpts' (conf {wmClass = s})
    WmName s -> doOpts' (conf {wmName = s})
    BgColor s -> doOpts' (conf {bgColor = s})
    FgColor s -> doOpts' (conf {fgColor = s})
    Alpha n -> doOpts' (conf {alpha = read n})
    T -> doOpts' (conf {position = Top})
    B -> doOpts' (conf {position = Bottom})
    D -> doOpts' (conf {overrideRedirect = False})
    AlignSep s -> doOpts' (conf {alignSep = s})
    SepChar s -> doOpts' (conf {sepChar = s})
    Template s -> doOpts' (conf {template = s})
    IconRoot s -> doOpts' (conf {iconRoot = s})
    OnScr n -> doOpts' (conf {position = OnScreen (read n) $ position conf})
    Commands s -> case readCom 'c' s of
                    Right x -> doOpts' (conf {commands = x})
                    Left e -> putStr (e ++ usage) >> exitWith (ExitFailure 1)
    AddCommand s -> case readCom 'C' s of
                      Right x -> doOpts' (conf {commands = commands conf ++ x})
                      Left e -> putStr (e ++ usage) >> exitWith (ExitFailure 1)
    Position s -> readPosition s
  where readCom c str =
          case readStr str of
            [x] -> Right x
            _  -> Left ("xmobar: cannot read list of commands " ++
                        "specified with the -" ++ c:" option\n")
        readStr str = [x | (x,t) <- reads str, ("","") <- lex t]
        doOpts' opts = doOpts opts oo
        readPosition string =
            case readMaybe string of
                Just x  -> doOpts' (conf { position = x })
                Nothing -> do
                    putStrLn "Can't parse position option, ignoring"
                    doOpts' conf