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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
{-# 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 Stuff
-- $main
main
, readConfig
, readDefaultConfig
) where
import Xmobar
import Parsers
import Config
import XUtil
import Data.List (intercalate)
import qualified Data.Map as Map
import Paths_xmobar (version)
import Data.Version (showVersion)
import Graphics.X11.Xlib
import System.Console.GetOpt
import System.Exit
import System.Environment
import System.Posix.Files
import Control.Monad (unless)
import Signal (setupSignalHandler)
-- $main
-- | The main entry point
main :: IO ()
main = do
initThreads
d <- openDisplay ""
args <- getArgs
(o,file) <- getOpts args
(c,defaultings) <- case file of
[cfgfile] -> readConfig cfgfile
_ -> readDefaultConfig
unless (null defaultings) $ putStrLn $
"Fields missing from config defaulted: " ++ intercalate "," defaultings
conf <- doOpts c o
fs <- initFont d (font conf)
cls <- mapM (parseTemplate conf) (splitTemplate conf)
sig <- setupSignalHandler
vars <- mapM (mapM $ startCommand sig) cls
(r,w) <- createWin d fs conf
let ic = Map.empty
startLoop (XConf d r w fs ic conf) sig vars
-- | Splits the template in its parts
splitTemplate :: Config -> [String]
splitTemplate conf =
case break (==l) t of
(le,_:re) -> case break (==r) re of
(ce,_:ri) -> [le, ce, ri]
_ -> def
_ -> def
where [l, r] = alignSep
(if length (alignSep conf) == 2 then conf else defaultConfig)
t = template conf
def = [t, "", ""]
-- | Reads the configuration files or quits with an error
readConfig :: FilePath -> IO (Config,[String])
readConfig f = do
file <- io $ fileExist f
s <- io $ if file then readFileSafe f else error $
f ++ ": file not found!\n" ++ usage
either (\err -> error $ f ++
": configuration file contains errors at:\n" ++ show err)
return $ parseConfig s
-- | Read default configuration file or load the default config
readDefaultConfig :: IO (Config,[String])
readDefaultConfig = do
home <- io $ getEnv "HOME"
let path = home ++ "/.xmobarrc"
f <- io $ fileExist path
if f then readConfig path else return (defaultConfig,[])
data Opts = Help
| Version
| Font String
| BgColor String
| FgColor String
| T
| B
| AlignSep String
| Commands String
| AddCommand String
| SepChar String
| Template String
| OnScr 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 "B" ["bgcolor"] (ReqArg BgColor "bg color" )
"The background color. Default black"
, Option "F" ["fgcolor"] (ReqArg FgColor "fg color")
"The foreground color. Default grey"
, 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 "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"
]
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 - 2013 Jose A Ortega Ruiz\n "
++ mail ++ "\n" ++ license
mail :: String
mail = "<xmobar@projects.haskell.org>"
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
doOpts conf (o:oo) =
case o of
Help -> putStr usage >> exitSuccess
Version -> putStrLn info >> exitSuccess
Font s -> doOpts' (conf {font = s})
BgColor s -> doOpts' (conf {bgColor = s})
FgColor s -> doOpts' (conf {fgColor = s})
T -> doOpts' (conf {position = Top})
B -> doOpts' (conf {position = Bottom})
AlignSep s -> doOpts' (conf {alignSep = s})
SepChar s -> doOpts' (conf {sepChar = s})
Template s -> doOpts' (conf {template = 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)
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
|
