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
|
{-# LANGUAGE FlexibleContexts, CPP #-}
------------------------------------------------------------------------------
-- |
-- Module: Xmobar.Config.Parse
-- Copyright: (c) 2018, 2020 Jose Antonio Ortega Ruiz
-- License: BSD3-style (see LICENSE)
--
-- Maintainer: jao@gnu.org
-- Stability: unstable
-- Portability: portable
-- Created: Sun Nov 25, 2018 23:56
--
--
-- Parsing of configuration files
--
------------------------------------------------------------------------------
module Xmobar.Config.Parse(readConfig, parseConfig) where
import Text.ParserCombinators.Parsec
import Text.ParserCombinators.Parsec.Number (int)
import Text.ParserCombinators.Parsec.Perm ((<|?>), (<$?>), permute)
import Control.Monad.IO.Class (liftIO)
import Data.Functor ((<&>))
import Xmobar.Config.Types
#if defined XFT || defined UTF8
import qualified System.IO as S (readFile)
#endif
readFileSafe :: FilePath -> IO String
#if defined XFT || defined UTF8
readFileSafe = S.readFile
#else
readFileSafe = readFile
#endif
stripComments :: String -> String
stripComments =
unlines . map (drop 5 . strip False . (replicate 5 ' '++)) . lines
where strip m ('-':'-':xs) = if m then "--" ++ strip m xs else ""
strip m ('"':xs) = '"': strip (not m) xs
strip m (x:xs) = x : strip m xs
strip _ [] = []
-- | Parse the config, logging a list of fields that were missing and replaced
-- by the default definition.
parseConfig :: Config -> String -> Either ParseError (Config,[String])
parseConfig defaultConfig =
runParser parseConf fields "Config" . stripComments
where
parseConf = do
many space
sepEndSpc ["Config","{"]
x <- perms
eof
s <- getState
let sig = signal defaultConfig
return (x sig ,s)
perms = permute $ Config
<$?> pFont <|?> pFontList <|?> pWmClass <|?> pWmName
<|?> pBgColor <|?> pFgColor
<|?> pPosition <|?> pTextOffset <|?> pTextOffsets
<|?> pIconOffset <|?> pBorder
<|?> pBdColor <|?> pBdWidth <|?> pAlpha <|?> pHideOnStart
<|?> pAllDesktops <|?> pOverrideRedirect <|?> pPickBroadest
<|?> pLowerOnStart <|?> pPersistent <|?> pIconRoot
<|?> pCommands <|?> pSepChar <|?> pAlignSep <|?> pTemplate
<|?> pVerbose
fields = [ "font", "additionalFonts","bgColor", "fgColor"
, "wmClass", "wmName", "sepChar"
, "alignSep" , "border", "borderColor" ,"template"
, "position" , "textOffset", "textOffsets", "iconOffset"
, "allDesktops", "overrideRedirect", "pickBroadest"
, "hideOnStart", "lowerOnStart", "persistent", "iconRoot"
, "alpha", "commands", "verbose"
]
pFont = strField font "font"
pFontList = strListField additionalFonts "additionalFonts"
pWmClass = strField wmClass "wmClass"
pWmName = strField wmName "wmName"
pBgColor = strField bgColor "bgColor"
pFgColor = strField fgColor "fgColor"
pBdColor = strField borderColor "borderColor"
pSepChar = strField sepChar "sepChar"
pAlignSep = strField alignSep "alignSep"
pTemplate = strField template "template"
pTextOffset = readField textOffset "textOffset"
pTextOffsets = readIntList textOffsets "textOffsets"
pIconOffset = readField iconOffset "iconOffset"
pPosition = readField position "position"
pHideOnStart = readField hideOnStart "hideOnStart"
pLowerOnStart = readField lowerOnStart "lowerOnStart"
pPersistent = readField persistent "persistent"
pBorder = readField border "border"
pBdWidth = readField borderWidth "borderWidth"
pAllDesktops = readField allDesktops "allDesktops"
pOverrideRedirect = readField overrideRedirect "overrideRedirect"
pPickBroadest = readField pickBroadest "pickBroadest"
pIconRoot = readField iconRoot "iconRoot"
pAlpha = readField alpha "alpha"
pVerbose = readField verbose "verbose"
pCommands = field commands "commands" readCommands
staticPos = do string "Static"
wrapSkip (string "{")
p <- many (noneOf "}")
wrapSkip (string "}")
string ","
return ("Static {" ++ p ++ "}")
tillFieldEnd = staticPos <|> many (noneOf ",}\n\r")
commandsEnd = wrapSkip (string "]") >> (string "}" <|> notNextRun)
notNextRun = do {string ","
; notFollowedBy $ wrapSkip $ string "Run"
; return ","
}
readCommands = manyTill anyChar (try commandsEnd) >>=
read' commandsErr . flip (++) "]"
strField e n = field e n strMulti
strMulti = scan '"'
where
scan lead = do
spaces
char lead
s <- manyTill anyChar (rowCont <|> unescQuote)
(char '"' >> return s) <|> fmap (s ++) (scan '\\')
rowCont = try $ char '\\' >> string "\n"
unescQuote = lookAhead (noneOf "\\") >> lookAhead (string "\"")
strListField e n = field e n strList
strList = do
spaces
char '['
list <- sepBy (strMulti >>= \x -> spaces >> return x) (char ',')
spaces
char ']'
return list
wrapSkip x = many space >> x >>= \r -> many space >> return r
sepEndSpc = mapM_ (wrapSkip . try . string)
fieldEnd = many $ space <|> oneOf ",}"
field e n c = (,) (e defaultConfig) $
updateState (filter (/= n)) >> sepEndSpc [n,"="] >>
wrapSkip c >>= \r -> fieldEnd >> return r
readField a n = field a n $ tillFieldEnd >>= read' n
readIntList d n = field d n intList
intList = do
spaces
char '['
list <- sepBy (spaces >> int >>= \x-> spaces >> return x) (char ',')
spaces
char ']'
return list
read' d s = case reads s of
[(x, _)] -> return x
_ -> fail $ "error reading the " ++ d ++ " field: " ++ s
commandsErr :: String
commandsErr = "commands: this usually means that a command could not" ++
"\nbe parsed." ++
"\nThe error could be located at the begining of the command" ++
"\nwhich follows the offending one."
-- | Reads the configuration from a file or an error if it cannot be
-- parsed.
readConfig :: Config -> FilePath -> IO (Either ParseError (Config,[String]))
readConfig defaultConfig f =
liftIO (readFileSafe f) <&> parseConfig defaultConfig
|
