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
|
------------------------------------------------------------------------------
-- |
-- Module: Xmobar.Plugins.Monitors.Parsers
-- Copyright: (c) 2018 Jose Antonio Ortega Ruiz
-- License: BSD3-style (see LICENSE)
--
-- Maintainer: jao@gnu.org
-- Stability: unstable
-- Portability: portable
-- Created: Sun Dec 02, 2018 04:49
--
--
-- Parsing template strings
--
------------------------------------------------------------------------------
module Xmobar.Plugins.Monitors.Common.Parsers ( runP
, skipRestOfLine
, getNumbers
, getNumbersAsString
, getAllBut
, getAfterString
, skipTillString
, parseTemplate
, parseTemplate'
) where
import Xmobar.Plugins.Monitors.Common.Types
import Control.Applicative ((<$>))
import qualified Data.Map as Map
import Text.ParserCombinators.Parsec
runP :: Parser [a] -> String -> IO [a]
runP p i =
case parse p "" i of
Left _ -> return []
Right x -> return x
getAllBut :: String -> Parser String
getAllBut s =
manyTill (noneOf s) (char $ head s)
getNumbers :: Parser Float
getNumbers = skipMany space >> many1 digit >>= \n -> return $ read n
getNumbersAsString :: Parser String
getNumbersAsString = skipMany space >> many1 digit >>= \n -> return n
skipRestOfLine :: Parser Char
skipRestOfLine =
do many $ noneOf "\n\r"
newline
getAfterString :: String -> Parser String
getAfterString s =
do { try $ manyTill skipRestOfLine $ string s
; manyTill anyChar newline
} <|> return ""
skipTillString :: String -> Parser String
skipTillString s =
manyTill skipRestOfLine $ string s
-- | Parses the output template string
templateStringParser :: Parser (String,String,String)
templateStringParser =
do { s <- nonPlaceHolder
; com <- templateCommandParser
; ss <- nonPlaceHolder
; return (s, com, ss)
}
where
nonPlaceHolder = fmap concat . many $
many1 (noneOf "<") <|> colorSpec <|> iconSpec
-- | Recognizes color specification and returns it unchanged
colorSpec :: Parser String
colorSpec = try (string "</fc>") <|> try (
do string "<fc="
s <- many1 (alphaNum <|> char ',' <|> char '#')
char '>'
return $ "<fc=" ++ s ++ ">")
-- | Recognizes icon specification and returns it unchanged
iconSpec :: Parser String
iconSpec = try (do string "<icon="
i <- manyTill (noneOf ">") (try (string "/>"))
return $ "<icon=" ++ i ++ "/>")
-- | Parses the command part of the template string
templateCommandParser :: Parser String
templateCommandParser =
do { char '<'
; com <- many $ noneOf ">"
; char '>'
; return com
}
-- | Combines the template parsers
templateParser :: Parser [(String,String,String)]
templateParser = many templateStringParser --"%")
trimTo :: Int -> String -> String -> (Int, String)
trimTo n p "" = (n, p)
trimTo n p ('<':cs) = trimTo n p' s
where p' = p ++ "<" ++ takeWhile (/= '>') cs ++ ">"
s = drop 1 (dropWhile (/= '>') cs)
trimTo 0 p s = trimTo 0 p (dropWhile (/= '<') s)
trimTo n p s = let p' = takeWhile (/= '<') s
s' = dropWhile (/= '<') s
in
if length p' <= n
then trimTo (n - length p') (p ++ p') s'
else trimTo 0 (p ++ take n p') s'
-- | Takes a list of strings that represent the values of the exported
-- keys. The strings are joined with the exported keys to form a map
-- to be combined with 'combine' to the parsed template. Returns the
-- final output of the monitor, trimmed to MaxTotalWidth if that
-- configuration value is positive.
parseTemplate :: [String] -> Monitor String
parseTemplate l =
do t <- getConfigValue template
e <- getConfigValue export
w <- getConfigValue maxTotalWidth
ell <- getConfigValue maxTotalWidthEllipsis
let m = Map.fromList . zip e $ l
s <- parseTemplate' t m
let (n, s') = if w > 0 && length s > w
then trimTo (w - length ell) "" s
else (1, s)
return $ if n > 0 then s' else s' ++ ell
-- | Parses the template given to it with a map of export values and combines
-- them
parseTemplate' :: String -> Map.Map String String -> Monitor String
parseTemplate' t m =
do s <- io $ runP templateParser t
combine m s
-- | Given a finite "Map" and a parsed template t produces the
-- | resulting output string as the output of the monitor.
combine :: Map.Map String String -> [(String, String, String)] -> Monitor String
combine _ [] = return []
combine m ((s,ts,ss):xs) =
do next <- combine m xs
str <- case Map.lookup ts m of
Nothing -> return $ "<" ++ ts ++ ">"
Just r -> let f "" = r; f n = n; in f <$> parseTemplate' r m
return $ s ++ str ++ ss ++ next
|
