From 50134d5b5c4baabdfb35c0aeb8bf53d29f009c4d Mon Sep 17 00:00:00 2001 From: jao Date: Wed, 21 Nov 2018 23:51:41 +0000 Subject: All sources moved inside src --- src/lib/Xmobar/Parsers.hs | 190 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 190 insertions(+) create mode 100644 src/lib/Xmobar/Parsers.hs (limited to 'src/lib/Xmobar/Parsers.hs') diff --git a/src/lib/Xmobar/Parsers.hs b/src/lib/Xmobar/Parsers.hs new file mode 100644 index 0000000..33afd09 --- /dev/null +++ b/src/lib/Xmobar/Parsers.hs @@ -0,0 +1,190 @@ +{-# LANGUAGE FlexibleContexts #-} + +----------------------------------------------------------------------------- +-- | +-- Module : Xmobar.Parsers +-- Copyright : (c) Andrea Rossato +-- License : BSD-style (see LICENSE) +-- +-- Maintainer : Jose A. Ortega Ruiz +-- Stability : unstable +-- Portability : unportable +-- +-- Parsers needed for Xmobar, a text based status bar +-- +----------------------------------------------------------------------------- + +module Xmobar.Parsers + ( parseString + , parseTemplate + , Widget(..) + ) where + +import Xmobar.Config +import Xmobar.Runnable +import Xmobar.Commands +import Xmobar.Actions + +import Control.Monad (guard, mzero) +import qualified Data.Map as Map +import Text.ParserCombinators.Parsec +import Graphics.X11.Types (Button) + +data Widget = Icon String | Text String + +type ColorString = String +type FontIndex = Int + +-- | Runs the string parser +parseString :: Config -> String -> IO [(Widget, ColorString, FontIndex, Maybe [Action])] +parseString c s = + case parse (stringParser (fgColor c) 0 Nothing) "" s of + Left _ -> return [(Text $ "Could not parse string: " ++ s + , fgColor c + , 0 + , Nothing)] + Right x -> return (concat x) + +allParsers :: ColorString + -> FontIndex + -> Maybe [Action] + -> Parser [(Widget, ColorString, FontIndex, Maybe [Action])] +allParsers c f a = + textParser c f a + <|> try (iconParser c f a) + <|> try (rawParser c f a) + <|> try (actionParser c f a) + <|> try (fontParser c a) + <|> colorParser f a + +-- | Gets the string and combines the needed parsers +stringParser :: String -> FontIndex -> Maybe [Action] + -> Parser [[(Widget, ColorString, FontIndex, Maybe [Action])]] +stringParser c f a = manyTill (allParsers c f a) eof + +-- | Parses a maximal string without color markup. +textParser :: String -> FontIndex -> Maybe [Action] + -> Parser [(Widget, ColorString, FontIndex, Maybe [Action])] +textParser c f a = do s <- many1 $ + noneOf "<" <|> + try (notFollowedBy' (char '<') + (try (string "fc=") <|> + try (string "fn=") <|> + try (string "action=") <|> + try (string "/action>") <|> + try (string "icon=") <|> + try (string "raw=") <|> + try (string "/fn>") <|> + string "/fc>")) + return [(Text s, c, f, a)] + +-- | Parse a "raw" tag, which we use to prevent other tags from creeping in. +-- The format here is net-string-esque: a literal "". +rawParser :: ColorString + -> FontIndex + -> Maybe [Action] + -> Parser [(Widget, ColorString, FontIndex, Maybe [Action])] +rawParser c f a = do + string " do + guard ((len :: Integer) <= fromIntegral (maxBound :: Int)) + s <- count (fromIntegral len) anyChar + string "/>" + return [(Text s, c, f, a)] + _ -> mzero + +-- | Wrapper for notFollowedBy that returns the result of the first parser. +-- Also works around the issue that, at least in Parsec 3.0.0, notFollowedBy +-- accepts only parsers with return type Char. +notFollowedBy' :: Parser a -> Parser b -> Parser a +notFollowedBy' p e = do x <- p + notFollowedBy $ try (e >> return '*') + return x + +iconParser :: String -> FontIndex -> Maybe [Action] + -> Parser [(Widget, ColorString, FontIndex, Maybe [Action])] +iconParser c f a = do + string "") (try (string "/>")) + return [(Icon i, c, f, a)] + +actionParser :: String -> FontIndex -> Maybe [Action] -> Parser [(Widget, ColorString, FontIndex, Maybe [Action])] +actionParser c f act = do + string "")] + buttons <- (char '>' >> return "1") <|> (space >> spaces >> + between (string "button=") (string ">") (many1 (oneOf "12345"))) + let a = Spawn (toButtons buttons) command + a' = case act of + Nothing -> Just [a] + Just act' -> Just $ a : act' + s <- manyTill (allParsers c f a') (try $ string "") + return (concat s) + +toButtons :: String -> [Button] +toButtons = map (\x -> read [x]) + +-- | Parsers a string wrapped in a color specification. +colorParser :: FontIndex -> Maybe [Action] -> Parser [(Widget, ColorString, FontIndex, Maybe [Action])] +colorParser f a = do + c <- between (string "") colors + s <- manyTill (allParsers c f a) (try $ string "") + return (concat s) + +-- | Parsers a string wrapped in a font specification. +fontParser :: ColorString -> Maybe [Action] -> Parser [(Widget, ColorString, FontIndex, Maybe [Action])] +fontParser c a = do + f <- between (string "") colors + s <- manyTill (allParsers c (read f) a) (try $ string "") + return (concat s) + +-- | Parses a color specification (hex or named) +colors :: Parser String +colors = many1 (alphaNum <|> char ',' <|> char '#') + +-- | Parses the output template string +templateStringParser :: Config -> Parser (String,String,String) +templateStringParser c = do + s <- allTillSep c + com <- templateCommandParser c + ss <- allTillSep c + return (com, s, ss) + +-- | Parses the command part of the template string +templateCommandParser :: Config -> Parser String +templateCommandParser c = + let chr = char . head . sepChar + in between (chr c) (chr c) (allTillSep c) + +-- | Combines the template parsers +templateParser :: Config -> Parser [(String,String,String)] +templateParser = many . templateStringParser + +-- | Actually runs the template parsers +parseTemplate :: Config -> String -> IO [(Runnable,String,String)] +parseTemplate c s = + do str <- case parse (templateParser c) "" s of + Left _ -> return [("", s, "")] + Right x -> return x + let cl = map alias (commands c) + m = Map.fromList $ zip cl (commands c) + return $ combine c m str + +-- | Given a finite "Map" and a parsed template produce the resulting +-- output string. +combine :: Config -> Map.Map String Runnable + -> [(String, String, String)] -> [(Runnable,String,String)] +combine _ _ [] = [] +combine c m ((ts,s,ss):xs) = (com, s, ss) : combine c m xs + where com = Map.findWithDefault dflt ts m + dflt = Run $ Com ts [] [] 10 + +allTillSep :: Config -> Parser String +allTillSep = many . noneOf . sepChar -- cgit v1.2.3