diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Parsers.hs | 42 | 
1 files changed, 35 insertions, 7 deletions
| diff --git a/src/Parsers.hs b/src/Parsers.hs index f25fd4d..cda7004 100644 --- a/src/Parsers.hs +++ b/src/Parsers.hs @@ -25,6 +25,7 @@ import Runnable  import Commands  import Actions +import Control.Monad (guard, mzero)  import qualified Data.Map as Map  import Text.ParserCombinators.Parsec  import Text.ParserCombinators.Parsec.Perm @@ -43,11 +44,20 @@ parseString c s =                            , Nothing)]        Right x -> return (concat x) +allParsers :: ColorString +           -> Maybe [Action] +           -> Parser [(Widget, ColorString, Maybe [Action])] +allParsers c a = +        textParser c a +  <|> try (iconParser c a) +  <|> try (rawParser c a) +  <|> try (actionParser c a) +  <|> colorParser a +  -- | Gets the string and combines the needed parsers  stringParser :: String -> Maybe [Action]                  -> Parser [[(Widget, ColorString, Maybe [Action])]] -stringParser c a = manyTill (textParser c a <|> try (iconParser c a) <|> -                             try (actionParser c a) <|> colorParser a) eof +stringParser c a = manyTill (allParsers c a) eof  -- | Parses a maximal string without color markup.  textParser :: String -> Maybe [Action] @@ -59,9 +69,30 @@ textParser c a = do s <- many1 $                                     try (string "action=") <|>                                     try (string "/action>") <|>                                     try (string "icon=") <|> +                                   try (string "raw=") <|>                                     string "/fc>"))                      return [(Text s, c, a)] +-- | Parse a "raw" tag, which we use to prevent other tags from creeping in. +-- The format here is net-string-esque: a literal "<raw=" followed by a +-- string of digits (base 10) denoting the length of the raw string, +-- a literal ":" as digit-string-terminator, the raw string itself, and +-- then a literal "/>". +rawParser :: ColorString +          -> Maybe [Action] +          -> Parser [(Widget, ColorString, Maybe [Action])] +rawParser c a = do +  string "<raw=" +  lenstr <- many1 digit +  char ':' +  case reads lenstr of +    [(len,[])] -> do +      guard ((len :: Integer) <= (fromIntegral (maxBound :: Int))) +      s <- count (fromIntegral len) anyChar +      string "/>" +      return [(Text s, c, 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. @@ -88,9 +119,7 @@ actionParser c act = do        a' = case act of          Nothing -> Just [a]          Just act' -> Just $ a : act' -  s <- manyTill (try (textParser c a') <|> try (iconParser c a') <|> -                 try (colorParser a') <|> actionParser c a') -                (try $ string "</action>") +  s <- manyTill (allParsers c a') (try $ string "</action>")    return (concat s)  toButtons :: String -> [Button] @@ -100,8 +129,7 @@ toButtons s = map (\x -> read [x]) s  colorParser :: Maybe [Action] -> Parser [(Widget, ColorString, Maybe [Action])]  colorParser a = do    c <- between (string "<fc=") (string ">") colors -  s <- manyTill (try (textParser c a) <|> try (iconParser c a) <|> -                 try (colorParser a) <|> actionParser c a) (try $ string "</fc>") +  s <- manyTill (allParsers c a) (try $ string "</fc>")    return (concat s)  -- | Parses a color specification (hex or named) | 
