+{-# LANGUAGE
+ OverloadedStrings
+ , RankNTypes
+ , UnicodeSyntax
+ , ViewPatterns
+ #-}
module Rakka.Wiki.Parser
( CommandTypeOf
, wikiPage
)
where
-
-import Data.Maybe
-import Rakka.Wiki
-import Text.ParserCombinators.Parsec
-
-
-type CommandTypeOf = String -> Maybe CommandType
-
+-- FIXME: use attoparsec
+import Control.Applicative hiding ((<|>), many)
+import Control.Applicative.Unicode
+import Control.Monad
+import Data.CaseInsensitive (CI)
+import qualified Data.CaseInsensitive as CI
+import Data.Maybe
+import Data.Monoid.Unicode ((⊕))
+import Data.Text (Text)
+import qualified Data.Text as T
+import Network.URI hiding (fragment)
+import Prelude.Unicode
+import Rakka.Wiki
+import Text.ParserCombinators.Parsec hiding (label)
+
+type CommandTypeOf = Alternative f ⇒ Text → f CommandType
wikiPage :: CommandTypeOf -> Parser WikiPage
wikiPage cmdTypeOf
, horizontalLine
, listElement cmdTypeOf
, definitionList cmdTypeOf
- , pdata
+ , verbatim
, leadingSpaced cmdTypeOf
, paragraph cmdTypeOf
, blockCmd cmdTypeOf
]
-
-heading :: Parser BlockElement
+heading ∷ Parser BlockElement
heading = foldr (<|>) pzero (map heading' [1..5])
<?>
"heading"
where
- heading' :: Int -> Parser BlockElement
- heading' n = do try $ do count n (char '=')
- notFollowedBy (char '=')
+ heading' ∷ Int → Parser BlockElement
+ heading' n = do try ( void (count n (char '=')) *>
+ notFollowedBy (char '=')
+ )
ws
- x <- notFollowedBy (char '=') >> anyChar
- xs <- manyTill anyChar (try $ ws >> ( count n (char '=')
- <?>
- ("trailing " ++ take n (repeat '='))
- )
- )
+ x ← notFollowedBy (char '=') *> anyChar
+ xs ← manyTill anyChar (try $ ws *> ( count n (char '=')
+ <?>
+ ("trailing " ++ replicate n '=')
+ )
+ )
ws
eol
- return (Heading n (x:xs))
-
+ pure ∘ Heading n $ T.pack (x:xs)
horizontalLine :: Parser BlockElement
-horizontalLine = try ( do count 4 (char '-')
- many (char '-')
+horizontalLine = try ( do _ <- count 4 (char '-')
+ _ <- many (char '-')
ws
eol
return HorizontalLine
listElement :: CommandTypeOf -> Parser BlockElement
-listElement cmdTypeOf = listElement' [] >>= return . List
+listElement cmdTypeOf = listElement' []
where
- listElement' :: [Char] -> Parser ListElement
+ listElement' :: [Char] -> Parser BlockElement
listElement' stack
= do t <- oneOf "*#"
ws
xs <- items (stack ++ [t])
- return (ListElement (toType t) xs)
+ return (List (toType t) xs)
- -- ListItem の終了條件は、
items :: [Char] -> Parser [ListItem]
items stack = do xs <- many1 $ inlineElement cmdTypeOf
nested <- option Nothing
$ try $ do skipMany comment
- newline
- string stack
- listElement' stack >>= return . Just
+ _ <- newline
+ _ <- string stack
+ liftM Just (listElement' stack)
rest <- items stack
- return $ (map Right xs ++ map Left (catMaybes [nested])) : rest
+ return $ (map Inline xs ++ map Block (catMaybes [nested])) : rest
<|>
(try $ do skipMany comment
- newline
- string stack
+ _ <- newline
+ _ <- string stack
ws
items stack
)
toType :: Char -> ListType
toType '*' = Bullet
toType '#' = Numbered
+ toType _ = undefined
definitionList :: CommandTypeOf -> Parser BlockElement
-definitionList cmdTypeOf = many1 definition >>= return . DefinitionList
+definitionList cmdTypeOf = liftM DefinitionList (many1 definition)
where
definition :: Parser Definition
- definition = do char ';'
- ws
+ definition = do _ <- char ';'
+ _ <- ws
tHead <- inlineElement cmdTypeOf
tRest <- term
d <- description
xs <- description
return (x:xs)
<|>
- try ( do newline
- char ':'
- ws
+ try ( do _ <- newline
+ _ <- char ':'
+ _ <- ws
xs <- description
return (Text "\n" : xs)
)
"description of term"
-pdata :: Parser BlockElement
-pdata = do try (string "<![PDATA[")
- many (oneOf " \t\n")
- x <- pdata'
- return (Preformatted [Text x])
+verbatim ∷ Parser BlockElement
+verbatim = try (string "<!verbatim[") *>
+ many (oneOf " \t\n") *>
+ (Preformatted ∘ (:[]) ∘ Text ∘ T.pack <$> verbatim')
where
- pdata' :: Parser String
- pdata' = do try (many (oneOf " \t\n") >> string "]]>")
- return []
- <|>
- do x <- anyChar
- xs <- pdata'
- return (x:xs)
+ verbatim' :: Parser String
+ verbatim' = try (many (oneOf " \t\n") *> string "]>") *> pure []
+ <|>
+ ((:) <$> anyChar ⊛ verbatim')
leadingSpaced :: CommandTypeOf -> Parser BlockElement
-leadingSpaced cmdTypeOf = (char ' ' >> leadingSpaced' >>= return . Preformatted)
+leadingSpaced cmdTypeOf = liftM Preformatted (char ' ' >> leadingSpaced')
<?>
"leading space"
where
xs <- leadingSpaced'
return (x:xs)
<|>
- try ( newline
- >>
- char ' '
- >>
- leadingSpaced'
- >>=
- return . (Text "\n" :)
+ try ( liftM (Text "\n" :) ( newline
+ >>
+ char ' '
+ >>
+ leadingSpaced'
+ )
)
<|>
return []
-blockCommand :: Parser BlockElement
-blockCommand = pzero -- not implemented
-
-
paragraph :: CommandTypeOf -> Parser BlockElement
-paragraph cmdTypeOf = paragraph' >>= return . Paragraph
+paragraph cmdTypeOf = liftM Paragraph paragraph'
where
paragraph' :: Parser [InlineElement]
paragraph' = do x <- inlineElement cmdTypeOf
- xs <- try ( do newline
- eof
+ xs <- try ( do _ <- newline
+ _ <- eof
return []
-- \n で文字列が終はってゐたら、ここ
-- で終了。
)
<|>
- try ( do newline
- ((oneOf ('\n':blockSymbols) >> pzero) <|> return ())
+ try ( do _ <- newline
+ _ <- ((oneOf ('\n':blockSymbols) >> pzero) <|> return ())
ys <- (paragraph' <|> return [])
return (Text "\n" : ys)
-- \n があり、その次に \n または
- -- blockSymbols があれば、fail して
- -- 最初の newline を讀んだ所まで卷き
- -- 戻す。
+ -- blockSymbols があれば、fail して最
+ -- 初の newline を讀んだ所まで卷き戻
+ -- す。oneOf が一文字消費しているので、
+ -- <|> は右辺を適用せずに try まで戻
+ -- る。
)
<|>
paragraph'
Just BlockCommandType
-> do xs <- contents
closeTag tagName
- return $ BlockCmd $ BlockCommand {
+ return $ BlockCmd BlockCommand {
bCmdName = tagName
, bCmdAttributes = tagAttrs
, bCmdContents = xs
}
- _ -> pzero
+ Just InlineCommandType
+ -> pzero
+ _ -> return $ undefinedCmdErr tagName
)
<|>
(try $ do (tagName, tagAttrs) <- emptyTag
case cmdTypeOf tagName of
Just BlockCommandType
- -> return $ BlockCmd $ BlockCommand {
+ -> return $ BlockCmd BlockCommand {
bCmdName = tagName
, bCmdAttributes = tagAttrs
, bCmdContents = []
}
- _ -> pzero
+ Just InlineCommandType
+ -> pzero
+ _ -> return $ undefinedCmdErr tagName
)
<?>
"block command"
where
- contents :: Parser [BlockElement]
- contents = do x <- try $ blockElement cmdTypeOf
- xs <- contents
- return (x:xs)
+ contents ∷ Parser [BlockElement]
+ contents = ((:) <$> blockElement cmdTypeOf ⊛ contents)
+ <|>
+ (newline *> contents)
<|>
- (comment >> contents)
+ (comment *> contents)
<|>
- return []
+ pure []
+ undefinedCmdErr ∷ Text → BlockElement
+ undefinedCmdErr name
+ = Div [("class", "error")]
+ [ Block (Paragraph [Text ("The command `" ⊕ name ⊕ "' is not defined. " ⊕
+ "Make sure you haven't mistyped.")
+ ])
+ ]
inlineElement :: CommandTypeOf -> Parser InlineElement
inlineElement cmdTypeOf
= try $ do skipMany comment
- foldr (<|>) pzero [ cdata
+ foldr (<|>) pzero [ nowiki
, apostrophes cmdTypeOf
, text
+ , objLink
, pageLink
+ , extLink
, inlineCmd cmdTypeOf
]
-
-cdata :: Parser InlineElement
-cdata = try (string "<![CDATA[") >> cdata' >>= return . Text
+nowiki ∷ Parser InlineElement
+nowiki = Text ∘ T.pack <$> (try (string "<!nowiki[") *> nowiki')
where
- cdata' :: Parser String
- cdata' = do try (string "]]>")
- return []
- <|>
- do x <- anyChar
- xs <- cdata'
- return (x:xs)
-
-
-text :: Parser InlineElement
-text = ( char ':'
- >>
- many (noneOf ('\n':inlineSymbols))
- >>=
- return . Text . (':' :)
- -- 定義リストとの關係上、コロンは先頭にしか來れない。
- )
+ nowiki' ∷ Parser String
+ nowiki' = (try (string "]>") *> pure [])
+ <|>
+ ((:) <$> anyChar ⊛ nowiki')
+
+text ∷ Parser InlineElement
+text = (Text ∘ T.pack ∘ (':' :) <$> ( char ':' *>
+ many (noneOf ('\n':inlineSymbols))
+ ))
+ -- 定義リストとの關係上、コロンは先頭にしか來られない。
<|>
- ( many1 (noneOf ('\n':inlineSymbols))
- >>=
- return . Text
- )
+ (Text ∘ T.pack <$> (many1 (noneOf ('\n':inlineSymbols))))
<?>
"text"
-
apostrophes :: CommandTypeOf -> Parser InlineElement
apostrophes cmdTypeOf = foldr (<|>) pzero (map try [apos1, apos2, apos3, apos4, apos5])
where
apos n = count n (char '\'') >> notFollowedBy (char '\'')
-pageLink :: Parser InlineElement
-pageLink = do try (string "[[")
- page <- option Nothing
- (many1 (noneOf "#|]") >>= return . Just)
- fragment <- option Nothing
- (char '#' >> many1 (noneOf "|]") >>= return . Just)
- text <- option Nothing
- (char '|' >> many1 (satisfy (/= ']')) >>= return . Just)
-
- case (page, fragment) of
- (Nothing, Nothing) -> pzero
- (_, _) -> return ()
-
- string "]]"
- return $ PageLink page fragment text
+objLink ∷ Parser InlineElement
+objLink = do void $ try (string "[[[")
+ page ← many1 (noneOf "|]")
+ label ← option Nothing $
+ Just <$> (char '|' *> many1 (satisfy (≠ ']')))
+ void $ string "]]]"
+ pure $ ObjectLink (T.pack page) (T.pack <$> label)
+ <?>
+ "object link"
+
+pageLink ∷ Parser InlineElement
+pageLink = do void $ try (string "[[")
+ page ← option Nothing $
+ Just <$> many1 (noneOf "#|]")
+ fragment ← option Nothing $
+ Just <$> (char '#' *> many1 (noneOf "|]"))
+ label ← option Nothing $
+ Just <$> (char '|' *> many1 (satisfy (≠ ']')))
+ when (isNothing page ∧ isNothing fragment) (∅)
+ void $ string "]]"
+ pure $ PageLink (T.pack <$> page )
+ (T.pack <$> fragment)
+ (T.pack <$> label )
<?>
"page link"
+extLink ∷ Parser InlineElement
+extLink = do void $ char '['
+ uriStr ← many1 (noneOf " \t]")
+ void $ skipMany (oneOf " \t")
+ label ← option Nothing $
+ Just <$> many1 (noneOf "]")
+ case parseURI uriStr of
+ Just uri → char ']' *> pure (ExternalLink uri (T.pack <$> label))
+ Nothing → pzero <?> "absolute URI"
+ <?>
+ "external link"
-inlineCmd :: CommandTypeOf -> Parser InlineElement
+inlineCmd ∷ CommandTypeOf → Parser InlineElement
inlineCmd cmdTypeOf
- = (try $ do (tagName, tagAttrs) <- openTag
+ = (try $ do (tagName, tagAttrs) ← openTag
case cmdTypeOf tagName of
Just InlineCommandType
- -> do xs <- contents
- closeTag tagName
- return $ InlineCmd $ InlineCommand {
+ → do xs ← contents
+ closeTag tagName
+ pure $ InlineCmd InlineCommand {
iCmdName = tagName
, iCmdAttributes = tagAttrs
, iCmdContents = xs
}
- _ -> pzero
+ _ → pzero
)
<|>
(try $ do (tagName, tagAttrs) <- emptyTag
case cmdTypeOf tagName of
Just InlineCommandType
- -> return $ InlineCmd $ InlineCommand {
+ -> return $ InlineCmd InlineCommand {
iCmdName = tagName
, iCmdAttributes = tagAttrs
, iCmdContents = []
<?>
"inline command"
where
- contents :: Parser [InlineElement]
- contents = do x <- inlineElement cmdTypeOf
- xs <- contents
- return (x:xs)
+ contents ∷ Parser [InlineElement]
+ contents = ((:) <$> inlineElement cmdTypeOf ⊛ contents)
<|>
- (comment >> contents)
+ (comment *> contents)
<|>
- (newline >> contents >>= return . (Text "\n" :))
+ ((Text "\n" :) <$> (newline *> contents))
<|>
- return []
-
-
-openTag :: Parser (String, [Attribute])
-openTag = try $ do char '<'
- many space
- name <- many1 letter
- many space
- attrs <- many $ do attr <- tagAttr
- many space
- return attr
- char '>'
- return (name, attrs)
-
-
-emptyTag :: Parser (String, [Attribute])
-emptyTag = try $ do char '<'
- many space
- name <- many1 letter
- many space
- attrs <- many $ do attr <- tagAttr
- many space
- return attr
- char '/'
- many space
- char '>'
- return (name, attrs)
-
-
-closeTag :: String -> Parser ()
-closeTag name = try $ do char '<'
- many space
- char '/'
- many space
- string name
- many space
- char '>'
- return ()
-
-
-tagAttr :: Parser (String, String)
-tagAttr = do name <- many1 letter
- char '='
- char '"'
- value <- many (satisfy (/= '"'))
- char '"'
- return (name, value)
+ pure []
+
+openTag ∷ Parser (Text, [Attribute])
+openTag = try $ do void $ char '<'
+ void $ many space
+ name ← many1 letter
+ void $ many space
+ attrs ← many $ do attr ← tagAttr
+ void $ many space
+ pure attr
+ void $ char '>'
+ return (T.pack name, attrs)
+
+emptyTag ∷ Parser (Text, [Attribute])
+emptyTag = try $ do void $ char '<'
+ void $ many space
+ name ← many1 letter
+ void $ many space
+ attrs ← many $ do attr ← tagAttr
+ void $ many space
+ pure attr
+ void $ char '/'
+ void $ many space
+ void $ char '>'
+ return (T.pack name, attrs)
+
+closeTag ∷ Text → Parser ()
+closeTag (T.unpack → name)
+ = try ( char '<' *>
+ many space *>
+ char '/' *>
+ many space *>
+ string name *>
+ many space *>
+ char '>' *>
+ pure ()
+ )
+
+tagAttr ∷ Parser (CI Text, Text)
+tagAttr = do name ← many1 letter
+ void $ char '='
+ void $ char '"'
+ value ← many (satisfy (≠ '"'))
+ void $ char '"'
+ return (CI.mk $ T.pack name, T.pack value)
comment :: Parser ()
"comment"
where
skipTillEnd :: Int -> Parser ()
- skipTillEnd level = ( (try (string "<!--") >> skipTillEnd (level + 1))
- <|>
- (try (string "-->") >> case level of
- 1 -> return ()
- n -> skipTillEnd (n - 1))
- <|>
- (anyChar >> skipTillEnd level)
- )
+ skipTillEnd level = (try (string "<!--") >> skipTillEnd (level + 1))
+ <|>
+ (try (string "-->") >> case level of
+ 1 -> return ()
+ n -> skipTillEnd (n - 1))
+ <|>
+ (anyChar >> skipTillEnd level)
blockSymbols :: [Char]
-- end of line
eol :: Parser ()
-eol = ( (newline >> return ())
- <|>
- eof
- )
+eol = (newline >> return ())
+ <|>
+ eof
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