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|
{-# LANGUAGE NoImplicitPrelude #-}
{-
Copyright (C) 2014-2018 Jesse Rosenthal <jrosenthal@jhu.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-}
{- |
Module : Text.Pandoc.Readers.Docx.Fields
Copyright : Copyright (C) 2014-2018 Jesse Rosenthal
License : GNU GPL, version 2 or above
Maintainer : Jesse Rosenthal <jrosenthal@jhu.edu>
Stability : alpha
Portability : portable
For parsing Field definitions in instText tags, as described in
ECMA-376-1:2016, §17.16.5 -}
module Text.Pandoc.Readers.Docx.Fields ( FieldInfo(..)
, parseFieldInfo
) where
import Prelude
import Text.Parsec
import Text.Parsec.String (Parser)
type URL = String
data FieldInfo = HyperlinkField URL
| UnknownField
deriving (Show)
parseFieldInfo :: String -> Either ParseError FieldInfo
parseFieldInfo = parse fieldInfo ""
fieldInfo :: Parser FieldInfo
fieldInfo =
try (HyperlinkField <$> hyperlink)
<|>
return UnknownField
escapedQuote :: Parser String
escapedQuote = string "\\\""
inQuotes :: Parser String
inQuotes =
(try escapedQuote) <|> (anyChar >>= (\c -> return [c]))
quotedString :: Parser String
quotedString = do
char '"'
concat <$> manyTill inQuotes (try (char '"'))
unquotedString :: Parser String
unquotedString = manyTill anyChar (try $ lookAhead space *> return () <|> eof)
fieldArgument :: Parser String
fieldArgument = quotedString <|> unquotedString
-- there are other switches, but this is the only one I've seen in the wild so far, so it's the first one I'll implement. See §17.16.5.25
hyperlinkSwitch :: Parser (String, String)
hyperlinkSwitch = do
sw <- string "\\l"
spaces
farg <- fieldArgument
return (sw, farg)
hyperlink :: Parser URL
hyperlink = do
many space
string "HYPERLINK"
spaces
farg <- fieldArgument
switches <- spaces *> many hyperlinkSwitch
let url = case switches of
("\\l", s) : _ -> farg ++ ('#': s)
_ -> farg
return url
|
