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{-
Copyright © 2017 Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
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.Lua.PandocModule
Copyright : Copyright © 2017 Albert Krewinkel
License : GNU GPL, version 2 or above
Maintainer : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
Stability : alpha
Pandoc module for lua.
-}
module Text.Pandoc.Lua.PandocModule ( pushPandocModule ) where
import Data.ByteString.Char8 ( unpack )
import Data.Default ( Default(..) )
import Scripting.Lua ( LuaState, call, push, pushhsfunction, rawset)
import Text.Pandoc.Class hiding ( readDataFile )
import Text.Pandoc.Definition ( Pandoc )
import Text.Pandoc.Lua.Compat ( loadstring )
import Text.Pandoc.Lua.StackInstances ()
import Text.Pandoc.Readers ( Reader(..), getReader )
import Text.Pandoc.Shared ( readDataFile )
-- | Push the "pandoc" on the lua stack.
pushPandocModule :: LuaState -> IO ()
pushPandocModule lua = do
script <- pandocModuleScript
status <- loadstring lua script "pandoc.lua"
if (status /= 0)
then return ()
else do
call lua 0 1
push lua "__read"
pushhsfunction lua read_doc
rawset lua (-3)
-- | Get the string representation of the pandoc module
pandocModuleScript :: IO String
pandocModuleScript = unpack <$> readDataFile Nothing "pandoc.lua"
read_doc :: String -> String -> IO (Either String Pandoc)
read_doc formatSpec content = do
case getReader formatSpec of
Left s -> return $ Left s
Right reader ->
case reader of
StringReader r -> do
res <- runIO $ r def content
case res of
Left s -> return . Left $ show s
Right pd -> return $ Right pd
_ -> return $ Left "Only string formats are supported at the moment."
|
