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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, newtable, push, pushhsfunction, rawset)
import Text.Pandoc.Class hiding ( readDataFile )
import Text.Pandoc.Definition ( Pandoc(..), Block(..) )
import Text.Pandoc.Lua.Compat ( loadstring )
import Text.Pandoc.Lua.StackInstances ()
import Text.Pandoc.Readers.DocBook ( readDocBook )
import Text.Pandoc.Readers.HTML ( readHtml )
import Text.Pandoc.Readers.LaTeX ( readLaTeX )
import Text.Pandoc.Readers.Native ( readNative )
import Text.Pandoc.Readers.Markdown ( readMarkdown )
import Text.Pandoc.Readers.MediaWiki ( readMediaWiki )
import Text.Pandoc.Readers.Org ( readOrg )
import Text.Pandoc.Readers.RST ( readRST )
import Text.Pandoc.Readers.Textile ( readTextile )
import Text.Pandoc.Readers.TWiki ( readTWiki )
import Text.Pandoc.Readers.Txt2Tags ( readTxt2Tags )
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 "reader"
pushReadersModule lua readers
rawset lua (-3)
readers :: [(String, String -> PandocIO Pandoc)]
readers =
[ ("docbook", readDocBook def)
, ("html", readHtml def)
, ("latex", readLaTeX def)
, ("native", readNative def)
, ("markdown", readMarkdown def)
, ("mediawiki", readMediaWiki def)
, ("org", readOrg def)
, ("rst", readRST def)
, ("textile", readTextile def)
, ("twiki", readTWiki def)
, ("txt2tags", readTxt2Tags def)
]
-- | Get the string representation of the pandoc module
pandocModuleScript :: IO String
pandocModuleScript = unpack <$> readDataFile Nothing "pandoc.lua"
-- | Push a lua table containing readers of the given formats.
pushReadersModule :: LuaState
-> [(String, String -> PandocIO Pandoc)]
-> IO ()
pushReadersModule lua readerFns = do
newtable lua
mapM_ (uncurry $ addReaderTable) readerFns
where
addReaderTable :: String
-> (String -> PandocIO Pandoc)
-> IO ()
addReaderTable formatName readerFn = do
let readDoc :: String -> IO Pandoc
readDoc s = do
res <- runIO $ readerFn s
case res of
(Left x) -> error (show x)
(Right x) -> return x
let readBlock :: String -> IO Block
readBlock s = do
Pandoc _ blks <- readDoc s
return $ case blks of
x:_ -> x
_ -> Null
-- Push table containing all functions for this format
push lua formatName
newtable lua
-- set document-reading function
push lua "read_doc"
pushhsfunction lua readDoc
rawset lua (-3)
-- set block-reading function
push lua "read_block"
pushhsfunction lua readBlock
rawset lua (-3)
-- store table in readers module
rawset lua (-3)
|
