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|
{-# LANGUAGE OverloadedStrings #-}
{- |
Module : Text.Pandoc.Lua
Copyright : Copyright © 2017-2021 Albert Krewinkel
License : GNU GPL, version 2 or above
Maintainer : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
Stability : alpha
Pandoc's Lua globals.
-}
module Text.Pandoc.Lua.Global
( Global (..)
, setGlobals
) where
import HsLua as Lua
import HsLua.Module.Version (pushVersion)
import Paths_pandoc (version)
import Text.Pandoc.Class.CommonState (CommonState)
import Text.Pandoc.Definition (Pandoc (Pandoc), pandocTypesVersion)
import Text.Pandoc.Error (PandocError)
import Text.Pandoc.Lua.Marshaling ()
import Text.Pandoc.Lua.Marshaling.CommonState (pushCommonState)
import Text.Pandoc.Lua.Marshaling.ReaderOptions (pushReaderOptions)
import Text.Pandoc.Options (ReaderOptions)
import qualified Data.Text as Text
-- | Permissible global Lua variables.
data Global =
FORMAT Text.Text
| PANDOC_API_VERSION
| PANDOC_DOCUMENT Pandoc
| PANDOC_READER_OPTIONS ReaderOptions
| PANDOC_SCRIPT_FILE FilePath
| PANDOC_STATE CommonState
| PANDOC_VERSION
-- Cannot derive instance of Data because of CommonState
-- | Set all given globals.
setGlobals :: [Global] -> LuaE PandocError ()
setGlobals = mapM_ setGlobal
setGlobal :: Global -> LuaE PandocError ()
setGlobal global = case global of
-- This could be simplified if Global was an instance of Data.
FORMAT format -> do
Lua.push format
Lua.setglobal "FORMAT"
PANDOC_API_VERSION -> do
pushVersion pandocTypesVersion
Lua.setglobal "PANDOC_API_VERSION"
PANDOC_DOCUMENT doc -> do
pushUD typePandocLazy doc
Lua.setglobal "PANDOC_DOCUMENT"
PANDOC_READER_OPTIONS ropts -> do
pushReaderOptions ropts
Lua.setglobal "PANDOC_READER_OPTIONS"
PANDOC_SCRIPT_FILE filePath -> do
Lua.push filePath
Lua.setglobal "PANDOC_SCRIPT_FILE"
PANDOC_STATE commonState -> do
pushCommonState commonState
Lua.setglobal "PANDOC_STATE"
PANDOC_VERSION -> do
pushVersion version
Lua.setglobal "PANDOC_VERSION"
-- | Readonly and lazy pandoc objects.
typePandocLazy :: LuaError e => DocumentedType e Pandoc
typePandocLazy = deftype "Pandoc (lazy)" []
[ readonly "meta" "document metadata" (push, \(Pandoc meta _) -> meta)
, readonly "blocks" "content blocks" (push, \(Pandoc _ blocks) -> blocks)
]
|
