{-# LANGUAGE AllowAmbiguousTypes #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeApplications #-}
module Text.Pandoc.Lua.Util
( getTag
, addField
, callWithTraceback
, dofileWithTraceback
, pushViaConstr'
) where
import Control.Monad (unless, when)
import HsLua
import qualified HsLua as Lua
addField :: (LuaError e, Pushable a) => String -> a -> LuaE e ()
addField :: String -> a -> LuaE e ()
addField String
key a
value = do
String -> LuaE e ()
forall a e. (Pushable a, LuaError e) => a -> LuaE e ()
Lua.push String
key
a -> LuaE e ()
forall a e. (Pushable a, LuaError e) => a -> LuaE e ()
Lua.push a
value
StackIndex -> LuaE e ()
forall e. LuaError e => StackIndex -> LuaE e ()
Lua.rawset (CInt -> StackIndex
Lua.nth CInt
3)
getTag :: LuaError e => Peeker e Name
getTag :: Peeker e Name
getTag StackIndex
idx = do
LuaE e () -> Peek e ()
forall e a. LuaE e a -> Peek e a
liftLua (LuaE e () -> Peek e ()) -> LuaE e () -> Peek e ()
forall a b. (a -> b) -> a -> b
$ do
StackIndex -> LuaE e Bool
forall e. StackIndex -> LuaE e Bool
Lua.getmetatable StackIndex
idx LuaE e Bool -> (Bool -> LuaE e ()) -> LuaE e ()
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \Bool
hasMT -> Bool -> LuaE e () -> LuaE e ()
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
unless Bool
hasMT (StackIndex -> LuaE e ()
forall e. StackIndex -> LuaE e ()
Lua.pushvalue StackIndex
idx)
Name -> LuaE e ()
forall e. Name -> LuaE e ()
Lua.pushName Name
"tag"
StackIndex -> LuaE e ()
forall e. LuaError e => StackIndex -> LuaE e ()
Lua.rawget (CInt -> StackIndex
Lua.nth CInt
2)
Peeker e Name
forall e. Peeker e Name
Lua.peekName StackIndex
Lua.top Peek e Name -> LuaE e () -> Peek e Name
forall e a b. Peek e a -> LuaE e b -> Peek e a
`lastly` Int -> LuaE e ()
forall e. Int -> LuaE e ()
Lua.pop Int
2
pushViaConstr' :: forall e. LuaError e => Name -> [LuaE e ()] -> LuaE e ()
pushViaConstr' :: Name -> [LuaE e ()] -> LuaE e ()
pushViaConstr' Name
fnname [LuaE e ()]
pushArgs = do
Name -> LuaE e ()
forall e. Name -> LuaE e ()
pushName @e (Name
"pandoc." Name -> Name -> Name
forall a. Semigroup a => a -> a -> a
<> Name
fnname)
StackIndex -> LuaE e ()
forall e. LuaError e => StackIndex -> LuaE e ()
rawget @e StackIndex
registryindex
[LuaE e ()] -> LuaE e ()
forall (t :: * -> *) (m :: * -> *) a.
(Foldable t, Monad m) =>
t (m a) -> m ()
sequence_ [LuaE e ()]
pushArgs
NumArgs -> NumResults -> LuaE e ()
forall e. LuaError e => NumArgs -> NumResults -> LuaE e ()
call @e (Int -> NumArgs
forall a b. (Integral a, Num b) => a -> b
fromIntegral ([LuaE e ()] -> Int
forall (t :: * -> *) a. Foldable t => t a -> Int
length [LuaE e ()]
pushArgs)) NumResults
1
pcallWithTraceback :: LuaError e => NumArgs -> NumResults -> LuaE e Status
pcallWithTraceback :: NumArgs -> NumResults -> LuaE e Status
pcallWithTraceback NumArgs
nargs NumResults
nresults = do
let traceback' :: LuaError e => LuaE e NumResults
traceback' :: LuaE e NumResults
traceback' = do
State
l <- LuaE e State
forall e. LuaE e State
Lua.state
ByteString
msg <- StackIndex -> LuaE e ByteString
forall e. LuaError e => StackIndex -> LuaE e ByteString
Lua.tostring' (CInt -> StackIndex
Lua.nthBottom CInt
1)
State -> Maybe ByteString -> Int -> LuaE e ()
forall e. State -> Maybe ByteString -> Int -> LuaE e ()
Lua.traceback State
l (ByteString -> Maybe ByteString
forall a. a -> Maybe a
Just ByteString
msg) Int
2
NumResults -> LuaE e NumResults
forall (m :: * -> *) a. Monad m => a -> m a
return NumResults
1
StackIndex
tracebackIdx <- StackIndex -> LuaE e StackIndex
forall e. StackIndex -> LuaE e StackIndex
Lua.absindex (CInt -> StackIndex
Lua.nth (NumArgs -> CInt
Lua.fromNumArgs NumArgs
nargs CInt -> CInt -> CInt
forall a. Num a => a -> a -> a
+ CInt
1))
HaskellFunction e -> LuaE e ()
forall e. LuaError e => HaskellFunction e -> LuaE e ()
Lua.pushHaskellFunction HaskellFunction e
forall e. LuaError e => LuaE e NumResults
traceback'
StackIndex -> LuaE e ()
forall e. StackIndex -> LuaE e ()
Lua.insert StackIndex
tracebackIdx
Status
result <- NumArgs -> NumResults -> Maybe StackIndex -> LuaE e Status
forall e.
NumArgs -> NumResults -> Maybe StackIndex -> LuaE e Status
Lua.pcall NumArgs
nargs NumResults
nresults (StackIndex -> Maybe StackIndex
forall a. a -> Maybe a
Just StackIndex
tracebackIdx)
StackIndex -> LuaE e ()
forall e. StackIndex -> LuaE e ()
Lua.remove StackIndex
tracebackIdx
Status -> LuaE e Status
forall (m :: * -> *) a. Monad m => a -> m a
return Status
result
callWithTraceback :: LuaError e => NumArgs -> NumResults -> LuaE e ()
callWithTraceback :: NumArgs -> NumResults -> LuaE e ()
callWithTraceback NumArgs
nargs NumResults
nresults = do
Status
result <- NumArgs -> NumResults -> LuaE e Status
forall e. LuaError e => NumArgs -> NumResults -> LuaE e Status
pcallWithTraceback NumArgs
nargs NumResults
nresults
Bool -> LuaE e () -> LuaE e ()
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
when (Status
result Status -> Status -> Bool
forall a. Eq a => a -> a -> Bool
/= Status
Lua.OK)
LuaE e ()
forall e a. LuaError e => LuaE e a
Lua.throwErrorAsException
dofileWithTraceback :: LuaError e => FilePath -> LuaE e Status
dofileWithTraceback :: String -> LuaE e Status
dofileWithTraceback String
fp = do
Status
loadRes <- String -> LuaE e Status
forall e. String -> LuaE e Status
Lua.loadfile String
fp
case Status
loadRes of
Status
Lua.OK -> NumArgs -> NumResults -> LuaE e Status
forall e. LuaError e => NumArgs -> NumResults -> LuaE e Status
pcallWithTraceback NumArgs
0 NumResults
Lua.multret
Status
_ -> Status -> LuaE e Status
forall (m :: * -> *) a. Monad m => a -> m a
return Status
loadRes