{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeApplications #-}
module Text.Pandoc.Lua.Walk
( SpliceList (..)
, Walkable
, walkSplicing
, walkStraight
, applyStraight
, applySplicing
)
where
import Prelude hiding (lookup)
import Control.Applicative ((<|>))
import Control.Monad ((<$!>), when)
import Data.Data (Data)
import Data.Proxy (Proxy (..))
import HsLua
import Text.Pandoc.Lua.Marshal.Filter
import Text.Pandoc.Lua.SpliceList (SpliceList (..))
import Text.Pandoc.Walk
walkStraight :: forall e a b. (LuaError e, Walkable a b)
=> Name
-> Pusher e a
-> Peeker e a
-> Filter
-> b -> LuaE e b
walkStraight :: Name -> Pusher e a -> Peeker e a -> Filter -> b -> LuaE e b
walkStraight Name
filterFnName Pusher e a
pushElement Peeker e a
peekElement Filter
filter' =
case Name
filterFnName Name -> Filter -> Maybe FilterFunction
`lookup` Filter
filter' of
Maybe FilterFunction
Nothing ->
b -> LuaE e b
forall (f :: * -> *) a. Applicative f => a -> f a
pure
Just FilterFunction
fn ->
(a -> LuaE e a) -> b -> LuaE e b
forall a b (m :: * -> *).
(Walkable a b, Monad m, Applicative m, Functor m) =>
(a -> m a) -> b -> m b
walkM ((a -> LuaE e a) -> b -> LuaE e b)
-> (a -> LuaE e a) -> b -> LuaE e b
forall a b. (a -> b) -> a -> b
$ FilterFunction -> Pusher e a -> Peeker e a -> a -> LuaE e a
forall e a.
LuaError e =>
FilterFunction -> Pusher e a -> Peeker e a -> a -> LuaE e a
applyStraightFunction FilterFunction
fn Pusher e a
pushElement Peeker e a
peekElement
applyStraight :: (LuaError e, Data a)
=> Pusher e a -> Peeker e a -> Filter
-> a -> LuaE e a
applyStraight :: Pusher e a -> Peeker e a -> Filter -> a -> LuaE e a
applyStraight Pusher e a
pushElement Peeker e a
peekElement Filter
filter' a
x = do
case Filter
filter' Filter -> a -> Maybe FilterFunction
forall a. Data a => Filter -> a -> Maybe FilterFunction
`getFunctionFor` a
x of
Maybe FilterFunction
Nothing ->
a -> LuaE e a
forall (f :: * -> *) a. Applicative f => a -> f a
pure a
x
Just FilterFunction
fn -> do
FilterFunction -> Pusher e a -> Peeker e a -> a -> LuaE e a
forall e a.
LuaError e =>
FilterFunction -> Pusher e a -> Peeker e a -> a -> LuaE e a
applyStraightFunction FilterFunction
fn Pusher e a
pushElement Peeker e a
peekElement a
x
applyStraightFunction :: LuaError e
=> FilterFunction -> Pusher e a -> Peeker e a
-> a -> LuaE e a
applyStraightFunction :: FilterFunction -> Pusher e a -> Peeker e a -> a -> LuaE e a
applyStraightFunction FilterFunction
fn Pusher e a
pushElement Peeker e a
peekElement a
x = do
FilterFunction -> LuaE e ()
forall e. LuaError e => FilterFunction -> LuaE e ()
pushFilterFunction FilterFunction
fn
Pusher e a
pushElement a
x
NumArgs -> NumResults -> LuaE e ()
forall e. LuaError e => NumArgs -> NumResults -> LuaE e ()
callWithTraceback NumArgs
1 NumResults
1
Peek e a -> LuaE e a
forall e a. LuaError e => Peek e a -> LuaE e a
forcePeek (Peek e a -> LuaE e a)
-> (Peek e a -> Peek e a) -> Peek e a -> LuaE e a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Peek e a -> LuaE e () -> Peek e a
forall e a b. Peek e a -> LuaE e b -> Peek e a
`lastly` Int -> LuaE e ()
forall e. Int -> LuaE e ()
pop Int
1) (Peek e a -> LuaE e a) -> Peek e a -> LuaE e a
forall a b. (a -> b) -> a -> b
$
(a
x a -> Peek e () -> Peek e a
forall (f :: * -> *) a b. Functor f => a -> f b -> f a
<$ Peeker e ()
forall e. Peeker e ()
peekNil StackIndex
top) Peek e a -> Peek e a -> Peek e a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> Peeker e a
peekElement StackIndex
top
walkSplicing :: forall e a b. (LuaError e, Data a, Walkable (SpliceList a) b)
=> Pusher e a
-> Peeker e [a]
-> Filter
-> b -> LuaE e b
walkSplicing :: Pusher e a -> Peeker e [a] -> Filter -> b -> LuaE e b
walkSplicing Pusher e a
pushElement Peeker e [a]
peekElementOrList Filter
filter' =
if (Name -> Bool) -> [Name] -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
any (Name -> Filter -> Bool
`member` Filter
filter') [Name]
acceptedNames
then (SpliceList a -> LuaE e (SpliceList a)) -> b -> LuaE e b
forall a b (m :: * -> *).
(Walkable a b, Monad m, Applicative m, Functor m) =>
(a -> m a) -> b -> m b
walkM ((SpliceList a -> LuaE e (SpliceList a)) -> b -> LuaE e b)
-> (SpliceList a -> LuaE e (SpliceList a)) -> b -> LuaE e b
forall a b. (a -> b) -> a -> b
$ \(SpliceList [a]
xs) -> [a] -> SpliceList a
forall a. [a] -> SpliceList a
SpliceList ([a] -> SpliceList a) -> LuaE e [a] -> LuaE e (SpliceList a)
forall (m :: * -> *) a b. Monad m => (a -> b) -> m a -> m b
<$!> ([[a]] -> [a]) -> LuaE e [[a]] -> LuaE e [a]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap [[a]] -> [a]
forall a. Monoid a => [a] -> a
mconcat ((a -> LuaE e [a]) -> [a] -> LuaE e [[a]]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM a -> LuaE e [a]
f [a]
xs)
else b -> LuaE e b
forall (f :: * -> *) a. Applicative f => a -> f a
pure
where
f :: a -> LuaE e [a]
f :: a -> LuaE e [a]
f = Pusher e a -> Peeker e [a] -> Filter -> a -> LuaE e [a]
forall e a.
(LuaError e, Data a) =>
Pusher e a -> Peeker e [a] -> Filter -> a -> LuaE e [a]
applySplicing Pusher e a
pushElement Peeker e [a]
peekElementOrList Filter
filter'
acceptedNames :: [Name]
acceptedNames :: [Name]
acceptedNames = Proxy a -> Name
forall a. Data a => Proxy a -> Name
baseFunctionName (Proxy a
forall k (t :: k). Proxy t
Proxy @a) Name -> [Name] -> [Name]
forall a. a -> [a] -> [a]
: Proxy a -> [Name]
forall a. Data a => Proxy a -> [Name]
valueFunctionNames (Proxy a
forall k (t :: k). Proxy t
Proxy @a)
applySplicing :: (LuaError e, Data a)
=> Pusher e a -> Peeker e [a] -> Filter
-> a -> LuaE e [a]
applySplicing :: Pusher e a -> Peeker e [a] -> Filter -> a -> LuaE e [a]
applySplicing Pusher e a
pushElement Peeker e [a]
peekElements Filter
filter' a
x = do
case Filter
filter' Filter -> a -> Maybe FilterFunction
forall a. Data a => Filter -> a -> Maybe FilterFunction
`getFunctionFor` a
x of
Maybe FilterFunction
Nothing ->
[a] -> LuaE e [a]
forall (f :: * -> *) a. Applicative f => a -> f a
pure [a
x]
Just FilterFunction
fn -> do
FilterFunction -> Pusher e a -> Peeker e [a] -> a -> LuaE e [a]
forall e a.
LuaError e =>
FilterFunction -> Pusher e a -> Peeker e [a] -> a -> LuaE e [a]
applySplicingFunction FilterFunction
fn Pusher e a
pushElement Peeker e [a]
peekElements a
x
applySplicingFunction :: LuaError e
=> FilterFunction -> Pusher e a -> Peeker e [a]
-> a -> LuaE e [a]
applySplicingFunction :: FilterFunction -> Pusher e a -> Peeker e [a] -> a -> LuaE e [a]
applySplicingFunction FilterFunction
fn Pusher e a
pushElement Peeker e [a]
peekElements a
x = do
FilterFunction -> LuaE e ()
forall e. LuaError e => FilterFunction -> LuaE e ()
pushFilterFunction FilterFunction
fn
Pusher e a
pushElement a
x
NumArgs -> NumResults -> LuaE e ()
forall e. LuaError e => NumArgs -> NumResults -> LuaE e ()
callWithTraceback NumArgs
1 NumResults
1
Peek e [a] -> LuaE e [a]
forall e a. LuaError e => Peek e a -> LuaE e a
forcePeek (Peek e [a] -> LuaE e [a])
-> (Peek e [a] -> Peek e [a]) -> Peek e [a] -> LuaE e [a]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Peek e [a] -> LuaE e () -> Peek e [a]
forall e a b. Peek e a -> LuaE e b -> Peek e a
`lastly` Int -> LuaE e ()
forall e. Int -> LuaE e ()
pop Int
1) (Peek e [a] -> LuaE e [a]) -> Peek e [a] -> LuaE e [a]
forall a b. (a -> b) -> a -> b
$ LuaE e Type -> Peek e Type
forall e a. LuaE e a -> Peek e a
liftLua (StackIndex -> LuaE e Type
forall e. StackIndex -> LuaE e Type
ltype StackIndex
top) Peek e Type -> (Type -> Peek e [a]) -> Peek e [a]
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \case
Type
TypeNil -> [a] -> Peek e [a]
forall (f :: * -> *) a. Applicative f => a -> f a
pure [a
x]
Type
_ -> Peeker e [a]
peekElements StackIndex
top
callWithTraceback :: forall e. LuaError e
=> NumArgs -> NumResults -> LuaE e ()
callWithTraceback :: NumArgs -> NumResults -> LuaE e ()
callWithTraceback NumArgs
nargs NumResults
nresults = do
let traceback' :: LuaE e NumResults
traceback' :: LuaE e NumResults
traceback' = do
State
l <- LuaE e State
forall e. LuaE e State
state
ByteString
msg <- StackIndex -> LuaE e ByteString
forall e. LuaError e => StackIndex -> LuaE e ByteString
tostring' (CInt -> StackIndex
nthBottom CInt
1)
State -> Maybe ByteString -> Int -> LuaE e ()
forall e. State -> Maybe ByteString -> Int -> LuaE e ()
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
absindex (CInt -> StackIndex
nth (NumArgs -> CInt
fromNumArgs NumArgs
nargs CInt -> CInt -> CInt
forall a. Num a => a -> a -> a
+ CInt
1))
LuaE e NumResults -> LuaE e ()
forall e. LuaError e => HaskellFunction e -> LuaE e ()
pushHaskellFunction LuaE e NumResults
traceback'
StackIndex -> LuaE e ()
forall e. StackIndex -> LuaE e ()
insert StackIndex
tracebackIdx
Status
result <- NumArgs -> NumResults -> Maybe StackIndex -> LuaE e Status
forall e.
NumArgs -> NumResults -> Maybe StackIndex -> LuaE e Status
pcall NumArgs
nargs NumResults
nresults (StackIndex -> Maybe StackIndex
forall a. a -> Maybe a
Just StackIndex
tracebackIdx)
StackIndex -> LuaE e ()
forall e. StackIndex -> LuaE e ()
remove StackIndex
tracebackIdx
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
OK)
LuaE e ()
forall e a. LuaError e => LuaE e a
throwErrorAsException