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|
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}
{- |
Module : Text.Pandoc.Lua.Marshaling.ReaderOptions
Copyright : © 2012-2021 John MacFarlane
© 2017-2021 Albert Krewinkel
License : GNU GPL, version 2 or above
Maintainer : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
Stability : alpha
Marshaling instance for ReaderOptions and its components.
-}
module Text.Pandoc.Lua.Marshal.ReaderOptions
( peekReaderOptions
, pushReaderOptions
, pushReaderOptionsReadonly
) where
import Data.Default (def)
import HsLua as Lua
import Text.Pandoc.Lua.Marshal.List (pushPandocList)
import Text.Pandoc.Options (ReaderOptions (..))
--
-- Reader Options
--
-- | Retrieve a ReaderOptions value, either from a normal ReaderOptions
-- value, from a read-only object, or from a table with the same
-- keys as a ReaderOptions object.
peekReaderOptions :: LuaError e => Peeker e ReaderOptions
peekReaderOptions = retrieving "ReaderOptions" . \idx ->
liftLua (ltype idx) >>= \case
TypeUserdata -> choice [ peekUD typeReaderOptions
, peekUD typeReaderOptionsReadonly
]
idx
TypeTable -> peekReaderOptionsTable idx
_ -> failPeek =<<
typeMismatchMessage "ReaderOptions userdata or table" idx
-- | Pushes a ReaderOptions value as userdata object.
pushReaderOptions :: LuaError e => Pusher e ReaderOptions
pushReaderOptions = pushUD typeReaderOptions
-- | Pushes a ReaderOptions object, but makes it read-only.
pushReaderOptionsReadonly :: LuaError e => Pusher e ReaderOptions
pushReaderOptionsReadonly = pushUD typeReaderOptionsReadonly
-- | ReaderOptions object type for read-only values.
typeReaderOptionsReadonly :: LuaError e => DocumentedType e ReaderOptions
typeReaderOptionsReadonly = deftype "ReaderOptions (read-only)"
[ operation Tostring $ lambda
### liftPure show
<#> udparam typeReaderOptions "opts" "options to print in native format"
=#> functionResult pushString "string" "Haskell representation"
, operation Newindex $ lambda
### (failLua "This ReaderOptions value is read-only.")
=?> "Throws an error when called, i.e., an assignment is made."
]
readerOptionsMembers
-- | 'ReaderOptions' object type.
typeReaderOptions :: LuaError e => DocumentedType e ReaderOptions
typeReaderOptions = deftype "ReaderOptions"
[ operation Tostring $ lambda
### liftPure show
<#> udparam typeReaderOptions "opts" "options to print in native format"
=#> functionResult pushString "string" "Haskell representation"
]
readerOptionsMembers
-- | Member properties of 'ReaderOptions' Lua values.
readerOptionsMembers :: LuaError e
=> [Member e (DocumentedFunction e) ReaderOptions]
readerOptionsMembers =
[ property "abbreviations" ""
(pushSet pushText, readerAbbreviations)
(peekSet peekText, \opts x -> opts{ readerAbbreviations = x })
, property "columns" ""
(pushIntegral, readerColumns)
(peekIntegral, \opts x -> opts{ readerColumns = x })
, property "default_image_extension" ""
(pushText, readerDefaultImageExtension)
(peekText, \opts x -> opts{ readerDefaultImageExtension = x })
, property "extensions" ""
(pushString . show, readerExtensions)
(peekRead, \opts x -> opts{ readerExtensions = x })
, property "indented_code_classes" ""
(pushPandocList pushText, readerIndentedCodeClasses)
(peekList peekText, \opts x -> opts{ readerIndentedCodeClasses = x })
, property "strip_comments" ""
(pushBool, readerStripComments)
(peekBool, \opts x -> opts{ readerStripComments = x })
, property "standalone" ""
(pushBool, readerStandalone)
(peekBool, \opts x -> opts{ readerStandalone = x })
, property "tab_stop" ""
(pushIntegral, readerTabStop)
(peekIntegral, \opts x -> opts{ readerTabStop = x })
, property "track_changes" ""
(pushString . show, readerTrackChanges)
(peekRead, \opts x -> opts{ readerTrackChanges = x })
]
-- | Retrieves a 'ReaderOptions' object from a table on the stack, using
-- the default values for all missing fields.
--
-- Internally, this pushes the default reader options, sets each
-- key/value pair of the table in the userdata value, then retrieves the
-- object again. This will update all fields and complain about unknown
-- keys.
peekReaderOptionsTable :: LuaError e => Peeker e ReaderOptions
peekReaderOptionsTable idx = retrieving "ReaderOptions (table)" $ do
liftLua $ do
absidx <- absindex idx
pushUD typeReaderOptions def
let setFields = do
next absidx >>= \case
False -> return () -- all fields were copied
True -> do
pushvalue (nth 2) *> insert (nth 2)
settable (nth 4) -- set in userdata object
setFields
pushnil -- first key
setFields
peekUD typeReaderOptions top
instance Pushable ReaderOptions where
push = pushReaderOptions
|
