AttrLanguage.hs


{- |
Copyright  : Will Thompson, Iñaki García Etxebarria and Jonas Platte
License    : LGPL-2.1
Maintainer : Iñaki García Etxebarria (garetxe@gmail.com)

The #PangoAttrLanguage structure is used to represent attributes that
are languages.
-}

module GI.Pango.Structs.AttrLanguage
    ( 

-- * Exported types
    AttrLanguage(..)                        ,
    newZeroAttrLanguage                     ,
    noAttrLanguage                          ,


 -- * Properties
-- ** Attr
    attrLanguageReadAttr                    ,


-- ** Value
    attrLanguageReadValue                   ,




    ) where

import Prelude ()
import Data.GI.Base.ShortPrelude

import qualified Data.Text as T
import qualified Data.ByteString.Char8 as B
import qualified Data.Map as Map

import GI.Pango.Types
import GI.Pango.Callbacks

newtype AttrLanguage = AttrLanguage (ForeignPtr AttrLanguage)
-- | Construct a `AttrLanguage` struct initialized to zero.
newZeroAttrLanguage :: MonadIO m => m AttrLanguage
newZeroAttrLanguage = liftIO $ callocBytes 24 >>= wrapPtr AttrLanguage

noAttrLanguage :: Maybe AttrLanguage
noAttrLanguage = Nothing

attrLanguageReadAttr :: AttrLanguage -> IO Attribute
attrLanguageReadAttr s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 0) :: IO (Ptr Attribute)
    val' <- (newPtr 16 Attribute) val
    return val'

attrLanguageReadValue :: AttrLanguage -> IO Language
attrLanguageReadValue s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 16) :: IO (Ptr Language)
    val' <- (newBoxed Language) val
    return val'

type family ResolveAttrLanguageMethod (t :: Symbol) (o :: *) :: * where
    ResolveAttrLanguageMethod l o = MethodResolutionFailed l o

instance (info ~ ResolveAttrLanguageMethod t AttrLanguage, MethodInfo info AttrLanguage p) => IsLabelProxy t (AttrLanguage -> p) where
    fromLabelProxy _ = overloadedMethod (MethodProxy :: MethodProxy info)

#if MIN_VERSION_base(4,9,0)
instance (info ~ ResolveAttrLanguageMethod t AttrLanguage, MethodInfo info AttrLanguage p) => IsLabel t (AttrLanguage -> p) where
    fromLabel _ = overloadedMethod (MethodProxy :: MethodProxy info)
#endif