EngineInfo.hs


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

The #PangoEngineInfo structure contains information about a particular
engine. It contains the following fields:
-}

module GI.Pango.Structs.EngineInfo
    ( 

-- * Exported types
    EngineInfo(..)                          ,
    newZeroEngineInfo                       ,
    noEngineInfo                            ,


 -- * Properties
-- ** EngineType
    engineInfoReadEngineType                ,


-- ** Id
    engineInfoReadId                        ,


-- ** NScripts
    engineInfoReadNScripts                  ,


-- ** RenderType
    engineInfoReadRenderType                ,


-- ** Scripts
    engineInfoReadScripts                   ,




    ) 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 EngineInfo = EngineInfo (ForeignPtr EngineInfo)
-- | Construct a `EngineInfo` struct initialized to zero.
newZeroEngineInfo :: MonadIO m => m EngineInfo
newZeroEngineInfo = liftIO $ callocBytes 40 >>= wrapPtr EngineInfo

noEngineInfo :: Maybe EngineInfo
noEngineInfo = Nothing

engineInfoReadId :: EngineInfo -> IO T.Text
engineInfoReadId s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 0) :: IO CString
    val' <- cstringToText val
    return val'

engineInfoReadEngineType :: EngineInfo -> IO T.Text
engineInfoReadEngineType s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 8) :: IO CString
    val' <- cstringToText val
    return val'

engineInfoReadRenderType :: EngineInfo -> IO T.Text
engineInfoReadRenderType s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 16) :: IO CString
    val' <- cstringToText val
    return val'

engineInfoReadScripts :: EngineInfo -> IO EngineScriptInfo
engineInfoReadScripts s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 24) :: IO (Ptr EngineScriptInfo)
    val' <- (newPtr 16 EngineScriptInfo) val
    return val'

engineInfoReadNScripts :: EngineInfo -> IO Int32
engineInfoReadNScripts s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 32) :: IO Int32
    return val

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

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

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