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

The 'GI.Pango.Structs.AttrClass.AttrClass' structure stores the type and operations for
a particular type of attribute. The functions in this structure should
not be called directly. Instead, one should use the wrapper functions
provided for 'GI.Pango.Structs.Attribute.Attribute'.
-}

module GI.Pango.Structs.AttrClass
    ( 

-- * Exported types
    AttrClass(..)                           ,
    newZeroAttrClass                        ,
    noAttrClass                             ,


 -- * Properties
-- ** destroy #attr:destroy#
    attrClass_destroy                       ,
    clearAttrClassDestroy                   ,
    getAttrClassDestroy                     ,
    setAttrClassDestroy                     ,


-- ** equal #attr:equal#
    attrClass_equal                         ,
    clearAttrClassEqual                     ,
    getAttrClassEqual                       ,
    setAttrClassEqual                       ,


-- ** type #attr:type#
    attrClass_type                          ,
    getAttrClassType                        ,
    setAttrClassType                        ,




    ) where

import Data.GI.Base.ShortPrelude
import qualified Data.GI.Base.ShortPrelude as SP
import qualified Data.GI.Base.Overloading as O
import qualified Prelude as P

import qualified Data.GI.Base.Attributes as GI.Attributes
import qualified Data.GI.Base.ManagedPtr as B.ManagedPtr
import qualified Data.GI.Base.GError as B.GError
import qualified Data.GI.Base.GVariant as B.GVariant
import qualified Data.GI.Base.GParamSpec as B.GParamSpec
import qualified Data.GI.Base.CallStack as B.CallStack
import qualified Data.Text as T
import qualified Data.ByteString.Char8 as B
import qualified Data.Map as Map
import qualified Foreign.Ptr as FP

import qualified GI.Pango.Callbacks as Pango.Callbacks
import {-# SOURCE #-} qualified GI.Pango.Enums as Pango.Enums

newtype AttrClass = AttrClass (ManagedPtr AttrClass)
instance WrappedPtr AttrClass where
    wrappedPtrCalloc = callocBytes 32
    wrappedPtrCopy = \p -> withManagedPtr p (copyBytes 32 >=> wrapPtr AttrClass)
    wrappedPtrFree = Just ptr_to_g_free

-- | Construct a `AttrClass` struct initialized to zero.
newZeroAttrClass :: MonadIO m => m AttrClass
newZeroAttrClass = liftIO $ wrappedPtrCalloc >>= wrapPtr AttrClass

instance tag ~ 'AttrSet => Constructible AttrClass tag where
    new _ attrs = do
        o <- newZeroAttrClass
        GI.Attributes.set o attrs
        return o


noAttrClass :: Maybe AttrClass
noAttrClass = Nothing

getAttrClassType :: MonadIO m => AttrClass -> m Pango.Enums.AttrType
getAttrClassType s = liftIO $ withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 0) :: IO CUInt
    let val' = (toEnum . fromIntegral) val
    return val'

setAttrClassType :: MonadIO m => AttrClass -> Pango.Enums.AttrType -> m ()
setAttrClassType s val = liftIO $ withManagedPtr s $ \ptr -> do
    let val' = (fromIntegral . fromEnum) val
    poke (ptr `plusPtr` 0) (val' :: CUInt)

data AttrClassTypeFieldInfo
instance AttrInfo AttrClassTypeFieldInfo where
    type AttrAllowedOps AttrClassTypeFieldInfo = '[ 'AttrSet, 'AttrGet]
    type AttrSetTypeConstraint AttrClassTypeFieldInfo = (~) Pango.Enums.AttrType
    type AttrBaseTypeConstraint AttrClassTypeFieldInfo = (~) AttrClass
    type AttrGetType AttrClassTypeFieldInfo = Pango.Enums.AttrType
    type AttrLabel AttrClassTypeFieldInfo = "type"
    type AttrOrigin AttrClassTypeFieldInfo = AttrClass
    attrGet _ = getAttrClassType
    attrSet _ = setAttrClassType
    attrConstruct = undefined
    attrClear _ = undefined

attrClass_type :: AttrLabelProxy "type"
attrClass_type = AttrLabelProxy


getAttrClassDestroy :: MonadIO m => AttrClass -> m (Maybe Pango.Callbacks.AttrClassDestroyFieldCallback)
getAttrClassDestroy s = liftIO $ withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 16) :: IO (FunPtr Pango.Callbacks.C_AttrClassDestroyFieldCallback)
    result <- SP.convertFunPtrIfNonNull val $ \val' -> do
        let val'' = Pango.Callbacks.dynamic_AttrClassDestroyFieldCallback val'
        return val''
    return result

setAttrClassDestroy :: MonadIO m => AttrClass -> FunPtr Pango.Callbacks.C_AttrClassDestroyFieldCallback -> m ()
setAttrClassDestroy s val = liftIO $ withManagedPtr s $ \ptr -> do
    poke (ptr `plusPtr` 16) (val :: FunPtr Pango.Callbacks.C_AttrClassDestroyFieldCallback)

clearAttrClassDestroy :: MonadIO m => AttrClass -> m ()
clearAttrClassDestroy s = liftIO $ withManagedPtr s $ \ptr -> do
    poke (ptr `plusPtr` 16) (FP.nullFunPtr :: FunPtr Pango.Callbacks.C_AttrClassDestroyFieldCallback)

data AttrClassDestroyFieldInfo
instance AttrInfo AttrClassDestroyFieldInfo where
    type AttrAllowedOps AttrClassDestroyFieldInfo = '[ 'AttrSet, 'AttrGet, 'AttrClear]
    type AttrSetTypeConstraint AttrClassDestroyFieldInfo = (~) (FunPtr Pango.Callbacks.C_AttrClassDestroyFieldCallback)
    type AttrBaseTypeConstraint AttrClassDestroyFieldInfo = (~) AttrClass
    type AttrGetType AttrClassDestroyFieldInfo = Maybe Pango.Callbacks.AttrClassDestroyFieldCallback
    type AttrLabel AttrClassDestroyFieldInfo = "destroy"
    type AttrOrigin AttrClassDestroyFieldInfo = AttrClass
    attrGet _ = getAttrClassDestroy
    attrSet _ = setAttrClassDestroy
    attrConstruct = undefined
    attrClear _ = clearAttrClassDestroy

attrClass_destroy :: AttrLabelProxy "destroy"
attrClass_destroy = AttrLabelProxy


getAttrClassEqual :: MonadIO m => AttrClass -> m (Maybe Pango.Callbacks.AttrClassEqualFieldCallback)
getAttrClassEqual s = liftIO $ withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 24) :: IO (FunPtr Pango.Callbacks.C_AttrClassEqualFieldCallback)
    result <- SP.convertFunPtrIfNonNull val $ \val' -> do
        let val'' = Pango.Callbacks.dynamic_AttrClassEqualFieldCallback val'
        return val''
    return result

setAttrClassEqual :: MonadIO m => AttrClass -> FunPtr Pango.Callbacks.C_AttrClassEqualFieldCallback -> m ()
setAttrClassEqual s val = liftIO $ withManagedPtr s $ \ptr -> do
    poke (ptr `plusPtr` 24) (val :: FunPtr Pango.Callbacks.C_AttrClassEqualFieldCallback)

clearAttrClassEqual :: MonadIO m => AttrClass -> m ()
clearAttrClassEqual s = liftIO $ withManagedPtr s $ \ptr -> do
    poke (ptr `plusPtr` 24) (FP.nullFunPtr :: FunPtr Pango.Callbacks.C_AttrClassEqualFieldCallback)

data AttrClassEqualFieldInfo
instance AttrInfo AttrClassEqualFieldInfo where
    type AttrAllowedOps AttrClassEqualFieldInfo = '[ 'AttrSet, 'AttrGet, 'AttrClear]
    type AttrSetTypeConstraint AttrClassEqualFieldInfo = (~) (FunPtr Pango.Callbacks.C_AttrClassEqualFieldCallback)
    type AttrBaseTypeConstraint AttrClassEqualFieldInfo = (~) AttrClass
    type AttrGetType AttrClassEqualFieldInfo = Maybe Pango.Callbacks.AttrClassEqualFieldCallback
    type AttrLabel AttrClassEqualFieldInfo = "equal"
    type AttrOrigin AttrClassEqualFieldInfo = AttrClass
    attrGet _ = getAttrClassEqual
    attrSet _ = setAttrClassEqual
    attrConstruct = undefined
    attrClear _ = clearAttrClassEqual

attrClass_equal :: AttrLabelProxy "equal"
attrClass_equal = AttrLabelProxy



instance O.HasAttributeList AttrClass
type instance O.AttributeList AttrClass = AttrClassAttributeList
type AttrClassAttributeList = ('[ '("type", AttrClassTypeFieldInfo), '("destroy", AttrClassDestroyFieldInfo), '("equal", AttrClassEqualFieldInfo)] :: [(Symbol, *)])

type family ResolveAttrClassMethod (t :: Symbol) (o :: *) :: * where
    ResolveAttrClassMethod l o = O.MethodResolutionFailed l o

instance (info ~ ResolveAttrClassMethod t AttrClass, O.MethodInfo info AttrClass p) => O.IsLabelProxy t (AttrClass -> p) where
    fromLabelProxy _ = O.overloadedMethod (O.MethodProxy :: O.MethodProxy info)

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