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

'GI.Gio.Objects.MenuModel.MenuModel' represents the contents of a menu -- an ordered list of
menu items. The items are associated with actions, which can be
activated through them. Items can be grouped in sections, and may
have submenus associated with them. Both items and sections usually
have some representation data, such as labels or icons. The type of
the associated action (ie whether it is stateful, and what kind of
state it has) can influence the representation of the item.

The conceptual model of menus in 'GI.Gio.Objects.MenuModel.MenuModel' is hierarchical:
sections and submenus are again represented by @/GMenuModels/@.
Menus themselves do not define their own roles. Rather, the role
of a particular 'GI.Gio.Objects.MenuModel.MenuModel' is defined by the item that references
it (or, in the case of the \'root\' menu, is defined by the context
in which it is used).

As an example, consider the visible portions of this menu:

## An example menu # {@/menu/@-example}

<<http://developer.gnome.org/gio/stable/menu-example.png>>

There are 8 \"menus\" visible in the screenshot: one menubar, two
submenus and 5 sections:

* the toplevel menubar (containing 4 items)
* the View submenu (containing 3 sections)
* the first section of the View submenu (containing 2 items)
* the second section of the View submenu (containing 1 item)
* the final section of the View submenu (containing 1 item)
* the Highlight Mode submenu (containing 2 sections)
* the Sources section (containing 2 items)
* the Markup section (containing 2 items)


The [example][menu-model] illustrates the conceptual connection between
these 8 menus. Each large block in the figure represents a menu and the
smaller blocks within the large block represent items in that menu. Some
items contain references to other menus.

## A menu example # {@/menu/@-model}

<<http://developer.gnome.org/gio/stable/menu-model.png>>

Notice that the separators visible in the [example][menu-example]
appear nowhere in the [menu model][menu-model]. This is because
separators are not explicitly represented in the menu model. Instead,
a separator is inserted between any two non-empty sections of a menu.
Section items can have labels just like any other item. In that case,
a display system may show a section header instead of a separator.

The motivation for this abstract model of application controls is
that modern user interfaces tend to make these controls available
outside the application. Examples include global menus, jumplists,
dash boards, etc. To support such uses, it is necessary to \'export\'
information about actions and their representation in menus, which
is exactly what the [GActionGroup exporter][gio-GActionGroup-exporter]
and the [GMenuModel exporter][gio-GMenuModel-exporter] do for
'GI.Gio.Interfaces.ActionGroup.ActionGroup' and 'GI.Gio.Objects.MenuModel.MenuModel'. The client-side counterparts to
make use of the exported information are 'GI.Gio.Objects.DBusActionGroup.DBusActionGroup' and
'GI.Gio.Objects.DBusMenuModel.DBusMenuModel'.

The API of 'GI.Gio.Objects.MenuModel.MenuModel' is very generic, with iterators for the
attributes and links of an item, see 'GI.Gio.Objects.MenuModel.menuModelIterateItemAttributes'
and 'GI.Gio.Objects.MenuModel.menuModelIterateItemLinks'. The \'standard\' attributes and
link types have predefined names: 'GI.Gio.Constants.MENU_ATTRIBUTE_LABEL',
'GI.Gio.Constants.MENU_ATTRIBUTE_ACTION', 'GI.Gio.Constants.MENU_ATTRIBUTE_TARGET', 'GI.Gio.Constants.MENU_LINK_SECTION'
and 'GI.Gio.Constants.MENU_LINK_SUBMENU'.

Items in a 'GI.Gio.Objects.MenuModel.MenuModel' represent active controls if they refer to
an action that can get activated when the user interacts with the
menu item. The reference to the action is encoded by the string id
in the 'GI.Gio.Constants.MENU_ATTRIBUTE_ACTION' attribute. An action id uniquely
identifies an action in an action group. Which action group(s) provide
actions depends on the context in which the menu model is used.
E.g. when the model is exported as the application menu of a
@/GtkApplication/@, actions can be application-wide or window-specific
(and thus come from two different action groups). By convention, the
application-wide actions have names that start with \"app.\", while the
names of window-specific actions start with \"win.\".

While a wide variety of stateful actions is possible, the following
is the minimum that is expected to be supported by all users of exported
menu information:

* an action with no parameter type and no state
* an action with no parameter type and boolean state
* an action with string parameter type and string state


== Stateless

A stateless action typically corresponds to an ordinary menu item.

Selecting such a menu item will activate the action (with no parameter).

== Boolean State

An action with a boolean state will most typically be used with a \"toggle\"
or \"switch\" menu item. The state can be set directly, but activating the
action (with no parameter) results in the state being toggled.

Selecting a toggle menu item will activate the action. The menu item should
be rendered as \"checked\" when the state is true.

== String Parameter and State

Actions with string parameters and state will most typically be used to
represent an enumerated choice over the items available for a group of
radio menu items. Activating the action with a string parameter is
equivalent to setting that parameter as the state.

Radio menu items, in addition to being associated with the action, will
have a target value. Selecting that menu item will result in activation
of the action with the target value as the parameter. The menu item should
be rendered as \"selected\" when the state of the action is equal to the
target value of the menu item.

/Since: 2.32/
-}

#define ENABLE_OVERLOADING (MIN_VERSION_haskell_gi_overloading(1,0,0) \
       && !defined(__HADDOCK_VERSION__))

module GI.Gio.Objects.MenuModel
    (

-- * Exported types
    MenuModel(..)                           ,
    IsMenuModel                             ,
    toMenuModel                             ,
    noMenuModel                             ,


 -- * Methods
-- ** getItemAttributeValue #method:getItemAttributeValue#

#if ENABLE_OVERLOADING
    MenuModelGetItemAttributeValueMethodInfo,
#endif
    menuModelGetItemAttributeValue          ,


-- ** getItemLink #method:getItemLink#

#if ENABLE_OVERLOADING
    MenuModelGetItemLinkMethodInfo          ,
#endif
    menuModelGetItemLink                    ,


-- ** getNItems #method:getNItems#

#if ENABLE_OVERLOADING
    MenuModelGetNItemsMethodInfo            ,
#endif
    menuModelGetNItems                      ,


-- ** isMutable #method:isMutable#

#if ENABLE_OVERLOADING
    MenuModelIsMutableMethodInfo            ,
#endif
    menuModelIsMutable                      ,


-- ** itemsChanged #method:itemsChanged#

#if ENABLE_OVERLOADING
    MenuModelItemsChangedMethodInfo         ,
#endif
    menuModelItemsChanged                   ,


-- ** iterateItemAttributes #method:iterateItemAttributes#

#if ENABLE_OVERLOADING
    MenuModelIterateItemAttributesMethodInfo,
#endif
    menuModelIterateItemAttributes          ,


-- ** iterateItemLinks #method:iterateItemLinks#

#if ENABLE_OVERLOADING
    MenuModelIterateItemLinksMethodInfo     ,
#endif
    menuModelIterateItemLinks               ,




 -- * Signals
-- ** itemsChanged #signal:itemsChanged#

    C_MenuModelItemsChangedCallback         ,
    MenuModelItemsChangedCallback           ,
#if ENABLE_OVERLOADING
    MenuModelItemsChangedSignalInfo         ,
#endif
    afterMenuModelItemsChanged              ,
    genClosure_MenuModelItemsChanged        ,
    mk_MenuModelItemsChangedCallback        ,
    noMenuModelItemsChangedCallback         ,
    onMenuModelItemsChanged                 ,
    wrap_MenuModelItemsChangedCallback      ,




    ) 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.GValue as B.GValue
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.GLib.Structs.VariantType as GLib.VariantType
import qualified GI.GObject.Objects.Object as GObject.Object
import {-# SOURCE #-} qualified GI.Gio.Objects.MenuAttributeIter as Gio.MenuAttributeIter
import {-# SOURCE #-} qualified GI.Gio.Objects.MenuLinkIter as Gio.MenuLinkIter

-- | Memory-managed wrapper type.
newtype MenuModel = MenuModel (ManagedPtr MenuModel)
foreign import ccall "g_menu_model_get_type"
    c_g_menu_model_get_type :: IO GType

instance GObject MenuModel where
    gobjectType _ = c_g_menu_model_get_type


-- | Type class for types which can be safely cast to `MenuModel`, for instance with `toMenuModel`.
class GObject o => IsMenuModel o
#if MIN_VERSION_base(4,9,0)
instance {-# OVERLAPPABLE #-} (GObject a, O.UnknownAncestorError MenuModel a) =>
    IsMenuModel a
#endif
instance IsMenuModel MenuModel
instance GObject.Object.IsObject MenuModel

-- | Cast to `MenuModel`, for types for which this is known to be safe. For general casts, use `Data.GI.Base.ManagedPtr.castTo`.
toMenuModel :: (MonadIO m, IsMenuModel o) => o -> m MenuModel
toMenuModel = liftIO . unsafeCastTo MenuModel

-- | A convenience alias for `Nothing` :: `Maybe` `MenuModel`.
noMenuModel :: Maybe MenuModel
noMenuModel = Nothing

#if ENABLE_OVERLOADING
type family ResolveMenuModelMethod (t :: Symbol) (o :: *) :: * where
    ResolveMenuModelMethod "bindProperty" o = GObject.Object.ObjectBindPropertyMethodInfo
    ResolveMenuModelMethod "bindPropertyFull" o = GObject.Object.ObjectBindPropertyFullMethodInfo
    ResolveMenuModelMethod "forceFloating" o = GObject.Object.ObjectForceFloatingMethodInfo
    ResolveMenuModelMethod "freezeNotify" o = GObject.Object.ObjectFreezeNotifyMethodInfo
    ResolveMenuModelMethod "getv" o = GObject.Object.ObjectGetvMethodInfo
    ResolveMenuModelMethod "isFloating" o = GObject.Object.ObjectIsFloatingMethodInfo
    ResolveMenuModelMethod "isMutable" o = MenuModelIsMutableMethodInfo
    ResolveMenuModelMethod "itemsChanged" o = MenuModelItemsChangedMethodInfo
    ResolveMenuModelMethod "iterateItemAttributes" o = MenuModelIterateItemAttributesMethodInfo
    ResolveMenuModelMethod "iterateItemLinks" o = MenuModelIterateItemLinksMethodInfo
    ResolveMenuModelMethod "notify" o = GObject.Object.ObjectNotifyMethodInfo
    ResolveMenuModelMethod "notifyByPspec" o = GObject.Object.ObjectNotifyByPspecMethodInfo
    ResolveMenuModelMethod "ref" o = GObject.Object.ObjectRefMethodInfo
    ResolveMenuModelMethod "refSink" o = GObject.Object.ObjectRefSinkMethodInfo
    ResolveMenuModelMethod "runDispose" o = GObject.Object.ObjectRunDisposeMethodInfo
    ResolveMenuModelMethod "stealData" o = GObject.Object.ObjectStealDataMethodInfo
    ResolveMenuModelMethod "stealQdata" o = GObject.Object.ObjectStealQdataMethodInfo
    ResolveMenuModelMethod "thawNotify" o = GObject.Object.ObjectThawNotifyMethodInfo
    ResolveMenuModelMethod "unref" o = GObject.Object.ObjectUnrefMethodInfo
    ResolveMenuModelMethod "watchClosure" o = GObject.Object.ObjectWatchClosureMethodInfo
    ResolveMenuModelMethod "getData" o = GObject.Object.ObjectGetDataMethodInfo
    ResolveMenuModelMethod "getItemAttributeValue" o = MenuModelGetItemAttributeValueMethodInfo
    ResolveMenuModelMethod "getItemLink" o = MenuModelGetItemLinkMethodInfo
    ResolveMenuModelMethod "getNItems" o = MenuModelGetNItemsMethodInfo
    ResolveMenuModelMethod "getProperty" o = GObject.Object.ObjectGetPropertyMethodInfo
    ResolveMenuModelMethod "getQdata" o = GObject.Object.ObjectGetQdataMethodInfo
    ResolveMenuModelMethod "setData" o = GObject.Object.ObjectSetDataMethodInfo
    ResolveMenuModelMethod "setProperty" o = GObject.Object.ObjectSetPropertyMethodInfo
    ResolveMenuModelMethod l o = O.MethodResolutionFailed l o

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

#if MIN_VERSION_base(4,9,0)
instance (info ~ ResolveMenuModelMethod t MenuModel, O.MethodInfo info MenuModel p) => O.IsLabel t (MenuModel -> p) where
#if MIN_VERSION_base(4,10,0)
    fromLabel = O.overloadedMethod (O.MethodProxy :: O.MethodProxy info)
#else
    fromLabel _ = O.overloadedMethod (O.MethodProxy :: O.MethodProxy info)
#endif
#endif

#endif

-- signal MenuModel::items-changed
{- |
Emitted when a change has occured to the menu.

The only changes that can occur to a menu is that items are removed
or added.  Items may not change (except by being removed and added
back in the same location).  This signal is capable of describing
both of those changes (at the same time).

The signal means that starting at the index /@position@/, /@removed@/
items were removed and /@added@/ items were added in their place.  If
/@removed@/ is zero then only items were added.  If /@added@/ is zero
then only items were removed.

As an example, if the menu contains items a, b, c, d (in that
order) and the signal (2, 1, 3) occurs then the new composition of
the menu will be a, b, _, _, _, d (with each _ representing some
new item).

Signal handlers may query the model (particularly the added items)
and expect to see the results of the modification that is being
reported.  The signal is emitted after the modification.
-}
type MenuModelItemsChangedCallback =
    Int32
    {- ^ /@position@/: the position of the change -}
    -> Int32
    {- ^ /@removed@/: the number of items removed -}
    -> Int32
    {- ^ /@added@/: the number of items added -}
    -> IO ()

-- | A convenience synonym for @`Nothing` :: `Maybe` `MenuModelItemsChangedCallback`@.
noMenuModelItemsChangedCallback :: Maybe MenuModelItemsChangedCallback
noMenuModelItemsChangedCallback = Nothing

-- | Type for the callback on the (unwrapped) C side.
type C_MenuModelItemsChangedCallback =
    Ptr () ->                               -- object
    Int32 ->
    Int32 ->
    Int32 ->
    Ptr () ->                               -- user_data
    IO ()

-- | Generate a function pointer callable from C code, from a `C_MenuModelItemsChangedCallback`.
foreign import ccall "wrapper"
    mk_MenuModelItemsChangedCallback :: C_MenuModelItemsChangedCallback -> IO (FunPtr C_MenuModelItemsChangedCallback)

-- | Wrap the callback into a `Closure`.
genClosure_MenuModelItemsChanged :: MenuModelItemsChangedCallback -> IO Closure
genClosure_MenuModelItemsChanged cb = do
    let cb' = wrap_MenuModelItemsChangedCallback cb
    mk_MenuModelItemsChangedCallback cb' >>= newCClosure


-- | Wrap a `MenuModelItemsChangedCallback` into a `C_MenuModelItemsChangedCallback`.
wrap_MenuModelItemsChangedCallback ::
    MenuModelItemsChangedCallback ->
    C_MenuModelItemsChangedCallback
wrap_MenuModelItemsChangedCallback _cb _ position removed added _ = do
    _cb  position removed added


{- |
Connect a signal handler for the “@items-changed@” signal, to be run before the default handler.
When <https://github.com/haskell-gi/haskell-gi/wiki/Overloading overloading> is enabled, this is equivalent to

@
'Data.GI.Base.Signals.on' menuModel #itemsChanged callback
@
-}
onMenuModelItemsChanged :: (IsMenuModel a, MonadIO m) => a -> MenuModelItemsChangedCallback -> m SignalHandlerId
onMenuModelItemsChanged obj cb = liftIO $ do
    let cb' = wrap_MenuModelItemsChangedCallback cb
    cb'' <- mk_MenuModelItemsChangedCallback cb'
    connectSignalFunPtr obj "items-changed" cb'' SignalConnectBefore

{- |
Connect a signal handler for the “@items-changed@” signal, to be run after the default handler.
When <https://github.com/haskell-gi/haskell-gi/wiki/Overloading overloading> is enabled, this is equivalent to

@
'Data.GI.Base.Signals.after' menuModel #itemsChanged callback
@
-}
afterMenuModelItemsChanged :: (IsMenuModel a, MonadIO m) => a -> MenuModelItemsChangedCallback -> m SignalHandlerId
afterMenuModelItemsChanged obj cb = liftIO $ do
    let cb' = wrap_MenuModelItemsChangedCallback cb
    cb'' <- mk_MenuModelItemsChangedCallback cb'
    connectSignalFunPtr obj "items-changed" cb'' SignalConnectAfter


#if ENABLE_OVERLOADING
instance O.HasAttributeList MenuModel
type instance O.AttributeList MenuModel = MenuModelAttributeList
type MenuModelAttributeList = ('[ ] :: [(Symbol, *)])
#endif

#if ENABLE_OVERLOADING
#endif

#if ENABLE_OVERLOADING
data MenuModelItemsChangedSignalInfo
instance SignalInfo MenuModelItemsChangedSignalInfo where
    type HaskellCallbackType MenuModelItemsChangedSignalInfo = MenuModelItemsChangedCallback
    connectSignal _ obj cb connectMode = do
        let cb' = wrap_MenuModelItemsChangedCallback cb
        cb'' <- mk_MenuModelItemsChangedCallback cb'
        connectSignalFunPtr obj "items-changed" cb'' connectMode

type instance O.SignalList MenuModel = MenuModelSignalList
type MenuModelSignalList = ('[ '("itemsChanged", MenuModelItemsChangedSignalInfo), '("notify", GObject.Object.ObjectNotifySignalInfo)] :: [(Symbol, *)])

#endif

-- method MenuModel::get_item_attribute_value
-- method type : OrdinaryMethod
-- Args : [Arg {argCName = "model", argType = TInterface (Name {namespace = "Gio", name = "MenuModel"}), direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "a #GMenuModel", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing},Arg {argCName = "item_index", argType = TBasicType TInt, direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "the index of the item", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing},Arg {argCName = "attribute", argType = TBasicType TUTF8, direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "the attribute to query", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing},Arg {argCName = "expected_type", argType = TInterface (Name {namespace = "GLib", name = "VariantType"}), direction = DirectionIn, mayBeNull = True, argDoc = Documentation {rawDocText = Just "the expected type of the attribute, or\n    %NULL", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : Just TVariant
-- throws : False
-- Skip return : False

foreign import ccall "g_menu_model_get_item_attribute_value" g_menu_model_get_item_attribute_value ::
    Ptr MenuModel ->                        -- model : TInterface (Name {namespace = "Gio", name = "MenuModel"})
    Int32 ->                                -- item_index : TBasicType TInt
    CString ->                              -- attribute : TBasicType TUTF8
    Ptr GLib.VariantType.VariantType ->     -- expected_type : TInterface (Name {namespace = "GLib", name = "VariantType"})
    IO (Ptr GVariant)

{- |
Queries the item at position /@itemIndex@/ in /@model@/ for the attribute
specified by /@attribute@/.

If /@expectedType@/ is non-'Nothing' then it specifies the expected type of
the attribute.  If it is 'Nothing' then any type will be accepted.

If the attribute exists and matches /@expectedType@/ (or if the
expected type is unspecified) then the value is returned.

If the attribute does not exist, or does not match the expected type
then 'Nothing' is returned.

/Since: 2.32/
-}
menuModelGetItemAttributeValue ::
    (B.CallStack.HasCallStack, MonadIO m, IsMenuModel a) =>
    a
    {- ^ /@model@/: a 'GI.Gio.Objects.MenuModel.MenuModel' -}
    -> Int32
    {- ^ /@itemIndex@/: the index of the item -}
    -> T.Text
    {- ^ /@attribute@/: the attribute to query -}
    -> Maybe (GLib.VariantType.VariantType)
    {- ^ /@expectedType@/: the expected type of the attribute, or
    'Nothing' -}
    -> m GVariant
    {- ^ __Returns:__ the value of the attribute -}
menuModelGetItemAttributeValue model itemIndex attribute expectedType = liftIO $ do
    model' <- unsafeManagedPtrCastPtr model
    attribute' <- textToCString attribute
    maybeExpectedType <- case expectedType of
        Nothing -> return nullPtr
        Just jExpectedType -> do
            jExpectedType' <- unsafeManagedPtrGetPtr jExpectedType
            return jExpectedType'
    result <- g_menu_model_get_item_attribute_value model' itemIndex attribute' maybeExpectedType
    checkUnexpectedReturnNULL "menuModelGetItemAttributeValue" result
    result' <- B.GVariant.wrapGVariantPtr result
    touchManagedPtr model
    whenJust expectedType touchManagedPtr
    freeMem attribute'
    return result'

#if ENABLE_OVERLOADING
data MenuModelGetItemAttributeValueMethodInfo
instance (signature ~ (Int32 -> T.Text -> Maybe (GLib.VariantType.VariantType) -> m GVariant), MonadIO m, IsMenuModel a) => O.MethodInfo MenuModelGetItemAttributeValueMethodInfo a signature where
    overloadedMethod _ = menuModelGetItemAttributeValue

#endif

-- method MenuModel::get_item_link
-- method type : OrdinaryMethod
-- Args : [Arg {argCName = "model", argType = TInterface (Name {namespace = "Gio", name = "MenuModel"}), direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "a #GMenuModel", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing},Arg {argCName = "item_index", argType = TBasicType TInt, direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "the index of the item", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing},Arg {argCName = "link", argType = TBasicType TUTF8, direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "the link to query", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : Just (TInterface (Name {namespace = "Gio", name = "MenuModel"}))
-- throws : False
-- Skip return : False

foreign import ccall "g_menu_model_get_item_link" g_menu_model_get_item_link ::
    Ptr MenuModel ->                        -- model : TInterface (Name {namespace = "Gio", name = "MenuModel"})
    Int32 ->                                -- item_index : TBasicType TInt
    CString ->                              -- link : TBasicType TUTF8
    IO (Ptr MenuModel)

{- |
Queries the item at position /@itemIndex@/ in /@model@/ for the link
specified by /@link@/.

If the link exists, the linked 'GI.Gio.Objects.MenuModel.MenuModel' is returned.  If the link
does not exist, 'Nothing' is returned.

/Since: 2.32/
-}
menuModelGetItemLink ::
    (B.CallStack.HasCallStack, MonadIO m, IsMenuModel a) =>
    a
    {- ^ /@model@/: a 'GI.Gio.Objects.MenuModel.MenuModel' -}
    -> Int32
    {- ^ /@itemIndex@/: the index of the item -}
    -> T.Text
    {- ^ /@link@/: the link to query -}
    -> m MenuModel
    {- ^ __Returns:__ the linked 'GI.Gio.Objects.MenuModel.MenuModel', or 'Nothing' -}
menuModelGetItemLink model itemIndex link = liftIO $ do
    model' <- unsafeManagedPtrCastPtr model
    link' <- textToCString link
    result <- g_menu_model_get_item_link model' itemIndex link'
    checkUnexpectedReturnNULL "menuModelGetItemLink" result
    result' <- (wrapObject MenuModel) result
    touchManagedPtr model
    freeMem link'
    return result'

#if ENABLE_OVERLOADING
data MenuModelGetItemLinkMethodInfo
instance (signature ~ (Int32 -> T.Text -> m MenuModel), MonadIO m, IsMenuModel a) => O.MethodInfo MenuModelGetItemLinkMethodInfo a signature where
    overloadedMethod _ = menuModelGetItemLink

#endif

-- method MenuModel::get_n_items
-- method type : OrdinaryMethod
-- Args : [Arg {argCName = "model", argType = TInterface (Name {namespace = "Gio", name = "MenuModel"}), direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "a #GMenuModel", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : Just (TBasicType TInt)
-- throws : False
-- Skip return : False

foreign import ccall "g_menu_model_get_n_items" g_menu_model_get_n_items ::
    Ptr MenuModel ->                        -- model : TInterface (Name {namespace = "Gio", name = "MenuModel"})
    IO Int32

{- |
Query the number of items in /@model@/.

/Since: 2.32/
-}
menuModelGetNItems ::
    (B.CallStack.HasCallStack, MonadIO m, IsMenuModel a) =>
    a
    {- ^ /@model@/: a 'GI.Gio.Objects.MenuModel.MenuModel' -}
    -> m Int32
    {- ^ __Returns:__ the number of items -}
menuModelGetNItems model = liftIO $ do
    model' <- unsafeManagedPtrCastPtr model
    result <- g_menu_model_get_n_items model'
    touchManagedPtr model
    return result

#if ENABLE_OVERLOADING
data MenuModelGetNItemsMethodInfo
instance (signature ~ (m Int32), MonadIO m, IsMenuModel a) => O.MethodInfo MenuModelGetNItemsMethodInfo a signature where
    overloadedMethod _ = menuModelGetNItems

#endif

-- method MenuModel::is_mutable
-- method type : OrdinaryMethod
-- Args : [Arg {argCName = "model", argType = TInterface (Name {namespace = "Gio", name = "MenuModel"}), direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "a #GMenuModel", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : Just (TBasicType TBoolean)
-- throws : False
-- Skip return : False

foreign import ccall "g_menu_model_is_mutable" g_menu_model_is_mutable ::
    Ptr MenuModel ->                        -- model : TInterface (Name {namespace = "Gio", name = "MenuModel"})
    IO CInt

{- |
Queries if /@model@/ is mutable.

An immutable 'GI.Gio.Objects.MenuModel.MenuModel' will never emit the 'GI.Gio.Objects.MenuModel.MenuModel'::@/items-changed/@
signal. Consumers of the model may make optimisations accordingly.

/Since: 2.32/
-}
menuModelIsMutable ::
    (B.CallStack.HasCallStack, MonadIO m, IsMenuModel a) =>
    a
    {- ^ /@model@/: a 'GI.Gio.Objects.MenuModel.MenuModel' -}
    -> m Bool
    {- ^ __Returns:__ 'True' if the model is mutable (ie: \"items-changed\" may be
    emitted). -}
menuModelIsMutable model = liftIO $ do
    model' <- unsafeManagedPtrCastPtr model
    result <- g_menu_model_is_mutable model'
    let result' = (/= 0) result
    touchManagedPtr model
    return result'

#if ENABLE_OVERLOADING
data MenuModelIsMutableMethodInfo
instance (signature ~ (m Bool), MonadIO m, IsMenuModel a) => O.MethodInfo MenuModelIsMutableMethodInfo a signature where
    overloadedMethod _ = menuModelIsMutable

#endif

-- method MenuModel::items_changed
-- method type : OrdinaryMethod
-- Args : [Arg {argCName = "model", argType = TInterface (Name {namespace = "Gio", name = "MenuModel"}), direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "a #GMenuModel", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing},Arg {argCName = "position", argType = TBasicType TInt, direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "the position of the change", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing},Arg {argCName = "removed", argType = TBasicType TInt, direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "the number of items removed", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing},Arg {argCName = "added", argType = TBasicType TInt, direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "the number of items added", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : Nothing
-- throws : False
-- Skip return : False

foreign import ccall "g_menu_model_items_changed" g_menu_model_items_changed ::
    Ptr MenuModel ->                        -- model : TInterface (Name {namespace = "Gio", name = "MenuModel"})
    Int32 ->                                -- position : TBasicType TInt
    Int32 ->                                -- removed : TBasicType TInt
    Int32 ->                                -- added : TBasicType TInt
    IO ()

{- |
Requests emission of the 'GI.Gio.Objects.MenuModel.MenuModel'::@/items-changed/@ signal on /@model@/.

This function should never be called except by 'GI.Gio.Objects.MenuModel.MenuModel'
subclasses.  Any other calls to this function will very likely lead
to a violation of the interface of the model.

The implementation should update its internal representation of the
menu before emitting the signal.  The implementation should further
expect to receive queries about the new state of the menu (and
particularly added menu items) while signal handlers are running.

The implementation must dispatch this call directly from a mainloop
entry and not in response to calls -- particularly those from the
'GI.Gio.Objects.MenuModel.MenuModel' API.  Said another way: the menu must not change while
user code is running without returning to the mainloop.

/Since: 2.32/
-}
menuModelItemsChanged ::
    (B.CallStack.HasCallStack, MonadIO m, IsMenuModel a) =>
    a
    {- ^ /@model@/: a 'GI.Gio.Objects.MenuModel.MenuModel' -}
    -> Int32
    {- ^ /@position@/: the position of the change -}
    -> Int32
    {- ^ /@removed@/: the number of items removed -}
    -> Int32
    {- ^ /@added@/: the number of items added -}
    -> m ()
menuModelItemsChanged model position removed added = liftIO $ do
    model' <- unsafeManagedPtrCastPtr model
    g_menu_model_items_changed model' position removed added
    touchManagedPtr model
    return ()

#if ENABLE_OVERLOADING
data MenuModelItemsChangedMethodInfo
instance (signature ~ (Int32 -> Int32 -> Int32 -> m ()), MonadIO m, IsMenuModel a) => O.MethodInfo MenuModelItemsChangedMethodInfo a signature where
    overloadedMethod _ = menuModelItemsChanged

#endif

-- method MenuModel::iterate_item_attributes
-- method type : OrdinaryMethod
-- Args : [Arg {argCName = "model", argType = TInterface (Name {namespace = "Gio", name = "MenuModel"}), direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "a #GMenuModel", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing},Arg {argCName = "item_index", argType = TBasicType TInt, direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "the index of the item", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : Just (TInterface (Name {namespace = "Gio", name = "MenuAttributeIter"}))
-- throws : False
-- Skip return : False

foreign import ccall "g_menu_model_iterate_item_attributes" g_menu_model_iterate_item_attributes ::
    Ptr MenuModel ->                        -- model : TInterface (Name {namespace = "Gio", name = "MenuModel"})
    Int32 ->                                -- item_index : TBasicType TInt
    IO (Ptr Gio.MenuAttributeIter.MenuAttributeIter)

{- |
Creates a 'GI.Gio.Objects.MenuAttributeIter.MenuAttributeIter' to iterate over the attributes of
the item at position /@itemIndex@/ in /@model@/.

You must free the iterator with 'GI.GObject.Objects.Object.objectUnref' when you are done.

/Since: 2.32/
-}
menuModelIterateItemAttributes ::
    (B.CallStack.HasCallStack, MonadIO m, IsMenuModel a) =>
    a
    {- ^ /@model@/: a 'GI.Gio.Objects.MenuModel.MenuModel' -}
    -> Int32
    {- ^ /@itemIndex@/: the index of the item -}
    -> m Gio.MenuAttributeIter.MenuAttributeIter
    {- ^ __Returns:__ a new 'GI.Gio.Objects.MenuAttributeIter.MenuAttributeIter' -}
menuModelIterateItemAttributes model itemIndex = liftIO $ do
    model' <- unsafeManagedPtrCastPtr model
    result <- g_menu_model_iterate_item_attributes model' itemIndex
    checkUnexpectedReturnNULL "menuModelIterateItemAttributes" result
    result' <- (wrapObject Gio.MenuAttributeIter.MenuAttributeIter) result
    touchManagedPtr model
    return result'

#if ENABLE_OVERLOADING
data MenuModelIterateItemAttributesMethodInfo
instance (signature ~ (Int32 -> m Gio.MenuAttributeIter.MenuAttributeIter), MonadIO m, IsMenuModel a) => O.MethodInfo MenuModelIterateItemAttributesMethodInfo a signature where
    overloadedMethod _ = menuModelIterateItemAttributes

#endif

-- method MenuModel::iterate_item_links
-- method type : OrdinaryMethod
-- Args : [Arg {argCName = "model", argType = TInterface (Name {namespace = "Gio", name = "MenuModel"}), direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "a #GMenuModel", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing},Arg {argCName = "item_index", argType = TBasicType TInt, direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "the index of the item", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : Just (TInterface (Name {namespace = "Gio", name = "MenuLinkIter"}))
-- throws : False
-- Skip return : False

foreign import ccall "g_menu_model_iterate_item_links" g_menu_model_iterate_item_links ::
    Ptr MenuModel ->                        -- model : TInterface (Name {namespace = "Gio", name = "MenuModel"})
    Int32 ->                                -- item_index : TBasicType TInt
    IO (Ptr Gio.MenuLinkIter.MenuLinkIter)

{- |
Creates a 'GI.Gio.Objects.MenuLinkIter.MenuLinkIter' to iterate over the links of the item at
position /@itemIndex@/ in /@model@/.

You must free the iterator with 'GI.GObject.Objects.Object.objectUnref' when you are done.

/Since: 2.32/
-}
menuModelIterateItemLinks ::
    (B.CallStack.HasCallStack, MonadIO m, IsMenuModel a) =>
    a
    {- ^ /@model@/: a 'GI.Gio.Objects.MenuModel.MenuModel' -}
    -> Int32
    {- ^ /@itemIndex@/: the index of the item -}
    -> m Gio.MenuLinkIter.MenuLinkIter
    {- ^ __Returns:__ a new 'GI.Gio.Objects.MenuLinkIter.MenuLinkIter' -}
menuModelIterateItemLinks model itemIndex = liftIO $ do
    model' <- unsafeManagedPtrCastPtr model
    result <- g_menu_model_iterate_item_links model' itemIndex
    checkUnexpectedReturnNULL "menuModelIterateItemLinks" result
    result' <- (wrapObject Gio.MenuLinkIter.MenuLinkIter) result
    touchManagedPtr model
    return result'

#if ENABLE_OVERLOADING
data MenuModelIterateItemLinksMethodInfo
instance (signature ~ (Int32 -> m Gio.MenuLinkIter.MenuLinkIter), MonadIO m, IsMenuModel a) => O.MethodInfo MenuModelIterateItemLinksMethodInfo a signature where
    overloadedMethod _ = menuModelIterateItemLinks

#endif