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use crate::ListModel;
use glib::subclass::prelude::*;
use glib::translate::*;
use glib::{Cast, IsA, ObjectExt};
use once_cell::sync::Lazy;
pub trait ListModelImpl: ObjectImpl {
#[doc(alias = "get_item_type")]
fn item_type(&self, list_model: &Self::Type) -> glib::Type;
#[doc(alias = "get_n_items")]
fn n_items(&self, list_model: &Self::Type) -> u32;
#[doc(alias = "get_item")]
fn item(&self, list_model: &Self::Type, position: u32) -> Option<glib::Object>;
}
pub trait ListModelImplExt: ObjectSubclass {
fn parent_item_type(&self, list_model: &Self::Type) -> glib::Type;
fn parent_n_items(&self, list_model: &Self::Type) -> u32;
fn parent_item(&self, list_model: &Self::Type, position: u32) -> Option<glib::Object>;
}
impl<T: ListModelImpl> ListModelImplExt for T {
fn parent_item_type(&self, list_model: &Self::Type) -> glib::Type {
unsafe {
let type_data = Self::type_data();
let parent_iface = type_data.as_ref().parent_interface::<ListModel>()
as *const ffi::GListModelInterface;
let func = (*parent_iface)
.get_item_type
.expect("no parent \"item_type\" implementation");
let ret = func(list_model.unsafe_cast_ref::<ListModel>().to_glib_none().0);
from_glib(ret)
}
}
fn parent_n_items(&self, list_model: &Self::Type) -> u32 {
unsafe {
let type_data = Self::type_data();
let parent_iface = type_data.as_ref().parent_interface::<ListModel>()
as *const ffi::GListModelInterface;
let func = (*parent_iface)
.get_n_items
.expect("no parent \"n_items\" implementation");
func(list_model.unsafe_cast_ref::<ListModel>().to_glib_none().0)
}
}
fn parent_item(&self, list_model: &Self::Type, position: u32) -> Option<glib::Object> {
unsafe {
let type_data = Self::type_data();
let parent_iface = type_data.as_ref().parent_interface::<ListModel>()
as *const ffi::GListModelInterface;
let func = (*parent_iface)
.get_item
.expect("no parent \"get_item\" implementation");
let ret = func(
list_model.unsafe_cast_ref::<ListModel>().to_glib_none().0,
position,
);
from_glib_full(ret)
}
}
}
unsafe impl<T: ListModelImpl> IsImplementable<T> for ListModel
where
<T as ObjectSubclass>::Type: IsA<glib::Object>,
{
fn interface_init(iface: &mut glib::Interface<Self>) {
let iface = iface.as_mut();
iface.get_item_type = Some(list_model_get_item_type::<T>);
iface.get_n_items = Some(list_model_get_n_items::<T>);
iface.get_item = Some(list_model_get_item::<T>);
}
}
static LIST_ITEM_TYPE_QUARK: Lazy<glib::Quark> =
Lazy::new(|| glib::Quark::from_str("gtk-rs-subclass-list-model-item-type"));
unsafe extern "C" fn list_model_get_item_type<T: ListModelImpl>(
list_model: *mut ffi::GListModel,
) -> glib::ffi::GType
where
<T as ObjectSubclass>::Type: IsA<glib::Object>,
{
let instance = &*(list_model as *mut T::Instance);
let imp = instance.imp();
let wrap = from_glib_borrow::<_, ListModel>(list_model);
let type_ = imp.item_type(wrap.unsafe_cast_ref()).into_glib();
match wrap.qdata(*LIST_ITEM_TYPE_QUARK) {
Some(old_type) => {
assert_eq!(
type_,
*old_type.as_ref(),
"ListModel's get_item_type cannot be changed"
);
}
None => {
wrap.set_qdata(*LIST_ITEM_TYPE_QUARK, type_);
}
}
type_
}
unsafe extern "C" fn list_model_get_n_items<T: ListModelImpl>(
list_model: *mut ffi::GListModel,
) -> u32
where
<T as ObjectSubclass>::Type: IsA<glib::Object>,
{
let instance = &*(list_model as *mut T::Instance);
let imp = instance.imp();
imp.n_items(from_glib_borrow::<_, ListModel>(list_model).unsafe_cast_ref())
}
unsafe extern "C" fn list_model_get_item<T: ListModelImpl>(
list_model: *mut ffi::GListModel,
position: u32,
) -> *mut glib::gobject_ffi::GObject
where
<T as ObjectSubclass>::Type: IsA<glib::Object>,
{
let instance = &*(list_model as *mut T::Instance);
let imp = instance.imp();
let wrap = from_glib_borrow::<_, ListModel>(list_model);
let item = imp.item(wrap.unsafe_cast_ref(), position);
if let Some(ref i) = item {
let type_ = imp.item_type(wrap.unsafe_cast_ref());
assert!(
i.type_().is_a(type_),
"All ListModel items need to be of type {} or a subtype of it",
type_.name()
);
};
item.to_glib_full()
}