1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
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) -> glib::Type;
#[doc(alias = "get_n_items")]
fn n_items(&self) -> u32;
#[doc(alias = "get_item")]
fn item(&self, position: u32) -> Option<glib::Object>;
}
pub trait ListModelImplExt: ObjectSubclass {
fn parent_item_type(&self) -> glib::Type;
fn parent_n_items(&self) -> u32;
fn parent_item(&self, position: u32) -> Option<glib::Object>;
}
impl<T: ListModelImpl> ListModelImplExt for T {
fn parent_item_type(&self) -> 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(self.obj().unsafe_cast_ref::<ListModel>().to_glib_none().0);
from_glib(ret)
}
}
fn parent_n_items(&self) -> 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(self.obj().unsafe_cast_ref::<ListModel>().to_glib_none().0)
}
}
fn parent_item(&self, 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(
self.obj().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 type_ = imp.item_type().into_glib();
let instance = imp.obj();
match instance.qdata(*LIST_ITEM_TYPE_QUARK) {
Some(old_type) => {
assert_eq!(
type_,
*old_type.as_ref(),
"ListModel's get_item_type cannot be changed"
);
}
None => {
instance.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()
}
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 item = imp.item(position);
if let Some(ref i) = item {
let type_ = imp.item_type();
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()
}