gtk4/subclass/
section_model.rs
1use glib::translate::*;
8
9use crate::{ffi, prelude::*, subclass::prelude::*, SectionModel};
10
11pub trait SectionModelImpl: ListModelImpl {
12 #[doc(alias = "get_section")]
13 fn section(&self, position: u32) -> (u32, u32) {
14 self.parent_section(position)
15 }
16}
17
18mod sealed {
19 pub trait Sealed {}
20 impl<T: super::SectionModelImplExt> Sealed for T {}
21}
22
23pub trait SectionModelImplExt: sealed::Sealed + ObjectSubclass {
24 fn parent_section(&self, position: u32) -> (u32, u32) {
25 unsafe {
26 let type_data = Self::type_data();
27 let parent_iface = type_data.as_ref().parent_interface::<SectionModel>()
28 as *const ffi::GtkSectionModelInterface;
29
30 let func = (*parent_iface)
31 .get_section
32 .expect("no parent \"get_section\" implementation");
33
34 let mut start = std::mem::MaybeUninit::uninit();
35 let mut end = std::mem::MaybeUninit::uninit();
36 func(
37 self.obj()
38 .unsafe_cast_ref::<SectionModel>()
39 .to_glib_none()
40 .0,
41 position,
42 start.as_mut_ptr(),
43 end.as_mut_ptr(),
44 );
45 (start.assume_init(), end.assume_init())
46 }
47 }
48}
49
50impl<T: SectionModelImpl> SectionModelImplExt for T {}
51
52unsafe impl<T: SectionModelImpl> IsImplementable<T> for SectionModel {
53 fn interface_init(iface: &mut glib::Interface<Self>) {
54 let iface = iface.as_mut();
55
56 assert_initialized_main_thread!();
57
58 iface.get_section = Some(model_get_section::<T>);
59 }
60}
61
62unsafe extern "C" fn model_get_section<T: SectionModelImpl>(
63 model: *mut ffi::GtkSectionModel,
64 position: u32,
65 startptr: *mut libc::c_uint,
66 endptr: *mut libc::c_uint,
67) {
68 let instance = &*(model as *mut T::Instance);
69 let imp = instance.imp();
70
71 let (start, end) = imp.section(position);
72 *startptr = start;
73 *endptr = end;
74}