gtk4/subclass/
section_model.rs

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1// Take a look at the license at the top of the repository in the LICENSE file.
2
3// rustdoc-stripper-ignore-next
4//! Traits intended for implementing the [`SectionModel`] interface.
5
6use glib::translate::*;
7
8use crate::{ffi, prelude::*, subclass::prelude::*, SectionModel};
9
10pub trait SectionModelImpl: ListModelImpl + ObjectSubclass<Type: IsA<SectionModel>> {
11    #[doc(alias = "get_section")]
12    fn section(&self, position: u32) -> (u32, u32) {
13        self.parent_section(position)
14    }
15}
16
17pub trait SectionModelImplExt: SectionModelImpl {
18    fn parent_section(&self, position: u32) -> (u32, u32) {
19        unsafe {
20            let type_data = Self::type_data();
21            let parent_iface = type_data.as_ref().parent_interface::<SectionModel>()
22                as *const ffi::GtkSectionModelInterface;
23
24            let func = (*parent_iface)
25                .get_section
26                .expect("no parent \"get_section\" implementation");
27
28            let mut start = std::mem::MaybeUninit::uninit();
29            let mut end = std::mem::MaybeUninit::uninit();
30            func(
31                self.obj()
32                    .unsafe_cast_ref::<SectionModel>()
33                    .to_glib_none()
34                    .0,
35                position,
36                start.as_mut_ptr(),
37                end.as_mut_ptr(),
38            );
39            (start.assume_init(), end.assume_init())
40        }
41    }
42}
43
44impl<T: SectionModelImpl> SectionModelImplExt for T {}
45
46unsafe impl<T: SectionModelImpl> IsImplementable<T> for SectionModel {
47    fn interface_init(iface: &mut glib::Interface<Self>) {
48        let iface = iface.as_mut();
49
50        assert_initialized_main_thread!();
51
52        iface.get_section = Some(model_get_section::<T>);
53    }
54}
55
56unsafe extern "C" fn model_get_section<T: SectionModelImpl>(
57    model: *mut ffi::GtkSectionModel,
58    position: u32,
59    startptr: *mut libc::c_uint,
60    endptr: *mut libc::c_uint,
61) {
62    let instance = &*(model as *mut T::Instance);
63    let imp = instance.imp();
64
65    let (start, end) = imp.section(position);
66    *startptr = start;
67    *endptr = end;
68}
gtk4/subclass/section_model.rs

gtk4/subclass/
section_model.rs
