libshumate 0.8.1

Rust bindings for libshumate
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

// Take a look at the license at the top of the repository in the LICENSE file.

// rustdoc-stripper-ignore-next
//! Traits intended for subclassing [`MapSource`](crate::MapSource).

use crate::{MapSource, Tile, prelude::*};
use gio::{AsyncResult, Cancellable};
use glib::subclass::prelude::*;
use glib::translate::*;
use std::{future::Future, pin::Pin};

pub trait MapSourceImpl: ObjectImpl {
    fn fill_tile_future(
        &self,
        tile: &Tile,
    ) -> Pin<Box<dyn Future<Output = Result<(), glib::Error>> + 'static>>;
}

pub trait MapSourceImplExt: ObjectSubclass {
    #[allow(clippy::type_complexity)]
    fn parent_fill_tile_async<Q: IsA<Cancellable>, C: FnOnce(&AsyncResult) + Send + 'static>(
        &self,
        tile: &Tile,
        cancellable: Option<&Q>,
        callback: C,
    ) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::ShumateMapSourceClass;
            let f = (*parent_class)
                .fill_tile_async
                .expect("no parent \"fill_tile_async\" implementation");
            let user_data: Box<C> = Box::new(callback);

            unsafe extern "C" fn parent_fill_tile_async_trampoline<
                C: FnOnce(&AsyncResult) + Send + 'static,
            >(
                _source_object_ptr: *mut glib::gobject_ffi::GObject,
                res: *mut gio::ffi::GAsyncResult,
                user_data: glib::ffi::gpointer,
            ) {
                unsafe {
                    let res = AsyncResult::from_glib_borrow(res);
                    let cb: Box<C> = Box::from_raw(user_data as *mut _);
                    cb(&res)
                }
            }

            let cancellable = cancellable.map(|p| p.as_ref());
            let callback = parent_fill_tile_async_trampoline::<C>;
            f(
                self.obj().unsafe_cast_ref::<MapSource>().to_glib_none().0,
                tile.to_glib_none().0,
                cancellable.to_glib_none().0,
                Some(callback),
                Box::into_raw(user_data) as *mut _,
            );
        }
    }

    fn parent_fill_tile_future(
        &self,
        tile: &Tile,
    ) -> Pin<Box<dyn Future<Output = Result<(), glib::Error>> + 'static>> {
        let tile = tile.clone();
        Box::pin(gio::GioFuture::new(
            &self.ref_counted(),
            move |imp, cancellable, send| {
                imp.parent_fill_tile_async(&tile, Some(cancellable), move |res| {
                    send.resolve(res.legacy_propagate_error());
                });
            },
        ))
    }
}

impl<T: MapSourceImpl> MapSourceImplExt for T {}

unsafe impl<T: MapSourceImpl> IsSubclassable<T> for MapSource {
    fn class_init(class: &mut glib::Class<Self>) {
        Self::parent_class_init::<T>(class);

        let klass = class.as_mut();
        klass.fill_tile_async = Some(map_source_fill_tile_async::<T>);
        klass.fill_tile_finish = Some(map_source_fill_tile_finish);
    }
}

unsafe extern "C" fn map_source_fill_tile_async<T: MapSourceImpl>(
    ptr: *mut ffi::ShumateMapSource,
    tile: *mut ffi::ShumateTile,
    cancellable_ptr: *mut gio::ffi::GCancellable,
    callback: gio::ffi::GAsyncReadyCallback,
    user_data: glib::ffi::gpointer,
) {
    unsafe {
        let instance = &*(ptr as *mut T::Instance);
        let imp = instance.imp();
        let cancellable: Option<gio::Cancellable> = from_glib_none(cancellable_ptr);

        let closure = move |result: gio::LocalTask<bool>, source_object: Option<&MapSource>| {
            let result: *mut gio::ffi::GAsyncResult = result
                .unsafe_cast_ref::<gio::AsyncResult>()
                .to_glib_none()
                .0;
            let source_object = source_object
                .map(|o| o.unsafe_cast_ref::<glib::Object>())
                .to_glib_none()
                .0;
            callback.unwrap()(source_object, result, user_data)
        };

        let t = gio::LocalTask::new(None, cancellable.as_ref(), closure);

        glib::MainContext::default().spawn_local(async move {
            let res = imp.fill_tile_future(&from_glib_none(tile)).await;
            match res {
                Ok(_) => t.return_result(Ok(true)),
                Err(e) => t.return_result(Err(e)),
            }
        });
    }
}

unsafe extern "C" fn map_source_fill_tile_finish(
    _ptr: *mut ffi::ShumateMapSource,
    res_ptr: *mut gio::ffi::GAsyncResult,
    error_ptr: *mut *mut glib::ffi::GError,
) -> glib::ffi::gboolean {
    unsafe {
        let res: gio::AsyncResult = from_glib_none(res_ptr);
        let task = res.downcast::<gio::LocalTask<bool>>().unwrap();
        match task.propagate() {
            Ok(v) => {
                assert!(v);
                true.into_glib()
            }
            Err(e) => {
                *error_ptr = e.into_glib_ptr();
                false.into_glib()
            }
        }
    }
}