nappgui 0.2.0

Rust bindings to NAppGUI
Documentation 
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
148
149
150
151
152
153
154
155
156
157
158
159
160
161

macro_rules! listener {
    ($handler:expr, ($($params: ty)?) $(-> $return:ty)?) => {{
        use std::ffi::c_void;

        unsafe extern "C" fn shim(data: *mut c_void, event: *mut nappgui_sys::Event) {
            let data = data as *mut Box<dyn FnMut($(& $params)?) $(-> $return)?>;
            let f = &mut *data;
            #[allow(unused)]
            let event = crate::core::event::Event::new(event);
            $(
                let params = event.params::<$params>().unwrap();
            )?
            #[allow(unused)]
            if let Ok(r) = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| f($(&(params as $params))?))) {
                $( event.result(r as $return); )?
            }
        }

        let cb: Box<dyn FnMut($(& $params)?) $(-> $return)?> = Box::new($handler);
        let data: *mut Box<dyn FnMut($(& $params)?) $(-> $return)?> = Box::into_raw(Box::new(cb));

        let listener = unsafe { nappgui_sys::listener_imp(data as *mut c_void, Some(shim)) };
        listener
    }};
}

// macro_rules! callback {
//     (
//         $(#[$meta:meta])*
//         $vis:vis $func:ident($obj:ty) => $c_func:ident
//     ) => {
//         $(#[$meta])*
//         $vis fn $func<F>(&self, handler: F)
//         where
//             F: FnMut(&mut $obj, &crate::core::event::Event) + 'static,
//         {
//             let listener = crate::util::macros::listener!(self.as_ptr(), handler, $obj);
//             unsafe {
//                 $c_func(self.as_ptr(), listener);
//             }
//         }
//     };
//     (
//         $(
//             $(#[$meta:meta])*
//             $vis:vis $func:ident($obj:ty) => $c_func:ident
//         );*$(;)?
//     ) => {
//         $(
//             callback!(
//                 $(#[$meta])*
//                 $vis $func($obj) => $c_func
//             );
//         )*
//     }
// }

macro_rules! callback {
    (
        $(#[$meta:meta])*
        $vis:vis $func:ident($($params: ty)?) $(-> $return:ty)? => $c_func:ident
    ) => {
        $(#[$meta])*
        $vis fn $func<F>(&self, handler: F)
        where
            F: FnMut($(& $params)?) $(-> $return)? + 'static,
        {
            use std::ffi::c_void;

            unsafe extern "C" fn shim(data: *mut c_void, event: *mut nappgui_sys::Event) {
                let data = data as *mut Box<dyn FnMut($(& $params)?) $(-> $return)?>;
                let f = &mut *data;
                #[allow(unused)]
                let event = crate::core::event::Event::new(event);
                $(
                    let params = event.params::<$params>().unwrap();
                )?
                #[allow(unused)]
                if let Ok(r) = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| f($(&(params as $params))?))) {
                    $( event.result(r as $return); )?
                }
            }

            let cb: Box<dyn FnMut($(& $params)?) $(-> $return)?> = Box::new(handler);
            let data: *mut Box<dyn FnMut($(& $params)?) $(-> $return)?> = Box::into_raw(Box::new(cb));

            let listener = unsafe { nappgui_sys::listener_imp(data as *mut c_void, Some(shim)) };

            unsafe {
                $c_func(self.as_ptr(), listener);
            }
        }
    };
    (
        $(
            $(#[$meta:meta])*
            $vis:vis $func:ident($($params: ty)?) $(-> $return:ty)? => $c_func:ident
        );*$(;)?
    ) => {
        $(
            callback!(
                $(#[$meta])*
                $vis $func($($params)?) $(-> $return)? => $c_func
            );
        )*
    }
}

// macro_rules! pub_crate_ptr_ops {
//     ($pointer: ty) => {
//         #[allow(unused)]
//         pub(crate) fn from_raw(ptr: $pointer) -> Self {
//             if ptr.is_null() {
//                 panic!("pointer `{}` is null", std::any::type_name::<$pointer>());
//             }
//             Self {
//                 inner: std::rc::Rc::<$pointer>::new(ptr),
//             }
//         }

//         #[allow(unused)]
//         pub(crate) unsafe fn from_raw_no_drop(ptr: $pointer) -> Self {
//             if ptr.is_null() {
//                 panic!("pointer `{}` is null", std::any::type_name::<$pointer>());
//             }

//             let inner = std::rc::Rc::<$pointer>::new(ptr);
//             let inner = std::rc::Rc::<$pointer>::into_raw(inner);
//             std::rc::Rc::increment_strong_count(inner);
//             let inner = std::rc::Rc::from_raw(inner);
//             Self { inner }
//         }

//         #[allow(unused)]
//         pub(crate) fn from_raw_option(ptr: $pointer) -> Option<Self> {
//             if ptr.is_null() {
//                 None
//             } else {
//                 Some(Self::from_raw(ptr))
//             }
//         }

//         #[allow(unused)]
//         pub(crate) unsafe fn from_raw_no_drop_option(ptr: $pointer) -> Option<Self> {
//             if ptr.is_null() {
//                 None
//             } else {
//                 Some(Self::from_raw_no_drop(ptr))
//             }
//         }

//         #[allow(unused)]
//         pub(crate) fn as_ptr(&self) -> $pointer {
//             *self.inner
//         }
//     };
// }

pub(crate) use callback;
pub(crate) use listener;
// pub(crate) use pub_crate_ptr_ops;