freya_core/
event_handler.rs

1use std::{
2    cell::RefCell,
3    rc::Rc,
4};
5
6pub struct Callback<A, R>(Rc<RefCell<dyn FnMut(A) -> R>>);
7
8impl<A, R> Callback<A, R> {
9    pub fn new(callback: impl FnMut(A) -> R + 'static) -> Self {
10        Self(Rc::new(RefCell::new(callback)))
11    }
12
13    pub fn call(&self, data: A) -> R {
14        (self.0.borrow_mut())(data)
15    }
16}
17
18impl<A, R> Clone for Callback<A, R> {
19    fn clone(&self) -> Self {
20        Self(self.0.clone())
21    }
22}
23
24impl<A, R> PartialEq for Callback<A, R> {
25    fn eq(&self, _other: &Self) -> bool {
26        // TODO: Decide whether event handlers should be captured or not.
27        false
28    }
29}
30
31impl<A, R, H: FnMut(A) -> R + 'static> From<H> for Callback<A, R> {
32    fn from(value: H) -> Self {
33        Callback::new(value)
34    }
35}
36
37pub struct NoArgCallback<R>(Rc<RefCell<dyn FnMut() -> R>>);
38
39impl<R> NoArgCallback<R> {
40    pub fn new(callback: impl FnMut() -> R + 'static) -> Self {
41        Self(Rc::new(RefCell::new(callback)))
42    }
43
44    pub fn call(&self) -> R {
45        (self.0.borrow_mut())()
46    }
47}
48
49impl<R> Clone for NoArgCallback<R> {
50    fn clone(&self) -> Self {
51        Self(self.0.clone())
52    }
53}
54
55impl<R> PartialEq for NoArgCallback<R> {
56    fn eq(&self, _other: &Self) -> bool {
57        true
58    }
59}
60
61impl<R, H: FnMut() -> R + 'static> From<H> for NoArgCallback<R> {
62    fn from(value: H) -> Self {
63        NoArgCallback::new(value)
64    }
65}
66
67pub struct EventHandler<T>(Rc<RefCell<dyn FnMut(T)>>);
68
69impl<T> EventHandler<T> {
70    pub fn new(handler: impl FnMut(T) + 'static) -> Self {
71        Self(Rc::new(RefCell::new(handler)))
72    }
73
74    pub fn call(&self, data: T) {
75        (self.0.borrow_mut())(data);
76    }
77}
78
79impl<T> Clone for EventHandler<T> {
80    fn clone(&self) -> Self {
81        Self(self.0.clone())
82    }
83}
84
85impl<T> PartialEq for EventHandler<T> {
86    fn eq(&self, _other: &Self) -> bool {
87        // TODO: Decide whether event handlers should be captured or not.
88        false
89    }
90}
91
92impl<H: FnMut(D) + 'static, D> From<H> for EventHandler<D> {
93    fn from(value: H) -> Self {
94        EventHandler::new(value)
95    }
96}
freya_core/event_handler.rs

freya_core/
event_handler.rs
