thedes_tui/
cancellability.rs

1use std::ops::Not;
2
3pub trait Cancellation<I> {
4    type Output;
5
6    fn is_cancellable(&self) -> bool;
7
8    fn is_cancelling(&self) -> bool;
9
10    fn set_cancelling(&mut self, is_it: bool);
11
12    fn make_output(&self, item: I) -> Self::Output;
13}
14
15#[derive(Debug, Clone, Copy, PartialEq, Default)]
16pub struct NonCancellable;
17
18impl<I> Cancellation<I> for NonCancellable {
19    type Output = I;
20
21    fn is_cancellable(&self) -> bool {
22        false
23    }
24
25    fn is_cancelling(&self) -> bool {
26        false
27    }
28
29    fn set_cancelling(&mut self, _is_it: bool) {}
30
31    fn make_output(&self, item: I) -> Self::Output {
32        item
33    }
34}
35
36#[derive(Debug, Clone, Copy, PartialEq, Default)]
37pub struct Cancellable {
38    is_cancelling: bool,
39}
40
41impl Cancellable {
42    pub fn new(initial_cancelling: bool) -> Self {
43        Self { is_cancelling: initial_cancelling }
44    }
45}
46
47impl<I> Cancellation<I> for Cancellable {
48    type Output = Option<I>;
49
50    fn is_cancellable(&self) -> bool {
51        true
52    }
53
54    fn is_cancelling(&self) -> bool {
55        self.is_cancelling
56    }
57
58    fn set_cancelling(&mut self, is_it: bool) {
59        self.is_cancelling = is_it;
60    }
61
62    fn make_output(&self, item: I) -> Self::Output {
63        self.is_cancelling.not().then_some(item)
64    }
65}
thedes_tui/cancellability.rs

thedes_tui/
cancellability.rs
