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
|
#[derive(Debug)]
pub enum Event {
Key(textmode::Key),
Resize((u16, u16)),
PtyOutput,
PtyClose,
ChildRunPipeline(usize, (usize, usize)),
ChildSuspend(usize),
GitInfo(Option<super::git::Info>),
ClockTimer,
}
pub struct Reader {
pending: async_std::sync::Mutex<Pending>,
cvar: async_std::sync::Condvar,
}
impl Reader {
pub fn new(
input: async_std::channel::Receiver<Event>,
) -> async_std::sync::Arc<Self> {
let this = async_std::sync::Arc::new(Self {
pending: async_std::sync::Mutex::new(Pending::new()),
cvar: async_std::sync::Condvar::new(),
});
{
let this = async_std::sync::Arc::clone(&this);
async_std::task::spawn(async move {
while let Ok(event) = input.recv().await {
this.new_event(Some(event)).await;
}
this.new_event(None).await;
});
}
this
}
pub async fn recv(&self) -> Option<Event> {
let mut pending = self
.cvar
.wait_until(self.pending.lock().await, |pending| {
pending.has_event()
})
.await;
pending.get_event()
}
async fn new_event(&self, event: Option<Event>) {
let mut pending = self.pending.lock().await;
pending.new_event(event);
self.cvar.notify_one();
}
}
#[allow(clippy::option_option)]
#[derive(Default)]
struct Pending {
key: std::collections::VecDeque<textmode::Key>,
size: Option<(u16, u16)>,
pty_output: bool,
pty_close: bool,
child_run_pipeline: std::collections::VecDeque<(usize, (usize, usize))>,
child_suspend: std::collections::VecDeque<usize>,
git_info: Option<Option<super::git::Info>>,
clock_timer: bool,
done: bool,
}
impl Pending {
fn new() -> Self {
Self::default()
}
fn has_event(&self) -> bool {
self.done
|| !self.key.is_empty()
|| self.size.is_some()
|| self.pty_output
|| self.pty_close
|| !self.child_run_pipeline.is_empty()
|| !self.child_suspend.is_empty()
|| self.git_info.is_some()
|| self.clock_timer
}
fn get_event(&mut self) -> Option<Event> {
if self.done {
return None;
}
if let Some(key) = self.key.pop_front() {
return Some(Event::Key(key));
}
if let Some(size) = self.size.take() {
return Some(Event::Resize(size));
}
if self.pty_close {
self.pty_close = false;
return Some(Event::PtyClose);
}
if let Some((idx, span)) = self.child_run_pipeline.pop_front() {
return Some(Event::ChildRunPipeline(idx, span));
}
if let Some(idx) = self.child_suspend.pop_front() {
return Some(Event::ChildSuspend(idx));
}
if let Some(info) = self.git_info.take() {
return Some(Event::GitInfo(info));
}
if self.clock_timer {
self.clock_timer = false;
return Some(Event::ClockTimer);
}
// process_output should be last because it will often be the case
// that there is ~always new process output (cat on large files, yes,
// etc) and that shouldn't prevent other events from happening
if self.pty_output {
self.pty_output = false;
return Some(Event::PtyOutput);
}
unreachable!()
}
fn new_event(&mut self, event: Option<Event>) {
match event {
Some(Event::Key(key)) => self.key.push_back(key),
Some(Event::Resize(size)) => self.size = Some(size),
Some(Event::PtyOutput) => self.pty_output = true,
Some(Event::PtyClose) => self.pty_close = true,
Some(Event::ChildRunPipeline(idx, span)) => {
self.child_run_pipeline.push_back((idx, span));
}
Some(Event::ChildSuspend(idx)) => {
self.child_suspend.push_back(idx);
}
Some(Event::GitInfo(info)) => self.git_info = Some(info),
Some(Event::ClockTimer) => self.clock_timer = true,
None => self.done = true,
}
}
}
|
