rmux-server 0.1.1

Tokio daemon and request dispatcher for the RMUX terminal multiplexer.
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

use std::time::{Duration, Instant};

use tokio::time::sleep;

use super::super::RequestHandler;

impl RequestHandler {
    pub(in crate::handler) async fn set_attached_key_table(
        &self,
        attach_pid: u32,
        key_table_name: Option<String>,
        key_table_set_at: Option<Instant>,
    ) -> Result<(), rmux_proto::RmuxError> {
        let previous_key_table = {
            let mut active_attach = self.active_attach.lock().await;
            let active = active_attach.by_pid.get_mut(&attach_pid).ok_or_else(|| {
                rmux_proto::RmuxError::Server("attached client disappeared".to_owned())
            })?;
            if active.key_table_name == key_table_name {
                active.key_table_set_at = key_table_set_at.filter(|_| key_table_name.is_some());
                return Ok(());
            }

            let previous = active.key_table_name.clone();
            active.key_table_name = key_table_name.clone();
            active.key_table_set_at = key_table_set_at.filter(|_| key_table_name.is_some());
            previous
        };

        let mut state = self.state.lock().await;
        if let Some(table_name) = key_table_name {
            let _ = state.key_bindings.get_table(&table_name, true);
        }
        if let Some(table_name) = previous_key_table {
            state.key_bindings.unref_table(&table_name);
        }
        Ok(())
    }

    pub(in crate::handler) fn schedule_attached_prefix_timeout(
        &self,
        attach_pid: u32,
        key_table_set_at: Instant,
        timeout_ms: u64,
    ) {
        let handler = self.clone();
        tokio::spawn(async move {
            sleep(Duration::from_millis(timeout_ms)).await;
            handler
                .clear_attached_prefix_table_if_current(attach_pid, key_table_set_at)
                .await;
        });
    }

    pub(in crate::handler) fn schedule_attached_repeat_timeout(
        &self,
        attach_pid: u32,
        repeat_deadline: Instant,
    ) {
        let handler = self.clone();
        tokio::spawn(async move {
            sleep(repeat_deadline.saturating_duration_since(Instant::now())).await;
            handler
                .clear_attached_repeat_state_if_current(attach_pid, repeat_deadline)
                .await;
        });
    }

    async fn clear_attached_prefix_table_if_current(
        &self,
        attach_pid: u32,
        key_table_set_at: Instant,
    ) {
        let previous_key_table = {
            let mut active_attach = self.active_attach.lock().await;
            let Some(active) = active_attach.by_pid.get_mut(&attach_pid) else {
                return;
            };
            if active.key_table_name.as_deref() != Some("prefix")
                || active.key_table_set_at != Some(key_table_set_at)
                || active.repeat_active
            {
                return;
            }

            let previous = active.key_table_name.clone();
            active.key_table_name = None;
            active.key_table_set_at = None;
            active.repeat_deadline = None;
            active.repeat_active = false;
            active.last_key = None;
            previous
        };

        if let Some(table_name) = previous_key_table {
            let mut state = self.state.lock().await;
            state.key_bindings.unref_table(&table_name);
        }
    }

    async fn clear_attached_repeat_state_if_current(
        &self,
        attach_pid: u32,
        repeat_deadline: Instant,
    ) {
        let previous_key_table = {
            let mut active_attach = self.active_attach.lock().await;
            let Some(active) = active_attach.by_pid.get_mut(&attach_pid) else {
                return;
            };
            if active.repeat_deadline != Some(repeat_deadline) {
                return;
            }

            let previous = active.key_table_name.clone();
            active.key_table_name = None;
            active.key_table_set_at = None;
            active.repeat_deadline = None;
            active.repeat_active = false;
            active.last_key = None;
            previous
        };

        if let Some(table_name) = previous_key_table {
            let mut state = self.state.lock().await;
            state.key_bindings.unref_table(&table_name);
        }
    }
}