cargo-port 0.1.3

A TUI for inspecting and managing Rust projects
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

use std::collections::HashMap;

use super::KeyBind;

/// Bidirectional map for a single scope: key→action for dispatch,
/// action→key for display.
#[derive(Clone, Debug)]
pub(crate) struct ScopeMap<A: Copy + Eq + std::hash::Hash> {
    pub(crate) by_key:    HashMap<KeyBind, A>,
    pub(crate) by_action: HashMap<A, KeyBind>,
}

impl<A: Copy + Eq + std::hash::Hash> ScopeMap<A> {
    pub(super) fn new() -> Self {
        Self {
            by_key:    HashMap::new(),
            by_action: HashMap::new(),
        }
    }

    pub(super) fn insert(&mut self, key: KeyBind, action: A) {
        self.by_key.insert(key, action);
        self.by_action.insert(action, key);
    }

    #[cfg(test)]
    pub fn action_for(&self, key: &KeyBind) -> Option<A> { self.by_key.get(key).copied() }

    pub(super) fn key_for(&self, action: A) -> Option<&KeyBind> { self.by_action.get(&action) }

    /// Display string for an action's bound key, or `"—"` if unbound.
    #[cfg(test)]
    pub(super) fn display_key_for(&self, action: A) -> String {
        self.key_for(action)
            .map_or_else(|| "—".to_string(), KeyBind::display)
    }
}

impl<A: Copy + Eq + std::hash::Hash> Default for ScopeMap<A> {
    fn default() -> Self { Self::new() }
}