xcolor 0.5.1

Lightweight color picker for X11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

use anyhow::{anyhow, Result};
use lazy_static::*;
use std::collections::hash_map::Entry;
use std::collections::HashMap;
use std::sync::Mutex;
use xcb::xproto;
use xcb::Connection;

lazy_static! {
    static ref ATOM_CACHE: Mutex<HashMap<&'static str, xproto::Atom>> = Mutex::new(HashMap::new());
}

pub fn get(conn: &Connection, name: &'static str) -> Result<xproto::Atom> {
    let mut map = ATOM_CACHE
        .lock()
        .map_err(|_| anyhow!("Failed to access atom cache"))?;
    match map.entry(name) {
        Entry::Occupied(entry) => Ok(*entry.get()),
        Entry::Vacant(entry) => {
            let interned = xproto::intern_atom(conn, true, name).get_reply()?.atom();
            Ok(*entry.insert(interned))
        }
    }
}