makepad_draw/text/
intern.rs

1use std::{
2    collections::HashSet,
3    sync::{Arc, Mutex, OnceLock},
4};
5
6pub trait Intern {
7    fn intern(&self) -> Arc<str>;
8}
9
10impl Intern for str {
11    fn intern(&self) -> Arc<str> {
12        INTERNER
13            .get_or_init(|| Mutex::new(Interner::new()))
14            .lock()
15            .unwrap()
16            .intern(self)
17    }
18}
19
20static INTERNER: OnceLock<Mutex<Interner>> = OnceLock::new();
21
22#[derive(Debug)]
23struct Interner {
24    cached_strings: HashSet<Arc<str>>,
25}
26
27impl Interner {
28    fn new() -> Self {
29        Self {
30            cached_strings: HashSet::new(),
31        }
32    }
33
34    fn intern(&mut self, string: &str) -> Arc<str> {
35        if !self.cached_strings.contains(string) {
36            self.cached_strings.insert(string.into());
37        }
38        self.cached_strings.get(string).unwrap().clone()
39    }
40}
makepad_draw/text/intern.rs

makepad_draw/text/
intern.rs
