lewp_css/domain/
atom.rs

1// This file is part of css. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT. No part of predicator, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
2// Copyright © 2017 The developers of css. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT.
3
4use {
5    cssparser::{serialize_identifier, CowRcStr, ToCss},
6    precomputed_hash::PrecomputedHash,
7    std::{
8        borrow::{Borrow, Cow},
9        collections::hash_map::DefaultHasher,
10        fmt::{self, Display, Formatter},
11        hash::{Hash, Hasher},
12        ops::Deref,
13        str::FromStr,
14    },
15};
16
17/// NOTE: At some future point, Atom may become a wrapper around a string cache value
18#[derive(Default, Debug, Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
19pub struct Atom(pub String);
20
21impl Deref for Atom {
22    type Target = str;
23
24    #[inline(always)]
25    fn deref(&self) -> &Self::Target {
26        &self.0
27    }
28}
29
30impl ToCss for Atom {
31    #[inline(always)]
32    fn to_css<W: fmt::Write>(&self, dest: &mut W) -> fmt::Result {
33        serialize_identifier(&self.0, dest)
34    }
35}
36
37impl Display for Atom {
38    #[inline(always)]
39    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
40        self.0.fmt(f)
41    }
42}
43
44impl From<String> for Atom {
45    #[inline(always)]
46    fn from(value: String) -> Self {
47        Atom(value)
48    }
49}
50
51impl<'a> From<&'a str> for Atom {
52    #[inline(always)]
53    fn from(value: &'a str) -> Self {
54        Atom(value.to_owned())
55    }
56}
57
58impl<'i> From<CowRcStr<'i>> for Atom {
59    #[inline(always)]
60    fn from(value: CowRcStr<'i>) -> Self {
61        Atom::from(value.as_ref())
62    }
63}
64
65impl<'a> From<Cow<'a, str>> for Atom {
66    #[inline(always)]
67    fn from(value: Cow<'a, str>) -> Self {
68        Atom(value.into_owned())
69    }
70}
71
72impl<'a, 'i> From<&'a CowRcStr<'i>> for Atom {
73    #[inline(always)]
74    fn from(value: &'a CowRcStr<'i>) -> Self {
75        Atom::from(value.as_ref())
76    }
77}
78
79impl FromStr for Atom {
80    type Err = ();
81
82    #[inline(always)]
83    fn from_str(s: &str) -> Result<Self, Self::Err> {
84        Ok(Atom(s.to_owned()))
85    }
86}
87
88impl Borrow<str> for Atom {
89    #[inline(always)]
90    fn borrow(&self) -> &str {
91        self.deref()
92    }
93}
94
95impl PrecomputedHash for Atom {
96    #[inline(always)]
97    fn precomputed_hash(&self) -> u32 {
98        let mut state = DefaultHasher::new();
99        self.0.hash(&mut state);
100        state.finish() as u32
101    }
102}
103
104impl Atom {
105    #[inline(always)]
106    pub fn is_ascii(&self) -> bool {
107        self.0.is_ascii()
108    }
109
110    #[inline(always)]
111    pub fn eq_ignore_ascii_case(&self, name: &str) -> bool {
112        self.deref().eq_ignore_ascii_case(name)
113    }
114}
lewp_css/domain/atom.rs

lewp_css/domain/
atom.rs
