tailwind_css_fixes/systems/units/length/
mod.rs

1use std::ops::Rem;
2
3use tailwind_ast::parse_fraction;
4
5use super::*;
6
7#[derive(Debug, Copy, Clone)]
8pub enum LengthUnit {
9    Fraction(u32, u32),
10    Unit(f32, &'static str),
11}
12
13impl Display for LengthUnit {
14    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
15        match self {
16            Self::Fraction(a, b) => write!(f, "{}/{}", a, b),
17            Self::Unit(a, b) => write!(f, "{}{}", a, b),
18        }
19    }
20}
21
22impl LengthUnit {
23    /// <https://developer.mozilla.org/en-US/docs/Web/CSS/length#syntax>
24    pub fn parse_fraction(input: &str) -> Result<Self> {
25        let (a, b) = parse_fraction(input)?.1;
26        Ok(Self::ratio(a as u32, b as u32))
27    }
28    pub fn parse_length(input: &str) -> Result<Self> {
29        let valid = (unit("px"), unit("em"), unit("rem"), unit("%"), unit("vh"), unit("vw"));
30        let (f, unit) = tuple((parse_f32, alt(valid)))(input)?.1;
31        Ok(Self::Unit(f, unit))
32    }
33    pub fn parse_angle(input: &str) -> Result<Self> {
34        let valid = (unit("deg"), unit("rad"), unit("grad"), unit("turn"));
35        let (f, unit) = tuple((parse_f32, alt(valid)))(input)?.1;
36        Ok(Self::Unit(f, unit))
37    }
38    pub fn px(x: f32) -> Self {
39        Self::Unit(x, "px")
40    }
41    pub fn em(x: f32) -> Self {
42        Self::Unit(x, "em")
43    }
44    pub fn rem(x: f32) -> Self {
45        Self::Unit(x, "rem")
46    }
47    pub fn percent(x: f32) -> Self {
48        Self::Unit(x, "%")
49    }
50    pub fn vh(x: f32) -> Self {
51        Self::Unit(x, "vh")
52    }
53    pub fn vw(x: f32) -> Self {
54        Self::Unit(x, "vw")
55    }
56    pub fn ratio(a: u32, b: u32) -> Self {
57        if b.eq(&0) {
58            return Self::Fraction(0, 1);
59        }
60        let n = gcd(a, b);
61        Self::Fraction(a / n, b / n)
62    }
63}
64
65pub fn gcd<T>(a: T, b: T) -> T
66where
67    T: PartialEq + Rem<Output = T> + Default + Copy,
68{
69    if b == T::default() { a } else { gcd(b, a % b) }
70}
71
72fn unit(unit: &'static str) -> impl Fn(&str) -> IResult<&str, &'static str> {
73    move |input: &str| tag(unit)(input).map(|(s, _)| (s, unit))
74}
75
76impl LengthUnit {
77    #[inline]
78    pub fn get_class(&self) -> String {
79        self.to_string()
80    }
81    #[inline]
82    pub fn get_class_arbitrary(&self) -> String {
83        format!("[{}]", self)
84    }
85    #[inline]
86    pub fn get_properties(&self) -> String {
87        match self {
88            Self::Fraction(a, b) => {
89                let p = *a as f32 / *b as f32;
90                format!("{}%", 100.0 * p)
91            },
92            Self::Unit(a, b) => format!("{}{}", a, b),
93        }
94    }
95
96    pub fn is_fraction(&self) -> bool {
97        matches!(self, Self::Fraction { .. })
98    }
99    pub fn is_fraction_eq(&self) -> bool {
100        match self {
101            Self::Fraction(a, b) => a.eq(b),
102            _ => false,
103        }
104    }
105    pub fn is_fraction_zero(&self) -> bool {
106        match self {
107            Self::Fraction(a, _) => a.eq(&0),
108            _ => false,
109        }
110    }
111    /// Used to tell if a LengthUnit is 0, no matter the unit.
112    ///  - Useful for consolidating all 0s into one classname
113    pub fn is_zero(&self) -> bool {
114        match self {
115            Self::Fraction(a, _) => a.eq(&0),
116            Self::Unit(a, _) => a.eq(&0.0),
117        }
118    }
119}
tailwind_css_fixes/systems/units/length/mod.rs

tailwind_css_fixes/systems/units/length/
mod.rs
