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use super::*;
/// A relative length.
///
/// _Note_: `50%` is represented as `0.5` here, but stored as `50.0` in the
/// corresponding [literal](crate::syntax::Lit::Percent).
#[derive(Default, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct Relative(N64);
impl Relative {
/// A ratio of `0%` represented as `0.0`.
pub fn zero() -> Self {
Self(N64::from(0.0))
}
/// A ratio of `100%` represented as `1.0`.
pub fn one() -> Self {
Self(N64::from(1.0))
}
/// Create a new relative value.
pub fn new(ratio: f64) -> Self {
Self(N64::from(ratio))
}
/// Get the underlying ratio.
pub fn get(self) -> f64 {
self.0.into()
}
/// Resolve this relative to the given `length`.
pub fn resolve(self, length: Length) -> Length {
// We don't want NaNs.
if length.is_infinite() {
Length::zero()
} else {
self.get() * length
}
}
/// Whether the ratio is zero.
pub fn is_zero(self) -> bool {
self.0 == 0.0
}
/// The absolute value of the this relative.
pub fn abs(self) -> Self {
Self::new(self.get().abs())
}
}
impl Debug for Relative {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(f, "{}%", 100.0 * self.get())
}
}
impl Neg for Relative {
type Output = Self;
fn neg(self) -> Self {
Self(-self.0)
}
}
impl Add for Relative {
type Output = Self;
fn add(self, other: Self) -> Self {
Self(self.0 + other.0)
}
}
sub_impl!(Relative - Relative -> Relative);
impl Mul<f64> for Relative {
type Output = Self;
fn mul(self, other: f64) -> Self {
Self(self.0 * other)
}
}
impl Mul<Relative> for f64 {
type Output = Relative;
fn mul(self, other: Relative) -> Relative {
other * self
}
}
impl Div<f64> for Relative {
type Output = Self;
fn div(self, other: f64) -> Self {
Self(self.0 / other)
}
}
impl Div for Relative {
type Output = f64;
fn div(self, other: Self) -> f64 {
self.get() / other.get()
}
}
assign_impl!(Relative += Relative);
assign_impl!(Relative -= Relative);
assign_impl!(Relative *= f64);
assign_impl!(Relative /= f64);
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