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|
use super::*;
/// A value that is composed of a relative and an absolute part.
#[derive(Default, Copy, Clone, Eq, PartialEq, Hash)]
pub struct Relative<T: Numeric> {
/// The relative part.
pub rel: Ratio,
/// The absolute part.
pub abs: T,
}
impl<T: Numeric> Relative<T> {
/// The zero relative.
pub fn zero() -> Self {
Self { rel: Ratio::zero(), abs: T::zero() }
}
/// A relative with a ratio of `100%` and no absolute part.
pub fn one() -> Self {
Self { rel: Ratio::one(), abs: T::zero() }
}
/// Create a new relative from its parts.
pub fn new(rel: Ratio, abs: T) -> Self {
Self { rel, abs }
}
/// Whether both parts are zero.
pub fn is_zero(self) -> bool {
self.rel.is_zero() && self.abs == T::zero()
}
/// Whether the relative part is one and the absolute part is zero.
pub fn is_one(self) -> bool {
self.rel.is_one() && self.abs == T::zero()
}
/// Evaluate this relative to the given `whole`.
pub fn relative_to(self, whole: T) -> T {
self.rel.of(whole) + self.abs
}
/// Map the absolute part with `f`.
pub fn map<F, U>(self, f: F) -> Relative<U>
where
F: FnOnce(T) -> U,
U: Numeric,
{
Relative { rel: self.rel, abs: f(self.abs) }
}
}
impl<T: Numeric> Debug for Relative<T> {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(f, "{:?} + {:?}", self.rel, self.abs)
}
}
impl<T: Numeric> From<T> for Relative<T> {
fn from(abs: T) -> Self {
Self { rel: Ratio::zero(), abs }
}
}
impl<T: Numeric> From<Ratio> for Relative<T> {
fn from(rel: Ratio) -> Self {
Self { rel, abs: T::zero() }
}
}
impl<T: Numeric> Neg for Relative<T> {
type Output = Self;
fn neg(self) -> Self {
Self { rel: -self.rel, abs: -self.abs }
}
}
impl<T: Numeric> Add for Relative<T> {
type Output = Self;
fn add(self, other: Self) -> Self::Output {
Self {
rel: self.rel + other.rel,
abs: self.abs + other.abs,
}
}
}
impl<T: Numeric> Sub for Relative<T> {
type Output = Self;
fn sub(self, other: Self) -> Self::Output {
self + -other
}
}
impl<T: Numeric> Mul<f64> for Relative<T> {
type Output = Self;
fn mul(self, other: f64) -> Self::Output {
Self {
rel: self.rel * other,
abs: self.abs * other,
}
}
}
impl<T: Numeric> Mul<Relative<T>> for f64 {
type Output = Relative<T>;
fn mul(self, other: Relative<T>) -> Self::Output {
other * self
}
}
impl<T: Numeric> Div<f64> for Relative<T> {
type Output = Self;
fn div(self, other: f64) -> Self::Output {
Self {
rel: self.rel / other,
abs: self.abs / other,
}
}
}
impl<T: Numeric + AddAssign> AddAssign for Relative<T> {
fn add_assign(&mut self, other: Self) {
self.rel += other.rel;
self.abs += other.abs;
}
}
impl<T: Numeric + SubAssign> SubAssign for Relative<T> {
fn sub_assign(&mut self, other: Self) {
self.rel -= other.rel;
self.abs -= other.abs;
}
}
impl<T: Numeric + MulAssign<f64>> MulAssign<f64> for Relative<T> {
fn mul_assign(&mut self, other: f64) {
self.rel *= other;
self.abs *= other;
}
}
impl<T: Numeric + DivAssign<f64>> DivAssign<f64> for Relative<T> {
fn div_assign(&mut self, other: f64) {
self.rel /= other;
self.abs /= other;
}
}
impl<T: Numeric> Add<T> for Ratio {
type Output = Relative<T>;
fn add(self, other: T) -> Self::Output {
Relative::from(self) + Relative::from(other)
}
}
impl<T: Numeric> Add<T> for Relative<T> {
type Output = Self;
fn add(self, other: T) -> Self::Output {
self + Relative::from(other)
}
}
impl<T: Numeric> Add<Ratio> for Relative<T> {
type Output = Self;
fn add(self, other: Ratio) -> Self::Output {
self + Relative::from(other)
}
}
|
