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|
use super::*;
/// A combined relative and absolute length.
#[derive(Default, Copy, Clone, Eq, PartialEq, Hash)]
pub struct Linear {
/// The relative part.
pub rel: Relative,
/// The absolute part.
pub abs: Length,
}
impl Linear {
/// The zero linear.
pub fn zero() -> Self {
Self {
rel: Relative::zero(),
abs: Length::zero(),
}
}
/// The linear with a relative part of `100%` and no absolute part.
pub fn one() -> Self {
Self {
rel: Relative::one(),
abs: Length::zero(),
}
}
/// Create a new linear.
pub fn new(rel: Relative, abs: Length) -> Self {
Self { rel, abs }
}
/// Resolve this relative to the given `length`.
pub fn resolve(self, length: Length) -> Length {
self.rel.resolve(length) + self.abs
}
/// Whether both parts are zero.
pub fn is_zero(self) -> bool {
self.rel.is_zero() && self.abs.is_zero()
}
/// Whether there is a linear component.
pub fn is_relative(&self) -> bool {
!self.rel.is_zero()
}
}
impl Display for Linear {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(f, "{} + {}", self.rel, self.abs)
}
}
impl Debug for Linear {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(f, "{:?} + {:?}", self.rel, self.abs)
}
}
impl From<Length> for Linear {
fn from(abs: Length) -> Self {
Self { rel: Relative::zero(), abs }
}
}
impl From<Relative> for Linear {
fn from(rel: Relative) -> Self {
Self { rel, abs: Length::zero() }
}
}
impl Neg for Linear {
type Output = Self;
fn neg(self) -> Self {
Self { rel: -self.rel, abs: -self.abs }
}
}
impl Add for Linear {
type Output = Self;
fn add(self, other: Self) -> Self {
Self {
rel: self.rel + other.rel,
abs: self.abs + other.abs,
}
}
}
impl Add<Relative> for Length {
type Output = Linear;
fn add(self, other: Relative) -> Linear {
Linear { rel: other, abs: self }
}
}
impl Add<Length> for Relative {
type Output = Linear;
fn add(self, other: Length) -> Linear {
other + self
}
}
impl Add<Length> for Linear {
type Output = Self;
fn add(self, other: Length) -> Self {
Self { rel: self.rel, abs: self.abs + other }
}
}
impl Add<Linear> for Length {
type Output = Linear;
fn add(self, other: Linear) -> Linear {
other + self
}
}
impl Add<Relative> for Linear {
type Output = Self;
fn add(self, other: Relative) -> Self {
Self { rel: self.rel + other, abs: self.abs }
}
}
impl Add<Linear> for Relative {
type Output = Linear;
fn add(self, other: Linear) -> Linear {
other + self
}
}
sub_impl!(Linear - Linear -> Linear);
sub_impl!(Length - Relative -> Linear);
sub_impl!(Relative - Length -> Linear);
sub_impl!(Linear - Length -> Linear);
sub_impl!(Length - Linear -> Linear);
sub_impl!(Linear - Relative -> Linear);
sub_impl!(Relative - Linear -> Linear);
impl Mul<f64> for Linear {
type Output = Self;
fn mul(self, other: f64) -> Self {
Self {
rel: self.rel * other,
abs: self.abs * other,
}
}
}
impl Mul<Linear> for f64 {
type Output = Linear;
fn mul(self, other: Linear) -> Linear {
Linear {
rel: self * other.rel,
abs: self * other.abs,
}
}
}
impl Div<f64> for Linear {
type Output = Self;
fn div(self, other: f64) -> Self {
Self {
rel: self.rel / other,
abs: self.abs / other,
}
}
}
assign_impl!(Linear += Linear);
assign_impl!(Linear += Length);
assign_impl!(Linear += Relative);
assign_impl!(Linear -= Linear);
assign_impl!(Linear -= Length);
assign_impl!(Linear -= Relative);
assign_impl!(Linear *= f64);
assign_impl!(Linear /= f64);
|
