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use super::*;
/// A container with left, top, right and bottom components.
#[derive(Debug, Default, Copy, Clone, Eq, PartialEq, Hash)]
pub struct Sides<T> {
/// The value for the left side.
pub left: T,
/// The value for the top side.
pub top: T,
/// The value for the right side.
pub right: T,
/// The value for the bottom side.
pub bottom: T,
}
impl<T> Sides<T> {
/// Create a new instance from the four components.
pub const fn new(left: T, top: T, right: T, bottom: T) -> Self {
Self { left, top, right, bottom }
}
/// Create an instance with four equal components.
pub fn splat(value: T) -> Self
where
T: Clone,
{
Self {
left: value.clone(),
top: value.clone(),
right: value.clone(),
bottom: value,
}
}
}
impl<T> Sides<T>
where
T: Add,
{
/// Sums up `left` and `right` into `x`, and `top` and `bottom` into `y`.
pub fn sum_by_axis(self) -> Spec<T::Output> {
Spec::new(self.left + self.right, self.top + self.bottom)
}
}
impl Sides<Relative<Length>> {
/// Evaluate the sides relative to the given `size`.
pub fn relative_to(self, size: Size) -> Sides<Length> {
Sides {
left: self.left.relative_to(size.x),
top: self.top.relative_to(size.y),
right: self.right.relative_to(size.x),
bottom: self.bottom.relative_to(size.y),
}
}
}
impl<T> Get<Side> for Sides<T> {
type Component = T;
fn get(self, side: Side) -> T {
match side {
Side::Left => self.left,
Side::Top => self.top,
Side::Right => self.right,
Side::Bottom => self.bottom,
}
}
fn get_mut(&mut self, side: Side) -> &mut T {
match side {
Side::Left => &mut self.left,
Side::Top => &mut self.top,
Side::Right => &mut self.right,
Side::Bottom => &mut self.bottom,
}
}
}
/// The four sides of objects.
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum Side {
/// The left side.
Left,
/// The top side.
Top,
/// The right side.
Right,
/// The bottom side.
Bottom,
}
impl Side {
/// The opposite side.
pub fn inv(self) -> Self {
match self {
Self::Left => Self::Right,
Self::Top => Self::Bottom,
Self::Right => Self::Left,
Self::Bottom => Self::Top,
}
}
}
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