glissade 0.2.10

Rust library that provides various utilities for animations and transitions
Documentation 
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use crate::{Keyframes, Time};
use std::fmt::Debug;
use std::marker::PhantomData;

/// An animation that reverses the order of keyframes.
pub struct ReverseKeyframes<T, X: Time, S: Keyframes<T, X>> {
    keyframes: S,
    phantom: PhantomData<(T, X)>,
}

impl<T, X: Time, S: Keyframes<T, X> + Debug> Debug for ReverseKeyframes<T, X, S> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("ReverseKeyframes")
            .field("keyframes", &self.keyframes)
            .finish()
    }
}

impl<T, X: Time, S: Keyframes<T, X> + PartialEq> PartialEq for ReverseKeyframes<T, X, S> {
    fn eq(&self, other: &Self) -> bool {
        self.keyframes == other.keyframes
    }
}

impl<T, X: Time, S: Keyframes<T, X>> ReverseKeyframes<T, X, S> {
    pub fn new(keyframes: S) -> Self {
        Self {
            keyframes,
            phantom: Default::default(),
        }
    }
}

impl<T, X: Time, S: Keyframes<T, X>> Keyframes<T, X> for ReverseKeyframes<T, X, S> {
    fn get(&self, offset: X::Duration) -> T {
        self.keyframes
            .get(X::duration_diff(self.keyframes.duration(), offset))
    }

    fn duration(&self) -> X::Duration {
        self.keyframes.duration()
    }

    fn is_finite(&self) -> bool {
        true
    }
}

impl<T, X: Time, S: Keyframes<T, X> + Clone> Clone for ReverseKeyframes<T, X, S> {
    fn clone(&self) -> Self {
        Self {
            keyframes: self.keyframes.clone(),
            phantom: Default::default(),
        }
    }
}

impl<T, X: Time, S: Keyframes<T, X> + Copy> Copy for ReverseKeyframes<T, X, S> {}