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Implement distance for shadow list.

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This commit is contained in:
Hiroyuki Ikezoe 2017-08-16 14:23:51 +09:00
parent dc654c9912
commit 41cbd2fa62
1 changed files with 17 additions and 4 deletions
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21
components/style/values/animated/effects.rs
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@ -104,11 +104,24 @@ where
} }
} }
impl<S> ComputeSquaredDistance for ShadowList<S> { impl<S> ComputeSquaredDistance for ShadowList<S>
where
S: ComputeSquaredDistance + ToAnimatedZero,
{
#[inline] #[inline]
fn compute_squared_distance(&self, _other: &Self) -> Result<SquaredDistance, ()> { fn compute_squared_distance(&self, other: &Self) -> Result<SquaredDistance, ()> {
// FIXME: This should be implemented. use itertools::{EitherOrBoth, Itertools};
Err(())
self.0.iter().zip_longest(other.0.iter()).map(|it| {
match it {
EitherOrBoth::Both(from, to) => {
from.compute_squared_distance(to)
},
EitherOrBoth::Left(list) | EitherOrBoth::Right(list) => {
list.compute_squared_distance(&list.to_animated_zero()?)
},
}
}).sum()
} }
} }