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Derive ToComputedValue

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For now, only impls for types like in style::values::generics can be derived.

This also needed a few ToComputedValueAsSpecified impls that I would like to
replace by some #[to_computed_value(clone)] attribute, but I think it is ok
to keep it like this for now.
This commit is contained in:
Anthony Ramine 2017-05-21 01:04:00 +02:00
parent a99e73ba6b
commit 07c0456cfd
7 changed files with 247 additions and 422 deletions
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25
components/style/values/generics/position.rs
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@ -5,9 +5,7 @@
//! Generic types for CSS handling of specified and computed values of
//! [`position`](https://drafts.csswg.org/css-backgrounds-3/#position)
use values::computed::{Context, ToComputedValue};
#[derive(Clone, Copy, Debug, HasViewportPercentage, PartialEq)]
#[derive(Clone, Copy, Debug, HasViewportPercentage, PartialEq, ToComputedValue)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
/// A generic type for representing a CSS [position](https://drafts.csswg.org/css-values/#position).
pub struct Position<H, V> {
@ -26,24 +24,3 @@ impl<H, V> Position<H, V> {
}
}
}
impl<H: ToComputedValue, V: ToComputedValue> ToComputedValue for Position<H, V> {
type ComputedValue = Position<<H as ToComputedValue>::ComputedValue,
<V as ToComputedValue>::ComputedValue>;
#[inline]
fn to_computed_value(&self, context: &Context) -> Self::ComputedValue {
Position {
horizontal: self.horizontal.to_computed_value(context),
vertical: self.vertical.to_computed_value(context),
}
}
#[inline]
fn from_computed_value(computed: &Self::ComputedValue) -> Self {
Self {
horizontal: ToComputedValue::from_computed_value(&computed.horizontal),
vertical: ToComputedValue::from_computed_value(&computed.vertical),
}
}
}