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style: Add computed value ZeroToOneNumber.

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Correctly handle clamping to 1 behavior of grayscale(),
invert(), opacity() and sepia().

Differential Revision: https://phabricator.services.mozilla.com/D35509
This commit is contained in:
violet 2019-06-23 23:01:47 +00:00 • committed by Emilio Cobos Álvarez
parent 9939c1ee07
commit 2fba62aba9
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GPG key ID: E1152D0994E4BF8A
6 changed files with 132 additions and 73 deletions
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26
components/style/values/computed/mod.rs
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@ -10,7 +10,7 @@ use super::generics::grid::GridTemplateComponent as GenericGridTemplateComponent
use super::generics::grid::{GridLine as GenericGridLine, TrackBreadth as GenericTrackBreadth};
use super::generics::grid::{TrackList as GenericTrackList, TrackSize as GenericTrackSize};
use super::generics::transform::IsParallelTo;
use super::generics::{self, GreaterThanOrEqualToOne, NonNegative};
use super::generics::{self, GreaterThanOrEqualToOne, NonNegative, ZeroToOne};
use super::specified;
use super::{CSSFloat, CSSInteger};
use crate::context::QuirksMode;
@ -519,6 +519,30 @@ impl From<NonNegativeNumber> for CSSFloat {
}
}
/// A wrapper of Number, but the value between 0 and 1
pub type ZeroToOneNumber = ZeroToOne<CSSFloat>;
impl ToAnimatedValue for ZeroToOneNumber {
type AnimatedValue = CSSFloat;
#[inline]
fn to_animated_value(self) -> Self::AnimatedValue {
self.0
}
#[inline]
fn from_animated_value(animated: Self::AnimatedValue) -> Self {
Self(animated.max(0.).min(1.))
}
}
impl From<CSSFloat> for ZeroToOneNumber {
#[inline]
fn from(number: CSSFloat) -> Self {
Self(number)
}
}
/// A wrapper of Number, but the value >= 1.
pub type GreaterThanOrEqualToOneNumber = GreaterThanOrEqualToOne<CSSFloat>;