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style: Let aspect-ratio (css-sizing-4) support 'auto | <ratio>'.

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In order to test its parsing and serialization, we expose it but protect
it behind a pref.

Besides, I would like to drop layout.css.aspect-ratio-number.enabled in
the next patch because the spec has been updated. It seems we don't have
to keep this pref and we should always use Number.

Differential Revision: https://phabricator.services.mozilla.com/D74955
This commit is contained in:
Boris Chiou 2020-05-21 06:45:10 +00:00 • committed by Emilio Cobos Álvarez
parent bd23e05c47
commit fc9321bb23
8 changed files with 185 additions and 18 deletions
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18
components/style/values/specified/mod.rs
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@ -18,9 +18,8 @@ use crate::context::QuirksMode;
use crate::parser::{Parse, ParserContext};
use crate::values::serialize_atom_identifier;
use crate::values::specified::calc::CalcNode;
use crate::{Atom, Namespace, Prefix, Zero};
use crate::{Atom, Namespace, One, Prefix, Zero};
use cssparser::{Parser, Token};
use num_traits::One;
use std::f32;
use std::fmt::{self, Write};
use std::ops::Add;
@ -72,6 +71,7 @@ pub use self::list::Quotes;
pub use self::motion::{OffsetPath, OffsetRotate};
pub use self::outline::OutlineStyle;
pub use self::percentage::Percentage;
pub use self::position::AspectRatio;
pub use self::position::{GridAutoFlow, GridTemplateAreas, MasonryAutoFlow, Position, PositionOrAuto};
pub use self::position::{PositionComponent, ZIndex};
pub use self::rect::NonNegativeLengthOrNumberRect;
@ -375,6 +375,18 @@ impl Parse for NonNegativeNumber {
}
}
impl One for NonNegativeNumber {
#[inline]
fn one() -> Self {
NonNegativeNumber::new(1.0)
}
#[inline]
fn is_one(&self) -> bool {
self.0.get() == 1.0
}
}
impl NonNegativeNumber {
/// Returns a new non-negative number with the value `val`.
pub fn new(val: CSSFloat) -> Self {
@ -537,7 +549,7 @@ impl Zero for Integer {
}
}
impl One for Integer {
impl num_traits::One for Integer {
#[inline]
fn one() -> Self {
Self::new(1)