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style: Add AngleOrPercentage to style system.

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Differential Revision: https://phabricator.services.mozilla.com/D62158
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Tim Nguyen 2020-02-09 15:11:43 +00:00 • committed by Emilio Cobos Álvarez
parent 97382a2c41
commit 5ed8fe8ee2
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3 changed files with 93 additions and 3 deletions
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43
components/style/values/specified/mod.rs
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@ -31,7 +31,7 @@ use style_traits::{CssWriter, ParseError, SpecifiedValueInfo, StyleParseErrorKin
pub use self::align::{AlignContent, AlignItems, AlignSelf, ContentDistribution};
#[cfg(feature = "gecko")]
pub use self::align::{JustifyContent, JustifyItems, JustifySelf, SelfAlignment};
pub use self::angle::Angle;
pub use self::angle::{Angle, AllowUnitlessZeroAngle};
pub use self::background::{BackgroundRepeat, BackgroundSize};
pub use self::basic_shape::FillRule;
pub use self::border::{BorderCornerRadius, BorderImageSlice, BorderImageWidth};
@ -130,6 +130,47 @@ pub mod transform;
pub mod ui;
pub mod url;
/// <angle> | <percentage>
/// https://drafts.csswg.org/css-values/#typedef-angle-percentage
#[allow(missing_docs)]
#[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq, SpecifiedValueInfo, ToCss, ToShmem)]
pub enum AngleOrPercentage {
Percentage(Percentage),
Angle(Angle),
}
impl AngleOrPercentage {
fn parse_internal<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
allow_unitless_zero: AllowUnitlessZeroAngle,
) -> Result<Self, ParseError<'i>> {
if let Ok(per) = input.try(|i| Percentage::parse(context, i)) {
return Ok(AngleOrPercentage::Percentage(per));
}
Angle::parse_internal(context, input, allow_unitless_zero).map(AngleOrPercentage::Angle)
}
/// Allow unitless angles, used for conic-gradients as specified by the spec.
/// https://drafts.csswg.org/css-images-4/#valdef-conic-gradient-angle
pub fn parse_with_unitless<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
) -> Result<Self, ParseError<'i>> {
AngleOrPercentage::parse_internal(context, input, AllowUnitlessZeroAngle::Yes)
}
}
impl Parse for AngleOrPercentage {
fn parse<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
) -> Result<Self, ParseError<'i>> {
AngleOrPercentage::parse_internal(context, input, AllowUnitlessZeroAngle::No)
}
}
/// Parse a `<number>` value, with a given clamping mode.
fn parse_number_with_clamping_mode<'i, 't>(
context: &ParserContext,