style: Add a Zero trait that doesn't require Add, and use it in place of num_traits and IsZeroLength.

Use it to be consistent in InsetRect serialization and storage between Servo and
Gecko.

Differential Revision: https://phabricator.services.mozilla.com/D21493
This commit is contained in:
Emilio Cobos Álvarez 2019-02-28 19:03:03 +00:00
parent 4496411edc
commit 7d01114cbf
29 changed files with 179 additions and 186 deletions

View file

@ -18,6 +18,7 @@ use crate::values::specified::position::{HorizontalPosition, Position, VerticalP
use crate::values::specified::url::SpecifiedUrl;
use crate::values::specified::SVGPathData;
use crate::values::specified::{LengthPercentage, NonNegativeLengthPercentage};
use crate::Zero;
use cssparser::Parser;
use std::fmt::{self, Write};
use style_traits::{CssWriter, ParseError, StyleParseErrorKind, ToCss};
@ -202,9 +203,9 @@ impl InsetRect {
) -> Result<Self, ParseError<'i>> {
let rect = Rect::parse_with(context, input, LengthPercentage::parse)?;
let round = if input.try(|i| i.expect_ident_matching("round")).is_ok() {
Some(BorderRadius::parse(context, input)?)
BorderRadius::parse(context, input)?
} else {
None
BorderRadius::zero()
};
Ok(generic::InsetRect { rect, round })
}