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

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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
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5
components/style/properties/properties.mako.rs
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@ -42,6 +42,7 @@ use crate::values::computed;
use crate::values::computed::NonNegativeLength;
use crate::values::serialize_atom_name;
use crate::rule_tree::StrongRuleNode;
use crate::Zero;
use self::computed_value_flags::*;
use crate::str::{CssString, CssStringBorrow, CssStringWriter};
@ -2585,7 +2586,7 @@ pub mod style_structs {
/// Whether the border-${side} property has nonzero width.
#[allow(non_snake_case)]
pub fn border_${side}_has_nonzero_width(&self) -> bool {
self.border_${side}_width != NonNegativeLength::zero()
!self.border_${side}_width.is_zero()
}
% endfor
% elif style_struct.name == "Font":
@ -2624,7 +2625,7 @@ pub mod style_structs {
/// Whether the outline-width property is non-zero.
#[inline]
pub fn outline_has_nonzero_width(&self) -> bool {
self.outline_width != NonNegativeLength::zero()
!self.outline_width.is_zero()
}
% elif style_struct.name == "Text":
/// Whether the text decoration has an underline.