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style: Let overflow parse two values.

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Per https://github.com/w3c/csswg-drafts/issues/2484.

Bug: 1453148
Reviewed-by: xidorn
MozReview-Commit-ID: D7M3PhnTtD2
This commit is contained in:
Emilio Cobos Álvarez 2018-04-10 18:40:22 +02:00
parent ec6f71e8fa
commit 061c87ad00
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GPG key ID: 056B727BB9C1027C
3 changed files with 15 additions and 45 deletions
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24
components/style/properties/shorthand/box.mako.rs
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@ -4,8 +4,11 @@
<%namespace name="helpers" file="/helpers.mako.rs" />
<%helpers:shorthand name="overflow" sub_properties="overflow-x overflow-y"
spec="https://drafts.csswg.org/css-overflow/#propdef-overflow">
<%helpers:shorthand
name="overflow"
sub_properties="overflow-x overflow-y"
spec="https://drafts.csswg.org/css-overflow/#propdef-overflow"
>
use properties::longhands::overflow_x::parse as parse_overflow;
% if product == "gecko":
use properties::longhands::overflow_x::SpecifiedValue;
@ -42,20 +45,23 @@
return moz_kw_found
}
% endif
let overflow = parse_overflow(context, input)?;
let overflow_x = parse_overflow(context, input)?;
let overflow_y =
input.try(|i| parse_overflow(context, i)).unwrap_or(overflow_x);
Ok(expanded! {
overflow_x: overflow,
overflow_y: overflow,
overflow_x: overflow_x,
overflow_y: overflow_y,
})
}
impl<'a> ToCss for LonghandsToSerialize<'a> {
fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result where W: fmt::Write {
if self.overflow_x == self.overflow_y {
self.overflow_x.to_css(dest)
} else {
Ok(())
self.overflow_x.to_css(dest)?;
if self.overflow_x != self.overflow_y {
dest.write_char(' ')?;
self.overflow_y.to_css(dest)?;
}
Ok(())
}
}
</%helpers:shorthand>