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style: Be a bit more explicit about background-size.

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We have a ton of ad-hoc `From` impls which seem overly generic, I think.
This commit is contained in:
Emilio Cobos Álvarez 2017-09-16 17:14:38 +02:00
parent 2ac1327e4b
commit 7e4338eed8
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4 changed files with 23 additions and 12 deletions
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12
components/style/values/specified/background.rs
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@ -20,7 +20,7 @@ impl Parse for BackgroundSize {
let height = input
.try(|i| LengthOrPercentageOrAuto::parse_non_negative(context, i))
.unwrap_or(LengthOrPercentageOrAuto::Auto);
return Ok(GenericBackgroundSize::Explicit { width: width, height: height });
return Ok(GenericBackgroundSize::Explicit { width, height });
}
let ident = input.expect_ident()?;
(match_ignore_ascii_case! { &ident,
@ -30,3 +30,13 @@ impl Parse for BackgroundSize {
}).map_err(|()| SelectorParseError::UnexpectedIdent(ident.clone()).into())
}
}
impl BackgroundSize {
/// Returns `auto auto`.
pub fn auto() -> Self {
GenericBackgroundSize::Explicit {
width: LengthOrPercentageOrAuto::Auto,
height: LengthOrPercentageOrAuto::Auto,
}
}
}