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32 lines
1.5 KiB
Rust
32 lines
1.5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Specified types for CSS values related to backgrounds.
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use cssparser::Parser;
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use parser::{Parse, ParserContext};
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use selectors::parser::SelectorParseError;
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use style_traits::ParseError;
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use values::generics::background::BackgroundSize as GenericBackgroundSize;
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use values::specified::length::LengthOrPercentageOrAuto;
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/// A specified value for the `background-size` property.
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pub type BackgroundSize = GenericBackgroundSize<LengthOrPercentageOrAuto>;
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impl Parse for BackgroundSize {
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fn parse<'i, 't>(context: &ParserContext, input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
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if let Ok(width) = input.try(|i| LengthOrPercentageOrAuto::parse_non_negative(context, i)) {
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let height = input
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.try(|i| LengthOrPercentageOrAuto::parse_non_negative(context, i))
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.unwrap_or(LengthOrPercentageOrAuto::Auto);
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return Ok(GenericBackgroundSize::Explicit { width: width, height: height });
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}
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let ident = input.expect_ident()?;
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(match_ignore_ascii_case! { &ident,
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"cover" => Ok(GenericBackgroundSize::Cover),
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"contain" => Ok(GenericBackgroundSize::Contain),
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_ => Err(()),
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}).map_err(|()| SelectorParseError::UnexpectedIdent(ident).into())
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}
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}
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