mirror of
https://github.com/servo/servo.git
synced 2025-10-12 22:40:19 +01:00
104 lines
3.5 KiB
Rust
104 lines
3.5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
//! Specified types for CSS values related to backgrounds.
|
|
|
|
use cssparser::Parser;
|
|
use parser::{Parse, ParserContext};
|
|
use selectors::parser::SelectorParseErrorKind;
|
|
use style_traits::ParseError;
|
|
use values::generics::background::BackgroundSize as GenericBackgroundSize;
|
|
use values::specified::length::LengthOrPercentageOrAuto;
|
|
|
|
/// A specified value for the `background-size` property.
|
|
pub type BackgroundSize = GenericBackgroundSize<LengthOrPercentageOrAuto>;
|
|
|
|
impl Parse for BackgroundSize {
|
|
fn parse<'i, 't>(
|
|
context: &ParserContext,
|
|
input: &mut Parser<'i, 't>,
|
|
) -> Result<Self, ParseError<'i>> {
|
|
if let Ok(width) = input.try(|i| LengthOrPercentageOrAuto::parse_non_negative(context, i)) {
|
|
let height = input
|
|
.try(|i| LengthOrPercentageOrAuto::parse_non_negative(context, i))
|
|
.unwrap_or(LengthOrPercentageOrAuto::Auto);
|
|
return Ok(GenericBackgroundSize::Explicit { width, height });
|
|
}
|
|
let location = input.current_source_location();
|
|
let ident = input.expect_ident()?;
|
|
(match_ignore_ascii_case! { &ident,
|
|
"cover" => Ok(GenericBackgroundSize::Cover),
|
|
"contain" => Ok(GenericBackgroundSize::Contain),
|
|
_ => Err(()),
|
|
}).map_err(|()| location.new_custom_error(SelectorParseErrorKind::UnexpectedIdent(ident.clone())))
|
|
}
|
|
}
|
|
|
|
impl BackgroundSize {
|
|
/// Returns `auto auto`.
|
|
pub fn auto() -> Self {
|
|
GenericBackgroundSize::Explicit {
|
|
width: LengthOrPercentageOrAuto::Auto,
|
|
height: LengthOrPercentageOrAuto::Auto,
|
|
}
|
|
}
|
|
}
|
|
|
|
/// One of the keywords for `background-repeat`.
|
|
#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq, ToComputedValue, ToCss)]
|
|
#[allow(missing_docs)]
|
|
pub enum BackgroundRepeatKeyword {
|
|
Repeat,
|
|
Space,
|
|
Round,
|
|
NoRepeat,
|
|
}
|
|
|
|
/// The specified value for the `background-repeat` property.
|
|
///
|
|
/// https://drafts.csswg.org/css-backgrounds/#the-background-repeat
|
|
#[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq, ToCss)]
|
|
pub enum BackgroundRepeat {
|
|
/// `repeat-x`
|
|
RepeatX,
|
|
/// `repeat-y`
|
|
RepeatY,
|
|
/// `[repeat | space | round | no-repeat]{1,2}`
|
|
Keywords(BackgroundRepeatKeyword, Option<BackgroundRepeatKeyword>),
|
|
}
|
|
|
|
impl BackgroundRepeat {
|
|
/// Returns the `repeat` value.
|
|
#[inline]
|
|
pub fn repeat() -> Self {
|
|
BackgroundRepeat::Keywords(BackgroundRepeatKeyword::Repeat, None)
|
|
}
|
|
}
|
|
|
|
impl Parse for BackgroundRepeat {
|
|
fn parse<'i, 't>(
|
|
_context: &ParserContext,
|
|
input: &mut Parser<'i, 't>,
|
|
) -> Result<Self, ParseError<'i>> {
|
|
let ident = input.expect_ident_cloned()?;
|
|
|
|
match_ignore_ascii_case! { &ident,
|
|
"repeat-x" => return Ok(BackgroundRepeat::RepeatX),
|
|
"repeat-y" => return Ok(BackgroundRepeat::RepeatY),
|
|
_ => {},
|
|
}
|
|
|
|
let horizontal = match BackgroundRepeatKeyword::from_ident(&ident) {
|
|
Ok(h) => h,
|
|
Err(()) => {
|
|
return Err(input.new_custom_error(
|
|
SelectorParseErrorKind::UnexpectedIdent(ident.clone())
|
|
));
|
|
}
|
|
};
|
|
|
|
let vertical = input.try(BackgroundRepeatKeyword::parse).ok();
|
|
Ok(BackgroundRepeat::Keywords(horizontal, vertical))
|
|
}
|
|
}
|