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63 lines
1.8 KiB
Rust
63 lines
1.8 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 https://mozilla.org/MPL/2.0/. */
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//! Generic types for CSS values related to backgrounds.
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use crate::values::generics::length::{GenericLengthPercentageOrAuto, LengthPercentageOrAuto};
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fn width_and_height_are_auto<L>(
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width: &LengthPercentageOrAuto<L>,
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height: &LengthPercentageOrAuto<L>,
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) -> bool {
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width.is_auto() && height.is_auto()
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}
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/// A generic value for the `background-size` property.
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#[derive(
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Animate,
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Clone,
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ComputeSquaredDistance,
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Copy,
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Debug,
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MallocSizeOf,
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PartialEq,
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SpecifiedValueInfo,
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ToAnimatedValue,
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ToAnimatedZero,
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ToComputedValue,
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ToCss,
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ToShmem,
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)]
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#[repr(C, u8)]
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pub enum GenericBackgroundSize<LengthPercent> {
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/// `<width> <height>`
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ExplicitSize {
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/// Explicit width.
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width: GenericLengthPercentageOrAuto<LengthPercent>,
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/// Explicit height.
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/// NOTE(emilio): We should probably simplify all these in case `width`
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/// and `height` are the same, but all other browsers agree on only
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/// special-casing `auto`.
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#[css(contextual_skip_if = "width_and_height_are_auto")]
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height: GenericLengthPercentageOrAuto<LengthPercent>,
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},
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/// `cover`
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#[animation(error)]
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Cover,
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/// `contain`
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#[animation(error)]
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Contain,
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}
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pub use self::GenericBackgroundSize as BackgroundSize;
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impl<LengthPercentage> BackgroundSize<LengthPercentage> {
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/// Returns `auto auto`.
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pub fn auto() -> Self {
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GenericBackgroundSize::ExplicitSize {
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width: LengthPercentageOrAuto::Auto,
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height: LengthPercentageOrAuto::Auto,
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}
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}
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}
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