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-rw-r--r--servo/components/style/values/generics/background.rs54
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diff --git a/servo/components/style/values/generics/background.rs b/servo/components/style/values/generics/background.rs
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+/* 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 https://mozilla.org/MPL/2.0/. */
+
+//! Generic types for CSS values related to backgrounds.
+
+use crate::values::generics::length::{GenericLengthPercentageOrAuto, LengthPercentageOrAuto};
+
+/// A generic value for the `background-size` property.
+#[derive(
+ Animate,
+ Clone,
+ ComputeSquaredDistance,
+ Copy,
+ Debug,
+ MallocSizeOf,
+ PartialEq,
+ SpecifiedValueInfo,
+ ToAnimatedValue,
+ ToAnimatedZero,
+ ToComputedValue,
+ ToCss,
+ ToResolvedValue,
+ ToShmem,
+)]
+#[repr(C, u8)]
+pub enum GenericBackgroundSize<LengthPercent> {
+ /// `<width> <height>`
+ ExplicitSize {
+ /// Explicit width.
+ width: GenericLengthPercentageOrAuto<LengthPercent>,
+ /// Explicit height.
+ #[css(skip_if = "GenericLengthPercentageOrAuto::is_auto")]
+ height: GenericLengthPercentageOrAuto<LengthPercent>,
+ },
+ /// `cover`
+ #[animation(error)]
+ Cover,
+ /// `contain`
+ #[animation(error)]
+ Contain,
+}
+
+pub use self::GenericBackgroundSize as BackgroundSize;
+
+impl<LengthPercentage> BackgroundSize<LengthPercentage> {
+ /// Returns `auto auto`.
+ pub fn auto() -> Self {
+ GenericBackgroundSize::ExplicitSize {
+ width: LengthPercentageOrAuto::Auto,
+ height: LengthPercentageOrAuto::Auto,
+ }
+ }
+}