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f0f3eb3194
Replace LengthOrPercentage with NonNegativeLengthOrPercentage on ShapeRadius, Circle, Ellipse. And derive ToAnimatedValue for ShapeSource and its related types, so we clamp its interpolated results into non-negative values. (i.e. The radius of circle()/ellipse() and the border-radius of inset().) Note: We may get negative values when using a negative easing function, so the clamp is necessary to avoid the incorrect result or any undefined behavior. Differential Revision: https://phabricator.services.mozilla.com/D14654
81 lines
1.9 KiB
Rust
81 lines
1.9 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 handling of specified and computed values of
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//! [`position`](https://drafts.csswg.org/css-backgrounds-3/#position)
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/// A generic type for representing a CSS [position](https://drafts.csswg.org/css-values/#position).
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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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)]
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pub struct Position<H, V> {
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/// The horizontal component of position.
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pub horizontal: H,
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/// The vertical component of position.
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pub vertical: V,
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}
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impl<H, V> Position<H, V> {
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/// Returns a new position.
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pub fn new(horizontal: H, vertical: V) -> Self {
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Self {
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horizontal: horizontal,
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vertical: vertical,
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}
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}
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}
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/// A generic value for the `z-index` 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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ToAnimatedZero,
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ToComputedValue,
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ToCss,
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)]
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pub enum ZIndex<Integer> {
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/// An integer value.
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Integer(Integer),
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/// The keyword `auto`.
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Auto,
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}
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impl<Integer> ZIndex<Integer> {
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/// Returns `auto`
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#[inline]
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pub fn auto() -> Self {
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ZIndex::Auto
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}
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/// Returns whether `self` is `auto`.
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#[inline]
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pub fn is_auto(self) -> bool {
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matches!(self, ZIndex::Auto)
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}
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/// Returns the integer value if it is an integer, or `auto`.
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#[inline]
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pub fn integer_or(self, auto: Integer) -> Integer {
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match self {
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ZIndex::Integer(n) => n,
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ZIndex::Auto => auto,
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}
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}
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}
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