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7fe7b2ffb1
Most of types just derive it using proc_macro directly. Some of value types need manual impl. In my current plan, this new trait will be used in bug 1434130 to expose values as well. Bug: 1455576 Reviewed-by: emilio MozReview-Commit-ID: LI7fy45VkRw
35 lines
1 KiB
Rust
35 lines
1 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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//! Generic types for legacy Gecko-only properties that should probably be
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//! unshipped at some point in the future.
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/// A generic value for scroll snap points.
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#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
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#[derive(Clone, Copy, Debug, PartialEq, SpecifiedValueInfo, ToComputedValue,
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ToCss)]
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pub enum ScrollSnapPoint<LengthOrPercentage> {
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/// `none`
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None,
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/// `repeat(<length-or-percentage>)`
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#[css(function)]
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Repeat(LengthOrPercentage),
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}
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impl<L> ScrollSnapPoint<L> {
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/// Returns `none`.
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#[inline]
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pub fn none() -> Self {
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ScrollSnapPoint::None
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}
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/// Returns the repeat argument, if any.
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#[inline]
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pub fn repeated(&self) -> Option<&L> {
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match *self {
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ScrollSnapPoint::None => None,
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ScrollSnapPoint::Repeat(ref length) => Some(length),
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}
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}
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}
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