servo/components/style/values/generics/gecko.rs
2019-04-12 12:20:09 +02:00

44 lines
1.1 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 https://mozilla.org/MPL/2.0/. */
//! Generic types for legacy Gecko-only properties that should probably be
//! un-shipped at some point in the future.
/// A generic value for scroll snap points.
#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
#[derive(
Clone,
Copy,
Debug,
PartialEq,
SpecifiedValueInfo,
ToComputedValue,
ToCss,
ToResolvedValue,
ToShmem,
)]
pub enum ScrollSnapPoint<LengthPercentage> {
/// `none`
None,
/// `repeat(<length-or-percentage>)`
#[css(function)]
Repeat(LengthPercentage),
}
impl<L> ScrollSnapPoint<L> {
/// Returns `none`.
#[inline]
pub fn none() -> Self {
ScrollSnapPoint::None
}
/// Returns the repeat argument, if any.
#[inline]
pub fn repeated(&self) -> Option<&L> {
match *self {
ScrollSnapPoint::None => None,
ScrollSnapPoint::Repeat(ref length) => Some(length),
}
}
}