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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/. */
//! Common feature values between media and container features.
use app_units::Au;
use euclid::default::Size2D;
/// The orientation media / container feature.
/// https://drafts.csswg.org/mediaqueries-5/#orientation
/// https://drafts.csswg.org/css-contain-3/#orientation
#[derive(Clone, Copy, Debug, FromPrimitive, Parse, ToCss)]
#[repr(u8)]
#[allow(missing_docs)]
pub enum Orientation {
Portrait,
Landscape,
}
impl Orientation {
/// A helper to evaluate a orientation query given a generic size getter.
pub fn eval(size: Size2D<Au>, value: Option<Self>) -> bool {
let query_orientation = match value {
Some(v) => v,
None => return true,
};
// Per spec, square viewports should be 'portrait'
let is_landscape = size.width > size.height;
match query_orientation {
Self::Landscape => is_landscape,
Self::Portrait => !is_landscape,
}
}
}
/// Values for the prefers-color-scheme media feature.
#[derive(Clone, Copy, Debug, FromPrimitive, Parse, PartialEq, ToCss)]
#[repr(u8)]
#[allow(missing_docs)]
pub enum PrefersColorScheme {
Light,
Dark,
}
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