style/queries/
values.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
4
5//! Common feature values between media and container features.
6
7use crate::derives::*;
8use app_units::Au;
9use euclid::default::Size2D;
10
11/// The orientation media / container feature.
12/// https://drafts.csswg.org/mediaqueries-5/#orientation
13/// https://drafts.csswg.org/css-contain-3/#orientation
14#[derive(Clone, Copy, Debug, FromPrimitive, Parse, ToCss)]
15#[repr(u8)]
16#[allow(missing_docs)]
17pub enum Orientation {
18    Portrait,
19    Landscape,
20}
21
22impl Orientation {
23    /// A helper to evaluate a orientation query given a generic size getter.
24    pub fn eval(size: Size2D<Au>, value: Option<Self>) -> bool {
25        let query_orientation = match value {
26            Some(v) => v,
27            None => return true,
28        };
29
30        // Per spec, square viewports should be 'portrait'
31        let is_landscape = size.width > size.height;
32        match query_orientation {
33            Self::Landscape => is_landscape,
34            Self::Portrait => !is_landscape,
35        }
36    }
37}
38
39/// Values for the prefers-color-scheme media feature.
40#[derive(Clone, Copy, Debug, FromPrimitive, Parse, PartialEq, ToCss)]
41#[repr(u8)]
42#[allow(missing_docs)]
43pub enum PrefersColorScheme {
44    Light,
45    Dark,
46}
style/queries/values.rs

style/queries/
values.rs
