css_ast/units/
resolution.rs

1use super::prelude::*;
2
3// const DPPX_IN: f32 = 96.0;
4// const DPPX_CM: f32 = DPPX_IN / 2.54;
5
6/// <https://drafts.csswg.org/css-values/#resolution>
7///
8/// ```text,ignore
9/// <resolution> = <dimension-token>
10/// ```
11#[derive(
12	ToCursors, Parse, Peek, IntoCursor, ToSpan, SemanticEq, Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash,
13)]
14#[cfg_attr(feature = "serde", derive(serde::Serialize), serde())]
15#[cfg_attr(feature = "visitable", derive(csskit_derives::Visitable), visit(self))]
16#[derive(csskit_derives::NodeWithMetadata)]
17#[metadata(node_kinds = Dimension)]
18pub enum Resolution {
19	#[atom(CssAtomSet::Dpi)]
20	Dpi(T![Dimension]),
21	#[atom(CssAtomSet::Dpcm)]
22	Dpcm(T![Dimension]),
23	#[atom(CssAtomSet::Dppx)]
24	Dppx(T![Dimension]),
25	#[atom(CssAtomSet::X)]
26	X(T![Dimension]),
27}
28
29impl From<Resolution> for f32 {
30	fn from(res: Resolution) -> Self {
31		match res {
32			Resolution::Dpi(r) => r.into(),
33			Resolution::Dpcm(r) => r.into(),
34			Resolution::Dppx(r) => r.into(),
35			Resolution::X(r) => r.into(),
36		}
37	}
38}
39
40#[cfg(test)]
41mod tests {
42	use super::*;
43	use crate::CssAtomSet;
44	use css_parse::assert_parse;
45
46	#[test]
47	fn size_test() {
48		assert_eq!(std::mem::size_of::<Resolution>(), 16);
49	}
50
51	#[test]
52	fn test_writes() {
53		assert_parse!(CssAtomSet::ATOMS, Resolution, "1dppx");
54		assert_parse!(CssAtomSet::ATOMS, Resolution, "1x");
55	}
56}
css_ast/units/resolution.rs

css_ast/units/
resolution.rs
