css_ast/functions/
circle_function.rs

1use super::prelude::*;
2use crate::{AtPosition, CalcableValue, LengthPercentage, RadialExtent};
3use css_parse::Box;
4
5/// <https://drafts.csswg.org/css-shapes/#funcdef-basic-shape-circle>
6///
7/// ```text,ignore
8/// <circle()> = circle(
9///   <radial-size>?
10///   [ at <position> ]?
11/// )
12/// ```
13#[node]
14#[derive(Parse, Peek, ToCursors, ToSpan, SemanticEq, Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
15#[cfg_attr(feature = "serde", derive(serde::Serialize), serde())]
16#[cfg_attr(feature = "visitable", derive(csskit_derives::Visitable), visit(self))]
17#[derive(csskit_derives::NodeWithMetadata)]
18pub struct CircleFunction<'a> {
19	#[atom(CssAtomSet::Circle)]
20	pub name: T![Function],
21	pub radius: Option<CircleRadius<'a>>,
22	pub at: Option<Box<'a, AtPosition<'a>>>,
23	#[semantic_eq(skip)]
24	pub close: T![')'],
25}
26
27/// <https://drafts.csswg.org/css-images-4/#typedef-radial-size>, restricted
28/// to the single-radius forms valid for `circle()`.
29///
30/// ```text,ignore
31/// <radial-extent> | <length-percentage [0,∞]>
32/// ```
33#[node]
34#[derive(Parse, Peek, ToCursors, ToSpan, SemanticEq, Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
35#[cfg_attr(feature = "serde", derive(serde::Serialize), serde())]
36#[cfg_attr(feature = "visitable", derive(csskit_derives::Visitable), visit(self))]
37#[derive(csskit_derives::NodeWithMetadata)]
38pub enum CircleRadius<'a> {
39	Extent(RadialExtent),
40	Length(CalcableValue<'a, LengthPercentage>),
41}
42
43#[cfg(test)]
44mod tests {
45	use super::*;
46	use crate::CssAtomSet;
47	use css_parse::{assert_parse, assert_parse_error, assert_peek_false};
48
49	#[test]
50	fn test_parses() {
51		assert_parse!(CssAtomSet::ATOMS, CircleFunction, "circle()");
52		assert_parse!(CssAtomSet::ATOMS, CircleFunction, "circle(50%)");
53		assert_parse!(CssAtomSet::ATOMS, CircleFunction, "circle(50px at right center)");
54		assert_parse!(CssAtomSet::ATOMS, CircleFunction, "circle(closest-side at 5rem 6rem)");
55		assert_parse!(CssAtomSet::ATOMS, CircleFunction, "circle(at center)");
56		assert_parse!(CssAtomSet::ATOMS, CircleFunction, "circle(calc(50% - 10px))");
57		assert_parse!(CssAtomSet::ATOMS, CircleFunction, "circle(var(--r) at center)");
58	}
59
60	#[test]
61	fn test_errors() {
62		assert_peek_false!(CssAtomSet::ATOMS, CircleFunction, "ellipse(10px)");
63		assert_parse_error!(CssAtomSet::ATOMS, CircleFunction, "circle(50px 50px)");
64	}
65}
css_ast/functions/circle_function.rs

css_ast/functions/
circle_function.rs
