lightningcss/rules/
nesting.rs

1//! The `@nest` rule.
2
3use super::style::StyleRule;
4use super::Location;
5use super::MinifyContext;
6use crate::error::{MinifyError, PrinterError};
7use crate::parser::DefaultAtRule;
8use crate::printer::Printer;
9use crate::traits::ToCss;
10#[cfg(feature = "visitor")]
11use crate::visitor::Visit;
12/// A [@nest](https://www.w3.org/TR/css-nesting-1/#at-nest) rule.
13#[derive(Debug, PartialEq, Clone)]
14#[cfg_attr(feature = "visitor", derive(Visit))]
15#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
16#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
17#[cfg_attr(feature = "into_owned", derive(static_self::IntoOwned))]
18pub struct NestingRule<'i, R = DefaultAtRule> {
19  /// The style rule that defines the selector and declarations for the `@nest` rule.
20  #[cfg_attr(feature = "serde", serde(borrow))]
21  pub style: StyleRule<'i, R>,
22  /// The location of the rule in the source file.
23  #[cfg_attr(feature = "visitor", skip_visit)]
24  pub loc: Location,
25}
26
27impl<'i, T: Clone> NestingRule<'i, T> {
28  pub(crate) fn minify(
29    &mut self,
30    context: &mut MinifyContext<'_, 'i>,
31    parent_is_unused: bool,
32  ) -> Result<bool, MinifyError> {
33    self.style.minify(context, parent_is_unused)
34  }
35}
36
37impl<'a, 'i, T: ToCss> ToCss for NestingRule<'i, T> {
38  fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
39  where
40    W: std::fmt::Write,
41  {
42    #[cfg(feature = "sourcemap")]
43    dest.add_mapping(self.loc);
44    if dest.context().is_none() {
45      dest.write_str("@nest ")?;
46    }
47    self.style.to_css(dest)
48  }
49}
lightningcss/rules/nesting.rs

lightningcss/rules/
nesting.rs
