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use super::style::StyleRule;
use super::Location;
use super::MinifyContext;
use crate::error::{MinifyError, PrinterError};
use crate::parser::DefaultAtRule;
use crate::printer::Printer;
use crate::rules::{StyleContext, ToCssWithContext};
use crate::traits::ToCss;
use crate::visitor::Visit;
#[derive(Debug, PartialEq, Clone, Visit)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct NestingRule<'i, R = DefaultAtRule> {
#[cfg_attr(feature = "serde", serde(borrow))]
pub style: StyleRule<'i, R>,
#[skip_visit]
pub loc: Location,
}
impl<'i, T> NestingRule<'i, T> {
pub(crate) fn minify(
&mut self,
context: &mut MinifyContext<'_, 'i>,
parent_is_unused: bool,
) -> Result<bool, MinifyError> {
self.style.minify(context, parent_is_unused)
}
}
impl<'a, 'i, T: ToCss> ToCssWithContext<'a, 'i, T> for NestingRule<'i, T> {
fn to_css_with_context<W>(
&self,
dest: &mut Printer<W>,
context: Option<&StyleContext<'a, 'i, T>>,
) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
dest.add_mapping(self.loc);
if context.is_none() {
dest.write_str("@nest ")?;
}
self.style.to_css_with_context(dest, context)
}
}