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use super::{CssRuleList, Location};
use crate::error::{ParserError, PrinterError};
use crate::printer::Printer;
use crate::traits::{Parse, ToCss};
use crate::values::string::CowArcStr;
use cssparser::*;
use smallvec::SmallVec;
#[derive(Debug, Clone, PartialEq)]
pub struct LayerName<'i>(pub SmallVec<[CowArcStr<'i>; 1]>);
macro_rules! expect_non_whitespace {
($parser: ident, $($branches: tt)+) => {{
let start_location = $parser.current_source_location();
match *$parser.next_including_whitespace()? {
$($branches)+
ref token => {
return Err(start_location.new_basic_unexpected_token_error(token.clone()))
}
}
}}
}
impl<'i> Parse<'i> for LayerName<'i> {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
let mut parts = SmallVec::new();
let ident = input.expect_ident()?;
parts.push(ident.into());
loop {
let name = input.try_parse(|input| {
expect_non_whitespace! {input,
Token::Delim('.') => Ok(()),
}?;
expect_non_whitespace! {input,
Token::Ident(ref id) => Ok(id.into()),
}
});
match name {
Ok(name) => parts.push(name),
Err(_) => break,
}
}
Ok(LayerName(parts))
}
}
impl<'i> ToCss for LayerName<'i> {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
let mut first = true;
for name in &self.0 {
if first {
first = false;
} else {
dest.write_char('.')?;
}
dest.write_str(name)?;
}
Ok(())
}
}
#[derive(Debug, Clone, PartialEq)]
pub struct LayerStatementRule<'i> {
pub names: Vec<LayerName<'i>>,
pub loc: Location,
}
impl<'i> ToCss for LayerStatementRule<'i> {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
dest.add_mapping(self.loc);
dest.write_str("@layer ")?;
self.names.to_css(dest)?;
dest.write_char(';')
}
}
#[derive(Debug, Clone, PartialEq)]
pub struct LayerBlockRule<'i> {
pub name: Option<LayerName<'i>>,
pub rules: CssRuleList<'i>,
pub loc: Location,
}
impl<'i> ToCss for LayerBlockRule<'i> {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
dest.add_mapping(self.loc);
dest.write_str("@layer")?;
if let Some(name) = &self.name {
dest.write_char(' ')?;
name.to_css(dest)?;
}
dest.whitespace()?;
dest.write_char('{')?;
dest.indent();
dest.newline()?;
self.rules.to_css(dest)?;
dest.dedent();
dest.newline()?;
dest.write_char('}')
}
}