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use crate::values::string::CowArcStr;
use cssparser::*;
use super::Location;
use crate::traits::{Parse, ToCss};
use crate::declaration::DeclarationBlock;
use crate::printer::Printer;
use crate::macros::enum_property;
use crate::error::{ParserError, PrinterError};
#[derive(Debug, PartialEq, Clone)]
pub struct PageSelector<'i> {
pub name: Option<CowArcStr<'i>>,
pub pseudo_classes: Vec<PagePseudoClass>
}
enum_property! {
pub enum PagePseudoClass {
Left,
Right,
First,
Last,
Blank,
}
}
impl<'i> Parse<'i> for PageSelector<'i> {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
let name = input.try_parse(|input| input.expect_ident().map(|x| x.into())).ok();
let mut pseudo_classes = vec![];
loop {
let state = input.state();
match input.next_including_whitespace() {
Ok(Token::Colon) => {
pseudo_classes.push(PagePseudoClass::parse(input)?);
}
_ => {
input.reset(&state);
break
}
}
}
if name.is_none() && pseudo_classes.is_empty() {
return Err(input.new_custom_error(ParserError::InvalidPageSelector))
}
Ok(PageSelector {
name,
pseudo_classes
})
}
}
#[derive(Debug, PartialEq, Clone)]
pub struct PageRule<'i> {
pub selectors: Vec<PageSelector<'i>>,
pub declarations: DeclarationBlock<'i>,
pub loc: Location
}
impl<'i> ToCss for PageRule<'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("@page")?;
if let Some(first) = self.selectors.first() {
if !dest.minify || first.name.is_some() {
dest.write_char(' ')?;
}
let mut first = true;
for selector in &self.selectors {
if first {
first = false;
} else {
dest.delim(',', false)?;
}
selector.to_css(dest)?;
}
}
self.declarations.to_css(dest)
}
}
impl<'i> ToCss for PageSelector<'i> {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError> where W: std::fmt::Write {
if let Some(name) = &self.name {
dest.write_str(&name)?;
}
for pseudo in &self.pseudo_classes {
dest.write_char(':')?;
pseudo.to_css(dest)?;
}
Ok(())
}
}