oxc_css_parser/parser/at_rule/
page.rs

1use super::Parser;
2use crate::{
3    Parse,
4    ast::*,
5    error::PResult,
6    pos::Span,
7    tokenizer::{Token, TokenWithSpan},
8    util,
9};
10
11// https://www.w3.org/TR/css-page-3/#syntax-page-selector
12//
13// <page-selector> = [ <ident-token>? <pseudo-page>* ]!
14impl<'a> Parse<'a> for PageSelector<'a> {
15    fn parse(input: &mut Parser<'a>) -> PResult<Self> {
16        let mut name = None;
17        let mut pseudo = input.vec();
18        let start;
19        let mut end;
20
21        if let Token::Colon(..) = &input.cursor.peek()?.token {
22            let first = input.parse::<PseudoPage>()?;
23            start = first.span.start;
24            end = first.span.end;
25            pseudo.push(first);
26        } else {
27            let ident = input.parse::<InterpolableIdent>()?;
28            let ident_span = ident.span();
29            start = ident_span.start;
30            end = ident_span.end;
31            name = Some(ident)
32        }
33
34        loop {
35            match input.cursor.peek()? {
36                TokenWithSpan { token: Token::Colon(..), span } if span.start == end => {
37                    let item = input.parse::<PseudoPage>()?;
38                    end = item.span.end;
39                    pseudo.push(item);
40                }
41                _ => break,
42            }
43        }
44
45        Ok(PageSelector { name, pseudo, span: Span { start, end } })
46    }
47}
48
49// <page-selector-list> = <page-selector>#
50impl<'a> Parse<'a> for PageSelectorList<'a> {
51    fn parse(input: &mut Parser<'a>) -> PResult<Self> {
52        let first = input.parse::<PageSelector>()?;
53        let mut span = first.span.clone();
54
55        let mut selectors = input.vec1(first);
56        let mut comma_spans = input.vec();
57        while let Some((_, comma_span)) = input.cursor.eat_comma()? {
58            comma_spans.push(comma_span);
59            selectors.push(input.parse()?);
60        }
61
62        if let Some(last) = selectors.last() {
63            span.end = last.span.end;
64        }
65        Ok(PageSelectorList { selectors, comma_spans, span })
66    }
67}
68
69// <pseudo-page> = ':' [ left | right | first | blank ]
70impl<'a> Parse<'a> for PseudoPage<'a> {
71    fn parse(input: &mut Parser<'a>) -> PResult<Self> {
72        let (_, colon_span) = input.cursor.expect_colon()?;
73        let name = input.parse::<InterpolableIdent>()?;
74
75        let name_span = name.span();
76        util::assert_no_ws_or_comment(&colon_span, name_span)?;
77
78        let span = Span { start: colon_span.start, end: name_span.end };
79        Ok(PseudoPage { name, span })
80    }
81}
oxc_css_parser/parser/at_rule/page.rs

oxc_css_parser/parser/at_rule/
page.rs
