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style: Add (unused for now) parsing for support conditions in @import

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You can use this as:

  input.try_parse(SupportsCondition::parse_for_import).ok()

Or so.

Differential Revision: https://phabricator.services.mozilla.com/D172668
This commit is contained in:
Emilio Cobos Álvarez 2023-03-15 12:41:26 +00:00 • committed by Martin Robinson
parent 3914ff627e
commit a68766197f
1 changed files with 10 additions and 3 deletions
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13
components/style/stylesheets/supports_rule.rs
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@ -186,11 +186,18 @@ impl SupportsCondition {
}
}
/// Parses an `@import` condition as per
/// https://drafts.csswg.org/css-cascade-5/#typedef-import-conditions
pub fn parse_for_import<'i, 't>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
input.expect_function_matching("supports")?;
input.parse_nested_block(parse_condition_or_declaration)
}
/// <https://drafts.csswg.org/css-conditional-3/#supports_condition_in_parens>
fn parse_in_parens<'i, 't>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
// Whitespace is normally taken care of in `Parser::next`,
// but we want to not include it in `pos` for the SupportsCondition::FutureSyntax cases.
while input.try_parse(Parser::expect_whitespace).is_ok() {}
// Whitespace is normally taken care of in `Parser::next`, but we want to not include it in
// `pos` for the SupportsCondition::FutureSyntax cases.
input.skip_whitespace();
let pos = input.position();
let location = input.current_source_location();
match *input.next()? {