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style: Introduce Qualifier::parse.

Browse source 
Bug: 1468846
Reviewed-by: xidorn
MozReview-Commit-ID: 4IOJpaS9ijI
This commit is contained in:
Emilio Cobos Álvarez 2018-06-14 13:38:47 -07:00
parent c7b36fb43f
commit 67d8bfb720
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1 changed files with 2 additions and 15 deletions
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17
components/style/media_queries/mod.rs
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@ -24,7 +24,7 @@ pub use servo::media_queries::{Device, Expression};
pub use gecko::media_queries::{Device, Expression};
/// <https://drafts.csswg.org/mediaqueries/#mq-prefix>
#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, PartialEq, ToCss)]
#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, PartialEq, Parse, ToCss)]
pub enum Qualifier {
/// Hide a media query from legacy UAs:
/// <https://drafts.csswg.org/mediaqueries/#mq-only>
@ -168,20 +168,7 @@ impl MediaQuery {
) -> Result<MediaQuery, ParseError<'i>> {
let mut expressions = vec![];
let qualifier = if input
.try(|input| input.expect_ident_matching("only"))
.is_ok()
{
Some(Qualifier::Only)
} else if input
.try(|input| input.expect_ident_matching("not"))
.is_ok()
{
Some(Qualifier::Not)
} else {
None
};
let qualifier = input.try(Qualifier::parse).ok();
let media_type = match input.try(|i| i.expect_ident_cloned()) {
Ok(ident) => MediaQueryType::parse(&*ident).map_err(|()| {
input.new_custom_error(SelectorParseErrorKind::UnexpectedIdent(ident.clone()))