Move around specificity computation so that we know it by the time we mint the Selector.

This is important to make the selector immutable, which needs to happen when we stick it in an Arc.

MozReview-Commit-ID: BaMbOEbYC3D
This commit is contained in:
Bobby Holley 2017-06-01 17:03:35 -07:00
parent 1281fd9353
commit 992059c856

View file

@ -841,13 +841,13 @@ impl From<Specificity> for u32 {
}
}
fn specificity<Impl>(complex_selector: &Selector<Impl>) -> u32
fn specificity<Impl>(iter: SelectorIter<Impl>) -> u32
where Impl: SelectorImpl
{
complex_selector_specificity(complex_selector).into()
complex_selector_specificity(iter).into()
}
fn complex_selector_specificity<Impl>(selector: &Selector<Impl>)
fn complex_selector_specificity<Impl>(mut iter: SelectorIter<Impl>)
-> Specificity
where Impl: SelectorImpl
{
@ -896,9 +896,7 @@ fn complex_selector_specificity<Impl>(selector: &Selector<Impl>)
}
}
let mut specificity = Default::default();
let mut iter = selector.iter();
loop {
for simple_selector in &mut iter {
simple_selector_specificity(&simple_selector, &mut specificity);
@ -917,12 +915,7 @@ fn complex_selector_specificity<Impl>(selector: &Selector<Impl>)
fn parse_selector<P, Impl>(parser: &P, input: &mut CssParser) -> Result<Selector<Impl>, ()>
where P: Parser<Impl=Impl>, Impl: SelectorImpl
{
let (mut selector, has_pseudo_element) = parse_complex_selector(parser, input)?;
let mut specificity = specificity(&selector);
if has_pseudo_element {
specificity |= HAS_PSEUDO_BIT;
}
selector.1 = specificity;
let selector = parse_complex_selector(parser, input)?;
Ok(selector)
}
@ -944,7 +937,7 @@ type ParseVec<Impl> = SmallVec<[Component<Impl>; 8]>;
fn parse_complex_selector<P, Impl>(
parser: &P,
input: &mut CssParser)
-> Result<(Selector<Impl>, bool), ()>
-> Result<Selector<Impl>, ()>
where P: Parser<Impl=Impl>, Impl: SelectorImpl
{
let mut sequence = ParseVec::new();
@ -992,21 +985,28 @@ fn parse_complex_selector<P, Impl>(
sequence.push(Component::Combinator(combinator));
}
let complex = Selector(ArcSlice::new(sequence.into_vec().into_boxed_slice()), 0);
Ok((complex, parsed_pseudo_element))
let mut specificity = specificity(SelectorIter {
iter: sequence.iter().rev(),
next_combinator: None,
});
if parsed_pseudo_element {
specificity |= HAS_PSEUDO_BIT;
}
let complex = Selector(ArcSlice::new(sequence.into_vec().into_boxed_slice()), specificity);
Ok(complex)
}
impl<Impl: SelectorImpl> Selector<Impl> {
/// Parse a complex selector, without any pseudo-element.
/// Parse a selector, without any pseudo-element.
pub fn parse<P>(parser: &P, input: &mut CssParser) -> Result<Self, ()>
where P: Parser<Impl=Impl>
{
let (complex, has_pseudo_element) =
parse_complex_selector(parser, input)?;
if has_pseudo_element {
let selector = parse_complex_selector(parser, input)?;
if selector.has_pseudo_element() {
return Err(())
}
Ok(complex)
Ok(selector)
}
}