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style: Account for cousin sharing in the revalidation logic.

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Fixes bug 1361013.
This commit is contained in:
Emilio Cobos Álvarez 2017-05-01 11:32:07 +02:00
parent c71d97ae5e
commit e09ae428eb
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3 changed files with 43 additions and 57 deletions
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21
components/selectors/parser.rs
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@ -169,27 +169,6 @@ impl<Impl: SelectorImpl> SelectorInner<Impl> {
}
}
/// Creates a clone of this selector with everything to the left of
/// (and including) the rightmost ancestor combinator removed. So
/// the selector |span foo > bar + baz| will become |bar + baz|.
/// This is used for revalidation selectors in servo.
///
/// The bloom filter hashes are copied, even though they correspond to
/// parts of the selector that have been stripped out, because they are
/// still useful for fast-rejecting the reduced selectors.
pub fn slice_to_first_ancestor_combinator(&self) -> Self {
let maybe_pos = self.complex.iter_raw()
.position(|s| s.as_combinator()
.map_or(false, |c| c.is_ancestor()));
match maybe_pos {
None => self.clone(),
Some(index) => SelectorInner {
complex: self.complex.slice_to(index),
ancestor_hashes: self.ancestor_hashes.clone(),
},
}
}
/// Creates a SelectorInner from a Vec of Components. Used in tests.
pub fn from_vec(vec: Vec<Component<Impl>>) -> Self {
let complex = ComplexSelector::from_vec(vec);