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Use a rule hash for revalidation selectors.

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MozReview-Commit-ID: 1mTZcfMxaw8
This commit is contained in:
Bobby Holley 2017-05-03 16:23:46 -07:00
parent a6fe7bea5e
commit 1fb9108daf
1 changed files with 18 additions and 15 deletions
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33
components/style/stylist.rs
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@ -117,7 +117,7 @@ pub struct Stylist {
/// on state that is not otherwise visible to the cache, like attributes or
/// tree-structural state like child index and pseudos).
#[cfg_attr(feature = "servo", ignore_heap_size_of = "Arc")]
selectors_for_cache_revalidation: Vec<SelectorInner<SelectorImpl>>,
selectors_for_cache_revalidation: SelectorMap<SelectorInner<SelectorImpl>>,
/// The total number of selectors.
num_selectors: usize,
@ -177,7 +177,7 @@ impl Stylist {
rules_source_order: 0,
rule_tree: RuleTree::new(),
dependencies: DependencySet::new(),
selectors_for_cache_revalidation: vec![],
selectors_for_cache_revalidation: SelectorMap::new(),
num_selectors: 0,
num_declarations: 0,
num_rebuilds: 0,
@ -260,7 +260,7 @@ impl Stylist {
self.rules_source_order = 0;
self.dependencies.clear();
self.animations.clear();
self.selectors_for_cache_revalidation.clear();
self.selectors_for_cache_revalidation = SelectorMap::new();
self.num_selectors = 0;
self.num_declarations = 0;
@ -376,7 +376,7 @@ impl Stylist {
#[inline]
fn note_for_revalidation(&mut self, selector: &Selector<SelectorImpl>) {
if needs_revalidation(selector) {
self.selectors_for_cache_revalidation.push(selector.inner.clone());
self.selectors_for_cache_revalidation.insert(selector.inner.clone());
}
}
@ -847,17 +847,20 @@ impl Stylist {
use selectors::matching::StyleRelations;
use selectors::matching::matches_selector;
let len = self.selectors_for_cache_revalidation.len();
let mut results = BitVec::from_elem(len, false);
for (i, ref selector) in self.selectors_for_cache_revalidation
.iter().enumerate() {
results.set(i, matches_selector(selector,
element,
Some(bloom),
&mut StyleRelations::empty(),
flags_setter));
}
// Note that, by the time we're revalidating, we're guaranteed that the
// candidate and the entry have the same id, classes, and local name.
// This means we're guaranteed to get the same rulehash buckets for all
// the lookups, which means that the bitvecs are comparable. We verify
// this in the caller by asserting that the bitvecs are same-length.
let mut results = BitVec::new();
self.selectors_for_cache_revalidation.lookup(*element, &mut |selector| {
results.push(matches_selector(selector,
element,
Some(bloom),
&mut StyleRelations::empty(),
flags_setter));
true
});
results
}