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Separate rule node computation from cascade.

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This commit is contained in:
Bobby Holley 2016-11-10 18:58:27 -08:00
parent 75d35241db
commit 5741b8150a
2 changed files with 86 additions and 92 deletions
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37
components/style/traversal.rs
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@ -8,7 +8,7 @@ use atomic_refcell::{AtomicRefCell, AtomicRefMut};
use context::{LocalStyleContext, SharedStyleContext, StyleContext};
use data::ElementData;
use dom::{OpaqueNode, StylingMode, TElement, TNode, UnsafeNode};
use matching::{ApplicableDeclarations, MatchMethods, StyleSharingResult};
use matching::{MatchMethods, StyleSharingResult};
use selectors::bloom::BloomFilter;
use selectors::matching::StyleRelations;
use std::cell::RefCell;
@ -285,16 +285,14 @@ fn ensure_element_styled_internal<'a, E, C>(element: E,
// Note that we could add the bloom filter's complexity here, but that's
// probably not necessary since we're likely to be matching only a few
// nodes, at best.
let mut applicable_declarations = ApplicableDeclarations::new();
let data = prepare_for_styling(element, element.get_data().unwrap());
let stylist = &context.shared_context().stylist;
element.match_element(&**stylist,
None,
&mut applicable_declarations);
let match_results = element.match_element(context, None);
unsafe {
element.cascade_node(context, data, parent, applicable_declarations);
let shareable = match_results.primary_is_shareable();
element.cascade_node(context, data, parent,
match_results.primary,
match_results.per_pseudo,
shareable);
}
}
@ -330,34 +328,29 @@ pub fn recalc_style_at<'a, E, C, D>(context: &'a C,
// Otherwise, match and cascade selectors.
match sharing_result {
StyleSharingResult::CannotShare => {
let mut applicable_declarations = ApplicableDeclarations::new();
let relations;
let match_results;
let shareable_element = {
if opts::get().style_sharing_stats {
STYLE_SHARING_CACHE_MISSES.fetch_add(1, Ordering::Relaxed);
}
// Perform the CSS selector matching.
let stylist = &context.shared_context().stylist;
relations = element.match_element(&**stylist,
Some(&*bf),
&mut applicable_declarations);
debug!("Result of selector matching: {:?}", relations);
if relations_are_shareable(&relations) {
match_results = element.match_element(context, Some(&*bf));
if match_results.primary_is_shareable() {
Some(element)
} else {
None
}
};
let relations = match_results.relations;
// Perform the CSS cascade.
unsafe {
let shareable = match_results.primary_is_shareable();
element.cascade_node(context, data, element.parent_element(),
applicable_declarations);
match_results.primary,
match_results.per_pseudo,
shareable);
}
// Add ourselves to the LRU cache.