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Implement restyle hints for state changes.

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This commit is contained in:
Bobby Holley 2015-10-20 21:58:50 -07:00
parent 41dfd07d16
commit 45fc7f2930
5 changed files with 315 additions and 28 deletions
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18
components/style/selector_matching.rs
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@ -6,11 +6,13 @@ use legacy::PresentationalHintSynthesis;
use media_queries::Device;
use node::TElementAttributes;
use properties::{PropertyDeclaration, PropertyDeclarationBlock};
use restyle_hints::{RestyleHint, StateDependencySet};
use selectors::Element;
use selectors::bloom::BloomFilter;
use selectors::matching::DeclarationBlock as GenericDeclarationBlock;
use selectors::matching::{Rule, SelectorMap};
use selectors::parser::PseudoElement;
use selectors::states::*;
use smallvec::VecLike;
use std::process;
use style_traits::viewport::ViewportConstraints;
@ -41,6 +43,9 @@ pub struct Stylist {
before_map: PerPseudoElementSelectorMap,
after_map: PerPseudoElementSelectorMap,
rules_source_order: usize,
// Selector state dependencies used to compute restyle hints.
state_deps: StateDependencySet,
}
impl Stylist {
@ -55,6 +60,7 @@ impl Stylist {
before_map: PerPseudoElementSelectorMap::new(),
after_map: PerPseudoElementSelectorMap::new(),
rules_source_order: 0,
state_deps: StateDependencySet::new(),
};
// FIXME: Add iso-8859-9.css when the document’s encoding is ISO-8859-8.
// FIXME: presentational-hints.css should be at author origin with zero specificity.
@ -102,6 +108,7 @@ impl Stylist {
self.before_map = PerPseudoElementSelectorMap::new();
self.after_map = PerPseudoElementSelectorMap::new();
self.rules_source_order = 0;
self.state_deps.clear();
for stylesheet in &self.stylesheets {
let (mut element_map, mut before_map, mut after_map) = match stylesheet.origin {
@ -151,6 +158,9 @@ impl Stylist {
append!(style_rule, normal);
append!(style_rule, important);
rules_source_order += 1;
for selector in &style_rule.selectors {
self.state_deps.note_selector(selector.compound_selectors.clone());
}
}
self.rules_source_order = rules_source_order;
}
@ -162,6 +172,14 @@ impl Stylist {
false
}
pub fn restyle_hint_for_state_change<E>(&self, element: &E,
current_state: ElementState,
state_change: ElementState)
-> RestyleHint
where E: Element + Clone {
self.state_deps.compute_hint(element, current_state, state_change)
}
pub fn set_device(&mut self, device: Device) {
let is_dirty = self.is_dirty || self.stylesheets.iter()
.flat_map(|stylesheet| stylesheet.rules().media())