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Stop returning rule nodes from match_element and overhaul style calculation logic.

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This commit is contained in:
Bobby Holley 2017-02-08 15:38:35 -08:00
parent 5873de3fb6
commit 0e3aeac922
4 changed files with 242 additions and 297 deletions
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29
components/style/data.rs
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@ -76,13 +76,6 @@ impl fmt::Debug for ComputedStyle {
type PseudoStylesInner = HashMap<PseudoElement, ComputedStyle,
BuildHasherDefault<::fnv::FnvHasher>>;
/// The rule nodes for each of the pseudo-elements of an element.
///
/// TODO(emilio): Probably shouldn't be a `HashMap` by default, but a smaller
/// array.
pub type PseudoRuleNodes = HashMap<PseudoElement, StrongRuleNode,
BuildHasherDefault<::fnv::FnvHasher>>;
/// A set of styles for a given element's pseudo-elements.
///
/// This is a map from pseudo-element to `ComputedStyle`.
@ -97,19 +90,6 @@ impl PseudoStyles {
pub fn empty() -> Self {
PseudoStyles(HashMap::with_hasher(Default::default()))
}
/// Gets the rules that the different pseudo-elements matched.
///
/// FIXME(emilio): We could in theory avoid creating these when we have
/// support for just re-cascading an element. Then the input to
/// `cascade_node` could be `MatchResults` or just `UseExistingStyle`.
pub fn get_rules(&self) -> PseudoRuleNodes {
let mut rules = HashMap::with_hasher(Default::default());
for (pseudo, style) in &self.0 {
rules.insert(pseudo.clone(), style.rules.clone());
}
rules
}
}
impl Deref for PseudoStyles {
@ -467,7 +447,14 @@ impl ElementData {
/// Gets a mutable reference to the element styles. Panic if the element has
/// never been styled.
pub fn styles_mut(&mut self) -> &mut ElementStyles {
self.styles.as_mut().expect("Caling styles_mut() on unstyled ElementData")
self.styles.as_mut().expect("Calling styles_mut() on unstyled ElementData")
}
/// Borrows both styles and restyle mutably at the same time.
pub fn styles_and_restyle_mut(&mut self) -> (&mut ElementStyles,
Option<&mut RestyleData>) {
(self.styles.as_mut().unwrap(),
self.restyle.as_mut().map(|r| &mut **r))
}
/// Sets the computed element styles.