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Add slots in PerPseudoElementMap for tree pseudos.

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This commit is contained in:
Xidorn Quan 2017-10-20 14:08:35 +11:00
parent b743d68ccd
commit 4ce3dc7729
6 changed files with 203 additions and 185 deletions
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30
components/style/selector_parser.rs
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@ -102,16 +102,16 @@ pub enum PseudoElementCascadeType {
Precomputed,
}
/// A per-functional-pseudo map, from a given pseudo to a `T`.
/// A per-pseudo map, from a given pseudo to a `T`.
#[derive(MallocSizeOf)]
pub struct PerPseudoElementMap<T> {
entries: [Option<T>; SIMPLE_PSEUDO_COUNT],
entries: [Option<T>; PSEUDO_COUNT],
}
impl<T> Default for PerPseudoElementMap<T> {
fn default() -> Self {
Self {
entries: PseudoElement::simple_pseudo_none_array(),
entries: PseudoElement::pseudo_none_array(),
}
}
}
@ -137,11 +137,7 @@ where
impl<T> PerPseudoElementMap<T> {
/// Get an entry in the map.
pub fn get(&self, pseudo: &PseudoElement) -> Option<&T> {
let index = match pseudo.simple_index() {
Some(i) => i,
None => return None,
};
self.entries[index].as_ref()
self.entries[pseudo.index()].as_ref()
}
/// Clear this enumerated array.
@ -161,13 +157,8 @@ impl<T> PerPseudoElementMap<T> {
/// Set an entry value.
///
/// Returns an error if the element is not a simple pseudo.
pub fn set(&mut self, pseudo: &PseudoElement, value: T) -> Result<(), ()> {
let index = match pseudo.simple_index() {
Some(i) => i,
None => return Err(()),
};
self.entries[index] = Some(value);
Ok(())
pub fn set(&mut self, pseudo: &PseudoElement, value: T) {
self.entries[pseudo.index()] = Some(value);
}
/// Get an entry for `pseudo`, or create it with calling `f`.
@ -175,18 +166,15 @@ impl<T> PerPseudoElementMap<T> {
&mut self,
pseudo: &PseudoElement,
f: F,
) -> Result<&mut T, ()>
) -> &mut T
where
F: FnOnce() -> T,
{
let index = match pseudo.simple_index() {
Some(i) => i,
None => return Err(()),
};
let index = pseudo.index();
if self.entries[index].is_none() {
self.entries[index] = Some(f());
}
Ok(self.entries[index].as_mut().unwrap())
self.entries[index].as_mut().unwrap()
}
/// Get an iterator for the entries.