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Keep track of the number of important and normal declarations in a block

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… instead of the presence (`bool` flags) of each.

This allows removing `recalc_any` which iterated over the `Vec`.
This commit is contained in:
Simon Sapin 2016-08-21 03:20:29 +02:00
parent 5e4bdac2bd
commit f9150af936
5 changed files with 107 additions and 70 deletions
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61
components/script/dom/element.rs
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@ -762,12 +762,21 @@ impl Element {
fn remove(element: &Element, property: &str) {
let mut inline_declarations = element.style_attribute.borrow_mut();
if let &mut Some(ref mut declarations) = &mut *inline_declarations {
let index = declarations.declarations
.iter()
.position(|&(ref decl, _)| decl.matches(property));
let mut importance = None;
let index = declarations.declarations.iter().position(|&(ref decl, i)| {
let matching = decl.matches(property);
if matching {
importance = Some(i)
}
matching
});
if let Some(index) = index {
Arc::make_mut(&mut declarations.declarations).remove(index);
declarations.recalc_any();
if importance.unwrap().important() {
declarations.important_count -= 1;
} else {
declarations.normal_count -= 1;
}
}
}
}
@ -791,21 +800,42 @@ impl Element {
'outer: for incoming_declaration in declarations {
for existing_declaration in &mut *existing_declarations {
if existing_declaration.0.name() == incoming_declaration.name() {
match (existing_declaration.1, importance) {
(Importance::Normal, Importance::Important) => {
declaration_block.normal_count -= 1;
declaration_block.important_count += 1;
}
(Importance::Important, Importance::Normal) => {
declaration_block.normal_count += 1;
declaration_block.important_count -= 1;
}
_ => {}
}
*existing_declaration = (incoming_declaration, importance);
continue 'outer;
}
}
existing_declarations.push((incoming_declaration, importance));
if importance.important() {
declaration_block.important_count += 1;
} else {
declaration_block.normal_count += 1;
}
}
}
declaration_block.recalc_any();
return;
}
let (normal_count, important_count) = if importance.important() {
(0, declarations.len() as u32)
} else {
(declarations.len() as u32, 0)
};
*inline_declarations = Some(PropertyDeclarationBlock {
declarations: Arc::new(declarations.into_iter().map(|d| (d, importance)).collect()),
any_important: importance.important(),
any_normal: !importance.important(),
normal_count: normal_count,
important_count: important_count,
});
}
@ -818,13 +848,24 @@ impl Element {
new_importance: Importance) {
{
let mut inline_declarations = self.style_attribute().borrow_mut();
if let &mut Some(ref mut declarations) = &mut *inline_declarations {
if let &mut Some(ref mut block) = &mut *inline_declarations {
// Usually, the reference counts of `from` and `to` will be 1 here. But transitions
// could make them greater than that.
let declarations = Arc::make_mut(&mut declarations.declarations);
let declarations = Arc::make_mut(&mut block.declarations);
for &mut (ref declaration, ref mut importance) in declarations {
if properties.iter().any(|p| declaration.name() == **p) {
*importance = new_importance
match (*importance, new_importance) {
(Importance::Normal, Importance::Important) => {
block.normal_count -= 1;
block.important_count += 1;
}
(Importance::Important, Importance::Normal) => {
block.normal_count += 1;
block.important_count -= 1;
}
_ => {}
}
*importance = new_importance;
}
}
}