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Remove unnecessary rooting from CSSStyleDeclaration

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This commit will replace calls to `self.owner.root()` with `self.owner`
to avoid unnecessary rooting of JS elements objects.

Ref.- Issue: #8126
This commit is contained in:
Roman Klauke 2015-10-21 21:13:23 +02:00
parent 2de5407cda
commit fe2401c566
1 changed files with 10 additions and 20 deletions
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30
components/script/dom/cssstyledeclaration.rs
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@ -74,23 +74,21 @@ impl CSSStyleDeclaration {
}
fn get_computed_style(&self, property: &Atom) -> Option<DOMString> {
let owner = self.owner.root();
let node = owner.upcast::<Node>();
let node = self.owner.upcast::<Node>();
if !node.is_in_doc() {
// TODO: Node should be matched against the style rules of this window.
// Firefox is currently the only browser to implement this.
return None;
}
let addr = node.to_trusted_node_address();
window_from_node(owner.r()).resolved_style_query(addr, self.pseudo.clone(), property)
window_from_node(&*self.owner).resolved_style_query(addr, self.pseudo.clone(), property)
}
}
impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
// https://dev.w3.org/csswg/cssom/#dom-cssstyledeclaration-length
fn Length(&self) -> u32 {
let owner = self.owner.root();
let elem = owner.upcast::<Element>();
let elem = self.owner.upcast::<Element>();
let len = match *elem.style_attribute().borrow() {
Some(ref declarations) => declarations.normal.len() + declarations.important.len(),
None => 0
@ -101,8 +99,7 @@ impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
// https://dev.w3.org/csswg/cssom/#dom-cssstyledeclaration-item
fn Item(&self, index: u32) -> DOMString {
let index = index as usize;
let owner = self.owner.root();
let elem = owner.upcast::<Element>();
let elem = self.owner.upcast::<Element>();
let style_attribute = elem.style_attribute().borrow();
let result = style_attribute.as_ref().and_then(|declarations| {
if index > declarations.normal.len() {
@ -121,7 +118,7 @@ impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
// https://dev.w3.org/csswg/cssom/#dom-cssstyledeclaration-getpropertyvalue
fn GetPropertyValue(&self, mut property: DOMString) -> DOMString {
let owner = self.owner.root();
let owner = &self.owner;
// Step 1
property.make_ascii_lowercase();
@ -155,7 +152,6 @@ impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
}
// Step 3 & 4
// FIXME: redundant let binding https://github.com/rust-lang/rust/issues/22252
let result = match owner.get_inline_style_declaration(&property) {
Some(declaration) => declaration.value(),
None => "".to_owned(),
@ -181,9 +177,7 @@ impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
}
// Step 3
} else {
// FIXME: extra let binding https://github.com/rust-lang/rust/issues/22323
let owner = self.owner.root();
if owner.get_important_inline_style_declaration(&property).is_some() {
if self.owner.get_important_inline_style_declaration(&property).is_some() {
return "important".to_owned();
}
}
@ -221,8 +215,7 @@ impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
};
// Step 6
let owner = self.owner.root();
let window = window_from_node(owner.r());
let window = window_from_node(&*self.owner);
let declarations = parse_one_declaration(&property, &value, &window.r().get_url());
// Step 7
@ -232,8 +225,7 @@ impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
return Ok(());
};
let owner = self.owner.root();
let element = owner.upcast::<Element>();
let element = self.owner.upcast::<Element>();
// Step 8
for decl in declarations {
@ -266,8 +258,7 @@ impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
_ => return Ok(()),
};
let owner = self.owner.root();
let element = owner.upcast::<Element>();
let element = self.owner.upcast::<Element>();
// Step 5 & 6
match longhands_from_shorthand(&property) {
@ -299,8 +290,7 @@ impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
// Step 3
let value = self.GetPropertyValue(property.clone());
let owner = self.owner.root();
let elem = owner.upcast::<Element>();
let elem = self.owner.upcast::<Element>();
match longhands_from_shorthand(&property) {
// Step 4