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Optimize lookupPrefix.

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This commit is contained in:
Ms2ger 2015-06-10 10:33:40 +02:00
parent 44a4b7886d
commit 749598f5a0
2 changed files with 12 additions and 7 deletions
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14
components/script/dom/element.rs
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@ -561,7 +561,7 @@ pub trait ElementHelpers<'a> {
fn get_important_inline_style_declaration(self, property: &Atom) -> Option<PropertyDeclaration>;
fn serialize(self, traversal_scope: TraversalScope) -> Fallible<DOMString>;
fn get_root_element(self) -> Temporary<Element>;
fn lookup_prefix(self, namespace: Option<DOMString>) -> Option<DOMString>;
fn lookup_prefix(self, namespace: Namespace) -> Option<DOMString>;
}
impl<'a> ElementHelpers<'a> for JSRef<'a, Element> {
@ -722,21 +722,23 @@ impl<'a> ElementHelpers<'a> for JSRef<'a, Element> {
}
// https://dom.spec.whatwg.org/#locate-a-namespace-prefix
fn lookup_prefix(self, namespace: Option<DOMString>) -> Option<DOMString> {
fn lookup_prefix(self, namespace: Namespace) -> Option<DOMString> {
for node in NodeCast::from_ref(self).inclusive_ancestors() {
match ElementCast::to_ref(node.root().r()) {
Some(element) => {
// Step 1.
if element.GetNamespaceURI() == namespace && element.GetPrefix().is_some() {
return element.GetPrefix();
if *element.namespace() == namespace {
if let Some(prefix) = element.GetPrefix() {
return Some(prefix);
}
}
// Step 2.
let attrs = element.Attributes().root();
for i in 0..attrs.r().Length() {
let attr = attrs.r().Item(i).unwrap().root();
if attr.r().GetPrefix() == Some("xmlns".to_owned()) &&
Some(attr.r().Value()) == namespace {
if *attr.r().prefix() == Some(atom!("xmlns")) &&
**attr.r().value() == *namespace.0 {
return Some(attr.r().LocalName());
}
}

5
components/script/dom/node.rs
View file

@ -52,6 +52,7 @@ use devtools_traits::NodeInfo;
use parse::html::parse_html_fragment;
use script_traits::UntrustedNodeAddress;
use util::geometry::Au;
use util::namespace;
use util::str::{DOMString, null_str_as_empty};
use selectors::parser::{Selector, AttrSelector, NamespaceConstraint};
use selectors::parser::parse_author_origin_selector_list_from_str;
@ -2470,8 +2471,10 @@ impl<'a> NodeMethods for JSRef<'a, Node> {
// https://dom.spec.whatwg.org/#dom-node-lookupprefix
fn LookupPrefix(self, namespace: Option<DOMString>) -> Option<DOMString> {
let namespace = namespace::from_domstring(namespace);
// Step 1.
if null_str_as_empty(&namespace).is_empty() {
if namespace == ns!("") {
return None;
}