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aa15dc269f
http://www.robohornet.org gives a score of 101.36 on master, and 102.68 with this PR. The latter is slightly better, but probably within noise level. So it looks like this PR does not affect DOM performance. This is expected since `Box::new` is defined as: ```rust impl<T> Box<T> { #[inline(always)] pub fn new(x: T) -> Box<T> { box x } } ``` With inlining, it should compile to the same as box syntax.
90 lines
3.6 KiB
Rust
90 lines
3.6 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use dom::bindings::codegen::Bindings::DocumentBinding::DocumentMethods;
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use dom::bindings::codegen::Bindings::HTMLTemplateElementBinding;
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use dom::bindings::codegen::Bindings::HTMLTemplateElementBinding::HTMLTemplateElementMethods;
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use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
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use dom::bindings::inheritance::Castable;
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use dom::bindings::root::{DomRoot, MutNullableDom};
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use dom::document::Document;
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use dom::documentfragment::DocumentFragment;
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use dom::htmlelement::HTMLElement;
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use dom::node::{CloneChildrenFlag, Node, document_from_node};
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use dom::virtualmethods::VirtualMethods;
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use dom_struct::dom_struct;
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use html5ever::{LocalName, Prefix};
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#[dom_struct]
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pub struct HTMLTemplateElement {
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htmlelement: HTMLElement,
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/// https://html.spec.whatwg.org/multipage/#template-contents
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contents: MutNullableDom<DocumentFragment>,
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}
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impl HTMLTemplateElement {
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fn new_inherited(local_name: LocalName,
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prefix: Option<Prefix>,
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document: &Document) -> HTMLTemplateElement {
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HTMLTemplateElement {
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htmlelement:
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HTMLElement::new_inherited(local_name, prefix, document),
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contents: MutNullableDom::new(None),
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}
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}
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#[allow(unrooted_must_root)]
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pub fn new(local_name: LocalName,
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prefix: Option<Prefix>,
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document: &Document) -> DomRoot<HTMLTemplateElement> {
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Node::reflect_node(Box::new(HTMLTemplateElement::new_inherited(local_name, prefix, document)),
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document,
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HTMLTemplateElementBinding::Wrap)
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}
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}
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impl HTMLTemplateElementMethods for HTMLTemplateElement {
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/// https://html.spec.whatwg.org/multipage/#dom-template-content
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fn Content(&self) -> DomRoot<DocumentFragment> {
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self.contents.or_init(|| {
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let doc = document_from_node(self);
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doc.appropriate_template_contents_owner_document().CreateDocumentFragment()
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})
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}
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}
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impl VirtualMethods for HTMLTemplateElement {
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fn super_type(&self) -> Option<&VirtualMethods> {
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Some(self.upcast::<HTMLElement>() as &VirtualMethods)
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}
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/// https://html.spec.whatwg.org/multipage/#template-adopting-steps
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fn adopting_steps(&self, old_doc: &Document) {
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self.super_type().unwrap().adopting_steps(old_doc);
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// Step 1.
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let doc = document_from_node(self).appropriate_template_contents_owner_document();
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// Step 2.
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Node::adopt(self.Content().upcast(), &doc);
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}
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/// https://html.spec.whatwg.org/multipage/#the-template-element:concept-node-clone-ext
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fn cloning_steps(&self, copy: &Node, maybe_doc: Option<&Document>,
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clone_children: CloneChildrenFlag) {
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self.super_type().unwrap().cloning_steps(copy, maybe_doc, clone_children);
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if clone_children == CloneChildrenFlag::DoNotCloneChildren {
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// Step 1.
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return;
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}
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let copy = copy.downcast::<HTMLTemplateElement>().unwrap();
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// Steps 2-3.
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let copy_contents = DomRoot::upcast::<Node>(copy.Content());
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let copy_contents_doc = copy_contents.owner_doc();
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for child in self.Content().upcast::<Node>().children() {
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let copy_child = Node::clone(
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&child, Some(©_contents_doc), CloneChildrenFlag::CloneChildren);
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copy_contents.AppendChild(©_child).unwrap();
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}
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}
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}
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