forked from mirrors/gecko-dev
c2d666ebcc
Takes care of #12436. --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #12436. <!-- Either: --> - [X] These changes do not require tests because the changes do not affect any functionality. <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> Source-Repo: https://github.com/servo/servo Source-Revision: f3f134707506c311ad89deb8f9177c05f59bd483
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::js::{JS, MutNullableHeap, Root};
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use dom::bindings::str::DOMString;
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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 string_cache::Atom;
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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: MutNullableHeap<JS<DocumentFragment>>,
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}
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impl HTMLTemplateElement {
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fn new_inherited(localName: Atom,
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prefix: Option<DOMString>,
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document: &Document) -> HTMLTemplateElement {
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HTMLTemplateElement {
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htmlelement:
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HTMLElement::new_inherited(localName, prefix, document),
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contents: MutNullableHeap::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(localName: Atom,
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prefix: Option<DOMString>,
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document: &Document) -> Root<HTMLTemplateElement> {
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Node::reflect_node(box HTMLTemplateElement::new_inherited(localName, 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) -> Root<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 = Root::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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