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Extract out 'is the html body element' CSSOM concept.

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This commit is contained in:
Corey Farwell 2016-04-10 21:58:19 -04:00
parent 5adf36231e
commit 2c9b00ef6b
2 changed files with 12 additions and 6 deletions
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10
components/script/dom/htmlbodyelement.rs
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@ -47,6 +47,16 @@ impl HTMLBodyElement {
let element = HTMLBodyElement::new_inherited(localName, prefix, document);
Node::reflect_node(box element, document, HTMLBodyElementBinding::Wrap)
}
/// https://drafts.csswg.org/cssom-view/#the-html-body-element
pub fn is_the_html_body_element(&self) -> bool {
let self_node = self.upcast::<Node>();
let root_elem = self.upcast::<Element>().root_element();
let root_node = root_elem.upcast::<Node>();
root_node.is_parent_of(self_node) &&
self_node.preceding_siblings().all(|n| !n.is::<HTMLBodyElement>())
}
}
impl HTMLBodyElementMethods for HTMLBodyElement {