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Extract out 'is the html body element' CSSOM concept.
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2 changed files with 12 additions and 6 deletions
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@ -47,6 +47,16 @@ impl HTMLBodyElement {
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let element = HTMLBodyElement::new_inherited(localName, prefix, document);
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Node::reflect_node(box element, document, HTMLBodyElementBinding::Wrap)
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}
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/// https://drafts.csswg.org/cssom-view/#the-html-body-element
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pub fn is_the_html_body_element(&self) -> bool {
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let self_node = self.upcast::<Node>();
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let root_elem = self.upcast::<Element>().root_element();
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let root_node = root_elem.upcast::<Node>();
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root_node.is_parent_of(self_node) &&
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self_node.preceding_siblings().all(|n| !n.is::<HTMLBodyElement>())
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}
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}
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impl HTMLBodyElementMethods for HTMLBodyElement {
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