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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use dom::bindings::codegen::Bindings::DocumentBinding::DocumentMethods;
use dom::bindings::codegen::Bindings::HTMLHeadElementBinding;
use dom::bindings::inheritance::Castable;
use dom::bindings::root::{DomRoot, RootedReference};
use dom::document::{Document, determine_policy_for_token};
use dom::element::Element;
use dom::htmlelement::HTMLElement;
use dom::htmlmetaelement::HTMLMetaElement;
use dom::node::{Node, document_from_node};
use dom::userscripts::load_script;
use dom::virtualmethods::VirtualMethods;
use dom_struct::dom_struct;
use html5ever::{LocalName, Prefix};
#[dom_struct]
pub struct HTMLHeadElement {
htmlelement: HTMLElement
}
impl HTMLHeadElement {
fn new_inherited(local_name: LocalName,
prefix: Option<Prefix>,
document: &Document) -> HTMLHeadElement {
HTMLHeadElement {
htmlelement: HTMLElement::new_inherited(local_name, prefix, document)
}
}
#[allow(unrooted_must_root)]
pub fn new(local_name: LocalName,
prefix: Option<Prefix>,
document: &Document) -> DomRoot<HTMLHeadElement> {
Node::reflect_node(Box::new(HTMLHeadElement::new_inherited(local_name, prefix, document)),
document,
HTMLHeadElementBinding::Wrap)
}
/// <https://html.spec.whatwg.org/multipage/#meta-referrer>
pub fn set_document_referrer(&self) {
let doc = document_from_node(self);
if doc.GetHead().r() != Some(self) {
return;
}
let node = self.upcast::<Node>();
let candidates = node.traverse_preorder()
.filter_map(DomRoot::downcast::<Element>)
.filter(|elem| elem.is::<HTMLMetaElement>())
.filter(|elem| elem.get_string_attribute(&local_name!("name")) == "referrer")
.filter(|elem| elem.get_attribute(&ns!(), &local_name!("content")).is_some());
for meta in candidates {
if let Some(content) = meta.get_attribute(&ns!(), &local_name!("content")).r() {
let content = content.value();
let content_val = content.trim();
if !content_val.is_empty() {
doc.set_referrer_policy(determine_policy_for_token(content_val));
return;
}
}
}
}
}
impl VirtualMethods for HTMLHeadElement {
fn super_type(&self) -> Option<&VirtualMethods> {
Some(self.upcast::<HTMLElement>() as &VirtualMethods)
}
fn bind_to_tree(&self, tree_in_doc: bool) {
if let Some(ref s) = self.super_type() {
s.bind_to_tree(tree_in_doc);
}
load_script(self);
}
}
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