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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::attr::{Attr, AttrValue};
use dom::attr::AttrHelpers;
use dom::bindings::codegen::Bindings::HTMLLinkElementBinding;
use dom::bindings::codegen::Bindings::HTMLLinkElementBinding::HTMLLinkElementMethods;
use dom::bindings::codegen::InheritTypes::HTMLLinkElementDerived;
use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast, NodeCast};
use dom::bindings::js::{MutNullableJS, JSRef, Temporary, OptionalRootable};
use dom::document::Document;
use dom::domtokenlist::DOMTokenList;
use dom::element::{AttributeHandlers, Element};
use dom::eventtarget::{EventTarget, EventTargetTypeId};
use dom::element::ElementTypeId;
use dom::htmlelement::{HTMLElement, HTMLElementTypeId};
use dom::node::{Node, NodeHelpers, NodeTypeId, window_from_node};
use dom::virtualmethods::VirtualMethods;
use dom::window::WindowHelpers;
use layout_interface::{LayoutChan, Msg};
use util::str::{DOMString, HTML_SPACE_CHARACTERS};
use style::media_queries::parse_media_query_list;
use style::node::TElement;
use cssparser::Parser as CssParser;
use std::ascii::AsciiExt;
use std::borrow::ToOwned;
use std::default::Default;
use url::UrlParser;
use string_cache::Atom;
#[dom_struct]
pub struct HTMLLinkElement {
htmlelement: HTMLElement,
rel_list: MutNullableJS<DOMTokenList>,
}
impl HTMLLinkElementDerived for EventTarget {
fn is_htmllinkelement(&self) -> bool {
*self.type_id() == EventTargetTypeId::Node(NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLLinkElement)))
}
}
impl HTMLLinkElement {
fn new_inherited(localName: DOMString, prefix: Option<DOMString>, document: JSRef<Document>) -> HTMLLinkElement {
HTMLLinkElement {
htmlelement: HTMLElement::new_inherited(HTMLElementTypeId::HTMLLinkElement, localName, prefix, document),
rel_list: Default::default(),
}
}
#[allow(unrooted_must_root)]
pub fn new(localName: DOMString, prefix: Option<DOMString>, document: JSRef<Document>) -> Temporary<HTMLLinkElement> {
let element = HTMLLinkElement::new_inherited(localName, prefix, document);
Node::reflect_node(box element, document, HTMLLinkElementBinding::Wrap)
}
}
fn get_attr(element: JSRef<Element>, local_name: &Atom) -> Option<String> {
let elem = element.get_attribute(&ns!(""), local_name).root();
elem.map(|e| {
// FIXME(https://github.com/rust-lang/rust/issues/23338)
let e = e.r();
let value = e.value();
(**value).to_owned()
})
}
fn is_stylesheet(value: &Option<String>) -> bool {
match *value {
Some(ref value) => {
value.split(HTML_SPACE_CHARACTERS)
.any(|s| s.eq_ignore_ascii_case("stylesheet"))
},
None => false,
}
}
impl<'a> VirtualMethods for JSRef<'a, HTMLLinkElement> {
fn super_type<'b>(&'b self) -> Option<&'b VirtualMethods> {
let htmlelement: &JSRef<HTMLElement> = HTMLElementCast::from_borrowed_ref(self);
Some(htmlelement as &VirtualMethods)
}
fn after_set_attr(&self, attr: JSRef<Attr>) {
if let Some(ref s) = self.super_type() {
s.after_set_attr(attr);
}
let node: JSRef<Node> = NodeCast::from_ref(*self);
if !node.is_in_doc() {
return;
}
let element: JSRef<Element> = ElementCast::from_ref(*self);
let rel = get_attr(element, &atom!("rel"));
match (rel, attr.local_name()) {
(ref rel, &atom!("href")) | (ref rel, &atom!("media")) => {
if is_stylesheet(rel) {
self.handle_stylesheet_url(&attr.value());
}
}
(_, _) => ()
}
}
fn parse_plain_attribute(&self, name: &Atom, value: DOMString) -> AttrValue {
match name {
&atom!("rel") => AttrValue::from_serialized_tokenlist(value),
_ => self.super_type().unwrap().parse_plain_attribute(name, value),
}
}
fn bind_to_tree(&self, tree_in_doc: bool) {
if let Some(ref s) = self.super_type() {
s.bind_to_tree(tree_in_doc);
}
if tree_in_doc {
let element: JSRef<Element> = ElementCast::from_ref(*self);
let rel = get_attr(element, &atom!("rel"));
let href = get_attr(element, &atom!("href"));
match (rel, href) {
(ref rel, Some(ref href)) if is_stylesheet(rel) => {
self.handle_stylesheet_url(href);
}
_ => {}
}
}
}
}
trait PrivateHTMLLinkElementHelpers {
fn handle_stylesheet_url(self, href: &str);
}
impl<'a> PrivateHTMLLinkElementHelpers for JSRef<'a, HTMLLinkElement> {
fn handle_stylesheet_url(self, href: &str) {
let window = window_from_node(self).root();
let window = window.r();
match UrlParser::new().base_url(&window.get_url()).parse(href) {
Ok(url) => {
let element: JSRef<Element> = ElementCast::from_ref(self);
let mq_str = element.get_attr(&ns!(""), &atom!("media")).unwrap_or("");
let mut css_parser = CssParser::new(&mq_str);
let media = parse_media_query_list(&mut css_parser);
let LayoutChan(ref layout_chan) = window.layout_chan();
layout_chan.send(Msg::LoadStylesheet(url, media)).unwrap();
}
Err(e) => debug!("Parsing url {} failed: {}", href, e)
}
}
}
impl<'a> HTMLLinkElementMethods for JSRef<'a, HTMLLinkElement> {
make_url_getter!(Href);
make_setter!(SetHref, "href");
make_getter!(Rel);
make_setter!(SetRel, "rel");
make_getter!(Media);
make_setter!(SetMedia, "media");
make_getter!(Hreflang);
make_setter!(SetHreflang, "hreflang");
make_getter!(Type);
make_setter!(SetType, "type");
fn RelList(self) -> Temporary<DOMTokenList> {
self.rel_list.or_init(|| {
DOMTokenList::new(ElementCast::from_ref(self), &atom!("rel"))
})
}
}
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