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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;
use dom::attr::AttrHelpers;
use dom::bindings::codegen::Bindings::HTMLLinkElementBinding;
use dom::bindings::codegen::InheritTypes::HTMLLinkElementDerived;
use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast};
use dom::bindings::js::{JSRef, Temporary, OptionalRootable};
use dom::bindings::utils::{Reflectable, Reflector};
use dom::document::Document;
use dom::element::{AttributeHandlers, Element, HTMLLinkElementTypeId};
use dom::eventtarget::{EventTarget, NodeTargetTypeId};
use dom::htmlelement::HTMLElement;
use dom::node::{Node, NodeHelpers, ElementNodeTypeId, window_from_node};
use dom::virtualmethods::VirtualMethods;
use layout_interface::{LayoutChan, LoadStylesheetMsg};
use servo_util::str::{DOMString, HTML_SPACE_CHARACTERS};
use std::ascii::AsciiExt;
use url::UrlParser;
use string_cache::Atom;
#[dom_struct]
pub struct HTMLLinkElement {
htmlelement: HTMLElement,
}
impl HTMLLinkElementDerived for EventTarget {
fn is_htmllinkelement(&self) -> bool {
*self.type_id() == NodeTargetTypeId(ElementNodeTypeId(HTMLLinkElementTypeId))
}
}
impl HTMLLinkElement {
fn new_inherited(localName: DOMString, prefix: Option<DOMString>, document: JSRef<Document>) -> HTMLLinkElement {
HTMLLinkElement {
htmlelement: HTMLElement::new_inherited(HTMLLinkElementTypeId, localName, prefix, document)
}
}
#[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>, name: &Atom) -> Option<String> {
let elem = element.get_attribute(ns!(""), name).root();
elem.map(|e| e.value().as_slice().to_string())
}
fn is_stylesheet(value: &Option<String>) -> bool {
match *value {
Some(ref value) => {
value.as_slice().split(HTML_SPACE_CHARACTERS.as_slice())
.any(|s| s.as_slice().eq_ignore_ascii_case("stylesheet"))
},
None => false,
}
}
impl<'a> VirtualMethods for JSRef<'a, HTMLLinkElement> {
fn super_type<'a>(&'a self) -> Option<&'a VirtualMethods> {
let htmlelement: &JSRef<HTMLElement> = HTMLElementCast::from_borrowed_ref(self);
Some(htmlelement as &VirtualMethods)
}
fn after_set_attr(&self, attr: JSRef<Attr>) {
match self.super_type() {
Some(ref s) => s.after_set_attr(attr),
_ => ()
}
let element: JSRef<Element> = ElementCast::from_ref(*self);
let rel = get_attr(element, &atom!("rel"));
match (rel, attr.local_name()) {
(ref rel, &atom!("href")) => {
if is_stylesheet(rel) {
self.handle_stylesheet_url(attr.value().as_slice());
}
}
(_, _) => ()
}
}
fn bind_to_tree(&self, tree_in_doc: bool) {
match self.super_type() {
Some(ref s) => 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.as_slice());
}
_ => {}
}
}
}
}
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();
match UrlParser::new().base_url(&window.page().get_url()).parse(href) {
Ok(url) => {
let LayoutChan(ref layout_chan) = window.page().layout_chan;
layout_chan.send(LoadStylesheetMsg(url));
}
Err(e) => debug!("Parsing url {:s} failed: {}", href, e)
}
}
}
impl Reflectable for HTMLLinkElement {
fn reflector<'a>(&'a self) -> &'a Reflector {
self.htmlelement.reflector()
}
}
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