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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::cell::DOMRefCell;
use dom::bindings::codegen::Bindings::HTMLMetaElementBinding;
use dom::bindings::codegen::Bindings::HTMLMetaElementBinding::HTMLMetaElementMethods;
use dom::bindings::inheritance::Castable;
use dom::bindings::js::{Root, RootedReference};
use dom::document::Document;
use dom::element::Element;
use dom::htmlelement::HTMLElement;
use dom::node::{Node, document_from_node};
use dom::virtualmethods::VirtualMethods;
use std::ascii::AsciiExt;
use std::sync::Arc;
use string_cache::Atom;
use style::stylesheets::{CSSRule, Origin, Stylesheet};
use style::viewport::ViewportRule;
use util::str::{DOMString, HTML_SPACE_CHARACTERS};
#[dom_struct]
pub struct HTMLMetaElement {
htmlelement: HTMLElement,
stylesheet: DOMRefCell<Option<Arc<Stylesheet>>>,
}
impl HTMLMetaElement {
fn new_inherited(localName: Atom,
prefix: Option<DOMString>,
document: &Document) -> HTMLMetaElement {
HTMLMetaElement {
htmlelement: HTMLElement::new_inherited(localName, prefix, document),
stylesheet: DOMRefCell::new(None),
}
}
#[allow(unrooted_must_root)]
pub fn new(localName: Atom,
prefix: Option<DOMString>,
document: &Document) -> Root<HTMLMetaElement> {
let element = HTMLMetaElement::new_inherited(localName, prefix, document);
Node::reflect_node(box element, document, HTMLMetaElementBinding::Wrap)
}
pub fn get_stylesheet(&self) -> Option<Arc<Stylesheet>> {
self.stylesheet.borrow().clone()
}
fn process_attributes(&self) {
let element = self.upcast::<Element>();
if let Some(name) = element.get_attribute(&ns!(), &atom!("name")).r() {
let name = name.value().to_ascii_lowercase();
let name = name.trim_matches(HTML_SPACE_CHARACTERS);
match name {
"viewport" => self.apply_viewport(),
_ => {}
}
}
}
fn apply_viewport(&self) {
if !::util::prefs::get_pref("layout.viewport.enabled").as_boolean().unwrap_or(false) {
return;
}
let element = self.upcast::<Element>();
if let Some(content) = element.get_attribute(&ns!(), &atom!("content")).r() {
let content = content.value();
if !content.is_empty() {
if let Some(translated_rule) = ViewportRule::from_meta(&**content) {
*self.stylesheet.borrow_mut() = Some(Arc::new(Stylesheet {
rules: vec![CSSRule::Viewport(translated_rule)],
origin: Origin::Author,
media: None,
}));
let doc = document_from_node(self);
doc.invalidate_stylesheets();
}
}
}
}
}
impl HTMLMetaElementMethods for HTMLMetaElement {
// https://html.spec.whatwg.org/multipage/#dom-meta-name
make_getter!(Name, "name");
// https://html.spec.whatwg.org/multipage/#dom-meta-name
make_setter!(SetName, "name");
// https://html.spec.whatwg.org/multipage/#dom-meta-content
make_getter!(Content, "content");
// https://html.spec.whatwg.org/multipage/#dom-meta-content
make_setter!(SetContent, "content");
}
impl VirtualMethods for HTMLMetaElement {
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);
}
if tree_in_doc {
self.process_attributes();
}
}
}
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