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e7a06cd241
Don't add a stylesheet if the current device does not match the media query specified in a link or style tag.
100 lines
3.6 KiB
Rust
100 lines
3.6 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use dom::bindings::codegen::Bindings::HTMLStyleElementBinding;
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use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
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use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast, HTMLStyleElementDerived, NodeCast};
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use dom::bindings::js::{JSRef, Temporary, OptionalRootable};
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use dom::document::Document;
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use dom::eventtarget::{EventTarget, EventTargetTypeId};
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use dom::element::{Element, ElementTypeId};
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use dom::htmlelement::{HTMLElement, HTMLElementTypeId};
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use dom::node::{Node, NodeHelpers, NodeTypeId, window_from_node};
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use dom::virtualmethods::VirtualMethods;
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use dom::window::WindowHelpers;
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use layout_interface::{LayoutChan, Msg};
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use util::str::DOMString;
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use style::stylesheets::{Origin, Stylesheet};
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use style::media_queries::parse_media_query_list;
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use style::node::TElement;
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use cssparser::Parser as CssParser;
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#[dom_struct]
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pub struct HTMLStyleElement {
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htmlelement: HTMLElement,
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}
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impl HTMLStyleElementDerived for EventTarget {
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fn is_htmlstyleelement(&self) -> bool {
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*self.type_id() == EventTargetTypeId::Node(NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLStyleElement)))
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}
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}
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impl HTMLStyleElement {
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fn new_inherited(localName: DOMString, prefix: Option<DOMString>, document: JSRef<Document>) -> HTMLStyleElement {
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HTMLStyleElement {
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htmlelement: HTMLElement::new_inherited(HTMLElementTypeId::HTMLStyleElement, localName, prefix, document)
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}
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}
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#[allow(unrooted_must_root)]
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pub fn new(localName: DOMString, prefix: Option<DOMString>, document: JSRef<Document>) -> Temporary<HTMLStyleElement> {
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let element = HTMLStyleElement::new_inherited(localName, prefix, document);
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Node::reflect_node(box element, document, HTMLStyleElementBinding::Wrap)
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}
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}
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pub trait StyleElementHelpers {
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fn parse_own_css(self);
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}
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impl<'a> StyleElementHelpers for JSRef<'a, HTMLStyleElement> {
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fn parse_own_css(self) {
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let node: JSRef<Node> = NodeCast::from_ref(self);
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let element: JSRef<Element> = ElementCast::from_ref(self);
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assert!(node.is_in_doc());
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let win = window_from_node(node).root();
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let win = win.r();
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let url = win.get_url();
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let mq_str = element.get_attr(&ns!(""), &atom!("media")).unwrap_or("");
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let mut css_parser = CssParser::new(&mq_str);
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let media = parse_media_query_list(&mut css_parser);
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let data = node.GetTextContent().expect("Element.textContent must be a string");
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let sheet = Stylesheet::from_str(data.as_slice(), url, Origin::Author);
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let LayoutChan(ref layout_chan) = win.layout_chan();
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layout_chan.send(Msg::AddStylesheet(sheet, media)).unwrap();
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}
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}
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impl<'a> VirtualMethods for JSRef<'a, HTMLStyleElement> {
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fn super_type<'b>(&'b self) -> Option<&'b VirtualMethods> {
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let htmlelement: &JSRef<HTMLElement> = HTMLElementCast::from_borrowed_ref(self);
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Some(htmlelement as &VirtualMethods)
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}
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fn child_inserted(&self, child: JSRef<Node>) {
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if let Some(ref s) = self.super_type() {
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s.child_inserted(child);
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}
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let node: JSRef<Node> = NodeCast::from_ref(*self);
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if node.is_in_doc() {
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self.parse_own_css();
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}
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}
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fn bind_to_tree(&self, tree_in_doc: bool) {
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if let Some(ref s) = self.super_type() {
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s.bind_to_tree(tree_in_doc);
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}
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if tree_in_doc {
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self.parse_own_css();
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}
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}
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}
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