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Consider media attribute on link and style tags

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Don't add a stylesheet if the current device does not match the media
query specified in a link or style tag.
This commit is contained in:
Mikko Perttunen 2015-03-07 20:22:20 +02:00
parent 1e1c97adb3
commit e7a06cd241
4 changed files with 48 additions and 17 deletions
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16
components/script/dom/htmlstyleelement.rs
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@ -4,11 +4,11 @@
use dom::bindings::codegen::Bindings::HTMLStyleElementBinding;
use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
use dom::bindings::codegen::InheritTypes::{HTMLElementCast, HTMLStyleElementDerived, NodeCast};
use dom::bindings::js::{JSRef, Temporary};
use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast, HTMLStyleElementDerived, NodeCast};
use dom::bindings::js::{JSRef, Temporary, OptionalRootable};
use dom::document::Document;
use dom::eventtarget::{EventTarget, EventTargetTypeId};
use dom::element::ElementTypeId;
use dom::element::{Element, ElementTypeId};
use dom::htmlelement::{HTMLElement, HTMLElementTypeId};
use dom::node::{Node, NodeHelpers, NodeTypeId, window_from_node};
use dom::virtualmethods::VirtualMethods;
@ -16,6 +16,9 @@ use dom::window::WindowHelpers;
use layout_interface::{LayoutChan, Msg};
use util::str::DOMString;
use style::stylesheets::{Origin, Stylesheet};
use style::media_queries::parse_media_query_list;
use style::node::TElement;
use cssparser::Parser as CssParser;
#[dom_struct]
pub struct HTMLStyleElement {
@ -49,16 +52,21 @@ pub trait StyleElementHelpers {
impl<'a> StyleElementHelpers for JSRef<'a, HTMLStyleElement> {
fn parse_own_css(self) {
let node: JSRef<Node> = NodeCast::from_ref(self);
let element: JSRef<Element> = ElementCast::from_ref(self);
assert!(node.is_in_doc());
let win = window_from_node(node).root();
let win = win.r();
let url = win.get_url();
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 data = node.GetTextContent().expect("Element.textContent must be a string");
let sheet = Stylesheet::from_str(data.as_slice(), url, Origin::Author);
let LayoutChan(ref layout_chan) = win.layout_chan();
layout_chan.send(Msg::AddStylesheet(sheet)).unwrap();
layout_chan.send(Msg::AddStylesheet(sheet, media)).unwrap();
}
}