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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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24
components/layout/layout_task.rs
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@ -73,7 +73,7 @@ use style::selector_matching::Stylist;
use style::computed_values::{filter, mix_blend_mode};
use style::stylesheets::{Origin, Stylesheet, iter_font_face_rules};
use style::node::TNode;
use style::media_queries::{MediaType, Device};
use style::media_queries::{MediaType, MediaQueryList, Device};
use std::sync::{Arc, Mutex, MutexGuard};
use url::Url;
@ -405,8 +405,8 @@ impl LayoutTask {
LayoutTaskData>>)
-> bool {
match request {
Msg::AddStylesheet(sheet) => self.handle_add_stylesheet(sheet, possibly_locked_rw_data),
Msg::LoadStylesheet(url) => self.handle_load_stylesheet(url, possibly_locked_rw_data),
Msg::AddStylesheet(sheet, mq) => self.handle_add_stylesheet(sheet, mq, possibly_locked_rw_data),
Msg::LoadStylesheet(url, mq) => self.handle_load_stylesheet(url, mq, possibly_locked_rw_data),
Msg::SetQuirksMode => self.handle_set_quirks_mode(possibly_locked_rw_data),
Msg::GetRPC(response_chan) => {
response_chan.send(box LayoutRPCImpl(self.rw_data.clone()) as
@ -487,11 +487,13 @@ impl LayoutTask {
fn handle_load_stylesheet<'a>(&'a self,
url: Url,
mq: MediaQueryList,
possibly_locked_rw_data:
&mut Option<MutexGuard<'a, LayoutTaskData>>) {
// TODO: Get the actual value. http://dev.w3.org/csswg/css-syntax/#environment-encoding
let environment_encoding = UTF_8 as EncodingRef;
// TODO we don't really even need to load this if mq does not match
let (metadata, iter) = load_bytes_iter(&self.resource_task, url);
let protocol_encoding_label = metadata.charset.as_ref().map(|s| s.as_slice());
let final_url = metadata.final_url;
@ -501,20 +503,26 @@ impl LayoutTask {
protocol_encoding_label,
Some(environment_encoding),
Origin::Author);
self.handle_add_stylesheet(sheet, possibly_locked_rw_data);
self.handle_add_stylesheet(sheet, mq, possibly_locked_rw_data);
}
fn handle_add_stylesheet<'a>(&'a self,
sheet: Stylesheet,
mq: MediaQueryList,
possibly_locked_rw_data:
&mut Option<MutexGuard<'a, LayoutTaskData>>) {
// Find all font-face rules and notify the font cache of them.
// GWTODO: Need to handle unloading web fonts (when we handle unloading stylesheets!)
let mut rw_data = self.lock_rw_data(possibly_locked_rw_data);
iter_font_face_rules(&sheet, &rw_data.stylist.device, &|&:family, src| {
self.font_cache_task.add_web_font(family.to_owned(), (*src).clone());
});
rw_data.stylist.add_stylesheet(sheet);
if mq.evaluate(&rw_data.stylist.device) {
iter_font_face_rules(&sheet, &rw_data.stylist.device, &|&:family, src| {
self.font_cache_task.add_web_font(family.to_owned(), (*src).clone());
});
rw_data.stylist.add_stylesheet(sheet);
}
LayoutTask::return_rw_data(possibly_locked_rw_data, rw_data);
}