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Calling matchMedia during a MQL change event will not panic

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This commit is contained in:
Prudhvi Rampey 2017-02-10 19:49:25 +05:30
parent 216a89f776
commit 0c21333777
3 changed files with 51 additions and 6 deletions
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18
components/script/dom/mediaquerylist.rs
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@ -138,17 +138,23 @@ impl WeakMediaQueryListVec {
/// Evaluate media query lists and report changes
/// https://drafts.csswg.org/cssom-view/#evaluate-media-queries-and-report-changes
pub fn evaluate_and_report_changes(&self) {
rooted_vec!(let mut mql_list);
self.cell.borrow_mut().update(|mql| {
let mql = mql.root().unwrap();
if let MediaQueryListMatchState::Changed(_) = mql.evaluate_changes() {
let event = MediaQueryListEvent::new(&mql.global(),
atom!("change"),
false, false,
mql.Media(),
mql.Matches());
event.upcast::<Event>().fire(mql.upcast::<EventTarget>());
// Recording list of changed Media Queries
mql_list.push(JS::from_ref(&*mql));
}
});
// Sending change events for all changed Media Queries
for mql in mql_list.iter() {
let event = MediaQueryListEvent::new(&mql.global(),
atom!("change"),
false, false,
mql.Media(),
mql.Matches());
event.upcast::<Event>().fire(mql.upcast::<EventTarget>());
}
}
}