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implement "has event listener", plug into (before)unload

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This commit is contained in:
Gregory Terzian 2018-04-27 13:35:53 +08:00
parent 427eaed535
commit 29d1cf6270
9 changed files with 66 additions and 56 deletions
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19
components/script/dom/document.rs
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@ -1646,15 +1646,15 @@ impl Document {
EventCancelable::Cancelable);
let event = beforeunload_event.upcast::<Event>();
event.set_trusted(true);
self.window.upcast::<EventTarget>().dispatch_event_with_target(
let event_target = self.window.upcast::<EventTarget>();
let has_listeners = event.has_listeners_for(&event_target, &atom!("beforeunload"));
event_target.dispatch_event_with_target(
document.root().upcast(),
&event,
);
// TODO: Step 6, decrease the event loop's termination nesting level by 1.
// Step 7
if event.get_cancel_state() != EventDefault::Allowed {
self.salvageable.set(false);
}
self.salvageable.set(!has_listeners);
let mut can_unload = true;
// TODO: Step 8 send a message to embedder to prompt user.
// Step 9
@ -1698,7 +1698,6 @@ impl Document {
);
// TODO Step 6, document visibility steps.
}
let mut event_handled = false;
// Step 7
if !self.fired_unload.get() {
let event = Event::new(
@ -1708,16 +1707,18 @@ impl Document {
EventCancelable::Cancelable,
);
event.set_trusted(true);
let _ = self.window.upcast::<EventTarget>().dispatch_event_with_target(
let event_target = self.window.upcast::<EventTarget>();
let has_listeners = event.has_listeners_for(&event_target, &atom!("unload"));
let _ = event_target.dispatch_event_with_target(
document.root().upcast(),
&event,
);
self.fired_unload.set(true);
event_handled = event.get_cancel_state() != EventDefault::Allowed;
// Step 9
self.salvageable.set(!has_listeners);
}
// TODO: Step 8, decrease the event loop's termination nesting level by 1.
// Step 9
self.salvageable.set(!event_handled);
// Step 13
if !recursive_flag {
for iframe in self.iter_iframes() {