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Commit 9da0291b authored by Rakina Zata Amni's avatar Rakina Zata Amni Committed by Commit Bot
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Use adjusted relatedTarget on WindowEventContext 

In event capturing phase, when the event is dispatched on window, the
related target was not set properly (it uses the state of the event
at the target, which means related target is the same as when it was
at the target). This might cause leaks when the event's relatedTarget
is inside a shadow tree. This change makes it so at window context,
the relatedTarget used is the relatedTarget of the last
NodeEventContext.

Bug: 817222
Change-Id: I1edea3977202b0a05e3e8ea46a5b8c1edb4b834d
Reviewed-on: https://chromium-review.googlesource.com/1248244Reviewed-by: default avatarHayato Ito <hayato@chromium.org>
Commit-Queue: Rakina Zata Amni <rakina@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594606}
parent 1934d5c0
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third_party/WebKit/LayoutTests/external/wpt/dom/events/shadow-relatedTarget.html 0 → 100644
View file @ 9da0291b
<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<!--
This test is adopted from Olli Pettay's test case at
http://mozilla.pettay.fi/shadow_focus.html
-->
<div id="host"></div>
<input id="lightInput">
<script>
const root = host.attachShadow({ mode: "closed" });
root.innerHTML = "<input id='shadowInput'>";
async_test((test) => {
root.getElementById("shadowInput").focus();
window.addEventListener("focus", test.step_func_done((e) => {
assert_equals(e.relatedTarget, host);
}, "relatedTarget should be pointing to shadow host."), true);
lightInput.focus();
}, "relatedTarget should not leak at capturing phase, at window object.");
async_test((test) => {
root.getElementById("shadowInput").focus();
lightInput.addEventListener("focus", test.step_func_done((e) => {
assert_equals(e.relatedTarget, host);
}, "relatedTarget should be pointing to shadow host."), true);
lightInput.focus();
}, "relatedTarget should not leak at target.");
</script>
third_party/blink/renderer/core/dom/events/window_event_context.cc
View file @ 9da0291b
......@@ -45,6 +45,7 @@ WindowEventContext::WindowEventContext(
return;
window_ = ToDocument(top_node_event_context.GetNode())->domWindow();
target_ = top_node_event_context.Target();
related_target_ = top_node_event_context.RelatedTarget();
}
bool WindowEventContext::HandleLocalEvents(Event& event) {
......@@ -53,6 +54,8 @@ bool WindowEventContext::HandleLocalEvents(Event& event) {
event.SetTarget(Target());
event.SetCurrentTarget(Window());
if (RelatedTarget())
event.SetRelatedTargetIfExists(RelatedTarget());
window_->FireEventListeners(event);
return true;
}
......@@ -60,6 +63,7 @@ bool WindowEventContext::HandleLocalEvents(Event& event) {
void WindowEventContext::Trace(blink::Visitor* visitor) {
visitor->Trace(window_);
visitor->Trace(target_);
visitor->Trace(related_target_);
}
} // namespace blink
third_party/blink/renderer/core/dom/events/window_event_context.h
View file @ 9da0291b
......@@ -43,6 +43,7 @@ class WindowEventContext : public GarbageCollected<WindowEventContext> {
LocalDOMWindow* Window() const;
EventTarget* Target() const;
EventTarget* RelatedTarget() const;
bool HandleLocalEvents(Event&);
void Trace(blink::Visitor*);
......@@ -50,6 +51,7 @@ class WindowEventContext : public GarbageCollected<WindowEventContext> {
private:
Member<LocalDOMWindow> window_;
Member<EventTarget> target_;
Member<EventTarget> related_target_;
DISALLOW_COPY_AND_ASSIGN(WindowEventContext);
};
......@@ -61,6 +63,10 @@ inline EventTarget* WindowEventContext::Target() const {
return target_.Get();
}
inline EventTarget* WindowEventContext::RelatedTarget() const {
return related_target_.Get();
}
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_EVENTS_WINDOW_EVENT_CONTEXT_H_
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