[Webkit-unassigned] [Bug 250361] New: [UI-side compositing] Sequence of wheel events doesn't trigger DOM handlers
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon Jan 9 22:30:22 PST 2023
https://bugs.webkit.org/show_bug.cgi?id=250361
Bug ID: 250361
Summary: [UI-side compositing] Sequence of wheel events doesn't
trigger DOM handlers
Product: WebKit
Version: WebKit Local Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: Scrolling
Assignee: webkit-unassigned at lists.webkit.org
Reporter: simon.fraser at apple.com
CC: simon.fraser at apple.com
With UI-side compositing enabled, fast/scrolling/mac/momentum-animator-end-event-stops.html reveals a bug where only the first wheel event is dispatched to JS because `WebPage::wheelEvent()` never calls the `send(Messages::WebPageProxy::DidReceiveEvent()` so subsequent events are held up via WebWheelEventCoalescer::shouldDispatchEvent() having a non-empty m_eventsBeingProcessed.
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