Bug 254247

Summary:	[UI-side compositing] Send events to the WebWheelEventCoalescer before sending them to the scrolling thread
Product:	WebKit	Reporter:	Simon Fraser (smfr) <simon.fraser>
Component:	Scrolling	Assignee:	Simon Fraser (smfr) <simon.fraser>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	simon.fraser, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Simon Fraser (smfr) 2023-03-21 18:19:59 PDT

Even if wheel events go to the scrolling thread, they may also get dispatched to the web process, and in this case we have to avoid starting the handling of another event in the UI process until that handling is complete.

Comment 1 Radar WebKit Bug Importer 2023-03-21 18:20:30 PDT

<rdar://problem/107032016>

Comment 2 Simon Fraser (smfr) 2023-03-21 18:25:30 PDT

Pull request: https://github.com/WebKit/WebKit/pull/11788

Comment 3 EWS 2023-03-23 08:19:37 PDT

Committed 262015@main (43c540f60166): <https://commits.webkit.org/262015@main>

Reviewed commits have been landed. Closing PR #11788 and removing active labels.