Bug 262661

Summary:	[PointerEvents] preventsCompatibilityMouseEvents is not being reset on Pointer[Up/Cancel] dispatch
Product:	WebKit	Reporter:	Abrar Rahman Protyasha <a_protyasha>
Component:	UI Events	Assignee:	Abrar Rahman Protyasha <a_protyasha>
Status:	NEW ---
Severity:	Normal	CC:	a_protyasha, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://bugs.webkit.org/show_bug.cgi?id=262723

Description Abrar Rahman Protyasha 2023-10-04 15:47:51 PDT

As described in https://www.w3.org/TR/pointerevents/#mapping-for-devices-that-support-hover, whenever a UA dispatches a pointer event:

> "6. If the pointer event dispatched was pointerup or pointercancel, clear the PREVENT MOUSE EVENT flag for this pointerType."

We make sure to implement the earlier case (#4) of setting the PREVENT MOUSE EVENT flag if the pointer event dispatched was pointerdown and the event was canceled, but not this case. Let's fix that.

Comment 1 Radar WebKit Bug Importer 2023-10-04 15:48:00 PDT

<rdar://problem/116490176>

Comment 2 Abrar Rahman Protyasha 2023-10-04 15:54:51 PDT

Pull request: https://github.com/WebKit/WebKit/pull/18657