Bug 217806

Summary:	RenderStyle::diff() can return Equal when eventListenerRegionTypes() differ
Product:	WebKit	Reporter:	Simon Fraser (smfr) <simon.fraser>
Component:	Layout and Rendering	Assignee:	Nobody <webkit-unassigned>
Status:	NEW
Severity:	Normal	CC:	bfulgham, koivisto, simon.fraser, webkit-bug-importer, zalan
Priority:	P2	Keywords:	InRadar
Version:	Safari Technology Preview
Hardware:	Unspecified
OS:	Unspecified

Simon Fraser (smfr)

Reported 2020-10-15 20:34:29 PDT

RenderStyle::diff() doesn't consult eventListenerRegionTypes(), so if we every early-return on Equal, we may have bugs. We probably need a new StyleDiff value for this.

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Simon Fraser (smfr)

Comment 1 2020-10-15 20:35:12 PDT

For example RenderElement::styleWillChange() needs to hit layer->invalidateEventRegion().

Radar WebKit Bug Importer

Comment 2 2020-10-22 20:35:18 PDT

<rdar://problem/70601723>

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