[Webkit-unassigned] [Bug 104928] New: getRegionsByContent() false positive for overset content

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=104928

           Summary: getRegionsByContent() false positive for overset
                    content
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
               URL: https://github.com/mike-sierra/webplatform/blob/master
                    /examples/t_getRegionsByContent.html
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: letmespellitoutforyou at gmail.com
                CC: mihnea at adobe.com


Load page into browser. The page runs a timer to successively hide green content elements.   At each step, the message reports on getRegionsByContent() matches for red content.   Before trailing red content comes into view, getRegionsByContent() inaccurately reports that the last region in the chain contains part of it.  The # of regions should be 0 until red content becomes visible.

I assume this behavior would be valid if region-fragment (or -webkit-region-overflow) were not set to 'break', i.e., when overflow-y makes downstream red content accessible.

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