[Webkit-unassigned] [Bug 87954] New: [Qt][WK2] setPageItemRectVisible() is not guarded by ViewportUpdateDeferrer at QtViewportInteractionEngine::scaleAnimationValueChanged().

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=87954

           Summary: [Qt][WK2] setPageItemRectVisible() is not guarded by
                    ViewportUpdateDeferrer at
                    QtViewportInteractionEngine::scaleAnimationValueChange
                    d().
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Qt
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: zbujtas at gmail.com


Guarding is set up at scaleAnimationStateChanged to protect setPageItemRectVisible().
However, setting the end value on the ScaleAnimation object at animatePageItemRectVisible(), triggers scaleAnimationValueChanged, before animation is started. (and state changed is called)

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