[Webkit-unassigned] [Bug 135768] New: Implement scroll snapping animations on Mac

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=135768

           Summary: Implement scroll snapping animations on Mac
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Unspecified
            Status: NEW
          Severity: Enhancement
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: wenson_hsieh at apple.com
                CC: bdakin at apple.com, simon.fraser at apple.com,
                    dino at apple.com, jonlee at apple.com, thorton at apple.com


Implement scroll snapping logic for use on Mac. Since there is no simple way to retarget the scroll destination on Mac (as opposed to iOS) we'll need to override momentum events and replace the animation curve with a custom one. This patch adds logic needed to compute the snap scrolling animation curve given parameters such as initial velocity and the target snap offset. Note: this doesn't actually make any elements snap -- it's just the methods needed to compute and animate offsets.

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