[Webkit-unassigned] [Bug 145318] New: [iOS] scrollIntoViewIfNeeded is not working with scroll-snap points

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=145318

            Bug ID: 145318
           Summary: [iOS] scrollIntoViewIfNeeded is not working with
                    scroll-snap points
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: iOS
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bfulgham at webkit.org

In Bug 145216, I corrected a problem where programmatic scrolls did not update the scroll snap state.

Unfortunately, I did not recognize that these changes were not sufficient to correct the problem in iOS, because many of the ScrollAnimator methods used on Mac are stubbed out on iOS.

This needs to be corrected so that the iOS ScrollAnimator knows about the current scroll snap offset index, so that its default '0' value doesn't keep getting retrieved by WebCore code and resetting the offset.

It may be that iOS should keep around a ScrollController object so that we can share the axis offset handling code between the two ports.

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