[Webkit-unassigned] [Bug 199222] [iOS Scrolling] Propagate scrolls to non-nested UIScrollViews

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=199222

--- Comment #6 from Antti Koivisto <koivisto at iki.fi> ---
> I'm having a hard time convincing myself that using
> relatedScrollContainerIDs()[0] is correct. What does it mean to have more
> than one? What is the order?

Would knowing that you wrote the code that sets it be help? :)

It is simply the layer tree counterpart of ScrollingTreeOverflowScrollProxyNode::m_overflowScrollingNodeID. Having Moves  and Stationary cases in a single vector matches the old design where PositionedNode handled both cases. It should really be refactored into two separate variables, matching PositionedNode split.

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