[Webkit-unassigned] [Bug 176914] Async iframes in the scrolling tree should be in the z-index order

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Sep 28 13:53:48 PDT 2017


--- Comment #12 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
Yeah, I started on this and it's tricky. We need to pass a childIndex or previousSibling in when adding scrolling nodes to the scrolling tree, but it's hard to compute those when we're not in the middle of a tree walk.

I considered adding a new z-order RenderLayer tree walk to rebuild the scrolling tree after mutations. Hopefully that's not too common.

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