[RenderTreeBuilder] Subtree moving should clear the floats on all the descendants

• Component: Layout and Rendering
• Status: RESOLVED FIXED

[zalan]

<rdar://76837320>

and not only on the root of the move.

[zalan]

Created attachment 426955 [details]
Patch

[Antti Koivisto]

Comment on attachment 426955 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=426955&action=review

> Source/WebCore/ChangeLog:9
> +        While moving a subtre, we invalidate the floating object list so that we don't end up with incorrectly placed floats (they'll get regenerated during the subsequent layout).

We should really stop moving subtrees. Also spelling.

[zalan]

(In reply to Antti Koivisto from comment #2)
> Comment on attachment 426955 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=426955&action=review
> 
> > Source/WebCore/ChangeLog:9
> > +        While moving a subtre, we invalidate the floating object list so that we don't end up with incorrectly placed floats (they'll get regenerated during the subsequent layout).
> 
> We should really stop moving subtrees. Also spelling.
Yes and yes. I wonder what we'll come up with for LFC where the layout nodes (renderers) don't store layout states so moving subtrees is nothing but a simple re-parenting activity, while we have to run invalidation on the formatting state objects.

[zalan]

Created attachment 426979 [details]
[fast-cq] Patch

[EWS]

Committed r276549 (236989@main): <https://commits.webkit.org/236989@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 426979 [details].