536419 - Missing :before and :after detection during style reresolution is too eager in {ib} splits

Status: NEW

(Core :: CSS Parsing and Computation, defect)

Description

[Boris Zbarsky [:bzbarsky]]

We need to be a little more careful with it.  See bug 536172.

Comment 1

[Boris Zbarsky [:bzbarsky]]

I'm not quite sure what the best approach here is.  We could just avoid looking
for the :before/:after frame for the "wrong" parts of the ib split, but the
"right" part is sometimes a block part, and in that case newContext is the
wrong parent context for the pseudo-probing.

Comment 2

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Other than bullet (2) in bug 536172 comment 8, this is a performance bug and not a correctness bug, right?

Comment 3

[Boris Zbarsky [:bzbarsky]]

Well, it leads to us reframing in more cases that we need to.  It's only a correctness bug insofar as reframing loses state (plug-ins, caret stuff, selection all come to mind offhand).