162191 - inefficient incremental reflow for positioned inline frames with absolute children

Status: NEW

(Core :: Layout: Block and Inline, defect, P3)

Description

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

Bug 75121 contains a fix for block frames but not inline frames.  We should
consider doing the same or a similar fix in nsPositionedInlineFrame, although
it's a bit lower priority and we'd really need to find some testcases.

(It's also worth double-checking that we don't need to do bug 154230 for them as
well, although I don't think we do based on the comments there.)

Comment 1

[Hixie (not reading bugmail)]

.

Comment 2

[webget50]

Attachment: testcase

Press "move" button to start reflowing
Notice the red div moves before the blue div, even though the blue div is a child of the red div.  The blue div looks almost as if it is sliding off the red div.  The bug becomes easier to see when the document size increases and the increment speed increases.

Comment 3

[webget50]

Attachment: Screenshot of the bug

Comment 4

[Boris Zbarsky [:bzbarsky]]

Comment 2 and comment 3 have nothing to do with this bug, as far as I can tell.

Comment 5

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

We should look into whether this was fixed by bug 300030.

Comment 6

[Carlos Alén Silva]

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.4) Gecko/20100503 Firefox/3.6.4

Seems fixed on Fx 3.6.4.

Comment 7

[José Jeria]

WFM: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a5pre) Gecko/20100506 Minefield/3.7a5pre

Comment 8

[Sylvestre Ledru [:Sylvestre]]

Moving to p3 because no activity for at least 1 year(s).
See https://github.com/mozilla/bug-handling/blob/master/policy/triage-bugzilla.md#how-do-you-triage for more information