Bug 229747

Summary:

REGRESSION (r280017): Calling getBoundingClientRect() on an empty element with "break-before: column" in columns returns a rect with all zeros

Product:

WebKit

Reporter:

Simon Fraser (smfr) <simon.fraser>

Component:

DOM

Assignee:

Simon Fraser (smfr) <simon.fraser>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

bya, changseok, esprehn+autocc, ews-watchlist, glenn, kondapallykalyan, pdr, simon.fraser, tom.hamming, zalan

Priority:

Keywords:

InRadar

Version:

Safari Technology Preview

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Test case	none
Test case	none
Patch	none

Description Simon Fraser (smfr) 2021-08-31 17:30:44 PDT

Calling getBoundingClientRect() on a 0x0 element in columns returns a rect with all zeros.

Comment 1 Simon Fraser (smfr) 2021-08-31 17:30:57 PDT

<rdar://82537314>

Comment 2 Simon Fraser (smfr) 2021-08-31 17:34:01 PDT

Created attachment 436973 [details]
Test case

Comment 3 Simon Fraser (smfr) 2021-08-31 17:38:08 PDT

Conceptually we are trying to answer the question "for this 0x0 rect at y=100, in columns with height 100, is it at the bottom of column 1 or the top of column 2".

Comment 4 Simon Fraser (smfr) 2021-08-31 17:42:57 PDT

Created attachment 436974 [details]
Test case

Ironically Chrome and FF have exactly opposite behaviors.

Comment 5 Simon Fraser (smfr) 2021-09-02 18:54:45 PDT

Created attachment 437230 [details]
Patch

Comment 6 EWS 2021-09-06 12:30:26 PDT

Committed r282063 (241363@main): <https://commits.webkit.org/241363@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 437230 [details].

Comment 7 Simon Fraser (smfr) 2021-09-07 14:14:19 PDT

*** Bug 230020 has been marked as a duplicate of this bug. ***