Bug 64975

Summary:

Column spans and multi-column elements should not collapse margins with their children

Product:

WebKit

Reporter:

Dave Hyatt <hyatt>

Component:

Layout and Rendering

Assignee:

Dave Hyatt <hyatt>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

bdakin, phiw2

Priority:

Version:

528+ (Nightly build)

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Patch	bdakin: review+

Dave Hyatt

Reported 2011-07-21 14:00:21 PDT

Column spans and multi-column elements should establish block formatting contexts. They mostly do except for the part where they should not be collapsing margins with their children. This bug is about fixing the margin collapsing issue.

Attachments
Patch (1.72 KB, patch) 2011-07-21 14:02 PDT, Dave Hyatt	bdakin: review+	Details Formatted Diff Diff
View All Add attachment proposed patch, testcase, etc.

Dave Hyatt

Comment 1 2011-07-21 14:02:30 PDT

Created attachment 101642 [details] Patch

Dave Hyatt

Comment 2 2011-07-21 14:17:11 PDT

Fixed in r91497. A bunch of multicol tests will need to be rebaselined. I'm on Lion so can't do SL.

Philippe Wittenbergh

Comment 3 2011-07-22 18:19:22 PDT

Should '-webkit-column-count:0' establish a block formatting context and prevent margin-collapse through ? It does with the latest nightly (r91611) on Snow leopard. The spec says: "Values must be greater than 0" http://dev.w3.org/csswg/css3-multicol/#cc Opera 11.5 does not establish a BFC - the margins of the child element collapse through (unless of course the multi-col element has a border) testcase: http://dev.l-c-n.com/CSS3/multi-col/multicol-bfc3.html

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