Bug 121843

Summary:

[CSS Regions] Propagating margins fails when there's a <p> inside the flowed <div>

Product:

WebKit

Reporter:

Mihai Maerean <mmaerean>

Component:

WebCore Misc.

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED INVALID

Severity:

Normal

CC:

WebkitBugTracker

Priority:

Version:

528+ (Nightly build)

Hardware:

Unspecified

OS:

Unspecified

Bug Depends on:

Bug Blocks:

57312

Attachments:

Description	Flags
patch to delete the expected png(s) and to add the -expected.html file	none
test with regions	none
html without regions	none

Description Mihai Maerean 2013-09-24 09:22:41 PDT

Created attachment 212474 [details]
patch to delete the expected png(s) and to add the -expected.html file

When there's a <p> inside <div style="flow-into:flow">, the margins of the paragraph should collapse with the parent div but they don't.

The LayoutTests/fast/regions/flow-content-basic.html test can't be turned into a ref test.
The current expected png results are not correct.

This bug blocks bug #120457.

Comment 1 Mihai Maerean 2013-09-25 02:02:37 PDT

Created attachment 212542 [details]
test with regions

Comment 2 Mihai Maerean 2013-09-25 02:03:50 PDT

Created attachment 212543 [details]
html without regions

Comment 3 Mihai Maerean 2013-10-01 04:51:25 PDT

This bug is invalid because:

1. In CSS, the adjoining margins of two or more boxes (which might or might not be siblings) can combine to form a single margin. Two margins are adjoining if and only if both belong to in-flow block-level boxes that participate in the same block formatting context ( http://www.w3.org/TR/CSS2/box.html#collapsing-margins )

2. CSS Regions establish a new block formatting Context. ( http://dev.w3.org/csswg/css-regions/ )