372303 - in-flow tables' vertical margins don't collapse with adjacent in-flow block-level elements

Status: RESOLVED DUPLICATE of bug 87277

(Core :: Layout: Tables, defect)

Description

[Sam Goldman]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.1.2) Gecko/20070219 Firefox/2.0.0.2
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.1.2) Gecko/20070219 Firefox/2.0.0.2

Because a table display type is "table" and not "block," I believe the rendering engine is not collapsing a table's vertical margins with an adjacent header tag. IE and Safari get it right as far as I can tell from the specs.

In the css spec under "block-level elements and block boxes" the table display type is categorized as a block-level element so I am relatively sure this behavior is incorrect.

If I change the display css attribute of the table to "block," the margin collapse issue is fixed, but the table renders incorrectly (obviously).

Reproducible: Always

Steps to Reproduce:
1. create an in-flow header with margin: 20px and the rest default.
2. create an in-flow table with margin: 20px and the rest default.
Actual Results:  
There is a 40px space between the header and the margin.

Expected Results:  
There should be a 20px margin between them, because they should collapse according to the spec AFAICT.

Comment 1

[Sam Goldman]

Attachment: reduced test-case

Comment 2

[Steve England [:stevee]]

Have you tried a trunk build? Lots of reflow/layout/rendering work has been done on it. 3.0a3 @ http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/

Comment 3

[philippe (part-time)]

Dupe of bug 87277 ?

Comment 4

[Gérard Talbot]

Yes, I would resolve it as a dup of bug 87277 although this bug involves margin collapsing between a block-level element (<h1>) and a nextSibling table while bug 87277 refers to tables as consecutive siblings. It's still adjacent in-flow block-level elements..

Comment 5

[Gérard Talbot]

CONFIRMING, marking as NEW

Marking as dependent on bug 50959

Component: Layout: Tables

Version: trunk

URL field updated

Comment 6

[Gérard Talbot]

I'm not sure .. maybe Component should be instead/rather 
Layout: Block and Inline

Seamonkey 2.0a1pre rv:1.9b3pre build 2008010102 under XP Pro SP2 and Firefox 2.0.0.11 fail the test case at provided URL.

Comment 7

[Alexander]

Table generate anonymous block box, but table can't collapse with this box, because table is not block level element.

Comment 8

[Patrick Dark]

Note sure why this was marked "depends on" bug 87277; it should be a duplicate.

The problems both boil down to "table box margins don't collapse like normal blocks" and the solutions both boil down to "make table box margins collapse like normal blocks".