546596 - Using table:hover to reveal an absolutely positioned child of <caption> doesn't work

Status: RESOLVED DUPLICATE of bug 63895

(Core :: Layout, defect)

Description

[Henri Sivonen (:hsivonen)]

Build from trunk around 2010-02-12.

Steps to reproduce:
 1) Load http://webkit.org/demos/hover-summary/example2.html
 2) Move the mouse cursor over the table.

Actual results:
The width of the table changes and scrollbars appear on the viewport.

Expected results:
Expected a yellow box to appear under the table as in WebKit and Opera.

Comment 1

[Maciej Stachowiak]

What's actually happening is that the hover box appears scrolled out of view. 

I assume this happens because Gecko considers the viewport to be the containing block of the absolute positioned content. But the table should be its containing block, because the table has position relative. That's my best guess as to the cause.

Comment 2

[philippe (part-time)]

(In reply to comment #1)
 
> I assume this happens because Gecko considers the viewport to be the containing
> block of the absolute positioned content. But the table should be its
> containing block, because the table has position relative. 

That is a known issue: bug 63895. I suppose this should be duped.