142461 - overflow: hidden gets in the way

Status: RESOLVED FIXED

(Core :: Web Painting, defect, P1)

Description

[Jean-Claude Manoli]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0rc1)
Gecko/20020417
BuildID:    2002041711

When an absolutely positioned div has the overflow property set to "hidden", the
hidden part of the div is not displayed as expected, but any page content behind
that hidden part is not rendered as well.

Reproducible: Always
Steps to Reproduce:
Open http://manoli.net/wot/

Actual Results:  The first <h1> paragraph "Personal Certificates for Web and
Mail" is not displayed, and the first image is truncated.

Expected Results:  The <h1> paragraph should be displayed and the image should
not be truncated.

Comment 1

[Jean-Claude Manoli]

Attachment: A simple page illustrating the problem.

Comment 2

[Boris Zbarsky [:bzbarsky]]

Confirmed on Linux as well.  Raising severity, since this is a fairly common
thing to do with positioned content....

Comment 3

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Definitely mine.

Comment 4

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Attachment: Fix

Need to generalize the test for whether part of a view is being clipped out and
therefore the view should be marked transparent. It needs to be checked on both
"clip:" and "overflow: hidden". (The "overflow: hidden" case matters when the
view is larger than its frame.)

Comment 5

[Robert O'Callahan (:roc) (email my personal email if necessary)]

CCing review buddies

Comment 6

[Kevin McCluskey (gone)]

Comment on attachment 85717 [details] [diff] [review]
Fix

r=[e-mail]

Comment 7

[Chris Waterson]

Comment on attachment 85717 [details] [diff] [review]
Fix

sr=waterson

Comment 8

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Fix checked into trunk.