40584 - [EVENTTARG]A hidden DIV prevents clicking on links underneath it

Status: VERIFIED DUPLICATE of bug 42356

(Core :: DOM: UI Events & Focus Handling, defect, P3)

Description

[Stephen Moehle]

The attached html page has an href that on onmouseover should show a DIV that is
normally hidden.  The DIV is supposed to behave like a submenu. In both IE5 and
Communicator 4.73, this works, but in Mozilla (latest nightly build -
2000052420), the DIV is never shown.

I know nothing of DIVs so my apologies if this is just bad html, but I took this
example from a commercial app.

Comment 1

[Stephen Moehle]

Attachment: Testcase for this bug

Comment 2

[Stephen Moehle]

Attachment: Test case for bug part 2

Comment 3

[Stephen Moehle]

Bug part 2:  OK.  So maybe this has nothing to do with Javascript.  Take a look 
at the second attachment.  It is a page with two hrefs on it.  The second href, 
"Non working link", is underneath the hidden DIV.  Move the mouse back and forth 
over the link, and you will the the cursor flicker between the pointing finger 
and the arrow.  In addition, clicking on the link does nothing.  Needless to 
say, this also work fine in IE5 and Communicator.

Comment 4

[Stephen Moehle]

The first part of this bug is clearly a duplicate of <A 
HREF="show_bug.cgi?id=34667">bug 34667</A>, but the second part is still true.  
I changed the summary and changed the component to HTML Element.

Comment 5

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

Attachment: simplified testcase

Comment 6

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

Confirming, changing component to Event Handling, and reassigning.  Changing to
All/All from PC/Windows NT since I see it on Linux (05-30 build).

This is weird.  It looks (visually) like GetFrameForPoint is doing the right
thing - the link goes into the :active state, and the pointer changes (but in a
very weird way - it flashes when moved).  However, clicking the link in the part
where the div is over it (the right part in my simplified testcase) doesn't
work.  This makes me think the event is somehow being sent incorrectly (perhaps
to the wrong view??).  I haven't seen an event targetting bug like this before.

This seems like a regression.  I'd have to recheck the old testcases for the
EVENTTARG bugs that are fixed.

Comment 7

[Johnny Stenback (:jst)]

*** Bug 36442 has been marked as a duplicate of this bug. ***

Comment 8

[joki (gone)]

Cool.  Definitely a dupe of bug 42356 for which I have a fix pending.

*** This bug has been marked as a duplicate of 42356 ***

Comment 9

[ckritzer (gone)]

Mass update:  changing qacontact to [e-mail]

Comment 10

[Loco]

Updating QA Contact.

Comment 11

[Scott Brodmerkle]

Verified dupe.