322947 - Page scrolls up when clicking the middle mouse button in frame

Status: RESOLVED FIXED

(Core :: Widget: Win32, defect)

Description

[Johannes Buchner]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20060110 Firefox/1.6a1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20060110 Firefox/1.6a1

When the middle button is clicked, the browser scrolls upwards

Reproducible: Always

Steps to Reproduce:
1. open site http://www.tv-testbild.com/
2. go down
3. middle click on a free area inside the site

Actual Results:  
the site is scrolled upwards

Expected Results:  
there should be just the icon for scrolling

No, it isn't a javascript, 'cause NoScript would be blocking it.

Comment 1

[Ria Klaassen (not reading all bugmail)]

This is a regression between 1.9a1_2005120122 and 1.9a1_2005120122.

http://bonsai.mozilla.org/cvsquery.cgi?treeid=default&module=PhoenixTinderbox&branch=HEAD&branchtype=match&dir=&file=&filetype=match&who=&whotype=match&sortby=Date&hours=2&date=explicit&mindate=2005-12-01+21%3A00%3A00&maxdate=2005-12-02+06%3A00%3A00&cvsroot=%2Fcvsroot

Comment 2

[Martijn Wargers (dead)]

Attachment: testcase

I can reproduce this bug sometimes.
I hope/think this testcase shows the issue.

To reproduce:
- Move over the green div.
- Mouse down, the yellow div moves under the mouse

Result:
Sometimes, extra 'mousemove' numbers appear, and even more sometimes, they are red. When they are red, they correspond to event.clientY - offset of the mouse position of the green div. Same for the x value.

If you don't see it happening right away, move the mouse again somewhere in the green div and try again. It should normally happen within 5 times.

Comment 3

[Worcester12345]

(In reply to comment #2)
> Created an attachment (id=208139) [edit]
> testcase
> 
> I can reproduce this bug sometimes.
> I hope/think this testcase shows the issue.
> 
> To reproduce:
> - Move over the green div.
> - Mouse down, the yellow div moves under the mouse
> 
> Result:
> Sometimes, extra 'mousemove' numbers appear, and even more sometimes, they are
> red. When they are red, they correspond to event.clientY - offset of the mouse
> position of the green div. Same for the x value.
> 
> If you don't see it happening right away, move the mouse again somewhere in the
> green div and try again. It should normally happen within 5 times.
> 



Seeing what you describe with Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8) Gecko/20060111 Firefox/1.5

Comment 4

[Ere Maijala (slow)]

Attachment: Patch v1

Patch v1. Disable MouseTrailer for the whole duration of the mouse event handling. This way it can't interfere in the middle of the popup window with the arrows being created. Fixes also one comment in MouseTrailer. Also works with all the testcases from previous regressions.

Comment 5

[Johannes Buchner]

Funny. I had this bug also on this site: 
https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird

Comment 6

[Ere Maijala (slow)]

Fix checked in to trunk.