295831 - DOMMouseScroll reports incorrect dom node when over a "SELECT" element (firefox on linux only)

Status: RESOLVED WORKSFORME

(Core :: DOM: Events, defect)

Description

[Avi Halachmi (:avih)]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4

When registering "DOMMouseScroll" event, and scrolling the mouse wheel over a
"SELECT" or "OPTION" element, then the event handler doesn't get the correct
node from the event.

This only happens with firefox on linux (it's ok with firefox on win32 and with
mozilla on linux)

The trigger for this issue was that linux users reported that my extension
(SmoothWheel) doesn't work well on drop down boxes. I've issued a fix but the
main issue is that it behaves differently on linux/windows.

avih

Reproducible: Always

Steps to Reproduce:
1. enter the next XUL code, save it as "test.xul" and open it with firefox
(1.04) on linux:
--------------------------------------
<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
<dialog id="testdomscroll"
  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
  xmlns:html="http://www.w3.org/1999/xhtml"
  onload="myonload();"
>
<script type="application/x-javascript">

function myonload(){
addEventListener("DOMMouseScroll", captureevent, false);
}

function captureevent(e){
alert("target dom node name: "+e.explicitOriginalTarget);
}
</script>

<html:select>
<html:option>1111</html:option>
<html:option>2222</html:option>
<html:option>3333</html:option>
</html:select>

</dialog>
--------------------------------------

2. move the mouse cursor over the (closed) "drop-down" list and scroll thw wheel

3. click the "drop-down" box to show the available options. move the mouse
cursor over the opened list and scroll the mouse wheel.
Actual Results:  
after step 2: displayed: "target dom node name: [object XULElement]
after step 3: displayed: "target dom node name: [object HTMLSelectElement]

Expected Results:  
after step 2: should display: "target dom node name: [object HTMLSelectElement]
after step 3: should display: "target dom node name: [object HTMLOptionElement]

Comment 1

[Andrew Schultz]

Yes, the bug exists with linux firefox 1.0.x (although it worksforme with suite
1.7.8).  But it's been fixed since then (worksforme with current trunk firefox)
and 1.7.x branch of gecko is only receiving security fixes.

resolving WORKSFORME