Subj : Re: Sharing Javascript objects between different XUL windows.
To   : netscape.public.mozilla.jseng
From : Peter Wilson
Date : Thu Dec 30 2004 12:30 pm

Somehow we have two different instances of the same DOM Element (see below).
I tried QueryInterface to nsISupports: they are different objects.

Interestingly, as well as the same siblings, parent etc. the two objects 
share the same attributes. I can set an attribute on one and read it 
back by the other.

This happens even though I am not mutating the DOM in question. Could GC 
be causing this problem. The DOM is shared between different forms.
I am also experiencing occaisional crashes.

Is there any way to turn off GC from the Firefox command line to see if 
this eliminates the problem?

0001: theTreeSrcNode === srcNode
$[2] = [boolean] false
0001: theTreeSrcNode.previousSibling === srcNode.previousSibling
$[3] = [boolean] true
0001: srcNode.id
$[6] = [string] "content-1"
0001: theTreeSrcNode.id
$[7] = [string] "content-1"
0001: theTreeSrcNode == srcNode
$[8] = [boolean] false
0001: theTreeSrcNode.QueryInterface(Components.interfaces.nsISupports)
$[9] = [XULElement] [class: XULElement] {0}
0001: srcNode.QueryInterface(Components.interfaces.nsISupports)
$[10] = [XULElement] [class: XULElement] {0}
0001: srcNode.QueryInterface(Components.interfaces.nsISupports) == 
theTreeSrcNode.QueryInterface(Components.interfaces.nsISupports)
$[11] = [boolean] false
0001: theTreeSrcNode.setAttribute("TEST","TESTVal")
$[12] = [void] void
0001: theTreeSrcNode.getAttribute("TEST")
$[13] = [string] "TESTVal"
0001: srcNode.getAttribute("TEST")
$[14] = [string] "TESTVal"

.