230878 - changing broadcaster attribute does not fire any event!

Status: RESOLVED DUPLICATE of bug 230445

(Core :: XBL, defect)

Description

[Manel Mateos]

User-Agent:       Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; es-ES; rv:1.5) Gecko/20031007

If you change 2 times the attribute of a broadcaster to the same value, the 
first time events are fired but the second one doesn't fire any event!

Reproducible: Always

Steps to Reproduce:




try this testcase:
--------- XUL FILE -------------
<?xml version="1.0" encoding="ISO-8859-1"?>
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<broadcasterset>
  <broadcaster id="broadcast" style="color: black"/>
</broadcasterset>

<label value="Test">
  <observes element="broadcast" attribute="style" onbroadcast="alert('Color 
changed');"/>
</label>

<button label="Observer" onclick="document.getElementById
('broadcast').setAttribute('style','color: red');"/>
</window>

Comment 1

[Malcolm Rowe]

I'm not that familiar with XUL, but I wouldn't expect redundant attribute 
changes to fire change events; they don't in many other languages (HTML, to 
name one).

Comment 2

[Manel Mateos]

they are not change events, are broadcaster events! And why up to mozilla 1.4 
the events were fired? why this change in mozilla 1.5?

Comment 3

[Boris Zbarsky [:bzbarsky]]

It worked up to 1.4 due to a bug in XUL -- it fired both change and broadcast
events even when no change happened.  That bug has been fixed.  See dup for more
information.

*** This bug has been marked as a duplicate of 230445 ***