LoadURI is in fact implemented in XBL with JavaScript, see
http://lxr.mozilla.org/seamonkey/source/toolkit/content/widgets/browser.xml#138
Shane

Mark Hammond wrote:
>  It may be that the method you want is not defined in an IDL file at all, but
>  with custom code supporting only JS.  For example, to implement an
>  openDialog() method, I ended up with code:
>  
>          svc = components.classes['@mozilla.org/embedcomp/window-watcher;1']
>  >                 .getService(components.interfaces.nsIWindowWatcher)
>          # Wrap in an nsIArray with special support for Python being able to
>          # access the raw objects if the call-site is smart enough
>          args = _nsdom.MakeArray(args)
>          ret = svc.openWindow(self._comobj_, url, name, features, args)
>          # and re-wrap in one of our "dom" objects
>          ...
>  
>  Although this relies on features only in the nsdom code, the underlying
>  point is that you may be able to convince the window-watcher to do what you
>  need, but sadly I've no time to dig deeper into this today...
>  
>  Cheers,
>  
>  Mark
>  
> > Hello.
> > Spent last night trying to figure out how to port mybrowser (
> > http://benjamin.smedbergs.us/xulrunner/mybrowser-0.2.2.xulapp ) from
> > JavaScript to Python.
> > It fails at LoadURI() - AttributeError: XPCOM component
> > '<unknown>' has
> > no attribute 'LoadURI'
> > I tried to get all available interfaces and blindly query
> > browser for them:
> >
> >     browser = document.getElementById("browser")
> >     for name, iid in components.interfaces.items():
> >     try:
> >             browser.queryInterface(iid)
> >             dump(str(name)+'\n')
> >     except:
> >             donothing()
> >
> > Here is what i got:
> >
> > nsISupportsWeakReference
> > nsIObserver
> > nsIDOMXULElement
> > nsIDOM3Node
> > nsIDOM3EventTarget
> > nsIDOMEventTarget
> > nsIAccessibleProvider
> > nsIDOMNSEventTarget
> > nsIDOMElementCSSInlineStyle
> > nsIDOMNode
> > nsIDOMEventListener
> > nsIDOMNSElement
> > nsIClassInfo
> > nsISupports
> > nsIDOMElement
> >
> > Checked all of them, and it seems that none is capable of
> > anything that
> > browser is supposed to do (like, loading URI).
> > So...this is not implemented, or it's just my poor
> > Python/XPCOM skills?
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> >
>  
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