Hello,

First of all I would like to thank Mark Hammond for the great work on 
PyXPCOM.

I have been able to use PyXPCOM with an existing Mozilla 0.9.1 milestone 
I already had on
my linux computer. This is an rpm package from Ximian (downloaded with 
Red-Carpet)
which also included a mozilla-devel rpm package and nspr/ nspr-devel 
packages.
Therefore  I (and a lot of other Linux users) already have all the *.idl 
and *.h files needed
on their computers. I only had to compiled a shared library of Python 
2.0, which however
is not completely trivial, because there is no makefile target to do 
that, see 
http://sourceforge.net/tracker/?func=detail&atid=305470&aid=400938&group_id=5470).

I did not have to download the complete mozilla source and compile the 
whole beast, which
is basically impossible on my computer system. Instead, I only had to 
`cvs checkout' the
mozilla/extensions/python/xpcom and change the makefile to find the 
*.idl and *.h files.

So, now I have a working PyXPCOM and I can use a lot of services without 
any problems.
However, I have a problem, that might be related to the PyXPCOM handling 
of [native] pointers in
idl. I wanted to implement the nsICmdLineService in Python. For Mozilla 
0.9.1 it's given by:

#include "nsISupports.idl"
#include "nsIFactory.idl"
[ptr] native charArray(char*);
[scriptable, uuid(e34783f4-ac08-11d2-8d19-00805fc2500c)]
interface nsICmdLineService : nsISupports{
    string Initialize(in long argc);
    string getCmdLineValue(in string argc);
    readonly attribute string URLToLoad;
    readonly attribute string programName;
    readonly attribute long argc;
    [noscript] readonly attribute charArray argv;};

My implementation looks like:

import xpcom
class nsIMyCmdLineService:
    _com_interfaces_ = xpcom.components.interfaces.nsICmdLineService
    _reg_clsid_ = "{e34783f5-ac08-11d2-8d19-00805fc2500c}"
    _reg_contractid_ = "@mozilla.org/appshell/commandLineService;1"
    def Initialize( self, param0 ):
        print "commandLineService: Initialize"
        print "param0: ",param0
    def getCmdLineValue( self, param0 ):
        print "commandLineService: getCmdLineValue"
        return "noresult"
    def get_URLToLoad( self ):
        print "commandLineService: get_URLToLoad"
        return ""
    def get_programName( self ):
        print "commandLineService: get_programName"
        return "MyMozilla"
    def get_argc( self ):
        print "commandLineService: get_argc"
        return 1
    def get_argv( self ):
        print "commandLineService: get_argv"
        return ("MyMozilla")

My problem is with the get_argv routine. It's out value is defined as
       readonly attribute charArray
and charArray is defined by
      [ptr] native charArray(char*);

If I use this method, I get the warning:
    PyXPCOM Warning: Converting Python object for an [out] param - The 
object type (0xd) is unknown - leaving param alone!

I have the feeling that the void* type is not recognized/handled by 
PyXPCOM. Does anybody have a solution to this?


greetings

Marco Bosch




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