Thanks for all of your input - maybe I need to make things a bit clearer.
I wish to be able to implement:
out string GetVersion(out string aValue);
so that I can obtain a string returned from the C++ code via javascript in
this fashion. Is this possible?.
All I have been able to use so far is:
void GetVersion(out string aValue)
This returns nothing but a void as a return value. In order to minimize the
changes necessary to our present
Javascript code I need to be able to return a string as a function return -
and not from a function parameter
return value.
Thanks
Patrick McHale
Powerlan USA.
"Rick Parrish" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Patrick McHale wrote:
>
> > In our IDL file we have tried using
> >
> > string GetVersion();
> >
> > The idl file generates:
> >
> > NS_METHOD GetVersion(char * _retval)
> >
>
>
> The C++ class interface stub should be producing something like
>
> NS_METHOD GetVersion([out, retval] char ** _retval);
>
> You could also experiment with making the function a readonly
> attribute from IDL as in ...
>
> attribute readonly string GetVersion;
>
> From JavaScript you would call the method using syntax similar
> to the IDL description. From C++ you would use the latter syntax.
>
> // JS
> var x = component.GetVersion();
>
> // C++
> char *pStr = NULL;
> nsResult ret = pObj->GetVersion(*pStr);
> // do something with pStr and then ...
> nsMemory::Free(pStr);
> // its caller's job to release the returned string's memory.
>
>
> > My question is - can we still use this method and how is
> > this implemented. At the present time is to write Java Glue to achieve
> > this - but this is not seamless and will require a large amount of glue
to
> > be implemented. We want to avoid having thousands of tech support calls
and
> > wish to be able to continue using original HTML code with minimal
changes
> > necessary to implement XPCOM.
>
>
> I assume you meant JavaScript and not Java. Using XPCOM you can access
> just about any property or method on an XPCOM component.
>
>
> > Above is an example using the method GetVersion which produces a return
> > string. In actuality we have at least 30 other routines that need to be
> > setup.
>
>
> It isn't clear to me whether you are needing to implement your own
> XPCOM components. If that is the case, you can write them in C++ or
> JavaScript and then manipulate them from your XUL or HTML embedded
> JavaScript.
>
> Post here or email me directly if you need help on this.
>
>
> > With Thanks
> >
> > Patrick McHale
> > Software Engineer
> >
> > Paul Baxter
> > Principal Software Engineer
> >
> > Powerlan U.S.A.
>
>
> Regards,
> Rick
>
