mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-30 00:01:50 +00:00
84 lines
2.6 KiB
Plaintext
84 lines
2.6 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public
|
|
* License Version 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS
|
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
* implied. See the License for the specific language governing
|
|
* rights and limitations under the License.
|
|
*
|
|
* The Original Code is the Mozilla browser.
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape
|
|
* Communications, Inc. Portions created by Netscape are
|
|
* Copyright (C) 1999, Mozilla. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Travis Bogard <travis@netscape.com>
|
|
*/
|
|
|
|
#include "nsISupports.idl"
|
|
|
|
/**
|
|
* The nsIInterfaceRequestor interface defines a generic interface for
|
|
* requesting objects that a given object might implement. This is very
|
|
* similar to QueryInterface found in nsISupports. The main difference being
|
|
* that objects returned from this interface are not required to provide a way
|
|
* back to the object implementing this interface. The semantics of QI()
|
|
* dictate that given an interface A that you QI() on to get to interface B,
|
|
* you must be able to QI on B to get back to A. This interface however
|
|
* allows you to obtain an interface C from A that may or most likely will not
|
|
* have the ability to get back to A.
|
|
*/
|
|
|
|
[scriptable, uuid(033A1470-8B2A-11d3-AF88-00A024FFC08C)]
|
|
interface nsIInterfaceRequestor : nsISupports
|
|
{
|
|
/*
|
|
Asks the object for a listener object supporting a particular interface.
|
|
This method is used to allow the listener to not adhere to the
|
|
QI rules. By providing a a getInterface call the component can have
|
|
completely different objects for each distinct type of interface.
|
|
*/
|
|
void getInterface(in nsIIDRef uuid,
|
|
[iid_is(uuid),retval] out nsQIResult result);
|
|
};
|
|
|
|
|
|
%{C++
|
|
|
|
#ifndef nsCOMPtr_h___
|
|
#include "nsCOMPtr.h"
|
|
#endif
|
|
|
|
class NS_EXPORT nsGetInterface : public nsCOMPtr_helper
|
|
{
|
|
public:
|
|
nsGetInterface( nsISupports* aSource, nsresult* error )
|
|
: mSource(aSource),
|
|
mErrorPtr(error)
|
|
{
|
|
// nothing else to do here
|
|
}
|
|
|
|
virtual nsresult operator()( const nsIID&, void** ) const;
|
|
virtual ~nsGetInterface() {};
|
|
|
|
private:
|
|
nsCOMPtr<nsISupports> mSource;
|
|
nsresult* mErrorPtr;
|
|
};
|
|
|
|
inline
|
|
const nsGetInterface
|
|
do_GetInterface( nsISupports* aSource, nsresult* error = 0 )
|
|
{
|
|
return nsGetInterface(aSource, error);
|
|
}
|
|
|
|
%}
|
|
|