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