1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/xpcom/base/nsIInterfaceRequestor.idl Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,36 @@
1.4 +/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + *
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "nsISupports.idl"
1.11 +
1.12 +/**
1.13 + * The nsIInterfaceRequestor interface defines a generic interface for
1.14 + * requesting interfaces that a given object might provide access to.
1.15 + * This is very similar to QueryInterface found in nsISupports.
1.16 + * The main difference is that interfaces returned from GetInterface()
1.17 + * are not required to provide a way back to the object implementing this
1.18 + * interface. The semantics of QI() dictate that given an interface A that
1.19 + * you QI() on to get to interface B, you must be able to QI on B to get back
1.20 + * to A. This interface however allows you to obtain an interface C from A
1.21 + * that may or most likely will not have the ability to get back to A.
1.22 + */
1.23 +
1.24 +[scriptable, uuid(033A1470-8B2A-11d3-AF88-00A024FFC08C)]
1.25 +interface nsIInterfaceRequestor : nsISupports
1.26 +{
1.27 + /**
1.28 + * Retrieves the specified interface pointer.
1.29 + *
1.30 + * @param uuid The IID of the interface being requested.
1.31 + * @param result [out] The interface pointer to be filled in if
1.32 + * the interface is accessible.
1.33 + * @throws NS_NOINTERFACE - interface not accessible.
1.34 + * @throws NS_ERROR* - method failure.
1.35 + */
1.36 + void getInterface(in nsIIDRef uuid,
1.37 + [iid_is(uuid),retval] out nsQIResult result);
1.38 +};
1.39 +
