| 1 | /* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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| 2 | *
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| 3 | * ***** BEGIN LICENSE BLOCK *****
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| 4 | * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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| 5 | *
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| 6 | * The contents of this file are subject to the Mozilla Public License Version
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| 7 | * 1.1 (the "License"); you may not use this file except in compliance with
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| 8 | * the License. You may obtain a copy of the License at
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| 9 | * http://www.mozilla.org/MPL/
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| 10 | *
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| 11 | * Software distributed under the License is distributed on an "AS IS" basis,
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| 12 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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| 13 | * for the specific language governing rights and limitations under the
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| 14 | * License.
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| 15 | *
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| 16 | * The Original Code is the Mozilla browser.
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| 17 | *
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| 18 | * The Initial Developer of the Original Code is
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| 19 | * Netscape Communications, Inc.
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| 20 | * Portions created by the Initial Developer are Copyright (C) 1999
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| 21 | * the Initial Developer. All Rights Reserved.
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| 22 | *
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| 23 | * Contributor(s):
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| 24 | * Travis Bogard <travis@netscape.com>
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| 25 | *
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| 26 | * Alternatively, the contents of this file may be used under the terms of
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| 27 | * either of the GNU General Public License Version 2 or later (the "GPL"),
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| 28 | * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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| 29 | * in which case the provisions of the GPL or the LGPL are applicable instead
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| 30 | * of those above. If you wish to allow use of your version of this file only
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| 31 | * under the terms of either the GPL or the LGPL, and not to allow others to
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| 32 | * use your version of this file under the terms of the MPL, indicate your
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| 33 | * decision by deleting the provisions above and replace them with the notice
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| 34 | * and other provisions required by the GPL or the LGPL. If you do not delete
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| 35 | * the provisions above, a recipient may use your version of this file under
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| 36 | * the terms of any one of the MPL, the GPL or the LGPL.
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| 37 | *
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| 38 | * ***** END LICENSE BLOCK ***** */
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| 39 |
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| 40 | #include "nsISupports.idl"
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| 41 |
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| 42 | /**
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| 43 | * The nsIInterfaceRequestor interface defines a generic interface for
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| 44 | * requesting interfaces that a given object might provide access to.
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| 45 | * This is very similar to QueryInterface found in nsISupports.
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| 46 | * The main difference is that interfaces returned from GetInterface()
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| 47 | * are not required to provide a way back to the object implementing this
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| 48 | * interface. The semantics of QI() dictate that given an interface A that
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| 49 | * you QI() on to get to interface B, you must be able to QI on B to get back
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| 50 | * to A. This interface however allows you to obtain an interface C from A
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| 51 | * that may or most likely will not have the ability to get back to A.
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| 52 | *
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| 53 | * @status FROZEN
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| 54 | */
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| 55 |
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| 56 | [scriptable, uuid(033A1470-8B2A-11d3-AF88-00A024FFC08C)]
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| 57 | interface nsIInterfaceRequestor : nsISupports
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| 58 | {
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| 59 | /**
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| 60 | * Retrieves the specified interface pointer.
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| 61 | *
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| 62 | * @param uuid The IID of the interface being requested.
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| 63 | * @param result [out] The interface pointer to be filled in if
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| 64 | * the interface is accessible.
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| 65 | * @return NS_OK - interface was successfully returned.
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| 66 | * NS_NOINTERFACE - interface not accessible.
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| 67 | * NS_ERROR* - method failure.
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| 68 | */
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| 69 | void getInterface(in nsIIDRef uuid,
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| 70 | [iid_is(uuid),retval] out nsQIResult result);
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| 71 | };
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| 72 |
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