nsIInterfaceRequestor.idl
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上传日期:2017-12-03
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PlugIns编程
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Visual C++
- /* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * 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 the Initial Developer are Copyright (C) 1999
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * Travis Bogard <travis@netscape.com>
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
- #include "nsISupports.idl"
- /**
- * The nsIInterfaceRequestor interface defines a generic interface for
- * requesting interfaces that a given object might provide access to.
- * This is very similar to QueryInterface found in nsISupports.
- * The main difference is that interfaces returned from GetInterface()
- * 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.
- *
- * @status FROZEN
- */
- [scriptable, uuid(033A1470-8B2A-11d3-AF88-00A024FFC08C)]
- interface nsIInterfaceRequestor : nsISupports
- {
- /**
- * Retrieves the specified interface pointer.
- *
- * @param uuid The IID of the interface being requested.
- * @param result [out] The interface pointer to be filled in if
- * the interface is accessible.
- * @return NS_OK - interface was successfully returned.
- * NS_NOINTERFACE - interface not accessible.
- * NS_ERROR* - method failure.
- */
- void getInterface(in nsIIDRef uuid,
- [iid_is(uuid),retval] out nsQIResult result);
- };