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82 lines
3.4 KiB
Plaintext
82 lines
3.4 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsISupports.idl"
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/**
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* Used to enumerate over elements defined by its implementor.
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* Although hasMoreElements() can be called independently of getNext(),
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* getNext() must be pre-ceeded by a call to hasMoreElements(). There is
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* no way to "reset" an enumerator, once you obtain one.
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*
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* @status FROZEN
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* @version 1.0
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*/
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[scriptable, uuid(D1899240-F9D2-11D2-BDD6-000064657374)]
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interface nsISimpleEnumerator : nsISupports {
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/**
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* Called to determine whether or not the enumerator has
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* any elements that can be returned via getNext(). This method
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* is generally used to determine whether or not to initiate or
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* continue iteration over the enumerator, though it can be
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* called without subsequent getNext() calls. Does not affect
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* internal state of enumerator.
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*
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* @see getNext()
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* @return PR_TRUE if there are remaining elements in the enumerator.
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* PR_FALSE if there are no more elements in the enumerator.
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*/
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boolean hasMoreElements();
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/**
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* Called to retrieve the next element in the enumerator. The "next"
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* element is the first element upon the first call. Must be
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* pre-ceeded by a call to hasMoreElements() which returns PR_TRUE.
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* This method is generally called within a loop to iterate over
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* the elements in the enumerator.
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*
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* @see hasMoreElements()
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* @return NS_OK if the call succeeded in returning a non-null
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* value through the out parameter.
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* NS_ERROR_FAILURE if there are no more elements
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* to enumerate.
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* @return the next element in the enumeration.
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*/
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nsISupports getNext();
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};
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