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125 lines
4.8 KiB
Plaintext
125 lines
4.8 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: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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 XPCOM Array interface.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corp.
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Alec Flett <alecf@netscape.com>
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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 MPL, 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 MPL, 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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interface nsISimpleEnumerator;
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/**
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* nsIArray
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*
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* An indexed collection of elements. Provides basic functionality for
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* retrieving elements at a specific position, searching for
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* elements. Indexes are zero-based, such that the last element in the
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* array is stored at the index length-1.
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*
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* For an array which can be modified, see nsIMutableArray below.
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*
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* Neither interface makes any attempt to protect the individual
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* elements from modification. The convention is that the elements of
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* the array should not be modified. Documentation within a specific
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* interface should describe variations from this convention.
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*
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* It is also convention that if an interface provides access to an
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* nsIArray, that the array should not be QueryInterfaced to an
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* nsIMutableArray for modification. If the interface in question had
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* intended the array to be modified, it would have returned an
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* nsIMutableArray!
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*
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* null is a valid entry in the array, and as such any nsISupports
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* parameters may be null, except where noted.
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*/
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[scriptable, uuid(114744d9-c369-456e-b55a-52fe52880d2d)]
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interface nsIArray : nsISupports
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{
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/**
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* length
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*
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* number of elements in the array.
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*/
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readonly attribute unsigned long length;
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/**
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* queryElementAt()
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*
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* Retrieve a specific element of the array, and QueryInterface it
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* to the specified interface. null is a valid result for
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* this method, but exceptions are thrown in other circumstances
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*
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* @param index position of element
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* @param uuid the IID of the requested interface
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* @param result the object, QI'd to the requested interface
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*
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* @throws NS_ERROR_NO_INTERFACE when an entry exists at the
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* specified index, but the requested interface is not
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* available.
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* @throws NS_ERROR_ILLEGAL_VALUE when index > length-1
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*
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*/
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void queryElementAt(in unsigned long index,
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in nsIIDRef uuid,
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[iid_is(uuid), retval] out nsQIResult result);
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/**
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* indexOf()
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*
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* Get the position of a specific element. Note that since null is
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* a valid input, exceptions are used to indicate that an element
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* is not found.
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*
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* @param startIndex The initial element to search in the array
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* To start at the beginning, use 0 as the
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* startIndex
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* @param element The element you are looking for
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* @returns a number >= startIndex which is the position of the
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* element in the array.
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* @throws NS_ERROR_FAILURE if the element was not in the array.
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*/
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unsigned long indexOf(in unsigned long startIndex,
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in nsISupports element);
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/**
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* enumerate the array
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*
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* @returns a new enumerator positioned at the start of the array
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* @throws NS_ERROR_FAILURE if the array is empty (to make it easy
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* to detect errors), or NS_ERROR_OUT_OF_MEMORY if out of memory.
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*/
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nsISimpleEnumerator enumerate();
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};
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