gecko-dev/xpcom/ds/nsIMutableArray.idl

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 XPCOM Array interface.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Alec Flett <alecf@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 "nsIArray.idl"
/**
* nsIMutableArray
* A separate set of methods that will act on the array. Consumers of
* nsIArray should not QueryInterface to nsIMutableArray unless they
* own the array.
*
* As above, it is legal to add null elements to the array. Note also
* that null elements can be created as a side effect of
* insertElementAt(). Conversely, if insertElementAt() is never used,
* and null elements are never explicitly added to the array, then it
* is guaranteed that queryElementAt() will never return a null value.
*
* Any of these methods may throw NS_ERROR_OUT_OF_MEMORY when the
* array must grow to complete the call, but the allocation fails.
*/
[scriptable, uuid(af059da0-c85b-40ec-af07-ae4bfdc192cc)]
interface nsIMutableArray : nsIArray
{
/**
* appendElement()
*
* Append an element at the end of the array.
*
* @param element The element to append.
* @param weak Whether or not to store the element using a weak
* reference.
* @throws NS_ERROR_FAILURE when a weak reference is requested,
* but the element does not support
* nsIWeakReference.
*/
void appendElement(in nsISupports element, in boolean weak);
/**
* removeElementAt()
*
* Remove an element at a specific position, moving all elements
* stored at a higher position down one.
* To remove a specific element, use indexOf() to find the index
* first, then call removeElementAt().
*
* @param index the position of the item
*
*/
void removeElementAt(in unsigned long index);
/**
* insertElementAt()
*
* Insert an element at the given position, moving the element
* currently located in that position, and all elements in higher
* position, up by one.
*
* @param element The element to insert
* @param index The position in the array:
* If the position is lower than the current length
* of the array, the elements at that position and
* onwards are bumped one position up.
* If the position is equal to the current length
* of the array, the new element is appended.
* An index lower than 0 or higher than the current
* length of the array is invalid and will be ignored.
*
* @throws NS_ERROR_FAILURE when a weak reference is requested,
* but the element does not support
* nsIWeakReference.
*/
void insertElementAt(in nsISupports element, in unsigned long index,
in boolean weak);
/**
* replaceElementAt()
*
* Replace the element at the given position.
*
* @param element The new element to insert
* @param index The position in the array
* If the position is lower than the current length
* of the array, an existing element will be replaced.
* If the position is equal to the current length
* of the array, the new element is appended.
* If the position is higher than the current length
* of the array, empty elements are appended followed
* by the new element at the specified position.
* An index lower than 0 is invalid and will be ignored.
*
* @param weak Whether or not to store the new element using a weak
* reference.
*
* @throws NS_ERROR_FAILURE when a weak reference is requested,
* but the element does not support
* nsIWeakReference.
*/
void replaceElementAt(in nsISupports element, in unsigned long index,
in boolean weak);
/**
* clear()
*
* clear the entire array, releasing all stored objects
*/
void clear();
};