forked from mirrors/gecko-dev
993c03acb1
Differential Revision: https://phabricator.services.mozilla.com/D31769 --HG-- extra : moz-landing-system : lando
92 lines
3.4 KiB
Text
92 lines
3.4 KiB
Text
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsIArrayExtensions.idl"
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/**
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* nsIMutableArray
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* A separate set of methods that will act on the array. Consumers of
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* nsIArray should not QueryInterface to nsIMutableArray unless they
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* own the array.
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*
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* As above, it is legal to add null elements to the array. Note also
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* that null elements can be created as a side effect of
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* insertElementAt(). Conversely, if insertElementAt() is never used,
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* and null elements are never explicitly added to the array, then it
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* is guaranteed that queryElementAt() will never return a null value.
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*
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* Any of these methods may throw NS_ERROR_OUT_OF_MEMORY when the
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* array must grow to complete the call, but the allocation fails.
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*/
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[scriptable, builtinclass, uuid(af059da0-c85b-40ec-af07-ae4bfdc192cc)]
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interface nsIMutableArray : nsIArrayExtensions
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{
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/**
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* appendElement()
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*
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* Append an element at the end of the array.
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*
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* @param element The element to append.
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*/
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void appendElement(in nsISupports element);
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/**
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* removeElementAt()
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*
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* Remove an element at a specific position, moving all elements
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* stored at a higher position down one.
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* To remove a specific element, use indexOf() to find the index
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* first, then call removeElementAt().
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*
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* @param index the position of the item
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*
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*/
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void removeElementAt(in unsigned long index);
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/**
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* insertElementAt()
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*
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* Insert an element at the given position, moving the element
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* currently located in that position, and all elements in higher
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* position, up by one.
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*
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* @param element The element to insert
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* @param index The position in the array:
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* If the position is lower than the current length
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* of the array, the elements at that position and
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* onwards are bumped one position up.
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* If the position is equal to the current length
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* of the array, the new element is appended.
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* An index lower than 0 or higher than the current
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* length of the array is invalid and will be ignored.
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*/
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void insertElementAt(in nsISupports element, in unsigned long index);
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/**
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* replaceElementAt()
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*
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* Replace the element at the given position.
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*
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* @param element The new element to insert
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* @param index The position in the array
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* If the position is lower than the current length
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* of the array, an existing element will be replaced.
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* If the position is equal to the current length
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* of the array, the new element is appended.
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* If the position is higher than the current length
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* of the array, empty elements are appended followed
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* by the new element at the specified position.
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* An index lower than 0 is invalid and will be ignored.
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*/
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void replaceElementAt(in nsISupports element, in unsigned long index);
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/**
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* clear()
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*
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* clear the entire array, releasing all stored objects
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*/
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void clear();
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};
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