gecko/dom/interfaces/storage/nsIDOMStorage.idl

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/* -*- Mode: IDL; tab-width: 2; 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 mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Jan Bambas <honzab@firemni.cz>
*
* 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 "domstubs.idl"
/**
* Interface for client side storage. See
* http://www.whatwg.org/specs/web-apps/current-work/multipage/structured.html#storage0
* for more information.
*
* A storage object stores an arbitrary set of key-value pairs, which
* may be retrieved, modified and removed as needed. A key may only
* exist once within a storage object, and only one value may be
* associated with a particular key. Keys are stored in a particular
* order with the condition that this order not change by merely changing
* the value associated with a key, but the order may change when a
* key is added or removed.
*/
[scriptable, uuid(43E5EDAD-1E02-42c4-9D99-C3D9DEE22A20)]
interface nsIDOMStorage : nsISupports
{
/**
* The number of keys stored.
*/
readonly attribute unsigned long length;
/**
* Retrieve the name of the key at a particular index.
*
* @param index index of the item to retrieve
* @returns the key at index
* @throws INDEX_SIZE_ERR if there is no key at that index
*/
DOMString key(in unsigned long index);
/**
* Retrieve an item with a given key
*
* @param key key to retrieve
* @returns found data or empty string if the key was not found
*/
DOMString getItem(in DOMString key);
/**
* Assign a value with a key. If the key does not exist already, a new
* key is added associated with that value. If the key already exists,
* then the existing value is replaced with a new value.
*
* @param key key to set
* @param data data to associate with the key
*/
void setItem(in DOMString key, in DOMString data);
/**
* Remove a key and its corresponding value.
*
* @param key key to remove
*/
void removeItem(in DOMString key);
/**
* Clear the content of this storage bound to a domain
* or an origin.
*/
void clear();
};