gecko-dev/dom/interfaces/base/nsIStructuredCloneContainer.idl

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sw=2 et tw=80:
*
* ***** 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 Initial Developer of the Original Code is the Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Justin Lebar <justin.lebar@gmail.com>
*
* 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 "nsISupports.idl"
interface nsIVariant;
interface nsIDocument;
%{C++
struct JSContext;
%}
/**
* This interface acts as a container for an object serialized using the
* structured clone algorithm.
*
* You can copy an object into an nsIStructuredCloneContainer using
* initFromVariant or initFromBase64. It's an error to initialize an
* nsIStructuredCloneContainer more than once.
*
* Once you've initialized the container, you can get a copy of the object it
* stores by calling deserializeToVariant. You can also get a base-64-encoded
* string containing a copy of the container's serialized data, using
* getDataAsBase64.
*/
[scriptable, uuid(400a282d-7157-4ed0-85b4-8bdc2fa634cd)]
interface nsIStructuredCloneContainer : nsISupports
{
/**
* Initialize this structured clone container so it contains a clone of the
* given variant. aData must be backed by a jsval.
*/
[implicit_jscontext]
void initFromVariant(in nsIVariant aData);
/**
* Initialize this structured clone container from a base-64-encoded byte
* stream, stored in aData. aFormatVersion should be the version of the
* structured clone algorithm which was used to generate aData.
*/
[implicit_jscontext]
void initFromBase64(in AString aData,in unsigned long aFormatVersion);
/**
* Deserialize the object this conatiner holds, returning it wrapped as
* an nsIVariant.
*/
[implicit_jscontext]
nsIVariant deserializeToVariant();
/**
* Get this structured clone container's data as a base-64-encoded string.
*/
AString getDataAsBase64();
/**
* Get the size in bytes of this container's serialized data.
*/
readonly attribute unsigned long long serializedNBytes;
/**
* Get the version of the structured clone algorithm which was used to
* generate this container's serialized buffer.
*/
readonly attribute unsigned long formatVersion;
};