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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsISupports.idl"
#include "nsIRDFDataSource.idl"
#include "nsIRDFResource.idl"
#include "nsIRDFNode.idl"
#include "nsISimpleEnumerator.idl"
// A wrapper for manipulating RDF containers
[scriptable, uuid(D4214E90-FB94-11D2-BDD8-00104BDE6048)]
interface nsIRDFContainer : nsISupports {
readonly attribute nsIRDFDataSource DataSource;
readonly attribute nsIRDFResource Resource;
/**
* Initialize the container wrapper to the specified resource
* using the specified datasource for context.
*/
void Init(in nsIRDFDataSource aDataSource, in nsIRDFResource aContainer);
/**
* Return the number of elements in the container. Note that this
* may not always be accurate due to aggregation.
*/
long GetCount();
/**
* Return an enumerator that can be used to enumerate the contents
* of the container in ascending order.
*/
nsISimpleEnumerator GetElements();
/**
* Append an element to the container, assigning it the next
* available ordinal.
*/
void AppendElement(in nsIRDFNode aElement);
/**
* Remove the first occurence of the specified element from the
* container. If aRenumber is 'true', then the underlying RDF graph
* will be 're-numbered' to account for the removal.
*/
void RemoveElement(in nsIRDFNode aElement, in boolean aRenumber);
/**
* Insert aElement at the specified index. If aRenumber is 'true', then
* the underlying RDF graph will be 're-numbered' to accomodate the new
* element.
*/
void InsertElementAt(in nsIRDFNode aElement, in long aIndex, in boolean aRenumber);
/**
* Remove the element at the specified index. If aRenumber is 'true', then
* the underlying RDF graph will be 're-numbered' to account for the
* removal.
*
* @return the element that was removed.
*/
nsIRDFNode RemoveElementAt(in long aIndex, in boolean aRenumber);
/**
* Determine the index of an element in the container.
*
* @return The index of the specified element in the container. If
* the element is not contained in the container, this function
* returns '-1'.
*/
long IndexOf(in nsIRDFNode aElement);
};
%{C++
nsresult
NS_NewRDFContainer(nsIRDFContainer** aResult);
nsresult
NS_NewRDFContainer(nsIRDFDataSource* aDataSource,
nsIRDFResource* aResource,
nsIRDFContainer** aResult);
/**
* Create a cursor on a container that enumerates its contents in
* order
*/
nsresult
NS_NewContainerEnumerator(nsIRDFDataSource* aDataSource,
nsIRDFResource* aContainer,
nsISimpleEnumerator** aResult);
%}
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