/* -*- 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 mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Peter Van der Beken.
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Peter Van der Beken <peterv@propagandism.org>
 *
 *
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 * 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
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 * ***** END LICENSE BLOCK ***** */

#include "txNodeSetAdaptor.h"
#include "txXPathTreeWalker.h"

txNodeSetAdaptor::txNodeSetAdaptor()
    : mWritable(PR_TRUE)
{
}

txNodeSetAdaptor::txNodeSetAdaptor(txNodeSet *aNodeSet)
    : mNodeSet(aNodeSet),
      mWritable(PR_FALSE)
{
    NS_ASSERTION(aNodeSet,
                 "Don't create an adaptor if you don't have a txNodeSet");
}

NS_IMPL_ISUPPORTS1(txNodeSetAdaptor, txINodeSet)

nsresult
txNodeSetAdaptor::Init()
{
    if (!mNodeSet) {
        mNodeSet = new txNodeSet(nsnull);
    }

    return mNodeSet ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}

NS_IMETHODIMP
txNodeSetAdaptor::Item(PRUint32 aIndex, nsIDOMNode **aResult)
{
    *aResult = nsnull;

    if (aIndex > (PRUint32)mNodeSet->size()) {
        return NS_ERROR_ILLEGAL_VALUE;
    }

    return txXPathNativeNode::getNode(mNodeSet->get(aIndex), aResult);
}

NS_IMETHODIMP
txNodeSetAdaptor::ItemAsNumber(PRUint32 aIndex, double *aResult)
{
    if (aIndex > (PRUint32)mNodeSet->size()) {
        return NS_ERROR_ILLEGAL_VALUE;
    }

    nsAutoString result;
    txXPathNodeUtils::appendNodeValue(mNodeSet->get(aIndex), result);

    *aResult = Double::toDouble(result);

    return NS_OK;
}

NS_IMETHODIMP
txNodeSetAdaptor::ItemAsString(PRUint32 aIndex, nsAString &aResult)
{
    if (aIndex > (PRUint32)mNodeSet->size()) {
        return NS_ERROR_ILLEGAL_VALUE;
    }

    txXPathNodeUtils::appendNodeValue(mNodeSet->get(aIndex), aResult);

    return NS_OK;
}

NS_IMETHODIMP
txNodeSetAdaptor::GetLength(PRUint32 *aLength)
{
    *aLength = (PRUint32)mNodeSet->size();

    return NS_OK;
}

NS_IMETHODIMP
txNodeSetAdaptor::Add(nsIDOMNode *aNode)
{
    NS_ENSURE_TRUE(mWritable, NS_ERROR_FAILURE);

    nsAutoPtr<txXPathNode> node(txXPathNativeNode::createXPathNode(aNode,
                                                                   PR_TRUE));

    return node ? mNodeSet->add(*node) : NS_ERROR_OUT_OF_MEMORY;
}

txAExprResult*
txNodeSetAdaptor::GetTxNodeSet()
{
    return mNodeSet;
}
