Back to index

lightning-sunbird  0.9+nobinonly
RootExpr.cpp
Go to the documentation of this file.
00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is TransforMiiX XSLT processor code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * The MITRE Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1999
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Keith Visco <kvisco@ziplink.net> (Original Author)
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #include "Expr.h"
00040 #include "txNodeSet.h"
00041 #include "txIXPathContext.h"
00042 
00050 nsresult
00051 RootExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
00052 {
00053     const txXPathNode& context = aContext->getContextNode();
00054     nsAutoPtr<txXPathNode> document(txXPathNodeUtils::getDocument(context));
00055     if (!document) {
00056         nsRefPtr<txNodeSet> nodes;
00057         aContext->recycler()->getNodeSet(getter_AddRefs(nodes));
00058         if (!nodes) {
00059             return NS_ERROR_OUT_OF_MEMORY;
00060         }
00061 
00062         NS_ADDREF(*aResult = nodes);
00063 
00064         return NS_OK;
00065     }
00066 
00067     return aContext->recycler()->getNodeSet(*document, aResult);
00068 } //-- evaluate
00069 
00070 #ifdef TX_TO_STRING
00071 void
00072 RootExpr::toString(nsAString& dest)
00073 {
00074     if (mSerialize)
00075         dest.Append(PRUnichar('/'));
00076 }
00077 #endif