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lightning-sunbird  0.9+nobinonly
GenerateIdFunctionCall.cpp
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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  * Keith Visco.
00019  * Portions created by the Initial Developer are Copyright (C) 1999
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
00026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #include "ExprResult.h"
00039 #include "txAtoms.h"
00040 #include "txIXPathContext.h"
00041 #include "txNodeSet.h"
00042 #include "XSLTFunctions.h"
00043 
00044 /*
00045   Implementation of XSLT 1.0 extension function: generate-id
00046 */
00047 
00051 GenerateIdFunctionCall::GenerateIdFunctionCall()
00052 {
00053 }
00054 
00063 nsresult
00064 GenerateIdFunctionCall::evaluate(txIEvalContext* aContext,
00065                                  txAExprResult** aResult)
00066 {
00067     *aResult = nsnull;
00068     if (!requireParams(0, 1, aContext))
00069         return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
00070 
00071     nsresult rv = NS_OK;
00072     if (params.getLength() != 1) {
00073         StringResult* strRes;
00074         rv = aContext->recycler()->getStringResult(&strRes);
00075         NS_ENSURE_SUCCESS(rv, rv);
00076 
00077         txXPathNodeUtils::getXSLTId(aContext->getContextNode(),
00078                                     strRes->mValue);
00079 
00080         *aResult = strRes;
00081  
00082         return NS_OK;
00083     }
00084 
00085     txListIterator iter(&params);
00086     nsRefPtr<txNodeSet> nodes;
00087     rv = evaluateToNodeSet(NS_STATIC_CAST(Expr*, iter.next()), aContext,
00088                            getter_AddRefs(nodes));
00089     NS_ENSURE_SUCCESS(rv, rv);
00090 
00091     if (nodes->isEmpty()) {
00092         aContext->recycler()->getEmptyStringResult(aResult);
00093 
00094         return NS_OK;
00095     }
00096     
00097     StringResult* strRes;
00098     rv = aContext->recycler()->getStringResult(&strRes);
00099     NS_ENSURE_SUCCESS(rv, rv);
00100 
00101     txXPathNodeUtils::getXSLTId(nodes->get(0), strRes->mValue);
00102 
00103     *aResult = strRes;
00104  
00105     return NS_OK;
00106 }
00107 
00108 #ifdef TX_TO_STRING
00109 nsresult
00110 GenerateIdFunctionCall::getNameAtom(nsIAtom** aAtom)
00111 {
00112     *aAtom = txXSLTAtoms::generateId;
00113     NS_ADDREF(*aAtom);
00114     return NS_OK;
00115 }
00116 #endif