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lightning-sunbird  0.9+nobinonly
AttributeValueTemplate.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  * 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
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00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00043 #include "Expr.h"
00044 #include "ExprResult.h"
00045 #include "txIXPathContext.h"
00046 
00050 AttributeValueTemplate::AttributeValueTemplate() {}
00051 
00055 AttributeValueTemplate::~AttributeValueTemplate() {
00056     txListIterator iter(&expressions);
00057     while (iter.hasNext()) {
00058         delete (Expr*)iter.next();
00059     }
00060 } //-- ~AttributeValueTemplate
00061 
00065 void AttributeValueTemplate::addExpr(Expr* expr) {
00066     if (expr) expressions.add(expr);
00067 } //-- addExpr
00068 
00076 nsresult
00077 AttributeValueTemplate::evaluate(txIEvalContext* aContext,
00078                                  txAExprResult** aResult)
00079 {
00080     *aResult = nsnull;
00081 
00082     txListIterator iter(&expressions);
00083     nsRefPtr<StringResult> strRes;
00084     nsresult rv = aContext->recycler()->getStringResult(getter_AddRefs(strRes));
00085     NS_ENSURE_SUCCESS(rv, rv);
00086 
00087     while (iter.hasNext()) {
00088         Expr* expr = (Expr*)iter.next();
00089         nsRefPtr<txAExprResult> exprResult;
00090         nsresult rv = expr->evaluate(aContext, getter_AddRefs(exprResult));
00091         NS_ENSURE_SUCCESS(rv, rv);
00092 
00093         exprResult->stringValue(strRes->mValue);
00094     }
00095 
00096     *aResult = strRes;
00097 
00098     NS_ADDREF(*aResult);
00099 
00100     return NS_OK;
00101 } //-- evaluate
00102 
00103 #ifdef TX_TO_STRING
00104 void
00105 AttributeValueTemplate::toString(nsAString& str)
00106 {
00107     txListIterator iter(&expressions);
00108     while (iter.hasNext()) {
00109         str.Append(PRUnichar('{'));
00110         Expr* expr = (Expr*)iter.next();
00111         expr->toString(str);
00112         str.Append(PRUnichar('}'));
00113     }
00114 }
00115 #endif