7ed1750027
b=157142 r=Pike sr=peterv git-svn-id: svn://10.0.0.236/trunk@136648 18797224-902f-48f8-a5cc-f745e15eee43
93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is TransforMiiX XSLT processor.
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*
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* The Initial Developer of the Original Code is The MITRE Corporation.
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* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
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*
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* Portions created by Keith Visco as a Non MITRE employee,
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* (C) 1999 Keith Visco. All Rights Reserved.
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*
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* Contributor(s):
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* Keith Visco, kvisco@ziplink.net
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* -- original author.
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*
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*/
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#include "Expr.h"
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#include "NodeSet.h"
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#include "txAtoms.h"
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#include "txIXPathContext.h"
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//-------------------/
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//- VariableRefExpr -/
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//-------------------/
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/**
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* Creates a VariableRefExpr with the given variable name
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**/
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VariableRefExpr::VariableRefExpr(nsIAtom* aPrefix, nsIAtom* aLocalName,
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PRInt32 aNSID)
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: mPrefix(aPrefix), mLocalName(aLocalName), mNamespace(aNSID)
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{
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NS_ASSERTION(mLocalName, "VariableRefExpr without local name?");
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if (mPrefix == txXMLAtoms::_empty)
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mPrefix = 0;
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}
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/*
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* Release the local name atom
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*/
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VariableRefExpr::~VariableRefExpr()
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{
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}
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/**
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* Evaluates this Expr based on the given context node and processor state
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* @param context the context node for evaluation of this Expr
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* @param ps the ContextState containing the stack information needed
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* for evaluation
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* @return the result of the evaluation
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**/
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ExprResult* VariableRefExpr::evaluate(txIEvalContext* aContext)
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{
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ExprResult* exprResult = 0;
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nsresult rv = aContext->getVariable(mNamespace, mLocalName, exprResult);
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if (NS_FAILED(rv)) {
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// XXX report error, undefined variable
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return new StringResult(NS_LITERAL_STRING("error"));
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}
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return exprResult->clone();
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}
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/**
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* Returns the String representation of this Expr.
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* @param dest the String to use when creating the String
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* representation. The String representation will be appended to
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* any data in the destination String, to allow cascading calls to
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* other #toString() methods for Expressions.
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* @return the String representation of this Expr.
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**/
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void VariableRefExpr::toString(nsAString& aDest)
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{
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aDest.Append(PRUnichar('$'));
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if (mPrefix) {
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nsAutoString prefix;
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mPrefix->ToString(prefix);
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aDest.Append(prefix);
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aDest.Append(PRUnichar(':'));
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}
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nsAutoString lname;
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mLocalName->ToString(lname);
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aDest.Append(lname);
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} //-- toString
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