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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "txExpr.h"
#include "nsAtom.h"
#include "txNodeSet.h"
#include "nsGkAtoms.h"
#include "txIXPathContext.h"
//-------------------/
//- VariableRefExpr -/
//-------------------/
/**
* Creates a VariableRefExpr with the given variable name
**/
VariableRefExpr::VariableRefExpr(nsAtom* aPrefix, nsAtom* aLocalName,
int32_t aNSID)
: mPrefix(aPrefix), mLocalName(aLocalName), mNamespace(aNSID) {
NS_ASSERTION(mLocalName, "VariableRefExpr without local name?");
if (mPrefix == nsGkAtoms::_empty) mPrefix = nullptr;
}
/**
* Evaluates this Expr based on the given context node and processor state
* @param context the context node for evaluation of this Expr
* @param ps the ContextState containing the stack information needed
* for evaluation
* @return the result of the evaluation
**/
nsresult VariableRefExpr::evaluate(txIEvalContext* aContext,
txAExprResult** aResult) {
nsresult rv = aContext->getVariable(mNamespace, mLocalName, *aResult);
if (NS_FAILED(rv)) {
// XXX report error, undefined variable
return rv;
}
return NS_OK;
}
TX_IMPL_EXPR_STUBS_0(VariableRefExpr, ANY_RESULT)
bool VariableRefExpr::isSensitiveTo(ContextSensitivity aContext) {
return !!(aContext & VARIABLES_CONTEXT);
}
#ifdef TX_TO_STRING
void VariableRefExpr::toString(nsAString& aDest) {
aDest.Append(char16_t('$'));
if (mPrefix) {
nsAutoString prefix;
mPrefix->ToString(prefix);
aDest.Append(prefix);
aDest.Append(char16_t(':'));
}
nsAutoString lname;
mLocalName->ToString(lname);
aDest.Append(lname);
}
#endif