mirror of
https://github.com/classilla/tenfourfox.git
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70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "txExpr.h"
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#include "nsIAtom.h"
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#include "txNodeSet.h"
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#include "nsGkAtoms.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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int32_t 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 == nsGkAtoms::_empty)
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mPrefix = 0;
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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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nsresult
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VariableRefExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
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{
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nsresult rv = aContext->getVariable(mNamespace, mLocalName, *aResult);
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if (NS_FAILED(rv)) {
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// XXX report error, undefined variable
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return rv;
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}
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return NS_OK;
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}
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TX_IMPL_EXPR_STUBS_0(VariableRefExpr, ANY_RESULT)
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bool
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VariableRefExpr::isSensitiveTo(ContextSensitivity aContext)
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{
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return !!(aContext & VARIABLES_CONTEXT);
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}
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#ifdef TX_TO_STRING
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void
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VariableRefExpr::toString(nsAString& aDest)
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{
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aDest.Append(char16_t('$'));
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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(char16_t(':'));
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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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}
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#endif
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