The Tor Browser: dom/xslt/xpath/txVariableRefExpr.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "txExpr.h"

     7 #include "nsIAtom.h"

     8 #include "txNodeSet.h"

     9 #include "nsGkAtoms.h"

    10 #include "txIXPathContext.h"

    12   //-------------------/

    13  //- VariableRefExpr -/

    14 //-------------------/

    16 /**

    17  * Creates a VariableRefExpr with the given variable name

    18 **/

    19 VariableRefExpr::VariableRefExpr(nsIAtom* aPrefix, nsIAtom* aLocalName,

    20                                  int32_t aNSID)

    21     : mPrefix(aPrefix), mLocalName(aLocalName), mNamespace(aNSID)

    22 {

    23     NS_ASSERTION(mLocalName, "VariableRefExpr without local name?");

    24     if (mPrefix == nsGkAtoms::_empty)

    25         mPrefix = 0;

    26 }

    28 /**

    29  * Evaluates this Expr based on the given context node and processor state

    30  * @param context the context node for evaluation of this Expr

    31  * @param ps the ContextState containing the stack information needed

    32  * for evaluation

    33  * @return the result of the evaluation

    34 **/

    35 nsresult

    36 VariableRefExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)

    37 {

    38     nsresult rv = aContext->getVariable(mNamespace, mLocalName, *aResult);

    39     if (NS_FAILED(rv)) {

    40       // XXX report error, undefined variable

    41       return rv;

    42     }

    43     return NS_OK;

    44 }

    46 TX_IMPL_EXPR_STUBS_0(VariableRefExpr, ANY_RESULT)

    48 bool

    49 VariableRefExpr::isSensitiveTo(ContextSensitivity aContext)

    50 {

    51     return !!(aContext & VARIABLES_CONTEXT);

    52 }

    54 #ifdef TX_TO_STRING

    55 void

    56 VariableRefExpr::toString(nsAString& aDest)

    57 {

    58     aDest.Append(char16_t('$'));

    59     if (mPrefix) {

    60         nsAutoString prefix;

    61         mPrefix->ToString(prefix);

    62         aDest.Append(prefix);

    63         aDest.Append(char16_t(':'));

    64     }

    65     nsAutoString lname;

    66     mLocalName->ToString(lname);

    67     aDest.Append(lname);

    68 }

    69 #endif

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