Line data    Source code

       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/. */
       5             : 
       6             : #include "txExpr.h"
       7             : #include "nsIAtom.h"
       8             : #include "txNodeSet.h"
       9             : #include "nsGkAtoms.h"
      10             : #include "txIXPathContext.h"
      11             : 
      12             :   //-------------------/
      13             :  //- VariableRefExpr -/
      14             : //-------------------/
      15             : 
      16             : /**
      17             :  * Creates a VariableRefExpr with the given variable name
      18             : **/
      19           0 : VariableRefExpr::VariableRefExpr(nsIAtom* aPrefix, nsIAtom* aLocalName,
      20           0 :                                  int32_t aNSID)
      21           0 :     : mPrefix(aPrefix), mLocalName(aLocalName), mNamespace(aNSID)
      22             : {
      23           0 :     NS_ASSERTION(mLocalName, "VariableRefExpr without local name?");
      24           0 :     if (mPrefix == nsGkAtoms::_empty)
      25           0 :         mPrefix = nullptr;
      26           0 : }
      27             : 
      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           0 : VariableRefExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
      37             : {
      38           0 :     nsresult rv = aContext->getVariable(mNamespace, mLocalName, *aResult);
      39           0 :     if (NS_FAILED(rv)) {
      40             :       // XXX report error, undefined variable
      41           0 :       return rv;
      42             :     }
      43           0 :     return NS_OK;
      44             : }
      45             : 
      46           0 : TX_IMPL_EXPR_STUBS_0(VariableRefExpr, ANY_RESULT)
      47             : 
      48             : bool
      49           0 : VariableRefExpr::isSensitiveTo(ContextSensitivity aContext)
      50             : {
      51           0 :     return !!(aContext & VARIABLES_CONTEXT);
      52             : }
      53             : 
      54             : #ifdef TX_TO_STRING
      55             : void
      56           0 : VariableRefExpr::toString(nsAString& aDest)
      57             : {
      58           0 :     aDest.Append(char16_t('$'));
      59           0 :     if (mPrefix) {
      60           0 :         nsAutoString prefix;
      61           0 :         mPrefix->ToString(prefix);
      62           0 :         aDest.Append(prefix);
      63           0 :         aDest.Append(char16_t(':'));
      64             :     }
      65           0 :     nsAutoString lname;
      66           0 :     mLocalName->ToString(lname);
      67           0 :     aDest.Append(lname);
      68           0 : }
      69             : #endif