dom/xslt/xpath/txNamedAttributeStep.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   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 "nsAtom.h"
   7 #include "txIXPathContext.h"
   8 #include "txNodeSet.h"
   9 #include "txExpr.h"
  10 #include "txXPathTreeWalker.h"
  11
  12 txNamedAttributeStep::txNamedAttributeStep(int32_t aNsID, nsAtom* aPrefix,
  13                                            nsAtom* aLocalName)
  14     : mNamespace(aNsID), mPrefix(aPrefix), mLocalName(aLocalName) {}
  15
  16 nsresult txNamedAttributeStep::evaluate(txIEvalContext* aContext,
  17                                         txAExprResult** aResult) {
  18   *aResult = nullptr;
  19
  20   RefPtr<txNodeSet> nodes;
  21   nsresult rv = aContext->recycler()->getNodeSet(getter_AddRefs(nodes));
  22   NS_ENSURE_SUCCESS(rv, rv);
  23
  24   txXPathTreeWalker walker(aContext->getContextNode());
  25   if (walker.moveToNamedAttribute(mLocalName, mNamespace)) {
  26     rv = nodes->append(walker.getCurrentPosition());
  27     NS_ENSURE_SUCCESS(rv, rv);
  28   }
  29   NS_ADDREF(*aResult = nodes);
  30
  31   return NS_OK;
  32 }
  33
  34 TX_IMPL_EXPR_STUBS_0(txNamedAttributeStep, NODESET_RESULT)
  35
  36 bool txNamedAttributeStep::isSensitiveTo(ContextSensitivity aContext) {
  37   return !!(aContext & NODE_CONTEXT);
  38 }
  39
  40 #ifdef TX_TO_STRING
  41 void txNamedAttributeStep::toString(nsAString& aDest) {
  42   aDest.Append(char16_t('@'));
  43   if (mPrefix) {
  44     nsAutoString prefix;
  45     mPrefix->ToString(prefix);
  46     aDest.Append(prefix);
  47     aDest.Append(char16_t(':'));
  48   }
  49   nsAutoString localName;
  50   mLocalName->ToString(localName);
  51   aDest.Append(localName);
  52 }
  53 #endif