dom/xslt/xpath/txPredicatedNodeTest.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 "txExpr.h"
   7 #include "txExprResult.h"
   8 #include "txSingleNodeContext.h"
   9
  10 txPredicatedNodeTest::txPredicatedNodeTest(txNodeTest* aNodeTest,
  11                                            Expr* aPredicate)
  12     : mNodeTest(aNodeTest), mPredicate(aPredicate) {
  13   NS_ASSERTION(!mPredicate->isSensitiveTo(Expr::NODESET_CONTEXT),
  14                "predicate must not be context-nodeset-sensitive");
  15 }
  16
  17 nsresult txPredicatedNodeTest::matches(const txXPathNode& aNode,
  18                                        txIMatchContext* aContext,
  19                                        bool& aMatched) {
  20   nsresult rv = mNodeTest->matches(aNode, aContext, aMatched);
  21   NS_ENSURE_SUCCESS(rv, rv);
  22
  23   if (!aMatched) {
  24     return NS_OK;
  25   }
  26
  27   txSingleNodeContext context(aNode, aContext);
  28   RefPtr<txAExprResult> res;
  29   rv = mPredicate->evaluate(&context, getter_AddRefs(res));
  30   NS_ENSURE_SUCCESS(rv, rv);
  31
  32   aMatched = res->booleanValue();
  33   return NS_OK;
  34 }
  35
  36 double txPredicatedNodeTest::getDefaultPriority() { return 0.5; }
  37
  38 bool txPredicatedNodeTest::isSensitiveTo(Expr::ContextSensitivity aContext) {
  39   return mNodeTest->isSensitiveTo(aContext) ||
  40          mPredicate->isSensitiveTo(aContext);
  41 }
  42
  43 #ifdef TX_TO_STRING
  44 void txPredicatedNodeTest::toString(nsAString& aDest) {
  45   mNodeTest->toString(aDest);
  46   aDest.Append(char16_t('['));
  47   mPredicate->toString(aDest);
  48   aDest.Append(char16_t(']'));
  49 }
  50 #endif