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38 :
39 : #include "txExpr.h"
40 : #include "txExprResult.h"
41 : #include "txSingleNodeContext.h"
42 :
43 0 : txPredicatedNodeTest::txPredicatedNodeTest(txNodeTest* aNodeTest,
44 : Expr* aPredicate)
45 : : mNodeTest(aNodeTest),
46 0 : mPredicate(aPredicate)
47 : {
48 0 : NS_ASSERTION(!mPredicate->isSensitiveTo(Expr::NODESET_CONTEXT),
49 : "predicate must not be context-nodeset-sensitive");
50 0 : }
51 :
52 : bool
53 0 : txPredicatedNodeTest::matches(const txXPathNode& aNode,
54 : txIMatchContext* aContext)
55 : {
56 0 : if (!mNodeTest->matches(aNode, aContext)) {
57 0 : return false;
58 : }
59 :
60 0 : txSingleNodeContext context(aNode, aContext);
61 0 : nsRefPtr<txAExprResult> res;
62 0 : nsresult rv = mPredicate->evaluate(&context, getter_AddRefs(res));
63 0 : NS_ENSURE_SUCCESS(rv, false);
64 :
65 0 : return res->booleanValue();
66 : }
67 :
68 : double
69 0 : txPredicatedNodeTest::getDefaultPriority()
70 : {
71 0 : return 0.5;
72 : }
73 :
74 : bool
75 0 : txPredicatedNodeTest::isSensitiveTo(Expr::ContextSensitivity aContext)
76 : {
77 0 : return mNodeTest->isSensitiveTo(aContext) ||
78 0 : mPredicate->isSensitiveTo(aContext);
79 : }
80 :
81 : #ifdef TX_TO_STRING
82 : void
83 0 : txPredicatedNodeTest::toString(nsAString& aDest)
84 : {
85 0 : mNodeTest->toString(aDest);
86 0 : aDest.Append(PRUnichar('['));
87 0 : mPredicate->toString(aDest);
88 0 : aDest.Append(PRUnichar(']'));
89 0 : }
90 : #endif
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