1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/xslt/xpath/txFilterExpr.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,94 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "txExpr.h"
1.10 +#include "txNodeSet.h"
1.11 +#include "txIXPathContext.h"
1.12 +
1.13 +//-- Implementation of FilterExpr --/
1.14 +
1.15 + //-----------------------------/
1.16 + //- Virtual methods from Expr -/
1.17 +//-----------------------------/
1.18 +
1.19 +/**
1.20 + * Evaluates this Expr based on the given context node and processor state
1.21 + * @param context the context node for evaluation of this Expr
1.22 + * @param ps the ProcessorState containing the stack information needed
1.23 + * for evaluation
1.24 + * @return the result of the evaluation
1.25 + * @see Expr
1.26 +**/
1.27 +nsresult
1.28 +FilterExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
1.29 +{
1.30 + *aResult = nullptr;
1.31 +
1.32 + nsRefPtr<txAExprResult> exprRes;
1.33 + nsresult rv = expr->evaluate(aContext, getter_AddRefs(exprRes));
1.34 + NS_ENSURE_SUCCESS(rv, rv);
1.35 +
1.36 + NS_ENSURE_TRUE(exprRes->getResultType() == txAExprResult::NODESET,
1.37 + NS_ERROR_XSLT_NODESET_EXPECTED);
1.38 +
1.39 + nsRefPtr<txNodeSet> nodes =
1.40 + static_cast<txNodeSet*>(static_cast<txAExprResult*>(exprRes));
1.41 + // null out exprRes so that we can test for shared-ness
1.42 + exprRes = nullptr;
1.43 +
1.44 + nsRefPtr<txNodeSet> nonShared;
1.45 + rv = aContext->recycler()->getNonSharedNodeSet(nodes,
1.46 + getter_AddRefs(nonShared));
1.47 + NS_ENSURE_SUCCESS(rv, rv);
1.48 +
1.49 + rv = evaluatePredicates(nonShared, aContext);
1.50 + NS_ENSURE_SUCCESS(rv, rv);
1.51 +
1.52 + *aResult = nonShared;
1.53 + NS_ADDREF(*aResult);
1.54 +
1.55 + return NS_OK;
1.56 +} //-- evaluate
1.57 +
1.58 +TX_IMPL_EXPR_STUBS_BASE(FilterExpr, NODESET_RESULT)
1.59 +
1.60 +Expr*
1.61 +FilterExpr::getSubExprAt(uint32_t aPos)
1.62 +{
1.63 + if (aPos == 0) {
1.64 + return expr;
1.65 + }
1.66 + return PredicateList::getSubExprAt(aPos - 1);
1.67 +}
1.68 +
1.69 +void
1.70 +FilterExpr::setSubExprAt(uint32_t aPos, Expr* aExpr)
1.71 +{
1.72 + if (aPos == 0) {
1.73 + expr.forget();
1.74 + expr = aExpr;
1.75 + }
1.76 + else {
1.77 + PredicateList::setSubExprAt(aPos - 1, aExpr);
1.78 + }
1.79 +}
1.80 +
1.81 +bool
1.82 +FilterExpr::isSensitiveTo(ContextSensitivity aContext)
1.83 +{
1.84 + return expr->isSensitiveTo(aContext) ||
1.85 + PredicateList::isSensitiveTo(aContext);
1.86 +}
1.87 +
1.88 +#ifdef TX_TO_STRING
1.89 +void
1.90 +FilterExpr::toString(nsAString& str)
1.91 +{
1.92 + if ( expr ) expr->toString(str);
1.93 + else str.AppendLiteral("null");
1.94 + PredicateList::toString(str);
1.95 +}
1.96 +#endif
1.97 +
