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 "txIXPathContext.h"
8 #include "txNodeSet.h"
9
10 //-------------/
11 //- UnionExpr -/
12 //-------------/
13
14 //-----------------------------/
15 //- Virtual methods from Expr -/
16 //-----------------------------/
17
18 /**
19 * Evaluates this Expr based on the given context node and processor state
20 * @param context the context node for evaluation of this Expr
21 * @param ps the ContextState containing the stack information needed
22 * for evaluation
23 * @return the result of the evaluation
24 **/
25 nsresult
evaluate(txIEvalContext * aContext,txAExprResult ** aResult)26 UnionExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
27 {
28 *aResult = nullptr;
29 RefPtr<txNodeSet> nodes;
30 nsresult rv = aContext->recycler()->getNodeSet(getter_AddRefs(nodes));
31 NS_ENSURE_SUCCESS(rv, rv);
32
33 uint32_t i, len = mExpressions.Length();
34 for (i = 0; i < len; ++i) {
35 RefPtr<txAExprResult> exprResult;
36 rv = mExpressions[i]->evaluate(aContext, getter_AddRefs(exprResult));
37 NS_ENSURE_SUCCESS(rv, rv);
38
39 if (exprResult->getResultType() != txAExprResult::NODESET) {
40 //XXX ErrorReport: report nonnodeset error
41 return NS_ERROR_XSLT_NODESET_EXPECTED;
42 }
43
44 RefPtr<txNodeSet> resultSet, ownedSet;
45 resultSet = static_cast<txNodeSet*>
46 (static_cast<txAExprResult*>(exprResult));
47 exprResult = nullptr;
48 rv = aContext->recycler()->
49 getNonSharedNodeSet(resultSet, getter_AddRefs(ownedSet));
50 NS_ENSURE_SUCCESS(rv, rv);
51
52 rv = nodes->addAndTransfer(ownedSet);
53 NS_ENSURE_SUCCESS(rv, rv);
54 }
55
56 *aResult = nodes;
57 NS_ADDREF(*aResult);
58
59 return NS_OK;
60 } //-- evaluate
61
62 Expr::ExprType
getType()63 UnionExpr::getType()
64 {
65 return UNION_EXPR;
66 }
67
TX_IMPL_EXPR_STUBS_LIST(UnionExpr,NODESET_RESULT,mExpressions)68 TX_IMPL_EXPR_STUBS_LIST(UnionExpr, NODESET_RESULT, mExpressions)
69
70 bool
71 UnionExpr::isSensitiveTo(ContextSensitivity aContext)
72 {
73 uint32_t i, len = mExpressions.Length();
74 for (i = 0; i < len; ++i) {
75 if (mExpressions[i]->isSensitiveTo(aContext)) {
76 return true;
77 }
78 }
79
80 return false;
81 }
82
83 #ifdef TX_TO_STRING
84 void
toString(nsAString & dest)85 UnionExpr::toString(nsAString& dest)
86 {
87 uint32_t i;
88 for (i = 0; i < mExpressions.Length(); ++i) {
89 if (i > 0)
90 dest.AppendLiteral(" | ");
91 mExpressions[i]->toString(dest);
92 }
93 }
94 #endif
95