1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is TransforMiiX XSLT processor code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * The MITRE Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1999
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Keith Visco <kvisco@ziplink.net> (Original Author)
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either the GNU General Public License Version 2 or later (the "GPL"), or
27 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
31 : * use your version of this file under the terms of the MPL, indicate your
32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #include "txExpr.h"
40 : #include "txIXPathContext.h"
41 : #include "txNodeSet.h"
42 :
43 : //-------------/
44 : //- UnionExpr -/
45 : //-------------/
46 :
47 : //-----------------------------/
48 : //- Virtual methods from Expr -/
49 : //-----------------------------/
50 :
51 : /**
52 : * Evaluates this Expr based on the given context node and processor state
53 : * @param context the context node for evaluation of this Expr
54 : * @param ps the ContextState containing the stack information needed
55 : * for evaluation
56 : * @return the result of the evaluation
57 : **/
58 : nsresult
59 0 : UnionExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
60 : {
61 0 : *aResult = nsnull;
62 0 : nsRefPtr<txNodeSet> nodes;
63 0 : nsresult rv = aContext->recycler()->getNodeSet(getter_AddRefs(nodes));
64 0 : NS_ENSURE_SUCCESS(rv, rv);
65 :
66 0 : PRUint32 i, len = mExpressions.Length();
67 0 : for (i = 0; i < len; ++i) {
68 0 : nsRefPtr<txAExprResult> exprResult;
69 0 : rv = mExpressions[i]->evaluate(aContext, getter_AddRefs(exprResult));
70 0 : NS_ENSURE_SUCCESS(rv, rv);
71 :
72 0 : if (exprResult->getResultType() != txAExprResult::NODESET) {
73 : //XXX ErrorReport: report nonnodeset error
74 0 : return NS_ERROR_XSLT_NODESET_EXPECTED;
75 : }
76 :
77 0 : nsRefPtr<txNodeSet> resultSet, ownedSet;
78 : resultSet = static_cast<txNodeSet*>
79 0 : (static_cast<txAExprResult*>(exprResult));
80 0 : exprResult = nsnull;
81 0 : rv = aContext->recycler()->
82 0 : getNonSharedNodeSet(resultSet, getter_AddRefs(ownedSet));
83 0 : NS_ENSURE_SUCCESS(rv, rv);
84 :
85 0 : rv = nodes->addAndTransfer(ownedSet);
86 0 : NS_ENSURE_SUCCESS(rv, rv);
87 : }
88 :
89 0 : *aResult = nodes;
90 0 : NS_ADDREF(*aResult);
91 :
92 0 : return NS_OK;
93 : } //-- evaluate
94 :
95 : Expr::ExprType
96 0 : UnionExpr::getType()
97 : {
98 0 : return UNION_EXPR;
99 : }
100 :
101 0 : TX_IMPL_EXPR_STUBS_LIST(UnionExpr, NODESET_RESULT, mExpressions)
102 :
103 : bool
104 0 : UnionExpr::isSensitiveTo(ContextSensitivity aContext)
105 : {
106 0 : PRUint32 i, len = mExpressions.Length();
107 0 : for (i = 0; i < len; ++i) {
108 0 : if (mExpressions[i]->isSensitiveTo(aContext)) {
109 0 : return true;
110 : }
111 : }
112 :
113 0 : return false;
114 : }
115 :
116 : #ifdef TX_TO_STRING
117 : void
118 0 : UnionExpr::toString(nsAString& dest)
119 : {
120 : PRUint32 i;
121 0 : for (i = 0; i < mExpressions.Length(); ++i) {
122 0 : if (i > 0)
123 0 : dest.AppendLiteral(" | ");
124 0 : mExpressions[i]->toString(dest);
125 : }
126 0 : }
127 : #endif
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