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 "nsIAtom.h"
41 : #include "txNodeSet.h"
42 : #include "nsGkAtoms.h"
43 : #include "txIXPathContext.h"
44 :
45 : //-------------------/
46 : //- VariableRefExpr -/
47 : //-------------------/
48 :
49 : /**
50 : * Creates a VariableRefExpr with the given variable name
51 : **/
52 0 : VariableRefExpr::VariableRefExpr(nsIAtom* aPrefix, nsIAtom* aLocalName,
53 : PRInt32 aNSID)
54 0 : : mPrefix(aPrefix), mLocalName(aLocalName), mNamespace(aNSID)
55 : {
56 0 : NS_ASSERTION(mLocalName, "VariableRefExpr without local name?");
57 0 : if (mPrefix == nsGkAtoms::_empty)
58 0 : mPrefix = 0;
59 0 : }
60 :
61 : /**
62 : * Evaluates this Expr based on the given context node and processor state
63 : * @param context the context node for evaluation of this Expr
64 : * @param ps the ContextState containing the stack information needed
65 : * for evaluation
66 : * @return the result of the evaluation
67 : **/
68 : nsresult
69 0 : VariableRefExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
70 : {
71 0 : nsresult rv = aContext->getVariable(mNamespace, mLocalName, *aResult);
72 0 : if (NS_FAILED(rv)) {
73 : // XXX report error, undefined variable
74 0 : return rv;
75 : }
76 0 : return NS_OK;
77 : }
78 :
79 0 : TX_IMPL_EXPR_STUBS_0(VariableRefExpr, ANY_RESULT)
80 :
81 : bool
82 0 : VariableRefExpr::isSensitiveTo(ContextSensitivity aContext)
83 : {
84 0 : return !!(aContext & VARIABLES_CONTEXT);
85 : }
86 :
87 : #ifdef TX_TO_STRING
88 : void
89 0 : VariableRefExpr::toString(nsAString& aDest)
90 : {
91 0 : aDest.Append(PRUnichar('$'));
92 0 : if (mPrefix) {
93 0 : nsAutoString prefix;
94 0 : mPrefix->ToString(prefix);
95 0 : aDest.Append(prefix);
96 0 : aDest.Append(PRUnichar(':'));
97 : }
98 0 : nsAutoString lname;
99 0 : mLocalName->ToString(lname);
100 0 : aDest.Append(lname);
101 0 : }
102 : #endif
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