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 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 2001
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Peter Van der Beken <peterv@propagandism.org>
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
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34 : * the provisions above, a recipient may use your version of this file under
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36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #ifndef nsXPathExpression_h__
40 : #define nsXPathExpression_h__
41 :
42 : #include "nsIDOMXPathExpression.h"
43 : #include "nsIDOMNSXPathExpression.h"
44 : #include "txIXPathContext.h"
45 : #include "txResultRecycler.h"
46 : #include "nsAutoPtr.h"
47 : #include "nsCycleCollectionParticipant.h"
48 :
49 : class Expr;
50 : class txXPathNode;
51 :
52 : /**
53 : * A class for evaluating an XPath expression string
54 : */
55 : class nsXPathExpression : public nsIDOMXPathExpression,
56 : public nsIDOMNSXPathExpression
57 42 : {
58 : public:
59 : nsXPathExpression(nsAutoPtr<Expr>& aExpression, txResultRecycler* aRecycler,
60 : nsIDOMDocument *aDocument);
61 :
62 : // nsISupports interface
63 26 : NS_DECL_CYCLE_COLLECTING_ISUPPORTS
64 2144 : NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsXPathExpression,
65 : nsIDOMXPathExpression)
66 :
67 : // nsIDOMXPathExpression interface
68 : NS_DECL_NSIDOMXPATHEXPRESSION
69 :
70 : // nsIDOMNSXPathExpression interface
71 : NS_DECL_NSIDOMNSXPATHEXPRESSION
72 :
73 : private:
74 : nsAutoPtr<Expr> mExpression;
75 : nsRefPtr<txResultRecycler> mRecycler;
76 : nsCOMPtr<nsIDOMDocument> mDocument;
77 :
78 : class EvalContextImpl : public txIEvalContext
79 84 : {
80 : public:
81 42 : EvalContextImpl(const txXPathNode& aContextNode,
82 : PRUint32 aContextPosition, PRUint32 aContextSize,
83 : txResultRecycler* aRecycler)
84 : : mContextNode(aContextNode),
85 : mContextPosition(aContextPosition),
86 : mContextSize(aContextSize),
87 : mLastError(NS_OK),
88 42 : mRecycler(aRecycler)
89 : {
90 42 : }
91 :
92 : nsresult getError()
93 : {
94 : return mLastError;
95 : }
96 :
97 : TX_DECL_EVAL_CONTEXT;
98 :
99 : private:
100 : const txXPathNode& mContextNode;
101 : PRUint32 mContextPosition;
102 : PRUint32 mContextSize;
103 : nsresult mLastError;
104 : nsRefPtr<txResultRecycler> mRecycler;
105 : };
106 : };
107 :
108 : #endif
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