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 : * Jonas Sicking.
19 : * Portions created by the Initial Developer are Copyright (C) 2001
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Jonas Sicking <sicking@bigfoot.com>
24 : * Peter Van der Beken <peterv@propagandism.org>
25 : *
26 : * Alternatively, the contents of this file may be used under the terms of
27 : * either the GNU General Public License Version 2 or later (the "GPL"), or
28 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 : * in which case the provisions of the GPL or the LGPL are applicable instead
30 : * of those above. If you wish to allow use of your version of this file only
31 : * under the terms of either the GPL or the LGPL, and not to allow others to
32 : * use your version of this file under the terms of the MPL, indicate your
33 : * decision by deleting the provisions above and replace them with the notice
34 : * and other provisions required by the GPL or the LGPL. If you do not delete
35 : * the provisions above, a recipient may use your version of this file under
36 : * the terms of any one of the MPL, the GPL or the LGPL.
37 : *
38 : * ***** END LICENSE BLOCK ***** */
39 :
40 : #ifndef TRANSFRMX_XPATHRESULTCOMPARATOR_H
41 : #define TRANSFRMX_XPATHRESULTCOMPARATOR_H
42 :
43 : #include "txCore.h"
44 : #include "nsCOMPtr.h"
45 : #include "nsICollation.h"
46 : #include "nsString.h"
47 :
48 : class Expr;
49 : class txIEvalContext;
50 :
51 : /*
52 : * Result comparators
53 : */
54 : class txXPathResultComparator
55 0 : {
56 : public:
57 0 : virtual ~txXPathResultComparator()
58 0 : {
59 0 : }
60 :
61 : /*
62 : * Compares two XPath results. Returns -1 if val1 < val2,
63 : * 1 if val1 > val2 and 0 if val1 == val2.
64 : */
65 : virtual int compareValues(txObject* val1, txObject* val2) = 0;
66 :
67 : /*
68 : * Create a sortable value.
69 : */
70 : virtual nsresult createSortableValue(Expr *aExpr, txIEvalContext *aContext,
71 : txObject *&aResult) = 0;
72 : };
73 :
74 : /*
75 : * Compare results as stings (data-type="text")
76 : */
77 : class txResultStringComparator : public txXPathResultComparator
78 0 : {
79 : public:
80 : txResultStringComparator(bool aAscending, bool aUpperFirst,
81 : const nsAFlatString& aLanguage);
82 :
83 : int compareValues(txObject* aVal1, txObject* aVal2);
84 : nsresult createSortableValue(Expr *aExpr, txIEvalContext *aContext,
85 : txObject *&aResult);
86 : private:
87 : nsCOMPtr<nsICollation> mCollation;
88 : nsresult init(const nsAFlatString& aLanguage);
89 : nsresult createRawSortKey(const PRInt32 aStrength,
90 : const nsString& aString,
91 : PRUint8** aKey,
92 : PRUint32* aLength);
93 : int mSorting;
94 :
95 : class StringValue : public txObject
96 : {
97 : public:
98 : StringValue();
99 : ~StringValue();
100 :
101 : PRUint8* mKey;
102 : void* mCaseKey;
103 : PRUint32 mLength, mCaseLength;
104 : };
105 : };
106 :
107 : /*
108 : * Compare results as numbers (data-type="number")
109 : */
110 : class txResultNumberComparator : public txXPathResultComparator
111 0 : {
112 : public:
113 : txResultNumberComparator(bool aAscending);
114 :
115 : int compareValues(txObject* aVal1, txObject* aVal2);
116 : nsresult createSortableValue(Expr *aExpr, txIEvalContext *aContext,
117 : txObject *&aResult);
118 :
119 : private:
120 : int mAscending;
121 :
122 : class NumberValue : public txObject
123 0 : {
124 : public:
125 : double mVal;
126 : };
127 : };
128 :
129 : #endif
|