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1 /* | |
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org) | |
3 * (C) 2000 Antti Koivisto (koivisto@kde.org) | |
4 * (C) 2000 Dirk Mueller (mueller@kde.org) | |
5 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. | |
6 * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com) | |
7 * | |
8 * This library is free software; you can redistribute it and/or | |
9 * modify it under the terms of the GNU Library General Public | |
10 * License as published by the Free Software Foundation; either | |
11 * version 2 of the License, or (at your option) any later version. | |
12 * | |
13 * This library is distributed in the hope that it will be useful, | |
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 * Library General Public License for more details. | |
17 * | |
18 * You should have received a copy of the GNU Library General Public License | |
19 * along with this library; see the file COPYING.LIB. If not, write to | |
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
21 * Boston, MA 02110-1301, USA. | |
22 * | |
23 */ | |
24 | |
25 #ifndef CounterDirectives_h | |
26 #define CounterDirectives_h | |
27 | |
28 #include "wtf/HashMap.h" | |
29 #include "wtf/MathExtras.h" | |
30 #include "wtf/RefPtr.h" | |
31 #include "wtf/text/AtomicString.h" | |
32 #include "wtf/text/AtomicStringHash.h" | |
33 | |
34 namespace blink { | |
35 | |
36 class CounterDirectives { | |
37 public: | |
38 CounterDirectives() | |
39 : m_isResetSet(false) | |
40 , m_isIncrementSet(false) | |
41 , m_resetValue(0) | |
42 , m_incrementValue(0) | |
43 { | |
44 } | |
45 | |
46 // FIXME: The code duplication here could possibly be replaced by using two | |
47 // maps, or by using a container that held two generic Directive objects. | |
48 | |
49 bool isReset() const { return m_isResetSet; } | |
50 int resetValue() const { return m_resetValue; } | |
51 void setResetValue(int value) | |
52 { | |
53 m_resetValue = value; | |
54 m_isResetSet = true; | |
55 } | |
56 void clearReset() | |
57 { | |
58 m_resetValue = 0; | |
59 m_isResetSet = false; | |
60 } | |
61 void inheritReset(const CounterDirectives& parent) | |
62 { | |
63 m_resetValue = parent.m_resetValue; | |
64 m_isResetSet = parent.m_isResetSet; | |
65 } | |
66 | |
67 bool isIncrement() const { return m_isIncrementSet; } | |
68 int incrementValue() const { return m_incrementValue; } | |
69 void addIncrementValue(int value) | |
70 { | |
71 m_incrementValue = clampTo<int>((double)m_incrementValue + value); | |
72 m_isIncrementSet = true; | |
73 } | |
74 void clearIncrement() | |
75 { | |
76 m_incrementValue = 0; | |
77 m_isIncrementSet = false; | |
78 } | |
79 void inheritIncrement(const CounterDirectives& parent) | |
80 { | |
81 m_incrementValue = parent.m_incrementValue; | |
82 m_isIncrementSet = parent.m_isIncrementSet; | |
83 } | |
84 | |
85 bool isDefined() const { return isReset() || isIncrement(); } | |
86 | |
87 int combinedValue() const | |
88 { | |
89 ASSERT(m_isResetSet || !m_resetValue); | |
90 ASSERT(m_isIncrementSet || !m_incrementValue); | |
91 // FIXME: Shouldn't allow overflow here. | |
92 return m_resetValue + m_incrementValue; | |
93 } | |
94 | |
95 private: | |
96 bool m_isResetSet; | |
97 bool m_isIncrementSet; | |
98 int m_resetValue; | |
99 int m_incrementValue; | |
100 }; | |
101 | |
102 bool operator==(const CounterDirectives&, const CounterDirectives&); | |
103 inline bool operator!=(const CounterDirectives& a, const CounterDirectives& b) {
return !(a == b); } | |
104 | |
105 typedef HashMap<AtomicString, CounterDirectives> CounterDirectiveMap; | |
106 | |
107 PassOwnPtr<CounterDirectiveMap> clone(const CounterDirectiveMap&); | |
108 | |
109 } // namespace blink | |
110 | |
111 #endif // CounterDirectives_h | |
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