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Side by Side Diff: Source/core/layout/style/CounterDirectives.h

Issue 1045723009: Move core/layout/style to core/style (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Rebase. Created 5 years, 8 months ago
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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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