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1 /* | 1 /* |
2 * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. | 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * This library is free software; you can redistribute it and/or | 4 * This library is free software; you can redistribute it and/or |
5 * modify it under the terms of the GNU Library General Public | 5 * modify it under the terms of the GNU Library General Public |
6 * License as published by the Free Software Foundation; either | 6 * License as published by the Free Software Foundation; either |
7 * version 2 of the License, or (at your option) any later version. | 7 * version 2 of the License, or (at your option) any later version. |
8 * | 8 * |
9 * This library is distributed in the hope that it will be useful, | 9 * This library is distributed in the hope that it will be useful, |
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 * Library General Public License for more details. | 12 * Library General Public License for more details. |
13 * | 13 * |
14 * You should have received a copy of the GNU Library General Public License | 14 * You should have received a copy of the GNU Library General Public License |
15 * along with this library; see the file COPYING.LIB. If not, write to | 15 * along with this library; see the file COPYING.LIB. If not, write to |
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
17 * Boston, MA 02110-1301, USA. | 17 * Boston, MA 02110-1301, USA. |
18 * | 18 * |
19 */ | 19 */ |
20 | 20 |
21 #ifndef StepRange_h | 21 #ifndef StepRange_h |
22 #define StepRange_h | 22 #define StepRange_h |
23 | 23 |
24 #include "platform/Decimal.h" | 24 #include "platform/Decimal.h" |
| 25 #include "wtf/Allocator.h" |
25 #include "wtf/Forward.h" | 26 #include "wtf/Forward.h" |
26 | 27 |
27 namespace blink { | 28 namespace blink { |
28 | 29 |
29 enum AnyStepHandling { RejectAny, AnyIsDefaultStep }; | 30 enum AnyStepHandling { RejectAny, AnyIsDefaultStep }; |
30 | 31 |
31 class StepRange { | 32 class StepRange { |
| 33 DISALLOW_ALLOCATION(); |
32 public: | 34 public: |
33 enum StepValueShouldBe { | 35 enum StepValueShouldBe { |
34 StepValueShouldBeReal, | 36 StepValueShouldBeReal, |
35 ParsedStepValueShouldBeInteger, | 37 ParsedStepValueShouldBeInteger, |
36 ScaledStepValueShouldBeInteger, | 38 ScaledStepValueShouldBeInteger, |
37 }; | 39 }; |
38 | 40 |
39 struct StepDescription { | 41 struct StepDescription { |
40 WTF_MAKE_FAST_ALLOCATED(StepDescription); | 42 WTF_MAKE_FAST_ALLOCATED(StepDescription); |
41 public: | 43 public: |
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94 return (value - m_minimum) / (m_maximum - m_minimum); | 96 return (value - m_minimum) / (m_maximum - m_minimum); |
95 } | 97 } |
96 | 98 |
97 // Map from 0-1 range to value | 99 // Map from 0-1 range to value |
98 Decimal valueFromProportion(const Decimal& proportion) const | 100 Decimal valueFromProportion(const Decimal& proportion) const |
99 { | 101 { |
100 return m_minimum + proportion * (m_maximum - m_minimum); | 102 return m_minimum + proportion * (m_maximum - m_minimum); |
101 } | 103 } |
102 | 104 |
103 private: | 105 private: |
104 StepRange& operator =(const StepRange&); | 106 StepRange& operator=(const StepRange&) = delete; |
105 Decimal acceptableError() const; | 107 Decimal acceptableError() const; |
106 Decimal roundByStep(const Decimal& value, const Decimal& base) const; | 108 Decimal roundByStep(const Decimal& value, const Decimal& base) const; |
107 | 109 |
108 const Decimal m_maximum; // maximum must be >= minimum. | 110 const Decimal m_maximum; // maximum must be >= minimum. |
109 const Decimal m_minimum; | 111 const Decimal m_minimum; |
110 const Decimal m_step; | 112 const Decimal m_step; |
111 const Decimal m_stepBase; | 113 const Decimal m_stepBase; |
112 const StepDescription m_stepDescription; | 114 const StepDescription m_stepDescription; |
113 const bool m_hasStep; | 115 const bool m_hasStep; |
114 }; | 116 }; |
115 | 117 |
116 } | 118 } |
117 | 119 |
118 #endif // StepRange_h | 120 #endif // StepRange_h |
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